diff options
Diffstat (limited to 'generic/tclCompCmds.c')
| -rw-r--r-- | generic/tclCompCmds.c | 1384 |
1 files changed, 1352 insertions, 32 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c index fc60016..160fa3c 100644 --- a/generic/tclCompCmds.c +++ b/generic/tclCompCmds.c @@ -15,6 +15,7 @@ #include "tclInt.h" #include "tclCompile.h" +#include <assert.h> /* * Prototypes for procedures defined later in this file: @@ -225,6 +226,245 @@ TclCompileAppendCmd( /* *---------------------------------------------------------------------- * + * TclCompileArray*Cmd -- + * + * Functions called to compile "array" sucommands. + * + * Results: + * All return TCL_OK for a successful compile, and TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "array" subcommand at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileArrayExistsCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr; + int simpleVarName, isScalar, localIndex; + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + PushVarNameWord(interp, tokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); + if (!isScalar) { + return TCL_ERROR; + } + + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + } else { + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + } + return TCL_OK; +} + +int +TclCompileArraySetCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr; + int simpleVarName, isScalar, localIndex; + int dataVar, iterVar, keyVar, valVar, infoIndex; + int back, fwd, offsetBack, offsetFwd, savedStackDepth; + ForeachInfo *infoPtr; + + if (parsePtr->numWords != 3) { + return TCL_ERROR; + } + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + PushVarNameWord(interp, tokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); + if (!isScalar) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(tokenPtr); + + /* + * Special case: literal empty value argument is just an "ensure array" + * operation. + */ + + if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD && tokenPtr[1].size == 0) { + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 7, envPtr); + TclEmitInstInt4(INST_ARRAY_MAKE_IMM, localIndex, envPtr); + } else { + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 5, envPtr); + savedStackDepth = envPtr->currStackDepth; + TclEmitOpcode( INST_ARRAY_MAKE_STK, envPtr); + TclEmitInstInt1(INST_JUMP1, 3, envPtr); + envPtr->currStackDepth = savedStackDepth; + TclEmitOpcode( INST_POP, envPtr); + } + PushLiteral(envPtr, "", 0); + return TCL_OK; + } + + /* + * Prepare for the internal foreach. + */ + + if (envPtr->procPtr == NULL) { + return TCL_ERROR; + } + dataVar = TclFindCompiledLocal(NULL, 0, 1, envPtr); + iterVar = TclFindCompiledLocal(NULL, 0, 1, envPtr); + keyVar = TclFindCompiledLocal(NULL, 0, 1, envPtr); + valVar = TclFindCompiledLocal(NULL, 0, 1, envPtr); + + infoPtr = ckalloc(sizeof(ForeachInfo) + sizeof(ForeachVarList *)); + infoPtr->numLists = 1; + infoPtr->firstValueTemp = dataVar; + infoPtr->loopCtTemp = iterVar; + infoPtr->varLists[0] = ckalloc(sizeof(ForeachVarList) * 2*sizeof(int)); + infoPtr->varLists[0]->numVars = 2; + infoPtr->varLists[0]->varIndexes[0] = keyVar; + infoPtr->varLists[0]->varIndexes[1] = valVar; + infoIndex = TclCreateAuxData(infoPtr, &tclForeachInfoType, envPtr); + + /* + * Start issuing instructions to write to the array. + */ + + CompileWord(envPtr, tokenPtr, interp, 2); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_LIST_LENGTH, envPtr); + PushLiteral(envPtr, "1", 1); + TclEmitOpcode( INST_BITAND, envPtr); + offsetFwd = CurrentOffset(envPtr); + TclEmitInstInt1( INST_JUMP_FALSE1, 0, envPtr); + savedStackDepth = envPtr->currStackDepth; + PushLiteral(envPtr, "list must have an even number of elements", + strlen("list must have an even number of elements")); + PushLiteral(envPtr, "-errorCode {TCL ARGUMENT FORMAT}", + strlen("-errorCode {TCL ARGUMENT FORMAT}")); + TclEmitInstInt4( INST_RETURN_IMM, 1, envPtr); + TclEmitInt4( 0, envPtr); + envPtr->currStackDepth = savedStackDepth; + fwd = CurrentOffset(envPtr) - offsetFwd; + TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1); + Emit14Inst( INST_STORE_SCALAR, dataVar, envPtr); + TclEmitOpcode( INST_POP, envPtr); + + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 7, envPtr); + TclEmitInstInt4(INST_ARRAY_MAKE_IMM, localIndex, envPtr); + TclEmitInstInt4(INST_FOREACH_START4, infoIndex, envPtr); + offsetBack = CurrentOffset(envPtr); + TclEmitInstInt4(INST_FOREACH_STEP4, infoIndex, envPtr); + offsetFwd = CurrentOffset(envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 0, envPtr); + savedStackDepth = envPtr->currStackDepth; + Emit14Inst( INST_LOAD_SCALAR, keyVar, envPtr); + Emit14Inst( INST_LOAD_SCALAR, valVar, envPtr); + Emit14Inst( INST_STORE_ARRAY, localIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); + back = offsetBack - CurrentOffset(envPtr); + TclEmitInstInt1(INST_JUMP1, back, envPtr); + fwd = CurrentOffset(envPtr) - offsetFwd; + TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1); + envPtr->currStackDepth = savedStackDepth; + } else { + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + TclEmitInstInt1(INST_JUMP_TRUE1, 4, envPtr); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_ARRAY_MAKE_STK, envPtr); + TclEmitInstInt4(INST_FOREACH_START4, infoIndex, envPtr); + offsetBack = CurrentOffset(envPtr); + TclEmitInstInt4(INST_FOREACH_STEP4, infoIndex, envPtr); + offsetFwd = CurrentOffset(envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 0, envPtr); + savedStackDepth = envPtr->currStackDepth; + TclEmitOpcode( INST_DUP, envPtr); + Emit14Inst( INST_LOAD_SCALAR, keyVar, envPtr); + Emit14Inst( INST_LOAD_SCALAR, valVar, envPtr); + TclEmitOpcode( INST_STORE_ARRAY_STK, envPtr); + TclEmitOpcode( INST_POP, envPtr); + back = offsetBack - CurrentOffset(envPtr); + TclEmitInstInt1(INST_JUMP1, back, envPtr); + fwd = CurrentOffset(envPtr) - offsetFwd; + TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1); + envPtr->currStackDepth = savedStackDepth; + TclEmitOpcode( INST_POP, envPtr); + } + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( dataVar, envPtr); + PushLiteral(envPtr, "", 0); + return TCL_OK; +} + +int +TclCompileArrayUnsetCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr); + int simpleVarName, isScalar, localIndex, savedStackDepth; + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + + PushVarNameWord(interp, tokenPtr, envPtr, 0, + &localIndex, &simpleVarName, &isScalar, 1); + if (!isScalar) { + return TCL_ERROR; + } + + if (localIndex >= 0) { + TclEmitInstInt4(INST_ARRAY_EXISTS_IMM, localIndex, envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 8, envPtr); + TclEmitInstInt1(INST_UNSET_SCALAR, 1, envPtr); + TclEmitInt4( localIndex, envPtr); + } else { + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_ARRAY_EXISTS_STK, envPtr); + TclEmitInstInt1(INST_JUMP_FALSE1, 6, envPtr); + savedStackDepth = envPtr->currStackDepth; + TclEmitInstInt1(INST_UNSET_STK, 1, envPtr); + TclEmitInstInt1(INST_JUMP1, 3, envPtr); + envPtr->currStackDepth = savedStackDepth; + TclEmitOpcode( INST_POP, envPtr); + } + PushLiteral(envPtr, "", 0); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileBreakCmd -- * * Procedure called to compile the "break" command. @@ -258,6 +498,7 @@ TclCompileBreakCmd( */ TclEmitOpcode(INST_BREAK, envPtr); + PushLiteral(envPtr, "", 0); /* Evil hack! */ return TCL_OK; } @@ -564,6 +805,7 @@ TclCompileContinueCmd( */ TclEmitOpcode(INST_CONTINUE, envPtr); + PushLiteral(envPtr, "", 0); /* Evil hack! */ return TCL_OK; } @@ -582,26 +824,6 @@ TclCompileContinueCmd( * Instructions are added to envPtr to execute the "dict" subcommand at * runtime. * - * Notes: - * The following commands are in fairly common use and are possibly worth - * bytecoding: - * dict append - * dict create [*] - * dict exists [*] - * dict for - * dict get [*] - * dict incr - * dict keys [*] - * dict lappend - * dict map - * dict set - * dict unset - * - * In practice, those that are pure-value operators (marked with [*]) can - * probably be left alone (except perhaps [dict get] which is very very - * common) and [dict update] should be considered instead (really big - * win!) - * *---------------------------------------------------------------------- */ @@ -666,6 +888,7 @@ TclCompileDictSetCmd( TclEmitInstInt4( INST_DICT_SET, numWords-2, envPtr); TclEmitInt4( dictVarIndex, envPtr); + TclAdjustStackDepth(-1, envPtr); return TCL_OK; } @@ -783,6 +1006,44 @@ TclCompileDictGetCmd( tokenPtr = TokenAfter(tokenPtr); } TclEmitInstInt4(INST_DICT_GET, numWords-1, envPtr); + TclAdjustStackDepth(-1, envPtr); + return TCL_OK; +} + +int +TclCompileDictExistsCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + Tcl_Token *tokenPtr; + int numWords, i; + DefineLineInformation; /* TIP #280 */ + + /* + * There must be at least two arguments after the command (the single-arg + * case is legal, but too special and magic for us to deal with here). + */ + + if (parsePtr->numWords < 3) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(parsePtr->tokenPtr); + numWords = parsePtr->numWords-1; + + /* + * Now we do the code generation. + */ + + for (i=0 ; i<numWords ; i++) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + } + TclEmitInstInt4(INST_DICT_EXISTS, numWords-1, envPtr); + TclAdjustStackDepth(-1, envPtr); return TCL_OK; } @@ -843,7 +1104,212 @@ TclCompileDictUnsetCmd( */ TclEmitInstInt4( INST_DICT_UNSET, parsePtr->numWords-2, envPtr); - TclEmitInt4( dictVarIndex, envPtr); + TclEmitInt4( dictVarIndex, envPtr); + return TCL_OK; +} + +int +TclCompileDictCreateCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + int worker; /* Temp var for building the value in. */ + Tcl_Token *tokenPtr; + Tcl_Obj *keyObj, *valueObj, *dictObj; + const char *bytes; + int i, len; + + if ((parsePtr->numWords & 1) == 0) { + return TCL_ERROR; + } + + /* + * See if we can build the value at compile time... + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + dictObj = Tcl_NewObj(); + Tcl_IncrRefCount(dictObj); + for (i=1 ; i<parsePtr->numWords ; i+=2) { + keyObj = Tcl_NewObj(); + Tcl_IncrRefCount(keyObj); + if (!TclWordKnownAtCompileTime(tokenPtr, keyObj)) { + Tcl_DecrRefCount(keyObj); + Tcl_DecrRefCount(dictObj); + goto nonConstant; + } + tokenPtr = TokenAfter(tokenPtr); + valueObj = Tcl_NewObj(); + Tcl_IncrRefCount(valueObj); + if (!TclWordKnownAtCompileTime(tokenPtr, valueObj)) { + Tcl_DecrRefCount(keyObj); + Tcl_DecrRefCount(valueObj); + Tcl_DecrRefCount(dictObj); + goto nonConstant; + } + tokenPtr = TokenAfter(tokenPtr); + Tcl_DictObjPut(NULL, dictObj, keyObj, valueObj); + Tcl_DecrRefCount(keyObj); + Tcl_DecrRefCount(valueObj); + } + + /* + * We did! Excellent. The "verifyDict" is to do type forcing. + */ + + bytes = Tcl_GetStringFromObj(dictObj, &len); + PushLiteral(envPtr, bytes, len); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_DICT_VERIFY, envPtr); + Tcl_DecrRefCount(dictObj); + return TCL_OK; + + /* + * Otherwise, we've got to issue runtime code to do the building, which we + * do by [dict set]ting into an unnamed local variable. This requires that + * we are in a context with an LVT. + */ + + nonConstant: + worker = TclFindCompiledLocal(NULL, 0, 1, envPtr); + if (worker < 0) { + return TCL_ERROR; + } + + PushLiteral(envPtr, "", 0); + Emit14Inst( INST_STORE_SCALAR, worker, envPtr); + TclEmitOpcode( INST_POP, envPtr); + tokenPtr = TokenAfter(parsePtr->tokenPtr); + for (i=1 ; i<parsePtr->numWords ; i+=2) { + CompileWord(envPtr, tokenPtr, interp, i); + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, i+1); + tokenPtr = TokenAfter(tokenPtr); + TclEmitInstInt4( INST_DICT_SET, 1, envPtr); + TclEmitInt4( worker, envPtr); + TclAdjustStackDepth(-1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + } + Emit14Inst( INST_LOAD_SCALAR, worker, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( worker, envPtr); + return TCL_OK; +} + +int +TclCompileDictMergeCmd( + Tcl_Interp *interp, /* Used for looking up stuff. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr; + int i, workerIndex, infoIndex, outLoop; + + /* + * Deal with some special edge cases. Note that in the case with one + * argument, the only thing to do is to verify the dict-ness. + */ + + if (parsePtr->numWords < 2) { + PushLiteral(envPtr, "", 0); + return TCL_OK; + } else if (parsePtr->numWords == 2) { + tokenPtr = TokenAfter(parsePtr->tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_DICT_VERIFY, envPtr); + return TCL_OK; + } + + /* + * There's real merging work to do. + * + * Allocate some working space. This means we'll only ever compile this + * command when there's an LVT present. + */ + + workerIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr); + if (workerIndex < 0) { + return TCL_ERROR; + } + infoIndex = TclFindCompiledLocal(NULL, 0, 1, envPtr); + + /* + * Get the first dictionary and verify that it is so. + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_DICT_VERIFY, envPtr); + Emit14Inst( INST_STORE_SCALAR, workerIndex, envPtr); + TclEmitOpcode( INST_POP, envPtr); + + /* + * For each of the remaining dictionaries... + */ + + outLoop = DeclareExceptionRange(envPtr, CATCH_EXCEPTION_RANGE); + TclEmitInstInt4( INST_BEGIN_CATCH4, outLoop, envPtr); + ExceptionRangeStarts(envPtr, outLoop); + for (i=2 ; i<parsePtr->numWords ; i++) { + /* + * Get the dictionary, and merge its pairs into the first dict (using + * a small loop). + */ + + tokenPtr = TokenAfter(tokenPtr); + CompileWord(envPtr, tokenPtr, interp, i); + TclEmitInstInt4( INST_DICT_FIRST, infoIndex, envPtr); + TclEmitInstInt1( INST_JUMP_TRUE1, 24, envPtr); + TclEmitInstInt4( INST_REVERSE, 2, envPtr); + TclEmitInstInt4( INST_DICT_SET, 1, envPtr); + TclEmitInt4( workerIndex, envPtr); + TclAdjustStackDepth(-1, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitInstInt4( INST_DICT_NEXT, infoIndex, envPtr); + TclEmitInstInt1( INST_JUMP_FALSE1, -20, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); + } + ExceptionRangeEnds(envPtr, outLoop); + TclEmitOpcode( INST_END_CATCH, envPtr); + + /* + * Clean up any state left over. + */ + + Emit14Inst( INST_LOAD_SCALAR, workerIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( workerIndex, envPtr); + TclEmitInstInt1( INST_JUMP1, 18, envPtr); + + /* + * If an exception happens when starting to iterate over the second (and + * subsequent) dicts. This is strictly not necessary, but it is nice. + */ + + ExceptionRangeTarget(envPtr, outLoop, catchOffset); + TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); + TclEmitOpcode( INST_PUSH_RESULT, envPtr); + TclEmitOpcode( INST_END_CATCH, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( workerIndex, envPtr); + TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); + TclEmitInt4( infoIndex, envPtr); + TclEmitOpcode( INST_RETURN_STK, envPtr); + return TCL_OK; } @@ -1036,6 +1502,7 @@ CompileDictEachCmd( TclEmitInstInt4(INST_OVER, 1, envPtr); TclEmitInstInt4(INST_DICT_SET, 1, envPtr); TclEmitInt4( collectVar, envPtr); + TclAdjustStackDepth(-1, envPtr); TclEmitOpcode( INST_POP, envPtr); } TclEmitOpcode( INST_POP, envPtr); @@ -1070,7 +1537,7 @@ CompileDictEachCmd( ExceptionRangeTarget(envPtr, loopRange, breakOffset); TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); - TclEmitInt4( infoIndex, envPtr); + TclEmitInt4( infoIndex, envPtr); TclEmitOpcode( INST_END_CATCH, envPtr); endTargetOffset = CurrentOffset(envPtr); TclEmitInstInt4( INST_JUMP4, 0, envPtr); @@ -1084,7 +1551,7 @@ CompileDictEachCmd( TclEmitOpcode( INST_PUSH_RETURN_OPTIONS, envPtr); TclEmitOpcode( INST_PUSH_RESULT, envPtr); TclEmitInstInt1( INST_UNSET_SCALAR, 0, envPtr); - TclEmitInt4( infoIndex, envPtr); + TclEmitInt4( infoIndex, envPtr); TclEmitOpcode( INST_END_CATCH, envPtr); if (collect == TCL_EACH_COLLECT) { TclEmitInstInt1(INST_UNSET_SCALAR, 0, envPtr); @@ -1098,7 +1565,7 @@ CompileDictEachCmd( * easy!) Note that we skip the END_CATCH. [Bug 1382528] */ - envPtr->currStackDepth = savedStackDepth+2; + envPtr->currStackDepth = savedStackDepth + 2; jumpDisplacement = CurrentOffset(envPtr) - emptyTargetOffset; TclUpdateInstInt4AtPc(INST_JUMP_TRUE4, jumpDisplacement, envPtr->codeStart + emptyTargetOffset); @@ -1294,6 +1761,7 @@ TclCompileDictUpdateCmd( (int) (CurrentOffset(envPtr) - jumpFixup.codeOffset)); } TclStackFree(interp, keyTokenPtrs); + envPtr->currStackDepth = savedStackDepth + 1; return TCL_OK; } @@ -1542,6 +2010,7 @@ TclCompileDictWithCmd( PushLiteral(envPtr, "", 0); } } + envPtr->currStackDepth = savedStackDepth + 1; return TCL_OK; } @@ -1660,6 +2129,7 @@ TclCompileDictWithCmd( * Prepare for the start of the next command. */ + envPtr->currStackDepth = savedStackDepth + 1; if (TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127)) { Tcl_Panic("TclCompileDictCmd(update): bad jump distance %d", (int) (CurrentOffset(envPtr) - jumpFixup.codeOffset)); @@ -1759,6 +2229,7 @@ TclCompileErrorCmd( * However, we only deal with the case where there is just a message. */ Tcl_Token *messageTokenPtr; + int savedStackDepth = envPtr->currStackDepth; DefineLineInformation; /* TIP #280 */ if (parsePtr->numWords != 2) { @@ -1769,6 +2240,7 @@ TclCompileErrorCmd( PushLiteral(envPtr, "-code error -level 0", 20); CompileWord(envPtr, messageTokenPtr, interp, 1); TclEmitOpcode(INST_RETURN_STK, envPtr); + envPtr->currStackDepth = savedStackDepth + 1; return TCL_OK; } @@ -2512,6 +2984,226 @@ PrintForeachInfo( /* *---------------------------------------------------------------------- * + * TclCompileFormatCmd -- + * + * Procedure called to compile the "format" command. Handles cases that + * can be done as constants or simple string concatenation only. + * + * Results: + * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer + * evaluation to runtime. + * + * Side effects: + * Instructions are added to envPtr to execute the "format" command at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileFormatCmd( + Tcl_Interp *interp, /* Used for error reporting. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the command + * created by Tcl_ParseCommand. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds resulting instructions. */ +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = parsePtr->tokenPtr; + Tcl_Obj **objv, *formatObj, *tmpObj; + char *bytes, *start; + int i, j, len; + + /* + * Don't handle any guaranteed-error cases. + */ + + if (parsePtr->numWords < 2) { + return TCL_ERROR; + } + + /* + * Check if the argument words are all compile-time-known literals; that's + * a case we can handle by compiling to a constant. + */ + + formatObj = Tcl_NewObj(); + Tcl_IncrRefCount(formatObj); + tokenPtr = TokenAfter(tokenPtr); + if (!TclWordKnownAtCompileTime(tokenPtr, formatObj)) { + Tcl_DecrRefCount(formatObj); + return TCL_ERROR; + } + + objv = ckalloc((parsePtr->numWords-2) * sizeof(Tcl_Obj *)); + for (i=0 ; i+2 < parsePtr->numWords ; i++) { + tokenPtr = TokenAfter(tokenPtr); + objv[i] = Tcl_NewObj(); + Tcl_IncrRefCount(objv[i]); + if (!TclWordKnownAtCompileTime(tokenPtr, objv[i])) { + goto checkForStringConcatCase; + } + } + + /* + * Everything is a literal, so the result is constant too (or an error if + * the format is broken). Do the format now. + */ + + tmpObj = Tcl_Format(interp, Tcl_GetString(formatObj), + parsePtr->numWords-2, objv); + for (; --i>=0 ;) { + Tcl_DecrRefCount(objv[i]); + } + ckfree(objv); + Tcl_DecrRefCount(formatObj); + if (tmpObj == NULL) { + return TCL_ERROR; + } + + /* + * Not an error, always a constant result, so just push the result as a + * literal. Job done. + */ + + bytes = Tcl_GetStringFromObj(tmpObj, &len); + PushLiteral(envPtr, bytes, len); + Tcl_DecrRefCount(tmpObj); + return TCL_OK; + + checkForStringConcatCase: + /* + * See if we can generate a sequence of things to concatenate. This + * requires that all the % sequences be %s or %%, as everything else is + * sufficiently complex that we don't bother. + * + * First, get the state of the system relatively sensible (cleaning up + * after our attempt to spot a literal). + */ + + for (; --i>=0 ;) { + Tcl_DecrRefCount(objv[i]); + } + ckfree(objv); + tokenPtr = TokenAfter(parsePtr->tokenPtr); + tokenPtr = TokenAfter(tokenPtr); + i = 0; + + /* + * Now scan through and check for non-%s and non-%% substitutions. + */ + + for (bytes = Tcl_GetString(formatObj) ; *bytes ; bytes++) { + if (*bytes == '%') { + bytes++; + if (*bytes == 's') { + i++; + continue; + } else if (*bytes == '%') { + continue; + } + Tcl_DecrRefCount(formatObj); + return TCL_ERROR; + } + } + + /* + * Check if the number of things to concatenate will fit in a byte. + */ + + if (i+2 != parsePtr->numWords || i > 125) { + Tcl_DecrRefCount(formatObj); + return TCL_ERROR; + } + + /* + * Generate the pushes of the things to concatenate, a sequence of + * literals and compiled tokens (of which at least one is non-literal or + * we'd have the case in the first half of this function) which we will + * concatenate. + */ + + i = 0; /* The count of things to concat. */ + j = 2; /* The index into the argument tokens, for + * TIP#280 handling. */ + start = Tcl_GetString(formatObj); + /* The start of the currently-scanned literal + * in the format string. */ + tmpObj = Tcl_NewObj(); /* The buffer used to accumulate the literal + * being built. */ + for (bytes = start ; *bytes ; bytes++) { + if (*bytes == '%') { + Tcl_AppendToObj(tmpObj, start, bytes - start); + if (*++bytes == '%') { + Tcl_AppendToObj(tmpObj, "%", 1); + } else { + char *b = Tcl_GetStringFromObj(tmpObj, &len); + + /* + * If there is a non-empty literal from the format string, + * push it and reset. + */ + + if (len > 0) { + PushLiteral(envPtr, b, len); + Tcl_DecrRefCount(tmpObj); + tmpObj = Tcl_NewObj(); + i++; + } + + /* + * Push the code to produce the string that would be + * substituted with %s, except we'll be concatenating + * directly. + */ + + CompileWord(envPtr, tokenPtr, interp, j); + tokenPtr = TokenAfter(tokenPtr); + j++; + i++; + } + start = bytes + 1; + } + } + + /* + * Handle the case of a trailing literal. + */ + + Tcl_AppendToObj(tmpObj, start, bytes - start); + bytes = Tcl_GetStringFromObj(tmpObj, &len); + if (len > 0) { + PushLiteral(envPtr, bytes, len); + i++; + } + Tcl_DecrRefCount(tmpObj); + Tcl_DecrRefCount(formatObj); + + if (i > 1) { + /* + * Do the concatenation, which produces the result. + */ + + TclEmitInstInt1(INST_CONCAT1, i, envPtr); + } else { + /* + * EVIL HACK! Force there to be a string representation in the case + * where there's just a "%s" in the format; case covered by the test + * format-20.1 (and it is horrible...) + */ + + TclEmitOpcode(INST_DUP, envPtr); + PushLiteral(envPtr, "", 0); + TclEmitOpcode(INST_STR_EQ, envPtr); + TclEmitOpcode(INST_POP, envPtr); + } + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileGlobalCmd -- * * Procedure called to compile the "global" command. @@ -3022,22 +3714,105 @@ TclCompileIncrCmd( /* *---------------------------------------------------------------------- * - * TclCompileInfoExistsCmd -- + * TclCompileInfo*Cmd -- * - * Procedure called to compile the "info exists" subcommand. + * Procedures called to compile "info" subcommands. * * 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. + * Instructions are added to envPtr to execute the "info" subcommand at + * runtime. * *---------------------------------------------------------------------- */ int +TclCompileInfoCommandsCmd( + 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) +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr; + Tcl_Obj *objPtr; + char *bytes; + + /* + * We require one compile-time known argument for the case we can compile. + */ + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(parsePtr->tokenPtr); + objPtr = Tcl_NewObj(); + Tcl_IncrRefCount(objPtr); + if (!TclWordKnownAtCompileTime(tokenPtr, objPtr)) { + goto notCompilable; + } + bytes = Tcl_GetString(objPtr); + + /* + * We require that the argument start with "::" and not have any of "*\[?" + * in it. (Theoretically, we should look in only the final component, but + * the difference is so slight given current naming practices.) + */ + + if (bytes[0] != ':' || bytes[1] != ':' || !TclMatchIsTrivial(bytes)) { + goto notCompilable; + } + Tcl_DecrRefCount(objPtr); + + /* + * Confirmed as a literal that will not frighten the horses. Compile. Note + * that the result needs to be list-ified. + */ + + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_RESOLVE_COMMAND, envPtr); + TclEmitOpcode( INST_DUP, envPtr); + TclEmitOpcode( INST_STR_LEN, envPtr); + TclEmitInstInt1( INST_JUMP_FALSE1, 7, envPtr); + TclEmitInstInt4( INST_LIST, 1, envPtr); + return TCL_OK; + + notCompilable: + Tcl_DecrRefCount(objPtr); + return TCL_ERROR; +} + +int +TclCompileInfoCoroutineCmd( + 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. */ +{ + /* + * Only compile [info coroutine] without arguments. + */ + + if (parsePtr->numWords != 1) { + return TCL_ERROR; + } + + /* + * Not much to do; we compile to a single instruction... + */ + + TclEmitOpcode( INST_COROUTINE_NAME, envPtr); + return TCL_OK; +} + +int TclCompileInfoExistsCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command @@ -3088,6 +3863,118 @@ TclCompileInfoExistsCmd( return TCL_OK; } + +int +TclCompileInfoLevelCmd( + 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. */ +{ + /* + * Only compile [info level] without arguments or with a single argument. + */ + + if (parsePtr->numWords == 1) { + /* + * Not much to do; we compile to a single instruction... + */ + + TclEmitOpcode( INST_INFO_LEVEL_NUM, envPtr); + } else if (parsePtr->numWords != 2) { + return TCL_ERROR; + } else { + DefineLineInformation; /* TIP #280 */ + + /* + * Compile the argument, then add the instruction to convert it into a + * list of arguments. + */ + + SetLineInformation(1); + CompileTokens(envPtr, TokenAfter(parsePtr->tokenPtr), interp); + TclEmitOpcode( INST_INFO_LEVEL_ARGS, envPtr); + } + return TCL_OK; +} + +int +TclCompileInfoObjectClassCmd( + 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) +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr); + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_TCLOO_CLASS, envPtr); + return TCL_OK; +} + +int +TclCompileInfoObjectIsACmd( + 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) +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr); + + /* + * We only handle [info object isa object <somevalue>]. The first three + * words are compressed to a single token by the ensemble compilation + * engine. + */ + + if (parsePtr->numWords != 3) { + return TCL_ERROR; + } + if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size < 1 + || strncmp(tokenPtr[1].start, "object", tokenPtr[1].size)) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(tokenPtr); + + /* + * Issue the code. + */ + + CompileWord(envPtr, tokenPtr, interp, 2); + TclEmitOpcode( INST_TCLOO_IS_OBJECT, envPtr); + return TCL_OK; +} + +int +TclCompileInfoObjectNamespaceCmd( + 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) +{ + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr); + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitOpcode( INST_TCLOO_NS, envPtr); + return TCL_OK; +} /* *---------------------------------------------------------------------- @@ -3936,11 +4823,11 @@ TclCompileLmapCmd( /* *---------------------------------------------------------------------- * - * TclCompileNamespaceCmd -- + * TclCompileNamespace*Cmd -- * - * 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. + * Procedures called to compile the "namespace" command; currently, only + * the subcommands "namespace current" and "namespace upvar" are compiled + * to bytecodes, and the latter only inside a procedure(-like) context. * * Results: * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer @@ -3954,6 +4841,154 @@ TclCompileLmapCmd( */ int +TclCompileNamespaceCurrentCmd( + 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. */ +{ + /* + * Only compile [namespace current] without arguments. + */ + + if (parsePtr->numWords != 1) { + return TCL_ERROR; + } + + /* + * Not much to do; we compile to a single instruction... + */ + + TclEmitOpcode( INST_NS_CURRENT, envPtr); + return TCL_OK; +} + +int +TclCompileNamespaceCodeCmd( + 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; + DefineLineInformation; /* TIP #280 */ + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(parsePtr->tokenPtr); + + /* + * The specification of [namespace code] is rather shocking, in that it is + * supposed to check if the argument is itself the result of [namespace + * code] and not apply itself in that case. Which is excessively cautious, + * but what the test suite checks for. + */ + + if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || (tokenPtr[1].size > 20 + && strncmp(tokenPtr[1].start, "::namespace inscope ", 20) == 0)) { + /* + * Technically, we could just pass a literal '::namespace inscope ' + * term through, but that's something which really shouldn't be + * occurring as something that the user writes so we'll just punt it. + */ + + return TCL_ERROR; + } + + /* + * Now we can compile using the same strategy as [namespace code]'s normal + * implementation does internally. Note that we can't bind the namespace + * name directly here, because TclOO plays complex games with namespaces; + * the value needs to be determined at runtime for safety. + */ + + PushLiteral(envPtr, "::namespace", 11); + PushLiteral(envPtr, "inscope", 7); + TclEmitOpcode( INST_NS_CURRENT, envPtr); + CompileWord(envPtr, tokenPtr, interp, 1); + TclEmitInstInt4( INST_LIST, 4, envPtr); + return TCL_OK; +} + +int +TclCompileNamespaceQualifiersCmd( + 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 = TokenAfter(parsePtr->tokenPtr); + DefineLineInformation; /* TIP #280 */ + int off; + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + + CompileWord(envPtr, tokenPtr, interp, 1); + PushLiteral(envPtr, "0", 1); + PushLiteral(envPtr, "::", 2); + TclEmitInstInt4( INST_OVER, 2, envPtr); + TclEmitOpcode( INST_STR_FIND_LAST, envPtr); + off = CurrentOffset(envPtr); + PushLiteral(envPtr, "1", 1); + TclEmitOpcode( INST_SUB, envPtr); + TclEmitInstInt4( INST_OVER, 2, envPtr); + TclEmitInstInt4( INST_OVER, 1, envPtr); + TclEmitOpcode( INST_STR_INDEX, envPtr); + PushLiteral(envPtr, ":", 1); + TclEmitOpcode( INST_STR_EQ, envPtr); + off = off - CurrentOffset(envPtr); + TclEmitInstInt1( INST_JUMP_TRUE1, off, envPtr); + TclEmitOpcode( INST_STR_RANGE, envPtr); + return TCL_OK; +} + +int +TclCompileNamespaceTailCmd( + 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 = TokenAfter(parsePtr->tokenPtr); + DefineLineInformation; /* TIP #280 */ + JumpFixup jumpFixup; + + if (parsePtr->numWords != 2) { + return TCL_ERROR; + } + + /* + * Take care; only add 2 to found index if the string was actually found. + */ + + CompileWord(envPtr, tokenPtr, interp, 1); + PushLiteral(envPtr, "::", 2); + TclEmitInstInt4( INST_OVER, 1, envPtr); + TclEmitOpcode( INST_STR_FIND_LAST, envPtr); + TclEmitOpcode( INST_DUP, envPtr); + PushLiteral(envPtr, "0", 1); + TclEmitOpcode( INST_GE, envPtr); + TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFixup); + PushLiteral(envPtr, "2", 1); + TclEmitOpcode( INST_ADD, envPtr); + TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127); + PushLiteral(envPtr, "end", 3); + TclEmitOpcode( INST_STR_RANGE, envPtr); + return TCL_OK; +} + +int TclCompileNamespaceUpvarCmd( Tcl_Interp *interp, /* Used for error reporting. */ Tcl_Parse *parsePtr, /* Points to a parse structure for the command @@ -4015,6 +5050,52 @@ TclCompileNamespaceUpvarCmd( PushLiteral(envPtr, "", 0); return TCL_OK; } + +int +TclCompileNamespaceWhichCmd( + 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, *opt; + int idx; + + if (parsePtr->numWords < 2 || parsePtr->numWords > 3) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(parsePtr->tokenPtr); + idx = 1; + + /* + * If there's an option, check that it's "-command". We don't handle + * "-variable" (currently) and anything else is an error. + */ + + if (parsePtr->numWords == 3) { + if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) { + return TCL_ERROR; + } + opt = tokenPtr + 1; + if (opt->size < 2 || opt->size > 8 + || strncmp(opt->start, "-command", opt->size) != 0) { + return TCL_ERROR; + } + tokenPtr = TokenAfter(tokenPtr); + idx++; + } + + /* + * Issue the bytecode. + */ + + CompileWord(envPtr, tokenPtr, interp, idx); + TclEmitOpcode( INST_RESOLVE_COMMAND, envPtr); + return TCL_OK; +} /* *---------------------------------------------------------------------- @@ -4184,6 +5265,180 @@ TclCompileRegexpCmd( /* *---------------------------------------------------------------------- * + * TclCompileRegsubCmd -- + * + * Procedure called to compile the "regsub" 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 "regsub" command at + * runtime. + * + *---------------------------------------------------------------------- + */ + +int +TclCompileRegsubCmd( + Tcl_Interp *interp, /* Tcl interpreter for error reporting. */ + Tcl_Parse *parsePtr, /* Points to a parse structure for the + * command. */ + Command *cmdPtr, /* Points to defintion of command being + * compiled. */ + CompileEnv *envPtr) /* Holds the resulting instructions. */ +{ + /* + * We only compile the case with [regsub -all] where the pattern is both + * known at compile time and simple (i.e., no RE metacharacters). That is, + * the pattern must be translatable into a glob like "*foo*" with no other + * glob metacharacters inside it; there must be some "foo" in there too. + * The substitution string must also be known at compile time and free of + * metacharacters ("\digit" and "&"). Finally, there must not be a + * variable mentioned in the [regsub] to write the result back to (because + * we can't get the count of substitutions that would be the result in + * that case). The key is that these are the conditions under which a + * [string map] could be used instead, in particular a [string map] of the + * form we can compile to bytecode. + * + * In short, we look for: + * + * regsub -all [--] simpleRE string simpleReplacement + * + * The only optional part is the "--", and no other options are handled. + */ + + DefineLineInformation; /* TIP #280 */ + Tcl_Token *tokenPtr, *stringTokenPtr; + Tcl_Obj *patternObj = NULL, *replacementObj = NULL; + Tcl_DString pattern; + const char *bytes; + int len, exact, result = TCL_ERROR; + + if (parsePtr->numWords < 5 || parsePtr->numWords > 6) { + return TCL_ERROR; + } + + /* + * Parse the "-all", which must be the first argument (other options not + * supported, non-"-all" substitution we can't compile). + */ + + tokenPtr = TokenAfter(parsePtr->tokenPtr); + if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size != 4 + || strncmp(tokenPtr[1].start, "-all", 4)) { + return TCL_ERROR; + } + + /* + * Get the pattern into patternObj, checking for "--" in the process. + */ + + Tcl_DStringInit(&pattern); + tokenPtr = TokenAfter(tokenPtr); + patternObj = Tcl_NewObj(); + if (!TclWordKnownAtCompileTime(tokenPtr, patternObj)) { + goto done; + } + if (Tcl_GetString(patternObj)[0] == '-') { + if (strcmp(Tcl_GetString(patternObj), "--") != 0 + || parsePtr->numWords == 5) { + goto done; + } + tokenPtr = TokenAfter(tokenPtr); + Tcl_DecrRefCount(patternObj); + patternObj = Tcl_NewObj(); + if (!TclWordKnownAtCompileTime(tokenPtr, patternObj)) { + goto done; + } + } else if (parsePtr->numWords == 6) { + goto done; + } + + /* + * Identify the code which produces the string to apply the substitution + * to (stringTokenPtr), and the replacement string (into replacementObj). + */ + + stringTokenPtr = TokenAfter(tokenPtr); + tokenPtr = TokenAfter(stringTokenPtr); + replacementObj = Tcl_NewObj(); + if (!TclWordKnownAtCompileTime(tokenPtr, replacementObj)) { + goto done; + } + + /* + * Next, higher-level checks. Is the RE a very simple glob? Is the + * replacement "simple"? + */ + + bytes = Tcl_GetStringFromObj(patternObj, &len); + if (TclReToGlob(NULL, bytes, len, &pattern, &exact) != TCL_OK || exact) { + goto done; + } + bytes = Tcl_DStringValue(&pattern); + if (*bytes++ != '*') { + goto done; + } + while (1) { + switch (*bytes) { + case '*': + if (bytes[1] == '\0') { + /* + * OK, we've proved there are no metacharacters except for the + * '*' at each end. + */ + + len = Tcl_DStringLength(&pattern) - 2; + if (len > 0) { + goto isSimpleGlob; + } + + /* + * The pattern is "**"! I believe that should be impossible, + * but we definitely can't handle that at all. + */ + } + case '\0': case '?': case '[': case '\\': + goto done; + } + bytes++; + } + isSimpleGlob: + for (bytes = Tcl_GetString(replacementObj); *bytes; bytes++) { + switch (*bytes) { + case '\\': case '&': + goto done; + } + } + + /* + * Proved the simplicity constraints! Time to issue the code. + */ + + result = TCL_OK; + bytes = Tcl_DStringValue(&pattern) + 1; + PushLiteral(envPtr, bytes, len); + bytes = Tcl_GetStringFromObj(replacementObj, &len); + PushLiteral(envPtr, bytes, len); + CompileWord(envPtr, stringTokenPtr, interp, parsePtr->numWords-2); + TclEmitOpcode( INST_STR_MAP, envPtr); + + done: + Tcl_DStringFree(&pattern); + if (patternObj) { + Tcl_DecrRefCount(patternObj); + } + if (replacementObj) { + Tcl_DecrRefCount(replacementObj); + } + return result; +} + +/* + *---------------------------------------------------------------------- + * * TclCompileReturnCmd -- * * Procedure called to compile the "return" command. @@ -4216,6 +5471,7 @@ TclCompileReturnCmd( int numWords = parsePtr->numWords; int explicitResult = (0 == (numWords % 2)); int numOptionWords = numWords - 1 - explicitResult; + int savedStackDepth = envPtr->currStackDepth; Tcl_Obj *returnOpts, **objv; Tcl_Token *wordTokenPtr = TokenAfter(parsePtr->tokenPtr); DefineLineInformation; /* TIP #280 */ @@ -4238,6 +5494,7 @@ TclCompileReturnCmd( CompileWord(envPtr, optsTokenPtr, interp, 2); CompileWord(envPtr, msgTokenPtr, interp, 3); TclEmitOpcode(INST_RETURN_STK, envPtr); + envPtr->currStackDepth = savedStackDepth + 1; return TCL_OK; } @@ -4662,6 +5919,69 @@ IndexTailVarIfKnown( return localIndex; } +int +TclCompileObjectSelfCmd( + 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. */ +{ + /* + * We only handle [self] and [self object] (which is the same operation). + * These are the only very common operations on [self] for which + * bytecoding is at all reasonable. + */ + + if (parsePtr->numWords == 1) { + goto compileSelfObject; + } else if (parsePtr->numWords == 2) { + Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr), *subcmd; + + if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size==0) { + return TCL_ERROR; + } + + subcmd = tokenPtr + 1; + if (strncmp(subcmd->start, "object", subcmd->size) == 0) { + goto compileSelfObject; + } else if (strncmp(subcmd->start, "namespace", subcmd->size) == 0) { + goto compileSelfNamespace; + } + } + + /* + * Can't compile; handle with runtime call. + */ + + return TCL_ERROR; + + compileSelfObject: + + /* + * This delegates the entire problem to a single opcode. + */ + + TclEmitOpcode( INST_TCLOO_SELF, envPtr); + return TCL_OK; + + compileSelfNamespace: + + /* + * This is formally only correct with TclOO methods as they are currently + * implemented; it assumes that the current namespace is invariably when a + * TclOO context is present is the object's namespace, and that's + * technically only something that's a matter of current policy. But it + * avoids creating another opcode, so that's all good! + */ + + TclEmitOpcode( INST_TCLOO_SELF, envPtr); + TclEmitOpcode( INST_POP, envPtr); + TclEmitOpcode( INST_NS_CURRENT, envPtr); + return TCL_OK; +} + /* *---------------------------------------------------------------------- * |