/* * tclCompCmds.c -- * * This file contains compilation procedures that compile various Tcl * commands into a sequence of instructions ("bytecodes"). * * Copyright © 1997-1998 Sun Microsystems, Inc. * Copyright © 2001 Kevin B. Kenny. All rights reserved. * Copyright © 2002 ActiveState Corporation. * Copyright © 2004-2013 Donal K. Fellows. * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. */ #include "tclInt.h" #include "tclCompile.h" #include /* * Prototypes for procedures defined later in this file: */ static AuxDataDupProc DupDictUpdateInfo; static AuxDataFreeProc FreeDictUpdateInfo; static AuxDataPrintProc PrintDictUpdateInfo; static AuxDataPrintProc DisassembleDictUpdateInfo; static AuxDataDupProc DupForeachInfo; static AuxDataFreeProc FreeForeachInfo; static AuxDataPrintProc PrintForeachInfo; static AuxDataPrintProc DisassembleForeachInfo; static AuxDataPrintProc PrintNewForeachInfo; static AuxDataPrintProc DisassembleNewForeachInfo; 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. */ static const AuxDataType foreachInfoType = { "ForeachInfo", /* name */ DupForeachInfo, /* dupProc */ FreeForeachInfo, /* freeProc */ PrintForeachInfo, /* printProc */ DisassembleForeachInfo /* disassembleProc */ }; static const AuxDataType newForeachInfoType = { "NewForeachInfo", /* name */ DupForeachInfo, /* dupProc */ FreeForeachInfo, /* freeProc */ PrintNewForeachInfo, /* printProc */ DisassembleNewForeachInfo /* disassembleProc */ }; static const AuxDataType dictUpdateInfoType = { "DictUpdateInfo", /* name */ DupDictUpdateInfo, /* dupProc */ FreeDictUpdateInfo, /* freeProc */ PrintDictUpdateInfo, /* printProc */ DisassembleDictUpdateInfo /* disassembleProc */ }; /* *---------------------------------------------------------------------- * * TclGetAuxDataType -- * * This procedure looks up an Auxdata type by name. * * Results: * If an AuxData type with name matching "typeName" is found, a pointer * to its AuxDataType structure is returned; otherwise, NULL is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ const AuxDataType * TclGetAuxDataType( const char *typeName) /* Name of AuxData type to look up. */ { if (!strcmp(typeName, foreachInfoType.name)) { return &foreachInfoType; } else if (!strcmp(typeName, newForeachInfoType.name)) { return &newForeachInfoType; } else if (!strcmp(typeName, dictUpdateInfoType.name)) { return &dictUpdateInfoType; } else if (!strcmp(typeName, tclJumptableInfoType.name)) { return &tclJumptableInfoType; } return NULL; } /* *---------------------------------------------------------------------- * * TclCompileAppendCmd -- * * Procedure called to compile the "append" 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 "append" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileAppendCmd( 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 *varTokenPtr, *valueTokenPtr; int isScalar, localIndex, numWords, i; /* TODO: Consider support for compiling expanded args. */ numWords = parsePtr->numWords; if (numWords == 1) { return TCL_ERROR; } else if (numWords == 2) { /* * append varName == set varName */ return TclCompileSetCmd(interp, parsePtr, cmdPtr, envPtr); } else if (numWords > 3) { /* * APPEND instructions currently only handle one value, but we can * handle some multi-value cases by stringing them together. */ goto appendMultiple; } /* * 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, 0, &localIndex, &isScalar, 1); /* * We are doing an assignment, otherwise TclCompileSetCmd was called, so * push the new value. This will need to be extended to push a value for * each argument. */ valueTokenPtr = TokenAfter(varTokenPtr); CompileWord(envPtr, valueTokenPtr, interp, 2); /* * Emit instructions to set/get the variable. */ if (isScalar) { if (localIndex < 0) { TclEmitOpcode(INST_APPEND_STK, envPtr); } else { Emit14Inst(INST_APPEND_SCALAR, localIndex, envPtr); } } else { if (localIndex < 0) { TclEmitOpcode(INST_APPEND_ARRAY_STK, envPtr); } else { 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); localIndex = LocalScalarFromToken(varTokenPtr, envPtr); if (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. */ TCL_UNUSED(Command *), 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_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); TclNewObj(literalObj); isDataLiteral = TclWordKnownAtCompileTime(dataTokenPtr, literalObj); isDataValid = (isDataLiteral && TclListObjLength(NULL, literalObj, &len) == TCL_OK); isDataEven = (isDataValid && (len & 1) == 0); /* * Special case: literal odd-length argument is always an error. */ if (isDataValid && !isDataEven) { /* Abandon custom compile and let invocation raise the error */ code = TclCompileBasic2ArgCmd(interp, parsePtr, cmdPtr, envPtr); goto done; /* * We used to compile to the bytecode that would throw the error, * but that was wrong because it would not invoke the array trace * on the variable. * 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 ((varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) || (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 = TclFindCompiledLocal(varTokenPtr->start, varTokenPtr->size, 1, 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 = (ForeachInfo *)Tcl_Alloc(offsetof(ForeachInfo, varLists) + sizeof(ForeachVarList *)); infoPtr->numLists = 1; infoPtr->varLists[0] = (ForeachVarList *)Tcl_Alloc(offsetof(ForeachVarList, varIndexes) + 2 * sizeof(int)); infoPtr->varLists[0]->numVars = 2; infoPtr->varLists[0]->varIndexes[0] = keyVar; infoPtr->varLists[0]->varIndexes[1] = valVar; infoIndex = TclCreateAuxData(infoPtr, &newForeachInfoType, envPtr); /* * Start issuing instructions to write to the array. */ TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); TclEmitInstInt1(INST_JUMP_TRUE1, 7, envPtr); TclEmitInstInt4(INST_ARRAY_MAKE_IMM, localIndex, envPtr); 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_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; } /* *---------------------------------------------------------------------- * * TclCompileBreakCmd -- * * Procedure called to compile the "break" 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 "break" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileBreakCmd( TCL_UNUSED(Tcl_Interp *), Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { ExceptionRange *rangePtr; ExceptionAux *auxPtr; if (parsePtr->numWords != 1) { return TCL_ERROR; } /* * Find the innermost exception range that contains this command. */ 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; } /* *---------------------------------------------------------------------- * * TclCompileCatchCmd -- * * Procedure called to compile the "catch" 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 "catch" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileCatchCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ JumpFixup jumpFixup; Tcl_Token *cmdTokenPtr, *resultNameTokenPtr, *optsNameTokenPtr; int resultIndex, optsIndex, range, dropScript = 0; 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. */ if ((parsePtr->numWords < 2) || (parsePtr->numWords > 4)) { return TCL_ERROR; } /* * If variables were specified and the catch command is at global level * (not in a procedure), don't compile it inline: the payoff is too small. */ if ((parsePtr->numWords >= 3) && !EnvHasLVT(envPtr)) { return TCL_ERROR; } /* * Make sure the variable names, if any, have no substitutions and just * refer to local scalars. */ resultIndex = optsIndex = -1; cmdTokenPtr = TokenAfter(parsePtr->tokenPtr); if (parsePtr->numWords >= 3) { resultNameTokenPtr = TokenAfter(cmdTokenPtr); /* DGP */ resultIndex = LocalScalarFromToken(resultNameTokenPtr, envPtr); if (resultIndex < 0) { return TCL_ERROR; } /* DKF */ if (parsePtr->numWords == 4) { optsNameTokenPtr = TokenAfter(resultNameTokenPtr); optsIndex = LocalScalarFromToken(optsNameTokenPtr, envPtr); if (optsIndex < 0) { return TCL_ERROR; } } } /* * 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. */ 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 %" TCL_Z_MODIFIER "d", (CurrentOffset(envPtr) - jumpFixup.codeOffset)); } /* * Push the return options if the caller wants them. This needs to happen * before INST_END_CATCH */ if (optsIndex != -1) { TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); } /* * End the catch */ 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); } /* * At this point, the top of the stack is inconveniently ordered: * result returnCode * Reverse the stack to store the result. */ TclEmitInstInt4( INST_REVERSE, 2, envPtr); if (resultIndex != -1) { Emit14Inst( INST_STORE_SCALAR, resultIndex, envPtr); } TclEmitOpcode( INST_POP, envPtr); TclCheckStackDepth(depth+1, envPtr); return TCL_OK; } /*---------------------------------------------------------------------- * * TclCompileClockClicksCmd -- * * Procedure called to compile the "tcl::clock::clicks" command. * * Results: * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer * evaluation to run time. * * Side effects: * Instructions are added to envPtr to execute the "clock clicks" * command at runtime. * *---------------------------------------------------------------------- */ int TclCompileClockClicksCmd( TCL_UNUSED(Tcl_Interp *), Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { Tcl_Token* tokenPtr; switch (parsePtr->numWords) { case 1: /* * No args */ TclEmitInstInt1(INST_CLOCK_READ, 0, envPtr); break; case 2: /* * -milliseconds or -microseconds */ tokenPtr = TokenAfter(parsePtr->tokenPtr); if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size < 4 || tokenPtr[1].size > 13) { return TCL_ERROR; } else if (!strncmp(tokenPtr[1].start, "-microseconds", tokenPtr[1].size)) { TclEmitInstInt1(INST_CLOCK_READ, 1, envPtr); break; } else if (!strncmp(tokenPtr[1].start, "-milliseconds", tokenPtr[1].size)) { TclEmitInstInt1(INST_CLOCK_READ, 2, envPtr); break; } else { return TCL_ERROR; } default: return TCL_ERROR; } return TCL_OK; } /*---------------------------------------------------------------------- * * TclCompileClockReadingCmd -- * * Procedure called to compile the "tcl::clock::microseconds", * "tcl::clock::milliseconds" and "tcl::clock::seconds" commands. * * Results: * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer * evaluation to run time. * * Side effects: * Instructions are added to envPtr to execute the "clock clicks" * command at runtime. * * Client data is 1 for microseconds, 2 for milliseconds, 3 for seconds. *---------------------------------------------------------------------- */ int TclCompileClockReadingCmd( TCL_UNUSED(Tcl_Interp *), 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. */ { if (parsePtr->numWords != 1) { return TCL_ERROR; } TclEmitInstInt1(INST_CLOCK_READ, PTR2INT(cmdPtr->objClientData), 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. */ TCL_UNUSED(Command *), 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. */ TclNewObj(listObj); for (i = 1, tokenPtr = parsePtr->tokenPtr; i < parsePtr->numWords; i++) { tokenPtr = TokenAfter(tokenPtr); TclNewObj(objPtr); 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; size_t slen; TclListObjGetElements(NULL, listObj, &len, &objs); objPtr = Tcl_ConcatObj(len, objs); Tcl_DecrRefCount(listObj); bytes = Tcl_GetStringFromObj(objPtr, &slen); PushLiteral(envPtr, bytes, slen); Tcl_DecrRefCount(objPtr); return TCL_OK; } /* * General case: runtime concat. */ for (i = 1, tokenPtr = parsePtr->tokenPtr; i < parsePtr->numWords; i++) { tokenPtr = TokenAfter(tokenPtr); CompileWord(envPtr, tokenPtr, interp, i); } TclEmitInstInt4( INST_CONCAT_STK, i-1, envPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * TclCompileContinueCmd -- * * Procedure called to compile the "continue" 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 "continue" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileContinueCmd( TCL_UNUSED(Tcl_Interp *), Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { ExceptionRange *rangePtr; ExceptionAux *auxPtr; /* * There should be no argument after the "continue". */ if (parsePtr->numWords != 1) { return TCL_ERROR; } /* * See if we can find a valid continueOffset (i.e., not -1) in the * innermost containing exception range. */ 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; } /* *---------------------------------------------------------------------- * * TclCompileDict*Cmd -- * * Functions called to compile "dict" 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 "dict" subcommand at * runtime. * *---------------------------------------------------------------------- */ int TclCompileDictSetCmd( Tcl_Interp *interp, /* Used for looking up stuff. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; int i, dictVarIndex; Tcl_Token *varTokenPtr; /* * There must be at least one argument after the command. */ if (parsePtr->numWords < 4) { 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. */ varTokenPtr = TokenAfter(parsePtr->tokenPtr); dictVarIndex = LocalScalarFromToken(varTokenPtr, envPtr); if (dictVarIndex < 0) { return TCL_ERROR; } /* * Remaining words (key path and value to set) can be handled normally. */ tokenPtr = TokenAfter(varTokenPtr); for (i=2 ; i< parsePtr->numWords ; i++) { CompileWord(envPtr, tokenPtr, interp, i); tokenPtr = TokenAfter(tokenPtr); } /* * Now emit the instruction to do the dict manipulation. */ TclEmitInstInt4( INST_DICT_SET, parsePtr->numWords-3, envPtr); TclEmitInt4( dictVarIndex, envPtr); TclAdjustStackDepth(-1, envPtr); return TCL_OK; } int TclCompileDictIncrCmd( 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, *keyTokenPtr; int dictVarIndex, incrAmount; /* * There must be at least two arguments after the command. */ if (parsePtr->numWords < 3 || parsePtr->numWords > 4) { return TCL_ERROR; } varTokenPtr = TokenAfter(parsePtr->tokenPtr); keyTokenPtr = TokenAfter(varTokenPtr); /* * Parse the increment amount, if present. */ if (parsePtr->numWords == 4) { const char *word; size_t numBytes; int code; Tcl_Token *incrTokenPtr; Tcl_Obj *intObj; incrTokenPtr = TokenAfter(keyTokenPtr); if (incrTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { return TclCompileBasic2Or3ArgCmd(interp, parsePtr,cmdPtr, envPtr); } word = incrTokenPtr[1].start; numBytes = incrTokenPtr[1].size; intObj = Tcl_NewStringObj(word, numBytes); Tcl_IncrRefCount(intObj); code = TclGetIntFromObj(NULL, intObj, &incrAmount); TclDecrRefCount(intObj); if (code != TCL_OK) { return TclCompileBasic2Or3ArgCmd(interp, parsePtr,cmdPtr, envPtr); } } else { incrAmount = 1; } /* * 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. */ dictVarIndex = LocalScalarFromToken(varTokenPtr, envPtr); if (dictVarIndex < 0) { return TclCompileBasic2Or3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } /* * Emit the key and the code to actually do the increment. */ CompileWord(envPtr, keyTokenPtr, interp, 2); TclEmitInstInt4( INST_DICT_INCR_IMM, incrAmount, envPtr); TclEmitInt4( dictVarIndex, envPtr); return TCL_OK; } int TclCompileDictGetCmd( Tcl_Interp *interp, /* Used for looking up stuff. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; int i; /* * 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); /* * Only compile this because we need INST_DICT_GET anyway. */ for (i=1 ; inumWords ; i++) { CompileWord(envPtr, tokenPtr, interp, i); tokenPtr = TokenAfter(tokenPtr); } TclEmitInstInt4(INST_DICT_GET, parsePtr->numWords-2, envPtr); TclAdjustStackDepth(-1, envPtr); return TCL_OK; } int TclCompileDictGetWithDefaultCmd( Tcl_Interp *interp, /* Used for looking up stuff. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; int i; /* * There must be at least three arguments after the command. */ /* TODO: Consider support for compiling expanded args. */ if (parsePtr->numWords < 4) { return TCL_ERROR; } tokenPtr = TokenAfter(parsePtr->tokenPtr); for (i=1 ; inumWords ; i++) { CompileWord(envPtr, tokenPtr, interp, i); tokenPtr = TokenAfter(tokenPtr); } TclEmitInstInt4(INST_DICT_GET_DEF, parsePtr->numWords-3, envPtr); TclAdjustStackDepth(-2, 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. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; int i; /* * 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 ; inumWords ; 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. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; 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 ; inumWords ; 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; size_t len; if ((parsePtr->numWords & 1) == 0) { return TCL_ERROR; } /* * See if we can build the value at compile time... */ tokenPtr = TokenAfter(parsePtr->tokenPtr); TclNewObj(dictObj); Tcl_IncrRefCount(dictObj); for (i=1 ; inumWords ; i+=2) { TclNewObj(keyObj); Tcl_IncrRefCount(keyObj); if (!TclWordKnownAtCompileTime(tokenPtr, keyObj)) { Tcl_DecrRefCount(keyObj); Tcl_DecrRefCount(dictObj); goto nonConstant; } tokenPtr = TokenAfter(tokenPtr); TclNewObj(valueObj); 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); } PushStringLiteral(envPtr, ""); Emit14Inst( INST_STORE_SCALAR, worker, envPtr); TclEmitOpcode( INST_POP, envPtr); tokenPtr = TokenAfter(parsePtr->tokenPtr); for (i=1 ; inumWords ; 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 ; inumWords ; 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; } int TclCompileDictForCmd( 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_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 collectVar = -1; /* Index of temp var holding the result * dict. */ const char **argv; Tcl_DString buffer; /* * There must be three arguments after the command. */ if (parsePtr->numWords != 4) { return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } varsTokenPtr = TokenAfter(parsePtr->tokenPtr); dictTokenPtr = TokenAfter(varsTokenPtr); bodyTokenPtr = TokenAfter(dictTokenPtr); if (varsTokenPtr->type != TCL_TOKEN_SIMPLE_WORD || bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { 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); } } /* * Check we've got a pair of variables and that they are local variables. * Then extract their indices in the LVT. */ Tcl_DStringInit(&buffer); TclDStringAppendToken(&buffer, &varsTokenPtr[1]); if (Tcl_SplitList(NULL, Tcl_DStringValue(&buffer), &numVars, &argv) != TCL_OK) { Tcl_DStringFree(&buffer); return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } Tcl_DStringFree(&buffer); if (numVars != 2) { Tcl_Free((void *)argv); return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } nameChars = strlen(argv[0]); keyVarIndex = LocalScalar(argv[0], nameChars, envPtr); nameChars = strlen(argv[1]); valueVarIndex = LocalScalar(argv[1], nameChars, envPtr); Tcl_Free((void *)argv); if ((keyVarIndex < 0) || (valueVarIndex < 0)) { return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } /* * Allocate a temporary variable to store the iterator reference. The * variable will contain a Tcl_DictSearch reference which will be * allocated by INST_DICT_FIRST and disposed when the variable is unset * (at which point it should also have been finished with). */ 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, initialize the accumulator dictionary if needed. */ 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 = 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); 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 = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); ExceptionRangeStarts(envPtr, loopRange); /* * Compile the loop body itself. It should be stack-neutral. */ 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. */ ExceptionRangeEnds(envPtr, loopRange); ExceptionRangeEnds(envPtr, catchRange); /* * Continue (or just normally process) by getting the next pair of items * from the dictionary and jumping back to the code to write them into * variables if there is another pair. */ ExceptionRangeTarget(envPtr, loopRange, continueOffset); TclEmitInstInt4( INST_DICT_NEXT, infoIndex, envPtr); jumpDisplacement = bodyTargetOffset - CurrentOffset(envPtr); TclEmitInstInt4( INST_JUMP_FALSE4, jumpDisplacement, envPtr); endTargetOffset = CurrentOffset(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); 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 * need to pop the bogus key/value pair (pushed to keep stack calculations * easy!) Note that we skip the END_CATCH. [Bug 1382528] */ jumpDisplacement = CurrentOffset(envPtr) - emptyTargetOffset; TclUpdateInstInt4AtPc(INST_JUMP_TRUE4, jumpDisplacement, envPtr->codeStart + emptyTargetOffset); 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 (or push the accumulator as the result object). This is done * last to promote peephole optimization when it's dropped immediately. */ 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; } int TclCompileDictUpdateCmd( 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, dictIndex, numVars, range, infoIndex; Tcl_Token **keyTokenPtrs, *dictVarTokenPtr, *bodyTokenPtr, *tokenPtr; DictUpdateInfo *duiPtr; JumpFixup jumpFixup; /* * There must be at least one argument after the command. */ if (parsePtr->numWords < 5) { return TCL_ERROR; } /* * Parse the command. Expect the following: * dict update ? ...? */ if ((parsePtr->numWords - 1) & 1) { return TCL_ERROR; } numVars = (parsePtr->numWords - 3) / 2; /* * 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. */ dictVarTokenPtr = TokenAfter(parsePtr->tokenPtr); dictIndex = LocalScalarFromToken(dictVarTokenPtr, envPtr); if (dictIndex < 0) { goto issueFallback; } /* * Assemble the instruction metadata. This is complex enough that it is * represented as auxData; it holds an ordered list of variable indices * that are to be used. */ duiPtr = (DictUpdateInfo *)Tcl_Alloc(offsetof(DictUpdateInfo, varIndices) + sizeof(int) * numVars); duiPtr->length = numVars; keyTokenPtrs = (Tcl_Token **)TclStackAlloc(interp, sizeof(Tcl_Token *) * numVars); tokenPtr = TokenAfter(dictVarTokenPtr); for (i=0 ; ivarIndices[i] = LocalScalarFromToken(tokenPtr, envPtr); if (duiPtr->varIndices[i] < 0) { goto failedUpdateInfoAssembly; } tokenPtr = TokenAfter(tokenPtr); } if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { goto failedUpdateInfoAssembly; } bodyTokenPtr = tokenPtr; /* * The list of variables to bind is stored in auxiliary data so that it * can't be snagged by literal sharing and forced to shimmer dangerously. */ infoIndex = TclCreateAuxData(duiPtr, &dictUpdateInfoType, envPtr); for (i=0 ; inumWords - 1); ExceptionRangeEnds(envPtr, range); /* * Normal termination code: the stack has the key list below the result of * 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); /* * Jump around the exceptional termination code. */ TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpFixup); /* * Termination code for non-ok returns: stash the result and return * options in the stack, bring up the key list, finish the update code, * and finally return with the catched return data */ 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); 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 %" TCL_Z_MODIFIER "d", CurrentOffset(envPtr) - jumpFixup.codeOffset); } TclStackFree(interp, keyTokenPtrs); return TCL_OK; /* * Clean up after a failure to create the DictUpdateInfo structure. */ failedUpdateInfoAssembly: Tcl_Free(duiPtr); TclStackFree(interp, keyTokenPtrs); issueFallback: return TclCompileBasicMin2ArgCmd(interp, parsePtr, cmdPtr, envPtr); } int TclCompileDictAppendCmd( 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, dictVarIndex; /* * There must be at least two argument after the command. And we impose an * (arbirary) safe limit; anyone exceeding it should stop worrying about * speed quite so much. ;-) */ /* TODO: Consider support for compiling expanded args. */ if (parsePtr->numWords<4 || parsePtr->numWords>100) { return TCL_ERROR; } /* * Get the index of the local variable that we will be working with. */ tokenPtr = TokenAfter(parsePtr->tokenPtr); dictVarIndex = LocalScalarFromToken(tokenPtr, envPtr); if (dictVarIndex < 0) { return TclCompileBasicMin2ArgCmd(interp, parsePtr,cmdPtr, envPtr); } /* * Produce the string to concatenate onto the dictionary entry. */ tokenPtr = TokenAfter(tokenPtr); for (i=2 ; inumWords ; i++) { CompileWord(envPtr, tokenPtr, interp, i); tokenPtr = TokenAfter(tokenPtr); } if (parsePtr->numWords > 4) { TclEmitInstInt1(INST_STR_CONCAT1, parsePtr->numWords-3, envPtr); } /* * Do the concatenation. */ TclEmitInstInt4(INST_DICT_APPEND, dictVarIndex, envPtr); return TCL_OK; } int TclCompileDictLappendCmd( 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, *keyTokenPtr, *valueTokenPtr; int dictVarIndex; /* * There must be three arguments after the command. */ /* 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); dictVarIndex = LocalScalarFromToken(varTokenPtr, envPtr); if (dictVarIndex < 0) { return TclCompileBasic3ArgCmd(interp, parsePtr, cmdPtr, envPtr); } /* * 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; } /* * Parse the command (trivially). Expect the following: * dict with ? ...? */ varTokenPtr = TokenAfter(parsePtr->tokenPtr); tokenPtr = TokenAfter(varTokenPtr); for (i=3 ; inumWords ; 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 ; inumWords-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 ; inumWords-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 ; inumWords-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 %" TCL_Z_MODIFIER "d", CurrentOffset(envPtr) - jumpFixup.codeOffset); } return TCL_OK; } /* *---------------------------------------------------------------------- * * DupDictUpdateInfo, FreeDictUpdateInfo -- * * Functions to duplicate, release and print the aux data created for use * with the INST_DICT_UPDATE_START and INST_DICT_UPDATE_END instructions. * * Results: * DupDictUpdateInfo: a copy of the auxiliary data * FreeDictUpdateInfo: none * PrintDictUpdateInfo: none * DisassembleDictUpdateInfo: none * * Side effects: * DupDictUpdateInfo: allocates memory * FreeDictUpdateInfo: releases memory * PrintDictUpdateInfo: none * DisassembleDictUpdateInfo: none * *---------------------------------------------------------------------- */ static ClientData DupDictUpdateInfo( ClientData clientData) { DictUpdateInfo *dui1Ptr, *dui2Ptr; size_t len; dui1Ptr = (DictUpdateInfo *)clientData; len = offsetof(DictUpdateInfo, varIndices) + sizeof(int) * dui1Ptr->length; dui2Ptr = (DictUpdateInfo *)Tcl_Alloc(len); memcpy(dui2Ptr, dui1Ptr, len); return dui2Ptr; } static void FreeDictUpdateInfo( ClientData clientData) { Tcl_Free(clientData); } static void PrintDictUpdateInfo( ClientData clientData, Tcl_Obj *appendObj, TCL_UNUSED(ByteCode *), TCL_UNUSED(size_t)) { DictUpdateInfo *duiPtr = (DictUpdateInfo *)clientData; size_t i; for (i=0 ; ilength ; i++) { if (i) { Tcl_AppendToObj(appendObj, ", ", -1); } Tcl_AppendPrintfToObj(appendObj, "%%v%u", duiPtr->varIndices[i]); } } static void DisassembleDictUpdateInfo( ClientData clientData, Tcl_Obj *dictObj, TCL_UNUSED(ByteCode *), TCL_UNUSED(size_t)) { DictUpdateInfo *duiPtr = (DictUpdateInfo *)clientData; size_t i; Tcl_Obj *variables; TclNewObj(variables); for (i=0 ; ilength ; i++) { Tcl_ListObjAppendElement(NULL, variables, Tcl_NewWideIntObj(duiPtr->varIndices[i])); } Tcl_DictObjPut(NULL, dictObj, Tcl_NewStringObj("variables", -1), variables); } /* *---------------------------------------------------------------------- * * 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. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; /* * General syntax: [error message ?errorInfo? ?errorCode?] */ 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. * * Side effects: * Instructions are added to envPtr to execute the "expr" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileExprCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { Tcl_Token *firstWordPtr; if (parsePtr->numWords == 1) { return TCL_ERROR; } /* * TIP #280: Use the per-word line information of the current command. */ envPtr->line = envPtr->extCmdMapPtr->loc[ envPtr->extCmdMapPtr->nuloc-1].line[1]; firstWordPtr = TokenAfter(parsePtr->tokenPtr); TclCompileExprWords(interp, firstWordPtr, parsePtr->numWords-1, envPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * TclCompileForCmd -- * * Procedure called to compile the "for" 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 "for" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileForCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *startTokenPtr, *testTokenPtr, *nextTokenPtr, *bodyTokenPtr; JumpFixup jumpEvalCondFixup; int bodyCodeOffset, nextCodeOffset, jumpDist; int bodyRange, nextRange; if (parsePtr->numWords != 5) { return TCL_ERROR; } /* * If the test expression requires substitutions, don't compile the for * command inline. E.g., the expression might cause the loop to never * execute or execute forever, as in "for {} "$x > 5" {incr x} {}". */ startTokenPtr = TokenAfter(parsePtr->tokenPtr); testTokenPtr = TokenAfter(startTokenPtr); if (testTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { return TCL_ERROR; } /* * Bail out also if the body or the next expression require substitutions * in order to insure correct behaviour [Bug 219166] */ nextTokenPtr = TokenAfter(testTokenPtr); bodyTokenPtr = TokenAfter(nextTokenPtr); if ((nextTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) || (bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD)) { return TCL_ERROR; } /* * Inline compile the initial command. */ BODY(startTokenPtr, 1); TclEmitOpcode(INST_POP, envPtr); /* * Jump to the evaluation of the condition. This code uses the "loop * rotation" optimisation (which eliminates one branch from the loop). * "for start cond next body" produces then: * start * goto A * B: body : bodyCodeOffset * next : nextCodeOffset, continueOffset * A: cond -> result : testCodeOffset * if (result) goto B */ TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpEvalCondFixup); /* * Compile the loop body. */ bodyRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); bodyCodeOffset = ExceptionRangeStarts(envPtr, bodyRange); BODY(bodyTokenPtr, 4); ExceptionRangeEnds(envPtr, bodyRange); TclEmitOpcode(INST_POP, envPtr); /* * 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. */ nextRange = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); envPtr->exceptAuxArrayPtr[nextRange].supportsContinue = 0; nextCodeOffset = ExceptionRangeStarts(envPtr, nextRange); BODY(nextTokenPtr, 3); ExceptionRangeEnds(envPtr, nextRange); TclEmitOpcode(INST_POP, envPtr); /* * Compile the test expression then emit the conditional jump that * terminates the for. */ if (TclFixupForwardJumpToHere(envPtr, &jumpEvalCondFixup, 127)) { bodyCodeOffset += 3; nextCodeOffset += 3; } SetLineInformation(2); TclCompileExprWords(interp, testTokenPtr, 1, envPtr); jumpDist = CurrentOffset(envPtr) - bodyCodeOffset; if (jumpDist > 127) { TclEmitInstInt4(INST_JUMP_TRUE4, -jumpDist, envPtr); } else { TclEmitInstInt1(INST_JUMP_TRUE1, -jumpDist, envPtr); } /* * Fix the starting points of the exception ranges (may have moved due to * jump type modification) and set where the exceptions target. */ envPtr->exceptArrayPtr[bodyRange].codeOffset = bodyCodeOffset; envPtr->exceptArrayPtr[bodyRange].continueOffset = nextCodeOffset; envPtr->exceptArrayPtr[nextRange].codeOffset = nextCodeOffset; ExceptionRangeTarget(envPtr, bodyRange, breakOffset); ExceptionRangeTarget(envPtr, nextRange, breakOffset); TclFinalizeLoopExceptionRange(envPtr, bodyRange); TclFinalizeLoopExceptionRange(envPtr, nextRange); /* * The for command's result is an empty string. */ PushStringLiteral(envPtr, ""); return TCL_OK; } /* *---------------------------------------------------------------------- * * TclCompileForeachCmd -- * * Procedure called to compile the "foreach" 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 "foreach" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileForeachCmd( 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_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 the definition of the 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. */ TCL_UNUSED(Command *), CompileEnv *envPtr, /* Holds resulting instructions. */ int collect) /* Select collecting or accumulating mode * (TCL_EACH_*) */ { DefineLineInformation; /* TIP #280 */ Proc *procPtr = envPtr->procPtr; ForeachInfo *infoPtr=NULL; /* Points to the structure describing this * foreach command. Stored in a AuxData * record in the ByteCode. */ Tcl_Token *tokenPtr, *bodyTokenPtr; int jumpBackOffset, infoIndex, range; int numWords, numLists, i, j, code = TCL_OK; Tcl_Obj *varListObj = NULL; /* * If the foreach command isn't in a procedure, don't compile it inline: * the payoff is too small. */ if (procPtr == NULL) { return TCL_ERROR; } numWords = parsePtr->numWords; if ((numWords < 4) || (numWords%2 != 0)) { return TCL_ERROR; } /* * Bail out if the body requires substitutions in order to ensure correct * behaviour. [Bug 219166] */ for (i = 0, tokenPtr = parsePtr->tokenPtr; i < numWords-1; i++) { tokenPtr = TokenAfter(tokenPtr); } bodyTokenPtr = tokenPtr; if (bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { return TCL_ERROR; } /* * Create and initialize the ForeachInfo and ForeachVarList data * structures describing this command. Then create a AuxData record * pointing to the ForeachInfo structure. */ numLists = (numWords - 2)/2; infoPtr = (ForeachInfo *)Tcl_Alloc(offsetof(ForeachInfo, varLists) + numLists * sizeof(ForeachVarList *)); infoPtr->numLists = 0; /* Count this up as we go */ /* * Parse each var list into sequence of var names. Don't * compile the foreach inline if any var name needs substitutions or isn't * a scalar, or if any var list needs substitutions. */ TclNewObj(varListObj); for (i = 0, tokenPtr = parsePtr->tokenPtr; i < numWords-1; i++, tokenPtr = TokenAfter(tokenPtr)) { ForeachVarList *varListPtr; int numVars; if (i%2 != 1) { continue; } /* * If the variable list is empty, we can enter an infinite loop when * the interpreted version would not. Take care to ensure this does * not happen. [Bug 1671138] */ if (!TclWordKnownAtCompileTime(tokenPtr, varListObj) || TCL_OK != TclListObjLength(NULL, varListObj, &numVars) || numVars == 0) { code = TCL_ERROR; goto done; } varListPtr = (ForeachVarList *)Tcl_Alloc(offsetof(ForeachVarList, varIndexes) + numVars * sizeof(int)); varListPtr->numVars = numVars; infoPtr->varLists[i/2] = varListPtr; infoPtr->numLists++; for (j = 0; j < numVars; j++) { Tcl_Obj *varNameObj; const char *bytes; int varIndex; size_t length; Tcl_ListObjIndex(NULL, varListObj, j, &varNameObj); bytes = Tcl_GetStringFromObj(varNameObj, &length); varIndex = LocalScalar(bytes, length, envPtr); if (varIndex < 0) { code = TCL_ERROR; goto done; } varListPtr->varIndexes[j] = varIndex; } Tcl_SetObjLength(varListObj, 0); } /* * We will compile the foreach command. */ infoIndex = TclCreateAuxData(infoPtr, &newForeachInfoType, envPtr); /* * Create the collecting object, unshared. */ if (collect == TCL_EACH_COLLECT) { TclEmitInstInt4(INST_LIST, 0, envPtr); } /* * Evaluate each value list and leave it on stack. */ for (i = 0, tokenPtr = parsePtr->tokenPtr; i < numWords-1; i++, tokenPtr = TokenAfter(tokenPtr)) { if ((i%2 == 0) && (i > 0)) { CompileWord(envPtr, tokenPtr, interp, i); } } TclEmitInstInt4(INST_FOREACH_START, infoIndex, envPtr); /* * Inline compile the loop body. */ range = TclCreateExceptRange(LOOP_EXCEPTION_RANGE, envPtr); ExceptionRangeStarts(envPtr, range); BODY(bodyTokenPtr, numWords - 1); ExceptionRangeEnds(envPtr, range); if (collect == TCL_EACH_COLLECT) { TclEmitOpcode(INST_LMAP_COLLECT, envPtr); } else { TclEmitOpcode( INST_POP, envPtr); } /* * Bottom of loop code: assign each loop variable and check whether * to terminate the loop. Set the loop's break target. */ 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 jumpback distance from INST_FOREACH_STEP to the start of the * body's code. Misuse loopCtTemp for storing the jump size. */ jumpBackOffset = envPtr->exceptArrayPtr[range].continueOffset - envPtr->exceptArrayPtr[range].codeOffset; infoPtr->loopCtTemp = -jumpBackOffset; /* * The command's result is an empty string if not collecting. If * collecting, it is automatically left on stack after FOREACH_END. */ if (collect != TCL_EACH_COLLECT) { PushStringLiteral(envPtr, ""); } done: if (code == TCL_ERROR) { FreeForeachInfo(infoPtr); } Tcl_DecrRefCount(varListObj); return code; } /* *---------------------------------------------------------------------- * * DupForeachInfo -- * * This procedure duplicates a ForeachInfo structure created as auxiliary * data during the compilation of a foreach command. * * Results: * A pointer to a newly allocated copy of the existing ForeachInfo * structure is returned. * * Side effects: * Storage for the copied ForeachInfo record is allocated. If the * original ForeachInfo structure pointed to any ForeachVarList records, * these structures are also copied and pointers to them are stored in * the new ForeachInfo record. * *---------------------------------------------------------------------- */ static ClientData DupForeachInfo( ClientData clientData) /* The foreach command's compilation auxiliary * data to duplicate. */ { ForeachInfo *srcPtr = (ForeachInfo *)clientData; ForeachInfo *dupPtr; ForeachVarList *srcListPtr, *dupListPtr; int numVars, i, j, numLists = srcPtr->numLists; dupPtr = (ForeachInfo *)Tcl_Alloc(offsetof(ForeachInfo, varLists) + numLists * sizeof(ForeachVarList *)); dupPtr->numLists = numLists; dupPtr->firstValueTemp = srcPtr->firstValueTemp; dupPtr->loopCtTemp = srcPtr->loopCtTemp; for (i = 0; i < numLists; i++) { srcListPtr = srcPtr->varLists[i]; numVars = srcListPtr->numVars; dupListPtr = (ForeachVarList *)Tcl_Alloc(offsetof(ForeachVarList, varIndexes) + numVars * sizeof(int)); dupListPtr->numVars = numVars; for (j = 0; j < numVars; j++) { dupListPtr->varIndexes[j] = srcListPtr->varIndexes[j]; } dupPtr->varLists[i] = dupListPtr; } return dupPtr; } /* *---------------------------------------------------------------------- * * FreeForeachInfo -- * * Procedure to free a ForeachInfo structure created as auxiliary data * during the compilation of a foreach command. * * Results: * None. * * Side effects: * Storage for the ForeachInfo structure pointed to by the ClientData * argument is freed as is any ForeachVarList record pointed to by the * ForeachInfo structure. * *---------------------------------------------------------------------- */ static void FreeForeachInfo( ClientData clientData) /* The foreach command's compilation auxiliary * data to free. */ { ForeachInfo *infoPtr = (ForeachInfo *)clientData; ForeachVarList *listPtr; size_t i, numLists = infoPtr->numLists; for (i = 0; i < numLists; i++) { listPtr = infoPtr->varLists[i]; Tcl_Free(listPtr); } Tcl_Free(infoPtr); } /* *---------------------------------------------------------------------- * * PrintForeachInfo, DisassembleForeachInfo -- * * Functions to write a human-readable or script-readablerepresentation * of a ForeachInfo structure to a Tcl_Obj for debugging. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ static void PrintForeachInfo( ClientData clientData, Tcl_Obj *appendObj, TCL_UNUSED(ByteCode *), TCL_UNUSED(size_t)) { ForeachInfo *infoPtr = (ForeachInfo *)clientData; ForeachVarList *varsPtr; size_t i, j; Tcl_AppendToObj(appendObj, "data=[", -1); for (i=0 ; inumLists ; i++) { if (i) { Tcl_AppendToObj(appendObj, ", ", -1); } Tcl_AppendPrintfToObj(appendObj, "%%v%" TCL_Z_MODIFIER "u", (infoPtr->firstValueTemp + i)); } Tcl_AppendPrintfToObj(appendObj, "], loop=%%v%" TCL_Z_MODIFIER "u", infoPtr->loopCtTemp); for (i=0 ; inumLists ; i++) { if (i) { Tcl_AppendToObj(appendObj, ",", -1); } Tcl_AppendPrintfToObj(appendObj, "\n\t\t it%%v%" TCL_Z_MODIFIER "u\t[", (infoPtr->firstValueTemp + i)); varsPtr = infoPtr->varLists[i]; for (j=0 ; jnumVars ; j++) { if (j) { Tcl_AppendToObj(appendObj, ", ", -1); } Tcl_AppendPrintfToObj(appendObj, "%%v%u", (unsigned) varsPtr->varIndexes[j]); } Tcl_AppendToObj(appendObj, "]", -1); } } static void PrintNewForeachInfo( ClientData clientData, Tcl_Obj *appendObj, TCL_UNUSED(ByteCode *), TCL_UNUSED(size_t)) { ForeachInfo *infoPtr = (ForeachInfo *)clientData; ForeachVarList *varsPtr; size_t i, j; Tcl_AppendPrintfToObj(appendObj, "jumpOffset=%+" TCL_Z_MODIFIER "d, vars=", infoPtr->loopCtTemp); for (i=0 ; inumLists ; i++) { if (i) { Tcl_AppendToObj(appendObj, ",", -1); } Tcl_AppendToObj(appendObj, "[", -1); varsPtr = infoPtr->varLists[i]; for (j=0 ; jnumVars ; j++) { if (j) { Tcl_AppendToObj(appendObj, ",", -1); } Tcl_AppendPrintfToObj(appendObj, "%%v%u", (unsigned) varsPtr->varIndexes[j]); } Tcl_AppendToObj(appendObj, "]", -1); } } static void DisassembleForeachInfo( ClientData clientData, Tcl_Obj *dictObj, TCL_UNUSED(ByteCode *), TCL_UNUSED(size_t)) { ForeachInfo *infoPtr = (ForeachInfo *)clientData; ForeachVarList *varsPtr; size_t i, j; Tcl_Obj *objPtr, *innerPtr; /* * Data stores. */ TclNewObj(objPtr); for (i=0 ; inumLists ; i++) { Tcl_ListObjAppendElement(NULL, objPtr, Tcl_NewWideIntObj(infoPtr->firstValueTemp + i)); } Tcl_DictObjPut(NULL, dictObj, Tcl_NewStringObj("data", -1), objPtr); /* * Loop counter. */ Tcl_DictObjPut(NULL, dictObj, Tcl_NewStringObj("loop", -1), Tcl_NewWideIntObj(infoPtr->loopCtTemp)); /* * Assignment targets. */ TclNewObj(objPtr); for (i=0 ; inumLists ; i++) { TclNewObj(innerPtr); varsPtr = infoPtr->varLists[i]; for (j=0 ; jnumVars ; j++) { Tcl_ListObjAppendElement(NULL, innerPtr, Tcl_NewWideIntObj(varsPtr->varIndexes[j])); } Tcl_ListObjAppendElement(NULL, objPtr, innerPtr); } Tcl_DictObjPut(NULL, dictObj, Tcl_NewStringObj("assign", -1), objPtr); } static void DisassembleNewForeachInfo( ClientData clientData, Tcl_Obj *dictObj, TCL_UNUSED(ByteCode *), TCL_UNUSED(size_t)) { ForeachInfo *infoPtr = (ForeachInfo *)clientData; ForeachVarList *varsPtr; size_t i, j; Tcl_Obj *objPtr, *innerPtr; /* * Jump offset. */ Tcl_DictObjPut(NULL, dictObj, Tcl_NewStringObj("jumpOffset", -1), Tcl_NewWideIntObj(infoPtr->loopCtTemp)); /* * Assignment targets. */ TclNewObj(objPtr); for (i=0 ; inumLists ; i++) { TclNewObj(innerPtr); varsPtr = infoPtr->varLists[i]; for (j=0 ; jnumVars ; j++) { Tcl_ListObjAppendElement(NULL, innerPtr, Tcl_NewWideIntObj(varsPtr->varIndexes[j])); } Tcl_ListObjAppendElement(NULL, objPtr, innerPtr); } Tcl_DictObjPut(NULL, dictObj, Tcl_NewStringObj("assign", -1), objPtr); } /* *---------------------------------------------------------------------- * * TclCompileFormatCmd -- * * 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. * * Side effects: * Instructions are added to envPtr to execute the "format" command at * runtime. * *---------------------------------------------------------------------- */ int TclCompileFormatCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ TCL_UNUSED(Command *), CompileEnv *envPtr) /* Holds resulting instructions. */ { DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr = parsePtr->tokenPtr; Tcl_Obj **objv, *formatObj, *tmpObj; const char *bytes, *start; int i, j; size_t len; /* * Don't handle any guaranteed-error cases. */ if (parsePtr->numWords < 2) { return TCL_ERROR; } /* * Check if the argument words are all compile-time-known literals; that's * a case we can handle by compiling to a constant. */ TclNewObj(formatObj); Tcl_IncrRefCount(formatObj); tokenPtr = TokenAfter(tokenPtr); if (!TclWordKnownAtCompileTime(tokenPtr, formatObj)) { Tcl_DecrRefCount(formatObj); return TCL_ERROR; } objv = (Tcl_Obj **)Tcl_Alloc((parsePtr->numWords-2) * sizeof(Tcl_Obj *)); for (i=0 ; i+2 < parsePtr->numWords ; i++) { tokenPtr = TokenAfter(tokenPtr); TclNewObj(objv[i]); Tcl_IncrRefCount(objv[i]); if (!TclWordKnownAtCompileTime(tokenPtr, objv[i])) { goto checkForStringConcatCase; } } /* * Everything is a literal, so the result is constant too (or an error if * the format is broken). Do the format now. */ tmpObj = Tcl_Format(interp, TclGetString(formatObj), parsePtr->numWords-2, objv); for (; --i>=0 ;) { Tcl_DecrRefCount(objv[i]); } Tcl_Free(objv); Tcl_DecrRefCount(formatObj); if (tmpObj == NULL) { TclCompileSyntaxError(interp, envPtr); return TCL_OK; } /* * Not an error, always a constant result, so just push the result as a * literal. Job done. */ bytes = Tcl_GetStringFromObj(tmpObj, &len); PushLiteral(envPtr, bytes, len); Tcl_DecrRefCount(tmpObj); return TCL_OK; checkForStringConcatCase: /* * 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, get the state of the system relatively sensible (cleaning up * after our attempt to spot a literal). */ for (; i>=0 ; i--) { Tcl_DecrRefCount(objv[i]); } Tcl_Free(objv); tokenPtr = TokenAfter(parsePtr->tokenPtr); tokenPtr = TokenAfter(tokenPtr); i = 0; /* * Now scan through and check for non-%s and non-%% substitutions. */ for (bytes = TclGetString(formatObj) ; *bytes ; bytes++) { if (*bytes == '%') { bytes++; if (*bytes == 's') { i++; continue; } else if (*bytes == '%') { continue; } Tcl_DecrRefCount(formatObj); return TCL_ERROR; } } /* * Check if the number of things to concatenate will fit in a byte. */ if (i+2 != parsePtr->numWords || i > 125) { Tcl_DecrRefCount(formatObj); return TCL_ERROR; } /* * 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. */ i = 0; /* The count of things to concat. */ j = 2; /* The index into the argument tokens, for * TIP#280 handling. */ start = TclGetString(formatObj); /* The start of the currently-scanned literal * in the format string. */ TclNewObj(tmpObj); /* 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 { const char *b = Tcl_GetStringFromObj(tmpObj, &len); /* * If there is a non-empty literal from the format string, * push it and reset. */ if (len > 0) { PushLiteral(envPtr, b, len); Tcl_DecrRefCount(tmpObj); TclNewObj(tmpObj); i++; } /* * Push the code to produce the string that would be * substituted with %s, except we'll be concatenating * directly. */ CompileWord(envPtr, tokenPtr, interp, j); tokenPtr = TokenAfter(tokenPtr); j++; i++; } start = bytes + 1; } } /* * Handle the case of a trailing literal. */ 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) { /* * Do the concatenation, which produces the result. */ TclEmitInstInt1(INST_STR_CONCAT1, i, envPtr); } return TCL_OK; } /* *---------------------------------------------------------------------- * * TclLocalScalarFromToken -- * * Get the index into the table of compiled locals that corresponds * to a local scalar variable name. * * Results: * Returns the non-negative integer index value into the table of * compiled locals corresponding to a local scalar variable name. * If the arguments passed in do not identify a local scalar variable * then return -1. * * Side effects: * May add an entery into the table of compiled locals. * *---------------------------------------------------------------------- */ int TclLocalScalarFromToken( Tcl_Token *tokenPtr, CompileEnv *envPtr) { int isScalar, index; TclPushVarName(NULL, tokenPtr, envPtr, TCL_NO_ELEMENT, &index, &isScalar); if (!isScalar) { index = -1; } return index; } int TclLocalScalar( const char *bytes, size_t numBytes, CompileEnv *envPtr) { Tcl_Token token[2] = {{TCL_TOKEN_SIMPLE_WORD, NULL, 0, 1}, {TCL_TOKEN_TEXT, NULL, 0, 0}}; token[1].start = bytes; token[1].size = numBytes; return TclLocalScalarFromToken(token, envPtr); } /* *---------------------------------------------------------------------- * * TclPushVarName -- * * Procedure used in the compiling where pushing a variable name is * necessary (append, lappend, set). * * Results: * 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. * *---------------------------------------------------------------------- */ 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_NO_LARGE_INDEX | TCL_NO_ELEMENT. */ int *localIndexPtr, /* Must not be NULL. */ int *isScalarPtr) /* Must not be NULL. */ { const char *p; const char *last, *name, *elName; size_t n; Tcl_Token *elemTokenPtr = NULL; size_t nameLen, elNameLen; int simpleVarName, localIndex; int elemTokenCount = 0, allocedTokens = 0, removedParen = 0; /* * 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. */ simpleVarName = 0; name = elName = NULL; nameLen = elNameLen = 0; localIndex = -1; if (varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { /* * A simple variable name. Divide it up into "name" and "elName" * strings. If it is not a local variable, look it up at runtime. */ simpleVarName = 1; name = varTokenPtr[1].start; nameLen = varTokenPtr[1].size; if (name[nameLen-1] == ')') { /* * last char is ')' => potential array reference. */ last = &name[nameLen-1]; if (*last == ')') { for (p = name; p < last; p++) { if (*p == '(') { elName = p + 1; elNameLen = last - elName; nameLen = p - name; break; } } } if (!(flags & TCL_NO_ELEMENT) && elNameLen) { /* * An array element, the element name is a simple string: * assemble the corresponding token. */ elemTokenPtr = (Tcl_Token *)TclStackAlloc(interp, sizeof(Tcl_Token)); allocedTokens = 1; elemTokenPtr->type = TCL_TOKEN_TEXT; elemTokenPtr->start = elName; elemTokenPtr->size = elNameLen; elemTokenPtr->numComponents = 0; elemTokenCount = 1; } } } else if (interp && ((n = varTokenPtr->numComponents) > 1) && (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. */ simpleVarName = 0; for (p = varTokenPtr[1].start, last = p + varTokenPtr[1].size; p < last; p++) { if (*p == '(') { simpleVarName = 1; break; } } if (simpleVarName) { size_t remainingLen; /* * Check the last token: if it is just ')', do not count it. * Otherwise, remove the ')' and flag so that it is restored at * the end. */ if (varTokenPtr[n].size == 1) { n--; } else { varTokenPtr[n].size--; removedParen = n; } name = varTokenPtr[1].start; nameLen = p - varTokenPtr[1].start; elName = p + 1; remainingLen = (varTokenPtr[2].start - p) - 1; elNameLen = (varTokenPtr[n].start-p) + varTokenPtr[n].size - 1; if (!(flags & TCL_NO_ELEMENT)) { if (remainingLen) { /* * Make a first token with the extra characters in the first * token. */ elemTokenPtr = (Tcl_Token *)TclStackAlloc(interp, n * sizeof(Tcl_Token)); allocedTokens = 1; elemTokenPtr->type = TCL_TOKEN_TEXT; elemTokenPtr->start = elName; elemTokenPtr->size = remainingLen; elemTokenPtr->numComponents = 0; elemTokenCount = n; /* * Copy the remaining tokens. */ memcpy(elemTokenPtr+1, varTokenPtr+2, (n-1) * sizeof(Tcl_Token)); } else { /* * Use the already available tokens. */ elemTokenPtr = &varTokenPtr[2]; elemTokenCount = n - 1; } } } } if (simpleVarName) { /* * See whether name has any namespace separators (::'s). */ int hasNsQualifiers = 0; for (p = name, last = p + nameLen-1; p < last; p++) { if ((*p == ':') && (*(p+1) == ':')) { hasNsQualifiers = 1; break; } } /* * Look up the var name's index in the array of local vars in the proc * frame. If retrieving the var's value and it doesn't already exist, * push its name and look it up at runtime. */ if (!hasNsQualifiers) { localIndex = TclFindCompiledLocal(name, nameLen, 1, envPtr); if ((flags & TCL_NO_LARGE_INDEX) && (localIndex > 255)) { /* * We'll push the name. */ localIndex = -1; } } if (interp && localIndex < 0) { PushLiteral(envPtr, name, nameLen); } /* * Compile the element script, if any, and only if not inhibited. [Bug * 3600328] */ if (elName != NULL && !(flags & TCL_NO_ELEMENT)) { if (elNameLen) { TclCompileTokens(interp, elemTokenPtr, elemTokenCount, envPtr); } else { PushStringLiteral(envPtr, ""); } } } else if (interp) { /* * The var name isn't simple: compile and push it. */ CompileTokens(envPtr, varTokenPtr, interp); } if (removedParen) { varTokenPtr[removedParen].size++; } if (allocedTokens) { TclStackFree(interp, elemTokenPtr); } *localIndexPtr = localIndex; *isScalarPtr = (elName == NULL); } /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */