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authordkf <donal.k.fellows@manchester.ac.uk>2013-05-18 13:25:11 (GMT)
committerdkf <donal.k.fellows@manchester.ac.uk>2013-05-18 13:25:11 (GMT)
commit4e4b54aad334a0c55a28cbc05206ded0cebb9dca (patch)
treeddae8200d73c198df2495d1a1b9542396c48d6d8 /generic
parenteb0b1becf70d4c82d3ebf9dc6abd28f0f5e3b4d6 (diff)
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Split tclCompCmds.c into two roughly-equal-sized pieces.
Diffstat (limited to 'generic')
-rw-r--r--generic/tclCompCmds.c2963
-rw-r--r--generic/tclCompCmdsGR.c3244
2 files changed, 3276 insertions, 2931 deletions
diff --git a/generic/tclCompCmds.c b/generic/tclCompCmds.c
index a5678bf..2ac0fe3 100644
--- a/generic/tclCompCmds.c
+++ b/generic/tclCompCmds.c
@@ -7,7 +7,7 @@
* Copyright (c) 1997-1998 Sun Microsystems, Inc.
* Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
* Copyright (c) 2002 ActiveState Corporation.
- * Copyright (c) 2004-2006 by Donal K. Fellows.
+ * Copyright (c) 2004-2013 by Donal K. Fellows.
*
* See the file "license.terms" for information on usage and redistribution of
* this file, and for a DISCLAIMER OF ALL WARRANTIES.
@@ -31,11 +31,6 @@ 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,
@@ -2588,6 +2583,37 @@ TclCompileForeachCmd(
/*
*----------------------------------------------------------------------
*
+ * TclCompileLmapCmd --
+ *
+ * Procedure called to compile the "lmap" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "lmap" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLmapCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ return CompileEachloopCmd(interp, parsePtr, cmdPtr, envPtr,
+ TCL_EACH_COLLECT);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
* CompileEachloopCmd --
*
* Procedure called to compile the "foreach" and "lmap" commands.
@@ -3303,2931 +3329,6 @@ TclCompileFormatCmd(
/*
*----------------------------------------------------------------------
*
- * 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.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "if" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileIfCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- JumpFixupArray jumpFalseFixupArray;
- /* Used to fix the ifFalse jump after each
- * test when its target PC is determined. */
- JumpFixupArray jumpEndFixupArray;
- /* Used to fix the jump after each "then" body
- * to the end of the "if" when that PC is
- * determined. */
- Tcl_Token *tokenPtr, *testTokenPtr;
- int jumpIndex = 0; /* Avoid compiler warning. */
- int jumpFalseDist, numWords, wordIdx, numBytes, j, code;
- const char *word;
- int savedStackDepth = envPtr->currStackDepth;
- /* Saved stack depth at the start of the first
- * test; the envPtr current depth is restored
- * to this value at the start of each test. */
- int realCond = 1; /* Set to 0 for static conditions:
- * "if 0 {..}" */
- int boolVal; /* Value of static condition. */
- int compileScripts = 1;
- DefineLineInformation; /* TIP #280 */
-
- /*
- * Only compile the "if" command if all arguments are simple words, in
- * order to insure correct substitution [Bug 219166]
- */
-
- tokenPtr = parsePtr->tokenPtr;
- wordIdx = 0;
- numWords = parsePtr->numWords;
-
- for (wordIdx = 0; wordIdx < numWords; wordIdx++) {
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- return TCL_ERROR;
- }
- tokenPtr = TokenAfter(tokenPtr);
- }
-
- TclInitJumpFixupArray(&jumpFalseFixupArray);
- TclInitJumpFixupArray(&jumpEndFixupArray);
- code = TCL_OK;
-
- /*
- * Each iteration of this loop compiles one "if expr ?then? body" or
- * "elseif expr ?then? body" clause.
- */
-
- tokenPtr = parsePtr->tokenPtr;
- wordIdx = 0;
- while (wordIdx < numWords) {
- /*
- * Stop looping if the token isn't "if" or "elseif".
- */
-
- word = tokenPtr[1].start;
- numBytes = tokenPtr[1].size;
- if ((tokenPtr == parsePtr->tokenPtr)
- || ((numBytes == 6) && (strncmp(word, "elseif", 6) == 0))) {
- tokenPtr = TokenAfter(tokenPtr);
- wordIdx++;
- } else {
- break;
- }
- if (wordIdx >= numWords) {
- code = TCL_ERROR;
- goto done;
- }
-
- /*
- * Compile the test expression then emit the conditional jump around
- * the "then" part.
- */
-
- envPtr->currStackDepth = savedStackDepth;
- testTokenPtr = tokenPtr;
-
- if (realCond) {
- /*
- * Find out if the condition is a constant.
- */
-
- Tcl_Obj *boolObj = Tcl_NewStringObj(testTokenPtr[1].start,
- testTokenPtr[1].size);
-
- Tcl_IncrRefCount(boolObj);
- code = Tcl_GetBooleanFromObj(NULL, boolObj, &boolVal);
- TclDecrRefCount(boolObj);
- if (code == TCL_OK) {
- /*
- * A static condition.
- */
-
- realCond = 0;
- if (!boolVal) {
- compileScripts = 0;
- }
- } else {
- SetLineInformation(wordIdx);
- Tcl_ResetResult(interp);
- TclCompileExprWords(interp, testTokenPtr, 1, envPtr);
- if (jumpFalseFixupArray.next >= jumpFalseFixupArray.end) {
- TclExpandJumpFixupArray(&jumpFalseFixupArray);
- }
- jumpIndex = jumpFalseFixupArray.next;
- jumpFalseFixupArray.next++;
- TclEmitForwardJump(envPtr, TCL_FALSE_JUMP,
- jumpFalseFixupArray.fixup+jumpIndex);
- }
- code = TCL_OK;
- }
-
- /*
- * Skip over the optional "then" before the then clause.
- */
-
- tokenPtr = TokenAfter(testTokenPtr);
- wordIdx++;
- if (wordIdx >= numWords) {
- code = TCL_ERROR;
- goto done;
- }
- if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
- word = tokenPtr[1].start;
- numBytes = tokenPtr[1].size;
- if ((numBytes == 4) && (strncmp(word, "then", 4) == 0)) {
- tokenPtr = TokenAfter(tokenPtr);
- wordIdx++;
- if (wordIdx >= numWords) {
- code = TCL_ERROR;
- goto done;
- }
- }
- }
-
- /*
- * Compile the "then" command body.
- */
-
- if (compileScripts) {
- SetLineInformation(wordIdx);
- envPtr->currStackDepth = savedStackDepth;
- CompileBody(envPtr, tokenPtr, interp);
- }
-
- if (realCond) {
- /*
- * Jump to the end of the "if" command. Both jumpFalseFixupArray
- * and jumpEndFixupArray are indexed by "jumpIndex".
- */
-
- if (jumpEndFixupArray.next >= jumpEndFixupArray.end) {
- TclExpandJumpFixupArray(&jumpEndFixupArray);
- }
- jumpEndFixupArray.next++;
- TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP,
- jumpEndFixupArray.fixup+jumpIndex);
-
- /*
- * Fix the target of the jumpFalse after the test. Generate a 4
- * byte jump if the distance is > 120 bytes. This is conservative,
- * and ensures that we won't have to replace this jump if we later
- * also need to replace the proceeding jump to the end of the "if"
- * with a 4 byte jump.
- */
-
- if (TclFixupForwardJumpToHere(envPtr,
- jumpFalseFixupArray.fixup+jumpIndex, 120)) {
- /*
- * Adjust the code offset for the proceeding jump to the end
- * of the "if" command.
- */
-
- jumpEndFixupArray.fixup[jumpIndex].codeOffset += 3;
- }
- } else if (boolVal) {
- /*
- * We were processing an "if 1 {...}"; stop compiling scripts.
- */
-
- compileScripts = 0;
- } else {
- /*
- * We were processing an "if 0 {...}"; reset so that the rest
- * (elseif, else) is compiled correctly.
- */
-
- realCond = 1;
- compileScripts = 1;
- }
-
- tokenPtr = TokenAfter(tokenPtr);
- wordIdx++;
- }
-
- /*
- * Restore the current stack depth in the environment; the "else" clause
- * (or its default) will add 1 to this.
- */
-
- envPtr->currStackDepth = savedStackDepth;
-
- /*
- * Check for the optional else clause. Do not compile anything if this was
- * an "if 1 {...}" case.
- */
-
- if ((wordIdx < numWords) && (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD)) {
- /*
- * There is an else clause. Skip over the optional "else" word.
- */
-
- word = tokenPtr[1].start;
- numBytes = tokenPtr[1].size;
- if ((numBytes == 4) && (strncmp(word, "else", 4) == 0)) {
- tokenPtr = TokenAfter(tokenPtr);
- wordIdx++;
- if (wordIdx >= numWords) {
- code = TCL_ERROR;
- goto done;
- }
- }
-
- if (compileScripts) {
- /*
- * Compile the else command body.
- */
-
- SetLineInformation(wordIdx);
- CompileBody(envPtr, tokenPtr, interp);
- }
-
- /*
- * Make sure there are no words after the else clause.
- */
-
- wordIdx++;
- if (wordIdx < numWords) {
- code = TCL_ERROR;
- goto done;
- }
- } else {
- /*
- * No else clause: the "if" command's result is an empty string.
- */
-
- if (compileScripts) {
- PushLiteral(envPtr, "", 0);
- }
- }
-
- /*
- * Fix the unconditional jumps to the end of the "if" command.
- */
-
- for (j = jumpEndFixupArray.next; j > 0; j--) {
- jumpIndex = (j - 1); /* i.e. process the closest jump first. */
- if (TclFixupForwardJumpToHere(envPtr,
- jumpEndFixupArray.fixup+jumpIndex, 127)) {
- /*
- * Adjust the immediately preceeding "ifFalse" jump. We moved it's
- * target (just after this jump) down three bytes.
- */
-
- unsigned char *ifFalsePc = envPtr->codeStart
- + jumpFalseFixupArray.fixup[jumpIndex].codeOffset;
- unsigned char opCode = *ifFalsePc;
-
- if (opCode == INST_JUMP_FALSE1) {
- jumpFalseDist = TclGetInt1AtPtr(ifFalsePc + 1);
- jumpFalseDist += 3;
- TclStoreInt1AtPtr(jumpFalseDist, (ifFalsePc + 1));
- } else if (opCode == INST_JUMP_FALSE4) {
- jumpFalseDist = TclGetInt4AtPtr(ifFalsePc + 1);
- jumpFalseDist += 3;
- TclStoreInt4AtPtr(jumpFalseDist, (ifFalsePc + 1));
- } else {
- Tcl_Panic("TclCompileIfCmd: unexpected opcode \"%d\" updating ifFalse jump", (int) opCode);
- }
- }
- }
-
- /*
- * Free the jumpFixupArray array if malloc'ed storage was used.
- */
-
- done:
- envPtr->currStackDepth = savedStackDepth + 1;
- TclFreeJumpFixupArray(&jumpFalseFixupArray);
- TclFreeJumpFixupArray(&jumpEndFixupArray);
- return code;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileIncrCmd --
- *
- * Procedure called to compile the "incr" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "incr" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileIncrCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *varTokenPtr, *incrTokenPtr;
- int simpleVarName, isScalar, localIndex, haveImmValue, immValue;
- DefineLineInformation; /* TIP #280 */
-
- if ((parsePtr->numWords != 2) && (parsePtr->numWords != 3)) {
- return TCL_ERROR;
- }
-
- varTokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_LARGE_INDEX,
- &localIndex, &simpleVarName, &isScalar, 1);
-
- /*
- * If an increment is given, push it, but see first if it's a small
- * integer.
- */
-
- haveImmValue = 0;
- immValue = 1;
- if (parsePtr->numWords == 3) {
- incrTokenPtr = TokenAfter(varTokenPtr);
- if (incrTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
- const char *word = incrTokenPtr[1].start;
- int numBytes = incrTokenPtr[1].size;
- int code;
- Tcl_Obj *intObj = Tcl_NewStringObj(word, numBytes);
-
- Tcl_IncrRefCount(intObj);
- code = TclGetIntFromObj(NULL, intObj, &immValue);
- TclDecrRefCount(intObj);
- if ((code == TCL_OK) && (-127 <= immValue) && (immValue <= 127)) {
- haveImmValue = 1;
- }
- if (!haveImmValue) {
- PushLiteral(envPtr, word, numBytes);
- }
- } else {
- SetLineInformation(2);
- CompileTokens(envPtr, incrTokenPtr, interp);
- }
- } else { /* No incr amount given so use 1. */
- haveImmValue = 1;
- }
-
- /*
- * Emit the instruction to increment the variable.
- */
-
- if (!simpleVarName) {
- if (haveImmValue) {
- TclEmitInstInt1( INST_INCR_STK_IMM, immValue, envPtr);
- } else {
- TclEmitOpcode( INST_INCR_STK, envPtr);
- }
- } else if (isScalar) { /* Simple scalar variable. */
- if (localIndex >= 0) {
- if (haveImmValue) {
- TclEmitInstInt1(INST_INCR_SCALAR1_IMM, localIndex, envPtr);
- TclEmitInt1(immValue, envPtr);
- } else {
- TclEmitInstInt1(INST_INCR_SCALAR1, localIndex, envPtr);
- }
- } else {
- if (haveImmValue) {
- TclEmitInstInt1(INST_INCR_SCALAR_STK_IMM, immValue, envPtr);
- } else {
- TclEmitOpcode( INST_INCR_SCALAR_STK, envPtr);
- }
- }
- } else { /* Simple array variable. */
- if (localIndex >= 0) {
- if (haveImmValue) {
- TclEmitInstInt1(INST_INCR_ARRAY1_IMM, localIndex, envPtr);
- TclEmitInt1(immValue, envPtr);
- } else {
- TclEmitInstInt1(INST_INCR_ARRAY1, localIndex, envPtr);
- }
- } else {
- if (haveImmValue) {
- TclEmitInstInt1(INST_INCR_ARRAY_STK_IMM, immValue, envPtr);
- } else {
- TclEmitOpcode( INST_INCR_ARRAY_STK, envPtr);
- }
- }
- }
-
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileInfo*Cmd --
- *
- * Procedures called to compile "info" subcommands.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "info" subcommand at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileInfoCommandsCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr)
-{
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *tokenPtr;
- Tcl_Obj *objPtr;
- char *bytes;
-
- /*
- * We require one compile-time known argument for the case we can compile.
- */
-
- if (parsePtr->numWords == 1) {
- return TclCompileBasic0ArgCmd(interp, parsePtr, cmdPtr, envPtr);
- } else if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
- tokenPtr = TokenAfter(parsePtr->tokenPtr);
- objPtr = Tcl_NewObj();
- Tcl_IncrRefCount(objPtr);
- if (!TclWordKnownAtCompileTime(tokenPtr, objPtr)) {
- goto notCompilable;
- }
- bytes = Tcl_GetString(objPtr);
-
- /*
- * We require that the argument start with "::" and not have any of "*\[?"
- * in it. (Theoretically, we should look in only the final component, but
- * the difference is so slight given current naming practices.)
- */
-
- if (bytes[0] != ':' || bytes[1] != ':' || !TclMatchIsTrivial(bytes)) {
- goto notCompilable;
- }
- Tcl_DecrRefCount(objPtr);
-
- /*
- * Confirmed as a literal that will not frighten the horses. Compile. Note
- * that the result needs to be list-ified.
- */
-
- CompileWord(envPtr, tokenPtr, interp, 1);
- TclEmitOpcode( INST_RESOLVE_COMMAND, envPtr);
- TclEmitOpcode( INST_DUP, envPtr);
- TclEmitOpcode( INST_STR_LEN, envPtr);
- TclEmitInstInt1( INST_JUMP_FALSE1, 7, envPtr);
- TclEmitInstInt4( INST_LIST, 1, envPtr);
- return TCL_OK;
-
- notCompilable:
- Tcl_DecrRefCount(objPtr);
- return TclCompileBasic1ArgCmd(interp, parsePtr, cmdPtr, envPtr);
-}
-
-int
-TclCompileInfoCoroutineCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- /*
- * Only compile [info coroutine] without arguments.
- */
-
- if (parsePtr->numWords != 1) {
- return TCL_ERROR;
- }
-
- /*
- * Not much to do; we compile to a single instruction...
- */
-
- TclEmitOpcode( INST_COROUTINE_NAME, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileInfoExistsCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * 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) {
- TclEmitOpcode( INST_EXIST_STK, envPtr);
- } else 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);
- }
- }
-
- return TCL_OK;
-}
-
-int
-TclCompileInfoLevelCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- /*
- * Only compile [info level] without arguments or with a single argument.
- */
-
- if (parsePtr->numWords == 1) {
- /*
- * Not much to do; we compile to a single instruction...
- */
-
- TclEmitOpcode( INST_INFO_LEVEL_NUM, envPtr);
- } else if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- } else {
- DefineLineInformation; /* TIP #280 */
-
- /*
- * Compile the argument, then add the instruction to convert it into a
- * list of arguments.
- */
-
- SetLineInformation(1);
- CompileTokens(envPtr, TokenAfter(parsePtr->tokenPtr), interp);
- TclEmitOpcode( INST_INFO_LEVEL_ARGS, envPtr);
- }
- return TCL_OK;
-}
-
-int
-TclCompileInfoObjectClassCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr)
-{
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
- CompileWord(envPtr, tokenPtr, interp, 1);
- TclEmitOpcode( INST_TCLOO_CLASS, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileInfoObjectIsACmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr)
-{
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- /*
- * We only handle [info object isa object <somevalue>]. The first three
- * words are compressed to a single token by the ensemble compilation
- * engine.
- */
-
- if (parsePtr->numWords != 3) {
- return TCL_ERROR;
- }
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size < 1
- || strncmp(tokenPtr[1].start, "object", tokenPtr[1].size)) {
- return TCL_ERROR;
- }
- tokenPtr = TokenAfter(tokenPtr);
-
- /*
- * Issue the code.
- */
-
- CompileWord(envPtr, tokenPtr, interp, 2);
- TclEmitOpcode( INST_TCLOO_IS_OBJECT, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileInfoObjectNamespaceCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr)
-{
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
- CompileWord(envPtr, tokenPtr, interp, 1);
- TclEmitOpcode( INST_TCLOO_NS, envPtr);
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLappendCmd --
- *
- * Procedure called to compile the "lappend" 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 "lappend" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLappendCmd(
- 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 simpleVarName, isScalar, localIndex, numWords, i, fwd, offsetFwd;
- DefineLineInformation; /* TIP #280 */
-
- /*
- * If we're not in a procedure, don't compile.
- */
-
- if (envPtr->procPtr == NULL) {
- return TCL_ERROR;
- }
-
- numWords = parsePtr->numWords;
- if (numWords == 1) {
- return TCL_ERROR;
- }
- if (numWords != 3) {
- /*
- * LAPPEND instructions currently only handle one value, but we can
- * handle some multi-value cases by stringing them together.
- */
-
- goto lappendMultiple;
- }
-
- /*
- * Decide if we can use a frame slot for the var/array name or if we
- * need to emit code to compute and push the name at runtime. We use a
- * frame slot (entry in the array of local vars) if we are compiling a
- * procedure body and if the name is simple text that does not include
- * namespace qualifiers.
- */
-
- varTokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- PushVarNameWord(interp, varTokenPtr, envPtr, 0,
- &localIndex, &simpleVarName, &isScalar, 1);
-
- /*
- * If we are doing an assignment, push the new value. In the no values
- * case, create an empty object.
- */
-
- if (numWords > 2) {
- Tcl_Token *valueTokenPtr = TokenAfter(varTokenPtr);
-
- CompileWord(envPtr, valueTokenPtr, interp, 2);
- }
-
- /*
- * Emit instructions to set/get the variable.
- */
-
- /*
- * The *_STK opcodes should be refactored to make better use of existing
- * LOAD/STORE instructions.
- */
-
- if (!simpleVarName) {
- TclEmitOpcode( INST_LAPPEND_STK, envPtr);
- } else if (isScalar) {
- if (localIndex < 0) {
- TclEmitOpcode( INST_LAPPEND_STK, envPtr);
- } else {
- Emit14Inst( INST_LAPPEND_SCALAR, localIndex, envPtr);
- }
- } else {
- if (localIndex < 0) {
- TclEmitOpcode( INST_LAPPEND_ARRAY_STK, envPtr);
- } else {
- Emit14Inst( INST_LAPPEND_ARRAY, localIndex, envPtr);
- }
- }
-
- return TCL_OK;
-
- lappendMultiple:
- /*
- * Can only handle the case where we are appending to a local scalar when
- * there are multiple values to append. Fortunately, this is common.
- */
-
- if (envPtr->procPtr == NULL) {
- return TCL_ERROR;
- }
- varTokenPtr = TokenAfter(parsePtr->tokenPtr);
- PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_ELEMENT,
- &localIndex, &simpleVarName, &isScalar, 1);
- if (!isScalar || localIndex < 0) {
- return TCL_ERROR;
- }
-
- /*
- * Definitely appending to a local scalar; generate the words and append
- * them.
- */
-
- valueTokenPtr = TokenAfter(varTokenPtr);
- for (i = 2 ; i < numWords ; i++) {
- CompileWord(envPtr, valueTokenPtr, interp, i);
- valueTokenPtr = TokenAfter(valueTokenPtr);
- }
- TclEmitInstInt4( INST_LIST, numWords-2, envPtr);
- TclEmitInstInt4( INST_EXIST_SCALAR, localIndex, envPtr);
- offsetFwd = CurrentOffset(envPtr);
- TclEmitInstInt1( INST_JUMP_FALSE1, 0, envPtr);
- Emit14Inst( INST_LOAD_SCALAR, localIndex, envPtr);
- TclEmitInstInt4( INST_REVERSE, 2, envPtr);
- TclEmitOpcode( INST_LIST_CONCAT, envPtr);
- fwd = CurrentOffset(envPtr) - offsetFwd;
- TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1);
- Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
-
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLassignCmd --
- *
- * Procedure called to compile the "lassign" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "lassign" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLassignCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *tokenPtr;
- int simpleVarName, isScalar, localIndex, numWords, idx;
- DefineLineInformation; /* TIP #280 */
-
- numWords = parsePtr->numWords;
-
- /*
- * Check for command syntax error, but we'll punt that to runtime.
- */
-
- if (numWords < 3) {
- return TCL_ERROR;
- }
-
- /*
- * Generate code to push list being taken apart by [lassign].
- */
-
- tokenPtr = TokenAfter(parsePtr->tokenPtr);
- CompileWord(envPtr, tokenPtr, interp, 1);
-
- /*
- * Generate code to assign values from the list to variables.
- */
-
- for (idx=0 ; idx<numWords-2 ; idx++) {
- tokenPtr = TokenAfter(tokenPtr);
-
- /*
- * Generate the next variable name.
- */
-
- PushVarNameWord(interp, tokenPtr, envPtr, 0, &localIndex,
- &simpleVarName, &isScalar, idx+2);
-
- /*
- * Emit instructions to get the idx'th item out of the list value on
- * the stack and assign it to the variable.
- */
-
- if (!simpleVarName) {
- TclEmitInstInt4( INST_OVER, 1, envPtr);
- TclEmitInstInt4( INST_LIST_INDEX_IMM, idx, envPtr);
- TclEmitOpcode( INST_STORE_STK, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- } else if (isScalar) {
- if (localIndex >= 0) {
- TclEmitOpcode( INST_DUP, envPtr);
- TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
- Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- } else {
- TclEmitInstInt4(INST_OVER, 1, envPtr);
- TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
- TclEmitOpcode( INST_STORE_SCALAR_STK, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- }
- } else {
- if (localIndex >= 0) {
- TclEmitInstInt4(INST_OVER, 1, envPtr);
- TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
- Emit14Inst( INST_STORE_ARRAY, localIndex, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- } else {
- TclEmitInstInt4(INST_OVER, 2, envPtr);
- TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
- TclEmitOpcode( INST_STORE_ARRAY_STK, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- }
- }
- }
-
- /*
- * Generate code to leave the rest of the list on the stack.
- */
-
- TclEmitInstInt4( INST_LIST_RANGE_IMM, idx, envPtr);
- TclEmitInt4( -2 /* == "end" */, envPtr);
-
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLindexCmd --
- *
- * Procedure called to compile the "lindex" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "lindex" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLindexCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *idxTokenPtr, *valTokenPtr;
- int i, numWords = parsePtr->numWords;
- DefineLineInformation; /* TIP #280 */
-
- /*
- * Quit if too few args.
- */
-
- if (numWords <= 1) {
- return TCL_ERROR;
- }
-
- valTokenPtr = TokenAfter(parsePtr->tokenPtr);
- if (numWords != 3) {
- goto emitComplexLindex;
- }
-
- idxTokenPtr = TokenAfter(valTokenPtr);
- if (idxTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
- Tcl_Obj *tmpObj;
- int idx, result;
-
- tmpObj = Tcl_NewStringObj(idxTokenPtr[1].start, idxTokenPtr[1].size);
- result = TclGetIntFromObj(NULL, tmpObj, &idx);
- if (result == TCL_OK) {
- if (idx < 0) {
- result = TCL_ERROR;
- }
- } else {
- result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx);
- if (result == TCL_OK && idx > -2) {
- result = TCL_ERROR;
- }
- }
- TclDecrRefCount(tmpObj);
-
- if (result == TCL_OK) {
- /*
- * All checks have been completed, and we have exactly one of
- * these constructs:
- * lindex <arbitraryValue> <posInt>
- * lindex <arbitraryValue> end-<posInt>
- * This is best compiled as a push of the arbitrary value followed
- * by an "immediate lindex" which is the most efficient variety.
- */
-
- CompileWord(envPtr, valTokenPtr, interp, 1);
- TclEmitInstInt4( INST_LIST_INDEX_IMM, idx, envPtr);
- return TCL_OK;
- }
-
- /*
- * If the conversion failed or the value was negative, we just keep on
- * going with the more complex compilation.
- */
- }
-
- /*
- * Push the operands onto the stack.
- */
-
- emitComplexLindex:
- for (i=1 ; i<numWords ; i++) {
- CompileWord(envPtr, valTokenPtr, interp, i);
- valTokenPtr = TokenAfter(valTokenPtr);
- }
-
- /*
- * Emit INST_LIST_INDEX if objc==3, or INST_LIST_INDEX_MULTI if there are
- * multiple index args.
- */
-
- if (numWords == 3) {
- TclEmitOpcode( INST_LIST_INDEX, envPtr);
- } else {
- TclEmitInstInt4( INST_LIST_INDEX_MULTI, numWords-1, envPtr);
- }
-
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileListCmd --
- *
- * Procedure called to compile the "list" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "list" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileListCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *valueTokenPtr;
- int i, numWords, concat, build;
- Tcl_Obj *listObj, *objPtr;
-
- if (parsePtr->numWords == 1) {
- /*
- * [list] without arguments just pushes an empty object.
- */
-
- PushLiteral(envPtr, "", 0);
- return TCL_OK;
- }
-
- /*
- * Test if all arguments are compile-time known. If they are, we can
- * implement with a simple push.
- */
-
- numWords = parsePtr->numWords;
- valueTokenPtr = TokenAfter(parsePtr->tokenPtr);
- listObj = Tcl_NewObj();
- for (i = 1; i < numWords && listObj != NULL; i++) {
- objPtr = Tcl_NewObj();
- if (TclWordKnownAtCompileTime(valueTokenPtr, objPtr)) {
- (void) Tcl_ListObjAppendElement(NULL, listObj, objPtr);
- } else {
- Tcl_DecrRefCount(objPtr);
- Tcl_DecrRefCount(listObj);
- listObj = NULL;
- }
- valueTokenPtr = TokenAfter(valueTokenPtr);
- }
- if (listObj != NULL) {
- int len;
- const char *bytes = Tcl_GetStringFromObj(listObj, &len);
-
- PushLiteral(envPtr, bytes, len);
- Tcl_DecrRefCount(listObj);
- if (len > 0) {
- /*
- * Force list interpretation!
- */
-
- TclEmitOpcode( INST_DUP, envPtr);
- TclEmitOpcode( INST_LIST_LENGTH, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- }
- return TCL_OK;
- }
-
- /*
- * Push the all values onto the stack.
- */
-
- numWords = parsePtr->numWords;
- valueTokenPtr = TokenAfter(parsePtr->tokenPtr);
- concat = build = 0;
- for (i = 1; i < numWords; i++) {
- if (valueTokenPtr->type == TCL_TOKEN_EXPAND_WORD && build > 0) {
- TclEmitInstInt4( INST_LIST, build, envPtr);
- if (concat) {
- TclEmitOpcode( INST_LIST_CONCAT, envPtr);
- }
- build = 0;
- concat = 1;
- }
- CompileWord(envPtr, valueTokenPtr, interp, i);
- if (valueTokenPtr->type == TCL_TOKEN_EXPAND_WORD) {
- if (concat) {
- TclEmitOpcode( INST_LIST_CONCAT, envPtr);
- } else {
- concat = 1;
- }
- } else {
- build++;
- }
- valueTokenPtr = TokenAfter(valueTokenPtr);
- }
- if (build > 0) {
- TclEmitInstInt4( INST_LIST, build, envPtr);
- if (concat) {
- TclEmitOpcode( INST_LIST_CONCAT, envPtr);
- }
- }
-
- /*
- * If there was just one expanded word, we must ensure that it is a list
- * at this point. We use an [lrange ... 0 end] for this (instead of
- * [llength], as with literals) as we must drop any string representation
- * that might be hanging around.
- */
-
- if (concat && numWords == 2) {
- TclEmitInstInt4( INST_LIST_RANGE_IMM, 0, envPtr);
- TclEmitInt4( -2, envPtr);
- }
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLlengthCmd --
- *
- * Procedure called to compile the "llength" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "llength" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLlengthCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *varTokenPtr;
- DefineLineInformation; /* TIP #280 */
-
- if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
- varTokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- CompileWord(envPtr, varTokenPtr, interp, 1);
- TclEmitOpcode( INST_LIST_LENGTH, envPtr);
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLrangeCmd --
- *
- * How to compile the "lrange" command. We only bother because we needed
- * the opcode anyway for "lassign".
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLrangeCmd(
- Tcl_Interp *interp, /* Tcl interpreter for context. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the
- * command. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds the resulting instructions. */
-{
- Tcl_Token *tokenPtr, *listTokenPtr;
- DefineLineInformation; /* TIP #280 */
- Tcl_Obj *tmpObj;
- int idx1, idx2, result;
-
- if (parsePtr->numWords != 4) {
- return TCL_ERROR;
- }
- listTokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- /*
- * Parse the first index. Will only compile if it is constant and not an
- * _integer_ less than zero (since we reserve negative indices here for
- * end-relative indexing).
- */
-
- tokenPtr = TokenAfter(listTokenPtr);
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- return TCL_ERROR;
- }
- tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
- result = TclGetIntFromObj(NULL, tmpObj, &idx1);
- if (result == TCL_OK) {
- if (idx1 < 0) {
- result = TCL_ERROR;
- }
- } else {
- result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx1);
- if (result == TCL_OK && idx1 > -2) {
- result = TCL_ERROR;
- }
- }
- TclDecrRefCount(tmpObj);
- if (result != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * Parse the second index. Will only compile if it is constant and not an
- * _integer_ less than zero (since we reserve negative indices here for
- * end-relative indexing).
- */
-
- tokenPtr = TokenAfter(tokenPtr);
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- return TCL_ERROR;
- }
- tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
- result = TclGetIntFromObj(NULL, tmpObj, &idx2);
- if (result == TCL_OK) {
- if (idx2 < 0) {
- result = TCL_ERROR;
- }
- } else {
- result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx2);
- if (result == TCL_OK && idx2 > -2) {
- result = TCL_ERROR;
- }
- }
- TclDecrRefCount(tmpObj);
- if (result != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * Issue instructions. It's not safe to skip doing the LIST_RANGE, as
- * we've not proved that the 'list' argument is really a list. Not that it
- * is worth trying to do that given current knowledge.
- */
-
- CompileWord(envPtr, listTokenPtr, interp, 1);
- TclEmitInstInt4( INST_LIST_RANGE_IMM, idx1, envPtr);
- TclEmitInt4( idx2, envPtr);
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLreplaceCmd --
- *
- * How to compile the "lreplace" command. We only bother with the case
- * where there are no elements to insert and where both the 'first' and
- * 'last' arguments are constant and one can be deterined to be at the
- * end of the list. (This is the case that could also be written with
- * "lrange".)
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLreplaceCmd(
- Tcl_Interp *interp, /* Tcl interpreter for context. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the
- * command. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds the resulting instructions. */
-{
- Tcl_Token *tokenPtr, *listTokenPtr;
- DefineLineInformation; /* TIP #280 */
- Tcl_Obj *tmpObj;
- int idx1, idx2, result, guaranteedDropAll = 0;
-
- if (parsePtr->numWords != 4) {
- return TCL_ERROR;
- }
- listTokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- /*
- * Parse the first index. Will only compile if it is constant and not an
- * _integer_ less than zero (since we reserve negative indices here for
- * end-relative indexing).
- */
-
- tokenPtr = TokenAfter(listTokenPtr);
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- return TCL_ERROR;
- }
- tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
- result = TclGetIntFromObj(NULL, tmpObj, &idx1);
- if (result == TCL_OK) {
- if (idx1 < 0) {
- result = TCL_ERROR;
- }
- } else {
- result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx1);
- if (result == TCL_OK && idx1 > -2) {
- result = TCL_ERROR;
- }
- }
- TclDecrRefCount(tmpObj);
- if (result != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * Parse the second index. Will only compile if it is constant and not an
- * _integer_ less than zero (since we reserve negative indices here for
- * end-relative indexing).
- */
-
- tokenPtr = TokenAfter(tokenPtr);
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- return TCL_ERROR;
- }
- tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
- result = TclGetIntFromObj(NULL, tmpObj, &idx2);
- if (result == TCL_OK) {
- if (idx2 < 0) {
- result = TCL_ERROR;
- }
- } else {
- result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx2);
- if (result == TCL_OK && idx2 > -2) {
- result = TCL_ERROR;
- }
- }
- TclDecrRefCount(tmpObj);
- if (result != TCL_OK) {
- return TCL_ERROR;
- }
-
- /*
- * Sanity check: can only issue when we're removing a range at one or
- * other end of the list. If we're at one end or the other, convert the
- * indices into the equivalent for an [lrange].
- */
-
- if (idx1 == 0) {
- if (idx2 == -2) {
- guaranteedDropAll = 1;
- }
- idx1 = idx2 + 1;
- idx2 = -2;
- } else if (idx2 == -2) {
- idx2 = idx1 - 1;
- idx1 = 0;
- } else {
- return TCL_ERROR;
- }
-
- /*
- * Issue instructions. It's not safe to skip doing the LIST_RANGE, as
- * we've not proved that the 'list' argument is really a list. Not that it
- * is worth trying to do that given current knowledge.
- */
-
- CompileWord(envPtr, listTokenPtr, interp, 1);
- if (guaranteedDropAll) {
- TclEmitOpcode( INST_LIST_LENGTH, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- PushLiteral(envPtr, "", 0);
- } else {
- TclEmitInstInt4( INST_LIST_RANGE_IMM, idx1, envPtr);
- TclEmitInt4( idx2, envPtr);
- }
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLsetCmd --
- *
- * Procedure called to compile the "lset" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "lset" command at
- * runtime.
- *
- * The general template for execution of the "lset" command is:
- * (1) Instructions to push the variable name, unless the variable is
- * local to the stack frame.
- * (2) If the variable is an array element, instructions to push the
- * array element name.
- * (3) Instructions to push each of zero or more "index" arguments to the
- * stack, followed with the "newValue" element.
- * (4) Instructions to duplicate the variable name and/or array element
- * name onto the top of the stack, if either was pushed at steps (1)
- * and (2).
- * (5) The appropriate INST_LOAD_* instruction to place the original
- * value of the list variable at top of stack.
- * (6) At this point, the stack contains:
- * varName? arrayElementName? index1 index2 ... newValue oldList
- * The compiler emits one of INST_LSET_FLAT or INST_LSET_LIST
- * according as whether there is exactly one index element (LIST) or
- * either zero or else two or more (FLAT). This instruction removes
- * everything from the stack except for the two names and pushes the
- * new value of the variable.
- * (7) Finally, INST_STORE_* stores the new value in the variable and
- * cleans up the stack.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLsetCmd(
- Tcl_Interp *interp, /* Tcl interpreter for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the
- * command. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds the resulting instructions. */
-{
- int tempDepth; /* Depth used for emitting one part of the
- * code burst. */
- Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing the
- * parse of the variable name. */
- int localIndex; /* Index of var in local var table. */
- int simpleVarName; /* Flag == 1 if var name is simple. */
- int isScalar; /* Flag == 1 if scalar, 0 if array. */
- int i;
- DefineLineInformation; /* TIP #280 */
-
- /*
- * Check argument count.
- */
-
- if (parsePtr->numWords < 3) {
- /*
- * Fail at run time, not in compilation.
- */
-
- return TCL_ERROR;
- }
-
- /*
- * Decide if we can use a frame slot for the var/array name or if we need
- * to emit code to compute and push the name at runtime. We use a frame
- * slot (entry in the array of local vars) if we are compiling a procedure
- * body and if the name is simple text that does not include namespace
- * qualifiers.
- */
-
- varTokenPtr = TokenAfter(parsePtr->tokenPtr);
- PushVarNameWord(interp, varTokenPtr, envPtr, 0,
- &localIndex, &simpleVarName, &isScalar, 1);
-
- /*
- * Push the "index" args and the new element value.
- */
-
- for (i=2 ; i<parsePtr->numWords ; ++i) {
- varTokenPtr = TokenAfter(varTokenPtr);
- CompileWord(envPtr, varTokenPtr, interp, i);
- }
-
- /*
- * Duplicate the variable name if it's been pushed.
- */
-
- if (!simpleVarName || localIndex < 0) {
- if (!simpleVarName || isScalar) {
- tempDepth = parsePtr->numWords - 2;
- } else {
- tempDepth = parsePtr->numWords - 1;
- }
- TclEmitInstInt4( INST_OVER, tempDepth, envPtr);
- }
-
- /*
- * Duplicate an array index if one's been pushed.
- */
-
- if (simpleVarName && !isScalar) {
- if (localIndex < 0) {
- tempDepth = parsePtr->numWords - 1;
- } else {
- tempDepth = parsePtr->numWords - 2;
- }
- TclEmitInstInt4( INST_OVER, tempDepth, envPtr);
- }
-
- /*
- * Emit code to load the variable's value.
- */
-
- if (!simpleVarName) {
- TclEmitOpcode( INST_LOAD_STK, envPtr);
- } else if (isScalar) {
- if (localIndex < 0) {
- TclEmitOpcode( INST_LOAD_SCALAR_STK, envPtr);
- } else {
- Emit14Inst( INST_LOAD_SCALAR, localIndex, envPtr);
- }
- } else {
- if (localIndex < 0) {
- TclEmitOpcode( INST_LOAD_ARRAY_STK, envPtr);
- } else {
- Emit14Inst( INST_LOAD_ARRAY, localIndex, envPtr);
- }
- }
-
- /*
- * Emit the correct variety of 'lset' instruction.
- */
-
- if (parsePtr->numWords == 4) {
- TclEmitOpcode( INST_LSET_LIST, envPtr);
- } else {
- TclEmitInstInt4( INST_LSET_FLAT, parsePtr->numWords-1, envPtr);
- }
-
- /*
- * Emit code to put the value back in the variable.
- */
-
- if (!simpleVarName) {
- TclEmitOpcode( INST_STORE_STK, envPtr);
- } else if (isScalar) {
- if (localIndex < 0) {
- TclEmitOpcode( INST_STORE_SCALAR_STK, envPtr);
- } else {
- Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
- }
- } else {
- if (localIndex < 0) {
- TclEmitOpcode( INST_STORE_ARRAY_STK, envPtr);
- } else {
- Emit14Inst( INST_STORE_ARRAY, localIndex, envPtr);
- }
- }
-
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileLmapCmd --
- *
- * Procedure called to compile the "lmap" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "lmap" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileLmapCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- return CompileEachloopCmd(interp, parsePtr, cmdPtr, envPtr,
- TCL_EACH_COLLECT);
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileNamespace*Cmd --
- *
- * Procedures called to compile the "namespace" command; currently, only
- * the subcommands "namespace current" and "namespace upvar" are compiled
- * to bytecodes, and the latter only inside a procedure(-like) context.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "namespace upvar"
- * command at runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileNamespaceCurrentCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- /*
- * Only compile [namespace current] without arguments.
- */
-
- if (parsePtr->numWords != 1) {
- return TCL_ERROR;
- }
-
- /*
- * Not much to do; we compile to a single instruction...
- */
-
- TclEmitOpcode( INST_NS_CURRENT, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileNamespaceCodeCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *tokenPtr;
- DefineLineInformation; /* TIP #280 */
-
- if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
- tokenPtr = TokenAfter(parsePtr->tokenPtr);
-
- /*
- * The specification of [namespace code] is rather shocking, in that it is
- * supposed to check if the argument is itself the result of [namespace
- * code] and not apply itself in that case. Which is excessively cautious,
- * but what the test suite checks for.
- */
-
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || (tokenPtr[1].size > 20
- && strncmp(tokenPtr[1].start, "::namespace inscope ", 20) == 0)) {
- /*
- * Technically, we could just pass a literal '::namespace inscope '
- * term through, but that's something which really shouldn't be
- * occurring as something that the user writes so we'll just punt it.
- */
-
- return TCL_ERROR;
- }
-
- /*
- * Now we can compile using the same strategy as [namespace code]'s normal
- * implementation does internally. Note that we can't bind the namespace
- * name directly here, because TclOO plays complex games with namespaces;
- * the value needs to be determined at runtime for safety.
- */
-
- PushLiteral(envPtr, "::namespace", 11);
- PushLiteral(envPtr, "inscope", 7);
- TclEmitOpcode( INST_NS_CURRENT, envPtr);
- CompileWord(envPtr, tokenPtr, interp, 1);
- TclEmitInstInt4( INST_LIST, 4, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileNamespaceQualifiersCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
- DefineLineInformation; /* TIP #280 */
- int off;
-
- if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
-
- CompileWord(envPtr, tokenPtr, interp, 1);
- PushLiteral(envPtr, "0", 1);
- PushLiteral(envPtr, "::", 2);
- TclEmitInstInt4( INST_OVER, 2, envPtr);
- TclEmitOpcode( INST_STR_FIND_LAST, envPtr);
- off = CurrentOffset(envPtr);
- PushLiteral(envPtr, "1", 1);
- TclEmitOpcode( INST_SUB, envPtr);
- TclEmitInstInt4( INST_OVER, 2, envPtr);
- TclEmitInstInt4( INST_OVER, 1, envPtr);
- TclEmitOpcode( INST_STR_INDEX, envPtr);
- PushLiteral(envPtr, ":", 1);
- TclEmitOpcode( INST_STR_EQ, envPtr);
- off = off - CurrentOffset(envPtr);
- TclEmitInstInt1( INST_JUMP_TRUE1, off, envPtr);
- TclEmitOpcode( INST_STR_RANGE, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileNamespaceTailCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
- DefineLineInformation; /* TIP #280 */
- JumpFixup jumpFixup;
-
- if (parsePtr->numWords != 2) {
- return TCL_ERROR;
- }
-
- /*
- * Take care; only add 2 to found index if the string was actually found.
- */
-
- CompileWord(envPtr, tokenPtr, interp, 1);
- PushLiteral(envPtr, "::", 2);
- TclEmitInstInt4( INST_OVER, 1, envPtr);
- TclEmitOpcode( INST_STR_FIND_LAST, envPtr);
- TclEmitOpcode( INST_DUP, envPtr);
- PushLiteral(envPtr, "0", 1);
- TclEmitOpcode( INST_GE, envPtr);
- TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFixup);
- PushLiteral(envPtr, "2", 1);
- TclEmitOpcode( INST_ADD, envPtr);
- TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127);
- PushLiteral(envPtr, "end", 3);
- TclEmitOpcode( INST_STR_RANGE, envPtr);
- return TCL_OK;
-}
-
-int
-TclCompileNamespaceUpvarCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * 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;
-}
-
-int
-TclCompileNamespaceWhichCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *tokenPtr, *opt;
- int idx;
-
- if (parsePtr->numWords < 2 || parsePtr->numWords > 3) {
- return TCL_ERROR;
- }
- tokenPtr = TokenAfter(parsePtr->tokenPtr);
- idx = 1;
-
- /*
- * If there's an option, check that it's "-command". We don't handle
- * "-variable" (currently) and anything else is an error.
- */
-
- if (parsePtr->numWords == 3) {
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- return TCL_ERROR;
- }
- opt = tokenPtr + 1;
- if (opt->size < 2 || opt->size > 8
- || strncmp(opt->start, "-command", opt->size) != 0) {
- return TCL_ERROR;
- }
- tokenPtr = TokenAfter(tokenPtr);
- idx++;
- }
-
- /*
- * Issue the bytecode.
- */
-
- CompileWord(envPtr, tokenPtr, interp, idx);
- TclEmitOpcode( INST_RESOLVE_COMMAND, envPtr);
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileRegexpCmd --
- *
- * Procedure called to compile the "regexp" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "regexp" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileRegexpCmd(
- Tcl_Interp *interp, /* Tcl interpreter for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the
- * command. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds the resulting instructions. */
-{
- Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing the
- * parse of the RE or string. */
- int i, len, nocase, exact, sawLast, simple;
- const char *str;
- DefineLineInformation; /* TIP #280 */
-
- /*
- * We are only interested in compiling simple regexp cases. Currently
- * supported compile cases are:
- * regexp ?-nocase? ?--? staticString $var
- * regexp ?-nocase? ?--? {^staticString$} $var
- */
-
- if (parsePtr->numWords < 3) {
- return TCL_ERROR;
- }
-
- simple = 0;
- nocase = 0;
- sawLast = 0;
- varTokenPtr = parsePtr->tokenPtr;
-
- /*
- * We only look for -nocase and -- as options. Everything else gets pushed
- * to runtime execution. This is different than regexp's runtime option
- * handling, but satisfies our stricter needs.
- */
-
- for (i = 1; i < parsePtr->numWords - 2; i++) {
- varTokenPtr = TokenAfter(varTokenPtr);
- if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
- /*
- * Not a simple string, so punt to runtime.
- */
-
- return TCL_ERROR;
- }
- str = varTokenPtr[1].start;
- len = varTokenPtr[1].size;
- if ((len == 2) && (str[0] == '-') && (str[1] == '-')) {
- sawLast++;
- i++;
- break;
- } else if ((len > 1) && (strncmp(str,"-nocase",(unsigned)len) == 0)) {
- nocase = 1;
- } else {
- /*
- * Not an option we recognize.
- */
-
- return TCL_ERROR;
- }
- }
-
- if ((parsePtr->numWords - i) != 2) {
- /*
- * We don't support capturing to variables.
- */
-
- return TCL_ERROR;
- }
-
- /*
- * Get the regexp string. If it is not a simple string or can't be
- * converted to a glob pattern, push the word for the INST_REGEXP.
- * Keep changes here in sync with TclCompileSwitchCmd Switch_Regexp.
- */
-
- varTokenPtr = TokenAfter(varTokenPtr);
-
- if (varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
- Tcl_DString ds;
-
- str = varTokenPtr[1].start;
- len = varTokenPtr[1].size;
-
- /*
- * If it has a '-', it could be an incorrectly formed regexp command.
- */
-
- if ((*str == '-') && !sawLast) {
- return TCL_ERROR;
- }
-
- if (len == 0) {
- /*
- * The semantics of regexp are always match on re == "".
- */
-
- PushLiteral(envPtr, "1", 1);
- return TCL_OK;
- }
-
- /*
- * Attempt to convert pattern to glob. If successful, push the
- * converted pattern as a literal.
- */
-
- if (TclReToGlob(NULL, varTokenPtr[1].start, len, &ds, &exact)
- == TCL_OK) {
- simple = 1;
- PushLiteral(envPtr, Tcl_DStringValue(&ds),Tcl_DStringLength(&ds));
- Tcl_DStringFree(&ds);
- }
- }
-
- if (!simple) {
- CompileWord(envPtr, varTokenPtr, interp, parsePtr->numWords-2);
- }
-
- /*
- * Push the string arg.
- */
-
- varTokenPtr = TokenAfter(varTokenPtr);
- CompileWord(envPtr, varTokenPtr, interp, parsePtr->numWords-1);
-
- if (simple) {
- if (exact && !nocase) {
- TclEmitOpcode( INST_STR_EQ, envPtr);
- } else {
- TclEmitInstInt1( INST_STR_MATCH, nocase, envPtr);
- }
- } else {
- /*
- * Pass correct RE compile flags. We use only Int1 (8-bit), but
- * that handles all the flags we want to pass.
- * Don't use TCL_REG_NOSUB as we may have backrefs.
- */
-
- int cflags = TCL_REG_ADVANCED | (nocase ? TCL_REG_NOCASE : 0);
-
- TclEmitInstInt1( INST_REGEXP, cflags, envPtr);
- }
-
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileRegsubCmd --
- *
- * Procedure called to compile the "regsub" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "regsub" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileRegsubCmd(
- Tcl_Interp *interp, /* Tcl interpreter for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the
- * command. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds the resulting instructions. */
-{
- /*
- * We only compile the case with [regsub -all] where the pattern is both
- * known at compile time and simple (i.e., no RE metacharacters). That is,
- * the pattern must be translatable into a glob like "*foo*" with no other
- * glob metacharacters inside it; there must be some "foo" in there too.
- * The substitution string must also be known at compile time and free of
- * metacharacters ("\digit" and "&"). Finally, there must not be a
- * variable mentioned in the [regsub] to write the result back to (because
- * we can't get the count of substitutions that would be the result in
- * that case). The key is that these are the conditions under which a
- * [string map] could be used instead, in particular a [string map] of the
- * form we can compile to bytecode.
- *
- * In short, we look for:
- *
- * regsub -all [--] simpleRE string simpleReplacement
- *
- * The only optional part is the "--", and no other options are handled.
- */
-
- DefineLineInformation; /* TIP #280 */
- Tcl_Token *tokenPtr, *stringTokenPtr;
- Tcl_Obj *patternObj = NULL, *replacementObj = NULL;
- Tcl_DString pattern;
- const char *bytes;
- int len, exact, result = TCL_ERROR;
-
- if (parsePtr->numWords < 5 || parsePtr->numWords > 6) {
- return TCL_ERROR;
- }
-
- /*
- * Parse the "-all", which must be the first argument (other options not
- * supported, non-"-all" substitution we can't compile).
- */
-
- tokenPtr = TokenAfter(parsePtr->tokenPtr);
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size != 4
- || strncmp(tokenPtr[1].start, "-all", 4)) {
- return TCL_ERROR;
- }
-
- /*
- * Get the pattern into patternObj, checking for "--" in the process.
- */
-
- Tcl_DStringInit(&pattern);
- tokenPtr = TokenAfter(tokenPtr);
- patternObj = Tcl_NewObj();
- if (!TclWordKnownAtCompileTime(tokenPtr, patternObj)) {
- goto done;
- }
- if (Tcl_GetString(patternObj)[0] == '-') {
- if (strcmp(Tcl_GetString(patternObj), "--") != 0
- || parsePtr->numWords == 5) {
- goto done;
- }
- tokenPtr = TokenAfter(tokenPtr);
- Tcl_DecrRefCount(patternObj);
- patternObj = Tcl_NewObj();
- if (!TclWordKnownAtCompileTime(tokenPtr, patternObj)) {
- goto done;
- }
- } else if (parsePtr->numWords == 6) {
- goto done;
- }
-
- /*
- * Identify the code which produces the string to apply the substitution
- * to (stringTokenPtr), and the replacement string (into replacementObj).
- */
-
- stringTokenPtr = TokenAfter(tokenPtr);
- tokenPtr = TokenAfter(stringTokenPtr);
- replacementObj = Tcl_NewObj();
- if (!TclWordKnownAtCompileTime(tokenPtr, replacementObj)) {
- goto done;
- }
-
- /*
- * Next, higher-level checks. Is the RE a very simple glob? Is the
- * replacement "simple"?
- */
-
- bytes = Tcl_GetStringFromObj(patternObj, &len);
- if (TclReToGlob(NULL, bytes, len, &pattern, &exact) != TCL_OK || exact) {
- goto done;
- }
- bytes = Tcl_DStringValue(&pattern);
- if (*bytes++ != '*') {
- goto done;
- }
- while (1) {
- switch (*bytes) {
- case '*':
- if (bytes[1] == '\0') {
- /*
- * OK, we've proved there are no metacharacters except for the
- * '*' at each end.
- */
-
- len = Tcl_DStringLength(&pattern) - 2;
- if (len > 0) {
- goto isSimpleGlob;
- }
-
- /*
- * The pattern is "**"! I believe that should be impossible,
- * but we definitely can't handle that at all.
- */
- }
- case '\0': case '?': case '[': case '\\':
- goto done;
- }
- bytes++;
- }
- isSimpleGlob:
- for (bytes = Tcl_GetString(replacementObj); *bytes; bytes++) {
- switch (*bytes) {
- case '\\': case '&':
- goto done;
- }
- }
-
- /*
- * Proved the simplicity constraints! Time to issue the code.
- */
-
- result = TCL_OK;
- bytes = Tcl_DStringValue(&pattern) + 1;
- PushLiteral(envPtr, bytes, len);
- bytes = Tcl_GetStringFromObj(replacementObj, &len);
- PushLiteral(envPtr, bytes, len);
- CompileWord(envPtr, stringTokenPtr, interp, parsePtr->numWords-2);
- TclEmitOpcode( INST_STR_MAP, envPtr);
-
- done:
- Tcl_DStringFree(&pattern);
- if (patternObj) {
- Tcl_DecrRefCount(patternObj);
- }
- if (replacementObj) {
- Tcl_DecrRefCount(replacementObj);
- }
- return result;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * TclCompileReturnCmd --
- *
- * Procedure called to compile the "return" command.
- *
- * Results:
- * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
- * evaluation to runtime.
- *
- * Side effects:
- * Instructions are added to envPtr to execute the "return" command at
- * runtime.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclCompileReturnCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- /*
- * General syntax: [return ?-option value ...? ?result?]
- * An even number of words means an explicit result argument is present.
- */
- int level, code, objc, size, status = TCL_OK;
- int numWords = parsePtr->numWords;
- int explicitResult = (0 == (numWords % 2));
- int numOptionWords = numWords - 1 - explicitResult;
- int savedStackDepth = envPtr->currStackDepth;
- Tcl_Obj *returnOpts, **objv;
- Tcl_Token *wordTokenPtr = TokenAfter(parsePtr->tokenPtr);
- DefineLineInformation; /* TIP #280 */
-
- /*
- * Check for special case which can always be compiled:
- * return -options <opts> <msg>
- * Unlike the normal [return] compilation, this version does everything at
- * runtime so it can handle arbitrary words and not just literals. Note
- * that if INST_RETURN_STK wasn't already needed for something else
- * ('finally' clause processing) this piece of code would not be present.
- */
-
- if ((numWords == 4) && (wordTokenPtr->type == TCL_TOKEN_SIMPLE_WORD)
- && (wordTokenPtr[1].size == 8)
- && (strncmp(wordTokenPtr[1].start, "-options", 8) == 0)) {
- Tcl_Token *optsTokenPtr = TokenAfter(wordTokenPtr);
- Tcl_Token *msgTokenPtr = TokenAfter(optsTokenPtr);
-
- CompileWord(envPtr, optsTokenPtr, interp, 2);
- CompileWord(envPtr, msgTokenPtr, interp, 3);
- TclEmitOpcode(INST_RETURN_STK, envPtr);
- envPtr->currStackDepth = savedStackDepth + 1;
- return TCL_OK;
- }
-
- /*
- * Allocate some working space.
- */
-
- objv = TclStackAlloc(interp, numOptionWords * sizeof(Tcl_Obj *));
-
- /*
- * Scan through the return options. If any are unknown at compile time,
- * there is no value in bytecompiling. Save the option values known in an
- * objv array for merging into a return options dictionary.
- */
-
- for (objc = 0; objc < numOptionWords; objc++) {
- objv[objc] = Tcl_NewObj();
- Tcl_IncrRefCount(objv[objc]);
- if (!TclWordKnownAtCompileTime(wordTokenPtr, objv[objc])) {
- /*
- * Non-literal, so punt to run-time.
- */
-
- for (; objc>=0 ; objc--) {
- TclDecrRefCount(objv[objc]);
- }
- TclStackFree(interp, objv);
- goto issueRuntimeReturn;
- }
- wordTokenPtr = TokenAfter(wordTokenPtr);
- }
- status = TclMergeReturnOptions(interp, objc, objv,
- &returnOpts, &code, &level);
- while (--objc >= 0) {
- TclDecrRefCount(objv[objc]);
- }
- TclStackFree(interp, objv);
- if (TCL_ERROR == status) {
- /*
- * Something was bogus in the return options. Clear the error message,
- * and report back to the compiler that this must be interpreted at
- * runtime.
- */
-
- Tcl_ResetResult(interp);
- return TCL_ERROR;
- }
-
- /*
- * All options are known at compile time, so we're going to bytecompile.
- * Emit instructions to push the result on the stack.
- */
-
- if (explicitResult) {
- CompileWord(envPtr, wordTokenPtr, interp, numWords-1);
- } else {
- /*
- * No explict result argument, so default result is empty string.
- */
-
- PushLiteral(envPtr, "", 0);
- }
-
- /*
- * Check for optimization: When [return] is in a proc, and there's no
- * enclosing [catch], and there are no return options, then the INST_DONE
- * instruction is equivalent, and may be more efficient.
- */
-
- if (numOptionWords == 0 && envPtr->procPtr != NULL) {
- /*
- * We have default return options and we're in a proc ...
- */
-
- int index = envPtr->exceptArrayNext - 1;
- int enclosingCatch = 0;
-
- while (index >= 0) {
- ExceptionRange range = envPtr->exceptArrayPtr[index];
-
- if ((range.type == CATCH_EXCEPTION_RANGE)
- && (range.catchOffset == -1)) {
- enclosingCatch = 1;
- break;
- }
- index--;
- }
- if (!enclosingCatch) {
- /*
- * ... and there is no enclosing catch. Issue the maximally
- * efficient exit instruction.
- */
-
- Tcl_DecrRefCount(returnOpts);
- TclEmitOpcode(INST_DONE, envPtr);
- envPtr->currStackDepth = savedStackDepth;
- return TCL_OK;
- }
- }
-
- /* Optimize [return -level 0 $x]. */
- Tcl_DictObjSize(NULL, returnOpts, &size);
- if (size == 0 && level == 0 && code == TCL_OK) {
- Tcl_DecrRefCount(returnOpts);
- return TCL_OK;
- }
-
- /*
- * Could not use the optimization, so we push the return options dict, and
- * emit the INST_RETURN_IMM instruction with code and level as operands.
- */
-
- CompileReturnInternal(envPtr, INST_RETURN_IMM, code, level, returnOpts);
- envPtr->currStackDepth = savedStackDepth + 1;
- return TCL_OK;
-
- issueRuntimeReturn:
- /*
- * Assemble the option dictionary (as a list as that's good enough).
- */
-
- wordTokenPtr = TokenAfter(parsePtr->tokenPtr);
- for (objc=1 ; objc<=numOptionWords ; objc++) {
- CompileWord(envPtr, wordTokenPtr, interp, objc);
- wordTokenPtr = TokenAfter(wordTokenPtr);
- }
- TclEmitInstInt4(INST_LIST, numOptionWords, envPtr);
-
- /*
- * Push the result.
- */
-
- if (explicitResult) {
- CompileWord(envPtr, wordTokenPtr, interp, numWords-1);
- } else {
- PushLiteral(envPtr, "", 0);
- }
-
- /*
- * Issue the RETURN itself.
- */
-
- TclEmitOpcode(INST_RETURN_STK, envPtr);
- envPtr->currStackDepth = savedStackDepth + 1;
- return TCL_OK;
-}
-
-static void
-CompileReturnInternal(
- CompileEnv *envPtr,
- unsigned char op,
- int code,
- int level,
- Tcl_Obj *returnOpts)
-{
- TclEmitPush(TclAddLiteralObj(envPtr, returnOpts, NULL), envPtr);
- TclEmitInstInt4(op, code, envPtr);
- TclEmitInt4(level, envPtr);
-}
-
-void
-TclCompileSyntaxError(
- Tcl_Interp *interp,
- CompileEnv *envPtr)
-{
- Tcl_Obj *msg = Tcl_GetObjResult(interp);
- int numBytes;
- const char *bytes = TclGetStringFromObj(msg, &numBytes);
-
- TclErrorStackResetIf(interp, bytes, numBytes);
- TclEmitPush(TclRegisterNewLiteral(envPtr, bytes, numBytes), envPtr);
- CompileReturnInternal(envPtr, INST_SYNTAX, TCL_ERROR, 0,
- TclNoErrorStack(interp, Tcl_GetReturnOptions(interp, TCL_ERROR)));
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * 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;
- const 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, 0,
- &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;
-}
-
-/*
- *----------------------------------------------------------------------
- *
- * 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=1; 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, i);
- TclEmitInstInt4( INST_VARIABLE, localIndex, envPtr);
-
- if (i+1 < numWords) {
- /*
- * A value has been given: set the variable, pop the value
- */
-
- CompileWord(envPtr, valueTokenPtr, interp, i+1);
- Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- }
- }
-
- /*
- * Set the result to empty
- */
-
- PushLiteral(envPtr, "", 0);
- 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 (!EnvHasLVT(envPtr)) {
- 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, 1, envPtr);
- Tcl_DecrRefCount(tailPtr);
- return localIndex;
-}
-
-int
-TclCompileObjectSelfCmd(
- Tcl_Interp *interp, /* Used for error reporting. */
- Tcl_Parse *parsePtr, /* Points to a parse structure for the command
- * created by Tcl_ParseCommand. */
- Command *cmdPtr, /* Points to defintion of command being
- * compiled. */
- CompileEnv *envPtr) /* Holds resulting instructions. */
-{
- /*
- * We only handle [self] and [self object] (which is the same operation).
- * These are the only very common operations on [self] for which
- * bytecoding is at all reasonable.
- */
-
- if (parsePtr->numWords == 1) {
- goto compileSelfObject;
- } else if (parsePtr->numWords == 2) {
- Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr), *subcmd;
-
- if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size==0) {
- return TCL_ERROR;
- }
-
- subcmd = tokenPtr + 1;
- if (strncmp(subcmd->start, "object", subcmd->size) == 0) {
- goto compileSelfObject;
- } else if (strncmp(subcmd->start, "namespace", subcmd->size) == 0) {
- goto compileSelfNamespace;
- }
- }
-
- /*
- * Can't compile; handle with runtime call.
- */
-
- return TCL_ERROR;
-
- compileSelfObject:
-
- /*
- * This delegates the entire problem to a single opcode.
- */
-
- TclEmitOpcode( INST_TCLOO_SELF, envPtr);
- return TCL_OK;
-
- compileSelfNamespace:
-
- /*
- * This is formally only correct with TclOO methods as they are currently
- * implemented; it assumes that the current namespace is invariably when a
- * TclOO context is present is the object's namespace, and that's
- * technically only something that's a matter of current policy. But it
- * avoids creating another opcode, so that's all good!
- */
-
- TclEmitOpcode( INST_TCLOO_SELF, envPtr);
- TclEmitOpcode( INST_POP, envPtr);
- TclEmitOpcode( INST_NS_CURRENT, envPtr);
- return TCL_OK;
-}
-
-/*
- *----------------------------------------------------------------------
- *
* PushVarName --
*
* Procedure used in the compiling where pushing a variable name is
diff --git a/generic/tclCompCmdsGR.c b/generic/tclCompCmdsGR.c
new file mode 100644
index 0000000..83a84e8
--- /dev/null
+++ b/generic/tclCompCmdsGR.c
@@ -0,0 +1,3244 @@
+/*
+ * tclCompCmdsGR.c --
+ *
+ * This file contains compilation procedures that compile various Tcl
+ * commands (beginning with the letters 'g' through 'r') into a sequence
+ * of instructions ("bytecodes").
+ *
+ * Copyright (c) 1997-1998 Sun Microsystems, Inc.
+ * Copyright (c) 2001 by Kevin B. Kenny. All rights reserved.
+ * Copyright (c) 2002 ActiveState Corporation.
+ * Copyright (c) 2004-2013 by Donal K. Fellows.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#include "tclInt.h"
+#include "tclCompile.h"
+#include <assert.h>
+
+/*
+ * Prototypes for procedures defined later in this file:
+ */
+
+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);
+static int CompileEachloopCmd(Tcl_Interp *interp,
+ Tcl_Parse *parsePtr, Command *cmdPtr,
+ CompileEnv *envPtr, int collect);
+static int CompileDictEachCmd(Tcl_Interp *interp,
+ Tcl_Parse *parsePtr, Command *cmdPtr,
+ struct CompileEnv *envPtr, int collect);
+
+
+/*
+ * Macro that encapsulates an efficiency trick that avoids a function call for
+ * the simplest of compiles. The ANSI C "prototype" for this macro is:
+ *
+ * static void CompileWord(CompileEnv *envPtr, Tcl_Token *tokenPtr,
+ * Tcl_Interp *interp, int word);
+ */
+
+#define CompileWord(envPtr, tokenPtr, interp, word) \
+ if ((tokenPtr)->type == TCL_TOKEN_SIMPLE_WORD) { \
+ TclEmitPush(TclRegisterNewLiteral((envPtr), (tokenPtr)[1].start, \
+ (tokenPtr)[1].size), (envPtr)); \
+ } else { \
+ envPtr->line = mapPtr->loc[eclIndex].line[word]; \
+ envPtr->clNext = mapPtr->loc[eclIndex].next[word]; \
+ TclCompileTokens((interp), (tokenPtr)+1, (tokenPtr)->numComponents, \
+ (envPtr)); \
+ }
+
+/*
+ * TIP #280: Remember the per-word line information of the current command. An
+ * index is used instead of a pointer as recursive compilation may reallocate,
+ * i.e. move, the array. This is also the reason to save the nuloc now, it may
+ * change during the course of the function.
+ *
+ * Macro to encapsulate the variable definition and setup.
+ */
+
+#define DefineLineInformation \
+ ExtCmdLoc *mapPtr = envPtr->extCmdMapPtr; \
+ int eclIndex = mapPtr->nuloc - 1
+
+#define SetLineInformation(word) \
+ envPtr->line = mapPtr->loc[eclIndex].line[(word)]; \
+ envPtr->clNext = mapPtr->loc[eclIndex].next[(word)]
+
+#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)])
+
+/*
+ * Often want to issue one of two versions of an instruction based on whether
+ * the argument will fit in a single byte or not. This makes it much clearer.
+ */
+
+#define Emit14Inst(nm,idx,envPtr) \
+ if (idx <= 255) { \
+ TclEmitInstInt1(nm##1,idx,envPtr); \
+ } else { \
+ TclEmitInstInt4(nm##4,idx,envPtr); \
+ }
+
+/*
+ * Flags bits used by PushVarName.
+ */
+
+#define TCL_NO_LARGE_INDEX 1 /* Do not return localIndex value > 255 */
+#define TCL_NO_ELEMENT 2 /* Do not push the array element. */
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "if" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileIfCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ JumpFixupArray jumpFalseFixupArray;
+ /* Used to fix the ifFalse jump after each
+ * test when its target PC is determined. */
+ JumpFixupArray jumpEndFixupArray;
+ /* Used to fix the jump after each "then" body
+ * to the end of the "if" when that PC is
+ * determined. */
+ Tcl_Token *tokenPtr, *testTokenPtr;
+ int jumpIndex = 0; /* Avoid compiler warning. */
+ int jumpFalseDist, numWords, wordIdx, numBytes, j, code;
+ const char *word;
+ int savedStackDepth = envPtr->currStackDepth;
+ /* Saved stack depth at the start of the first
+ * test; the envPtr current depth is restored
+ * to this value at the start of each test. */
+ int realCond = 1; /* Set to 0 for static conditions:
+ * "if 0 {..}" */
+ int boolVal; /* Value of static condition. */
+ int compileScripts = 1;
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * Only compile the "if" command if all arguments are simple words, in
+ * order to insure correct substitution [Bug 219166]
+ */
+
+ tokenPtr = parsePtr->tokenPtr;
+ wordIdx = 0;
+ numWords = parsePtr->numWords;
+
+ for (wordIdx = 0; wordIdx < numWords; wordIdx++) {
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ return TCL_ERROR;
+ }
+ tokenPtr = TokenAfter(tokenPtr);
+ }
+
+ TclInitJumpFixupArray(&jumpFalseFixupArray);
+ TclInitJumpFixupArray(&jumpEndFixupArray);
+ code = TCL_OK;
+
+ /*
+ * Each iteration of this loop compiles one "if expr ?then? body" or
+ * "elseif expr ?then? body" clause.
+ */
+
+ tokenPtr = parsePtr->tokenPtr;
+ wordIdx = 0;
+ while (wordIdx < numWords) {
+ /*
+ * Stop looping if the token isn't "if" or "elseif".
+ */
+
+ word = tokenPtr[1].start;
+ numBytes = tokenPtr[1].size;
+ if ((tokenPtr == parsePtr->tokenPtr)
+ || ((numBytes == 6) && (strncmp(word, "elseif", 6) == 0))) {
+ tokenPtr = TokenAfter(tokenPtr);
+ wordIdx++;
+ } else {
+ break;
+ }
+ if (wordIdx >= numWords) {
+ code = TCL_ERROR;
+ goto done;
+ }
+
+ /*
+ * Compile the test expression then emit the conditional jump around
+ * the "then" part.
+ */
+
+ envPtr->currStackDepth = savedStackDepth;
+ testTokenPtr = tokenPtr;
+
+ if (realCond) {
+ /*
+ * Find out if the condition is a constant.
+ */
+
+ Tcl_Obj *boolObj = Tcl_NewStringObj(testTokenPtr[1].start,
+ testTokenPtr[1].size);
+
+ Tcl_IncrRefCount(boolObj);
+ code = Tcl_GetBooleanFromObj(NULL, boolObj, &boolVal);
+ TclDecrRefCount(boolObj);
+ if (code == TCL_OK) {
+ /*
+ * A static condition.
+ */
+
+ realCond = 0;
+ if (!boolVal) {
+ compileScripts = 0;
+ }
+ } else {
+ SetLineInformation(wordIdx);
+ Tcl_ResetResult(interp);
+ TclCompileExprWords(interp, testTokenPtr, 1, envPtr);
+ if (jumpFalseFixupArray.next >= jumpFalseFixupArray.end) {
+ TclExpandJumpFixupArray(&jumpFalseFixupArray);
+ }
+ jumpIndex = jumpFalseFixupArray.next;
+ jumpFalseFixupArray.next++;
+ TclEmitForwardJump(envPtr, TCL_FALSE_JUMP,
+ jumpFalseFixupArray.fixup+jumpIndex);
+ }
+ code = TCL_OK;
+ }
+
+ /*
+ * Skip over the optional "then" before the then clause.
+ */
+
+ tokenPtr = TokenAfter(testTokenPtr);
+ wordIdx++;
+ if (wordIdx >= numWords) {
+ code = TCL_ERROR;
+ goto done;
+ }
+ if (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
+ word = tokenPtr[1].start;
+ numBytes = tokenPtr[1].size;
+ if ((numBytes == 4) && (strncmp(word, "then", 4) == 0)) {
+ tokenPtr = TokenAfter(tokenPtr);
+ wordIdx++;
+ if (wordIdx >= numWords) {
+ code = TCL_ERROR;
+ goto done;
+ }
+ }
+ }
+
+ /*
+ * Compile the "then" command body.
+ */
+
+ if (compileScripts) {
+ SetLineInformation(wordIdx);
+ envPtr->currStackDepth = savedStackDepth;
+ CompileBody(envPtr, tokenPtr, interp);
+ }
+
+ if (realCond) {
+ /*
+ * Jump to the end of the "if" command. Both jumpFalseFixupArray
+ * and jumpEndFixupArray are indexed by "jumpIndex".
+ */
+
+ if (jumpEndFixupArray.next >= jumpEndFixupArray.end) {
+ TclExpandJumpFixupArray(&jumpEndFixupArray);
+ }
+ jumpEndFixupArray.next++;
+ TclEmitForwardJump(envPtr, TCL_UNCONDITIONAL_JUMP,
+ jumpEndFixupArray.fixup+jumpIndex);
+
+ /*
+ * Fix the target of the jumpFalse after the test. Generate a 4
+ * byte jump if the distance is > 120 bytes. This is conservative,
+ * and ensures that we won't have to replace this jump if we later
+ * also need to replace the proceeding jump to the end of the "if"
+ * with a 4 byte jump.
+ */
+
+ if (TclFixupForwardJumpToHere(envPtr,
+ jumpFalseFixupArray.fixup+jumpIndex, 120)) {
+ /*
+ * Adjust the code offset for the proceeding jump to the end
+ * of the "if" command.
+ */
+
+ jumpEndFixupArray.fixup[jumpIndex].codeOffset += 3;
+ }
+ } else if (boolVal) {
+ /*
+ * We were processing an "if 1 {...}"; stop compiling scripts.
+ */
+
+ compileScripts = 0;
+ } else {
+ /*
+ * We were processing an "if 0 {...}"; reset so that the rest
+ * (elseif, else) is compiled correctly.
+ */
+
+ realCond = 1;
+ compileScripts = 1;
+ }
+
+ tokenPtr = TokenAfter(tokenPtr);
+ wordIdx++;
+ }
+
+ /*
+ * Restore the current stack depth in the environment; the "else" clause
+ * (or its default) will add 1 to this.
+ */
+
+ envPtr->currStackDepth = savedStackDepth;
+
+ /*
+ * Check for the optional else clause. Do not compile anything if this was
+ * an "if 1 {...}" case.
+ */
+
+ if ((wordIdx < numWords) && (tokenPtr->type == TCL_TOKEN_SIMPLE_WORD)) {
+ /*
+ * There is an else clause. Skip over the optional "else" word.
+ */
+
+ word = tokenPtr[1].start;
+ numBytes = tokenPtr[1].size;
+ if ((numBytes == 4) && (strncmp(word, "else", 4) == 0)) {
+ tokenPtr = TokenAfter(tokenPtr);
+ wordIdx++;
+ if (wordIdx >= numWords) {
+ code = TCL_ERROR;
+ goto done;
+ }
+ }
+
+ if (compileScripts) {
+ /*
+ * Compile the else command body.
+ */
+
+ SetLineInformation(wordIdx);
+ CompileBody(envPtr, tokenPtr, interp);
+ }
+
+ /*
+ * Make sure there are no words after the else clause.
+ */
+
+ wordIdx++;
+ if (wordIdx < numWords) {
+ code = TCL_ERROR;
+ goto done;
+ }
+ } else {
+ /*
+ * No else clause: the "if" command's result is an empty string.
+ */
+
+ if (compileScripts) {
+ PushLiteral(envPtr, "", 0);
+ }
+ }
+
+ /*
+ * Fix the unconditional jumps to the end of the "if" command.
+ */
+
+ for (j = jumpEndFixupArray.next; j > 0; j--) {
+ jumpIndex = (j - 1); /* i.e. process the closest jump first. */
+ if (TclFixupForwardJumpToHere(envPtr,
+ jumpEndFixupArray.fixup+jumpIndex, 127)) {
+ /*
+ * Adjust the immediately preceeding "ifFalse" jump. We moved it's
+ * target (just after this jump) down three bytes.
+ */
+
+ unsigned char *ifFalsePc = envPtr->codeStart
+ + jumpFalseFixupArray.fixup[jumpIndex].codeOffset;
+ unsigned char opCode = *ifFalsePc;
+
+ if (opCode == INST_JUMP_FALSE1) {
+ jumpFalseDist = TclGetInt1AtPtr(ifFalsePc + 1);
+ jumpFalseDist += 3;
+ TclStoreInt1AtPtr(jumpFalseDist, (ifFalsePc + 1));
+ } else if (opCode == INST_JUMP_FALSE4) {
+ jumpFalseDist = TclGetInt4AtPtr(ifFalsePc + 1);
+ jumpFalseDist += 3;
+ TclStoreInt4AtPtr(jumpFalseDist, (ifFalsePc + 1));
+ } else {
+ Tcl_Panic("TclCompileIfCmd: unexpected opcode \"%d\" updating ifFalse jump", (int) opCode);
+ }
+ }
+ }
+
+ /*
+ * Free the jumpFixupArray array if malloc'ed storage was used.
+ */
+
+ done:
+ envPtr->currStackDepth = savedStackDepth + 1;
+ TclFreeJumpFixupArray(&jumpFalseFixupArray);
+ TclFreeJumpFixupArray(&jumpEndFixupArray);
+ return code;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileIncrCmd --
+ *
+ * Procedure called to compile the "incr" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "incr" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileIncrCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *varTokenPtr, *incrTokenPtr;
+ int simpleVarName, isScalar, localIndex, haveImmValue, immValue;
+ DefineLineInformation; /* TIP #280 */
+
+ if ((parsePtr->numWords != 2) && (parsePtr->numWords != 3)) {
+ return TCL_ERROR;
+ }
+
+ varTokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_LARGE_INDEX,
+ &localIndex, &simpleVarName, &isScalar, 1);
+
+ /*
+ * If an increment is given, push it, but see first if it's a small
+ * integer.
+ */
+
+ haveImmValue = 0;
+ immValue = 1;
+ if (parsePtr->numWords == 3) {
+ incrTokenPtr = TokenAfter(varTokenPtr);
+ if (incrTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
+ const char *word = incrTokenPtr[1].start;
+ int numBytes = incrTokenPtr[1].size;
+ int code;
+ Tcl_Obj *intObj = Tcl_NewStringObj(word, numBytes);
+
+ Tcl_IncrRefCount(intObj);
+ code = TclGetIntFromObj(NULL, intObj, &immValue);
+ TclDecrRefCount(intObj);
+ if ((code == TCL_OK) && (-127 <= immValue) && (immValue <= 127)) {
+ haveImmValue = 1;
+ }
+ if (!haveImmValue) {
+ PushLiteral(envPtr, word, numBytes);
+ }
+ } else {
+ SetLineInformation(2);
+ CompileTokens(envPtr, incrTokenPtr, interp);
+ }
+ } else { /* No incr amount given so use 1. */
+ haveImmValue = 1;
+ }
+
+ /*
+ * Emit the instruction to increment the variable.
+ */
+
+ if (!simpleVarName) {
+ if (haveImmValue) {
+ TclEmitInstInt1( INST_INCR_STK_IMM, immValue, envPtr);
+ } else {
+ TclEmitOpcode( INST_INCR_STK, envPtr);
+ }
+ } else if (isScalar) { /* Simple scalar variable. */
+ if (localIndex >= 0) {
+ if (haveImmValue) {
+ TclEmitInstInt1(INST_INCR_SCALAR1_IMM, localIndex, envPtr);
+ TclEmitInt1(immValue, envPtr);
+ } else {
+ TclEmitInstInt1(INST_INCR_SCALAR1, localIndex, envPtr);
+ }
+ } else {
+ if (haveImmValue) {
+ TclEmitInstInt1(INST_INCR_SCALAR_STK_IMM, immValue, envPtr);
+ } else {
+ TclEmitOpcode( INST_INCR_SCALAR_STK, envPtr);
+ }
+ }
+ } else { /* Simple array variable. */
+ if (localIndex >= 0) {
+ if (haveImmValue) {
+ TclEmitInstInt1(INST_INCR_ARRAY1_IMM, localIndex, envPtr);
+ TclEmitInt1(immValue, envPtr);
+ } else {
+ TclEmitInstInt1(INST_INCR_ARRAY1, localIndex, envPtr);
+ }
+ } else {
+ if (haveImmValue) {
+ TclEmitInstInt1(INST_INCR_ARRAY_STK_IMM, immValue, envPtr);
+ } else {
+ TclEmitOpcode( INST_INCR_ARRAY_STK, envPtr);
+ }
+ }
+ }
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileInfo*Cmd --
+ *
+ * Procedures called to compile "info" subcommands.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "info" subcommand at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileInfoCommandsCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr)
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr;
+ Tcl_Obj *objPtr;
+ char *bytes;
+
+ /*
+ * We require one compile-time known argument for the case we can compile.
+ */
+
+ if (parsePtr->numWords == 1) {
+ return TclCompileBasic0ArgCmd(interp, parsePtr, cmdPtr, envPtr);
+ } else if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+ tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ objPtr = Tcl_NewObj();
+ Tcl_IncrRefCount(objPtr);
+ if (!TclWordKnownAtCompileTime(tokenPtr, objPtr)) {
+ goto notCompilable;
+ }
+ bytes = Tcl_GetString(objPtr);
+
+ /*
+ * We require that the argument start with "::" and not have any of "*\[?"
+ * in it. (Theoretically, we should look in only the final component, but
+ * the difference is so slight given current naming practices.)
+ */
+
+ if (bytes[0] != ':' || bytes[1] != ':' || !TclMatchIsTrivial(bytes)) {
+ goto notCompilable;
+ }
+ Tcl_DecrRefCount(objPtr);
+
+ /*
+ * Confirmed as a literal that will not frighten the horses. Compile. Note
+ * that the result needs to be list-ified.
+ */
+
+ CompileWord(envPtr, tokenPtr, interp, 1);
+ TclEmitOpcode( INST_RESOLVE_COMMAND, envPtr);
+ TclEmitOpcode( INST_DUP, envPtr);
+ TclEmitOpcode( INST_STR_LEN, envPtr);
+ TclEmitInstInt1( INST_JUMP_FALSE1, 7, envPtr);
+ TclEmitInstInt4( INST_LIST, 1, envPtr);
+ return TCL_OK;
+
+ notCompilable:
+ Tcl_DecrRefCount(objPtr);
+ return TclCompileBasic1ArgCmd(interp, parsePtr, cmdPtr, envPtr);
+}
+
+int
+TclCompileInfoCoroutineCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ /*
+ * Only compile [info coroutine] without arguments.
+ */
+
+ if (parsePtr->numWords != 1) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Not much to do; we compile to a single instruction...
+ */
+
+ TclEmitOpcode( INST_COROUTINE_NAME, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileInfoExistsCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * 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) {
+ TclEmitOpcode( INST_EXIST_STK, envPtr);
+ } else 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);
+ }
+ }
+
+ return TCL_OK;
+}
+
+int
+TclCompileInfoLevelCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ /*
+ * Only compile [info level] without arguments or with a single argument.
+ */
+
+ if (parsePtr->numWords == 1) {
+ /*
+ * Not much to do; we compile to a single instruction...
+ */
+
+ TclEmitOpcode( INST_INFO_LEVEL_NUM, envPtr);
+ } else if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ } else {
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * Compile the argument, then add the instruction to convert it into a
+ * list of arguments.
+ */
+
+ SetLineInformation(1);
+ CompileTokens(envPtr, TokenAfter(parsePtr->tokenPtr), interp);
+ TclEmitOpcode( INST_INFO_LEVEL_ARGS, envPtr);
+ }
+ return TCL_OK;
+}
+
+int
+TclCompileInfoObjectClassCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr)
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+ CompileWord(envPtr, tokenPtr, interp, 1);
+ TclEmitOpcode( INST_TCLOO_CLASS, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileInfoObjectIsACmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr)
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ /*
+ * We only handle [info object isa object <somevalue>]. The first three
+ * words are compressed to a single token by the ensemble compilation
+ * engine.
+ */
+
+ if (parsePtr->numWords != 3) {
+ return TCL_ERROR;
+ }
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size < 1
+ || strncmp(tokenPtr[1].start, "object", tokenPtr[1].size)) {
+ return TCL_ERROR;
+ }
+ tokenPtr = TokenAfter(tokenPtr);
+
+ /*
+ * Issue the code.
+ */
+
+ CompileWord(envPtr, tokenPtr, interp, 2);
+ TclEmitOpcode( INST_TCLOO_IS_OBJECT, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileInfoObjectNamespaceCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr)
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+ CompileWord(envPtr, tokenPtr, interp, 1);
+ TclEmitOpcode( INST_TCLOO_NS, envPtr);
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLappendCmd --
+ *
+ * Procedure called to compile the "lappend" 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 "lappend" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLappendCmd(
+ 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 simpleVarName, isScalar, localIndex, numWords, i, fwd, offsetFwd;
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * If we're not in a procedure, don't compile.
+ */
+
+ if (envPtr->procPtr == NULL) {
+ return TCL_ERROR;
+ }
+
+ numWords = parsePtr->numWords;
+ if (numWords == 1) {
+ return TCL_ERROR;
+ }
+ if (numWords != 3) {
+ /*
+ * LAPPEND instructions currently only handle one value, but we can
+ * handle some multi-value cases by stringing them together.
+ */
+
+ goto lappendMultiple;
+ }
+
+ /*
+ * Decide if we can use a frame slot for the var/array name or if we
+ * need to emit code to compute and push the name at runtime. We use a
+ * frame slot (entry in the array of local vars) if we are compiling a
+ * procedure body and if the name is simple text that does not include
+ * namespace qualifiers.
+ */
+
+ varTokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ PushVarNameWord(interp, varTokenPtr, envPtr, 0,
+ &localIndex, &simpleVarName, &isScalar, 1);
+
+ /*
+ * If we are doing an assignment, push the new value. In the no values
+ * case, create an empty object.
+ */
+
+ if (numWords > 2) {
+ Tcl_Token *valueTokenPtr = TokenAfter(varTokenPtr);
+
+ CompileWord(envPtr, valueTokenPtr, interp, 2);
+ }
+
+ /*
+ * Emit instructions to set/get the variable.
+ */
+
+ /*
+ * The *_STK opcodes should be refactored to make better use of existing
+ * LOAD/STORE instructions.
+ */
+
+ if (!simpleVarName) {
+ TclEmitOpcode( INST_LAPPEND_STK, envPtr);
+ } else if (isScalar) {
+ if (localIndex < 0) {
+ TclEmitOpcode( INST_LAPPEND_STK, envPtr);
+ } else {
+ Emit14Inst( INST_LAPPEND_SCALAR, localIndex, envPtr);
+ }
+ } else {
+ if (localIndex < 0) {
+ TclEmitOpcode( INST_LAPPEND_ARRAY_STK, envPtr);
+ } else {
+ Emit14Inst( INST_LAPPEND_ARRAY, localIndex, envPtr);
+ }
+ }
+
+ return TCL_OK;
+
+ lappendMultiple:
+ /*
+ * Can only handle the case where we are appending to a local scalar when
+ * there are multiple values to append. Fortunately, this is common.
+ */
+
+ if (envPtr->procPtr == NULL) {
+ return TCL_ERROR;
+ }
+ varTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ PushVarNameWord(interp, varTokenPtr, envPtr, TCL_NO_ELEMENT,
+ &localIndex, &simpleVarName, &isScalar, 1);
+ if (!isScalar || localIndex < 0) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Definitely appending to a local scalar; generate the words and append
+ * them.
+ */
+
+ valueTokenPtr = TokenAfter(varTokenPtr);
+ for (i = 2 ; i < numWords ; i++) {
+ CompileWord(envPtr, valueTokenPtr, interp, i);
+ valueTokenPtr = TokenAfter(valueTokenPtr);
+ }
+ TclEmitInstInt4( INST_LIST, numWords-2, envPtr);
+ TclEmitInstInt4( INST_EXIST_SCALAR, localIndex, envPtr);
+ offsetFwd = CurrentOffset(envPtr);
+ TclEmitInstInt1( INST_JUMP_FALSE1, 0, envPtr);
+ Emit14Inst( INST_LOAD_SCALAR, localIndex, envPtr);
+ TclEmitInstInt4( INST_REVERSE, 2, envPtr);
+ TclEmitOpcode( INST_LIST_CONCAT, envPtr);
+ fwd = CurrentOffset(envPtr) - offsetFwd;
+ TclStoreInt1AtPtr(fwd, envPtr->codeStart+offsetFwd+1);
+ Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLassignCmd --
+ *
+ * Procedure called to compile the "lassign" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "lassign" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLassignCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *tokenPtr;
+ int simpleVarName, isScalar, localIndex, numWords, idx;
+ DefineLineInformation; /* TIP #280 */
+
+ numWords = parsePtr->numWords;
+
+ /*
+ * Check for command syntax error, but we'll punt that to runtime.
+ */
+
+ if (numWords < 3) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Generate code to push list being taken apart by [lassign].
+ */
+
+ tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ CompileWord(envPtr, tokenPtr, interp, 1);
+
+ /*
+ * Generate code to assign values from the list to variables.
+ */
+
+ for (idx=0 ; idx<numWords-2 ; idx++) {
+ tokenPtr = TokenAfter(tokenPtr);
+
+ /*
+ * Generate the next variable name.
+ */
+
+ PushVarNameWord(interp, tokenPtr, envPtr, 0, &localIndex,
+ &simpleVarName, &isScalar, idx+2);
+
+ /*
+ * Emit instructions to get the idx'th item out of the list value on
+ * the stack and assign it to the variable.
+ */
+
+ if (!simpleVarName) {
+ TclEmitInstInt4( INST_OVER, 1, envPtr);
+ TclEmitInstInt4( INST_LIST_INDEX_IMM, idx, envPtr);
+ TclEmitOpcode( INST_STORE_STK, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ } else if (isScalar) {
+ if (localIndex >= 0) {
+ TclEmitOpcode( INST_DUP, envPtr);
+ TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
+ Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ } else {
+ TclEmitInstInt4(INST_OVER, 1, envPtr);
+ TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
+ TclEmitOpcode( INST_STORE_SCALAR_STK, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ }
+ } else {
+ if (localIndex >= 0) {
+ TclEmitInstInt4(INST_OVER, 1, envPtr);
+ TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
+ Emit14Inst( INST_STORE_ARRAY, localIndex, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ } else {
+ TclEmitInstInt4(INST_OVER, 2, envPtr);
+ TclEmitInstInt4(INST_LIST_INDEX_IMM, idx, envPtr);
+ TclEmitOpcode( INST_STORE_ARRAY_STK, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ }
+ }
+ }
+
+ /*
+ * Generate code to leave the rest of the list on the stack.
+ */
+
+ TclEmitInstInt4( INST_LIST_RANGE_IMM, idx, envPtr);
+ TclEmitInt4( -2 /* == "end" */, envPtr);
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLindexCmd --
+ *
+ * Procedure called to compile the "lindex" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "lindex" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLindexCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *idxTokenPtr, *valTokenPtr;
+ int i, numWords = parsePtr->numWords;
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * Quit if too few args.
+ */
+
+ if (numWords <= 1) {
+ return TCL_ERROR;
+ }
+
+ valTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ if (numWords != 3) {
+ goto emitComplexLindex;
+ }
+
+ idxTokenPtr = TokenAfter(valTokenPtr);
+ if (idxTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
+ Tcl_Obj *tmpObj;
+ int idx, result;
+
+ tmpObj = Tcl_NewStringObj(idxTokenPtr[1].start, idxTokenPtr[1].size);
+ result = TclGetIntFromObj(NULL, tmpObj, &idx);
+ if (result == TCL_OK) {
+ if (idx < 0) {
+ result = TCL_ERROR;
+ }
+ } else {
+ result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx);
+ if (result == TCL_OK && idx > -2) {
+ result = TCL_ERROR;
+ }
+ }
+ TclDecrRefCount(tmpObj);
+
+ if (result == TCL_OK) {
+ /*
+ * All checks have been completed, and we have exactly one of
+ * these constructs:
+ * lindex <arbitraryValue> <posInt>
+ * lindex <arbitraryValue> end-<posInt>
+ * This is best compiled as a push of the arbitrary value followed
+ * by an "immediate lindex" which is the most efficient variety.
+ */
+
+ CompileWord(envPtr, valTokenPtr, interp, 1);
+ TclEmitInstInt4( INST_LIST_INDEX_IMM, idx, envPtr);
+ return TCL_OK;
+ }
+
+ /*
+ * If the conversion failed or the value was negative, we just keep on
+ * going with the more complex compilation.
+ */
+ }
+
+ /*
+ * Push the operands onto the stack.
+ */
+
+ emitComplexLindex:
+ for (i=1 ; i<numWords ; i++) {
+ CompileWord(envPtr, valTokenPtr, interp, i);
+ valTokenPtr = TokenAfter(valTokenPtr);
+ }
+
+ /*
+ * Emit INST_LIST_INDEX if objc==3, or INST_LIST_INDEX_MULTI if there are
+ * multiple index args.
+ */
+
+ if (numWords == 3) {
+ TclEmitOpcode( INST_LIST_INDEX, envPtr);
+ } else {
+ TclEmitInstInt4( INST_LIST_INDEX_MULTI, numWords-1, envPtr);
+ }
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileListCmd --
+ *
+ * Procedure called to compile the "list" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "list" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileListCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *valueTokenPtr;
+ int i, numWords, concat, build;
+ Tcl_Obj *listObj, *objPtr;
+
+ if (parsePtr->numWords == 1) {
+ /*
+ * [list] without arguments just pushes an empty object.
+ */
+
+ PushLiteral(envPtr, "", 0);
+ return TCL_OK;
+ }
+
+ /*
+ * Test if all arguments are compile-time known. If they are, we can
+ * implement with a simple push.
+ */
+
+ numWords = parsePtr->numWords;
+ valueTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ listObj = Tcl_NewObj();
+ for (i = 1; i < numWords && listObj != NULL; i++) {
+ objPtr = Tcl_NewObj();
+ if (TclWordKnownAtCompileTime(valueTokenPtr, objPtr)) {
+ (void) Tcl_ListObjAppendElement(NULL, listObj, objPtr);
+ } else {
+ Tcl_DecrRefCount(objPtr);
+ Tcl_DecrRefCount(listObj);
+ listObj = NULL;
+ }
+ valueTokenPtr = TokenAfter(valueTokenPtr);
+ }
+ if (listObj != NULL) {
+ int len;
+ const char *bytes = Tcl_GetStringFromObj(listObj, &len);
+
+ PushLiteral(envPtr, bytes, len);
+ Tcl_DecrRefCount(listObj);
+ if (len > 0) {
+ /*
+ * Force list interpretation!
+ */
+
+ TclEmitOpcode( INST_DUP, envPtr);
+ TclEmitOpcode( INST_LIST_LENGTH, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ }
+ return TCL_OK;
+ }
+
+ /*
+ * Push the all values onto the stack.
+ */
+
+ numWords = parsePtr->numWords;
+ valueTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ concat = build = 0;
+ for (i = 1; i < numWords; i++) {
+ if (valueTokenPtr->type == TCL_TOKEN_EXPAND_WORD && build > 0) {
+ TclEmitInstInt4( INST_LIST, build, envPtr);
+ if (concat) {
+ TclEmitOpcode( INST_LIST_CONCAT, envPtr);
+ }
+ build = 0;
+ concat = 1;
+ }
+ CompileWord(envPtr, valueTokenPtr, interp, i);
+ if (valueTokenPtr->type == TCL_TOKEN_EXPAND_WORD) {
+ if (concat) {
+ TclEmitOpcode( INST_LIST_CONCAT, envPtr);
+ } else {
+ concat = 1;
+ }
+ } else {
+ build++;
+ }
+ valueTokenPtr = TokenAfter(valueTokenPtr);
+ }
+ if (build > 0) {
+ TclEmitInstInt4( INST_LIST, build, envPtr);
+ if (concat) {
+ TclEmitOpcode( INST_LIST_CONCAT, envPtr);
+ }
+ }
+
+ /*
+ * If there was just one expanded word, we must ensure that it is a list
+ * at this point. We use an [lrange ... 0 end] for this (instead of
+ * [llength], as with literals) as we must drop any string representation
+ * that might be hanging around.
+ */
+
+ if (concat && numWords == 2) {
+ TclEmitInstInt4( INST_LIST_RANGE_IMM, 0, envPtr);
+ TclEmitInt4( -2, envPtr);
+ }
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLlengthCmd --
+ *
+ * Procedure called to compile the "llength" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "llength" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLlengthCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *varTokenPtr;
+ DefineLineInformation; /* TIP #280 */
+
+ if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+ varTokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ CompileWord(envPtr, varTokenPtr, interp, 1);
+ TclEmitOpcode( INST_LIST_LENGTH, envPtr);
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLrangeCmd --
+ *
+ * How to compile the "lrange" command. We only bother because we needed
+ * the opcode anyway for "lassign".
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLrangeCmd(
+ Tcl_Interp *interp, /* Tcl interpreter for context. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the
+ * command. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds the resulting instructions. */
+{
+ Tcl_Token *tokenPtr, *listTokenPtr;
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Obj *tmpObj;
+ int idx1, idx2, result;
+
+ if (parsePtr->numWords != 4) {
+ return TCL_ERROR;
+ }
+ listTokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ /*
+ * Parse the first index. Will only compile if it is constant and not an
+ * _integer_ less than zero (since we reserve negative indices here for
+ * end-relative indexing).
+ */
+
+ tokenPtr = TokenAfter(listTokenPtr);
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ return TCL_ERROR;
+ }
+ tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
+ result = TclGetIntFromObj(NULL, tmpObj, &idx1);
+ if (result == TCL_OK) {
+ if (idx1 < 0) {
+ result = TCL_ERROR;
+ }
+ } else {
+ result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx1);
+ if (result == TCL_OK && idx1 > -2) {
+ result = TCL_ERROR;
+ }
+ }
+ TclDecrRefCount(tmpObj);
+ if (result != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Parse the second index. Will only compile if it is constant and not an
+ * _integer_ less than zero (since we reserve negative indices here for
+ * end-relative indexing).
+ */
+
+ tokenPtr = TokenAfter(tokenPtr);
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ return TCL_ERROR;
+ }
+ tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
+ result = TclGetIntFromObj(NULL, tmpObj, &idx2);
+ if (result == TCL_OK) {
+ if (idx2 < 0) {
+ result = TCL_ERROR;
+ }
+ } else {
+ result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx2);
+ if (result == TCL_OK && idx2 > -2) {
+ result = TCL_ERROR;
+ }
+ }
+ TclDecrRefCount(tmpObj);
+ if (result != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Issue instructions. It's not safe to skip doing the LIST_RANGE, as
+ * we've not proved that the 'list' argument is really a list. Not that it
+ * is worth trying to do that given current knowledge.
+ */
+
+ CompileWord(envPtr, listTokenPtr, interp, 1);
+ TclEmitInstInt4( INST_LIST_RANGE_IMM, idx1, envPtr);
+ TclEmitInt4( idx2, envPtr);
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLreplaceCmd --
+ *
+ * How to compile the "lreplace" command. We only bother with the case
+ * where there are no elements to insert and where both the 'first' and
+ * 'last' arguments are constant and one can be deterined to be at the
+ * end of the list. (This is the case that could also be written with
+ * "lrange".)
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLreplaceCmd(
+ Tcl_Interp *interp, /* Tcl interpreter for context. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the
+ * command. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds the resulting instructions. */
+{
+ Tcl_Token *tokenPtr, *listTokenPtr;
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Obj *tmpObj;
+ int idx1, idx2, result, guaranteedDropAll = 0;
+
+ if (parsePtr->numWords != 4) {
+ return TCL_ERROR;
+ }
+ listTokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ /*
+ * Parse the first index. Will only compile if it is constant and not an
+ * _integer_ less than zero (since we reserve negative indices here for
+ * end-relative indexing).
+ */
+
+ tokenPtr = TokenAfter(listTokenPtr);
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ return TCL_ERROR;
+ }
+ tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
+ result = TclGetIntFromObj(NULL, tmpObj, &idx1);
+ if (result == TCL_OK) {
+ if (idx1 < 0) {
+ result = TCL_ERROR;
+ }
+ } else {
+ result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx1);
+ if (result == TCL_OK && idx1 > -2) {
+ result = TCL_ERROR;
+ }
+ }
+ TclDecrRefCount(tmpObj);
+ if (result != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Parse the second index. Will only compile if it is constant and not an
+ * _integer_ less than zero (since we reserve negative indices here for
+ * end-relative indexing).
+ */
+
+ tokenPtr = TokenAfter(tokenPtr);
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ return TCL_ERROR;
+ }
+ tmpObj = Tcl_NewStringObj(tokenPtr[1].start, tokenPtr[1].size);
+ result = TclGetIntFromObj(NULL, tmpObj, &idx2);
+ if (result == TCL_OK) {
+ if (idx2 < 0) {
+ result = TCL_ERROR;
+ }
+ } else {
+ result = TclGetIntForIndexM(NULL, tmpObj, -2, &idx2);
+ if (result == TCL_OK && idx2 > -2) {
+ result = TCL_ERROR;
+ }
+ }
+ TclDecrRefCount(tmpObj);
+ if (result != TCL_OK) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Sanity check: can only issue when we're removing a range at one or
+ * other end of the list. If we're at one end or the other, convert the
+ * indices into the equivalent for an [lrange].
+ */
+
+ if (idx1 == 0) {
+ if (idx2 == -2) {
+ guaranteedDropAll = 1;
+ }
+ idx1 = idx2 + 1;
+ idx2 = -2;
+ } else if (idx2 == -2) {
+ idx2 = idx1 - 1;
+ idx1 = 0;
+ } else {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Issue instructions. It's not safe to skip doing the LIST_RANGE, as
+ * we've not proved that the 'list' argument is really a list. Not that it
+ * is worth trying to do that given current knowledge.
+ */
+
+ CompileWord(envPtr, listTokenPtr, interp, 1);
+ if (guaranteedDropAll) {
+ TclEmitOpcode( INST_LIST_LENGTH, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ PushLiteral(envPtr, "", 0);
+ } else {
+ TclEmitInstInt4( INST_LIST_RANGE_IMM, idx1, envPtr);
+ TclEmitInt4( idx2, envPtr);
+ }
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileLsetCmd --
+ *
+ * Procedure called to compile the "lset" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "lset" command at
+ * runtime.
+ *
+ * The general template for execution of the "lset" command is:
+ * (1) Instructions to push the variable name, unless the variable is
+ * local to the stack frame.
+ * (2) If the variable is an array element, instructions to push the
+ * array element name.
+ * (3) Instructions to push each of zero or more "index" arguments to the
+ * stack, followed with the "newValue" element.
+ * (4) Instructions to duplicate the variable name and/or array element
+ * name onto the top of the stack, if either was pushed at steps (1)
+ * and (2).
+ * (5) The appropriate INST_LOAD_* instruction to place the original
+ * value of the list variable at top of stack.
+ * (6) At this point, the stack contains:
+ * varName? arrayElementName? index1 index2 ... newValue oldList
+ * The compiler emits one of INST_LSET_FLAT or INST_LSET_LIST
+ * according as whether there is exactly one index element (LIST) or
+ * either zero or else two or more (FLAT). This instruction removes
+ * everything from the stack except for the two names and pushes the
+ * new value of the variable.
+ * (7) Finally, INST_STORE_* stores the new value in the variable and
+ * cleans up the stack.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileLsetCmd(
+ Tcl_Interp *interp, /* Tcl interpreter for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the
+ * command. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds the resulting instructions. */
+{
+ int tempDepth; /* Depth used for emitting one part of the
+ * code burst. */
+ Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing the
+ * parse of the variable name. */
+ int localIndex; /* Index of var in local var table. */
+ int simpleVarName; /* Flag == 1 if var name is simple. */
+ int isScalar; /* Flag == 1 if scalar, 0 if array. */
+ int i;
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * Check argument count.
+ */
+
+ if (parsePtr->numWords < 3) {
+ /*
+ * Fail at run time, not in compilation.
+ */
+
+ return TCL_ERROR;
+ }
+
+ /*
+ * Decide if we can use a frame slot for the var/array name or if we need
+ * to emit code to compute and push the name at runtime. We use a frame
+ * slot (entry in the array of local vars) if we are compiling a procedure
+ * body and if the name is simple text that does not include namespace
+ * qualifiers.
+ */
+
+ varTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ PushVarNameWord(interp, varTokenPtr, envPtr, 0,
+ &localIndex, &simpleVarName, &isScalar, 1);
+
+ /*
+ * Push the "index" args and the new element value.
+ */
+
+ for (i=2 ; i<parsePtr->numWords ; ++i) {
+ varTokenPtr = TokenAfter(varTokenPtr);
+ CompileWord(envPtr, varTokenPtr, interp, i);
+ }
+
+ /*
+ * Duplicate the variable name if it's been pushed.
+ */
+
+ if (!simpleVarName || localIndex < 0) {
+ if (!simpleVarName || isScalar) {
+ tempDepth = parsePtr->numWords - 2;
+ } else {
+ tempDepth = parsePtr->numWords - 1;
+ }
+ TclEmitInstInt4( INST_OVER, tempDepth, envPtr);
+ }
+
+ /*
+ * Duplicate an array index if one's been pushed.
+ */
+
+ if (simpleVarName && !isScalar) {
+ if (localIndex < 0) {
+ tempDepth = parsePtr->numWords - 1;
+ } else {
+ tempDepth = parsePtr->numWords - 2;
+ }
+ TclEmitInstInt4( INST_OVER, tempDepth, envPtr);
+ }
+
+ /*
+ * Emit code to load the variable's value.
+ */
+
+ if (!simpleVarName) {
+ TclEmitOpcode( INST_LOAD_STK, envPtr);
+ } else if (isScalar) {
+ if (localIndex < 0) {
+ TclEmitOpcode( INST_LOAD_SCALAR_STK, envPtr);
+ } else {
+ Emit14Inst( INST_LOAD_SCALAR, localIndex, envPtr);
+ }
+ } else {
+ if (localIndex < 0) {
+ TclEmitOpcode( INST_LOAD_ARRAY_STK, envPtr);
+ } else {
+ Emit14Inst( INST_LOAD_ARRAY, localIndex, envPtr);
+ }
+ }
+
+ /*
+ * Emit the correct variety of 'lset' instruction.
+ */
+
+ if (parsePtr->numWords == 4) {
+ TclEmitOpcode( INST_LSET_LIST, envPtr);
+ } else {
+ TclEmitInstInt4( INST_LSET_FLAT, parsePtr->numWords-1, envPtr);
+ }
+
+ /*
+ * Emit code to put the value back in the variable.
+ */
+
+ if (!simpleVarName) {
+ TclEmitOpcode( INST_STORE_STK, envPtr);
+ } else if (isScalar) {
+ if (localIndex < 0) {
+ TclEmitOpcode( INST_STORE_SCALAR_STK, envPtr);
+ } else {
+ Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
+ }
+ } else {
+ if (localIndex < 0) {
+ TclEmitOpcode( INST_STORE_ARRAY_STK, envPtr);
+ } else {
+ Emit14Inst( INST_STORE_ARRAY, localIndex, envPtr);
+ }
+ }
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileNamespace*Cmd --
+ *
+ * Procedures called to compile the "namespace" command; currently, only
+ * the subcommands "namespace current" and "namespace upvar" are compiled
+ * to bytecodes, and the latter only inside a procedure(-like) context.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "namespace upvar"
+ * command at runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileNamespaceCurrentCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ /*
+ * Only compile [namespace current] without arguments.
+ */
+
+ if (parsePtr->numWords != 1) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Not much to do; we compile to a single instruction...
+ */
+
+ TclEmitOpcode( INST_NS_CURRENT, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileNamespaceCodeCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *tokenPtr;
+ DefineLineInformation; /* TIP #280 */
+
+ if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+ tokenPtr = TokenAfter(parsePtr->tokenPtr);
+
+ /*
+ * The specification of [namespace code] is rather shocking, in that it is
+ * supposed to check if the argument is itself the result of [namespace
+ * code] and not apply itself in that case. Which is excessively cautious,
+ * but what the test suite checks for.
+ */
+
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || (tokenPtr[1].size > 20
+ && strncmp(tokenPtr[1].start, "::namespace inscope ", 20) == 0)) {
+ /*
+ * Technically, we could just pass a literal '::namespace inscope '
+ * term through, but that's something which really shouldn't be
+ * occurring as something that the user writes so we'll just punt it.
+ */
+
+ return TCL_ERROR;
+ }
+
+ /*
+ * Now we can compile using the same strategy as [namespace code]'s normal
+ * implementation does internally. Note that we can't bind the namespace
+ * name directly here, because TclOO plays complex games with namespaces;
+ * the value needs to be determined at runtime for safety.
+ */
+
+ PushLiteral(envPtr, "::namespace", 11);
+ PushLiteral(envPtr, "inscope", 7);
+ TclEmitOpcode( INST_NS_CURRENT, envPtr);
+ CompileWord(envPtr, tokenPtr, interp, 1);
+ TclEmitInstInt4( INST_LIST, 4, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileNamespaceQualifiersCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ DefineLineInformation; /* TIP #280 */
+ int off;
+
+ if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+
+ CompileWord(envPtr, tokenPtr, interp, 1);
+ PushLiteral(envPtr, "0", 1);
+ PushLiteral(envPtr, "::", 2);
+ TclEmitInstInt4( INST_OVER, 2, envPtr);
+ TclEmitOpcode( INST_STR_FIND_LAST, envPtr);
+ off = CurrentOffset(envPtr);
+ PushLiteral(envPtr, "1", 1);
+ TclEmitOpcode( INST_SUB, envPtr);
+ TclEmitInstInt4( INST_OVER, 2, envPtr);
+ TclEmitInstInt4( INST_OVER, 1, envPtr);
+ TclEmitOpcode( INST_STR_INDEX, envPtr);
+ PushLiteral(envPtr, ":", 1);
+ TclEmitOpcode( INST_STR_EQ, envPtr);
+ off = off - CurrentOffset(envPtr);
+ TclEmitInstInt1( INST_JUMP_TRUE1, off, envPtr);
+ TclEmitOpcode( INST_STR_RANGE, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileNamespaceTailCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ DefineLineInformation; /* TIP #280 */
+ JumpFixup jumpFixup;
+
+ if (parsePtr->numWords != 2) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Take care; only add 2 to found index if the string was actually found.
+ */
+
+ CompileWord(envPtr, tokenPtr, interp, 1);
+ PushLiteral(envPtr, "::", 2);
+ TclEmitInstInt4( INST_OVER, 1, envPtr);
+ TclEmitOpcode( INST_STR_FIND_LAST, envPtr);
+ TclEmitOpcode( INST_DUP, envPtr);
+ PushLiteral(envPtr, "0", 1);
+ TclEmitOpcode( INST_GE, envPtr);
+ TclEmitForwardJump(envPtr, TCL_FALSE_JUMP, &jumpFixup);
+ PushLiteral(envPtr, "2", 1);
+ TclEmitOpcode( INST_ADD, envPtr);
+ TclFixupForwardJumpToHere(envPtr, &jumpFixup, 127);
+ PushLiteral(envPtr, "end", 3);
+ TclEmitOpcode( INST_STR_RANGE, envPtr);
+ return TCL_OK;
+}
+
+int
+TclCompileNamespaceUpvarCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * 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;
+}
+
+int
+TclCompileNamespaceWhichCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr, *opt;
+ int idx;
+
+ if (parsePtr->numWords < 2 || parsePtr->numWords > 3) {
+ return TCL_ERROR;
+ }
+ tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ idx = 1;
+
+ /*
+ * If there's an option, check that it's "-command". We don't handle
+ * "-variable" (currently) and anything else is an error.
+ */
+
+ if (parsePtr->numWords == 3) {
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ return TCL_ERROR;
+ }
+ opt = tokenPtr + 1;
+ if (opt->size < 2 || opt->size > 8
+ || strncmp(opt->start, "-command", opt->size) != 0) {
+ return TCL_ERROR;
+ }
+ tokenPtr = TokenAfter(tokenPtr);
+ idx++;
+ }
+
+ /*
+ * Issue the bytecode.
+ */
+
+ CompileWord(envPtr, tokenPtr, interp, idx);
+ TclEmitOpcode( INST_RESOLVE_COMMAND, envPtr);
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileRegexpCmd --
+ *
+ * Procedure called to compile the "regexp" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "regexp" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileRegexpCmd(
+ Tcl_Interp *interp, /* Tcl interpreter for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the
+ * command. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds the resulting instructions. */
+{
+ Tcl_Token *varTokenPtr; /* Pointer to the Tcl_Token representing the
+ * parse of the RE or string. */
+ int i, len, nocase, exact, sawLast, simple;
+ const char *str;
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * We are only interested in compiling simple regexp cases. Currently
+ * supported compile cases are:
+ * regexp ?-nocase? ?--? staticString $var
+ * regexp ?-nocase? ?--? {^staticString$} $var
+ */
+
+ if (parsePtr->numWords < 3) {
+ return TCL_ERROR;
+ }
+
+ simple = 0;
+ nocase = 0;
+ sawLast = 0;
+ varTokenPtr = parsePtr->tokenPtr;
+
+ /*
+ * We only look for -nocase and -- as options. Everything else gets pushed
+ * to runtime execution. This is different than regexp's runtime option
+ * handling, but satisfies our stricter needs.
+ */
+
+ for (i = 1; i < parsePtr->numWords - 2; i++) {
+ varTokenPtr = TokenAfter(varTokenPtr);
+ if (varTokenPtr->type != TCL_TOKEN_SIMPLE_WORD) {
+ /*
+ * Not a simple string, so punt to runtime.
+ */
+
+ return TCL_ERROR;
+ }
+ str = varTokenPtr[1].start;
+ len = varTokenPtr[1].size;
+ if ((len == 2) && (str[0] == '-') && (str[1] == '-')) {
+ sawLast++;
+ i++;
+ break;
+ } else if ((len > 1) && (strncmp(str,"-nocase",(unsigned)len) == 0)) {
+ nocase = 1;
+ } else {
+ /*
+ * Not an option we recognize.
+ */
+
+ return TCL_ERROR;
+ }
+ }
+
+ if ((parsePtr->numWords - i) != 2) {
+ /*
+ * We don't support capturing to variables.
+ */
+
+ return TCL_ERROR;
+ }
+
+ /*
+ * Get the regexp string. If it is not a simple string or can't be
+ * converted to a glob pattern, push the word for the INST_REGEXP.
+ * Keep changes here in sync with TclCompileSwitchCmd Switch_Regexp.
+ */
+
+ varTokenPtr = TokenAfter(varTokenPtr);
+
+ if (varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) {
+ Tcl_DString ds;
+
+ str = varTokenPtr[1].start;
+ len = varTokenPtr[1].size;
+
+ /*
+ * If it has a '-', it could be an incorrectly formed regexp command.
+ */
+
+ if ((*str == '-') && !sawLast) {
+ return TCL_ERROR;
+ }
+
+ if (len == 0) {
+ /*
+ * The semantics of regexp are always match on re == "".
+ */
+
+ PushLiteral(envPtr, "1", 1);
+ return TCL_OK;
+ }
+
+ /*
+ * Attempt to convert pattern to glob. If successful, push the
+ * converted pattern as a literal.
+ */
+
+ if (TclReToGlob(NULL, varTokenPtr[1].start, len, &ds, &exact)
+ == TCL_OK) {
+ simple = 1;
+ PushLiteral(envPtr, Tcl_DStringValue(&ds),Tcl_DStringLength(&ds));
+ Tcl_DStringFree(&ds);
+ }
+ }
+
+ if (!simple) {
+ CompileWord(envPtr, varTokenPtr, interp, parsePtr->numWords-2);
+ }
+
+ /*
+ * Push the string arg.
+ */
+
+ varTokenPtr = TokenAfter(varTokenPtr);
+ CompileWord(envPtr, varTokenPtr, interp, parsePtr->numWords-1);
+
+ if (simple) {
+ if (exact && !nocase) {
+ TclEmitOpcode( INST_STR_EQ, envPtr);
+ } else {
+ TclEmitInstInt1( INST_STR_MATCH, nocase, envPtr);
+ }
+ } else {
+ /*
+ * Pass correct RE compile flags. We use only Int1 (8-bit), but
+ * that handles all the flags we want to pass.
+ * Don't use TCL_REG_NOSUB as we may have backrefs.
+ */
+
+ int cflags = TCL_REG_ADVANCED | (nocase ? TCL_REG_NOCASE : 0);
+
+ TclEmitInstInt1( INST_REGEXP, cflags, envPtr);
+ }
+
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileRegsubCmd --
+ *
+ * Procedure called to compile the "regsub" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "regsub" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileRegsubCmd(
+ Tcl_Interp *interp, /* Tcl interpreter for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the
+ * command. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds the resulting instructions. */
+{
+ /*
+ * We only compile the case with [regsub -all] where the pattern is both
+ * known at compile time and simple (i.e., no RE metacharacters). That is,
+ * the pattern must be translatable into a glob like "*foo*" with no other
+ * glob metacharacters inside it; there must be some "foo" in there too.
+ * The substitution string must also be known at compile time and free of
+ * metacharacters ("\digit" and "&"). Finally, there must not be a
+ * variable mentioned in the [regsub] to write the result back to (because
+ * we can't get the count of substitutions that would be the result in
+ * that case). The key is that these are the conditions under which a
+ * [string map] could be used instead, in particular a [string map] of the
+ * form we can compile to bytecode.
+ *
+ * In short, we look for:
+ *
+ * regsub -all [--] simpleRE string simpleReplacement
+ *
+ * The only optional part is the "--", and no other options are handled.
+ */
+
+ DefineLineInformation; /* TIP #280 */
+ Tcl_Token *tokenPtr, *stringTokenPtr;
+ Tcl_Obj *patternObj = NULL, *replacementObj = NULL;
+ Tcl_DString pattern;
+ const char *bytes;
+ int len, exact, result = TCL_ERROR;
+
+ if (parsePtr->numWords < 5 || parsePtr->numWords > 6) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Parse the "-all", which must be the first argument (other options not
+ * supported, non-"-all" substitution we can't compile).
+ */
+
+ tokenPtr = TokenAfter(parsePtr->tokenPtr);
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size != 4
+ || strncmp(tokenPtr[1].start, "-all", 4)) {
+ return TCL_ERROR;
+ }
+
+ /*
+ * Get the pattern into patternObj, checking for "--" in the process.
+ */
+
+ Tcl_DStringInit(&pattern);
+ tokenPtr = TokenAfter(tokenPtr);
+ patternObj = Tcl_NewObj();
+ if (!TclWordKnownAtCompileTime(tokenPtr, patternObj)) {
+ goto done;
+ }
+ if (Tcl_GetString(patternObj)[0] == '-') {
+ if (strcmp(Tcl_GetString(patternObj), "--") != 0
+ || parsePtr->numWords == 5) {
+ goto done;
+ }
+ tokenPtr = TokenAfter(tokenPtr);
+ Tcl_DecrRefCount(patternObj);
+ patternObj = Tcl_NewObj();
+ if (!TclWordKnownAtCompileTime(tokenPtr, patternObj)) {
+ goto done;
+ }
+ } else if (parsePtr->numWords == 6) {
+ goto done;
+ }
+
+ /*
+ * Identify the code which produces the string to apply the substitution
+ * to (stringTokenPtr), and the replacement string (into replacementObj).
+ */
+
+ stringTokenPtr = TokenAfter(tokenPtr);
+ tokenPtr = TokenAfter(stringTokenPtr);
+ replacementObj = Tcl_NewObj();
+ if (!TclWordKnownAtCompileTime(tokenPtr, replacementObj)) {
+ goto done;
+ }
+
+ /*
+ * Next, higher-level checks. Is the RE a very simple glob? Is the
+ * replacement "simple"?
+ */
+
+ bytes = Tcl_GetStringFromObj(patternObj, &len);
+ if (TclReToGlob(NULL, bytes, len, &pattern, &exact) != TCL_OK || exact) {
+ goto done;
+ }
+ bytes = Tcl_DStringValue(&pattern);
+ if (*bytes++ != '*') {
+ goto done;
+ }
+ while (1) {
+ switch (*bytes) {
+ case '*':
+ if (bytes[1] == '\0') {
+ /*
+ * OK, we've proved there are no metacharacters except for the
+ * '*' at each end.
+ */
+
+ len = Tcl_DStringLength(&pattern) - 2;
+ if (len > 0) {
+ goto isSimpleGlob;
+ }
+
+ /*
+ * The pattern is "**"! I believe that should be impossible,
+ * but we definitely can't handle that at all.
+ */
+ }
+ case '\0': case '?': case '[': case '\\':
+ goto done;
+ }
+ bytes++;
+ }
+ isSimpleGlob:
+ for (bytes = Tcl_GetString(replacementObj); *bytes; bytes++) {
+ switch (*bytes) {
+ case '\\': case '&':
+ goto done;
+ }
+ }
+
+ /*
+ * Proved the simplicity constraints! Time to issue the code.
+ */
+
+ result = TCL_OK;
+ bytes = Tcl_DStringValue(&pattern) + 1;
+ PushLiteral(envPtr, bytes, len);
+ bytes = Tcl_GetStringFromObj(replacementObj, &len);
+ PushLiteral(envPtr, bytes, len);
+ CompileWord(envPtr, stringTokenPtr, interp, parsePtr->numWords-2);
+ TclEmitOpcode( INST_STR_MAP, envPtr);
+
+ done:
+ Tcl_DStringFree(&pattern);
+ if (patternObj) {
+ Tcl_DecrRefCount(patternObj);
+ }
+ if (replacementObj) {
+ Tcl_DecrRefCount(replacementObj);
+ }
+ return result;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclCompileReturnCmd --
+ *
+ * Procedure called to compile the "return" command.
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "return" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclCompileReturnCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ /*
+ * General syntax: [return ?-option value ...? ?result?]
+ * An even number of words means an explicit result argument is present.
+ */
+ int level, code, objc, size, status = TCL_OK;
+ int numWords = parsePtr->numWords;
+ int explicitResult = (0 == (numWords % 2));
+ int numOptionWords = numWords - 1 - explicitResult;
+ int savedStackDepth = envPtr->currStackDepth;
+ Tcl_Obj *returnOpts, **objv;
+ Tcl_Token *wordTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ DefineLineInformation; /* TIP #280 */
+
+ /*
+ * Check for special case which can always be compiled:
+ * return -options <opts> <msg>
+ * Unlike the normal [return] compilation, this version does everything at
+ * runtime so it can handle arbitrary words and not just literals. Note
+ * that if INST_RETURN_STK wasn't already needed for something else
+ * ('finally' clause processing) this piece of code would not be present.
+ */
+
+ if ((numWords == 4) && (wordTokenPtr->type == TCL_TOKEN_SIMPLE_WORD)
+ && (wordTokenPtr[1].size == 8)
+ && (strncmp(wordTokenPtr[1].start, "-options", 8) == 0)) {
+ Tcl_Token *optsTokenPtr = TokenAfter(wordTokenPtr);
+ Tcl_Token *msgTokenPtr = TokenAfter(optsTokenPtr);
+
+ CompileWord(envPtr, optsTokenPtr, interp, 2);
+ CompileWord(envPtr, msgTokenPtr, interp, 3);
+ TclEmitOpcode(INST_RETURN_STK, envPtr);
+ envPtr->currStackDepth = savedStackDepth + 1;
+ return TCL_OK;
+ }
+
+ /*
+ * Allocate some working space.
+ */
+
+ objv = TclStackAlloc(interp, numOptionWords * sizeof(Tcl_Obj *));
+
+ /*
+ * Scan through the return options. If any are unknown at compile time,
+ * there is no value in bytecompiling. Save the option values known in an
+ * objv array for merging into a return options dictionary.
+ */
+
+ for (objc = 0; objc < numOptionWords; objc++) {
+ objv[objc] = Tcl_NewObj();
+ Tcl_IncrRefCount(objv[objc]);
+ if (!TclWordKnownAtCompileTime(wordTokenPtr, objv[objc])) {
+ /*
+ * Non-literal, so punt to run-time.
+ */
+
+ for (; objc>=0 ; objc--) {
+ TclDecrRefCount(objv[objc]);
+ }
+ TclStackFree(interp, objv);
+ goto issueRuntimeReturn;
+ }
+ wordTokenPtr = TokenAfter(wordTokenPtr);
+ }
+ status = TclMergeReturnOptions(interp, objc, objv,
+ &returnOpts, &code, &level);
+ while (--objc >= 0) {
+ TclDecrRefCount(objv[objc]);
+ }
+ TclStackFree(interp, objv);
+ if (TCL_ERROR == status) {
+ /*
+ * Something was bogus in the return options. Clear the error message,
+ * and report back to the compiler that this must be interpreted at
+ * runtime.
+ */
+
+ Tcl_ResetResult(interp);
+ return TCL_ERROR;
+ }
+
+ /*
+ * All options are known at compile time, so we're going to bytecompile.
+ * Emit instructions to push the result on the stack.
+ */
+
+ if (explicitResult) {
+ CompileWord(envPtr, wordTokenPtr, interp, numWords-1);
+ } else {
+ /*
+ * No explict result argument, so default result is empty string.
+ */
+
+ PushLiteral(envPtr, "", 0);
+ }
+
+ /*
+ * Check for optimization: When [return] is in a proc, and there's no
+ * enclosing [catch], and there are no return options, then the INST_DONE
+ * instruction is equivalent, and may be more efficient.
+ */
+
+ if (numOptionWords == 0 && envPtr->procPtr != NULL) {
+ /*
+ * We have default return options and we're in a proc ...
+ */
+
+ int index = envPtr->exceptArrayNext - 1;
+ int enclosingCatch = 0;
+
+ while (index >= 0) {
+ ExceptionRange range = envPtr->exceptArrayPtr[index];
+
+ if ((range.type == CATCH_EXCEPTION_RANGE)
+ && (range.catchOffset == -1)) {
+ enclosingCatch = 1;
+ break;
+ }
+ index--;
+ }
+ if (!enclosingCatch) {
+ /*
+ * ... and there is no enclosing catch. Issue the maximally
+ * efficient exit instruction.
+ */
+
+ Tcl_DecrRefCount(returnOpts);
+ TclEmitOpcode(INST_DONE, envPtr);
+ envPtr->currStackDepth = savedStackDepth;
+ return TCL_OK;
+ }
+ }
+
+ /* Optimize [return -level 0 $x]. */
+ Tcl_DictObjSize(NULL, returnOpts, &size);
+ if (size == 0 && level == 0 && code == TCL_OK) {
+ Tcl_DecrRefCount(returnOpts);
+ return TCL_OK;
+ }
+
+ /*
+ * Could not use the optimization, so we push the return options dict, and
+ * emit the INST_RETURN_IMM instruction with code and level as operands.
+ */
+
+ CompileReturnInternal(envPtr, INST_RETURN_IMM, code, level, returnOpts);
+ envPtr->currStackDepth = savedStackDepth + 1;
+ return TCL_OK;
+
+ issueRuntimeReturn:
+ /*
+ * Assemble the option dictionary (as a list as that's good enough).
+ */
+
+ wordTokenPtr = TokenAfter(parsePtr->tokenPtr);
+ for (objc=1 ; objc<=numOptionWords ; objc++) {
+ CompileWord(envPtr, wordTokenPtr, interp, objc);
+ wordTokenPtr = TokenAfter(wordTokenPtr);
+ }
+ TclEmitInstInt4(INST_LIST, numOptionWords, envPtr);
+
+ /*
+ * Push the result.
+ */
+
+ if (explicitResult) {
+ CompileWord(envPtr, wordTokenPtr, interp, numWords-1);
+ } else {
+ PushLiteral(envPtr, "", 0);
+ }
+
+ /*
+ * Issue the RETURN itself.
+ */
+
+ TclEmitOpcode(INST_RETURN_STK, envPtr);
+ envPtr->currStackDepth = savedStackDepth + 1;
+ return TCL_OK;
+}
+
+static void
+CompileReturnInternal(
+ CompileEnv *envPtr,
+ unsigned char op,
+ int code,
+ int level,
+ Tcl_Obj *returnOpts)
+{
+ TclEmitPush(TclAddLiteralObj(envPtr, returnOpts, NULL), envPtr);
+ TclEmitInstInt4(op, code, envPtr);
+ TclEmitInt4(level, envPtr);
+}
+
+void
+TclCompileSyntaxError(
+ Tcl_Interp *interp,
+ CompileEnv *envPtr)
+{
+ Tcl_Obj *msg = Tcl_GetObjResult(interp);
+ int numBytes;
+ const char *bytes = TclGetStringFromObj(msg, &numBytes);
+
+ TclErrorStackResetIf(interp, bytes, numBytes);
+ TclEmitPush(TclRegisterNewLiteral(envPtr, bytes, numBytes), envPtr);
+ CompileReturnInternal(envPtr, INST_SYNTAX, TCL_ERROR, 0,
+ TclNoErrorStack(interp, Tcl_GetReturnOptions(interp, TCL_ERROR)));
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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;
+ const 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, 0,
+ &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;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * 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=1; 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, i);
+ TclEmitInstInt4( INST_VARIABLE, localIndex, envPtr);
+
+ if (i+1 < numWords) {
+ /*
+ * A value has been given: set the variable, pop the value
+ */
+
+ CompileWord(envPtr, valueTokenPtr, interp, i+1);
+ Emit14Inst( INST_STORE_SCALAR, localIndex, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ }
+ }
+
+ /*
+ * Set the result to empty
+ */
+
+ PushLiteral(envPtr, "", 0);
+ 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 (!EnvHasLVT(envPtr)) {
+ 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, 1, envPtr);
+ Tcl_DecrRefCount(tailPtr);
+ return localIndex;
+}
+
+int
+TclCompileObjectSelfCmd(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Parse *parsePtr, /* Points to a parse structure for the command
+ * created by Tcl_ParseCommand. */
+ Command *cmdPtr, /* Points to defintion of command being
+ * compiled. */
+ CompileEnv *envPtr) /* Holds resulting instructions. */
+{
+ /*
+ * We only handle [self] and [self object] (which is the same operation).
+ * These are the only very common operations on [self] for which
+ * bytecoding is at all reasonable.
+ */
+
+ if (parsePtr->numWords == 1) {
+ goto compileSelfObject;
+ } else if (parsePtr->numWords == 2) {
+ Tcl_Token *tokenPtr = TokenAfter(parsePtr->tokenPtr), *subcmd;
+
+ if (tokenPtr->type != TCL_TOKEN_SIMPLE_WORD || tokenPtr[1].size==0) {
+ return TCL_ERROR;
+ }
+
+ subcmd = tokenPtr + 1;
+ if (strncmp(subcmd->start, "object", subcmd->size) == 0) {
+ goto compileSelfObject;
+ } else if (strncmp(subcmd->start, "namespace", subcmd->size) == 0) {
+ goto compileSelfNamespace;
+ }
+ }
+
+ /*
+ * Can't compile; handle with runtime call.
+ */
+
+ return TCL_ERROR;
+
+ compileSelfObject:
+
+ /*
+ * This delegates the entire problem to a single opcode.
+ */
+
+ TclEmitOpcode( INST_TCLOO_SELF, envPtr);
+ return TCL_OK;
+
+ compileSelfNamespace:
+
+ /*
+ * This is formally only correct with TclOO methods as they are currently
+ * implemented; it assumes that the current namespace is invariably when a
+ * TclOO context is present is the object's namespace, and that's
+ * technically only something that's a matter of current policy. But it
+ * avoids creating another opcode, so that's all good!
+ */
+
+ TclEmitOpcode( INST_TCLOO_SELF, envPtr);
+ TclEmitOpcode( INST_POP, envPtr);
+ TclEmitOpcode( INST_NS_CURRENT, envPtr);
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * PushVarName --
+ *
+ * Procedure used in the compiling where pushing a variable name is
+ * necessary (append, lappend, set).
+ *
+ * Results:
+ * Returns TCL_OK for a successful compile. Returns TCL_ERROR to defer
+ * evaluation to runtime.
+ *
+ * Side effects:
+ * Instructions are added to envPtr to execute the "set" command at
+ * runtime.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static int
+PushVarName(
+ Tcl_Interp *interp, /* Used for error reporting. */
+ Tcl_Token *varTokenPtr, /* Points to a variable token. */
+ CompileEnv *envPtr, /* Holds resulting instructions. */
+ int flags, /* TCL_NO_LARGE_INDEX | TCL_NO_ELEMENT. */
+ int *localIndexPtr, /* Must not be NULL. */
+ int *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. */
+{
+ register const char *p;
+ const char *name, *elName;
+ register int i, n;
+ Tcl_Token *elemTokenPtr = NULL;
+ int nameChars, elNameChars, simpleVarName, localIndex;
+ int elemTokenCount = 0, allocedTokens = 0, removedParen = 0;
+
+ /*
+ * Decide if we can use a frame slot for the var/array name or if we need
+ * to emit code to compute and push the name at runtime. We use a frame
+ * slot (entry in the array of local vars) if we are compiling a procedure
+ * body and if the name is simple text that does not include namespace
+ * qualifiers.
+ */
+
+ simpleVarName = 0;
+ name = elName = NULL;
+ nameChars = elNameChars = 0;
+ localIndex = -1;
+
+ /*
+ * Check not only that the type is TCL_TOKEN_SIMPLE_WORD, but whether
+ * curly braces surround the variable name. This really matters for array
+ * elements to handle things like
+ * set {x($foo)} 5
+ * which raises an undefined var error if we are not careful here.
+ */
+
+ if ((varTokenPtr->type == TCL_TOKEN_SIMPLE_WORD) &&
+ (varTokenPtr->start[0] != '{')) {
+ /*
+ * A simple variable name. Divide it up into "name" and "elName"
+ * strings. If it is not a local variable, look it up at runtime.
+ */
+
+ simpleVarName = 1;
+
+ name = varTokenPtr[1].start;
+ nameChars = varTokenPtr[1].size;
+ if (name[nameChars-1] == ')') {
+ /*
+ * last char is ')' => potential array reference.
+ */
+
+ for (i=0,p=name ; i<nameChars ; i++,p++) {
+ if (*p == '(') {
+ elName = p + 1;
+ elNameChars = nameChars - i - 2;
+ nameChars = i;
+ break;
+ }
+ }
+
+ if ((elName != NULL) && elNameChars) {
+ /*
+ * An array element, the element name is a simple string:
+ * assemble the corresponding token.
+ */
+
+ elemTokenPtr = TclStackAlloc(interp, sizeof(Tcl_Token));
+ allocedTokens = 1;
+ elemTokenPtr->type = TCL_TOKEN_TEXT;
+ elemTokenPtr->start = elName;
+ elemTokenPtr->size = elNameChars;
+ elemTokenPtr->numComponents = 0;
+ elemTokenCount = 1;
+ }
+ }
+ } else if (((n = varTokenPtr->numComponents) > 1)
+ && (varTokenPtr[1].type == TCL_TOKEN_TEXT)
+ && (varTokenPtr[n].type == TCL_TOKEN_TEXT)
+ && (varTokenPtr[n].start[varTokenPtr[n].size - 1] == ')')) {
+ /*
+ * Check for parentheses inside first token.
+ */
+
+ simpleVarName = 0;
+ for (i = 0, p = varTokenPtr[1].start;
+ i < varTokenPtr[1].size; i++, p++) {
+ if (*p == '(') {
+ simpleVarName = 1;
+ break;
+ }
+ }
+ if (simpleVarName) {
+ int remainingChars;
+
+ /*
+ * Check the last token: if it is just ')', do not count it.
+ * Otherwise, remove the ')' and flag so that it is restored at
+ * the end.
+ */
+
+ if (varTokenPtr[n].size == 1) {
+ n--;
+ } else {
+ varTokenPtr[n].size--;
+ removedParen = n;
+ }
+
+ name = varTokenPtr[1].start;
+ nameChars = p - varTokenPtr[1].start;
+ elName = p + 1;
+ remainingChars = (varTokenPtr[2].start - p) - 1;
+ elNameChars = (varTokenPtr[n].start-p) + varTokenPtr[n].size - 2;
+
+ if (remainingChars) {
+ /*
+ * Make a first token with the extra characters in the first
+ * token.
+ */
+
+ elemTokenPtr = TclStackAlloc(interp, n * sizeof(Tcl_Token));
+ allocedTokens = 1;
+ elemTokenPtr->type = TCL_TOKEN_TEXT;
+ elemTokenPtr->start = elName;
+ elemTokenPtr->size = remainingChars;
+ elemTokenPtr->numComponents = 0;
+ elemTokenCount = n;
+
+ /*
+ * Copy the remaining tokens.
+ */
+
+ memcpy(elemTokenPtr+1, varTokenPtr+2,
+ (n-1) * sizeof(Tcl_Token));
+ } else {
+ /*
+ * Use the already available tokens.
+ */
+
+ elemTokenPtr = &varTokenPtr[2];
+ elemTokenCount = n - 1;
+ }
+ }
+ }
+
+ if (simpleVarName) {
+ /*
+ * See whether name has any namespace separators (::'s).
+ */
+
+ int hasNsQualifiers = 0;
+
+ for (i = 0, p = name; i < nameChars; i++, p++) {
+ if ((*p == ':') && ((i+1) < nameChars) && (*(p+1) == ':')) {
+ hasNsQualifiers = 1;
+ break;
+ }
+ }
+
+ /*
+ * Look up the var name's index in the array of local vars in the proc
+ * frame. If retrieving the var's value and it doesn't already exist,
+ * push its name and look it up at runtime.
+ */
+
+ if (!hasNsQualifiers) {
+ localIndex = TclFindCompiledLocal(name, nameChars,
+ 1, envPtr);
+ if ((flags & TCL_NO_LARGE_INDEX) && (localIndex > 255)) {
+ /*
+ * We'll push the name.
+ */
+
+ localIndex = -1;
+ }
+ }
+ if (localIndex < 0) {
+ PushLiteral(envPtr, name, nameChars);
+ }
+
+ /*
+ * Compile the element script, if any, and only if not inhibited. [Bug
+ * 3600328]
+ */
+
+ if (elName != NULL && !(flags & TCL_NO_ELEMENT)) {
+ if (elNameChars) {
+ envPtr->line = line;
+ envPtr->clNext = clNext;
+ TclCompileTokens(interp, elemTokenPtr, elemTokenCount,
+ envPtr);
+ } else {
+ PushLiteral(envPtr, "", 0);
+ }
+ }
+ } else {
+ /*
+ * The var name isn't simple: compile and push it.
+ */
+
+ envPtr->line = line;
+ envPtr->clNext = clNext;
+ CompileTokens(envPtr, varTokenPtr, interp);
+ }
+
+ if (removedParen) {
+ varTokenPtr[removedParen].size++;
+ }
+ if (allocedTokens) {
+ TclStackFree(interp, elemTokenPtr);
+ }
+ *localIndexPtr = localIndex;
+ *simpleVarNamePtr = simpleVarName;
+ *isScalarPtr = (elName == NULL);
+ return TCL_OK;
+}
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */