diff options
Diffstat (limited to 'generic/tclCompCmds.c')
| -rw-r--r-- | generic/tclCompCmds.c | 6525 |
1 files changed, 1692 insertions, 4833 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c index d01964d..d1d7a80 100644 --- a/generic/tclCompCmds.c +++ b/generic/tclCompCmds.c @@ -7,133 +7,15 @@ * Copyright (c) 1997-1998 Sun Microsystems, Inc. * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved. * Copyright (c) 2002 ActiveState Corporation. - * Copyright (c) 2004-2006 by Donal K. Fellows. + * Copyright (c) 2004-2013 by Donal K. Fellows. * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. - * - * RCS: @(#) $Id: tclCompCmds.c,v 1.143.2.2 2009/08/25 21:01:05 andreas_kupries Exp $ */ #include "tclInt.h" #include "tclCompile.h" - -/* - * Macro that encapsulates an efficiency trick that avoids a function call for - * the simplest of compiles. The ANSI C "prototype" for this macro is: - * - * static void CompileWord(CompileEnv *envPtr, Tcl_Token *tokenPtr, - * Tcl_Interp *interp, int word); - */ - -#define CompileWord(envPtr, tokenPtr, interp, word) \ - if ((tokenPtr)->type == TCL_TOKEN_SIMPLE_WORD) { \ - TclEmitPush(TclRegisterNewLiteral((envPtr), (tokenPtr)[1].start, \ - (tokenPtr)[1].size), (envPtr)); \ - } else { \ - envPtr->line = mapPtr->loc[eclIndex].line[word]; \ - envPtr->clNext = mapPtr->loc[eclIndex].next[word]; \ - TclCompileTokens((interp), (tokenPtr)+1, (tokenPtr)->numComponents, \ - (envPtr)); \ - } - -/* - * TIP #280: Remember the per-word line information of the current command. An - * index is used instead of a pointer as recursive compilation may reallocate, - * i.e. move, the array. This is also the reason to save the nuloc now, it may - * change during the course of the function. - * - * Macro to encapsulate the variable definition and setup. - */ - -#define DefineLineInformation \ - ExtCmdLoc *mapPtr = envPtr->extCmdMapPtr; \ - int eclIndex = mapPtr->nuloc - 1 - -#define SetLineInformation(word) \ - envPtr->line = mapPtr->loc [eclIndex].line [(word)]; \ - envPtr->clNext = mapPtr->loc [eclIndex].next [(word)] - -/* - * Convenience macro for use when compiling bodies of commands. The ANSI C - * "prototype" for this macro is: - * - * static void CompileBody(CompileEnv *envPtr, Tcl_Token *tokenPtr, - * Tcl_Interp *interp); - */ - -#define CompileBody(envPtr, tokenPtr, interp) \ - TclCompileCmdWord((interp), (tokenPtr)+1, (tokenPtr)->numComponents, \ - (envPtr)) - -/* - * Convenience macro for use when compiling tokens to be pushed. The ANSI C - * "prototype" for this macro is: - * - * static void CompileTokens(CompileEnv *envPtr, Tcl_Token *tokenPtr, - * Tcl_Interp *interp); - */ - -#define CompileTokens(envPtr, tokenPtr, interp) \ - TclCompileTokens((interp), (tokenPtr)+1, (tokenPtr)->numComponents, \ - (envPtr)); -/* - * Convenience macro for use when pushing literals. The ANSI C "prototype" for - * this macro is: - * - * static void PushLiteral(CompileEnv *envPtr, - * const char *string, int length); - */ - -#define PushLiteral(envPtr, string, length) \ - TclEmitPush(TclRegisterNewLiteral((envPtr), (string), (length)), (envPtr)) - -/* - * Macro to advance to the next token; it is more mnemonic than the address - * arithmetic that it replaces. The ANSI C "prototype" for this macro is: - * - * static Tcl_Token * TokenAfter(Tcl_Token *tokenPtr); - */ - -#define TokenAfter(tokenPtr) \ - ((tokenPtr) + ((tokenPtr)->numComponents + 1)) - -/* - * Macro to get the offset to the next instruction to be issued. The ANSI C - * "prototype" for this macro is: - * - * static int CurrentOffset(CompileEnv *envPtr); - */ - -#define CurrentOffset(envPtr) \ - ((envPtr)->codeNext - (envPtr)->codeStart) - -/* - * Note: the exceptDepth is a bit of a misnomer: TEBC only needs the - * maximal depth of nested CATCH ranges in order to alloc runtime - * memory. These macros should compute precisely that? OTOH, the nesting depth - * of LOOP ranges is an interesting datum for debugging purposes, and that is - * what we compute now. - * - * static int DeclareExceptionRange(CompileEnv *envPtr, int type); - * static int ExceptionRangeStarts(CompileEnv *envPtr, int index); - * static void ExceptionRangeEnds(CompileEnv *envPtr, int index); - * static void ExceptionRangeTarget(CompileEnv *envPtr, int index, LABEL); - */ - -#define DeclareExceptionRange(envPtr, type) \ - (TclCreateExceptRange((type), (envPtr))) -#define ExceptionRangeStarts(envPtr, index) \ - (((envPtr)->exceptDepth++), \ - ((envPtr)->maxExceptDepth = \ - TclMax((envPtr)->exceptDepth, (envPtr)->maxExceptDepth)), \ - ((envPtr)->exceptArrayPtr[(index)].codeOffset = CurrentOffset(envPtr))) -#define ExceptionRangeEnds(envPtr, index) \ - (((envPtr)->exceptDepth--), \ - ((envPtr)->exceptArrayPtr[(index)].numCodeBytes = \ - CurrentOffset(envPtr) - (envPtr)->exceptArrayPtr[(index)].codeOffset)) -#define ExceptionRangeTarget(envPtr, index, targetType) \ - ((envPtr)->exceptArrayPtr[(index)].targetType = CurrentOffset(envPtr)) +#include <assert.h> /* * Prototypes for procedures defined later in this file: @@ -149,63 +31,35 @@ static void FreeForeachInfo(ClientData clientData); static void PrintForeachInfo(ClientData clientData, Tcl_Obj *appendObj, ByteCode *codePtr, unsigned int pcOffset); -static ClientData DupJumptableInfo(ClientData clientData); -static void FreeJumptableInfo(ClientData clientData); -static void PrintJumptableInfo(ClientData clientData, +static void PrintNewForeachInfo(ClientData clientData, Tcl_Obj *appendObj, ByteCode *codePtr, unsigned int pcOffset); -static int PushVarName(Tcl_Interp *interp, - Tcl_Token *varTokenPtr, CompileEnv *envPtr, - int flags, int *localIndexPtr, - int *simpleVarNamePtr, int *isScalarPtr, - int line, int* clNext); -static int CompileAssociativeBinaryOpCmd(Tcl_Interp *interp, - Tcl_Parse *parsePtr, const char *identity, - int instruction, CompileEnv *envPtr); -static int CompileComparisonOpCmd(Tcl_Interp *interp, - Tcl_Parse *parsePtr, int instruction, - CompileEnv *envPtr); -static int CompileStrictlyBinaryOpCmd(Tcl_Interp *interp, - Tcl_Parse *parsePtr, int instruction, - CompileEnv *envPtr); -static int CompileUnaryOpCmd(Tcl_Interp *interp, - Tcl_Parse *parsePtr, int instruction, - CompileEnv *envPtr); -static void CompileReturnInternal(CompileEnv *envPtr, - unsigned char op, int code, int level, - Tcl_Obj *returnOpts); - -#define PushVarNameWord(i,v,e,f,l,s,sc,word) \ - PushVarName (i,v,e,f,l,s,sc, \ - mapPtr->loc [eclIndex].line [(word)], \ - mapPtr->loc [eclIndex].next [(word)]) - -/* - * Flags bits used by PushVarName. - */ - -#define TCL_CREATE_VAR 1 /* Create a compiled local if none is found */ -#define TCL_NO_LARGE_INDEX 2 /* Do not return localIndex value > 255 */ +static int CompileEachloopCmd(Tcl_Interp *interp, + Tcl_Parse *parsePtr, Command *cmdPtr, + CompileEnv *envPtr, int collect); +static int CompileDictEachCmd(Tcl_Interp *interp, + Tcl_Parse *parsePtr, Command *cmdPtr, + struct CompileEnv *envPtr, int collect); /* * The structures below define the AuxData types defined in this file. */ -AuxDataType tclForeachInfoType = { +const AuxDataType tclForeachInfoType = { "ForeachInfo", /* name */ DupForeachInfo, /* dupProc */ FreeForeachInfo, /* freeProc */ PrintForeachInfo /* printProc */ }; -AuxDataType tclJumptableInfoType = { - "JumptableInfo", /* name */ - DupJumptableInfo, /* dupProc */ - FreeJumptableInfo, /* freeProc */ - PrintJumptableInfo /* printProc */ +const AuxDataType tclNewForeachInfoType = { + "NewForeachInfo", /* name */ + DupForeachInfo, /* dupProc */ + FreeForeachInfo, /* freeProc */ + PrintNewForeachInfo /* printProc */ }; -AuxDataType tclDictUpdateInfoType = { +const AuxDataType tclDictUpdateInfoType = { "DictUpdateInfo", /* name */ DupDictUpdateInfo, /* dupProc */ FreeDictUpdateInfo, /* freeProc */ @@ -220,8 +74,8 @@ AuxDataType tclDictUpdateInfoType = { * Procedure called to compile the "append" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "append" command at @@ -240,9 +94,10 @@ TclCompileAppendCmd( CompileEnv *envPtr) /* Holds resulting instructions. */ { Tcl_Token *varTokenPtr, *valueTokenPtr; - int simpleVarName, isScalar, localIndex, numWords; + int isScalar, localIndex, numWords, i; DefineLineInformation; /* TIP #280 */ + /* TODO: Consider support for compiling expanded args. */ numWords = parsePtr->numWords; if (numWords == 1) { return TCL_ERROR; @@ -254,10 +109,11 @@ TclCompileAppendCmd( return TclCompileSetCmd(interp, parsePtr, cmdPtr, envPtr); } else if (numWords > 3) { /* - * APPEND instructions currently only handle one value. + * APPEND instructions currently only handle one value, but we can + * handle some multi-value cases by stringing them together. */ - return TCL_ERROR; + goto appendMultiple; } /* @@ -270,8 +126,8 @@ TclCompileAppendCmd( varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); + PushVarNameWord(interp, varTokenPtr, envPtr, 0, + &localIndex, &isScalar, 1); /* * We are doing an assignment, otherwise TclCompileSetCmd was called, so @@ -279,37 +135,311 @@ TclCompileAppendCmd( * each argument. */ - if (numWords > 2) { valueTokenPtr = TokenAfter(varTokenPtr); CompileWord(envPtr, valueTokenPtr, interp, 2); - } /* * Emit instructions to set/get the variable. */ - if (simpleVarName) { if (isScalar) { if (localIndex < 0) { TclEmitOpcode(INST_APPEND_STK, envPtr); - } else if (localIndex <= 255) { - TclEmitInstInt1(INST_APPEND_SCALAR1, localIndex, envPtr); } else { - TclEmitInstInt4(INST_APPEND_SCALAR4, localIndex, envPtr); + Emit14Inst(INST_APPEND_SCALAR, localIndex, envPtr); } } else { if (localIndex < 0) { TclEmitOpcode(INST_APPEND_ARRAY_STK, envPtr); - } else if (localIndex <= 255) { - TclEmitInstInt1(INST_APPEND_ARRAY1, localIndex, envPtr); } else { - TclEmitInstInt4(INST_APPEND_ARRAY4, localIndex, envPtr); + Emit14Inst(INST_APPEND_ARRAY, localIndex, envPtr); } } + + return TCL_OK; + + appendMultiple: + /* + * Can only handle the case where we are appending to a local scalar when + * there are multiple values to append. Fortunately, this is common. + */ + + varTokenPtr = TokenAfter(parsePtr->tokenPtr); + PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_ELEMENT, + &localIndex, &isScalar, 1); + if (!isScalar || localIndex < 0) { + return TCL_ERROR; + } + + /* + * Definitely appending to a local scalar; generate the words and append + * them. + */ + + valueTokenPtr = TokenAfter(varTokenPtr); + for (i = 2 ; i < numWords ; i++) { + CompileWord(envPtr, valueTokenPtr, interp, i); + valueTokenPtr = TokenAfter(valueTokenPtr); + } + TclEmitInstInt4( INST_REVERSE, numWords-2, envPtr); + for (i = 2 ; i < numWords ;) { + Emit14Inst( INST_APPEND_SCALAR, localIndex, envPtr); + if (++i < numWords) { + TclEmitOpcode(INST_POP, envPtr); + } + } + + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * TclCompileArray*Cmd -- + * + * Functions called to compile "array" sucommands. + * + * Results: + * All return TCL_OK for a successful compile, and TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "array" subcommand at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileArrayExistsCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr; + int isScalar, localIndex; + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + PushVarNameWord(interp, tokenPtr, envPtr, TCL_NO_ELEMENT, + &localIndex, &isScalar, 1); + if (!isScalar) { + return TCL_ERROR; + } + + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); } else { - TclEmitOpcode(INST_APPEND_STK, envPtr); + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + } + return TCL_OK; +} + +int +TclCompileArraySetCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *varTokenPtr, *dataTokenPtr; + int isScalar, localIndex, code = TCL_OK; + int isDataLiteral, isDataValid, isDataEven, len; + int keyVar, valVar, infoIndex; + int fwd, offsetBack, offsetFwd; + Tcl_Obj *literalObj; + ForeachInfo *infoPtr; + + if (parsePtr->numWords != 3) { + return TCL_ERROR; } + varTokenPtr = TokenAfter(parsePtr->tokenPtr); + dataTokenPtr = TokenAfter(varTokenPtr); + literalObj = Tcl_NewObj(); + isDataLiteral = TclWordKnownAtCompileTime(dataTokenPtr, literalObj); + isDataValid = (isDataLiteral + && Tcl_ListObjLength(NULL, literalObj, &len) == TCL_OK); + isDataEven = (isDataValid && (len & 1) == 0); + + /* + * Special case: literal odd-length argument is always an error. + */ + + if (isDataValid && !isDataEven) { + PushStringLiteral(envPtr, "list must have an even number of elements"); + PushStringLiteral(envPtr, "-errorcode {TCL ARGUMENT FORMAT}"); + TclEmitInstInt4(INST_RETURN_IMM, TCL_ERROR, envPtr); + TclEmitInt4( 0, envPtr); + goto done; + } + + /* + * Except for the special "ensure array" case below, when we're not in + * a proc, we cannot do a better compile than generic. + */ + + if (envPtr->procPtr == NULL && !(isDataEven && len == 0)) { + code = TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr); + goto done; + } + + PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_ELEMENT, + &localIndex, &isScalar, 1); + if (!isScalar) { + code = TCL_ERROR; + goto done; + } + + /* + * Special case: literal empty value argument is just an "ensure array" + * operation. + */ + + if (isDataEven && len == 0) { + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 7, envPtr); + TclEmitInstInt4(INST_ARRAY_MAKE_IMM, localIndex, envPtr); + } else { + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 5, envPtr); + TclEmitOpcode( INST_ARRAY_MAKE_STK, envPtr); + TclEmitInstInt1(INST_JUMP1, 3, envPtr); + /* Each branch decrements stack depth, but we only take one. */ + TclAdjustStackDepth(1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + PushStringLiteral(envPtr, ""); + goto done; + } + + if (localIndex < 0) { + /* + * a non-local variable: upvar from a local one! This consumes the + * variable name that was left at stacktop. + */ + + localIndex = AnonymousLocal(envPtr); + PushStringLiteral(envPtr, "0"); + TclEmitInstInt4(INST_REVERSE, 2, envPtr); + TclEmitInstInt4(INST_UPVAR, localIndex, envPtr); + TclEmitOpcode(INST_POP, envPtr); + } + + /* + * Prepare for the internal foreach. + */ + + keyVar = AnonymousLocal(envPtr); + valVar = AnonymousLocal(envPtr); + + infoPtr = ckalloc(sizeof(ForeachInfo)); + infoPtr->numLists = 1; + infoPtr->varLists[0] = ckalloc(sizeof(ForeachVarList) + sizeof(int)); + infoPtr->varLists[0]->numVars = 2; + infoPtr->varLists[0]->varIndexes[0] = keyVar; + infoPtr->varLists[0]->varIndexes[1] = valVar; + infoIndex = TclCreateAuxData(infoPtr, &tclForeachInfoType, envPtr); + + /* + * Start issuing instructions to write to the array. + */ + + CompileWord(envPtr, dataTokenPtr, interp, 2); + if (!isDataLiteral || !isDataValid) { + /* + * Only need this safety check if we're handling a non-literal or list + * containing an invalid literal; with valid list literals, we've + * already checked (worth it because literals are a very common + * use-case with [array set]). + */ + + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_LIST_LENGTH, envPtr); + PushStringLiteral(envPtr, "1"); + TclEmitOpcode( INST_BITAND, envPtr); + offsetFwd = CurrentOffset(envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 0, envPtr); + PushStringLiteral(envPtr, "list must have an even number of elements"); + PushStringLiteral(envPtr, "-errorcode {TCL ARGUMENT FORMAT}"); + TclEmitInstInt4(INST_RETURN_IMM, TCL_ERROR, envPtr); + TclEmitInt4( 0, envPtr); + TclAdjustStackDepth(-1, envPtr); + fwd = CurrentOffset(envPtr) - offsetFwd; + TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1); + } + + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 7, envPtr); + TclEmitInstInt4(INST_ARRAY_MAKE_IMM, localIndex, envPtr); + TclEmitInstInt4(INST_FOREACH_START, infoIndex, envPtr); + offsetBack = CurrentOffset(envPtr); + Emit14Inst( INST_LOAD_SCALAR, keyVar, envPtr); + Emit14Inst( INST_LOAD_SCALAR, valVar, envPtr); + Emit14Inst( INST_STORE_ARRAY, localIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); + infoPtr->loopCtTemp = offsetBack - CurrentOffset(envPtr); /*misuse */ + TclEmitOpcode( INST_FOREACH_STEP, envPtr); + TclEmitOpcode( INST_FOREACH_END, envPtr); + TclAdjustStackDepth(-3, envPtr); + PushStringLiteral(envPtr, ""); + + done: + Tcl_DecrRefCount(literalObj); + return code; +} + +int +TclCompileArrayUnsetCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr); + int isScalar, localIndex; + + if (parsePtr->numWords != 2) { + return TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } + + PushVarNameWord(interp, tokenPtr, envPtr, TCL_NO_ELEMENT, + &localIndex, &isScalar, 1); + if (!isScalar) { + return TCL_ERROR; + } + + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 8, envPtr); + TclEmitInstInt1(INST_UNSET_SCALAR, 1, envPtr); + TclEmitInt4( localIndex, envPtr); + } else { + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 6, envPtr); + TclEmitInstInt1(INST_UNSET_STK, 1, envPtr); + TclEmitInstInt1(INST_JUMP1, 3, envPtr); + /* Each branch decrements stack depth, but we only take one. */ + TclAdjustStackDepth(1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + PushStringLiteral(envPtr, ""); return TCL_OK; } @@ -321,8 +451,8 @@ TclCompileAppendCmd( * Procedure called to compile the "break" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "break" command at @@ -340,15 +470,34 @@ TclCompileBreakCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { + ExceptionRange *rangePtr; + ExceptionAux *auxPtr; + if (parsePtr->numWords != 1) { return TCL_ERROR; } /* - * Emit a break instruction. + * Find the innermost exception range that contains this command. */ - TclEmitOpcode(INST_BREAK, envPtr); + rangePtr = TclGetInnermostExceptionRange(envPtr, TCL_BREAK, &auxPtr); + if (rangePtr && rangePtr->type == LOOP_EXCEPTION_RANGE) { + /* + * Found the target! No need for a nasty INST_BREAK here. + */ + + TclCleanupStackForBreakContinue(envPtr, auxPtr); + TclAddLoopBreakFixup(envPtr, auxPtr); + } else { + /* + * Emit a real break. + */ + + TclEmitOpcode(INST_BREAK, envPtr); + } + TclAdjustStackDepth(1, envPtr); + return TCL_OK; } @@ -360,8 +509,8 @@ TclCompileBreakCmd( * Procedure called to compile the "catch" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "catch" command at @@ -381,11 +530,10 @@ TclCompileCatchCmd( { JumpFixup jumpFixup; Tcl_Token *cmdTokenPtr, *resultNameTokenPtr, *optsNameTokenPtr; - const char *name; - int resultIndex, optsIndex, nameChars, range; - int savedStackDepth = envPtr->currStackDepth; + int resultIndex, optsIndex, range, dropScript = 0; DefineLineInformation; /* TIP #280 */ - + int depth = TclGetStackDepth(envPtr); + /* * If syntax does not match what we expect for [catch], do not compile. * Let runtime checks determine if syntax has changed. @@ -400,7 +548,7 @@ TclCompileCatchCmd( * (not in a procedure), don't compile it inline: the payoff is too small. */ - if ((parsePtr->numWords >= 3) && (envPtr->procPtr == NULL)) { + if ((parsePtr->numWords >= 3) && !EnvHasLVT(envPtr)) { return TCL_ERROR; } @@ -414,141 +562,215 @@ TclCompileCatchCmd( if (parsePtr->numWords >= 3) { resultNameTokenPtr = TokenAfter(cmdTokenPtr); /* DGP */ - if (resultNameTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { + resultIndex = LocalScalarFromToken(resultNameTokenPtr, envPtr); + if (resultIndex < 0) { return TCL_ERROR; } - name = resultNameTokenPtr[1].start; - nameChars = resultNameTokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { - return TCL_ERROR; - } - resultIndex = TclFindCompiledLocal(resultNameTokenPtr[1].start, - resultNameTokenPtr[1].size, /*create*/ 1, envPtr->procPtr); - /* DKF */ if (parsePtr->numWords == 4) { optsNameTokenPtr = TokenAfter(resultNameTokenPtr); - if (optsNameTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { + optsIndex = LocalScalarFromToken(optsNameTokenPtr, envPtr); + if (optsIndex < 0) { return TCL_ERROR; } - name = optsNameTokenPtr[1].start; - nameChars = optsNameTokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { - return TCL_ERROR; - } - optsIndex = TclFindCompiledLocal(optsNameTokenPtr[1].start, - optsNameTokenPtr[1].size, /*create*/ 1, envPtr->procPtr); } } /* - * We will compile the catch command. Emit a beginCatch instruction at the - * start of the catch body: the subcommand it controls. + * We will compile the catch command. Declare the exception range that it + * uses. + * + * If the body is a simple word, compile a BEGIN_CATCH instruction, + * followed by the instructions to eval the body. + * Otherwise, compile instructions to substitute the body text before + * starting the catch, then BEGIN_CATCH, and then EVAL_STK to evaluate the + * substituted body. + * Care has to be taken to make sure that substitution happens outside the + * catch range so that errors in the substitution are not caught. + * [Bug 219184] + * The reason for duplicating the script is that EVAL_STK would otherwise + * begin by undeflowing the stack below the mark set by BEGIN_CATCH4. + */ + + range = TclCreateExceptRange(CATCH_EXCEPTION_RANGE, envPtr); + if (cmdTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { + TclEmitInstInt4( INST_BEGIN_CATCH4, range, envPtr); + ExceptionRangeStarts(envPtr, range); + BODY(cmdTokenPtr, 1); + } else { + SetLineInformation(1); + CompileTokens(envPtr, cmdTokenPtr, interp); + TclEmitInstInt4( INST_BEGIN_CATCH4, range, envPtr); + ExceptionRangeStarts(envPtr, range); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitInvoke(envPtr, INST_EVAL_STK); + /* drop the script */ + dropScript = 1; + TclEmitInstInt4( INST_REVERSE, 2, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + ExceptionRangeEnds(envPtr, range); + + + /* + * Emit the "no errors" epilogue: push "0" (TCL_OK) as the catch result, + * and jump around the "error case" code. */ - range = DeclareExceptionRange(envPtr, CATCH_EXCEPTION_RANGE); - TclEmitInstInt4(INST_BEGIN_CATCH4, range, envPtr); + TclCheckStackDepth(depth+1, envPtr); + PushStringLiteral(envPtr, "0"); + TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpFixup); + + /* + * Emit the "error case" epilogue. Push the interpreter result and the + * return code. + */ + + ExceptionRangeTarget(envPtr, range, catchOffset); + TclSetStackDepth(depth + dropScript, envPtr); + + if (dropScript) { + TclEmitOpcode( INST_POP, envPtr); + } + + + /* Stack at this point is empty */ + TclEmitOpcode( INST_PUSH_RESULT, envPtr); + TclEmitOpcode( INST_PUSH_RETURN_CODE, envPtr); + + /* Stack at this point on both branches: result returnCode */ + + if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) { + Tcl_Panic("TclCompileCatchCmd: bad jump distance %d", + (int)(CurrentOffset(envPtr) - jumpFixup.codeOffset)); + } /* - * If the body is a simple word, compile the instructions to eval it. - * Otherwise, compile instructions to substitute its text without - * catching, a catch instruction that resets the stack to what it was - * before substituting the body, and then an instruction to eval the body. - * Care has to be taken to register the correct startOffset for the catch - * range so that errors in the substitution are not catched [Bug 219184] + * Push the return options if the caller wants them. This needs to happen + * before INST_END_CATCH */ - SetLineInformation (1); - if (cmdTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - ExceptionRangeStarts(envPtr, range); - CompileBody(envPtr, cmdTokenPtr, interp); - ExceptionRangeEnds(envPtr, range); - } else { - CompileTokens(envPtr, cmdTokenPtr, interp); - ExceptionRangeStarts(envPtr, range); - TclEmitOpcode(INST_EVAL_STK, envPtr); - ExceptionRangeEnds(envPtr, range); + if (optsIndex != -1) { + TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); } /* - * The "no errors" epilogue code: store the body's result into the - * variable (if any), push "0" (TCL_OK) as the catch's "no error" result, - * and jump around the "error case" code. Note that we issue the push of - * the return options first so that if alterations happen to the current - * interpreter state during the writing of the variable, we won't see - * them; this results in a slightly complex instruction issuing flow - * (can't exchange, only duplicate and pop). + * End the catch */ - if (resultIndex != -1) { - if (optsIndex != -1) { - TclEmitOpcode(INST_PUSH_RETURN_OPTIONS, envPtr); - TclEmitInstInt4(INST_OVER, 1, envPtr); - } - if (resultIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, resultIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, resultIndex, envPtr); - } - if (optsIndex != -1) { - TclEmitOpcode(INST_POP, envPtr); - if (optsIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, optsIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, optsIndex, envPtr); - } - TclEmitOpcode(INST_POP, envPtr); - } + TclEmitOpcode( INST_END_CATCH, envPtr); + + /* + * Save the result and return options if the caller wants them. This needs + * to happen after INST_END_CATCH (compile-3.6/7). + */ + + if (optsIndex != -1) { + Emit14Inst( INST_STORE_SCALAR, optsIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); } - TclEmitOpcode(INST_POP, envPtr); - PushLiteral(envPtr, "0", 1); - TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpFixup); /* - * The "error case" code: store the body's result into the variable (if - * any), then push the error result code. The initial PC offset here is - * the catch's error target. Note that if we are saving the return - * options, we do that first so the preservation cannot get affected by - * any intermediate result handling. + * At this point, the top of the stack is inconveniently ordered: + * result returnCode + * Reverse the stack to store the result. */ - envPtr->currStackDepth = savedStackDepth; - ExceptionRangeTarget(envPtr, range, catchOffset); + TclEmitInstInt4( INST_REVERSE, 2, envPtr); if (resultIndex != -1) { - if (optsIndex != -1) { - TclEmitOpcode(INST_PUSH_RETURN_OPTIONS, envPtr); - } - TclEmitOpcode(INST_PUSH_RESULT, envPtr); - if (resultIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, resultIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, resultIndex, envPtr); - } - TclEmitOpcode(INST_POP, envPtr); - if (optsIndex != -1) { - if (optsIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, optsIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, optsIndex, envPtr); - } - TclEmitOpcode(INST_POP, envPtr); + Emit14Inst( INST_STORE_SCALAR, resultIndex, envPtr); + } + TclEmitOpcode( INST_POP, envPtr); + + TclCheckStackDepth(depth+1, envPtr); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * TclCompileConcatCmd -- + * + * Procedure called to compile the "concat" command. + * + * Results: + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "concat" command at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileConcatCmd( + Tcl_Interp *interp, /* Used for error reporting. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Obj *objPtr, *listObj; + Tcl_Token *tokenPtr; + int i; + + /* TODO: Consider compiling expansion case. */ + if (parsePtr->numWords == 1) { + /* + * [concat] without arguments just pushes an empty object. + */ + + PushStringLiteral(envPtr, ""); + return TCL_OK; + } + + /* + * Test if all arguments are compile-time known. If they are, we can + * implement with a simple push. + */ + + listObj = Tcl_NewObj(); + for (i = 1, tokenPtr = parsePtr->tokenPtr; i < parsePtr->numWords; i++) { + tokenPtr = TokenAfter(tokenPtr); + objPtr = Tcl_NewObj(); + if (!TclWordKnownAtCompileTime(tokenPtr, objPtr)) { + Tcl_DecrRefCount(objPtr); + Tcl_DecrRefCount(listObj); + listObj = NULL; + break; } + (void) Tcl_ListObjAppendElement(NULL, listObj, objPtr); + } + if (listObj != NULL) { + Tcl_Obj **objs; + const char *bytes; + int len; + + Tcl_ListObjGetElements(NULL, listObj, &len, &objs); + objPtr = Tcl_ConcatObj(len, objs); + Tcl_DecrRefCount(listObj); + bytes = Tcl_GetStringFromObj(objPtr, &len); + PushLiteral(envPtr, bytes, len); + Tcl_DecrRefCount(objPtr); + return TCL_OK; } - TclEmitOpcode(INST_PUSH_RETURN_CODE, envPtr); /* - * Update the target of the jump after the "no errors" code, then emit an - * endCatch instruction at the end of the catch command. + * General case: runtime concat. */ - if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) { - Tcl_Panic("TclCompileCatchCmd: bad jump distance %d", - CurrentOffset(envPtr) - jumpFixup.codeOffset); + for (i = 1, tokenPtr = parsePtr->tokenPtr; i < parsePtr->numWords; i++) { + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, i); } - TclEmitOpcode(INST_END_CATCH, envPtr); - envPtr->currStackDepth = savedStackDepth + 1; + TclEmitInstInt4( INST_CONCAT_STK, i-1, envPtr); + return TCL_OK; } @@ -560,8 +782,8 @@ TclCompileCatchCmd( * Procedure called to compile the "continue" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "continue" command at @@ -579,6 +801,9 @@ TclCompileContinueCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { + ExceptionRange *rangePtr; + ExceptionAux *auxPtr; + /* * There should be no argument after the "continue". */ @@ -588,10 +813,27 @@ TclCompileContinueCmd( } /* - * Emit a continue instruction. + * See if we can find a valid continueOffset (i.e., not -1) in the + * innermost containing exception range. */ - TclEmitOpcode(INST_CONTINUE, envPtr); + rangePtr = TclGetInnermostExceptionRange(envPtr, TCL_CONTINUE, &auxPtr); + if (rangePtr && rangePtr->type == LOOP_EXCEPTION_RANGE) { + /* + * Found the target! No need for a nasty INST_CONTINUE here. + */ + + TclCleanupStackForBreakContinue(envPtr, auxPtr); + TclAddLoopContinueFixup(envPtr, auxPtr); + } else { + /* + * Emit a real continue. + */ + + TclEmitOpcode(INST_CONTINUE, envPtr); + } + TclAdjustStackDepth(1, envPtr); + return TCL_OK; } @@ -603,32 +845,13 @@ TclCompileContinueCmd( * Functions called to compile "dict" sucommands. * * Results: - * All return TCL_OK for a successful compile, and TCL_ERROR to defer - * evaluation to runtime. + * All return TCL_OK for a successful compile, and TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "dict" subcommand at * runtime. * - * Notes: - * The following commands are in fairly common use and are possibly worth - * bytecoding: - * dict append - * dict create [*] - * dict exists [*] - * dict for - * dict get [*] - * dict incr - * dict keys [*] - * dict lappend - * dict set - * dict unset - * - * In practice, those that are pure-value operators (marked with [*]) can - * probably be left alone (except perhaps [dict get] which is very very - * common) and [dict update] should be considered instead (really big - * win!) - * *---------------------------------------------------------------------- */ @@ -642,18 +865,15 @@ TclCompileDictSetCmd( CompileEnv *envPtr) /* Holds resulting instructions. */ { Tcl_Token *tokenPtr; - int numWords, i; - Proc *procPtr = envPtr->procPtr; + int i, dictVarIndex; DefineLineInformation; /* TIP #280 */ Tcl_Token *varTokenPtr; - int dictVarIndex, nameChars; - const char *name; /* * There must be at least one argument after the command. */ - if (parsePtr->numWords < 4 || procPtr == NULL) { + if (parsePtr->numWords < 4) { return TCL_ERROR; } @@ -664,23 +884,17 @@ TclCompileDictSetCmd( */ varTokenPtr = TokenAfter(parsePtr->tokenPtr); - if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } - name = varTokenPtr[1].start; - nameChars = varTokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { + dictVarIndex = LocalScalarFromToken(varTokenPtr, envPtr); + if (dictVarIndex < 0) { return TCL_ERROR; } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); /* * Remaining words (key path and value to set) can be handled normally. */ tokenPtr = TokenAfter(varTokenPtr); - numWords = parsePtr->numWords-1; - for (i=1 ; i<numWords ; i++) { + for (i=2 ; i< parsePtr->numWords ; i++) { CompileWord(envPtr, tokenPtr, interp, i); tokenPtr = TokenAfter(tokenPtr); } @@ -689,8 +903,9 @@ TclCompileDictSetCmd( * Now emit the instruction to do the dict manipulation. */ - TclEmitInstInt4( INST_DICT_SET, numWords-2, envPtr); + TclEmitInstInt4( INST_DICT_SET, parsePtr->numWords-3, envPtr); TclEmitInt4( dictVarIndex, envPtr); + TclAdjustStackDepth(-1, envPtr); return TCL_OK; } @@ -703,17 +918,15 @@ TclCompileDictIncrCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *varTokenPtr, *keyTokenPtr; - int dictVarIndex, nameChars, incrAmount; - const char *name; + int dictVarIndex, incrAmount; /* * There must be at least two arguments after the command. */ - if (parsePtr->numWords < 3 || parsePtr->numWords > 4 || procPtr == NULL) { + if (parsePtr->numWords < 3 || parsePtr->numWords > 4) { return TCL_ERROR; } varTokenPtr = TokenAfter(parsePtr->tokenPtr); @@ -731,7 +944,7 @@ TclCompileDictIncrCmd( incrTokenPtr = TokenAfter(keyTokenPtr); if (incrTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; + return TclCompileBasic2Or3ArgCmd(interp, parsePtr,cmdPtr, envPtr); } word = incrTokenPtr[1].start; numBytes = incrTokenPtr[1].size; @@ -741,7 +954,7 @@ TclCompileDictIncrCmd( code = TclGetIntFromObj(NULL, intObj, &incrAmount); TclDecrRefCount(intObj); if (code != TCL_OK) { - return TCL_ERROR; + return TclCompileBasic2Or3ArgCmd(interp, parsePtr,cmdPtr, envPtr); } } else { incrAmount = 1; @@ -753,21 +966,16 @@ TclCompileDictIncrCmd( * discover what the index is. */ - if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; + dictVarIndex = LocalScalarFromToken(varTokenPtr, envPtr); + if (dictVarIndex < 0) { + return TclCompileBasic2Or3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } - name = varTokenPtr[1].start; - nameChars = varTokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { - return TCL_ERROR; - } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); /* * Emit the key and the code to actually do the increment. */ - CompileWord(envPtr, keyTokenPtr, interp, 3); + CompileWord(envPtr, keyTokenPtr, interp, 2); TclEmitInstInt4( INST_DICT_INCR_IMM, incrAmount, envPtr); TclEmitInt4( dictVarIndex, envPtr); return TCL_OK; @@ -783,7 +991,7 @@ TclCompileDictGetCmd( CompileEnv *envPtr) /* Holds resulting instructions. */ { Tcl_Token *tokenPtr; - int numWords, i; + int i; DefineLineInformation; /* TIP #280 */ /* @@ -791,21 +999,319 @@ TclCompileDictGetCmd( * case is legal, but too special and magic for us to deal with here). */ + /* TODO: Consider support for compiling expanded args. */ if (parsePtr->numWords < 3) { return TCL_ERROR; } tokenPtr = TokenAfter(parsePtr->tokenPtr); - numWords = parsePtr->numWords-1; /* * Only compile this because we need INST_DICT_GET anyway. */ - for (i=0 ; i<numWords ; i++) { + for (i=1 ; i<parsePtr->numWords ; i++) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + } + TclEmitInstInt4(INST_DICT_GET, parsePtr->numWords-2, envPtr); + TclAdjustStackDepth(-1, envPtr); + return TCL_OK; +} + +int +TclCompileDictExistsCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + Tcl_Token *tokenPtr; + int i; + DefineLineInformation; /* TIP #280 */ + + /* + * There must be at least two arguments after the command (the single-arg + * case is legal, but too special and magic for us to deal with here). + */ + + /* TODO: Consider support for compiling expanded args. */ + if (parsePtr->numWords < 3) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(parsePtr->tokenPtr); + + /* + * Now we do the code generation. + */ + + for (i=1 ; i<parsePtr->numWords ; i++) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + } + TclEmitInstInt4(INST_DICT_EXISTS, parsePtr->numWords-2, envPtr); + TclAdjustStackDepth(-1, envPtr); + return TCL_OK; +} + +int +TclCompileDictUnsetCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + Tcl_Token *tokenPtr; + DefineLineInformation; /* TIP #280 */ + int i, dictVarIndex; + + /* + * There must be at least one argument after the variable name for us to + * compile to bytecode. + */ + + /* TODO: Consider support for compiling expanded args. */ + if (parsePtr->numWords < 3) { + return TCL_ERROR; + } + + /* + * The dictionary variable must be a local scalar that is knowable at + * compile time; anything else exceeds the complexity of the opcode. So + * discover what the index is. + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + dictVarIndex = LocalScalarFromToken(tokenPtr, envPtr); + if (dictVarIndex < 0) { + return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } + + /* + * Remaining words (the key path) can be handled normally. + */ + + for (i=2 ; i<parsePtr->numWords ; i++) { + tokenPtr = TokenAfter(tokenPtr); CompileWord(envPtr, tokenPtr, interp, i); + } + + /* + * Now emit the instruction to do the dict manipulation. + */ + + TclEmitInstInt4( INST_DICT_UNSET, parsePtr->numWords-2, envPtr); + TclEmitInt4( dictVarIndex, envPtr); + return TCL_OK; +} + +int +TclCompileDictCreateCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + int worker; /* Temp var for building the value in. */ + Tcl_Token *tokenPtr; + Tcl_Obj *keyObj, *valueObj, *dictObj; + const char *bytes; + int i, len; + + if ((parsePtr->numWords & 1) == 0) { + return TCL_ERROR; + } + + /* + * See if we can build the value at compile time... + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + dictObj = Tcl_NewObj(); + Tcl_IncrRefCount(dictObj); + for (i=1 ; i<parsePtr->numWords ; i+=2) { + keyObj = Tcl_NewObj(); + Tcl_IncrRefCount(keyObj); + if (!TclWordKnownAtCompileTime(tokenPtr, keyObj)) { + Tcl_DecrRefCount(keyObj); + Tcl_DecrRefCount(dictObj); + goto nonConstant; + } + tokenPtr = TokenAfter(tokenPtr); + valueObj = Tcl_NewObj(); + Tcl_IncrRefCount(valueObj); + if (!TclWordKnownAtCompileTime(tokenPtr, valueObj)) { + Tcl_DecrRefCount(keyObj); + Tcl_DecrRefCount(valueObj); + Tcl_DecrRefCount(dictObj); + goto nonConstant; + } tokenPtr = TokenAfter(tokenPtr); + Tcl_DictObjPut(NULL, dictObj, keyObj, valueObj); + Tcl_DecrRefCount(keyObj); + Tcl_DecrRefCount(valueObj); + } + + /* + * We did! Excellent. The "verifyDict" is to do type forcing. + */ + + bytes = Tcl_GetStringFromObj(dictObj, &len); + PushLiteral(envPtr, bytes, len); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_DICT_VERIFY, envPtr); + Tcl_DecrRefCount(dictObj); + return TCL_OK; + + /* + * Otherwise, we've got to issue runtime code to do the building, which we + * do by [dict set]ting into an unnamed local variable. This requires that + * we are in a context with an LVT. + */ + + nonConstant: + worker = AnonymousLocal(envPtr); + if (worker < 0) { + return TclCompileBasicMin0ArgCmd(interp, parsePtr, cmdPtr, envPtr); } - TclEmitInstInt4(INST_DICT_GET, numWords-1, envPtr); + + PushStringLiteral(envPtr, ""); + Emit14Inst( INST_STORE_SCALAR, worker, envPtr); + TclEmitOpcode( INST_POP, envPtr); + tokenPtr = TokenAfter(parsePtr->tokenPtr); + for (i=1 ; i<parsePtr->numWords ; i+=2) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, i+1); + tokenPtr = TokenAfter(tokenPtr); + TclEmitInstInt4( INST_DICT_SET, 1, envPtr); + TclEmitInt4( worker, envPtr); + TclAdjustStackDepth(-1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + Emit14Inst( INST_LOAD_SCALAR, worker, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( worker, envPtr); + return TCL_OK; +} + +int +TclCompileDictMergeCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr; + int i, workerIndex, infoIndex, outLoop; + + /* + * Deal with some special edge cases. Note that in the case with one + * argument, the only thing to do is to verify the dict-ness. + */ + + /* TODO: Consider support for compiling expanded args. (less likely) */ + if (parsePtr->numWords < 2) { + PushStringLiteral(envPtr, ""); + return TCL_OK; + } else if (parsePtr->numWords == 2) { + tokenPtr = TokenAfter(parsePtr->tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_DICT_VERIFY, envPtr); + return TCL_OK; + } + + /* + * There's real merging work to do. + * + * Allocate some working space. This means we'll only ever compile this + * command when there's an LVT present. + */ + + workerIndex = AnonymousLocal(envPtr); + if (workerIndex < 0) { + return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } + infoIndex = AnonymousLocal(envPtr); + + /* + * Get the first dictionary and verify that it is so. + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_DICT_VERIFY, envPtr); + Emit14Inst( INST_STORE_SCALAR, workerIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); + + /* + * For each of the remaining dictionaries... + */ + + outLoop = TclCreateExceptRange(CATCH_EXCEPTION_RANGE, envPtr); + TclEmitInstInt4( INST_BEGIN_CATCH4, outLoop, envPtr); + ExceptionRangeStarts(envPtr, outLoop); + for (i=2 ; i<parsePtr->numWords ; i++) { + /* + * Get the dictionary, and merge its pairs into the first dict (using + * a small loop). + */ + + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, i); + TclEmitInstInt4( INST_DICT_FIRST, infoIndex, envPtr); + TclEmitInstInt1( INST_JUMP_TRUE1, 24, envPtr); + TclEmitInstInt4( INST_REVERSE, 2, envPtr); + TclEmitInstInt4( INST_DICT_SET, 1, envPtr); + TclEmitInt4( workerIndex, envPtr); + TclAdjustStackDepth(-1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitInstInt4( INST_DICT_NEXT, infoIndex, envPtr); + TclEmitInstInt1( INST_JUMP_FALSE1, -20, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); + } + ExceptionRangeEnds(envPtr, outLoop); + TclEmitOpcode( INST_END_CATCH, envPtr); + + /* + * Clean up any state left over. + */ + + Emit14Inst( INST_LOAD_SCALAR, workerIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( workerIndex, envPtr); + TclEmitInstInt1( INST_JUMP1, 18, envPtr); + + /* + * If an exception happens when starting to iterate over the second (and + * subsequent) dicts. This is strictly not necessary, but it is nice. + */ + + TclAdjustStackDepth(-1, envPtr); + ExceptionRangeTarget(envPtr, outLoop, catchOffset); + TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); + TclEmitOpcode( INST_PUSH_RESULT, envPtr); + TclEmitOpcode( INST_END_CATCH, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( workerIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); + TclEmitOpcode( INST_RETURN_STK, envPtr); + return TCL_OK; } @@ -818,24 +1324,51 @@ TclCompileDictForCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; + return CompileDictEachCmd(interp, parsePtr, cmdPtr, envPtr, + TCL_EACH_KEEP_NONE); +} + +int +TclCompileDictMapCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + return CompileDictEachCmd(interp, parsePtr, cmdPtr, envPtr, + TCL_EACH_COLLECT); +} + +int +CompileDictEachCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr, /* Holds resulting instructions. */ + int collect) /* Flag == TCL_EACH_COLLECT to collect and + * construct a new dictionary with the loop + * body result. */ +{ DefineLineInformation; /* TIP #280 */ Tcl_Token *varsTokenPtr, *dictTokenPtr, *bodyTokenPtr; int keyVarIndex, valueVarIndex, nameChars, loopRange, catchRange; int infoIndex, jumpDisplacement, bodyTargetOffset, emptyTargetOffset; int numVars, endTargetOffset; - int savedStackDepth = envPtr->currStackDepth; - /* Needed because jumps confuse the stack - * space calculator. */ + int collectVar = -1; /* Index of temp var holding the result + * dict. */ const char **argv; Tcl_DString buffer; /* - * There must be at least three argument after the command. + * There must be three arguments after the command. */ - if (parsePtr->numWords != 4 || procPtr == NULL) { - return TCL_ERROR; + if (parsePtr->numWords != 4) { + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } varsTokenPtr = TokenAfter(parsePtr->tokenPtr); @@ -843,7 +1376,19 @@ TclCompileDictForCmd( bodyTokenPtr = TokenAfter(dictTokenPtr); if (varsTokenPtr->type != TCL_TOKEN_SIMPLE_WORD || bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } + + /* + * Create temporary variable to capture return values from loop body when + * we're collecting results. + */ + + if (collect == TCL_EACH_COLLECT) { + collectVar = AnonymousLocal(envPtr); + if (collectVar < 0) { + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } } /* @@ -852,32 +1397,27 @@ TclCompileDictForCmd( */ Tcl_DStringInit(&buffer); - Tcl_DStringAppend(&buffer, varsTokenPtr[1].start, varsTokenPtr[1].size); + TclDStringAppendToken(&buffer, &varsTokenPtr[1]); if (Tcl_SplitList(NULL, Tcl_DStringValue(&buffer), &numVars, &argv) != TCL_OK) { Tcl_DStringFree(&buffer); - return TCL_ERROR; + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } Tcl_DStringFree(&buffer); if (numVars != 2) { - ckfree((char *) argv); - return TCL_ERROR; + ckfree(argv); + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } nameChars = strlen(argv[0]); - if (!TclIsLocalScalar(argv[0], nameChars)) { - ckfree((char *) argv); - return TCL_ERROR; - } - keyVarIndex = TclFindCompiledLocal(argv[0], nameChars, 1, procPtr); - + keyVarIndex = LocalScalar(argv[0], nameChars, envPtr); nameChars = strlen(argv[1]); - if (!TclIsLocalScalar(argv[1], nameChars)) { - ckfree((char *) argv); - return TCL_ERROR; + valueVarIndex = LocalScalar(argv[1], nameChars, envPtr); + ckfree(argv); + + if ((keyVarIndex < 0) || (valueVarIndex < 0)) { + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } - valueVarIndex = TclFindCompiledLocal(argv[1], nameChars, 1, procPtr); - ckfree((char *) argv); /* * Allocate a temporary variable to store the iterator reference. The @@ -886,54 +1426,75 @@ TclCompileDictForCmd( * (at which point it should also have been finished with). */ - infoIndex = TclFindCompiledLocal(NULL, 0, 1, procPtr); + infoIndex = AnonymousLocal(envPtr); + if (infoIndex < 0) { + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } /* * Preparation complete; issue instructions. Note that this code issues * fixed-sized jumps. That simplifies things a lot! * - * First up, get the dictionary and start the iteration. No catching of - * errors at this point. + * First up, initialize the accumulator dictionary if needed. */ - CompileWord(envPtr, dictTokenPtr, interp, 3); - TclEmitInstInt4( INST_DICT_FIRST, infoIndex, envPtr); - emptyTargetOffset = CurrentOffset(envPtr); - TclEmitInstInt4( INST_JUMP_TRUE4, 0, envPtr); + if (collect == TCL_EACH_COLLECT) { + PushStringLiteral(envPtr, ""); + Emit14Inst( INST_STORE_SCALAR, collectVar, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + + /* + * Get the dictionary and start the iteration. No catching of errors at + * this point. + */ + + CompileWord(envPtr, dictTokenPtr, interp, 2); /* * Now we catch errors from here on so that we can finalize the search * started by Tcl_DictObjFirst above. */ - catchRange = DeclareExceptionRange(envPtr, CATCH_EXCEPTION_RANGE); - TclEmitInstInt4( INST_BEGIN_CATCH4, catchRange, envPtr); + catchRange = TclCreateExceptRange(CATCH_EXCEPTION_RANGE, envPtr); + TclEmitInstInt4( INST_BEGIN_CATCH4, catchRange, envPtr); ExceptionRangeStarts(envPtr, catchRange); + TclEmitInstInt4( INST_DICT_FIRST, infoIndex, envPtr); + emptyTargetOffset = CurrentOffset(envPtr); + TclEmitInstInt4( INST_JUMP_TRUE4, 0, envPtr); + /* * Inside the iteration, write the loop variables. */ bodyTargetOffset = CurrentOffset(envPtr); - TclEmitInstInt4( INST_STORE_SCALAR4, keyVarIndex, envPtr); - TclEmitOpcode( INST_POP, envPtr); - TclEmitInstInt4( INST_STORE_SCALAR4, valueVarIndex, envPtr); - TclEmitOpcode( INST_POP, envPtr); + Emit14Inst( INST_STORE_SCALAR, keyVarIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); + Emit14Inst( INST_STORE_SCALAR, valueVarIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); /* * Set up the loop exception targets. */ - loopRange = DeclareExceptionRange(envPtr, LOOP_EXCEPTION_RANGE); + loopRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); ExceptionRangeStarts(envPtr, loopRange); /* * Compile the loop body itself. It should be stack-neutral. */ - SetLineInformation (4); - CompileBody(envPtr, bodyTokenPtr, interp); - TclEmitOpcode( INST_POP, envPtr); + BODY(bodyTokenPtr, 3); + if (collect == TCL_EACH_COLLECT) { + Emit14Inst( INST_LOAD_SCALAR, keyVarIndex, envPtr); + TclEmitInstInt4(INST_OVER, 1, envPtr); + TclEmitInstInt4(INST_DICT_SET, 1, envPtr); + TclEmitInt4( collectVar, envPtr); + TclAdjustStackDepth(-1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + TclEmitOpcode( INST_POP, envPtr); /* * Both exception target ranges (error and loop) end here. @@ -949,37 +1510,29 @@ TclCompileDictForCmd( */ ExceptionRangeTarget(envPtr, loopRange, continueOffset); - TclEmitInstInt4( INST_DICT_NEXT, infoIndex, envPtr); + TclEmitInstInt4( INST_DICT_NEXT, infoIndex, envPtr); jumpDisplacement = bodyTargetOffset - CurrentOffset(envPtr); - TclEmitInstInt4( INST_JUMP_FALSE4, jumpDisplacement, envPtr); - TclEmitOpcode( INST_POP, envPtr); - TclEmitOpcode( INST_POP, envPtr); - - /* - * Now do the final cleanup for the no-error case (this is where we break - * out of the loop to) by force-terminating the iteration (if not already - * terminated), ditching the exception info and jumping to the last - * instruction for this command. In theory, this could be done using the - * "finally" clause (next generated) but this is faster. - */ - - ExceptionRangeTarget(envPtr, loopRange, breakOffset); - TclEmitInstInt4( INST_DICT_DONE, infoIndex, envPtr); - TclEmitOpcode( INST_END_CATCH, envPtr); + TclEmitInstInt4( INST_JUMP_FALSE4, jumpDisplacement, envPtr); endTargetOffset = CurrentOffset(envPtr); - TclEmitInstInt4( INST_JUMP4, 0, envPtr); + TclEmitInstInt1( INST_JUMP1, 0, envPtr); /* * Error handler "finally" clause, which force-terminates the iteration * and rethrows the error. */ + TclAdjustStackDepth(-1, envPtr); ExceptionRangeTarget(envPtr, catchRange, catchOffset); - TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); - TclEmitOpcode( INST_PUSH_RESULT, envPtr); - TclEmitInstInt4( INST_DICT_DONE, infoIndex, envPtr); - TclEmitOpcode( INST_END_CATCH, envPtr); - TclEmitOpcode( INST_RETURN_STK, envPtr); + TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); + TclEmitOpcode( INST_PUSH_RESULT, envPtr); + TclEmitOpcode( INST_END_CATCH, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); + if (collect == TCL_EACH_COLLECT) { + TclEmitInstInt1(INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( collectVar, envPtr); + } + TclEmitOpcode( INST_RETURN_STK, envPtr); /* * Otherwise we're done (the jump after the DICT_FIRST points here) and we @@ -987,24 +1540,33 @@ TclCompileDictForCmd( * easy!) Note that we skip the END_CATCH. [Bug 1382528] */ - envPtr->currStackDepth = savedStackDepth+2; jumpDisplacement = CurrentOffset(envPtr) - emptyTargetOffset; TclUpdateInstInt4AtPc(INST_JUMP_TRUE4, jumpDisplacement, envPtr->codeStart + emptyTargetOffset); - TclEmitOpcode( INST_POP, envPtr); - TclEmitOpcode( INST_POP, envPtr); - TclEmitInstInt4( INST_DICT_DONE, infoIndex, envPtr); + jumpDisplacement = CurrentOffset(envPtr) - endTargetOffset; + TclUpdateInstInt1AtPc(INST_JUMP1, jumpDisplacement, + envPtr->codeStart + endTargetOffset); + TclEmitOpcode( INST_POP, envPtr); + TclEmitOpcode( INST_POP, envPtr); + ExceptionRangeTarget(envPtr, loopRange, breakOffset); + TclFinalizeLoopExceptionRange(envPtr, loopRange); + TclEmitOpcode( INST_END_CATCH, envPtr); /* * Final stage of the command (normal case) is that we push an empty - * object. This is done last to promote peephole optimization when it's - * dropped immediately. + * object (or push the accumulator as the result object). This is done + * last to promote peephole optimization when it's dropped immediately. */ - jumpDisplacement = CurrentOffset(envPtr) - endTargetOffset; - TclUpdateInstInt4AtPc(INST_JUMP4, jumpDisplacement, - envPtr->codeStart + endTargetOffset); - PushLiteral(envPtr, "", 0); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); + if (collect == TCL_EACH_COLLECT) { + Emit14Inst( INST_LOAD_SCALAR, collectVar, envPtr); + TclEmitInstInt1(INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( collectVar, envPtr); + } else { + PushStringLiteral(envPtr, ""); + } return TCL_OK; } @@ -1017,10 +1579,8 @@ TclCompileDictUpdateCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ - const char *name; - int i, nameChars, dictIndex, numVars, range, infoIndex; + int i, dictIndex, numVars, range, infoIndex; Tcl_Token **keyTokenPtrs, *dictVarTokenPtr, *bodyTokenPtr, *tokenPtr; DictUpdateInfo *duiPtr; JumpFixup jumpFixup; @@ -1029,7 +1589,7 @@ TclCompileDictUpdateCmd( * There must be at least one argument after the command. */ - if (parsePtr->numWords < 5 || procPtr == NULL) { + if (parsePtr->numWords < 5) { return TCL_ERROR; } @@ -1050,15 +1610,10 @@ TclCompileDictUpdateCmd( */ dictVarTokenPtr = TokenAfter(parsePtr->tokenPtr); - if (dictVarTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } - name = dictVarTokenPtr[1].start; - nameChars = dictVarTokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { - return TCL_ERROR; + dictIndex = LocalScalarFromToken(dictVarTokenPtr, envPtr); + if (dictIndex < 0) { + goto issueFallback; } - dictIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); /* * Assemble the instruction metadata. This is complex enough that it is @@ -1066,11 +1621,9 @@ TclCompileDictUpdateCmd( * that are to be used. */ - duiPtr = (DictUpdateInfo *) - ckalloc(sizeof(DictUpdateInfo) + sizeof(int) * (numVars - 1)); + duiPtr = ckalloc(sizeof(DictUpdateInfo) + sizeof(int) * (numVars - 1)); duiPtr->length = numVars; - keyTokenPtrs = (Tcl_Token **) TclStackAlloc(interp, - sizeof(Tcl_Token *) * numVars); + keyTokenPtrs = TclStackAlloc(interp, sizeof(Tcl_Token *) * numVars); tokenPtr = TokenAfter(dictVarTokenPtr); for (i=0 ; i<numVars ; i++) { @@ -1079,37 +1632,21 @@ TclCompileDictUpdateCmd( */ keyTokenPtrs[i] = tokenPtr; - - /* - * Variables first need to be checked for sanity. - */ - tokenPtr = TokenAfter(tokenPtr); - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - ckfree((char *) duiPtr); - TclStackFree(interp, keyTokenPtrs); - return TCL_ERROR; - } - name = tokenPtr[1].start; - nameChars = tokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { - ckfree((char *) duiPtr); - TclStackFree(interp, keyTokenPtrs); - return TCL_ERROR; - } /* - * Stash the index in the auxiliary data. + * Stash the index in the auxiliary data (if it is indeed a local + * scalar that is resolvable at compile-time). */ - duiPtr->varIndices[i] = - TclFindCompiledLocal(name, nameChars, 1, procPtr); + duiPtr->varIndices[i] = LocalScalarFromToken(tokenPtr, envPtr); + if (duiPtr->varIndices[i] < 0) { + goto failedUpdateInfoAssembly; + } tokenPtr = TokenAfter(tokenPtr); } if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - ckfree((char *) duiPtr); - TclStackFree(interp, keyTokenPtrs); - return TCL_ERROR; + goto failedUpdateInfoAssembly; } bodyTokenPtr = tokenPtr; @@ -1121,17 +1658,17 @@ TclCompileDictUpdateCmd( infoIndex = TclCreateAuxData(duiPtr, &tclDictUpdateInfoType, envPtr); for (i=0 ; i<numVars ; i++) { - CompileWord(envPtr, keyTokenPtrs[i], interp, i); + CompileWord(envPtr, keyTokenPtrs[i], interp, 2*i+2); } - TclEmitInstInt4( INST_LIST, numVars, envPtr); - TclEmitInstInt4( INST_DICT_UPDATE_START, dictIndex, envPtr); - TclEmitInt4( infoIndex, envPtr); + TclEmitInstInt4( INST_LIST, numVars, envPtr); + TclEmitInstInt4( INST_DICT_UPDATE_START, dictIndex, envPtr); + TclEmitInt4( infoIndex, envPtr); - range = DeclareExceptionRange(envPtr, CATCH_EXCEPTION_RANGE); - TclEmitInstInt4( INST_BEGIN_CATCH4, range, envPtr); + range = TclCreateExceptRange(CATCH_EXCEPTION_RANGE, envPtr); + TclEmitInstInt4( INST_BEGIN_CATCH4, range, envPtr); ExceptionRangeStarts(envPtr, range); - CompileBody(envPtr, bodyTokenPtr, interp); + BODY(bodyTokenPtr, parsePtr->numWords - 1); ExceptionRangeEnds(envPtr, range); /* @@ -1139,10 +1676,10 @@ TclCompileDictUpdateCmd( * the body evaluation: swap them and finish the update code. */ - TclEmitOpcode( INST_END_CATCH, envPtr); - TclEmitInstInt4( INST_REVERSE, 2, envPtr); - TclEmitInstInt4( INST_DICT_UPDATE_END, dictIndex, envPtr); - TclEmitInt4( infoIndex, envPtr); + TclEmitOpcode( INST_END_CATCH, envPtr); + TclEmitInstInt4( INST_REVERSE, 2, envPtr); + TclEmitInstInt4( INST_DICT_UPDATE_END, dictIndex, envPtr); + TclEmitInt4( infoIndex, envPtr); /* * Jump around the exceptional termination code. @@ -1157,21 +1694,31 @@ TclCompileDictUpdateCmd( */ ExceptionRangeTarget(envPtr, range, catchOffset); - TclEmitOpcode( INST_PUSH_RESULT, envPtr); - TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); - TclEmitOpcode( INST_END_CATCH, envPtr); - TclEmitInstInt4( INST_REVERSE, 3, envPtr); + TclEmitOpcode( INST_PUSH_RESULT, envPtr); + TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); + TclEmitOpcode( INST_END_CATCH, envPtr); + TclEmitInstInt4( INST_REVERSE, 3, envPtr); - TclEmitInstInt4( INST_DICT_UPDATE_END, dictIndex, envPtr); - TclEmitInt4( infoIndex, envPtr); - TclEmitOpcode( INST_RETURN_STK, envPtr); + TclEmitInstInt4( INST_DICT_UPDATE_END, dictIndex, envPtr); + TclEmitInt4( infoIndex, envPtr); + TclEmitInvoke(envPtr,INST_RETURN_STK); if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) { Tcl_Panic("TclCompileDictCmd(update): bad jump distance %d", - CurrentOffset(envPtr) - jumpFixup.codeOffset); + (int) (CurrentOffset(envPtr) - jumpFixup.codeOffset)); } TclStackFree(interp, keyTokenPtrs); return TCL_OK; + + /* + * Clean up after a failure to create the DictUpdateInfo structure. + */ + + failedUpdateInfoAssembly: + ckfree(duiPtr); + TclStackFree(interp, keyTokenPtrs); + issueFallback: + return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr); } int @@ -1183,7 +1730,6 @@ TclCompileDictAppendCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; int i, dictVarIndex; @@ -1194,7 +1740,8 @@ TclCompileDictAppendCmd( * speed quite so much. ;-) */ - if (parsePtr->numWords<4 || parsePtr->numWords>100 || procPtr==NULL) { + /* TODO: Consider support for compiling expanded args. */ + if (parsePtr->numWords<4 || parsePtr->numWords>100) { return TCL_ERROR; } @@ -1203,16 +1750,9 @@ TclCompileDictAppendCmd( */ tokenPtr = TokenAfter(parsePtr->tokenPtr); - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } else { - register const char *name = tokenPtr[1].start; - register int nameChars = tokenPtr[1].size; - - if (!TclIsLocalScalar(name, nameChars)) { - return TCL_ERROR; - } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); + dictVarIndex = LocalScalarFromToken(tokenPtr, envPtr); + if (dictVarIndex < 0) { + return TclCompileBasicMin2ArgCmd(interp, parsePtr,cmdPtr, envPtr); } /* @@ -1225,7 +1765,7 @@ TclCompileDictAppendCmd( tokenPtr = TokenAfter(tokenPtr); } if (parsePtr->numWords > 4) { - TclEmitInstInt1(INST_CONCAT1, parsePtr->numWords-3, envPtr); + TclEmitInstInt1(INST_STR_CONCAT1, parsePtr->numWords-3, envPtr); } /* @@ -1245,35 +1785,290 @@ TclCompileDictLappendCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *varTokenPtr, *keyTokenPtr, *valueTokenPtr; - int dictVarIndex, nameChars; - const char *name; + int dictVarIndex; /* * There must be three arguments after the command. */ - if (parsePtr->numWords != 4 || procPtr == NULL) { + /* TODO: Consider support for compiling expanded args. */ + /* Probably not. Why is INST_DICT_LAPPEND limited to one value? */ + if (parsePtr->numWords != 4) { return TCL_ERROR; } + /* + * Parse the arguments. + */ + varTokenPtr = TokenAfter(parsePtr->tokenPtr); keyTokenPtr = TokenAfter(varTokenPtr); valueTokenPtr = TokenAfter(keyTokenPtr); - if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; + dictVarIndex = LocalScalarFromToken(varTokenPtr, envPtr); + if (dictVarIndex < 0) { + return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } - name = varTokenPtr[1].start; - nameChars = varTokenPtr[1].size; - if (!TclIsLocalScalar(name, nameChars)) { + + /* + * Issue the implementation. + */ + + CompileWord(envPtr, keyTokenPtr, interp, 2); + CompileWord(envPtr, valueTokenPtr, interp, 3); + TclEmitInstInt4( INST_DICT_LAPPEND, dictVarIndex, envPtr); + return TCL_OK; +} + +int +TclCompileDictWithCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + int i, range, varNameTmp = -1, pathTmp = -1, keysTmp, gotPath; + int dictVar, bodyIsEmpty = 1; + Tcl_Token *varTokenPtr, *tokenPtr; + JumpFixup jumpFixup; + const char *ptr, *end; + + /* + * There must be at least one argument after the command. + */ + + /* TODO: Consider support for compiling expanded args. */ + if (parsePtr->numWords < 3) { return TCL_ERROR; } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); - CompileWord(envPtr, keyTokenPtr, interp, 3); - CompileWord(envPtr, valueTokenPtr, interp, 4); - TclEmitInstInt4( INST_DICT_LAPPEND, dictVarIndex, envPtr); + + /* + * Parse the command (trivially). Expect the following: + * dict with <any (varName)> ?<any> ...? <literal> + */ + + varTokenPtr = TokenAfter(parsePtr->tokenPtr); + tokenPtr = TokenAfter(varTokenPtr); + for (i=3 ; i<parsePtr->numWords ; i++) { + tokenPtr = TokenAfter(tokenPtr); + } + if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { + return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr); + } + + /* + * Test if the last word is an empty script; if so, we can compile it in + * all cases, but if it is non-empty we need local variable table entries + * to hold the temporary variables (used to keep stack usage simple). + */ + + for (ptr=tokenPtr[1].start,end=ptr+tokenPtr[1].size ; ptr!=end ; ptr++) { + if (*ptr!=' ' && *ptr!='\t' && *ptr!='\n' && *ptr!='\r') { + if (envPtr->procPtr == NULL) { + return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, + envPtr); + } + bodyIsEmpty = 0; + break; + } + } + + /* + * Determine if we're manipulating a dict in a simple local variable. + */ + + gotPath = (parsePtr->numWords > 3); + dictVar = LocalScalarFromToken(varTokenPtr, envPtr); + + /* + * Special case: an empty body means we definitely have no need to issue + * try-finally style code or to allocate local variable table entries for + * storing temporaries. Still need to do both INST_DICT_EXPAND and + * INST_DICT_RECOMBINE_* though, because we can't determine if we're free + * of traces. + */ + + if (bodyIsEmpty) { + if (dictVar >= 0) { + if (gotPath) { + /* + * Case: Path into dict in LVT with empty body. + */ + + tokenPtr = TokenAfter(varTokenPtr); + for (i=2 ; i<parsePtr->numWords-1 ; i++) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + } + TclEmitInstInt4(INST_LIST, parsePtr->numWords-3,envPtr); + Emit14Inst( INST_LOAD_SCALAR, dictVar, envPtr); + TclEmitInstInt4(INST_OVER, 1, envPtr); + TclEmitOpcode( INST_DICT_EXPAND, envPtr); + TclEmitInstInt4(INST_DICT_RECOMBINE_IMM, dictVar, envPtr); + } else { + /* + * Case: Direct dict in LVT with empty body. + */ + + PushStringLiteral(envPtr, ""); + Emit14Inst( INST_LOAD_SCALAR, dictVar, envPtr); + PushStringLiteral(envPtr, ""); + TclEmitOpcode( INST_DICT_EXPAND, envPtr); + TclEmitInstInt4(INST_DICT_RECOMBINE_IMM, dictVar, envPtr); + } + } else { + if (gotPath) { + /* + * Case: Path into dict in non-simple var with empty body. + */ + + tokenPtr = varTokenPtr; + for (i=1 ; i<parsePtr->numWords-1 ; i++) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + } + TclEmitInstInt4(INST_LIST, parsePtr->numWords-3,envPtr); + TclEmitInstInt4(INST_OVER, 1, envPtr); + TclEmitOpcode( INST_LOAD_STK, envPtr); + TclEmitInstInt4(INST_OVER, 1, envPtr); + TclEmitOpcode( INST_DICT_EXPAND, envPtr); + TclEmitOpcode( INST_DICT_RECOMBINE_STK, envPtr); + } else { + /* + * Case: Direct dict in non-simple var with empty body. + */ + + CompileWord(envPtr, varTokenPtr, interp, 1); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_LOAD_STK, envPtr); + PushStringLiteral(envPtr, ""); + TclEmitOpcode( INST_DICT_EXPAND, envPtr); + PushStringLiteral(envPtr, ""); + TclEmitInstInt4(INST_REVERSE, 2, envPtr); + TclEmitOpcode( INST_DICT_RECOMBINE_STK, envPtr); + } + } + PushStringLiteral(envPtr, ""); + return TCL_OK; + } + + /* + * OK, we have a non-trivial body. This means that the focus is on + * generating a try-finally structure where the INST_DICT_RECOMBINE_* goes + * in the 'finally' clause. + * + * Start by allocating local (unnamed, untraced) working variables. + */ + + if (dictVar == -1) { + varNameTmp = AnonymousLocal(envPtr); + } + if (gotPath) { + pathTmp = AnonymousLocal(envPtr); + } + keysTmp = AnonymousLocal(envPtr); + + /* + * Issue instructions. First, the part to expand the dictionary. + */ + + if (dictVar == -1) { + CompileWord(envPtr, varTokenPtr, interp, 1); + Emit14Inst( INST_STORE_SCALAR, varNameTmp, envPtr); + } + tokenPtr = TokenAfter(varTokenPtr); + if (gotPath) { + for (i=2 ; i<parsePtr->numWords-1 ; i++) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + } + TclEmitInstInt4( INST_LIST, parsePtr->numWords-3,envPtr); + Emit14Inst( INST_STORE_SCALAR, pathTmp, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + if (dictVar == -1) { + TclEmitOpcode( INST_LOAD_STK, envPtr); + } else { + Emit14Inst( INST_LOAD_SCALAR, dictVar, envPtr); + } + if (gotPath) { + Emit14Inst( INST_LOAD_SCALAR, pathTmp, envPtr); + } else { + PushStringLiteral(envPtr, ""); + } + TclEmitOpcode( INST_DICT_EXPAND, envPtr); + Emit14Inst( INST_STORE_SCALAR, keysTmp, envPtr); + TclEmitOpcode( INST_POP, envPtr); + + /* + * Now the body of the [dict with]. + */ + + range = TclCreateExceptRange(CATCH_EXCEPTION_RANGE, envPtr); + TclEmitInstInt4( INST_BEGIN_CATCH4, range, envPtr); + + ExceptionRangeStarts(envPtr, range); + BODY(tokenPtr, parsePtr->numWords - 1); + ExceptionRangeEnds(envPtr, range); + + /* + * Now fold the results back into the dictionary in the OK case. + */ + + TclEmitOpcode( INST_END_CATCH, envPtr); + if (dictVar == -1) { + Emit14Inst( INST_LOAD_SCALAR, varNameTmp, envPtr); + } + if (gotPath) { + Emit14Inst( INST_LOAD_SCALAR, pathTmp, envPtr); + } else { + PushStringLiteral(envPtr, ""); + } + Emit14Inst( INST_LOAD_SCALAR, keysTmp, envPtr); + if (dictVar == -1) { + TclEmitOpcode( INST_DICT_RECOMBINE_STK, envPtr); + } else { + TclEmitInstInt4( INST_DICT_RECOMBINE_IMM, dictVar, envPtr); + } + TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpFixup); + + /* + * Now fold the results back into the dictionary in the exception case. + */ + + TclAdjustStackDepth(-1, envPtr); + ExceptionRangeTarget(envPtr, range, catchOffset); + TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); + TclEmitOpcode( INST_PUSH_RESULT, envPtr); + TclEmitOpcode( INST_END_CATCH, envPtr); + if (dictVar == -1) { + Emit14Inst( INST_LOAD_SCALAR, varNameTmp, envPtr); + } + if (parsePtr->numWords > 3) { + Emit14Inst( INST_LOAD_SCALAR, pathTmp, envPtr); + } else { + PushStringLiteral(envPtr, ""); + } + Emit14Inst( INST_LOAD_SCALAR, keysTmp, envPtr); + if (dictVar == -1) { + TclEmitOpcode( INST_DICT_RECOMBINE_STK, envPtr); + } else { + TclEmitInstInt4( INST_DICT_RECOMBINE_IMM, dictVar, envPtr); + } + TclEmitInvoke(envPtr, INST_RETURN_STK); + + /* + * Prepare for the start of the next command. + */ + + if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) { + Tcl_Panic("TclCompileDictCmd(update): bad jump distance %d", + (int) (CurrentOffset(envPtr) - jumpFixup.codeOffset)); + } return TCL_OK; } @@ -1307,7 +2102,7 @@ DupDictUpdateInfo( dui1Ptr = clientData; len = sizeof(DictUpdateInfo) + sizeof(int) * (dui1Ptr->length - 1); - dui2Ptr = (DictUpdateInfo *) ckalloc(len); + dui2Ptr = ckalloc(len); memcpy(dui2Ptr, dui1Ptr, len); return dui2Ptr; } @@ -1340,13 +2135,87 @@ PrintDictUpdateInfo( /* *---------------------------------------------------------------------- * + * TclCompileErrorCmd -- + * + * Procedure called to compile the "error" command. + * + * Results: + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "error" command at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileErrorCmd( + Tcl_Interp *interp, /* Used for context. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + /* + * General syntax: [error message ?errorInfo? ?errorCode?] + */ + + Tcl_Token *tokenPtr; + DefineLineInformation; /* TIP #280 */ + + if (parsePtr->numWords < 2 || parsePtr->numWords > 4) { + return TCL_ERROR; + } + + /* + * Handle the message. + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 1); + + /* + * Construct the options. Note that -code and -level are not here. + */ + + if (parsePtr->numWords == 2) { + PushStringLiteral(envPtr, ""); + } else { + PushStringLiteral(envPtr, "-errorinfo"); + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 2); + if (parsePtr->numWords == 3) { + TclEmitInstInt4( INST_LIST, 2, envPtr); + } else { + PushStringLiteral(envPtr, "-errorcode"); + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 3); + TclEmitInstInt4( INST_LIST, 4, envPtr); + } + } + + /* + * Issue the error via 'returnImm error 0'. + */ + + TclEmitInstInt4( INST_RETURN_IMM, TCL_ERROR, envPtr); + TclEmitInt4( 0, envPtr); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileExprCmd -- * * Procedure called to compile the "expr" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "expr" command at @@ -1390,8 +2259,8 @@ TclCompileExprCmd( * Procedure called to compile the "for" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "for" command at @@ -1411,9 +2280,8 @@ TclCompileForCmd( { Tcl_Token *startTokenPtr, *testTokenPtr, *nextTokenPtr, *bodyTokenPtr; JumpFixup jumpEvalCondFixup; - int testCodeOffset, bodyCodeOffset, nextCodeOffset, jumpDist; + int bodyCodeOffset, nextCodeOffset, jumpDist; int bodyRange, nextRange; - int savedStackDepth = envPtr->currStackDepth; DefineLineInformation; /* TIP #280 */ if (parsePtr->numWords != 5) { @@ -1445,20 +2313,10 @@ TclCompileForCmd( } /* - * Create ExceptionRange records for the body and the "next" command. The - * "next" command's ExceptionRange supports break but not continue (and - * has a -1 continueOffset). - */ - - bodyRange = DeclareExceptionRange(envPtr, LOOP_EXCEPTION_RANGE); - nextRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); - - /* * Inline compile the initial command. */ - SetLineInformation (1); - CompileBody(envPtr, startTokenPtr, interp); + BODY(startTokenPtr, 1); TclEmitOpcode(INST_POP, envPtr); /* @@ -1479,44 +2337,38 @@ TclCompileForCmd( * Compile the loop body. */ + bodyRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); bodyCodeOffset = ExceptionRangeStarts(envPtr, bodyRange); - SetLineInformation (4); - CompileBody(envPtr, bodyTokenPtr, interp); + BODY(bodyTokenPtr, 4); ExceptionRangeEnds(envPtr, bodyRange); - envPtr->currStackDepth = savedStackDepth + 1; TclEmitOpcode(INST_POP, envPtr); /* - * Compile the "next" subcommand. + * Compile the "next" subcommand. Note that this exception range will not + * have a continueOffset (other than -1) connected to it; it won't trap + * TCL_CONTINUE but rather just TCL_BREAK. */ - envPtr->currStackDepth = savedStackDepth; + nextRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); + envPtr->exceptAuxArrayPtr[nextRange].supportsContinue = 0; nextCodeOffset = ExceptionRangeStarts(envPtr, nextRange); - SetLineInformation (3); - CompileBody(envPtr, nextTokenPtr, interp); + BODY(nextTokenPtr, 3); ExceptionRangeEnds(envPtr, nextRange); - envPtr->currStackDepth = savedStackDepth + 1; TclEmitOpcode(INST_POP, envPtr); - envPtr->currStackDepth = savedStackDepth; /* * Compile the test expression then emit the conditional jump that * terminates the for. */ - testCodeOffset = CurrentOffset(envPtr); - - jumpDist = testCodeOffset - jumpEvalCondFixup.codeOffset; - if (TclFixupForwardJump(envPtr, &jumpEvalCondFixup, jumpDist, 127)) { + if (TclFixupForwardJumpToHere(envPtr, &jumpEvalCondFixup, 127)) { bodyCodeOffset += 3; nextCodeOffset += 3; - testCodeOffset += 3; } - SetLineInformation (2); - envPtr->currStackDepth = savedStackDepth; + SetLineInformation(2); TclCompileExprWords(interp, testTokenPtr, 1, envPtr); - envPtr->currStackDepth = savedStackDepth + 1; + TclClearNumConversion(envPtr); jumpDist = CurrentOffset(envPtr) - bodyCodeOffset; if (jumpDist > 127) { @@ -1537,13 +2389,14 @@ TclCompileForCmd( ExceptionRangeTarget(envPtr, bodyRange, breakOffset); ExceptionRangeTarget(envPtr, nextRange, breakOffset); + TclFinalizeLoopExceptionRange(envPtr, bodyRange); + TclFinalizeLoopExceptionRange(envPtr, nextRange); /* * The for command's result is an empty string. */ - envPtr->currStackDepth = savedStackDepth; - PushLiteral(envPtr, "", 0); + PushStringLiteral(envPtr, ""); return TCL_OK; } @@ -1556,8 +2409,8 @@ TclCompileForCmd( * Procedure called to compile the "foreach" command. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: * Instructions are added to envPtr to execute the "foreach" command at @@ -1575,20 +2428,78 @@ TclCompileForeachCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { + return CompileEachloopCmd(interp, parsePtr, cmdPtr, envPtr, + TCL_EACH_KEEP_NONE); +} + +/* + *---------------------------------------------------------------------- + * + * TclCompileLmapCmd -- + * + * Procedure called to compile the "lmap" command. + * + * Results: + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "lmap" command at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileLmapCmd( + Tcl_Interp *interp, /* Used for error reporting. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + return CompileEachloopCmd(interp, parsePtr, cmdPtr, envPtr, + TCL_EACH_COLLECT); +} + +/* + *---------------------------------------------------------------------- + * + * CompileEachloopCmd -- + * + * Procedure called to compile the "foreach" and "lmap" commands. + * + * Results: + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "foreach" command at + * runtime. + * + *---------------------------------------------------------------------- + */ + +static int +CompileEachloopCmd( + Tcl_Interp *interp, /* Used for error reporting. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr, /* Holds resulting instructions. */ + int collect) /* Select collecting or accumulating mode + * (TCL_EACH_*) */ +{ Proc *procPtr = envPtr->procPtr; ForeachInfo *infoPtr; /* Points to the structure describing this * foreach command. Stored in a AuxData * record in the ByteCode. */ - int firstValueTemp; /* Index of the first temp var in the frame - * used to point to a value list. */ - int loopCtTemp; /* Index of temp var holding the loop's - * iteration count. */ + Tcl_Token *tokenPtr, *bodyTokenPtr; - unsigned char *jumpPc; - JumpFixup jumpFalseFixup; - int jumpBackDist, jumpBackOffset, infoIndex, range, bodyIndex; - int numWords, numLists, numVars, loopIndex, tempVar, i, j, code; - int savedStackDepth = envPtr->currStackDepth; + int jumpBackOffset, infoIndex, range; + int numWords, numLists, numVars, loopIndex, i, j, code; DefineLineInformation; /* TIP #280 */ /* @@ -1627,14 +2538,12 @@ TclCompileForeachCmd( return TCL_ERROR; } - bodyIndex = i-1; - /* * Allocate storage for the varcList and varvList arrays if necessary. */ numLists = (numWords - 2)/2; - varcList = (int *) TclStackAlloc(interp, numLists * sizeof(int)); + varcList = TclStackAlloc(interp, numLists * sizeof(int)); memset(varcList, 0, numLists * sizeof(int)); varvList = (const char ***) TclStackAlloc(interp, numLists * sizeof(const char **)); @@ -1666,8 +2575,8 @@ TclCompileForeachCmd( */ Tcl_DStringInit(&varList); - Tcl_DStringAppend(&varList, tokenPtr[1].start, tokenPtr[1].size); - code = Tcl_SplitList(interp, Tcl_DStringValue(&varList), + TclDStringAppendToken(&varList, &tokenPtr[1]); + code = Tcl_SplitList(NULL, Tcl_DStringValue(&varList), &varcList[loopIndex], &varvList[loopIndex]); Tcl_DStringFree(&varList); if (code != TCL_OK) { @@ -1699,26 +2608,10 @@ TclCompileForeachCmd( } /* - * We will compile the foreach command. Reserve (numLists + 1) temporary - * variables: - * - numLists temps to hold each value list - * - 1 temp for the loop counter (index of next element in each list) - * - * At this time we don't try to reuse temporaries; if there are two - * nonoverlapping foreach loops, they don't share any temps. + * We will compile the foreach command. */ code = TCL_OK; - firstValueTemp = -1; - for (loopIndex = 0; loopIndex < numLists; loopIndex++) { - tempVar = TclFindCompiledLocal(NULL, /*nameChars*/ 0, - /*create*/ 1, procPtr); - if (loopIndex == 0) { - firstValueTemp = tempVar; - } - } - loopCtTemp = TclFindCompiledLocal(NULL, /*nameChars*/ 0, - /*create*/ 1, procPtr); /* * Create and initialize the ForeachInfo and ForeachVarList data @@ -1726,141 +2619,99 @@ TclCompileForeachCmd( * pointing to the ForeachInfo structure. */ - infoPtr = (ForeachInfo *) ckalloc((unsigned) - sizeof(ForeachInfo) + numLists*sizeof(ForeachVarList *)); + infoPtr = ckalloc(sizeof(ForeachInfo) + + (numLists - 1) * sizeof(ForeachVarList *)); infoPtr->numLists = numLists; - infoPtr->firstValueTemp = firstValueTemp; - infoPtr->loopCtTemp = loopCtTemp; for (loopIndex = 0; loopIndex < numLists; loopIndex++) { ForeachVarList *varListPtr; + numVars = varcList[loopIndex]; - varListPtr = (ForeachVarList *) ckalloc((unsigned) - sizeof(ForeachVarList) + numVars*sizeof(int)); + varListPtr = ckalloc(sizeof(ForeachVarList) + + (numVars - 1) * sizeof(int)); varListPtr->numVars = numVars; for (j = 0; j < numVars; j++) { const char *varName = varvList[loopIndex][j]; int nameChars = strlen(varName); varListPtr->varIndexes[j] = TclFindCompiledLocal(varName, - nameChars, /*create*/ 1, procPtr); + nameChars, /*create*/ 1, envPtr); } infoPtr->varLists[loopIndex] = varListPtr; } - infoIndex = TclCreateAuxData(infoPtr, &tclForeachInfoType, envPtr); + infoIndex = TclCreateAuxData(infoPtr, &tclNewForeachInfoType, envPtr); /* - * Create an exception record to handle [break] and [continue]. + * Create the collecting object, unshared. */ - - range = DeclareExceptionRange(envPtr, LOOP_EXCEPTION_RANGE); - + + if (collect == TCL_EACH_COLLECT) { + TclEmitInstInt4(INST_LIST, 0, envPtr); + } + /* - * Evaluate then store each value list in the associated temporary. + * Evaluate each value list and leave it on stack. */ - loopIndex = 0; for (i = 0, tokenPtr = parsePtr->tokenPtr; i < numWords-1; i++, tokenPtr = TokenAfter(tokenPtr)) { if ((i%2 == 0) && (i > 0)) { - SetLineInformation (i); - CompileTokens(envPtr, tokenPtr, interp); - tempVar = (firstValueTemp + loopIndex); - if (tempVar <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, tempVar, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, tempVar, envPtr); - } - TclEmitOpcode(INST_POP, envPtr); - loopIndex++; + CompileWord(envPtr, tokenPtr, interp, i); } } - /* - * Initialize the temporary var that holds the count of loop iterations. - */ - - TclEmitInstInt4(INST_FOREACH_START4, infoIndex, envPtr); - - /* - * Top of loop code: assign each loop variable and check whether - * to terminate the loop. - */ - - ExceptionRangeTarget(envPtr, range, continueOffset); - TclEmitInstInt4(INST_FOREACH_STEP4, infoIndex, envPtr); - TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFalseFixup); - + TclEmitInstInt4(INST_FOREACH_START, infoIndex, envPtr); + /* * Inline compile the loop body. */ - SetLineInformation (bodyIndex); + range = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); + ExceptionRangeStarts(envPtr, range); - CompileBody(envPtr, bodyTokenPtr, interp); + BODY(bodyTokenPtr, numWords - 1); ExceptionRangeEnds(envPtr, range); - envPtr->currStackDepth = savedStackDepth + 1; - TclEmitOpcode(INST_POP, envPtr); - - /* - * Jump back to the test at the top of the loop. Generate a 4 byte jump if - * the distance to the test is > 120 bytes. This is conservative and - * ensures that we won't have to replace this jump if we later need to - * replace the ifFalse jump with a 4 byte jump. - */ - - jumpBackOffset = CurrentOffset(envPtr); - jumpBackDist = jumpBackOffset-envPtr->exceptArrayPtr[range].continueOffset; - if (jumpBackDist > 120) { - TclEmitInstInt4(INST_JUMP4, -jumpBackDist, envPtr); + + if (collect == TCL_EACH_COLLECT) { + TclEmitOpcode(INST_LMAP_COLLECT, envPtr); } else { - TclEmitInstInt1(INST_JUMP1, -jumpBackDist, envPtr); + TclEmitOpcode( INST_POP, envPtr); } /* - * Fix the target of the jump after the foreach_step test. + * Bottom of loop code: assign each loop variable and check whether + * to terminate the loop. Set the loop's break target. */ - if (TclFixupForwardJumpToHere(envPtr, &jumpFalseFixup, 127)) { - /* - * Update the loop body's starting PC offset since it moved down. - */ - - envPtr->exceptArrayPtr[range].codeOffset += 3; - - /* - * Update the jump back to the test at the top of the loop since it - * also moved down 3 bytes. - */ - - jumpBackOffset += 3; - jumpPc = (envPtr->codeStart + jumpBackOffset); - jumpBackDist += 3; - if (jumpBackDist > 120) { - TclUpdateInstInt4AtPc(INST_JUMP4, -jumpBackDist, jumpPc); - } else { - TclUpdateInstInt1AtPc(INST_JUMP1, -jumpBackDist, jumpPc); - } - } + ExceptionRangeTarget(envPtr, range, continueOffset); + TclEmitOpcode(INST_FOREACH_STEP, envPtr); + ExceptionRangeTarget(envPtr, range, breakOffset); + TclFinalizeLoopExceptionRange(envPtr, range); + TclEmitOpcode(INST_FOREACH_END, envPtr); + TclAdjustStackDepth(-(numLists+2), envPtr); /* - * Set the loop's break target. + * Set the jumpback distance from INST_FOREACH_STEP to the start of the + * body's code. Misuse loopCtTemp for storing the jump size. */ - - ExceptionRangeTarget(envPtr, range, breakOffset); + + jumpBackOffset = envPtr->exceptArrayPtr[range].continueOffset - + envPtr->exceptArrayPtr[range].codeOffset; + infoPtr->loopCtTemp = -jumpBackOffset; /* - * The foreach command's result is an empty string. + * The command's result is an empty string if not collecting. If + * collecting, it is automatically left on stack after FOREACH_END. */ - envPtr->currStackDepth = savedStackDepth; - PushLiteral(envPtr, "", 0); - envPtr->currStackDepth = savedStackDepth + 1; - - done: + if (collect != TCL_EACH_COLLECT) { + PushStringLiteral(envPtr, ""); + } + + done: for (loopIndex = 0; loopIndex < numLists; loopIndex++) { if (varvList[loopIndex] != NULL) { - ckfree((char *) varvList[loopIndex]); + ckfree(varvList[loopIndex]); } } TclStackFree(interp, (void *)varvList); @@ -1899,8 +2750,8 @@ DupForeachInfo( register ForeachVarList *srcListPtr, *dupListPtr; int numVars, i, j, numLists = srcPtr->numLists; - dupPtr = (ForeachInfo *) ckalloc((unsigned) - sizeof(ForeachInfo) + numLists*sizeof(ForeachVarList *)); + dupPtr = ckalloc(sizeof(ForeachInfo) + + numLists * sizeof(ForeachVarList *)); dupPtr->numLists = numLists; dupPtr->firstValueTemp = srcPtr->firstValueTemp; dupPtr->loopCtTemp = srcPtr->loopCtTemp; @@ -1908,8 +2759,8 @@ DupForeachInfo( for (i = 0; i < numLists; i++) { srcListPtr = srcPtr->varLists[i]; numVars = srcListPtr->numVars; - dupListPtr = (ForeachVarList *) ckalloc((unsigned) - sizeof(ForeachVarList) + numVars*sizeof(int)); + dupListPtr = ckalloc(sizeof(ForeachVarList) + + numVars * sizeof(int)); dupListPtr->numVars = numVars; for (j = 0; j < numVars; j++) { dupListPtr->varIndexes[j] = srcListPtr->varIndexes[j]; @@ -1950,9 +2801,9 @@ FreeForeachInfo( for (i = 0; i < numLists; i++) { listPtr = infoPtr->varLists[i]; - ckfree((char *) listPtr); + ckfree(listPtr); } - ckfree((char *) infoPtr); + ckfree(infoPtr); } /* @@ -2011,462 +2862,58 @@ PrintForeachInfo( Tcl_AppendToObj(appendObj, "]", -1); } } - -/* - *---------------------------------------------------------------------- - * - * TclCompileIfCmd -- - * - * Procedure called to compile the "if" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "if" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileIfCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - JumpFixupArray jumpFalseFixupArray; - /* Used to fix the ifFalse jump after each - * test when its target PC is determined. */ - JumpFixupArray jumpEndFixupArray; - /* Used to fix the jump after each "then" body - * to the end of the "if" when that PC is - * determined. */ - Tcl_Token *tokenPtr, *testTokenPtr; - int jumpIndex = 0; /* Avoid compiler warning. */ - int jumpFalseDist, numWords, wordIdx, numBytes, j, code; - const char *word; - int savedStackDepth = envPtr->currStackDepth; - /* Saved stack depth at the start of the first - * test; the envPtr current depth is restored - * to this value at the start of each test. */ - int realCond = 1; /* Set to 0 for static conditions: - * "if 0 {..}" */ - int boolVal; /* Value of static condition. */ - int compileScripts = 1; - DefineLineInformation; /* TIP #280 */ - - /* - * Only compile the "if" command if all arguments are simple words, in - * order to insure correct substitution [Bug 219166] - */ - - tokenPtr = parsePtr->tokenPtr; - wordIdx = 0; - numWords = parsePtr->numWords; - - for (wordIdx = 0; wordIdx < numWords; wordIdx++) { - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } - tokenPtr = TokenAfter(tokenPtr); - } - - TclInitJumpFixupArray(&jumpFalseFixupArray); - TclInitJumpFixupArray(&jumpEndFixupArray); - code = TCL_OK; - - /* - * Each iteration of this loop compiles one "if expr ?then? body" or - * "elseif expr ?then? body" clause. - */ - - tokenPtr = parsePtr->tokenPtr; - wordIdx = 0; - while (wordIdx < numWords) { - /* - * Stop looping if the token isn't "if" or "elseif". - */ - - word = tokenPtr[1].start; - numBytes = tokenPtr[1].size; - if ((tokenPtr == parsePtr->tokenPtr) - || ((numBytes == 6) && (strncmp(word, "elseif", 6) == 0))) { - tokenPtr = TokenAfter(tokenPtr); - wordIdx++; - } else { - break; - } - if (wordIdx >= numWords) { - code = TCL_ERROR; - goto done; - } - - /* - * Compile the test expression then emit the conditional jump around - * the "then" part. - */ - - envPtr->currStackDepth = savedStackDepth; - testTokenPtr = tokenPtr; - - if (realCond) { - /* - * Find out if the condition is a constant. - */ - - Tcl_Obj *boolObj = Tcl_NewStringObj(testTokenPtr[1].start, - testTokenPtr[1].size); - Tcl_IncrRefCount(boolObj); - code = Tcl_GetBooleanFromObj(NULL, boolObj, &boolVal); - TclDecrRefCount(boolObj); - if (code == TCL_OK) { - /* - * A static condition. - */ - - realCond = 0; - if (!boolVal) { - compileScripts = 0; - } - } else { - SetLineInformation (wordIdx); - Tcl_ResetResult(interp); - TclCompileExprWords(interp, testTokenPtr, 1, envPtr); - if (jumpFalseFixupArray.next >= jumpFalseFixupArray.end) { - TclExpandJumpFixupArray(&jumpFalseFixupArray); - } - jumpIndex = jumpFalseFixupArray.next; - jumpFalseFixupArray.next++; - TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, - jumpFalseFixupArray.fixup+jumpIndex); - } - code = TCL_OK; - } - - /* - * Skip over the optional "then" before the then clause. - */ - - tokenPtr = TokenAfter(testTokenPtr); - wordIdx++; - if (wordIdx >= numWords) { - code = TCL_ERROR; - goto done; - } - if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - word = tokenPtr[1].start; - numBytes = tokenPtr[1].size; - if ((numBytes == 4) && (strncmp(word, "then", 4) == 0)) { - tokenPtr = TokenAfter(tokenPtr); - wordIdx++; - if (wordIdx >= numWords) { - code = TCL_ERROR; - goto done; - } - } - } - - /* - * Compile the "then" command body. - */ - - if (compileScripts) { - SetLineInformation (wordIdx); - envPtr->currStackDepth = savedStackDepth; - CompileBody(envPtr, tokenPtr, interp); - } - - if (realCond) { - /* - * Jump to the end of the "if" command. Both jumpFalseFixupArray - * and jumpEndFixupArray are indexed by "jumpIndex". - */ - - if (jumpEndFixupArray.next >= jumpEndFixupArray.end) { - TclExpandJumpFixupArray(&jumpEndFixupArray); - } - jumpEndFixupArray.next++; - TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, - jumpEndFixupArray.fixup+jumpIndex); - - /* - * Fix the target of the jumpFalse after the test. Generate a 4 - * byte jump if the distance is > 120 bytes. This is conservative, - * and ensures that we won't have to replace this jump if we later - * also need to replace the proceeding jump to the end of the "if" - * with a 4 byte jump. - */ - - if (TclFixupForwardJumpToHere(envPtr, - jumpFalseFixupArray.fixup+jumpIndex, 120)) { - /* - * Adjust the code offset for the proceeding jump to the end - * of the "if" command. - */ - - jumpEndFixupArray.fixup[jumpIndex].codeOffset += 3; - } - } else if (boolVal) { - /* - * We were processing an "if 1 {...}"; stop compiling scripts. - */ - compileScripts = 0; - } else { - /* - * We were processing an "if 0 {...}"; reset so that the rest - * (elseif, else) is compiled correctly. - */ - - realCond = 1; - compileScripts = 1; - } - - tokenPtr = TokenAfter(tokenPtr); - wordIdx++; - } - - /* - * Restore the current stack depth in the environment; the "else" clause - * (or its default) will add 1 to this. - */ - - envPtr->currStackDepth = savedStackDepth; - - /* - * Check for the optional else clause. Do not compile anything if this was - * an "if 1 {...}" case. - */ - - if ((wordIdx < numWords) && (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD)) { - /* - * There is an else clause. Skip over the optional "else" word. - */ - - word = tokenPtr[1].start; - numBytes = tokenPtr[1].size; - if ((numBytes == 4) && (strncmp(word, "else", 4) == 0)) { - tokenPtr = TokenAfter(tokenPtr); - wordIdx++; - if (wordIdx >= numWords) { - code = TCL_ERROR; - goto done; - } - } - - if (compileScripts) { - /* - * Compile the else command body. - */ - - SetLineInformation (wordIdx); - CompileBody(envPtr, tokenPtr, interp); - } - - /* - * Make sure there are no words after the else clause. - */ - - wordIdx++; - if (wordIdx < numWords) { - code = TCL_ERROR; - goto done; - } - } else { - /* - * No else clause: the "if" command's result is an empty string. - */ - - if (compileScripts) { - PushLiteral(envPtr, "", 0); - } - } - - /* - * Fix the unconditional jumps to the end of the "if" command. - */ - - for (j = jumpEndFixupArray.next; j > 0; j--) { - jumpIndex = (j - 1); /* i.e. process the closest jump first. */ - if (TclFixupForwardJumpToHere(envPtr, - jumpEndFixupArray.fixup+jumpIndex, 127)) { - /* - * Adjust the immediately preceeding "ifFalse" jump. We moved it's - * target (just after this jump) down three bytes. - */ - - unsigned char *ifFalsePc = envPtr->codeStart - + jumpFalseFixupArray.fixup[jumpIndex].codeOffset; - unsigned char opCode = *ifFalsePc; - - if (opCode == INST_JUMP_FALSE1) { - jumpFalseDist = TclGetInt1AtPtr(ifFalsePc + 1); - jumpFalseDist += 3; - TclStoreInt1AtPtr(jumpFalseDist, (ifFalsePc + 1)); - } else if (opCode == INST_JUMP_FALSE4) { - jumpFalseDist = TclGetInt4AtPtr(ifFalsePc + 1); - jumpFalseDist += 3; - TclStoreInt4AtPtr(jumpFalseDist, (ifFalsePc + 1)); - } else { - Tcl_Panic("TclCompileIfCmd: unexpected opcode \"%d\" updating ifFalse jump", (int) opCode); - } - } - } - - /* - * Free the jumpFixupArray array if malloc'ed storage was used. - */ - - done: - envPtr->currStackDepth = savedStackDepth + 1; - TclFreeJumpFixupArray(&jumpFalseFixupArray); - TclFreeJumpFixupArray(&jumpEndFixupArray); - return code; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileIncrCmd -- - * - * Procedure called to compile the "incr" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "incr" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileIncrCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ +static void +PrintNewForeachInfo( + ClientData clientData, + Tcl_Obj *appendObj, + ByteCode *codePtr, + unsigned int pcOffset) { - Tcl_Token *varTokenPtr, *incrTokenPtr; - int simpleVarName, isScalar, localIndex, haveImmValue, immValue; - DefineLineInformation; /* TIP #280 */ - - if ((parsePtr->numWords != 2) && (parsePtr->numWords != 3)) { - return TCL_ERROR; - } - - varTokenPtr = TokenAfter(parsePtr->tokenPtr); - - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_LARGE_INDEX|TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); - - /* - * If an increment is given, push it, but see first if it's a small - * integer. - */ + register ForeachInfo *infoPtr = clientData; + register ForeachVarList *varsPtr; + int i, j; - haveImmValue = 0; - immValue = 1; - if (parsePtr->numWords == 3) { - incrTokenPtr = TokenAfter(varTokenPtr); - if (incrTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - const char *word = incrTokenPtr[1].start; - int numBytes = incrTokenPtr[1].size; - int code; - Tcl_Obj *intObj = Tcl_NewStringObj(word, numBytes); - Tcl_IncrRefCount(intObj); - code = TclGetIntFromObj(NULL, intObj, &immValue); - TclDecrRefCount(intObj); - if ((code == TCL_OK) && (-127 <= immValue) && (immValue <= 127)) { - haveImmValue = 1; - } - if (!haveImmValue) { - PushLiteral(envPtr, word, numBytes); - } - } else { - SetLineInformation (2); - CompileTokens(envPtr, incrTokenPtr, interp); + Tcl_AppendPrintfToObj(appendObj, "jumpOffset=%+d, vars=", + infoPtr->loopCtTemp); + for (i=0 ; i<infoPtr->numLists ; i++) { + if (i) { + Tcl_AppendToObj(appendObj, ",", -1); } - } else { /* No incr amount given so use 1. */ - haveImmValue = 1; - } - - /* - * Emit the instruction to increment the variable. - */ - - if (simpleVarName) { - if (isScalar) { - if (localIndex >= 0) { - if (haveImmValue) { - TclEmitInstInt1(INST_INCR_SCALAR1_IMM, localIndex, envPtr); - TclEmitInt1(immValue, envPtr); - } else { - TclEmitInstInt1(INST_INCR_SCALAR1, localIndex, envPtr); - } - } else { - if (haveImmValue) { - TclEmitInstInt1(INST_INCR_SCALAR_STK_IMM, immValue, envPtr); - } else { - TclEmitOpcode(INST_INCR_SCALAR_STK, envPtr); - } - } - } else { - if (localIndex >= 0) { - if (haveImmValue) { - TclEmitInstInt1(INST_INCR_ARRAY1_IMM, localIndex, envPtr); - TclEmitInt1(immValue, envPtr); - } else { - TclEmitInstInt1(INST_INCR_ARRAY1, localIndex, envPtr); - } - } else { - if (haveImmValue) { - TclEmitInstInt1(INST_INCR_ARRAY_STK_IMM, immValue, envPtr); - } else { - TclEmitOpcode(INST_INCR_ARRAY_STK, envPtr); - } + Tcl_AppendToObj(appendObj, "[", -1); + varsPtr = infoPtr->varLists[i]; + for (j=0 ; j<varsPtr->numVars ; j++) { + if (j) { + Tcl_AppendToObj(appendObj, ",", -1); } + Tcl_AppendPrintfToObj(appendObj, "%%v%u", + (unsigned) varsPtr->varIndexes[j]); } - } else { /* Non-simple variable name. */ - if (haveImmValue) { - TclEmitInstInt1(INST_INCR_STK_IMM, immValue, envPtr); - } else { - TclEmitOpcode(INST_INCR_STK, envPtr); - } + Tcl_AppendToObj(appendObj, "]", -1); } - - return TCL_OK; } /* *---------------------------------------------------------------------- * - * TclCompileLappendCmd -- + * TclCompileFormatCmd -- * - * Procedure called to compile the "lappend" command. + * Procedure called to compile the "format" command. Handles cases that + * can be done as constants or simple string concatenation only. * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. * * Side effects: - * Instructions are added to envPtr to execute the "lappend" command at + * Instructions are added to envPtr to execute the "format" command at * runtime. * *---------------------------------------------------------------------- */ int -TclCompileLappendCmd( +TclCompileFormatCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ @@ -2474,2433 +2921,236 @@ TclCompileLappendCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Tcl_Token *varTokenPtr; - int simpleVarName, isScalar, localIndex, numWords; DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = parsePtr->tokenPtr; + Tcl_Obj **objv, *formatObj, *tmpObj; + char *bytes, *start; + int i, j, len; /* - * If we're not in a procedure, don't compile. + * Don't handle any guaranteed-error cases. */ - if (envPtr->procPtr == NULL) { - return TCL_ERROR; - } - - numWords = parsePtr->numWords; - if (numWords == 1) { - return TCL_ERROR; - } - if (numWords != 3) { - /* - * LAPPEND instructions currently only handle one value appends. - */ - + if (parsePtr->numWords < 2) { return TCL_ERROR; } /* - * Decide if we can use a frame slot for the var/array name or if we - * need to emit code to compute and push the name at runtime. We use a - * frame slot (entry in the array of local vars) if we are compiling a - * procedure body and if the name is simple text that does not include - * namespace qualifiers. - */ - - varTokenPtr = TokenAfter(parsePtr->tokenPtr); - - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); - - /* - * If we are doing an assignment, push the new value. In the no values - * case, create an empty object. - */ - - if (numWords > 2) { - Tcl_Token *valueTokenPtr = TokenAfter(varTokenPtr); - CompileWord(envPtr, valueTokenPtr, interp, 2); - } - - /* - * Emit instructions to set/get the variable. - */ - - /* - * The *_STK opcodes should be refactored to make better use of existing - * LOAD/STORE instructions. - */ - - if (simpleVarName) { - if (isScalar) { - if (localIndex < 0) { - TclEmitOpcode(INST_LAPPEND_STK, envPtr); - } else if (localIndex <= 255) { - TclEmitInstInt1(INST_LAPPEND_SCALAR1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_LAPPEND_SCALAR4, localIndex, envPtr); - } - } else { - if (localIndex < 0) { - TclEmitOpcode(INST_LAPPEND_ARRAY_STK, envPtr); - } else if (localIndex <= 255) { - TclEmitInstInt1(INST_LAPPEND_ARRAY1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_LAPPEND_ARRAY4, localIndex, envPtr); - } - } - } else { - TclEmitOpcode(INST_LAPPEND_STK, envPtr); - } - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileLassignCmd -- - * - * Procedure called to compile the "lassign" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "lassign" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileLassignCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *tokenPtr; - int simpleVarName, isScalar, localIndex, numWords, idx; - DefineLineInformation; /* TIP #280 */ - - numWords = parsePtr->numWords; - - /* - * Check for command syntax error, but we'll punt that to runtime. + * Check if the argument words are all compile-time-known literals; that's + * a case we can handle by compiling to a constant. */ - if (numWords < 3) { + formatObj = Tcl_NewObj(); + Tcl_IncrRefCount(formatObj); + tokenPtr = TokenAfter(tokenPtr); + if (!TclWordKnownAtCompileTime(tokenPtr, formatObj)) { + Tcl_DecrRefCount(formatObj); return TCL_ERROR; } - /* - * Generate code to push list being taken apart by [lassign]. - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - - /* - * Generate code to assign values from the list to variables. - */ - - for (idx=0 ; idx<numWords-2 ; idx++) { + objv = ckalloc((parsePtr->numWords-2) * sizeof(Tcl_Obj *)); + for (i=0 ; i+2 < parsePtr->numWords ; i++) { tokenPtr = TokenAfter(tokenPtr); - - /* - * Generate the next variable name. - */ - - PushVarNameWord(interp, tokenPtr, envPtr, TCL_CREATE_VAR, &localIndex, - &simpleVarName, &isScalar, idx+2); - - /* - * Emit instructions to get the idx'th item out of the list value on - * the stack and assign it to the variable. - */ - - if (simpleVarName) { - if (isScalar) { - if (localIndex >= 0) { - TclEmitOpcode(INST_DUP, envPtr); - TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr); - if (localIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1,localIndex,envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4,localIndex,envPtr); - } - } else { - TclEmitInstInt4(INST_OVER, 1, envPtr); - TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr); - TclEmitOpcode(INST_STORE_SCALAR_STK, envPtr); - } - } else { - if (localIndex >= 0) { - TclEmitInstInt4(INST_OVER, 1, envPtr); - TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr); - if (localIndex <= 255) { - TclEmitInstInt1(INST_STORE_ARRAY1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_ARRAY4, localIndex, envPtr); - } - } else { - TclEmitInstInt4(INST_OVER, 2, envPtr); - TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr); - TclEmitOpcode(INST_STORE_ARRAY_STK, envPtr); - } - } - } else { - TclEmitInstInt4(INST_OVER, 1, envPtr); - TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr); - TclEmitOpcode(INST_STORE_STK, envPtr); - } - TclEmitOpcode(INST_POP, envPtr); - } - - /* - * Generate code to leave the rest of the list on the stack. - */ - - TclEmitInstInt4(INST_LIST_RANGE_IMM, idx, envPtr); - TclEmitInt4(-2, envPtr); /* -2 == "end" */ - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileLindexCmd -- - * - * Procedure called to compile the "lindex" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "lindex" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileLindexCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *idxTokenPtr, *valTokenPtr; - int i, numWords = parsePtr->numWords; - DefineLineInformation; /* TIP #280 */ - - /* - * Quit if too few args. - */ - - if (numWords <= 1) { - return TCL_ERROR; - } - - valTokenPtr = TokenAfter(parsePtr->tokenPtr); - if (numWords != 3) { - goto emitComplexLindex; - } - - idxTokenPtr = TokenAfter(valTokenPtr); - if (idxTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - Tcl_Obj *tmpObj; - int idx, result; - - tmpObj = Tcl_NewStringObj(idxTokenPtr[1].start, idxTokenPtr[1].size); - result = TclGetIntFromObj(NULL, tmpObj, &idx); - TclDecrRefCount(tmpObj); - - if (result == TCL_OK && idx >= 0) { - /* - * All checks have been completed, and we have exactly this - * construct: - * lindex <arbitraryValue> <posInt> - * This is best compiled as a push of the arbitrary value followed - * by an "immediate lindex" which is the most efficient variety. - */ - - CompileWord(envPtr, valTokenPtr, interp, 1); - TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr); - return TCL_OK; - } - - /* - * If the conversion failed or the value was negative, we just keep on - * going with the more complex compilation. - */ - } - - /* - * Push the operands onto the stack. - */ - - emitComplexLindex: - for (i=1 ; i<numWords ; i++) { - CompileWord(envPtr, valTokenPtr, interp, i); - valTokenPtr = TokenAfter(valTokenPtr); - } - - /* - * Emit INST_LIST_INDEX if objc==3, or INST_LIST_INDEX_MULTI if there are - * multiple index args. - */ - - if (numWords == 3) { - TclEmitOpcode(INST_LIST_INDEX, envPtr); - } else { - TclEmitInstInt4(INST_LIST_INDEX_MULTI, numWords-1, envPtr); - } - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileListCmd -- - * - * Procedure called to compile the "list" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "list" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileListCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - DefineLineInformation; /* TIP #280 */ - - /* - * If we're not in a procedure, don't compile. - */ - - if (envPtr->procPtr == NULL) { - return TCL_ERROR; - } - - if (parsePtr->numWords == 1) { - /* - * [list] without arguments just pushes an empty object. - */ - - PushLiteral(envPtr, "", 0); - } else { - /* - * Push the all values onto the stack. - */ - - Tcl_Token *valueTokenPtr; - int i, numWords; - - numWords = parsePtr->numWords; - - valueTokenPtr = TokenAfter(parsePtr->tokenPtr); - for (i = 1; i < numWords; i++) { - CompileWord(envPtr, valueTokenPtr, interp, i); - valueTokenPtr = TokenAfter(valueTokenPtr); - } - TclEmitInstInt4(INST_LIST, numWords - 1, envPtr); - } - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileLlengthCmd -- - * - * Procedure called to compile the "llength" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "llength" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileLlengthCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *varTokenPtr; - DefineLineInformation; /* TIP #280 */ - - if (parsePtr->numWords != 2) { - return TCL_ERROR; - } - varTokenPtr = TokenAfter(parsePtr->tokenPtr); - - CompileWord(envPtr, varTokenPtr, interp, 1); - TclEmitOpcode(INST_LIST_LENGTH, envPtr); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileLsetCmd -- - * - * Procedure called to compile the "lset" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "lset" command at - * runtime. - * - * The general template for execution of the "lset" command is: - * (1) Instructions to push the variable name, unless the variable is - * local to the stack frame. - * (2) If the variable is an array element, instructions to push the - * array element name. - * (3) Instructions to push each of zero or more "index" arguments to the - * stack, followed with the "newValue" element. - * (4) Instructions to duplicate the variable name and/or array element - * name onto the top of the stack, if either was pushed at steps (1) - * and (2). - * (5) The appropriate INST_LOAD_* instruction to place the original - * value of the list variable at top of stack. - * (6) At this point, the stack contains: - * varName? arrayElementName? index1 index2 ... newValue oldList - * The compiler emits one of INST_LSET_FLAT or INST_LSET_LIST - * according as whether there is exactly one index element (LIST) or - * either zero or else two or more (FLAT). This instruction removes - * everything from the stack except for the two names and pushes the - * new value of the variable. - * (7) Finally, INST_STORE_* stores the new value in the variable and - * cleans up the stack. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileLsetCmd( - Tcl_Interp *interp, /* Tcl interpreter for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the - * command. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds the resulting instructions. */ -{ - int tempDepth; /* Depth used for emitting one part of the - * code burst. */ - Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing the - * parse of the variable name. */ - int localIndex; /* Index of var in local var table. */ - int simpleVarName; /* Flag == 1 if var name is simple. */ - int isScalar; /* Flag == 1 if scalar, 0 if array. */ - int i; - DefineLineInformation; /* TIP #280 */ - - /* - * Check argument count. - */ - - if (parsePtr->numWords < 3) { - /* - * Fail at run time, not in compilation. - */ - - return TCL_ERROR; - } - - /* - * Decide if we can use a frame slot for the var/array name or if we need - * to emit code to compute and push the name at runtime. We use a frame - * slot (entry in the array of local vars) if we are compiling a procedure - * body and if the name is simple text that does not include namespace - * qualifiers. - */ - - varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); - - /* - * Push the "index" args and the new element value. - */ - - for (i=2 ; i<parsePtr->numWords ; ++i) { - varTokenPtr = TokenAfter(varTokenPtr); - CompileWord(envPtr, varTokenPtr, interp, i); - } - - /* - * Duplicate the variable name if it's been pushed. - */ - - if (!simpleVarName || localIndex < 0) { - if (!simpleVarName || isScalar) { - tempDepth = parsePtr->numWords - 2; - } else { - tempDepth = parsePtr->numWords - 1; - } - TclEmitInstInt4(INST_OVER, tempDepth, envPtr); - } - - /* - * Duplicate an array index if one's been pushed. - */ - - if (simpleVarName && !isScalar) { - if (localIndex < 0) { - tempDepth = parsePtr->numWords - 1; - } else { - tempDepth = parsePtr->numWords - 2; - } - TclEmitInstInt4(INST_OVER, tempDepth, envPtr); - } - - /* - * Emit code to load the variable's value. - */ - - if (!simpleVarName) { - TclEmitOpcode(INST_LOAD_STK, envPtr); - } else if (isScalar) { - if (localIndex < 0) { - TclEmitOpcode(INST_LOAD_SCALAR_STK, envPtr); - } else if (localIndex < 0x100) { - TclEmitInstInt1(INST_LOAD_SCALAR1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_LOAD_SCALAR4, localIndex, envPtr); - } - } else { - if (localIndex < 0) { - TclEmitOpcode(INST_LOAD_ARRAY_STK, envPtr); - } else if (localIndex < 0x100) { - TclEmitInstInt1(INST_LOAD_ARRAY1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_LOAD_ARRAY4, localIndex, envPtr); - } - } - - /* - * Emit the correct variety of 'lset' instruction. - */ - - if (parsePtr->numWords == 4) { - TclEmitOpcode(INST_LSET_LIST, envPtr); - } else { - TclEmitInstInt4(INST_LSET_FLAT, parsePtr->numWords-1, envPtr); - } - - /* - * Emit code to put the value back in the variable. - */ - - if (!simpleVarName) { - TclEmitOpcode(INST_STORE_STK, envPtr); - } else if (isScalar) { - if (localIndex < 0) { - TclEmitOpcode(INST_STORE_SCALAR_STK, envPtr); - } else if (localIndex < 0x100) { - TclEmitInstInt1(INST_STORE_SCALAR1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, localIndex, envPtr); - } - } else { - if (localIndex < 0) { - TclEmitOpcode(INST_STORE_ARRAY_STK, envPtr); - } else if (localIndex < 0x100) { - TclEmitInstInt1(INST_STORE_ARRAY1, localIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_ARRAY4, localIndex, envPtr); - } - } - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileRegexpCmd -- - * - * Procedure called to compile the "regexp" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "regexp" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileRegexpCmd( - Tcl_Interp *interp, /* Tcl interpreter for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the - * command. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds the resulting instructions. */ -{ - Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing the - * parse of the RE or string. */ - int i, len, nocase, exact, sawLast, simple; - char *str; - DefineLineInformation; /* TIP #280 */ - - /* - * We are only interested in compiling simple regexp cases. Currently - * supported compile cases are: - * regexp ?-nocase? ?--? staticString $var - * regexp ?-nocase? ?--? {^staticString$} $var - */ - - if (parsePtr->numWords < 3) { - return TCL_ERROR; - } - - simple = 0; - nocase = 0; - sawLast = 0; - varTokenPtr = parsePtr->tokenPtr; - - /* - * We only look for -nocase and -- as options. Everything else gets pushed - * to runtime execution. This is different than regexp's runtime option - * handling, but satisfies our stricter needs. - */ - - for (i = 1; i < parsePtr->numWords - 2; i++) { - varTokenPtr = TokenAfter(varTokenPtr); - if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - /* - * Not a simple string, so punt to runtime. - */ - - return TCL_ERROR; - } - str = (char *) varTokenPtr[1].start; - len = varTokenPtr[1].size; - if ((len == 2) && (str[0] == '-') && (str[1] == '-')) { - sawLast++; - i++; - break; - } else if ((len > 1) && (strncmp(str,"-nocase",(unsigned)len) == 0)) { - nocase = 1; - } else { - /* - * Not an option we recognize. - */ - - return TCL_ERROR; - } - } - - if ((parsePtr->numWords - i) != 2) { - /* - * We don't support capturing to variables. - */ - - return TCL_ERROR; - } - - /* - * Get the regexp string. If it is not a simple string or can't be - * converted to a glob pattern, push the word for the INST_REGEXP. - * Keep changes here in sync with TclCompileSwitchCmd Switch_Regexp. - */ - - varTokenPtr = TokenAfter(varTokenPtr); - - if (varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - Tcl_DString ds; - - str = (char *) varTokenPtr[1].start; - len = varTokenPtr[1].size; - /* - * If it has a '-', it could be an incorrectly formed regexp command. - */ - - if ((*str == '-') && !sawLast) { - return TCL_ERROR; - } - - if (len == 0) { - /* - * The semantics of regexp are always match on re == "". - */ - - PushLiteral(envPtr, "1", 1); - return TCL_OK; - } - - /* - * Attempt to convert pattern to glob. If successful, push the - * converted pattern as a literal. - */ - - if (TclReToGlob(NULL, varTokenPtr[1].start, len, &ds, &exact) - == TCL_OK) { - simple = 1; - PushLiteral(envPtr, Tcl_DStringValue(&ds),Tcl_DStringLength(&ds)); - Tcl_DStringFree(&ds); - } - } - - if (!simple) { - CompileWord(envPtr, varTokenPtr, interp, parsePtr->numWords-2); - } - - /* - * Push the string arg. - */ - - varTokenPtr = TokenAfter(varTokenPtr); - CompileWord(envPtr, varTokenPtr, interp, parsePtr->numWords-1); - - if (simple) { - if (exact && !nocase) { - TclEmitOpcode(INST_STR_EQ, envPtr); - } else { - TclEmitInstInt1(INST_STR_MATCH, nocase, envPtr); - } - } else { - /* - * Pass correct RE compile flags. We use only Int1 (8-bit), but - * that handles all the flags we want to pass. - * Don't use TCL_REG_NOSUB as we may have backrefs. - */ - int cflags = TCL_REG_ADVANCED | (nocase ? TCL_REG_NOCASE : 0); - TclEmitInstInt1(INST_REGEXP, cflags, envPtr); - } - - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileReturnCmd -- - * - * Procedure called to compile the "return" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "return" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileReturnCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - /* - * General syntax: [return ?-option value ...? ?result?] - * An even number of words means an explicit result argument is present. - */ - int level, code, objc, size, status = TCL_OK; - int numWords = parsePtr->numWords; - int explicitResult = (0 == (numWords % 2)); - int numOptionWords = numWords - 1 - explicitResult; - Tcl_Obj *returnOpts, **objv; - Tcl_Token *wordTokenPtr = TokenAfter(parsePtr->tokenPtr); - DefineLineInformation; /* TIP #280 */ - - /* - * Check for special case which can always be compiled: - * return -options <opts> <msg> - * Unlike the normal [return] compilation, this version does everything at - * runtime so it can handle arbitrary words and not just literals. Note - * that if INST_RETURN_STK wasn't already needed for something else - * ('finally' clause processing) this piece of code would not be present. - */ - - if ((numWords == 4) && (wordTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) - && (wordTokenPtr[1].size == 8) - && (strncmp(wordTokenPtr[1].start, "-options", 8) == 0)) { - Tcl_Token *optsTokenPtr = TokenAfter(wordTokenPtr); - Tcl_Token *msgTokenPtr = TokenAfter(optsTokenPtr); - - CompileWord(envPtr, optsTokenPtr, interp, 2); - CompileWord(envPtr, msgTokenPtr, interp, 3); - TclEmitOpcode(INST_RETURN_STK, envPtr); - return TCL_OK; - } - - /* - * Allocate some working space. - */ - - objv = (Tcl_Obj **) TclStackAlloc(interp, - numOptionWords * sizeof(Tcl_Obj *)); - - /* - * Scan through the return options. If any are unknown at compile time, - * there is no value in bytecompiling. Save the option values known in an - * objv array for merging into a return options dictionary. - */ - - for (objc = 0; objc < numOptionWords; objc++) { - objv[objc] = Tcl_NewObj(); - Tcl_IncrRefCount(objv[objc]); - if (!TclWordKnownAtCompileTime(wordTokenPtr, objv[objc])) { - objc++; - status = TCL_ERROR; - goto cleanup; + objv[i] = Tcl_NewObj(); + Tcl_IncrRefCount(objv[i]); + if (!TclWordKnownAtCompileTime(tokenPtr, objv[i])) { + goto checkForStringConcatCase; } - wordTokenPtr = TokenAfter(wordTokenPtr); - } - status = TclMergeReturnOptions(interp, objc, objv, - &returnOpts, &code, &level); - cleanup: - while (--objc >= 0) { - TclDecrRefCount(objv[objc]); - } - TclStackFree(interp, objv); - if (TCL_ERROR == status) { - /* - * Something was bogus in the return options. Clear the error message, - * and report back to the compiler that this must be interpreted at - * runtime. - */ - - Tcl_ResetResult(interp); - return TCL_ERROR; } /* - * All options are known at compile time, so we're going to bytecompile. - * Emit instructions to push the result on the stack. + * Everything is a literal, so the result is constant too (or an error if + * the format is broken). Do the format now. */ - if (explicitResult) { - CompileWord(envPtr, wordTokenPtr, interp, numWords-1); - } else { - /* - * No explict result argument, so default result is empty string. - */ - - PushLiteral(envPtr, "", 0); + tmpObj = Tcl_Format(interp, Tcl_GetString(formatObj), + parsePtr->numWords-2, objv); + for (; --i>=0 ;) { + Tcl_DecrRefCount(objv[i]); } - - /* - * Check for optimization: When [return] is in a proc, and there's no - * enclosing [catch], and there are no return options, then the INST_DONE - * instruction is equivalent, and may be more efficient. - */ - - if (numOptionWords == 0 && envPtr->procPtr != NULL) { - /* - * We have default return options and we're in a proc ... - */ - - int index = envPtr->exceptArrayNext - 1; - int enclosingCatch = 0; - - while (index >= 0) { - ExceptionRange range = envPtr->exceptArrayPtr[index]; - if ((range.type == CATCH_EXCEPTION_RANGE) - && (range.catchOffset == -1)) { - enclosingCatch = 1; - break; - } - index--; - } - if (!enclosingCatch) { - /* - * ... and there is no enclosing catch. Issue the maximally - * efficient exit instruction. - */ - - Tcl_DecrRefCount(returnOpts); - TclEmitOpcode(INST_DONE, envPtr); - return TCL_OK; - } - } - - /* Optimize [return -level 0 $x]. */ - Tcl_DictObjSize(NULL, returnOpts, &size); - if (size == 0 && level == 0 && code == TCL_OK) { - Tcl_DecrRefCount(returnOpts); + ckfree(objv); + Tcl_DecrRefCount(formatObj); + if (tmpObj == NULL) { + TclCompileSyntaxError(interp, envPtr); return TCL_OK; } /* - * Could not use the optimization, so we push the return options dict, and - * emit the INST_RETURN_IMM instruction with code and level as operands. - */ - - CompileReturnInternal(envPtr, INST_RETURN_IMM, code, level, returnOpts); - return TCL_OK; -} - -static void -CompileReturnInternal( - CompileEnv *envPtr, - unsigned char op, - int code, - int level, - Tcl_Obj *returnOpts) -{ - TclEmitPush(TclAddLiteralObj(envPtr, returnOpts, NULL), envPtr); - TclEmitInstInt4(op, code, envPtr); - TclEmitInt4(level, envPtr); -} - -void -TclCompileSyntaxError( - Tcl_Interp *interp, - CompileEnv *envPtr) -{ - Tcl_Obj *msg = Tcl_GetObjResult(interp); - int numBytes; - const char *bytes = TclGetStringFromObj(msg, &numBytes); - - TclEmitPush(TclRegisterNewLiteral(envPtr, bytes, numBytes), envPtr); - CompileReturnInternal(envPtr, INST_SYNTAX, TCL_ERROR, 0, - Tcl_GetReturnOptions(interp, TCL_ERROR)); -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileSetCmd -- - * - * Procedure called to compile the "set" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "set" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileSetCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *varTokenPtr, *valueTokenPtr; - int isAssignment, isScalar, simpleVarName, localIndex, numWords; - DefineLineInformation; /* TIP #280 */ - - numWords = parsePtr->numWords; - if ((numWords != 2) && (numWords != 3)) { - return TCL_ERROR; - } - isAssignment = (numWords == 3); - - /* - * Decide if we can use a frame slot for the var/array name or if we need - * to emit code to compute and push the name at runtime. We use a frame - * slot (entry in the array of local vars) if we are compiling a procedure - * body and if the name is simple text that does not include namespace - * qualifiers. - */ - - varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); - - /* - * If we are doing an assignment, push the new value. - */ - - if (isAssignment) { - valueTokenPtr = TokenAfter(varTokenPtr); - CompileWord(envPtr, valueTokenPtr, interp, 2); - } - - /* - * Emit instructions to set/get the variable. + * Not an error, always a constant result, so just push the result as a + * literal. Job done. */ - if (simpleVarName) { - if (isScalar) { - if (localIndex < 0) { - TclEmitOpcode((isAssignment? - INST_STORE_SCALAR_STK : INST_LOAD_SCALAR_STK), envPtr); - } else if (localIndex <= 255) { - TclEmitInstInt1((isAssignment? - INST_STORE_SCALAR1 : INST_LOAD_SCALAR1), - localIndex, envPtr); - } else { - TclEmitInstInt4((isAssignment? - INST_STORE_SCALAR4 : INST_LOAD_SCALAR4), - localIndex, envPtr); - } - } else { - if (localIndex < 0) { - TclEmitOpcode((isAssignment? - INST_STORE_ARRAY_STK : INST_LOAD_ARRAY_STK), envPtr); - } else if (localIndex <= 255) { - TclEmitInstInt1((isAssignment? - INST_STORE_ARRAY1 : INST_LOAD_ARRAY1), - localIndex, envPtr); - } else { - TclEmitInstInt4((isAssignment? - INST_STORE_ARRAY4 : INST_LOAD_ARRAY4), - localIndex, envPtr); - } - } - } else { - TclEmitOpcode((isAssignment? INST_STORE_STK : INST_LOAD_STK), envPtr); - } - + bytes = Tcl_GetStringFromObj(tmpObj, &len); + PushLiteral(envPtr, bytes, len); + Tcl_DecrRefCount(tmpObj); return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileStringCmpCmd -- - * - * Procedure called to compile the simplest and most common form of the - * "string compare" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "string compare" - * command at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileStringCmpCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - DefineLineInformation; /* TIP #280 */ - Tcl_Token *tokenPtr; + checkForStringConcatCase: /* - * We don't support any flags; the bytecode isn't that sophisticated. - */ - - if (parsePtr->numWords != 3) { - return TCL_ERROR; - } - - /* - * Push the two operands onto the stack and then the test. - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 2); - TclEmitOpcode(INST_STR_CMP, envPtr); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileStringEqualCmd -- - * - * Procedure called to compile the simplest and most common form of the - * "string equal" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "string equal" command - * at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileStringEqualCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - DefineLineInformation; /* TIP #280 */ - Tcl_Token *tokenPtr; - - /* - * We don't support any flags; the bytecode isn't that sophisticated. - */ - - if (parsePtr->numWords != 3) { - return TCL_ERROR; - } - - /* - * Push the two operands onto the stack and then the test. - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 2); - TclEmitOpcode(INST_STR_EQ, envPtr); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileStringIndexCmd -- - * - * Procedure called to compile the simplest and most common form of the - * "string index" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "string index" command - * at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileStringIndexCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - DefineLineInformation; /* TIP #280 */ - Tcl_Token *tokenPtr; - - if (parsePtr->numWords != 3) { - return TCL_ERROR; - } - - /* - * Push the two operands onto the stack and then the index operation. - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 2); - TclEmitOpcode(INST_STR_INDEX, envPtr); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileStringMatchCmd -- - * - * Procedure called to compile the simplest and most common form of the - * "string match" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "string match" command - * at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileStringMatchCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - DefineLineInformation; /* TIP #280 */ - Tcl_Token *tokenPtr; - int i, length, exactMatch = 0, nocase = 0; - const char *str; - - if (parsePtr->numWords < 3 || parsePtr->numWords > 4) { - return TCL_ERROR; - } - tokenPtr = TokenAfter(parsePtr->tokenPtr); - - /* - * Check if we have a -nocase flag. - */ - - if (parsePtr->numWords == 4) { - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } - str = tokenPtr[1].start; - length = tokenPtr[1].size; - if ((length <= 1) || strncmp(str, "-nocase", (size_t) length)) { - /* - * Fail at run time, not in compilation. - */ - - return TCL_ERROR; - } - nocase = 1; - tokenPtr = TokenAfter(tokenPtr); - } - - /* - * Push the strings to match against each other. - */ - - for (i = 0; i < 2; i++) { - if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - str = tokenPtr[1].start; - length = tokenPtr[1].size; - if (!nocase && (i == 0)) { - /* - * Trivial matches can be done by 'string equal'. If -nocase - * was specified, we can't do this because INST_STR_EQ has no - * support for nocase. - */ - - Tcl_Obj *copy = Tcl_NewStringObj(str, length); - - Tcl_IncrRefCount(copy); - exactMatch = TclMatchIsTrivial(TclGetString(copy)); - TclDecrRefCount(copy); - } - PushLiteral(envPtr, str, length); - } else { - SetLineInformation (i+1+nocase); - CompileTokens(envPtr, tokenPtr, interp); - } - tokenPtr = TokenAfter(tokenPtr); - } - - /* - * Push the matcher. - */ - - if (exactMatch) { - TclEmitOpcode(INST_STR_EQ, envPtr); - } else { - TclEmitInstInt1(INST_STR_MATCH, nocase, envPtr); - } - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileStringLenCmd -- - * - * Procedure called to compile the simplest and most common form of the - * "string length" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "string length" - * command at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileStringLenCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - DefineLineInformation; /* TIP #280 */ - Tcl_Token *tokenPtr; - - if (parsePtr->numWords != 2) { - return TCL_ERROR; - } - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { - /* - * Here someone is asking for the length of a static string. Just push - * the actual character (not byte) length. - */ - - char buf[TCL_INTEGER_SPACE]; - int len = Tcl_NumUtfChars(tokenPtr[1].start, tokenPtr[1].size); - - len = sprintf(buf, "%d", len); - PushLiteral(envPtr, buf, len); - } else { - SetLineInformation (1); - CompileTokens(envPtr, tokenPtr, interp); - TclEmitOpcode(INST_STR_LEN, envPtr); - } - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileSwitchCmd -- - * - * Procedure called to compile the "switch" command. - * - * Results: - * Returns TCL_OK for successful compile, or TCL_ERROR to defer - * evaluation to runtime (either when it is too complex to get the - * semantics right, or when we know for sure that it is an error but need - * the error to happen at the right time). - * - * Side effects: - * Instructions are added to envPtr to execute the "switch" command at - * runtime. - * - * FIXME: - * Stack depths are probably not calculated correctly. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileSwitchCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *tokenPtr; /* Pointer to tokens in command. */ - int numWords; /* Number of words in command. */ - - Tcl_Token *valueTokenPtr; /* Token for the value to switch on. */ - enum {Switch_Exact, Switch_Glob, Switch_Regexp} mode; - /* What kind of switch are we doing? */ - - Tcl_Token *bodyTokenArray; /* Array of real pattern list items. */ - Tcl_Token **bodyToken; /* Array of pointers to pattern list items. */ - int *bodyLines; /* Array of line numbers for body list - * items. */ - int** bodyNext; - int foundDefault; /* Flag to indicate whether a "default" clause - * is present. */ - - JumpFixup *fixupArray; /* Array of forward-jump fixup records. */ - int *fixupTargetArray; /* Array of places for fixups to point at. */ - int fixupCount; /* Number of places to fix up. */ - int contFixIndex; /* Where the first of the jumps due to a group - * of continuation bodies starts, or -1 if - * there aren't any. */ - int contFixCount; /* Number of continuation bodies pointing to - * the current (or next) real body. */ - - int savedStackDepth = envPtr->currStackDepth; - int noCase; /* Has the -nocase flag been given? */ - int foundMode = 0; /* Have we seen a mode flag yet? */ - int isListedArms = 0; - int i, valueIndex; - DefineLineInformation; /* TIP #280 */ - int* clNext = envPtr->clNext; - - /* - * Only handle the following versions: - * switch ?--? word {pattern body ...} - * switch -exact ?--? word {pattern body ...} - * switch -glob ?--? word {pattern body ...} - * switch -regexp ?--? word {pattern body ...} - * switch -- word simpleWordPattern simpleWordBody ... - * switch -exact -- word simpleWordPattern simpleWordBody ... - * switch -glob -- word simpleWordPattern simpleWordBody ... - * switch -regexp -- word simpleWordPattern simpleWordBody ... - * When the mode is -glob, can also handle a -nocase flag. + * See if we can generate a sequence of things to concatenate. This + * requires that all the % sequences be %s or %%, as everything else is + * sufficiently complex that we don't bother. * - * First off, we don't care how the command's word was generated; we're - * compiling it anyway! So skip it... - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - valueIndex = 1; - numWords = parsePtr->numWords-1; - - /* - * Check for options. - */ - - noCase = 0; - mode = Switch_Exact; - if (numWords == 2) { - /* - * There's just the switch value and the bodies list. In that case, we - * can skip all option parsing and move on to consider switch values - * and the body list. - */ - - goto finishedOptionParse; - } - - /* - * There must be at least one option, --, because without that there is no - * way to statically avoid the problems you get from strings-to-be-matched - * that start with a - (the interpreted code falls apart if it encounters - * them, so we punt if we *might* encounter them as that is the easiest - * way of emulating the behaviour). + * First, get the state of the system relatively sensible (cleaning up + * after our attempt to spot a literal). */ - for (; numWords>=3 ; tokenPtr=TokenAfter(tokenPtr),numWords--) { - register unsigned size = tokenPtr[1].size; - register const char *chrs = tokenPtr[1].start; - - /* - * We only process literal options, and we assume that -e, -g and -n - * are unique prefixes of -exact, -glob and -nocase respectively (true - * at time of writing). Note that -exact and -glob may only be given - * at most once or we bail out (error case). - */ - - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || size < 2) { - return TCL_ERROR; - } - - if ((size <= 6) && !memcmp(chrs, "-exact", size)) { - if (foundMode) { - return TCL_ERROR; - } - mode = Switch_Exact; - foundMode = 1; - valueIndex++; - continue; - } else if ((size <= 5) && !memcmp(chrs, "-glob", size)) { - if (foundMode) { - return TCL_ERROR; - } - mode = Switch_Glob; - foundMode = 1; - valueIndex++; - continue; - } else if ((size <= 7) && !memcmp(chrs, "-regexp", size)) { - if (foundMode) { - return TCL_ERROR; - } - mode = Switch_Regexp; - foundMode = 1; - valueIndex++; - continue; - } else if ((size <= 7) && !memcmp(chrs, "-nocase", size)) { - noCase = 1; - valueIndex++; - continue; - } else if ((size == 2) && !memcmp(chrs, "--", 2)) { - valueIndex++; - break; - } - - /* - * The switch command has many flags we cannot compile at all (e.g. - * all the RE-related ones) which we must have encountered. Either - * that or we have run off the end. The action here is the same: punt - * to interpreted version. - */ - - return TCL_ERROR; - } - if (numWords < 3) { - return TCL_ERROR; - } - tokenPtr = TokenAfter(tokenPtr); - numWords--; - if (noCase && (mode == Switch_Exact)) { - /* - * Can't compile this case; no opcode for case-insensitive equality! - */ - - return TCL_ERROR; + for (; i>=0 ; i--) { + Tcl_DecrRefCount(objv[i]); } - - /* - * The value to test against is going to always get pushed on the stack. - * But not yet; we need to verify that the rest of the command is - * compilable too. - */ - - finishedOptionParse: - valueTokenPtr = tokenPtr; - /* For valueIndex, see previous loop. */ + ckfree(objv); + tokenPtr = TokenAfter(parsePtr->tokenPtr); tokenPtr = TokenAfter(tokenPtr); - numWords--; + i = 0; /* - * Build an array of tokens for the matcher terms and script bodies. Note - * that in the case of the quoted bodies, this is tricky as we cannot use - * copies of the string from the input token for the generated tokens (it - * causes a crash during exception handling). When multiple tokens are - * available at this point, this is pretty easy. + * Now scan through and check for non-%s and non-%% substitutions. */ - if (numWords == 1) { - Tcl_DString bodyList; - const char **argv = NULL, *tokenStartPtr, *p; - int bline; /* TIP #280: line of the pattern/action list, - * and start of list for when tracking the - * location. This list comes immediately after - * the value we switch on. */ - int isTokenBraced; - - /* - * Test that we've got a suitable body list as a simple (i.e. braced) - * word, and that the elements of the body are simple words too. This - * is really rather nasty indeed. - */ - - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } - - Tcl_DStringInit(&bodyList); - Tcl_DStringAppend(&bodyList, tokenPtr[1].start, tokenPtr[1].size); - if (Tcl_SplitList(NULL, Tcl_DStringValue(&bodyList), &numWords, - &argv) != TCL_OK) { - Tcl_DStringFree(&bodyList); - return TCL_ERROR; - } - Tcl_DStringFree(&bodyList); - - /* - * Now we know what the switch arms are, we've got to see whether we - * can synthesize tokens for the arms. First check whether we've got a - * valid number of arms since we can do that now. - */ - - if (numWords == 0 || numWords % 2) { - ckfree((char *) argv); - return TCL_ERROR; - } - - isListedArms = 1; - bodyTokenArray = (Tcl_Token *) ckalloc(sizeof(Tcl_Token) * numWords); - bodyToken = (Tcl_Token **) ckalloc(sizeof(Tcl_Token *) * numWords); - bodyLines = (int *) ckalloc(sizeof(int) * numWords); - bodyNext = (int **) ckalloc(sizeof(int*) * numWords); - - /* - * Locate the start of the arms within the overall word. - */ - - bline = mapPtr->loc[eclIndex].line[valueIndex+1]; - p = tokenStartPtr = tokenPtr[1].start; - while (isspace(UCHAR(*tokenStartPtr))) { - tokenStartPtr++; - } - if (*tokenStartPtr == '{') { - tokenStartPtr++; - isTokenBraced = 1; - } else { - isTokenBraced = 0; - } - - /* - * TIP #280: Count lines within the literal list. - */ - - for (i=0 ; i<numWords ; i++) { - bodyTokenArray[i].type = TCL_TOKEN_TEXT; - bodyTokenArray[i].start = tokenStartPtr; - bodyTokenArray[i].size = strlen(argv[i]); - bodyTokenArray[i].numComponents = 0; - bodyToken[i] = bodyTokenArray+i; - tokenStartPtr += bodyTokenArray[i].size; - - /* - * Test to see if we have guessed the end of the word correctly; - * if not, we can't feed the real string to the sub-compilation - * engine, and we're then stuck and so have to punt out to doing - * everything at runtime. - */ - - if ((isTokenBraced && *(tokenStartPtr++) != '}') || - (tokenStartPtr < tokenPtr[1].start+tokenPtr[1].size - && !isspace(UCHAR(*tokenStartPtr)))) { - ckfree((char *) argv); - ckfree((char *) bodyToken); - ckfree((char *) bodyTokenArray); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); - return TCL_ERROR; - } - - /* - * TIP #280: Now determine the line the list element starts on - * (there is no need to do it earlier, due to the possibility of - * aborting, see above). - */ - - TclAdvanceLines(&bline, p, bodyTokenArray[i].start); - TclAdvanceContinuations (&bline, &clNext, - bodyTokenArray[i].start - envPtr->source); - bodyLines[i] = bline; - bodyNext[i] = clNext; - p = bodyTokenArray[i].start; - - while (isspace(UCHAR(*tokenStartPtr))) { - tokenStartPtr++; - if (tokenStartPtr >= tokenPtr[1].start+tokenPtr[1].size) { - break; - } - } - if (*tokenStartPtr == '{') { - tokenStartPtr++; - isTokenBraced = 1; - } else { - isTokenBraced = 0; + for (bytes = Tcl_GetString(formatObj) ; *bytes ; bytes++) { + if (*bytes == '%') { + bytes++; + if (*bytes == 's') { + i++; + continue; + } else if (*bytes == '%') { + continue; } - } - ckfree((char *) argv); - - /* - * Check that we've parsed everything we thought we were going to - * parse. If not, something odd is going on (I believe it is possible - * to defeat the code above) and we should bail out. - */ - - if (tokenStartPtr != tokenPtr[1].start+tokenPtr[1].size) { - ckfree((char *) bodyToken); - ckfree((char *) bodyTokenArray); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); + Tcl_DecrRefCount(formatObj); return TCL_ERROR; } - - } else if (numWords % 2 || numWords == 0) { - /* - * Odd number of words (>1) available, or no words at all available. - * Both are error cases, so punt and let the interpreted-version - * generate the error message. Note that the second case probably - * should get caught earlier, but it's easy to check here again anyway - * because it'd cause a nasty crash otherwise. - */ - - return TCL_ERROR; - } else { - /* - * Multi-word definition of patterns & actions. - */ - - bodyToken = (Tcl_Token **) ckalloc(sizeof(Tcl_Token *) * numWords); - bodyLines = (int *) ckalloc(sizeof(int) * numWords); - bodyNext = (int **) ckalloc(sizeof(int*) * numWords); - bodyTokenArray = NULL; - for (i=0 ; i<numWords ; i++) { - /* - * We only handle the very simplest case. Anything more complex is - * a good reason to go to the interpreted case anyway due to - * traces, etc. - */ - - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || - tokenPtr->numComponents != 1) { - ckfree((char *) bodyToken); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); - return TCL_ERROR; - } - bodyToken[i] = tokenPtr+1; - - /* - * TIP #280: Copy line information from regular cmd info. - */ - - bodyLines[i] = mapPtr->loc[eclIndex].line[valueIndex+1+i]; - bodyNext[i] = mapPtr->loc[eclIndex].next[valueIndex+1+i]; - tokenPtr = TokenAfter(tokenPtr); - } } /* - * Fall back to interpreted if the last body is a continuation (it's - * illegal, but this makes the error happen at the right time). + * Check if the number of things to concatenate will fit in a byte. */ - if (bodyToken[numWords-1]->size == 1 && - bodyToken[numWords-1]->start[0] == '-') { - ckfree((char *) bodyToken); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); - if (bodyTokenArray != NULL) { - ckfree((char *) bodyTokenArray); - } + if (i+2 != parsePtr->numWords || i > 125) { + Tcl_DecrRefCount(formatObj); return TCL_ERROR; } /* - * Now we commit to generating code; the parsing stage per se is done. - * First, we push the value we're matching against on the stack. - */ - - SetLineInformation (valueIndex); - CompileTokens(envPtr, valueTokenPtr, interp); - - /* - * Check if we can generate a jump table, since if so that's faster than - * doing an explicit compare with each body. Note that we're definitely - * over-conservative with determining whether we can do the jump table, - * but it handles the most common case well enough. + * Generate the pushes of the things to concatenate, a sequence of + * literals and compiled tokens (of which at least one is non-literal or + * we'd have the case in the first half of this function) which we will + * concatenate. */ - if (isListedArms && mode == Switch_Exact && !noCase) { - JumptableInfo *jtPtr; - int infoIndex, isNew, *finalFixups, numRealBodies = 0, jumpLocation; - int mustGenerate, jumpToDefault; - Tcl_DString buffer; - Tcl_HashEntry *hPtr; - - /* - * Compile the switch by using a jump table, which is basically a - * hashtable that maps from literal values to match against to the - * offset (relative to the INST_JUMP_TABLE instruction) to jump to. - * The jump table itself is independent of any invokation of the - * bytecode, and as such is stored in an auxData block. - * - * Start by allocating the jump table itself, plus some workspace. - */ - - jtPtr = (JumptableInfo *) ckalloc(sizeof(JumptableInfo)); - Tcl_InitHashTable(&jtPtr->hashTable, TCL_STRING_KEYS); - infoIndex = TclCreateAuxData(jtPtr, &tclJumptableInfoType, envPtr); - finalFixups = (int *) ckalloc(sizeof(int) * (numWords/2)); - foundDefault = 0; - mustGenerate = 1; - - /* - * Next, issue the instruction to do the jump, together with what we - * want to do if things do not work out (jump to either the default - * clause or the "default" default, which just sets the result to - * empty). Note that we will come back and rewrite the jump's offset - * parameter when we know what it should be, and that all jumps we - * issue are of the wide kind because that makes the code much easier - * to debug! - */ - - jumpLocation = CurrentOffset(envPtr); - TclEmitInstInt4(INST_JUMP_TABLE, infoIndex, envPtr); - jumpToDefault = CurrentOffset(envPtr); - TclEmitInstInt4(INST_JUMP4, 0, envPtr); - - for (i=0 ; i<numWords ; i+=2) { - /* - * For each arm, we must first work out what to do with the match - * term. - */ + i = 0; /* The count of things to concat. */ + j = 2; /* The index into the argument tokens, for + * TIP#280 handling. */ + start = Tcl_GetString(formatObj); + /* The start of the currently-scanned literal + * in the format string. */ + tmpObj = Tcl_NewObj(); /* The buffer used to accumulate the literal + * being built. */ + for (bytes = start ; *bytes ; bytes++) { + if (*bytes == '%') { + Tcl_AppendToObj(tmpObj, start, bytes - start); + if (*++bytes == '%') { + Tcl_AppendToObj(tmpObj, "%", 1); + } else { + char *b = Tcl_GetStringFromObj(tmpObj, &len); - if (i!=numWords-2 || bodyToken[numWords-2]->size != 7 || - memcmp(bodyToken[numWords-2]->start, "default", 7)) { /* - * This is not a default clause, so insert the current - * location as a target in the jump table (assuming it isn't - * already there, which would indicate that this clause is - * probably masked by an earlier one). Note that we use a - * Tcl_DString here simply because the hash API does not let - * us specify the string length. + * If there is a non-empty literal from the format string, + * push it and reset. */ - Tcl_DStringInit(&buffer); - Tcl_DStringAppend(&buffer, bodyToken[i]->start, - bodyToken[i]->size); - hPtr = Tcl_CreateHashEntry(&jtPtr->hashTable, - Tcl_DStringValue(&buffer), &isNew); - if (isNew) { - /* - * First time we've encountered this match clause, so it - * must point to here. - */ - - Tcl_SetHashValue(hPtr, (ClientData) - (CurrentOffset(envPtr) - jumpLocation)); + if (len > 0) { + PushLiteral(envPtr, b, len); + Tcl_DecrRefCount(tmpObj); + tmpObj = Tcl_NewObj(); + i++; } - Tcl_DStringFree(&buffer); - } else { - /* - * This is a default clause, so patch up the fallthrough from - * the INST_JUMP_TABLE instruction to here. - */ - - foundDefault = 1; - isNew = 1; - TclStoreInt4AtPtr(CurrentOffset(envPtr)-jumpToDefault, - envPtr->codeStart+jumpToDefault+1); - } - - /* - * Now, for each arm we must deal with the body of the clause. - * - * If this is a continuation body (never true of a final clause, - * whether default or not) we're done because the next jump target - * will also point here, so we advance to the next clause. - */ - - if (bodyToken[i+1]->size == 1 && bodyToken[i+1]->start[0] == '-') { - mustGenerate = 1; - continue; - } - - /* - * Also skip this arm if its only match clause is masked. (We - * could probably be more aggressive about this, but that would be - * much more difficult to get right.) - */ - - if (!isNew && !mustGenerate) { - continue; - } - mustGenerate = 0; - - /* - * Compile the body of the arm. - */ - - envPtr->line = bodyLines[i+1]; /* TIP #280 */ - envPtr->clNext = bodyNext[i+1]; /* TIP #280 */ - TclCompileCmdWord(interp, bodyToken[i+1], 1, envPtr); - - /* - * Compile a jump in to the end of the command if this body is - * anything other than a user-supplied default arm (to either skip - * over the remaining bodies or the code that generates an empty - * result). - */ - - if (i+2 < numWords || !foundDefault) { - finalFixups[numRealBodies++] = CurrentOffset(envPtr); /* - * Easier by far to issue this jump as a fixed-width jump. - * Otherwise we'd need to do a lot more (and more awkward) - * rewriting when we fixed this all up. + * Push the code to produce the string that would be + * substituted with %s, except we'll be concatenating + * directly. */ - TclEmitInstInt4(INST_JUMP4, 0, envPtr); + CompileWord(envPtr, tokenPtr, interp, j); + tokenPtr = TokenAfter(tokenPtr); + j++; + i++; } + start = bytes + 1; } - - /* - * We're at the end. If we've not already done so through the - * processing of a user-supplied default clause, add in a "default" - * default clause now. - */ - - if (!foundDefault) { - TclStoreInt4AtPtr(CurrentOffset(envPtr)-jumpToDefault, - envPtr->codeStart+jumpToDefault+1); - PushLiteral(envPtr, "", 0); - } - - /* - * No more instructions to be issued; everything that needs to jump to - * the end of the command is fixed up at this point. - */ - - for (i=0 ; i<numRealBodies ; i++) { - TclStoreInt4AtPtr(CurrentOffset(envPtr)-finalFixups[i], - envPtr->codeStart+finalFixups[i]+1); - } - - /* - * Clean up all our temporary space and return. - */ - - ckfree((char *) finalFixups); - ckfree((char *) bodyToken); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); - if (bodyTokenArray != NULL) { - ckfree((char *) bodyTokenArray); - } - return TCL_OK; } /* - * Generate a test for each arm. + * Handle the case of a trailing literal. */ - contFixIndex = -1; - contFixCount = 0; - fixupArray = (JumpFixup *) ckalloc(sizeof(JumpFixup) * numWords); - fixupTargetArray = (int *) ckalloc(sizeof(int) * numWords); - memset(fixupTargetArray, 0, numWords * sizeof(int)); - fixupCount = 0; - foundDefault = 0; - for (i=0 ; i<numWords ; i+=2) { - int nextArmFixupIndex = -1; - - envPtr->currStackDepth = savedStackDepth + 1; - if (i!=numWords-2 || bodyToken[numWords-2]->size != 7 || - memcmp(bodyToken[numWords-2]->start, "default", 7)) { - /* - * Generate the test for the arm. - */ - - switch (mode) { - case Switch_Exact: - TclEmitOpcode(INST_DUP, envPtr); - TclCompileTokens(interp, bodyToken[i], 1, envPtr); - TclEmitOpcode(INST_STR_EQ, envPtr); - break; - case Switch_Glob: - TclCompileTokens(interp, bodyToken[i], 1, envPtr); - TclEmitInstInt4(INST_OVER, 1, envPtr); - TclEmitInstInt1(INST_STR_MATCH, noCase, envPtr); - break; - case Switch_Regexp: { - int simple = 0, exact = 0; - - /* - * Keep in sync with TclCompileRegexpCmd. - */ - - if (bodyToken[i]->type == TCL_TOKEN_TEXT) { - Tcl_DString ds; - - if (bodyToken[i]->size == 0) { - /* - * The semantics of regexps are that they always match - * when the RE == "". - */ - - PushLiteral(envPtr, "1", 1); - break; - } - - /* - * Attempt to convert pattern to glob. If successful, push - * the converted pattern. - */ - - if (TclReToGlob(NULL, bodyToken[i]->start, - bodyToken[i]->size, &ds, &exact) == TCL_OK) { - simple = 1; - PushLiteral(envPtr, Tcl_DStringValue(&ds), - Tcl_DStringLength(&ds)); - Tcl_DStringFree(&ds); - } - } - if (!simple) { - TclCompileTokens(interp, bodyToken[i], 1, envPtr); - } - - TclEmitInstInt4(INST_OVER, 1, envPtr); - if (simple) { - if (exact && !noCase) { - TclEmitOpcode(INST_STR_EQ, envPtr); - } else { - TclEmitInstInt1(INST_STR_MATCH, noCase, envPtr); - } - } else { - /* - * Pass correct RE compile flags. We use only Int1 - * (8-bit), but that handles all the flags we want to - * pass. Don't use TCL_REG_NOSUB as we may have backrefs - * or capture vars. - */ - - int cflags = TCL_REG_ADVANCED - | (noCase ? TCL_REG_NOCASE : 0); - - TclEmitInstInt1(INST_REGEXP, cflags, envPtr); - } - break; - } - default: - Tcl_Panic("unknown switch mode: %d", mode); - } - - /* - * In a fall-through case, we will jump on _true_ to the place - * where the body starts (generated later, with guarantee of this - * ensured earlier; the final body is never a fall-through). - */ - - if (bodyToken[i+1]->size==1 && bodyToken[i+1]->start[0]=='-') { - if (contFixIndex == -1) { - contFixIndex = fixupCount; - contFixCount = 0; - } - TclEmitForwardJump(envPtr, TCL_TRUE_JUMP, - fixupArray+contFixIndex+contFixCount); - fixupCount++; - contFixCount++; - continue; - } - - TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, fixupArray+fixupCount); - nextArmFixupIndex = fixupCount; - fixupCount++; - } else { - /* - * Got a default clause; set a flag to inhibit the generation of - * the jump after the body and the cleanup of the intermediate - * value that we are switching against. - * - * Note that default clauses (which are always terminal clauses) - * cannot be fall-through clauses as well, since the last clause - * is never a fall-through clause (which we have already - * verified). - */ - - foundDefault = 1; - } - - /* - * Generate the body for the arm. This is guaranteed not to be a - * fall-through case, but it might have preceding fall-through cases, - * so we must process those first. - */ - - if (contFixIndex != -1) { - int j; - - for (j=0 ; j<contFixCount ; j++) { - fixupTargetArray[contFixIndex+j] = CurrentOffset(envPtr); - } - contFixIndex = -1; - } + Tcl_AppendToObj(tmpObj, start, bytes - start); + bytes = Tcl_GetStringFromObj(tmpObj, &len); + if (len > 0) { + PushLiteral(envPtr, bytes, len); + i++; + } + Tcl_DecrRefCount(tmpObj); + Tcl_DecrRefCount(formatObj); + if (i > 1) { /* - * Now do the actual compilation. Note that we do not use CompileBody - * because we may have synthesized the tokens in a non-standard - * pattern. + * Do the concatenation, which produces the result. */ - TclEmitOpcode(INST_POP, envPtr); - envPtr->currStackDepth = savedStackDepth + 1; - envPtr->line = bodyLines[i+1]; /* TIP #280 */ - envPtr->clNext = bodyNext[i+1]; /* TIP #280 */ - TclCompileCmdWord(interp, bodyToken[i+1], 1, envPtr); - - if (!foundDefault) { - TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, - fixupArray+fixupCount); - fixupCount++; - fixupTargetArray[nextArmFixupIndex] = CurrentOffset(envPtr); - } - } - - /* - * Clean up all our temporary space and return. - */ - - ckfree((char *) bodyToken); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); - if (bodyTokenArray != NULL) { - ckfree((char *) bodyTokenArray); - } - - /* - * Discard the value we are matching against unless we've had a default - * clause (in which case it will already be gone due to the code at the - * start of processing an arm, guaranteed) and make the result of the - * command an empty string. - */ - - if (!foundDefault) { - TclEmitOpcode(INST_POP, envPtr); - PushLiteral(envPtr, "", 0); - } - - /* - * Do jump fixups for arms that were executed. First, fill in the jumps of - * all jumps that don't point elsewhere to point to here. - */ - - for (i=0 ; i<fixupCount ; i++) { - if (fixupTargetArray[i] == 0) { - fixupTargetArray[i] = envPtr->codeNext-envPtr->codeStart; - } - } - - /* - * Now scan backwards over all the jumps (all of which are forward jumps) - * doing each one. When we do one and there is a size changes, we must - * scan back over all the previous ones and see if they need adjusting - * before proceeding with further jump fixups (the interleaved nature of - * all the jumps makes this impossible to do without nested loops). - */ - - for (i=fixupCount-1 ; i>=0 ; i--) { - if (TclFixupForwardJump(envPtr, &fixupArray[i], - fixupTargetArray[i] - fixupArray[i].codeOffset, 127)) { - int j; - - for (j=i-1 ; j>=0 ; j--) { - if (fixupTargetArray[j] > fixupArray[i].codeOffset) { - fixupTargetArray[j] += 3; - } - } - } - } - ckfree((char *) fixupArray); - ckfree((char *) fixupTargetArray); - - envPtr->currStackDepth = savedStackDepth + 1; - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * DupJumptableInfo, FreeJumptableInfo -- - * - * Functions to duplicate, release and print a jump-table created for use - * with the INST_JUMP_TABLE instruction. - * - * Results: - * DupJumptableInfo: a copy of the jump-table - * FreeJumptableInfo: none - * PrintJumptableInfo: none - * - * Side effects: - * DupJumptableInfo: allocates memory - * FreeJumptableInfo: releases memory - * PrintJumptableInfo: none - * - *---------------------------------------------------------------------- - */ - -static ClientData -DupJumptableInfo( - ClientData clientData) -{ - JumptableInfo *jtPtr = clientData; - JumptableInfo *newJtPtr = (JumptableInfo *) - ckalloc(sizeof(JumptableInfo)); - Tcl_HashEntry *hPtr, *newHPtr; - Tcl_HashSearch search; - int isNew; - - Tcl_InitHashTable(&newJtPtr->hashTable, TCL_STRING_KEYS); - hPtr = Tcl_FirstHashEntry(&jtPtr->hashTable, &search); - while (hPtr != NULL) { - newHPtr = Tcl_CreateHashEntry(&newJtPtr->hashTable, - Tcl_GetHashKey(&jtPtr->hashTable, hPtr), &isNew); - Tcl_SetHashValue(newHPtr, Tcl_GetHashValue(hPtr)); - } - return newJtPtr; -} - -static void -FreeJumptableInfo( - ClientData clientData) -{ - JumptableInfo *jtPtr = clientData; - - Tcl_DeleteHashTable(&jtPtr->hashTable); - ckfree((char *) jtPtr); -} - -static void -PrintJumptableInfo( - ClientData clientData, - Tcl_Obj *appendObj, - ByteCode *codePtr, - unsigned int pcOffset) -{ - register JumptableInfo *jtPtr = clientData; - Tcl_HashEntry *hPtr; - Tcl_HashSearch search; - const char *keyPtr; - int offset, i = 0; - - hPtr = Tcl_FirstHashEntry(&jtPtr->hashTable, &search); - for (; hPtr ; hPtr = Tcl_NextHashEntry(&search)) { - keyPtr = Tcl_GetHashKey(&jtPtr->hashTable, hPtr); - offset = PTR2INT(Tcl_GetHashValue(hPtr)); - - if (i++) { - Tcl_AppendToObj(appendObj, ", ", -1); - if (i%4==0) { - Tcl_AppendToObj(appendObj, "\n\t\t", -1); - } - } - Tcl_AppendPrintfToObj(appendObj, "\"%s\"->pc %d", - keyPtr, pcOffset + offset); - } -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileWhileCmd -- - * - * Procedure called to compile the "while" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "while" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileWhileCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *testTokenPtr, *bodyTokenPtr; - JumpFixup jumpEvalCondFixup; - int testCodeOffset, bodyCodeOffset, jumpDist, range, code, boolVal; - int savedStackDepth = envPtr->currStackDepth; - int loopMayEnd = 1; /* This is set to 0 if it is recognized as an - * infinite loop. */ - Tcl_Obj *boolObj; - DefineLineInformation; /* TIP #280 */ - - if (parsePtr->numWords != 3) { - return TCL_ERROR; - } - - /* - * If the test expression requires substitutions, don't compile the while - * command inline. E.g., the expression might cause the loop to never - * execute or execute forever, as in "while "$x < 5" {}". - * - * Bail out also if the body expression requires substitutions in order to - * insure correct behaviour [Bug 219166] - */ - - testTokenPtr = TokenAfter(parsePtr->tokenPtr); - bodyTokenPtr = TokenAfter(testTokenPtr); - - if ((testTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) - || (bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD)) { - return TCL_ERROR; - } - - /* - * Find out if the condition is a constant. - */ - - boolObj = Tcl_NewStringObj(testTokenPtr[1].start, testTokenPtr[1].size); - Tcl_IncrRefCount(boolObj); - code = Tcl_GetBooleanFromObj(NULL, boolObj, &boolVal); - TclDecrRefCount(boolObj); - if (code == TCL_OK) { - if (boolVal) { - /* - * It is an infinite loop; flag it so that we generate a more - * efficient body. - */ - - loopMayEnd = 0; - } else { - /* - * This is an empty loop: "while 0 {...}" or such. Compile no - * bytecodes. - */ - - goto pushResult; - } - } - - /* - * Create a ExceptionRange record for the loop body. This is used to - * implement break and continue. - */ - - range = DeclareExceptionRange(envPtr, LOOP_EXCEPTION_RANGE); - - /* - * Jump to the evaluation of the condition. This code uses the "loop - * rotation" optimisation (which eliminates one branch from the loop). - * "while cond body" produces then: - * goto A - * B: body : bodyCodeOffset - * A: cond -> result : testCodeOffset, continueOffset - * if (result) goto B - * - * The infinite loop "while 1 body" produces: - * B: body : all three offsets here - * goto B - */ - - if (loopMayEnd) { - TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpEvalCondFixup); - testCodeOffset = 0; /* Avoid compiler warning. */ + TclEmitInstInt1(INST_STR_CONCAT1, i, envPtr); } else { /* - * Make sure that the first command in the body is preceded by an - * INST_START_CMD, and hence counted properly. [Bug 1752146] + * EVIL HACK! Force there to be a string representation in the case + * where there's just a "%s" in the format; case covered by the test + * format-20.1 (and it is horrible...) */ - envPtr->atCmdStart = 0; - testCodeOffset = CurrentOffset(envPtr); - } - - /* - * Compile the loop body. - */ - - SetLineInformation (2); - bodyCodeOffset = ExceptionRangeStarts(envPtr, range); - CompileBody(envPtr, bodyTokenPtr, interp); - ExceptionRangeEnds(envPtr, range); - envPtr->currStackDepth = savedStackDepth + 1; - TclEmitOpcode(INST_POP, envPtr); - - /* - * Compile the test expression then emit the conditional jump that - * terminates the while. We already know it's a simple word. - */ - - if (loopMayEnd) { - testCodeOffset = CurrentOffset(envPtr); - jumpDist = testCodeOffset - jumpEvalCondFixup.codeOffset; - if (TclFixupForwardJump(envPtr, &jumpEvalCondFixup, jumpDist, 127)) { - bodyCodeOffset += 3; - testCodeOffset += 3; - } - envPtr->currStackDepth = savedStackDepth; - SetLineInformation (1); - TclCompileExprWords(interp, testTokenPtr, 1, envPtr); - envPtr->currStackDepth = savedStackDepth + 1; - - jumpDist = CurrentOffset(envPtr) - bodyCodeOffset; - if (jumpDist > 127) { - TclEmitInstInt4(INST_JUMP_TRUE4, -jumpDist, envPtr); - } else { - TclEmitInstInt1(INST_JUMP_TRUE1, -jumpDist, envPtr); - } - } else { - jumpDist = CurrentOffset(envPtr) - bodyCodeOffset; - if (jumpDist > 127) { - TclEmitInstInt4(INST_JUMP4, -jumpDist, envPtr); - } else { - TclEmitInstInt1(INST_JUMP1, -jumpDist, envPtr); - } + TclEmitOpcode(INST_DUP, envPtr); + PushStringLiteral(envPtr, ""); + TclEmitOpcode(INST_STR_EQ, envPtr); + TclEmitOpcode(INST_POP, envPtr); } - - /* - * Set the loop's body, continue and break offsets. - */ - - envPtr->exceptArrayPtr[range].continueOffset = testCodeOffset; - envPtr->exceptArrayPtr[range].codeOffset = bodyCodeOffset; - ExceptionRangeTarget(envPtr, range, breakOffset); - - /* - * The while command's result is an empty string. - */ - - pushResult: - envPtr->currStackDepth = savedStackDepth; - PushLiteral(envPtr, "", 0); return TCL_OK; } /* *---------------------------------------------------------------------- * - * PushVarName -- + * TclPushVarName -- * * Procedure used in the compiling where pushing a variable name is * necessary (append, lappend, set). * * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * The values written to *localIndexPtr and *isScalarPtr signal to + * the caller what the instructions emitted by this routine will do: + * + * *isScalarPtr (*localIndexPtr < 0) + * 1 1 Push the varname on the stack. (Stack +1) + * 1 0 *localIndexPtr is the index of the compiled + * local for this varname. No instructions + * emitted. (Stack +0) + * 0 1 Push part1 and part2 names of array element + * on the stack. (Stack +2) + * 0 0 *localIndexPtr is the index of the compiled + * local for this array. Element name is pushed + * on the stack. (Stack +1) * * Side effects: - * Instructions are added to envPtr to execute the "set" command at - * runtime. + * Instructions are added to envPtr. * *---------------------------------------------------------------------- */ -static int -PushVarName( +void +TclPushVarName( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Token *varTokenPtr, /* Points to a variable token. */ CompileEnv *envPtr, /* Holds resulting instructions. */ - int flags, /* TCL_CREATE_VAR or TCL_NO_LARGE_INDEX. */ + int flags, /* TCL_NO_LARGE_INDEX | TCL_NO_ELEMENT. */ int *localIndexPtr, /* Must not be NULL. */ - int *simpleVarNamePtr, /* Must not be NULL. */ - int *isScalarPtr, /* Must not be NULL. */ - int line, /* Line the token starts on. */ - int* clNext) /* Reference to offset of next hidden cont. line */ + int *isScalarPtr) /* Must not be NULL. */ { register const char *p; const char *name, *elName; @@ -4961,8 +3211,7 @@ PushVarName( * assemble the corresponding token. */ - elemTokenPtr = (Tcl_Token *) TclStackAlloc(interp, - sizeof(Tcl_Token)); + elemTokenPtr = TclStackAlloc(interp, sizeof(Tcl_Token)); allocedTokens = 1; elemTokenPtr->type = TCL_TOKEN_TEXT; elemTokenPtr->start = elName; @@ -4975,7 +3224,6 @@ PushVarName( && (varTokenPtr[1].type == TCL_TOKEN_TEXT) && (varTokenPtr[n].type == TCL_TOKEN_TEXT) && (varTokenPtr[n].start[varTokenPtr[n].size - 1] == ')')) { - /* * Check for parentheses inside first token. */ @@ -4998,9 +3246,9 @@ PushVarName( */ if (varTokenPtr[n].size == 1) { - --n; + n--; } else { - --varTokenPtr[n].size; + varTokenPtr[n].size--; removedParen = n; } @@ -5008,7 +3256,7 @@ PushVarName( nameChars = p - varTokenPtr[1].start; elName = p + 1; remainingChars = (varTokenPtr[2].start - p) - 1; - elNameChars = (varTokenPtr[n].start - p) + varTokenPtr[n].size - 2; + elNameChars = (varTokenPtr[n].start-p) + varTokenPtr[n].size - 2; if (remainingChars) { /* @@ -5016,8 +3264,7 @@ PushVarName( * token. */ - elemTokenPtr = (Tcl_Token *) TclStackAlloc(interp, - n * sizeof(Tcl_Token)); + elemTokenPtr = TclStackAlloc(interp, n * sizeof(Tcl_Token)); allocedTokens = 1; elemTokenPtr->type = TCL_TOKEN_TEXT; elemTokenPtr->start = elName; @@ -5048,6 +3295,7 @@ PushVarName( */ int hasNsQualifiers = 0; + for (i = 0, p = name; i < nameChars; i++, p++) { if ((*p == ':') && ((i+1) < nameChars) && (*(p+1) == ':')) { hasNsQualifiers = 1; @@ -5061,10 +3309,8 @@ PushVarName( * push its name and look it up at runtime. */ - if ((envPtr->procPtr != NULL) && !hasNsQualifiers) { - localIndex = TclFindCompiledLocal(name, nameChars, - /*create*/ flags & TCL_CREATE_VAR, - envPtr->procPtr); + if (!hasNsQualifiers) { + localIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr); if ((flags & TCL_NO_LARGE_INDEX) && (localIndex > 255)) { /* * We'll push the name. @@ -5078,16 +3324,16 @@ PushVarName( } /* - * Compile the element script, if any. + * Compile the element script, if any, and only if not inhibited. [Bug + * 3600328] */ - if (elName != NULL) { + if (elName != NULL && !(flags & TCL_NO_ELEMENT)) { if (elNameChars) { - envPtr->line = line; - envPtr->clNext = clNext; - TclCompileTokens(interp, elemTokenPtr, elemTokenCount, envPtr); + TclCompileTokens(interp, elemTokenPtr, elemTokenCount, + envPtr); } else { - PushLiteral(envPtr, "", 0); + PushStringLiteral(envPtr, ""); } } } else { @@ -5095,1404 +3341,17 @@ PushVarName( * The var name isn't simple: compile and push it. */ - envPtr->line = line; - envPtr->clNext = clNext; CompileTokens(envPtr, varTokenPtr, interp); } if (removedParen) { - ++varTokenPtr[removedParen].size; + varTokenPtr[removedParen].size++; } if (allocedTokens) { TclStackFree(interp, elemTokenPtr); } *localIndexPtr = localIndex; - *simpleVarNamePtr = simpleVarName; *isScalarPtr = (elName == NULL); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * CompileUnaryOpCmd -- - * - * Utility routine to compile the unary operator commands. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the compiled command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -static int -CompileUnaryOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - int instruction, - CompileEnv *envPtr) -{ - Tcl_Token *tokenPtr; - DefineLineInformation; /* TIP #280 */ - - if (parsePtr->numWords != 2) { - return TCL_ERROR; - } - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - TclEmitOpcode(instruction, envPtr); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * CompileAssociativeBinaryOpCmd -- - * - * Utility routine to compile the binary operator commands that accept an - * arbitrary number of arguments, and that are associative operations. - * Because of the associativity, we may combine operations from right to - * left, saving us any effort of re-ordering the arguments on the stack - * after substitutions are completed. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the compiled command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -static int -CompileAssociativeBinaryOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - const char *identity, - int instruction, - CompileEnv *envPtr) -{ - Tcl_Token *tokenPtr = parsePtr->tokenPtr; - DefineLineInformation; /* TIP #280 */ - int words; - - for (words=1 ; words<parsePtr->numWords ; words++) { - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, words); - } - if (parsePtr->numWords <= 2) { - PushLiteral(envPtr, identity, -1); - words++; - } - if (words > 3) { - /* - * Reverse order of arguments to get precise agreement with - * [expr] in calcuations, including roundoff errors. - */ - TclEmitInstInt4(INST_REVERSE, words-1, envPtr); - } - while (--words > 1) { - TclEmitOpcode(instruction, envPtr); - } - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * CompileStrictlyBinaryOpCmd -- - * - * Utility routine to compile the binary operator commands, that strictly - * accept exactly two arguments. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the compiled command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -static int -CompileStrictlyBinaryOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - int instruction, - CompileEnv *envPtr) -{ - if (parsePtr->numWords != 3) { - return TCL_ERROR; - } - return CompileAssociativeBinaryOpCmd(interp, parsePtr, - NULL, instruction, envPtr); -} - -/* - *---------------------------------------------------------------------- - * - * CompileComparisonOpCmd -- - * - * Utility routine to compile the n-ary comparison operator commands. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the compiled command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -static int -CompileComparisonOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - int instruction, - CompileEnv *envPtr) -{ - Tcl_Token *tokenPtr; - DefineLineInformation; /* TIP #280 */ - - if (parsePtr->numWords < 3) { - PushLiteral(envPtr, "1", 1); - } else if (parsePtr->numWords == 3) { - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 2); - TclEmitOpcode(instruction, envPtr); - } else if (envPtr->procPtr == NULL) { - /* - * No local variable space! - */ - - return TCL_ERROR; - } else { - int tmpIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr->procPtr); - int words; - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 2); - if (tmpIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, tmpIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, tmpIndex, envPtr); - } - TclEmitOpcode(instruction, envPtr); - for (words=3 ; words<parsePtr->numWords ;) { - if (tmpIndex <= 255) { - TclEmitInstInt1(INST_LOAD_SCALAR1, tmpIndex, envPtr); - } else { - TclEmitInstInt4(INST_LOAD_SCALAR4, tmpIndex, envPtr); - } - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, words); - if (++words < parsePtr->numWords) { - if (tmpIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, tmpIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, tmpIndex, envPtr); - } - } - TclEmitOpcode(instruction, envPtr); - } - for (; words>3 ; words--) { - TclEmitOpcode(INST_BITAND, envPtr); - } - - /* - * Drop the value from the temp variable; retaining that reference - * might be expensive elsewhere. - */ - - PushLiteral(envPtr, "", 0); - if (tmpIndex <= 255) { - TclEmitInstInt1(INST_STORE_SCALAR1, tmpIndex, envPtr); - } else { - TclEmitInstInt4(INST_STORE_SCALAR4, tmpIndex, envPtr); - } - TclEmitOpcode(INST_POP, envPtr); - } - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompile*OpCmd -- - * - * Procedures called to compile the corresponding "::tcl::mathop::*" - * commands. These are all wrappers around the utility operator command - * compiler functions, except for the compilers for subtraction and - * division, which are special. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the compiled command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileInvertOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileUnaryOpCmd(interp, parsePtr, INST_BITNOT, envPtr); -} - -int -TclCompileNotOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileUnaryOpCmd(interp, parsePtr, INST_LNOT, envPtr); -} - -int -TclCompileAddOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileAssociativeBinaryOpCmd(interp, parsePtr, "0", INST_ADD, - envPtr); -} - -int -TclCompileMulOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileAssociativeBinaryOpCmd(interp, parsePtr, "1", INST_MULT, - envPtr); -} - -int -TclCompileAndOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileAssociativeBinaryOpCmd(interp, parsePtr, "-1", INST_BITAND, - envPtr); -} - -int -TclCompileOrOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileAssociativeBinaryOpCmd(interp, parsePtr, "0", INST_BITOR, - envPtr); -} - -int -TclCompileXorOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileAssociativeBinaryOpCmd(interp, parsePtr, "0", INST_BITXOR, - envPtr); -} - -int -TclCompilePowOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - /* - * This one has its own implementation because the ** operator is - * the only one with right associativity. - */ - Tcl_Token *tokenPtr = parsePtr->tokenPtr; - DefineLineInformation; /* TIP #280 */ - int words; - - for (words=1 ; words<parsePtr->numWords ; words++) { - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, words); - } - if (parsePtr->numWords <= 2) { - PushLiteral(envPtr, "1", 1); - words++; - } - while (--words > 1) { - TclEmitOpcode(INST_EXPON, envPtr); - } - return TCL_OK; -} - -int -TclCompileLshiftOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_LSHIFT, envPtr); -} - -int -TclCompileRshiftOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_RSHIFT, envPtr); -} - -int -TclCompileModOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_MOD, envPtr); -} - -int -TclCompileNeqOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_NEQ, envPtr); -} - -int -TclCompileStrneqOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_STR_NEQ, envPtr); -} - -int -TclCompileInOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_LIST_IN, envPtr); -} - -int -TclCompileNiOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileStrictlyBinaryOpCmd(interp, parsePtr, INST_LIST_NOT_IN, - envPtr); -} - -int -TclCompileLessOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileComparisonOpCmd(interp, parsePtr, INST_LT, envPtr); -} - -int -TclCompileLeqOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileComparisonOpCmd(interp, parsePtr, INST_LE, envPtr); -} - -int -TclCompileGreaterOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileComparisonOpCmd(interp, parsePtr, INST_GT, envPtr); -} - -int -TclCompileGeqOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileComparisonOpCmd(interp, parsePtr, INST_GE, envPtr); -} - -int -TclCompileEqOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileComparisonOpCmd(interp, parsePtr, INST_EQ, envPtr); -} - -int -TclCompileStreqOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - return CompileComparisonOpCmd(interp, parsePtr, INST_STR_EQ, envPtr); -} - -int -TclCompileMinusOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - Tcl_Token *tokenPtr = parsePtr->tokenPtr; - DefineLineInformation; /* TIP #280 */ - int words; - - if (parsePtr->numWords == 1) { - /* Fallback to direct eval to report syntax error */ - return TCL_ERROR; - } - for (words=1 ; words<parsePtr->numWords ; words++) { - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, words); - } - if (words == 2) { - TclEmitOpcode(INST_UMINUS, envPtr); - return TCL_OK; - } - if (words == 3) { - TclEmitOpcode(INST_SUB, envPtr); - return TCL_OK; - } - /* - * Reverse order of arguments to get precise agreement with - * [expr] in calcuations, including roundoff errors. - */ - TclEmitInstInt4(INST_REVERSE, words-1, envPtr); - while (--words > 1) { - TclEmitInstInt4(INST_REVERSE, 2, envPtr); - TclEmitOpcode(INST_SUB, envPtr); - } - return TCL_OK; -} - -int -TclCompileDivOpCmd( - Tcl_Interp *interp, - Tcl_Parse *parsePtr, - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) -{ - Tcl_Token *tokenPtr = parsePtr->tokenPtr; - DefineLineInformation; /* TIP #280 */ - int words; - - if (parsePtr->numWords == 1) { - /* Fallback to direct eval to report syntax error */ - return TCL_ERROR; - } - if (parsePtr->numWords == 2) { - PushLiteral(envPtr, "1.0", 3); - } - for (words=1 ; words<parsePtr->numWords ; words++) { - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, words); - } - if (words <= 3) { - TclEmitOpcode(INST_DIV, envPtr); - return TCL_OK; - } - /* - * Reverse order of arguments to get precise agreement with - * [expr] in calcuations, including roundoff errors. - */ - TclEmitInstInt4(INST_REVERSE, words-1, envPtr); - while (--words > 1) { - TclEmitInstInt4(INST_REVERSE, 2, envPtr); - TclEmitOpcode(INST_DIV, envPtr); - } - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * IndexTailVarIfKnown -- - * - * Procedure used in compiling [global] and [variable] commands. It - * inspects the variable name described by varTokenPtr and, if the tail - * is known at compile time, defines a corresponding local variable. - * - * Results: - * Returns the variable's index in the table of compiled locals if the - * tail is known at compile time, or -1 otherwise. - * - * Side effects: - * None. - * - *---------------------------------------------------------------------- - */ - -static int -IndexTailVarIfKnown( - Tcl_Interp *interp, - Tcl_Token *varTokenPtr, /* Token representing the variable name */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Obj *tailPtr; - const char *tailName, *p; - int len, n = varTokenPtr->numComponents; - Tcl_Token *lastTokenPtr; - int full, localIndex; - - /* - * Determine if the tail is (a) known at compile time, and (b) not an - * array element. Should any of these fail, return an error so that - * the non-compiled command will be called at runtime. - * In order for the tail to be known at compile time, the last token - * in the word has to be constant and contain "::" if it is not the - * only one. - */ - - if (envPtr->procPtr == NULL) { - return -1; - } - - TclNewObj(tailPtr); - if (TclWordKnownAtCompileTime(varTokenPtr, tailPtr)) { - full = 1; - lastTokenPtr = varTokenPtr; - } else { - full = 0; - lastTokenPtr = varTokenPtr + n; - if (!TclWordKnownAtCompileTime(lastTokenPtr, tailPtr)) { - Tcl_DecrRefCount(tailPtr); - return -1; - } - } - - tailName = TclGetStringFromObj(tailPtr, &len); - - if (len) { - if (*(tailName+len-1) == ')') { - /* - * Possible array: bail out - */ - - Tcl_DecrRefCount(tailPtr); - return -1; - } - - /* - * Get the tail: immediately after the last '::' - */ - - for(p = tailName + len -1; p > tailName; p--) { - if ((*p == ':') && (*(p-1) == ':')) { - p++; - break; - } - } - if (!full && (p == tailName)) { - /* - * No :: in the last component - */ - Tcl_DecrRefCount(tailPtr); - return -1; - } - len -= p - tailName; - tailName = p; - } - - localIndex = TclFindCompiledLocal(tailName, len, - /*create*/ TCL_CREATE_VAR, - envPtr->procPtr); - Tcl_DecrRefCount(tailPtr); - return localIndex; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileUpvarCmd -- - * - * Procedure called to compile the "upvar" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "upvar" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileUpvarCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *tokenPtr, *otherTokenPtr, *localTokenPtr; - int simpleVarName, isScalar, localIndex, numWords, i; - DefineLineInformation; /* TIP #280 */ - Tcl_Obj *objPtr = Tcl_NewObj(); - - if (envPtr->procPtr == NULL) { - Tcl_DecrRefCount(objPtr); - return TCL_ERROR; - } - - numWords = parsePtr->numWords; - if (numWords < 3) { - Tcl_DecrRefCount(objPtr); - return TCL_ERROR; - } - - /* - * Push the frame index if it is known at compile time - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - if(TclWordKnownAtCompileTime(tokenPtr, objPtr)) { - CallFrame *framePtr; - Tcl_ObjType *newTypePtr, *typePtr = objPtr->typePtr; - - /* - * Attempt to convert to a level reference. Note that TclObjGetFrame - * only changes the obj type when a conversion was successful. - */ - - TclObjGetFrame(interp, objPtr, &framePtr); - newTypePtr = objPtr->typePtr; - Tcl_DecrRefCount(objPtr); - - if (newTypePtr != typePtr) { - if(numWords%2) { - return TCL_ERROR; - } - CompileWord(envPtr, tokenPtr, interp, 1); - otherTokenPtr = TokenAfter(tokenPtr); - i = 4; - } else { - if(!(numWords%2)) { - return TCL_ERROR; - } - PushLiteral(envPtr, "1", 1); - otherTokenPtr = tokenPtr; - i = 3; - } - } else { - Tcl_DecrRefCount(objPtr); - return TCL_ERROR; - } - - /* - * Loop over the (otherVar, thisVar) pairs. If any of the thisVar is not a - * local variable, return an error so that the non-compiled command will - * be called at runtime. - */ - - for(; i<=numWords; i+=2, otherTokenPtr = TokenAfter(localTokenPtr)) { - localTokenPtr = TokenAfter(otherTokenPtr); - - CompileWord(envPtr, otherTokenPtr, interp, 1); - PushVarNameWord(interp, localTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); - - if((localIndex < 0) || !isScalar) { - return TCL_ERROR; - } - TclEmitInstInt4(INST_UPVAR, localIndex, envPtr); - } - - /* - * Pop the frame index, and set the result to empty - */ - - TclEmitOpcode(INST_POP, envPtr); - PushLiteral(envPtr, "", 0); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileNamespaceCmd -- - * - * Procedure called to compile the "namespace" command; currently, only - * the subcommand "namespace upvar" is compiled to bytecodes. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "namespace upvar" - * command at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileNamespaceCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *tokenPtr, *otherTokenPtr, *localTokenPtr; - int simpleVarName, isScalar, localIndex, numWords, i; - DefineLineInformation; /* TIP #280 */ - - if (envPtr->procPtr == NULL) { - return TCL_ERROR; - } - - /* - * Only compile [namespace upvar ...]: needs an odd number of args, >=5 - */ - - numWords = parsePtr->numWords; - if (!(numWords%2) || (numWords < 5)) { - return TCL_ERROR; - } - - /* - * Check if the second argument is "upvar" - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - if ((tokenPtr->size != 5) /* 5 == strlen("upvar") */ - || strncmp(tokenPtr->start, "upvar", 5)) { - return TCL_ERROR; - } - - /* - * Push the namespace - */ - - tokenPtr = TokenAfter(tokenPtr); - CompileWord(envPtr, tokenPtr, interp, 1); - - /* - * Loop over the (otherVar, thisVar) pairs. If any of the thisVar is not a - * local variable, return an error so that the non-compiled command will - * be called at runtime. - */ - - localTokenPtr = tokenPtr; - for(i=4; i<=numWords; i+=2) { - otherTokenPtr = TokenAfter(localTokenPtr); - localTokenPtr = TokenAfter(otherTokenPtr); - - CompileWord(envPtr, otherTokenPtr, interp, 1); - PushVarNameWord(interp, localTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); - - if((localIndex < 0) || !isScalar) { - return TCL_ERROR; - } - TclEmitInstInt4(INST_NSUPVAR, localIndex, envPtr); - } - - /* - * Pop the namespace, and set the result to empty - */ - - TclEmitOpcode(INST_POP, envPtr); - PushLiteral(envPtr, "", 0); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileGlobalCmd -- - * - * Procedure called to compile the "global" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "global" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileGlobalCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *varTokenPtr; - int localIndex, numWords, i; - DefineLineInformation; /* TIP #280 */ - - numWords = parsePtr->numWords; - if (numWords < 2) { - return TCL_ERROR; - } - - /* - * 'global' has no effect outside of proc bodies; handle that at runtime - */ - - if (envPtr->procPtr == NULL) { - return TCL_ERROR; - } - - /* - * Push the namespace - */ - - PushLiteral(envPtr, "::", 2); - - /* - * Loop over the variables. - */ - - varTokenPtr = TokenAfter(parsePtr->tokenPtr); - for(i=2; i<=numWords; varTokenPtr = TokenAfter(varTokenPtr),i++) { - localIndex = IndexTailVarIfKnown(interp, varTokenPtr, envPtr); - - if(localIndex < 0) { - return TCL_ERROR; - } - - CompileWord(envPtr, varTokenPtr, interp, 1); - TclEmitInstInt4(INST_NSUPVAR, localIndex, envPtr); - } - - /* - * Pop the namespace, and set the result to empty - */ - - TclEmitOpcode(INST_POP, envPtr); - PushLiteral(envPtr, "", 0); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileVariableCmd -- - * - * Procedure called to compile the "variable" command. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "variable" command at - * runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileVariableCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *varTokenPtr, *valueTokenPtr; - int localIndex, numWords, i; - DefineLineInformation; /* TIP #280 */ - - numWords = parsePtr->numWords; - if (numWords < 2) { - return TCL_ERROR; - } - - /* - * Bail out if not compiling a proc body - */ - - if (envPtr->procPtr == NULL) { - return TCL_ERROR; - } - - /* - * Loop over the (var, value) pairs. - */ - - valueTokenPtr = parsePtr->tokenPtr; - for(i=2; i<=numWords; i+=2) { - varTokenPtr = TokenAfter(valueTokenPtr); - valueTokenPtr = TokenAfter(varTokenPtr); - - localIndex = IndexTailVarIfKnown(interp, varTokenPtr, envPtr); - - if(localIndex < 0) { - return TCL_ERROR; - } - - CompileWord(envPtr, varTokenPtr, interp, 1); - TclEmitInstInt4(INST_VARIABLE, localIndex, envPtr); - - if (i != numWords) { - /* - * A value has been given: set the variable, pop the value - */ - - CompileWord(envPtr, valueTokenPtr, interp, 1); - TclEmitInstInt4(INST_STORE_SCALAR4, localIndex, envPtr); - TclEmitOpcode(INST_POP, envPtr); - } - } - - /* - * Set the result to empty - */ - - PushLiteral(envPtr, "", 0); - return TCL_OK; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileEnsemble -- - * - * Procedure called to compile an ensemble command. Note that most - * ensembles are not compiled, since modifying a compiled ensemble causes - * a invalidation of all existing bytecode (expensive!) which is not - * normally warranted. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the subcommands of the - * ensemble at runtime if a compile-time mapping is possible. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileEnsemble( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *tokenPtr; - Tcl_Obj *mapObj, *subcmdObj, *targetCmdObj, *listObj, **elems; - Tcl_Command ensemble = (Tcl_Command) cmdPtr; - Tcl_Parse synthetic; - int len, numBytes, result, flags = 0, i; - const char *word; - - if (parsePtr->numWords < 2) { - return TCL_ERROR; - } - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - /* - * Too hard. - */ - - return TCL_ERROR; - } - - word = tokenPtr[1].start; - numBytes = tokenPtr[1].size; - - /* - * There's a sporting chance we'll be able to compile this. But now we - * must check properly. To do that, check that we're compiling an ensemble - * that has a compilable command as its appropriate subcommand. - */ - - if (Tcl_GetEnsembleMappingDict(NULL, ensemble, &mapObj) != TCL_OK - || mapObj == NULL) { - /* - * Either not an ensemble or a mapping isn't installed. Crud. Too hard - * to proceed. - */ - - return TCL_ERROR; - } - - /* - * Next, get the flags. We need them on several code paths. - */ - - (void) Tcl_GetEnsembleFlags(NULL, ensemble, &flags); - - /* - * Check to see if there's also a subcommand list; must check to see if - * the subcommand we are calling is in that list if it exists, since that - * list filters the entries in the map. - */ - - (void) Tcl_GetEnsembleSubcommandList(NULL, ensemble, &listObj); - if (listObj != NULL) { - int sclen; - const char *str; - Tcl_Obj *matchObj = NULL; - - if (Tcl_ListObjGetElements(NULL, listObj, &len, &elems) != TCL_OK) { - return TCL_ERROR; - } - for (i=0 ; i<len ; i++) { - str = Tcl_GetStringFromObj(elems[i], &sclen); - if (sclen==numBytes && !memcmp(word, str, (unsigned) numBytes)) { - /* - * Exact match! Excellent! - */ - - result = Tcl_DictObjGet(NULL, mapObj,elems[i], &targetCmdObj); - if (result != TCL_OK || targetCmdObj == NULL) { - return TCL_ERROR; - } - goto doneMapLookup; - } - - /* - * Check to see if we've got a prefix match. A single prefix match - * is fine, and allows us to refine our dictionary lookup, but - * multiple prefix matches is a Bad Thing and will prevent us from - * making progress. Note that we cannot do the lookup immediately - * in the prefix case; might be another entry later in the list - * that causes things to fail. - */ - - if ((flags & TCL_ENSEMBLE_PREFIX) - && strncmp(word, str, (unsigned) numBytes) == 0) { - if (matchObj != NULL) { - return TCL_ERROR; - } - matchObj = elems[i]; - } - } - if (matchObj != NULL) { - result = Tcl_DictObjGet(NULL, mapObj, matchObj, &targetCmdObj); - if (result != TCL_OK || targetCmdObj == NULL) { - return TCL_ERROR; - } - goto doneMapLookup; - } - return TCL_ERROR; - } else { - /* - * No map, so check the dictionary directly. - */ - - TclNewStringObj(subcmdObj, word, numBytes); - result = Tcl_DictObjGet(NULL, mapObj, subcmdObj, &targetCmdObj); - TclDecrRefCount(subcmdObj); - if (result == TCL_OK && targetCmdObj != NULL) { - /* - * Got it. Skip the fiddling around with prefixes. - */ - - goto doneMapLookup; - } - - /* - * We've not literally got a valid subcommand. But maybe we have a - * prefix. Check if prefix matches are allowed. - */ - - if (flags & TCL_ENSEMBLE_PREFIX) { - Tcl_DictSearch s; - int done, matched; - Tcl_Obj *tmpObj; - - /* - * Iterate over the keys in the dictionary, checking to see if - * we're a prefix. - */ - - Tcl_DictObjFirst(NULL,mapObj,&s,&subcmdObj,&tmpObj,&done); - matched = 0; - while (!done) { - if (strncmp(TclGetString(subcmdObj), word, - (unsigned) numBytes) == 0) { - if (matched++) { - /* - * Must have matched twice! Not unique, so no point - * looking further. - */ - - break; - } - targetCmdObj = tmpObj; - } - Tcl_DictObjNext(&s, &subcmdObj, &tmpObj, &done); - } - Tcl_DictObjDone(&s); - - /* - * If we have anything other than a single match, we've failed the - * unique prefix check. - */ - - if (matched != 1) { - return TCL_ERROR; - } - } else { - return TCL_ERROR; - } - } - - /* - * OK, we definitely map to something. But what? - * - * The command we map to is the first word out of the map element. Note - * that we also reject dealing with multi-element rewrites if we are in a - * safe interpreter, as there is otherwise a (highly gnarly!) way to make - * Tcl crash open to exploit. - */ - - doneMapLookup: - if (Tcl_ListObjGetElements(NULL, targetCmdObj, &len, &elems) != TCL_OK) { - return TCL_ERROR; - } - if (len > 1 && Tcl_IsSafe(interp)) { - return TCL_ERROR; - } - targetCmdObj = elems[0]; - - Tcl_IncrRefCount(targetCmdObj); - cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, targetCmdObj); - TclDecrRefCount(targetCmdObj); - if (cmdPtr == NULL || cmdPtr->compileProc == NULL) { - /* - * Maps to an undefined command or a command without a compiler. - * Cannot compile. - */ - - return TCL_ERROR; - } - - /* - * Now we've done the mapping process, can now actually try to compile. - * We do this by handing off to the subcommand's actual compiler. But to - * do that, we have to perform some trickery to rewrite the arguments. - */ - - TclParseInit(interp, NULL, 0, &synthetic); - synthetic.numWords = parsePtr->numWords - 2 + len; - TclGrowParseTokenArray(&synthetic, 2*len); - synthetic.numTokens = 2*len; - - /* - * Now we have the space to work in, install something rewritten. Note - * that we are here praying for all our might that none of these words are - * a script; the error detection code will crash if that happens and there - * is nothing we can do to avoid it! - */ - - for (i=0 ; i<len ; i++) { - int sclen; - const char *str = Tcl_GetStringFromObj(elems[i], &sclen); - - synthetic.tokenPtr[2*i].type = TCL_TOKEN_SIMPLE_WORD; - synthetic.tokenPtr[2*i].start = str; - synthetic.tokenPtr[2*i].size = sclen; - synthetic.tokenPtr[2*i].numComponents = 1; - - synthetic.tokenPtr[2*i+1].type = TCL_TOKEN_TEXT; - synthetic.tokenPtr[2*i+1].start = str; - synthetic.tokenPtr[2*i+1].size = sclen; - synthetic.tokenPtr[2*i+1].numComponents = 0; - } - - /* - * Copy over the real argument tokens. - */ - - for (i=len; i<synthetic.numWords; i++) { - int toCopy; - tokenPtr = TokenAfter(tokenPtr); - toCopy = tokenPtr->numComponents + 1; - TclGrowParseTokenArray(&synthetic, toCopy); - memcpy(synthetic.tokenPtr + synthetic.numTokens, tokenPtr, - sizeof(Tcl_Token) * toCopy); - synthetic.numTokens += toCopy; - } - - /* - * Hand off compilation to the subcommand compiler. At last! - */ - - result = cmdPtr->compileProc(interp, &synthetic, cmdPtr, envPtr); - - /* - * Clean up if necessary. - */ - - Tcl_FreeParse(&synthetic); - return result; -} - -/* - *---------------------------------------------------------------------- - * - * TclCompileInfoExistsCmd -- - * - * Procedure called to compile the "info exists" subcommand. - * - * Results: - * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. - * - * Side effects: - * Instructions are added to envPtr to execute the "info exists" - * subcommand at runtime. - * - *---------------------------------------------------------------------- - */ - -int -TclCompileInfoExistsCmd( - Tcl_Interp *interp, /* Used for error reporting. */ - Tcl_Parse *parsePtr, /* Points to a parse structure for the command - * created by Tcl_ParseCommand. */ - Command *cmdPtr, /* Points to defintion of command being - * compiled. */ - CompileEnv *envPtr) /* Holds resulting instructions. */ -{ - Tcl_Token *tokenPtr; - int isScalar, simpleVarName, localIndex; - DefineLineInformation; /* TIP #280 */ - - if (parsePtr->numWords != 2) { - return TCL_ERROR; - } - - /* - * Decide if we can use a frame slot for the var/array name or if we need - * to emit code to compute and push the name at runtime. We use a frame - * slot (entry in the array of local vars) if we are compiling a procedure - * body and if the name is simple text that does not include namespace - * qualifiers. - */ - - tokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, tokenPtr, envPtr, TCL_CREATE_VAR, &localIndex, - &simpleVarName, &isScalar, 1); - - /* - * Emit instruction to check the variable for existence. - */ - - if (simpleVarName) { - if (isScalar) { - if (localIndex < 0) { - TclEmitOpcode(INST_EXIST_STK, envPtr); - } else { - TclEmitInstInt4(INST_EXIST_SCALAR, localIndex, envPtr); - } - } else { - if (localIndex < 0) { - TclEmitOpcode(INST_EXIST_ARRAY_STK, envPtr); - } else { - TclEmitInstInt4(INST_EXIST_ARRAY, localIndex, envPtr); - } - } - } else { - TclEmitOpcode(INST_EXIST_STK, envPtr); - } - - return TCL_OK; } /* |