diff options
Diffstat (limited to 'generic/tclCompCmds.c')
| -rw-r--r-- | generic/tclCompCmds.c | 3544 |
1 files changed, 627 insertions, 2917 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c index f2d1bfb..083f530 100644 --- a/generic/tclCompCmds.c +++ b/generic/tclCompCmds.c @@ -17,6 +17,31 @@ #include "tclCompile.h" /* + * Prototypes for procedures defined later in this file: + */ + +static ClientData DupDictUpdateInfo(ClientData clientData); +static void FreeDictUpdateInfo(ClientData clientData); +static void PrintDictUpdateInfo(ClientData clientData, + Tcl_Obj *appendObj, ByteCode *codePtr, + unsigned int pcOffset); +static ClientData DupForeachInfo(ClientData clientData); +static void FreeForeachInfo(ClientData clientData); +static void PrintForeachInfo(ClientData clientData, + Tcl_Obj *appendObj, ByteCode *codePtr, + unsigned int pcOffset); +static void CompileReturnInternal(CompileEnv *envPtr, + unsigned char op, int code, int level, + Tcl_Obj *returnOpts); +static int IndexTailVarIfKnown(Tcl_Interp *interp, + Tcl_Token *varTokenPtr, CompileEnv *envPtr); +static int PushVarName(Tcl_Interp *interp, + Tcl_Token *varTokenPtr, CompileEnv *envPtr, + int flags, int *localIndexPtr, + int *simpleVarNamePtr, int *isScalarPtr, + int line, int *clNext); + +/* * Macro that encapsulates an efficiency trick that avoids a function call for * the simplest of compiles. The ANSI C "prototype" for this macro is: * @@ -25,14 +50,14 @@ */ #define CompileWord(envPtr, tokenPtr, interp, word) \ - if ((tokenPtr)->type == TCL_TOKEN_SIMPLE_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]; \ + (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)); \ + (envPtr)); \ } /* @@ -45,165 +70,36 @@ */ #define DefineLineInformation \ - ExtCmdLoc *mapPtr = envPtr->extCmdMapPtr; \ + 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)) - -/* - * Prototypes for procedures defined later in this file: - */ - -static ClientData DupDictUpdateInfo(ClientData clientData); -static void FreeDictUpdateInfo(ClientData clientData); -static void PrintDictUpdateInfo(ClientData clientData, - Tcl_Obj *appendObj, ByteCode *codePtr, - unsigned int pcOffset); -static ClientData DupForeachInfo(ClientData clientData); -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, - 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); + envPtr->line = mapPtr->loc[eclIndex].line[(word)]; \ + envPtr->clNext = mapPtr->loc[eclIndex].next[(word)] #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)]) + 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 */ +#define TCL_NO_LARGE_INDEX 1 /* Do not return localIndex value > 255 */ /* * 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 */ -}; - -AuxDataType tclDictUpdateInfoType = { +const AuxDataType tclDictUpdateInfoType = { "DictUpdateInfo", /* name */ DupDictUpdateInfo, /* dupProc */ FreeDictUpdateInfo, /* freeProc */ @@ -218,8 +114,8 @@ 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 @@ -268,8 +164,8 @@ TclCompileAppendCmd( varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); + PushVarNameWord(interp, varTokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); /* * We are doing an assignment, otherwise TclCompileSetCmd was called, so @@ -319,8 +215,8 @@ 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 @@ -399,7 +295,7 @@ 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; } @@ -423,7 +319,7 @@ TclCompileCatchCmd( return TCL_ERROR; } resultIndex = TclFindCompiledLocal(resultNameTokenPtr[1].start, - resultNameTokenPtr[1].size, /*create*/ 1, envPtr->procPtr); + resultNameTokenPtr[1].size, /*create*/ 1, envPtr); if (resultIndex < 0) { return TCL_ERROR; } @@ -440,7 +336,7 @@ TclCompileCatchCmd( return TCL_ERROR; } optsIndex = TclFindCompiledLocal(optsNameTokenPtr[1].start, - optsNameTokenPtr[1].size, /*create*/ 1, envPtr->procPtr); + optsNameTokenPtr[1].size, /*create*/ 1, envPtr); if (optsIndex < 0) { return TCL_ERROR; } @@ -495,7 +391,7 @@ TclCompileCatchCmd( TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP, &jumpFixup); /* Stack at this point: ?script? <mark> result TCL_OK */ - /* + /* * Emit the "error case" epilogue. Push the interpreter result * and the return code. */ @@ -507,13 +403,13 @@ TclCompileCatchCmd( TclEmitOpcode(INST_PUSH_RETURN_CODE, envPtr); /* - * Update the target of the jump after the "no errors" code. + * Update the target of the jump after the "no errors" code. */ /* Stack at this point: ?script? result returnCode */ if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) { Tcl_Panic("TclCompileCatchCmd: bad jump distance %d", - (int) (CurrentOffset(envPtr) - jumpFixup.codeOffset)); + (int)(CurrentOffset(envPtr) - jumpFixup.codeOffset)); } /* Push the return options if the caller wants them */ @@ -571,7 +467,7 @@ TclCompileCatchCmd( TclEmitOpcode(INST_POP, envPtr); } - /* + /* * Stack is now ?script? result. Get rid of the subst'ed script * if it's hanging arond. */ @@ -581,7 +477,7 @@ TclCompileCatchCmd( TclEmitOpcode(INST_POP, envPtr); } - /* + /* * Result of all this, on either branch, should have been to leave * one operand -- the return code -- on the stack. */ @@ -601,8 +497,8 @@ 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 @@ -644,8 +540,8 @@ 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 @@ -684,7 +580,6 @@ TclCompileDictSetCmd( { Tcl_Token *tokenPtr; int numWords, i; - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *varTokenPtr; int dictVarIndex, nameChars; @@ -694,7 +589,7 @@ TclCompileDictSetCmd( * There must be at least one argument after the command. */ - if (parsePtr->numWords < 4 || procPtr == NULL) { + if (parsePtr->numWords < 4) { return TCL_ERROR; } @@ -713,7 +608,10 @@ TclCompileDictSetCmd( if (!TclIsLocalScalar(name, nameChars)) { return TCL_ERROR; } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); + dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr); + if (dictVarIndex < 0) { + return TCL_ERROR; + } /* * Remaining words (key path and value to set) can be handled normally. @@ -744,7 +642,6 @@ TclCompileDictIncrCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *varTokenPtr, *keyTokenPtr; int dictVarIndex, nameChars, incrAmount; @@ -754,7 +651,7 @@ TclCompileDictIncrCmd( * 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); @@ -802,7 +699,10 @@ TclCompileDictIncrCmd( if (!TclIsLocalScalar(name, nameChars)) { return TCL_ERROR; } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); + dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr); + if (dictVarIndex < 0) { + return TCL_ERROR; + } /* * Emit the key and the code to actually do the increment. @@ -859,7 +759,6 @@ TclCompileDictForCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *varsTokenPtr, *dictTokenPtr, *bodyTokenPtr; int keyVarIndex, valueVarIndex, nameChars, loopRange, catchRange; @@ -875,7 +774,7 @@ TclCompileDictForCmd( * There must be at least three argument after the command. */ - if (parsePtr->numWords != 4 || procPtr == NULL) { + if (parsePtr->numWords != 4) { return TCL_ERROR; } @@ -901,24 +800,28 @@ TclCompileDictForCmd( } Tcl_DStringFree(&buffer); if (numVars != 2) { - ckfree((char *) argv); + ckfree(argv); return TCL_ERROR; } nameChars = strlen(argv[0]); if (!TclIsLocalScalar(argv[0], nameChars)) { - ckfree((char *) argv); + ckfree(argv); return TCL_ERROR; } - keyVarIndex = TclFindCompiledLocal(argv[0], nameChars, 1, procPtr); + keyVarIndex = TclFindCompiledLocal(argv[0], nameChars, 1, envPtr); nameChars = strlen(argv[1]); if (!TclIsLocalScalar(argv[1], nameChars)) { - ckfree((char *) argv); + ckfree(argv); + return TCL_ERROR; + } + valueVarIndex = TclFindCompiledLocal(argv[1], nameChars, 1, envPtr); + ckfree(argv); + + if ((keyVarIndex < 0) || (valueVarIndex < 0)) { return TCL_ERROR; } - valueVarIndex = TclFindCompiledLocal(argv[1], nameChars, 1, procPtr); - ckfree((char *) argv); /* * Allocate a temporary variable to store the iterator reference. The @@ -927,7 +830,10 @@ TclCompileDictForCmd( * (at which point it should also have been finished with). */ - infoIndex = TclFindCompiledLocal(NULL, 0, 1, procPtr); + infoIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr); + if (infoIndex < 0) { + return TCL_ERROR; + } /* * Preparation complete; issue instructions. Note that this code issues @@ -972,7 +878,7 @@ TclCompileDictForCmd( * Compile the loop body itself. It should be stack-neutral. */ - SetLineInformation (4); + SetLineInformation(4); CompileBody(envPtr, bodyTokenPtr, interp); TclEmitOpcode( INST_POP, envPtr); @@ -1005,7 +911,8 @@ TclCompileDictForCmd( */ ExceptionRangeTarget(envPtr, loopRange, breakOffset); - TclEmitInstInt4( INST_DICT_DONE, infoIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); TclEmitOpcode( INST_END_CATCH, envPtr); endTargetOffset = CurrentOffset(envPtr); TclEmitInstInt4( INST_JUMP4, 0, envPtr); @@ -1018,7 +925,8 @@ TclCompileDictForCmd( ExceptionRangeTarget(envPtr, catchRange, catchOffset); TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); TclEmitOpcode( INST_PUSH_RESULT, envPtr); - TclEmitInstInt4( INST_DICT_DONE, infoIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); TclEmitOpcode( INST_END_CATCH, envPtr); TclEmitOpcode( INST_RETURN_STK, envPtr); @@ -1034,7 +942,8 @@ TclCompileDictForCmd( envPtr->codeStart + emptyTargetOffset); TclEmitOpcode( INST_POP, envPtr); TclEmitOpcode( INST_POP, envPtr); - TclEmitInstInt4( INST_DICT_DONE, infoIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); /* * Final stage of the command (normal case) is that we push an empty @@ -1058,11 +967,11 @@ TclCompileDictUpdateCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ const char *name; int i, nameChars, dictIndex, numVars, range, infoIndex; Tcl_Token **keyTokenPtrs, *dictVarTokenPtr, *bodyTokenPtr, *tokenPtr; + int savedStackDepth = envPtr->currStackDepth; DictUpdateInfo *duiPtr; JumpFixup jumpFixup; @@ -1070,7 +979,7 @@ TclCompileDictUpdateCmd( * There must be at least one argument after the command. */ - if (parsePtr->numWords < 5 || procPtr == NULL) { + if (parsePtr->numWords < 5) { return TCL_ERROR; } @@ -1099,7 +1008,10 @@ TclCompileDictUpdateCmd( if (!TclIsLocalScalar(name, nameChars)) { return TCL_ERROR; } - dictIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); + dictIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr); + if (dictIndex < 0) { + return TCL_ERROR; + } /* * Assemble the instruction metadata. This is complex enough that it is @@ -1107,10 +1019,9 @@ 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, + keyTokenPtrs = TclStackAlloc(interp, sizeof(Tcl_Token *) * numVars); tokenPtr = TokenAfter(dictVarTokenPtr); @@ -1127,16 +1038,12 @@ TclCompileDictUpdateCmd( tokenPtr = TokenAfter(tokenPtr); if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - ckfree((char *) duiPtr); - TclStackFree(interp, keyTokenPtrs); - return TCL_ERROR; + goto failedUpdateInfoAssembly; } name = tokenPtr[1].start; nameChars = tokenPtr[1].size; if (!TclIsLocalScalar(name, nameChars)) { - ckfree((char *) duiPtr); - TclStackFree(interp, keyTokenPtrs); - return TCL_ERROR; + goto failedUpdateInfoAssembly; } /* @@ -1144,11 +1051,15 @@ TclCompileDictUpdateCmd( */ duiPtr->varIndices[i] = - TclFindCompiledLocal(name, nameChars, 1, procPtr); + TclFindCompiledLocal(name, nameChars, 1, envPtr); + if (duiPtr->varIndices[i] < 0) { + goto failedUpdateInfoAssembly; + } tokenPtr = TokenAfter(tokenPtr); } if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - ckfree((char *) duiPtr); + failedUpdateInfoAssembly: + ckfree(duiPtr); TclStackFree(interp, keyTokenPtrs); return TCL_ERROR; } @@ -1172,7 +1083,9 @@ TclCompileDictUpdateCmd( TclEmitInstInt4( INST_BEGIN_CATCH4, range, envPtr); ExceptionRangeStarts(envPtr, range); + envPtr->currStackDepth++; CompileBody(envPtr, bodyTokenPtr, interp); + envPtr->currStackDepth = savedStackDepth; ExceptionRangeEnds(envPtr, range); /* @@ -1224,7 +1137,6 @@ TclCompileDictAppendCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *tokenPtr; int i, dictVarIndex; @@ -1235,7 +1147,7 @@ TclCompileDictAppendCmd( * speed quite so much. ;-) */ - if (parsePtr->numWords<4 || parsePtr->numWords>100 || procPtr==NULL) { + if (parsePtr->numWords<4 || parsePtr->numWords>100) { return TCL_ERROR; } @@ -1253,7 +1165,10 @@ TclCompileDictAppendCmd( if (!TclIsLocalScalar(name, nameChars)) { return TCL_ERROR; } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); + dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr); + if (dictVarIndex < 0) { + return TCL_ERROR; + } } /* @@ -1286,7 +1201,6 @@ TclCompileDictLappendCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Proc *procPtr = envPtr->procPtr; DefineLineInformation; /* TIP #280 */ Tcl_Token *varTokenPtr, *keyTokenPtr, *valueTokenPtr; int dictVarIndex, nameChars; @@ -1296,7 +1210,7 @@ TclCompileDictLappendCmd( * There must be three arguments after the command. */ - if (parsePtr->numWords != 4 || procPtr == NULL) { + if (parsePtr->numWords != 4) { return TCL_ERROR; } @@ -1311,7 +1225,10 @@ TclCompileDictLappendCmd( if (!TclIsLocalScalar(name, nameChars)) { return TCL_ERROR; } - dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, procPtr); + dictVarIndex = TclFindCompiledLocal(name, nameChars, 1, envPtr); + if (dictVarIndex < 0) { + return TCL_ERROR; + } CompileWord(envPtr, keyTokenPtr, interp, 3); CompileWord(envPtr, valueTokenPtr, interp, 4); TclEmitInstInt4( INST_DICT_LAPPEND, dictVarIndex, envPtr); @@ -1348,7 +1265,7 @@ DupDictUpdateInfo( dui1Ptr = clientData; len = sizeof(DictUpdateInfo) + sizeof(int) * (dui1Ptr->length - 1); - dui2Ptr = (DictUpdateInfo *) ckalloc(len); + dui2Ptr = ckalloc(len); memcpy(dui2Ptr, dui1Ptr, len); return dui2Ptr; } @@ -1381,13 +1298,58 @@ 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?] + * However, we only deal with the case where there is just a message. + */ + Tcl_Token *messageTokenPtr; + DefineLineInformation; /* TIP #280 */ + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + messageTokenPtr = TokenAfter(parsePtr->tokenPtr); + + PushLiteral(envPtr, "-code error -level 0", 20); + CompileWord(envPtr, messageTokenPtr, interp, 1); + TclEmitOpcode(INST_RETURN_STK, 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 @@ -1431,8 +1393,8 @@ 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 @@ -1498,7 +1460,7 @@ TclCompileForCmd( * Inline compile the initial command. */ - SetLineInformation (1); + SetLineInformation(1); CompileBody(envPtr, startTokenPtr, interp); TclEmitOpcode(INST_POP, envPtr); @@ -1521,7 +1483,7 @@ TclCompileForCmd( */ bodyCodeOffset = ExceptionRangeStarts(envPtr, bodyRange); - SetLineInformation (4); + SetLineInformation(4); CompileBody(envPtr, bodyTokenPtr, interp); ExceptionRangeEnds(envPtr, bodyRange); envPtr->currStackDepth = savedStackDepth + 1; @@ -1533,7 +1495,7 @@ TclCompileForCmd( envPtr->currStackDepth = savedStackDepth; nextCodeOffset = ExceptionRangeStarts(envPtr, nextRange); - SetLineInformation (3); + SetLineInformation(3); CompileBody(envPtr, nextTokenPtr, interp); ExceptionRangeEnds(envPtr, nextRange); envPtr->currStackDepth = savedStackDepth + 1; @@ -1554,7 +1516,7 @@ TclCompileForCmd( testCodeOffset += 3; } - SetLineInformation (2); + SetLineInformation(2); envPtr->currStackDepth = savedStackDepth; TclCompileExprWords(interp, testTokenPtr, 1, envPtr); envPtr->currStackDepth = savedStackDepth + 1; @@ -1597,8 +1559,8 @@ 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 @@ -1675,7 +1637,7 @@ TclCompileForeachCmd( */ 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 **)); @@ -1753,13 +1715,13 @@ TclCompileForeachCmd( firstValueTemp = -1; for (loopIndex = 0; loopIndex < numLists; loopIndex++) { tempVar = TclFindCompiledLocal(NULL, /*nameChars*/ 0, - /*create*/ 1, procPtr); + /*create*/ 1, envPtr); if (loopIndex == 0) { firstValueTemp = tempVar; } } loopCtTemp = TclFindCompiledLocal(NULL, /*nameChars*/ 0, - /*create*/ 1, procPtr); + /*create*/ 1, envPtr); /* * Create and initialize the ForeachInfo and ForeachVarList data @@ -1767,23 +1729,24 @@ TclCompileForeachCmd( * pointing to the ForeachInfo structure. */ - infoPtr = (ForeachInfo *) ckalloc((unsigned) - sizeof(ForeachInfo) + numLists*sizeof(ForeachVarList *)); + infoPtr = ckalloc(sizeof(ForeachInfo) + + numLists * 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 * 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; } @@ -1804,7 +1767,7 @@ TclCompileForeachCmd( i < numWords-1; i++, tokenPtr = TokenAfter(tokenPtr)) { if ((i%2 == 0) && (i > 0)) { - SetLineInformation (i); + SetLineInformation(i); CompileTokens(envPtr, tokenPtr, interp); tempVar = (firstValueTemp + loopIndex); if (tempVar <= 255) { @@ -1836,7 +1799,7 @@ TclCompileForeachCmd( * Inline compile the loop body. */ - SetLineInformation (bodyIndex); + SetLineInformation(bodyIndex); ExceptionRangeStarts(envPtr, range); CompileBody(envPtr, bodyTokenPtr, interp); ExceptionRangeEnds(envPtr, range); @@ -1901,7 +1864,7 @@ TclCompileForeachCmd( done: for (loopIndex = 0; loopIndex < numLists; loopIndex++) { if (varvList[loopIndex] != NULL) { - ckfree((char *) varvList[loopIndex]); + ckfree(varvList[loopIndex]); } } TclStackFree(interp, (void *)varvList); @@ -1940,8 +1903,8 @@ 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; @@ -1949,8 +1912,8 @@ 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]; @@ -1991,9 +1954,9 @@ FreeForeachInfo( for (i = 0; i < numLists; i++) { listPtr = infoPtr->varLists[i]; - ckfree((char *) listPtr); + ckfree(listPtr); } - ckfree((char *) infoPtr); + ckfree(infoPtr); } /* @@ -2056,13 +2019,88 @@ PrintForeachInfo( /* *---------------------------------------------------------------------- * + * 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; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileIfCmd -- * * Procedure called to compile the "if" 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 "if" command at @@ -2081,7 +2119,7 @@ TclCompileIfCmd( CompileEnv *envPtr) /* Holds resulting instructions. */ { JumpFixupArray jumpFalseFixupArray; - /* Used to fix the ifFalse jump after each + /* 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 @@ -2162,6 +2200,7 @@ TclCompileIfCmd( Tcl_Obj *boolObj = Tcl_NewStringObj(testTokenPtr[1].start, testTokenPtr[1].size); + Tcl_IncrRefCount(boolObj); code = Tcl_GetBooleanFromObj(NULL, boolObj, &boolVal); TclDecrRefCount(boolObj); @@ -2175,7 +2214,7 @@ TclCompileIfCmd( compileScripts = 0; } } else { - SetLineInformation (wordIdx); + SetLineInformation(wordIdx); Tcl_ResetResult(interp); TclCompileExprWords(interp, testTokenPtr, 1, envPtr); if (jumpFalseFixupArray.next >= jumpFalseFixupArray.end) { @@ -2217,7 +2256,7 @@ TclCompileIfCmd( */ if (compileScripts) { - SetLineInformation (wordIdx); + SetLineInformation(wordIdx); envPtr->currStackDepth = savedStackDepth; CompileBody(envPtr, tokenPtr, interp); } @@ -2305,7 +2344,7 @@ TclCompileIfCmd( * Compile the else command body. */ - SetLineInformation (wordIdx); + SetLineInformation(wordIdx); CompileBody(envPtr, tokenPtr, interp); } @@ -2378,8 +2417,8 @@ TclCompileIfCmd( * Procedure called to compile the "incr" 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 "incr" command at @@ -2407,8 +2446,8 @@ TclCompileIncrCmd( varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_LARGE_INDEX|TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); + PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_LARGE_INDEX, + &localIndex, &simpleVarName, &isScalar, 1); /* * If an increment is given, push it, but see first if it's a small @@ -2424,6 +2463,7 @@ TclCompileIncrCmd( int numBytes = incrTokenPtr[1].size; int code; Tcl_Obj *intObj = Tcl_NewStringObj(word, numBytes); + Tcl_IncrRefCount(intObj); code = TclGetIntFromObj(NULL, intObj, &immValue); TclDecrRefCount(intObj); @@ -2434,7 +2474,7 @@ TclCompileIncrCmd( PushLiteral(envPtr, word, numBytes); } } else { - SetLineInformation (2); + SetLineInformation(2); CompileTokens(envPtr, incrTokenPtr, interp); } } else { /* No incr amount given so use 1. */ @@ -2491,13 +2531,85 @@ TclCompileIncrCmd( /* *---------------------------------------------------------------------- * + * 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, 0, &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; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileLappendCmd -- * * Procedure called to compile the "lappend" 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 "lappend" command at @@ -2549,8 +2661,8 @@ TclCompileLappendCmd( varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); + PushVarNameWord(interp, varTokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); /* * If we are doing an assignment, push the new value. In the no values @@ -2559,6 +2671,7 @@ TclCompileLappendCmd( if (numWords > 2) { Tcl_Token *valueTokenPtr = TokenAfter(varTokenPtr); + CompileWord(envPtr, valueTokenPtr, interp, 2); } @@ -2604,8 +2717,8 @@ TclCompileLappendCmd( * Procedure called to compile the "lassign" 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 "lassign" command at @@ -2655,8 +2768,8 @@ TclCompileLassignCmd( * Generate the next variable name. */ - PushVarNameWord(interp, tokenPtr, envPtr, TCL_CREATE_VAR, &localIndex, - &simpleVarName, &isScalar, idx+2); + PushVarNameWord(interp, tokenPtr, envPtr, 0, &localIndex, + &simpleVarName, &isScalar, idx+2); /* * Emit instructions to get the idx'th item out of the list value on @@ -2719,8 +2832,8 @@ TclCompileLassignCmd( * Procedure called to compile the "lindex" 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 "lindex" command at @@ -2802,7 +2915,7 @@ TclCompileLindexCmd( if (numWords == 3) { TclEmitOpcode(INST_LIST_INDEX, envPtr); } else { - TclEmitInstInt4(INST_LIST_INDEX_MULTI, numWords-1, envPtr); + TclEmitInstInt4(INST_LIST_INDEX_MULTI, numWords-1, envPtr); } return TCL_OK; @@ -2816,8 +2929,8 @@ TclCompileLindexCmd( * Procedure called to compile the "list" 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 "list" command at @@ -2880,8 +2993,8 @@ TclCompileListCmd( * Procedure called to compile the "llength" 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 "llength" command at @@ -2920,8 +3033,8 @@ TclCompileLlengthCmd( * Procedure called to compile the "lset" 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 "lset" command at @@ -2992,8 +3105,8 @@ TclCompileLsetCmd( */ varTokenPtr = TokenAfter(parsePtr->tokenPtr); - PushVarNameWord(interp, varTokenPtr, envPtr, TCL_CREATE_VAR, - &localIndex, &simpleVarName, &isScalar, 1); + PushVarNameWord(interp, varTokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); /* * Push the "index" args and the new element value. @@ -3094,13 +3207,96 @@ TclCompileLsetCmd( /* *---------------------------------------------------------------------- * + * TclCompileNamespaceCmd -- + * + * Procedure called to compile the "namespace" command; currently, only + * the subcommand "namespace upvar" is compiled to bytecodes, and then + * only inside a procedure(-like) context. + * + * 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 +TclCompileNamespaceUpvarCmd( + 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 even number of args, >=4 + */ + + numWords = parsePtr->numWords; + if ((numWords % 2) || (numWords < 4)) { + return TCL_ERROR; + } + + /* + * Push the namespace + */ + + tokenPtr = TokenAfter(parsePtr->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=3; i<=numWords; i+=2) { + otherTokenPtr = TokenAfter(localTokenPtr); + localTokenPtr = TokenAfter(otherTokenPtr); + + CompileWord(envPtr, otherTokenPtr, interp, 1); + PushVarNameWord(interp, localTokenPtr, envPtr, 0, + &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; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileRegexpCmd -- * * Procedure called to compile the "regexp" 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 "regexp" command at @@ -3121,7 +3317,7 @@ TclCompileRegexpCmd( 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; + const char *str; DefineLineInformation; /* TIP #280 */ /* @@ -3155,7 +3351,7 @@ TclCompileRegexpCmd( return TCL_ERROR; } - str = (char *) varTokenPtr[1].start; + str = varTokenPtr[1].start; len = varTokenPtr[1].size; if ((len == 2) && (str[0] == '-') && (str[1] == '-')) { sawLast++; @@ -3191,8 +3387,9 @@ TclCompileRegexpCmd( if (varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) { Tcl_DString ds; - str = (char *) varTokenPtr[1].start; + str = varTokenPtr[1].start; len = varTokenPtr[1].size; + /* * If it has a '-', it could be an incorrectly formed regexp command. */ @@ -3246,7 +3443,9 @@ TclCompileRegexpCmd( * 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); } @@ -3261,8 +3460,8 @@ TclCompileRegexpCmd( * Procedure called to compile the "return" 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 "return" command at @@ -3317,8 +3516,7 @@ TclCompileReturnCmd( * Allocate some working space. */ - objv = (Tcl_Obj **) TclStackAlloc(interp, - numOptionWords * sizeof(Tcl_Obj *)); + objv = TclStackAlloc(interp, numOptionWords * sizeof(Tcl_Obj *)); /* * Scan through the return options. If any are unknown at compile time, @@ -3385,6 +3583,7 @@ TclCompileReturnCmd( while (index >= 0) { ExceptionRange range = envPtr->exceptArrayPtr[index]; + if ((range.type == CATCH_EXCEPTION_RANGE) && (range.catchOffset == -1)) { enclosingCatch = 1; @@ -3442,6 +3641,7 @@ TclCompileSyntaxError( int numBytes; const char *bytes = TclGetStringFromObj(msg, &numBytes); + TclErrorStackResetIf(interp, bytes, numBytes); TclEmitPush(TclRegisterNewLiteral(envPtr, bytes, numBytes), envPtr); CompileReturnInternal(envPtr, INST_SYNTAX, TCL_ERROR, 0, Tcl_GetReturnOptions(interp, TCL_ERROR)); @@ -3450,23 +3650,23 @@ TclCompileSyntaxError( /* *---------------------------------------------------------------------- * - * TclCompileSetCmd -- + * TclCompileUpvarCmd -- * - * Procedure called to compile the "set" command. + * Procedure called to compile the "upvar" 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 "set" command at + * Instructions are added to envPtr to execute the "upvar" command at * runtime. * *---------------------------------------------------------------------- */ int -TclCompileSetCmd( +TclCompileUpvarCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ @@ -3474,405 +3674,108 @@ TclCompileSetCmd( * compiled. */ CompileEnv *envPtr) /* Holds resulting instructions. */ { - Tcl_Token *varTokenPtr, *valueTokenPtr; - int isAssignment, isScalar, simpleVarName, localIndex, numWords; + 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 != 2) && (numWords != 3)) { + if (numWords < 3) { + Tcl_DecrRefCount(objPtr); 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. + * Push the frame index if it is known at compile time */ - 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. - */ + tokenPtr = TokenAfter(parsePtr->tokenPtr); + if (TclWordKnownAtCompileTime(tokenPtr, objPtr)) { + CallFrame *framePtr; + const Tcl_ObjType *newTypePtr, *typePtr = objPtr->typePtr; - if (isAssignment) { - valueTokenPtr = TokenAfter(varTokenPtr); - CompileWord(envPtr, valueTokenPtr, interp, 2); - } + /* + * Attempt to convert to a level reference. Note that TclObjGetFrame + * only changes the obj type when a conversion was successful. + */ - /* - * Emit instructions to set/get the variable. - */ + TclObjGetFrame(interp, objPtr, &framePtr); + newTypePtr = objPtr->typePtr; + Tcl_DecrRefCount(objPtr); - 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); + if (newTypePtr != typePtr) { + if (numWords%2) { + return TCL_ERROR; } + CompileWord(envPtr, tokenPtr, interp, 1); + otherTokenPtr = TokenAfter(tokenPtr); + i = 4; } 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); + if (!(numWords%2)) { + return TCL_ERROR; } + PushLiteral(envPtr, "1", 1); + otherTokenPtr = tokenPtr; + i = 3; } } else { - TclEmitOpcode((isAssignment? INST_STORE_STK : INST_LOAD_STK), envPtr); - } - - 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; - - /* - * 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) { + Tcl_DecrRefCount(objPtr); return TCL_ERROR; } /* - * Push the two operands onto the stack and then the index operation. + * 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. */ - 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. - */ + for (; i<=numWords; i+=2, otherTokenPtr = TokenAfter(localTokenPtr)) { + localTokenPtr = TokenAfter(otherTokenPtr); - 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. - */ + CompileWord(envPtr, otherTokenPtr, interp, 1); + PushVarNameWord(interp, localTokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); + if ((localIndex < 0) || !isScalar) { 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); + TclEmitInstInt4(INST_UPVAR, localIndex, envPtr); } /* - * Push the matcher. + * Pop the frame index, and set the result to empty */ - 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); - } + TclEmitOpcode(INST_POP, envPtr); + PushLiteral(envPtr, "", 0); return TCL_OK; } /* *---------------------------------------------------------------------- * - * TclCompileSwitchCmd -- + * TclCompileVariableCmd -- * - * Procedure called to compile the "switch" command. + * Procedure called to compile the "variable" 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). + * 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 "switch" command at + * Instructions are added to envPtr to execute the "variable" command at * runtime. * - * FIXME: - * Stack depths are probably not calculated correctly. - * *---------------------------------------------------------------------- */ int -TclCompileSwitchCmd( +TclCompileVariableCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command * created by Tcl_ParseCommand. */ @@ -3880,967 +3783,158 @@ TclCompileSwitchCmd( * 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 i, valueIndex; + Tcl_Token *varTokenPtr, *valueTokenPtr; + int localIndex, numWords, i; 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. - * - * 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; + numWords = parsePtr->numWords; + if (numWords < 2) { + return TCL_ERROR; } /* - * 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). + * Bail out if not compiling a proc body */ - 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! - */ - + if (envPtr->procPtr == NULL) { return TCL_ERROR; } /* - * 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. */ - tokenPtr = TokenAfter(tokenPtr); - numWords--; - - /* - * 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. + * Loop over the (var, value) pairs. */ - if (numWords == 1) { - CONST char *bytes; - int maxLen, numBytes; - 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. */ + valueTokenPtr = parsePtr->tokenPtr; + for (i=2; i<=numWords; i+=2) { + varTokenPtr = TokenAfter(valueTokenPtr); + valueTokenPtr = TokenAfter(varTokenPtr); - if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { - return TCL_ERROR; - } - bytes = tokenPtr[1].start; - numBytes = tokenPtr[1].size; + localIndex = IndexTailVarIfKnown(interp, varTokenPtr, envPtr); - /* Allocate enough space to work in. */ - maxLen = TclMaxListLength(bytes, numBytes, NULL); - if (maxLen < 2) { + if (localIndex < 0) { return TCL_ERROR; } - bodyTokenArray = (Tcl_Token *) ckalloc(sizeof(Tcl_Token) * maxLen); - bodyToken = (Tcl_Token **) ckalloc(sizeof(Tcl_Token *) * maxLen); - bodyLines = (int *) ckalloc(sizeof(int) * maxLen); - bodyNext = (int **) ckalloc(sizeof(int*) * maxLen); - - bline = mapPtr->loc[eclIndex].line[valueIndex+1]; - numWords = 0; - - while (numBytes > 0) { - CONST char *prevBytes = bytes; - int literal; - - if (TCL_OK != TclFindElement(NULL, bytes, numBytes, - &(bodyTokenArray[numWords].start), &bytes, - &(bodyTokenArray[numWords].size), &literal) || !literal) { - abort: - ckfree((char *) bodyToken); - ckfree((char *) bodyTokenArray); - ckfree((char *) bodyLines); - ckfree((char *) bodyNext); - return TCL_ERROR; - } - - bodyTokenArray[numWords].type = TCL_TOKEN_TEXT; - bodyTokenArray[numWords].numComponents = 0; - bodyToken[numWords] = bodyTokenArray + numWords; - - /* - * 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, prevBytes, bodyTokenArray[numWords].start); - TclAdvanceContinuations (&bline, &clNext, - bodyTokenArray[numWords].start - envPtr->source); - bodyLines[numWords] = bline; - bodyNext[numWords] = clNext; - TclAdvanceLines(&bline, bodyTokenArray[numWords].start, bytes); - TclAdvanceContinuations (&bline, &clNext, bytes - envPtr->source); - - numBytes -= (bytes - prevBytes); - numWords++; - } - if (numWords % 2) { - goto abort; - } - } 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) { - 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). - */ - - 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); - } - 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. - */ - - if (mode == Switch_Exact) { - 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); + CompileWord(envPtr, varTokenPtr, interp, 1); + TclEmitInstInt4(INST_VARIABLE, localIndex, envPtr); - for (i=0 ; i<numWords ; i+=2) { + if (i != numWords) { /* - * For each arm, we must first work out what to do with the match - * term. + * A value has been given: set the variable, pop the value */ - 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. - */ - - 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)); - } - Tcl_DStringFree(&buffer); + CompileWord(envPtr, valueTokenPtr, interp, 1); + if (localIndex < 0x100) { + TclEmitInstInt1(INST_STORE_SCALAR1, localIndex, envPtr); } 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); + TclEmitInstInt4(INST_STORE_SCALAR4, localIndex, envPtr); } - - /* - * 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. - */ - - TclEmitInstInt4(INST_JUMP4, 0, envPtr); - } - } - - /* - * 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. - */ - - 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; - } - - /* - * Now do the actual compilation. Note that we do not use CompileBody - * because we may have synthesized the tokens in a non-standard - * pattern. - */ - - 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; + TclEmitOpcode(INST_POP, envPtr); } } /* - * 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). + * Set the result to empty */ - 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; + PushLiteral(envPtr, "", 0); 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 -- + * IndexTailVarIfKnown -- * - * Procedure called to compile the "while" command. + * 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 TCL_OK for a successful compile. Returns TCL_ERROR to defer - * evaluation to runtime. + * Returns the variable's index in the table of compiled locals if the + * tail is known at compile time, or -1 otherwise. * * Side effects: - * Instructions are added to envPtr to execute the "while" command at - * runtime. + * None. * *---------------------------------------------------------------------- */ -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. */ +static int +IndexTailVarIfKnown( + Tcl_Interp *interp, + Tcl_Token *varTokenPtr, /* Token representing the variable name */ 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; - } + Tcl_Obj *tailPtr; + const char *tailName, *p; + int len, n = varTokenPtr->numComponents; + Tcl_Token *lastTokenPtr; + int full, localIndex; /* - * 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" {}". + * 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. * - * Bail out also if the body expression requires substitutions in order to - * insure correct behaviour [Bug 219166] + * 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. */ - testTokenPtr = TokenAfter(parsePtr->tokenPtr); - bodyTokenPtr = TokenAfter(testTokenPtr); - - if ((testTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) - || (bodyTokenPtr->type != TCL_TOKEN_SIMPLE_WORD)) { - return TCL_ERROR; + if (!EnvHasLVT(envPtr)) { + return -1; } - /* - * Find out if the condition is a constant. - */ + 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; + } + } - 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. - */ + tailName = TclGetStringFromObj(tailPtr, &len); - loopMayEnd = 0; - } else { + if (len) { + if (*(tailName+len-1) == ')') { /* - * This is an empty loop: "while 0 {...}" or such. Compile no - * bytecodes. + * Possible array: bail out */ - goto pushResult; + Tcl_DecrRefCount(tailPtr); + return -1; } - } - /* - * 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. */ - } else { /* - * Make sure that the first command in the body is preceded by an - * INST_START_CMD, and hence counted properly. [Bug 1752146] + * Get the tail: immediately after the last '::' */ - 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; + for (p = tailName + len -1; p > tailName; p--) { + if ((*p == ':') && (*(p-1) == ':')) { + p++; + break; + } } - envPtr->currStackDepth = savedStackDepth; - SetLineInformation (1); - TclCompileExprWords(interp, testTokenPtr, 1, envPtr); - envPtr->currStackDepth = savedStackDepth + 1; + if (!full && (p == tailName)) { + /* + * No :: in the last component. + */ - 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); + Tcl_DecrRefCount(tailPtr); + return -1; } + len -= p - tailName; + tailName = p; } - /* - * 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; + localIndex = TclFindCompiledLocal(tailName, len, 1, envPtr); + Tcl_DecrRefCount(tailPtr); + return localIndex; } /* @@ -4852,8 +3946,8 @@ TclCompileWhileCmd( * necessary (append, lappend, set). * * 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 "set" command at @@ -4867,12 +3961,13 @@ PushVarName( 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. */ 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 line, /* Line the token starts on. */ + int *clNext) /* Reference to offset of next hidden cont. + * line. */ { register const char *p; const char *name, *elName; @@ -4933,8 +4028,7 @@ 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; @@ -4947,7 +4041,6 @@ 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. */ @@ -4970,9 +4063,9 @@ PushVarName( */ if (varTokenPtr[n].size == 1) { - --n; + n--; } else { - --varTokenPtr[n].size; + varTokenPtr[n].size--; removedParen = n; } @@ -4980,7 +4073,7 @@ 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) { /* @@ -4988,8 +4081,7 @@ 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; @@ -5020,6 +4112,7 @@ PushVarName( */ int hasNsQualifiers = 0; + for (i = 0, p = name; i < nameChars; i++, p++) { if ((*p == ':') && ((i+1) < nameChars) && (*(p+1) == ':')) { hasNsQualifiers = 1; @@ -5033,10 +4126,9 @@ PushVarName( * push its name and look it up at runtime. */ - if ((envPtr->procPtr != NULL) && !hasNsQualifiers) { + if (!hasNsQualifiers) { localIndex = TclFindCompiledLocal(name, nameChars, - /*create*/ flags & TCL_CREATE_VAR, - envPtr->procPtr); + 1, envPtr); if ((flags & TCL_NO_LARGE_INDEX) && (localIndex > 255)) { /* * We'll push the name. @@ -5057,7 +4149,8 @@ PushVarName( if (elNameChars) { envPtr->line = line; envPtr->clNext = clNext; - TclCompileTokens(interp, elemTokenPtr, elemTokenCount, envPtr); + TclCompileTokens(interp, elemTokenPtr, elemTokenCount, + envPtr); } else { PushLiteral(envPtr, "", 0); } @@ -5073,7 +4166,7 @@ PushVarName( } if (removedParen) { - ++varTokenPtr[removedParen].size; + varTokenPtr[removedParen].size++; } if (allocedTokens) { TclStackFree(interp, elemTokenPtr); @@ -5085,1389 +4178,6 @@ PushVarName( } /* - *---------------------------------------------------------------------- - * - * 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; -} - -/* * Local Variables: * mode: c * c-basic-offset: 4 |