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-rw-r--r--generic/tclCompCmds.c3546
1 files changed, 628 insertions, 2918 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c
index f2d1bfb..66c03ab 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;
@@ -3442,31 +3641,32 @@ 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));
+ TclNoErrorStack(interp, Tcl_GetReturnOptions(interp, TCL_ERROR)));
}
/*
*----------------------------------------------------------------------
*
- * 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