/* * tclExecute.c -- * * This file contains procedures that execute byte-compiled Tcl * commands. * * Copyright (c) 1996-1997 Sun Microsystems, Inc. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclExecute.c,v 1.1 2008-06-04 13:58:06 demin Exp $ */ #include "tclInt.h" #include "tclCompile.h" #ifdef NO_FLOAT_H # include "../compat/float.h" #else # include #endif #ifndef TCL_NO_MATH #include "tclMath.h" #endif /* * The stuff below is a bit of a hack so that this file can be used * in environments that include no UNIX, i.e. no errno. Just define * errno here. */ #ifndef TCL_GENERIC_ONLY #include "tclPort.h" #else #define NO_ERRNO_H #endif #ifdef NO_ERRNO_H int errno; #define EDOM 33 #define ERANGE 34 #endif /* * Boolean flag indicating whether the Tcl bytecode interpreter has been * initialized. */ static int execInitialized = 0; /* * Variable that controls whether execution tracing is enabled and, if so, * what level of tracing is desired: * 0: no execution tracing * 1: trace invocations of Tcl procs only * 2: trace invocations of all (not compiled away) commands * 3: display each instruction executed * This variable is linked to the Tcl variable "tcl_traceExec". */ int tclTraceExec = 0; /* * The following global variable is use to signal matherr that Tcl * is responsible for the arithmetic, so errors can be handled in a * fashion appropriate for Tcl. Zero means no Tcl math is in * progress; non-zero means Tcl is doing math. */ int tcl_MathInProgress = 0; /* * The variable below serves no useful purpose except to generate * a reference to matherr, so that the Tcl version of matherr is * linked in rather than the system version. Without this reference * the need for matherr won't be discovered during linking until after * libtcl.a has been processed, so Tcl's version won't be used. */ #ifdef NEED_MATHERR extern int matherr(); int (*tclMatherrPtr)() = matherr; #endif /* * Array of instruction names. */ static char *opName[256]; /* * Mapping from expression instruction opcodes to strings; used for error * messages. Note that these entries must match the order and number of the * expression opcodes (e.g., INST_LOR) in tclCompile.h. */ static char *operatorStrings[] = { "||", "&&", "|", "^", "&", "==", "!=", "<", ">", "<=", ">=", "<<", ">>", "+", "-", "*", "/", "%", "+", "-", "~", "!", "BUILTIN FUNCTION", "FUNCTION" }; /* * Mapping from Tcl result codes to strings; used for error and debugging * messages. */ #ifdef TCL_COMPILE_DEBUG static char *resultStrings[] = { "TCL_OK", "TCL_ERROR", "TCL_RETURN", "TCL_BREAK", "TCL_CONTINUE" }; #endif /* TCL_COMPILE_DEBUG */ /* * The following are statistics-related variables that record information * about the bytecode compiler and interpreter's operation. This includes * an array that records for each instruction how often it is executed. */ #ifdef TCL_COMPILE_STATS static long numExecutions = 0; static int instructionCount[256]; #endif /* TCL_COMPILE_STATS */ /* * Macros for testing floating-point values for certain special cases. Test * for not-a-number by comparing a value against itself; test for infinity * by comparing against the largest floating-point value. */ #define IS_NAN(v) ((v) != (v)) #ifdef DBL_MAX # define IS_INF(v) (((v) > DBL_MAX) || ((v) < -DBL_MAX)) #else # define IS_INF(v) 0 #endif /* * Macro to adjust the program counter and restart the instruction execution * loop after each instruction is executed. */ #define ADJUST_PC(instBytes) \ pc += instBytes; continue /* * Macros used to cache often-referenced Tcl evaluation stack information * in local variables. Note that a DECACHE_STACK_INFO()-CACHE_STACK_INFO() * pair must surround any call inside TclExecuteByteCode (and a few other * procedures that use this scheme) that could result in a recursive call * to TclExecuteByteCode. */ #define CACHE_STACK_INFO() \ stackPtr = eePtr->stackPtr; \ stackTop = eePtr->stackTop #define DECACHE_STACK_INFO() \ eePtr->stackTop = stackTop /* * Macros used to access items on the Tcl evaluation stack. PUSH_OBJECT * increments the object's ref count since it makes the stack have another * reference pointing to the object. However, POP_OBJECT does not decrement * the ref count. This is because the stack may hold the only reference to * the object, so the object would be destroyed if its ref count were * decremented before the caller had a chance to, e.g., store it in a * variable. It is the caller's responsibility to decrement the ref count * when it is finished with an object. */ #define STK_ITEM(offset) (stackPtr[stackTop + (offset)]) #define STK_OBJECT(offset) (STK_ITEM(offset).o) #define STK_INT(offset) (STK_ITEM(offset).i) #define STK_POINTER(offset) (STK_ITEM(offset).p) /* * WARNING! It is essential that objPtr only appear once in the PUSH_OBJECT * macro. The actual parameter might be an expression with side effects, * and this ensures that it will be executed only once. */ #define PUSH_OBJECT(objPtr) \ Tcl_IncrRefCount(stackPtr[++stackTop].o = (objPtr)) #define POP_OBJECT() \ (stackPtr[stackTop--].o) /* * Macros used to trace instruction execution. The macros TRACE, * TRACE_WITH_OBJ, and O2S are only used inside TclExecuteByteCode. * O2S is only used in TRACE* calls to get a string from an object. * * NOTE THAT CLIENTS OF O2S ARE LIKELY TO FAIL IF THE OBJECT'S * STRING REP CONTAINS NULLS. */ #ifdef TCL_COMPILE_DEBUG #define O2S(objPtr) \ Tcl_GetStringFromObj((objPtr), &length) #ifdef TCL_COMPILE_STATS #define TRACE(a) \ if (traceInstructions) { \ fprintf(stdout, "%d: %d,%ld (%u) ", iPtr->numLevels, \ stackTop, (tclObjsAlloced - tclObjsFreed), \ (unsigned int)(pc - codePtr->codeStart)); \ printf a; \ fflush(stdout); \ } #define TRACE_WITH_OBJ(a, objPtr) \ if (traceInstructions) { \ fprintf(stdout, "%d: %d,%ld (%u) ", iPtr->numLevels, \ stackTop, (tclObjsAlloced - tclObjsFreed), \ (unsigned int)(pc - codePtr->codeStart)); \ printf a; \ bytes = Tcl_GetStringFromObj((objPtr), &length); \ TclPrintSource(stdout, bytes, TclMin(length, 30)); \ fprintf(stdout, "\n"); \ fflush(stdout); \ } #else /* not TCL_COMPILE_STATS */ #define TRACE(a) \ if (traceInstructions) { \ fprintf(stdout, "%d: %d (%u) ", iPtr->numLevels, stackTop, \ (unsigned int)(pc - codePtr->codeStart)); \ printf a; \ fflush(stdout); \ } #define TRACE_WITH_OBJ(a, objPtr) \ if (traceInstructions) { \ fprintf(stdout, "%d: %d (%u) ", iPtr->numLevels, stackTop, \ (unsigned int)(pc - codePtr->codeStart)); \ printf a; \ bytes = Tcl_GetStringFromObj((objPtr), &length); \ TclPrintSource(stdout, bytes, TclMin(length, 30)); \ fprintf(stdout, "\n"); \ fflush(stdout); \ } #endif /* TCL_COMPILE_STATS */ #else /* not TCL_COMPILE_DEBUG */ #define TRACE(a) #define TRACE_WITH_OBJ(a, objPtr) #define O2S(objPtr) #endif /* TCL_COMPILE_DEBUG */ /* * Declarations for local procedures to this file: */ static void CallTraceProcedure _ANSI_ARGS_((Tcl_Interp *interp, Trace *tracePtr, Command *cmdPtr, char *command, int numChars, int objc, Tcl_Obj *objv[])); static void DupCmdNameInternalRep _ANSI_ARGS_((Tcl_Obj *objPtr, Tcl_Obj *copyPtr)); static int ExprAbsFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, ClientData clientData)); static int ExprBinaryFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, ClientData clientData)); static int ExprCallMathFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, int objc, Tcl_Obj **objv)); static int ExprDoubleFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, ClientData clientData)); static int ExprIntFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, ClientData clientData)); static int ExprRoundFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, ClientData clientData)); static int ExprUnaryFunc _ANSI_ARGS_((Tcl_Interp *interp, ExecEnv *eePtr, ClientData clientData)); #ifdef TCL_COMPILE_STATS static int EvalStatsCmd _ANSI_ARGS_((ClientData clientData, Tcl_Interp *interp, int argc, char **argv)); #endif /* TCL_COMPILE_STATS */ static void FreeCmdNameInternalRep _ANSI_ARGS_(( Tcl_Obj *objPtr)); static char * GetSrcInfoForPc _ANSI_ARGS_((unsigned char *pc, ByteCode* codePtr, int *lengthPtr)); static void GrowEvaluationStack _ANSI_ARGS_((ExecEnv *eePtr)); static void IllegalExprOperandType _ANSI_ARGS_(( Tcl_Interp *interp, unsigned int opCode, Tcl_Obj *opndPtr)); static void InitByteCodeExecution _ANSI_ARGS_(( Tcl_Interp *interp)); static void PrintByteCodeInfo _ANSI_ARGS_((ByteCode *codePtr)); static void RecordTracebackInfo _ANSI_ARGS_((Tcl_Interp *interp, unsigned char *pc, ByteCode *codePtr)); static int SetCmdNameFromAny _ANSI_ARGS_((Tcl_Interp *interp, Tcl_Obj *objPtr)); #ifdef TCL_COMPILE_DEBUG static char * StringForResultCode _ANSI_ARGS_((int result)); #endif /* TCL_COMPILE_DEBUG */ static void UpdateStringOfCmdName _ANSI_ARGS_((Tcl_Obj *objPtr)); #ifdef TCL_COMPILE_DEBUG static void ValidatePcAndStackTop _ANSI_ARGS_(( ByteCode *codePtr, unsigned char *pc, int stackTop, int stackLowerBound, int stackUpperBound)); #endif /* TCL_COMPILE_DEBUG */ /* * Table describing the built-in math functions. Entries in this table are * indexed by the values of the INST_CALL_BUILTIN_FUNC instruction's * operand byte. */ BuiltinFunc builtinFuncTable[] = { #ifndef TCL_NO_MATH {"acos", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) acos}, {"asin", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) asin}, {"atan", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) atan}, {"atan2", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) atan2}, {"ceil", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) ceil}, {"cos", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) cos}, {"cosh", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) cosh}, {"exp", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) exp}, {"floor", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) floor}, {"fmod", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) fmod}, {"hypot", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) hypot}, {"log", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) log}, {"log10", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) log10}, {"pow", 2, {TCL_DOUBLE, TCL_DOUBLE}, ExprBinaryFunc, (ClientData) pow}, {"sin", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) sin}, {"sinh", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) sinh}, {"sqrt", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) sqrt}, {"tan", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) tan}, {"tanh", 1, {TCL_DOUBLE}, ExprUnaryFunc, (ClientData) tanh}, #endif {"abs", 1, {TCL_EITHER}, ExprAbsFunc, 0}, {"double", 1, {TCL_EITHER}, ExprDoubleFunc, 0}, {"int", 1, {TCL_EITHER}, ExprIntFunc, 0}, {"round", 1, {TCL_EITHER}, ExprRoundFunc, 0}, {0}, }; /* * The structure below defines the command name Tcl object type by means of * procedures that can be invoked by generic object code. Objects of this * type cache the Command pointer that results from looking up command names * in the command hashtable. Such objects appear as the zeroth ("command * name") argument in a Tcl command. */ Tcl_ObjType tclCmdNameType = { "cmdName", /* name */ FreeCmdNameInternalRep, /* freeIntRepProc */ DupCmdNameInternalRep, /* dupIntRepProc */ UpdateStringOfCmdName, /* updateStringProc */ SetCmdNameFromAny /* setFromAnyProc */ }; /* *---------------------------------------------------------------------- * * InitByteCodeExecution -- * * This procedure is called once to initialize the Tcl bytecode * interpreter. * * Results: * None. * * Side effects: * This procedure initializes the array of instruction names. If * compiling with the TCL_COMPILE_STATS flag, it initializes the * array that counts the executions of each instruction and it * creates the "evalstats" command. It also registers the command name * Tcl_ObjType. It also establishes the link between the Tcl * "tcl_traceExec" and C "tclTraceExec" variables. * *---------------------------------------------------------------------- */ static void InitByteCodeExecution(interp) Tcl_Interp *interp; /* Interpreter for which the Tcl variable * "tcl_traceExec" is linked to control * instruction tracing. */ { int i; Tcl_RegisterObjType(&tclCmdNameType); (VOID *) memset(opName, 0, sizeof(opName)); for (i = 0; instructionTable[i].name != NULL; i++) { opName[i] = instructionTable[i].name; } #ifdef TCL_COMPILE_STATS (VOID *) memset(instructionCount, 0, sizeof(instructionCount)); (VOID *) memset(tclByteCodeCount, 0, sizeof(tclByteCodeCount)); (VOID *) memset(tclSourceCount, 0, sizeof(tclSourceCount)); Tcl_CreateCommand(interp, "evalstats", EvalStatsCmd, (ClientData) NULL, (Tcl_CmdDeleteProc *) NULL); #endif /* TCL_COMPILE_STATS */ if (Tcl_LinkVar(interp, "tcl_traceExec", (char *) &tclTraceExec, TCL_LINK_INT) != TCL_OK) { panic("InitByteCodeExecution: can't create link for tcl_traceExec variable"); } } /* *---------------------------------------------------------------------- * * TclCreateExecEnv -- * * This procedure creates a new execution environment for Tcl bytecode * execution. An ExecEnv points to a Tcl evaluation stack. An ExecEnv * is typically created once for each Tcl interpreter (Interp * structure) and recursively passed to TclExecuteByteCode to execute * ByteCode sequences for nested commands. * * Results: * A newly allocated ExecEnv is returned. This points to an empty * evaluation stack of the standard initial size. * * Side effects: * The bytecode interpreter is also initialized here, as this * procedure will be called before any call to TclExecuteByteCode. * *---------------------------------------------------------------------- */ #define TCL_STACK_INITIAL_SIZE 2000 ExecEnv * TclCreateExecEnv(interp) Tcl_Interp *interp; /* Interpreter for which the execution * environment is being created. */ { ExecEnv *eePtr = (ExecEnv *) ckalloc(sizeof(ExecEnv)); eePtr->stackPtr = (StackItem *) ckalloc((unsigned) (TCL_STACK_INITIAL_SIZE * sizeof(StackItem))); eePtr->stackTop = -1; eePtr->stackEnd = (TCL_STACK_INITIAL_SIZE - 1); if (!execInitialized) { TclInitAuxDataTypeTable(); InitByteCodeExecution(interp); execInitialized = 1; } return eePtr; } #undef TCL_STACK_INITIAL_SIZE /* *---------------------------------------------------------------------- * * TclDeleteExecEnv -- * * Frees the storage for an ExecEnv. * * Results: * None. * * Side effects: * Storage for an ExecEnv and its contained storage (e.g. the * evaluation stack) is freed. * *---------------------------------------------------------------------- */ void TclDeleteExecEnv(eePtr) ExecEnv *eePtr; /* Execution environment to free. */ { ckfree((char *) eePtr->stackPtr); ckfree((char *) eePtr); } /* *---------------------------------------------------------------------- * * TclFinalizeExecEnv -- * * Finalizes the execution environment setup so that it can be * later reinitialized. * * Results: * None. * * Side effects: * After this call, the next time TclCreateExecEnv will be called * it will call InitByteCodeExecution. * *---------------------------------------------------------------------- */ void TclFinalizeExecEnv() { execInitialized = 0; TclFinalizeAuxDataTypeTable(); } /* *---------------------------------------------------------------------- * * GrowEvaluationStack -- * * This procedure grows a Tcl evaluation stack stored in an ExecEnv. * * Results: * None. * * Side effects: * The size of the evaluation stack is doubled. * *---------------------------------------------------------------------- */ static void GrowEvaluationStack(eePtr) register ExecEnv *eePtr; /* Points to the ExecEnv with an evaluation * stack to enlarge. */ { /* * The current Tcl stack elements are stored from eePtr->stackPtr[0] * to eePtr->stackPtr[eePtr->stackEnd] (inclusive). */ int currElems = (eePtr->stackEnd + 1); int newElems = 2*currElems; int currBytes = currElems * sizeof(StackItem); int newBytes = 2*currBytes; StackItem *newStackPtr = (StackItem *) ckalloc((unsigned) newBytes); /* * Copy the existing stack items to the new stack space, free the old * storage if appropriate, and mark new space as malloc'ed. */ memcpy((VOID *) newStackPtr, (VOID *) eePtr->stackPtr, (size_t) currBytes); ckfree((char *) eePtr->stackPtr); eePtr->stackPtr = newStackPtr; eePtr->stackEnd = (newElems - 1); /* i.e. index of last usable item */ } /* *---------------------------------------------------------------------- * * TclExecuteByteCode -- * * This procedure executes the instructions of a ByteCode structure. * It returns when a "done" instruction is executed or an error occurs. * * Results: * The return value is one of the return codes defined in tcl.h * (such as TCL_OK), and interp->objResultPtr refers to a Tcl object * that either contains the result of executing the code or an * error message. * * Side effects: * Almost certainly, depending on the ByteCode's instructions. * *---------------------------------------------------------------------- */ int TclExecuteByteCode(interp, codePtr) Tcl_Interp *interp; /* Token for command interpreter. */ ByteCode *codePtr; /* The bytecode sequence to interpret. */ { Interp *iPtr = (Interp *) interp; ExecEnv *eePtr = iPtr->execEnvPtr; /* Points to the execution environment. */ register StackItem *stackPtr = eePtr->stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop = eePtr->stackTop; /* Cached top index of evaluation stack. */ Tcl_Obj **objArrayPtr = codePtr->objArrayPtr; /* Points to the ByteCode's object array. */ unsigned char *pc = codePtr->codeStart; /* The current program counter. */ unsigned char opCode; /* The current instruction code. */ int opnd; /* Current instruction's operand byte. */ int pcAdjustment; /* Hold pc adjustment after instruction. */ int initStackTop = stackTop;/* Stack top at start of execution. */ ExceptionRange *rangePtr; /* Points to closest loop or catch exception * range enclosing the pc. Used by various * instructions and processCatch to * process break, continue, and errors. */ int result = TCL_OK; /* Return code returned after execution. */ int traceInstructions = (tclTraceExec == 3); Tcl_Obj *valuePtr, *value2Ptr, *namePtr, *objPtr; char *bytes; int length; long i; Tcl_DString command; /* Used for debugging. If tclTraceExec >= 2 * holds a string representing the last * command invoked. */ /* * This procedure uses a stack to hold information about catch commands. * This information is the current operand stack top when starting to * execute the code for each catch command. It starts out with stack- * allocated space but uses dynamically-allocated storage if needed. */ #define STATIC_CATCH_STACK_SIZE 5 int (catchStackStorage[STATIC_CATCH_STACK_SIZE]); int *catchStackPtr = catchStackStorage; int catchTop = -1; /* * THIS PROC FAILS IF AN OBJECT'S STRING REP HAS A NULL BYTE. */ if (tclTraceExec >= 2) { PrintByteCodeInfo(codePtr); #ifdef TCL_COMPILE_STATS fprintf(stdout, " Starting stack top=%d, system objects=%ld\n", eePtr->stackTop, (tclObjsAlloced - tclObjsFreed)); #else fprintf(stdout, " Starting stack top=%d\n", eePtr->stackTop); #endif /* TCL_COMPILE_STATS */ fflush(stdout); } #ifdef TCL_COMPILE_STATS numExecutions++; #endif /* TCL_COMPILE_STATS */ /* * Make sure the catch stack is large enough to hold the maximum number * of catch commands that could ever be executing at the same time. This * will be no more than the exception range array's depth. */ if (codePtr->maxExcRangeDepth > STATIC_CATCH_STACK_SIZE) { catchStackPtr = (int *) ckalloc(codePtr->maxExcRangeDepth * sizeof(int)); } /* * Make sure the stack has enough room to execute this ByteCode. */ while ((stackTop + codePtr->maxStackDepth) > eePtr->stackEnd) { GrowEvaluationStack(eePtr); stackPtr = eePtr->stackPtr; } /* * Initialize the buffer that holds a string containing the name and * arguments for the last invoked command. */ Tcl_DStringInit(&command); /* * Loop executing instructions until a "done" instruction, a TCL_RETURN, * or some error. */ for (;;) { #ifdef TCL_COMPILE_DEBUG ValidatePcAndStackTop(codePtr, pc, stackTop, initStackTop, eePtr->stackEnd); #else /* not TCL_COMPILE_DEBUG */ if (traceInstructions) { #ifdef TCL_COMPILE_STATS fprintf(stdout, "%d: %d,%ld ", iPtr->numLevels, stackTop, (tclObjsAlloced - tclObjsFreed)); #else /* TCL_COMPILE_STATS */ fprintf(stdout, "%d: %d ", iPtr->numLevels, stackTop); #endif /* TCL_COMPILE_STATS */ TclPrintInstruction(codePtr, pc); fflush(stdout); } #endif /* TCL_COMPILE_DEBUG */ opCode = *pc; #ifdef TCL_COMPILE_STATS instructionCount[opCode]++; #endif /* TCL_COMPILE_STATS */ switch (opCode) { case INST_DONE: /* * Pop the topmost object from the stack, set the interpreter's * object result to point to it, and return. */ valuePtr = POP_OBJECT(); Tcl_SetObjResult(interp, valuePtr); TclDecrRefCount(valuePtr); if (stackTop != initStackTop) { fprintf(stderr, "\nTclExecuteByteCode: done instruction at pc %u: stack top %d != entry stack top %d\n", (unsigned int)(pc - codePtr->codeStart), (unsigned int) stackTop, (unsigned int) initStackTop); fprintf(stderr, " Source: "); TclPrintSource(stderr, codePtr->source, 150); panic("TclExecuteByteCode execution failure: end stack top != start stack top"); } TRACE_WITH_OBJ(("done => return code=%d, result is ", result), iPtr->objResultPtr); goto done; case INST_PUSH1: valuePtr = objArrayPtr[TclGetUInt1AtPtr(pc+1)]; PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("push1 %u => ", TclGetUInt1AtPtr(pc+1)), valuePtr); ADJUST_PC(2); case INST_PUSH4: valuePtr = objArrayPtr[TclGetUInt4AtPtr(pc+1)]; PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("push4 %u => ", TclGetUInt4AtPtr(pc+1)), valuePtr); ADJUST_PC(5); case INST_POP: valuePtr = POP_OBJECT(); TRACE_WITH_OBJ(("pop => discarding "), valuePtr); TclDecrRefCount(valuePtr); /* finished with pop'ed object. */ ADJUST_PC(1); case INST_DUP: valuePtr = stackPtr[stackTop].o; PUSH_OBJECT(Tcl_DuplicateObj(valuePtr)); TRACE_WITH_OBJ(("dup => "), valuePtr); ADJUST_PC(1); case INST_CONCAT1: opnd = TclGetUInt1AtPtr(pc+1); { Tcl_Obj *concatObjPtr; int totalLen = 0; /* * Concatenate strings (with no separators) from the top * opnd items on the stack starting with the deepest item. * First, determine how many characters are needed. */ for (i = (stackTop - (opnd-1)); i <= stackTop; i++) { valuePtr = stackPtr[i].o; bytes = TclGetStringFromObj(valuePtr, &length); if (bytes != NULL) { totalLen += length; } } /* * Initialize the new append string object by appending the * strings of the opnd stack objects. Also pop the objects. */ TclNewObj(concatObjPtr); if (totalLen > 0) { char *p = (char *) ckalloc((unsigned) (totalLen + 1)); concatObjPtr->bytes = p; concatObjPtr->length = totalLen; for (i = (stackTop - (opnd-1)); i <= stackTop; i++) { valuePtr = stackPtr[i].o; bytes = TclGetStringFromObj(valuePtr, &length); if (bytes != NULL) { memcpy((VOID *) p, (VOID *) bytes, (size_t) length); p += length; } TclDecrRefCount(valuePtr); } *p = '\0'; } else { for (i = (stackTop - (opnd-1)); i <= stackTop; i++) { valuePtr = stackPtr[i].o; Tcl_DecrRefCount(valuePtr); } } stackTop -= opnd; PUSH_OBJECT(concatObjPtr); TRACE_WITH_OBJ(("concat %u => ", opnd), concatObjPtr); ADJUST_PC(2); } case INST_INVOKE_STK4: opnd = TclGetUInt4AtPtr(pc+1); pcAdjustment = 5; goto doInvocation; case INST_INVOKE_STK1: opnd = TclGetUInt1AtPtr(pc+1); pcAdjustment = 2; doInvocation: { char *cmdName; Command *cmdPtr; /* Points to command's Command struct. */ int objc = opnd; /* The number of arguments. */ Tcl_Obj **objv; /* The array of argument objects. */ Tcl_Obj *objv0Ptr; /* Holds objv[0], the command name. */ int newPcOffset = 0; /* Instruction offset computed during * break, continue, error processing. * Init. to avoid compiler warning. */ Tcl_Command cmd; #ifdef TCL_COMPILE_DEBUG int isUnknownCmd = 0; char cmdNameBuf[30]; #endif /* TCL_COMPILE_DEBUG */ /* * If the interpreter was deleted, return an error. */ if (iPtr->flags & DELETED) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "attempt to call eval in deleted interpreter", -1); Tcl_SetErrorCode(interp, "CORE", "IDELETE", "attempt to call eval in deleted interpreter", (char *) NULL); result = TCL_ERROR; goto checkForCatch; } objv = &(stackPtr[stackTop - (objc-1)].o); objv0Ptr = objv[0]; cmdName = TclGetStringFromObj(objv0Ptr, (int *) NULL); /* * Find the procedure to execute this command. If there * isn't one, then see if there is a command "unknown". If * so, invoke it, passing it the original command words as * arguments. * * We convert the objv[0] object to be a CmdName object. * This caches a pointer to the Command structure for the * command; this pointer is held in a ResolvedCmdName * structure the object's internal rep. points to. */ cmd = Tcl_GetCommandFromObj(interp, objv0Ptr); cmdPtr = (Command *) cmd; /* * If the command is still not found, handle it with the * "unknown" proc. */ if (cmdPtr == NULL) { cmd = Tcl_FindCommand(interp, "unknown", (Tcl_Namespace *) NULL, /*flags*/ TCL_GLOBAL_ONLY); if (cmd == (Tcl_Command) NULL) { Tcl_ResetResult(interp); Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "invalid command name \"", cmdName, "\"", (char *) NULL); TRACE(("%s %u => unknown proc not found: ", opName[opCode], objc)); result = TCL_ERROR; goto checkForCatch; } cmdPtr = (Command *) cmd; #ifdef TCL_COMPILE_DEBUG isUnknownCmd = 1; #endif /*TCL_COMPILE_DEBUG*/ stackTop++; /* need room for new inserted objv[0] */ for (i = objc; i >= 0; i--) { objv[i+1] = objv[i]; } objc++; objv[0] = Tcl_NewStringObj("unknown", -1); Tcl_IncrRefCount(objv[0]); } /* * Call any trace procedures. */ if (iPtr->tracePtr != NULL) { Trace *tracePtr, *nextTracePtr; for (tracePtr = iPtr->tracePtr; tracePtr != NULL; tracePtr = nextTracePtr) { nextTracePtr = tracePtr->nextPtr; if (iPtr->numLevels <= tracePtr->level) { int numChars; char *cmd = GetSrcInfoForPc(pc, codePtr, &numChars); if (cmd != NULL) { DECACHE_STACK_INFO(); CallTraceProcedure(interp, tracePtr, cmdPtr, cmd, numChars, objc, objv); CACHE_STACK_INFO(); } } } } /* * Finally, invoke the command's Tcl_ObjCmdProc. First reset * the interpreter's string and object results to their * default empty values since they could have gotten changed * by earlier invocations. */ Tcl_ResetResult(interp); if (tclTraceExec >= 2) { char buffer[50]; sprintf(buffer, "%d: (%u) invoking ", iPtr->numLevels, (unsigned int)(pc - codePtr->codeStart)); Tcl_DStringAppend(&command, buffer, -1); #ifdef TCL_COMPILE_DEBUG if (traceInstructions) { /* tclTraceExec == 3 */ strncpy(cmdNameBuf, cmdName, 20); TRACE(("%s %u => call ", opName[opCode], (isUnknownCmd? objc-1 : objc))); } else { fprintf(stdout, "%s", buffer); } #else /* TCL_COMPILE_DEBUG */ fprintf(stdout, "%s", buffer); #endif /*TCL_COMPILE_DEBUG*/ for (i = 0; i < objc; i++) { bytes = TclGetStringFromObj(objv[i], &length); TclPrintSource(stdout, bytes, TclMin(length, 15)); fprintf(stdout, " "); sprintf(buffer, "\"%.*s\" ", TclMin(length, 15), bytes); Tcl_DStringAppend(&command, buffer, -1); } fprintf(stdout, "\n"); fflush(stdout); Tcl_DStringFree(&command); } iPtr->cmdCount++; DECACHE_STACK_INFO(); result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, objc, objv); if (Tcl_AsyncReady()) { result = Tcl_AsyncInvoke(interp, result); } CACHE_STACK_INFO(); /* * If the interpreter has a non-empty string result, the * result object is either empty or stale because some * procedure set interp->result directly. If so, move the * string result to the result object, then reset the * string result. */ if (*(iPtr->result) != 0) { (void) Tcl_GetObjResult(interp); } /* * Pop the objc top stack elements and decrement their ref * counts. */ i = (stackTop - (objc-1)); while (i <= stackTop) { valuePtr = stackPtr[i].o; TclDecrRefCount(valuePtr); i++; } stackTop -= objc; /* * Process the result of the Tcl_ObjCmdProc call. */ switch (result) { case TCL_OK: /* * Push the call's object result and continue execution * with the next instruction. */ PUSH_OBJECT(Tcl_GetObjResult(interp)); TRACE_WITH_OBJ(("%s %u => ...after \"%.20s\", result=", opName[opCode], objc, cmdNameBuf), Tcl_GetObjResult(interp)); ADJUST_PC(pcAdjustment); case TCL_BREAK: case TCL_CONTINUE: /* * The invoked command requested a break or continue. * Find the closest enclosing loop or catch exception * range, if any. If a loop is found, terminate its * execution or skip to its next iteration. If the * closest is a catch exception range, jump to its * catchOffset. If no enclosing range is found, stop * execution and return the TCL_BREAK or TCL_CONTINUE. */ rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0, codePtr); if (rangePtr == NULL) { TRACE(("%s %u => ... after \"%.20s\", no encl. loop or catch, returning %s\n", opName[opCode], objc, cmdNameBuf, StringForResultCode(result))); goto abnormalReturn; /* no catch exists to check */ } switch (rangePtr->type) { case LOOP_EXCEPTION_RANGE: if (result == TCL_BREAK) { newPcOffset = rangePtr->breakOffset; } else if (rangePtr->continueOffset == -1) { TRACE(("%s %u => ... after \"%.20s\", %s, loop w/o continue, checking for catch\n", opName[opCode], objc, cmdNameBuf, StringForResultCode(result))); goto checkForCatch; } else { newPcOffset = rangePtr->continueOffset; } TRACE(("%s %u => ... after \"%.20s\", %s, range at %d, new pc %d\n", opName[opCode], objc, cmdNameBuf, StringForResultCode(result), rangePtr->codeOffset, newPcOffset)); break; case CATCH_EXCEPTION_RANGE: TRACE(("%s %u => ... after \"%.20s\", %s...\n", opName[opCode], objc, cmdNameBuf, StringForResultCode(result))); goto processCatch; /* it will use rangePtr */ default: panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); } result = TCL_OK; pc = (codePtr->codeStart + newPcOffset); continue; /* restart outer instruction loop at pc */ case TCL_ERROR: /* * The invoked command returned an error. Look for an * enclosing catch exception range, if any. */ TRACE_WITH_OBJ(("%s %u => ... after \"%.20s\", TCL_ERROR ", opName[opCode], objc, cmdNameBuf), Tcl_GetObjResult(interp)); goto checkForCatch; case TCL_RETURN: /* * The invoked command requested that the current * procedure stop execution and return. First check * for an enclosing catch exception range, if any. */ TRACE(("%s %u => ... after \"%.20s\", TCL_RETURN\n", opName[opCode], objc, cmdNameBuf)); goto checkForCatch; default: TRACE_WITH_OBJ(("%s %u => ... after \"%.20s\", OTHER RETURN CODE %d ", opName[opCode], objc, cmdNameBuf, result), Tcl_GetObjResult(interp)); goto checkForCatch; } /* end of switch on result from invoke instruction */ } case INST_EVAL_STK: objPtr = POP_OBJECT(); DECACHE_STACK_INFO(); result = Tcl_EvalObj(interp, objPtr); CACHE_STACK_INFO(); if (result == TCL_OK) { /* * Normal return; push the eval's object result. */ PUSH_OBJECT(Tcl_GetObjResult(interp)); TRACE_WITH_OBJ(("evalStk \"%.30s\" => ", O2S(objPtr)), Tcl_GetObjResult(interp)); TclDecrRefCount(objPtr); ADJUST_PC(1); } else if ((result == TCL_BREAK) || (result == TCL_CONTINUE)) { /* * Find the closest enclosing loop or catch exception range, * if any. If a loop is found, terminate its execution or * skip to its next iteration. If the closest is a catch * exception range, jump to its catchOffset. If no enclosing * range is found, stop execution and return that same * TCL_BREAK or TCL_CONTINUE. */ int newPcOffset = 0; /* Pc offset computed during break, * continue, error processing. Init. * to avoid compiler warning. */ rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0, codePtr); if (rangePtr == NULL) { TRACE(("evalStk \"%.30s\" => no encl. loop or catch, returning %s\n", O2S(objPtr), StringForResultCode(result))); Tcl_DecrRefCount(objPtr); goto abnormalReturn; /* no catch exists to check */ } switch (rangePtr->type) { case LOOP_EXCEPTION_RANGE: if (result == TCL_BREAK) { newPcOffset = rangePtr->breakOffset; } else if (rangePtr->continueOffset == -1) { TRACE(("evalStk \"%.30s\" => %s, loop w/o continue, checking for catch\n", O2S(objPtr), StringForResultCode(result))); Tcl_DecrRefCount(objPtr); goto checkForCatch; } else { newPcOffset = rangePtr->continueOffset; } result = TCL_OK; TRACE_WITH_OBJ(("evalStk \"%.30s\" => %s, range at %d, new pc %d ", O2S(objPtr), StringForResultCode(result), rangePtr->codeOffset, newPcOffset), valuePtr); break; case CATCH_EXCEPTION_RANGE: TRACE_WITH_OBJ(("evalStk \"%.30s\" => %s ", O2S(objPtr), StringForResultCode(result)), valuePtr); Tcl_DecrRefCount(objPtr); goto processCatch; /* it will use rangePtr */ default: panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); } Tcl_DecrRefCount(objPtr); pc = (codePtr->codeStart + newPcOffset); continue; /* restart outer instruction loop at pc */ } else { /* eval returned TCL_ERROR, TCL_RETURN, unknown code */ TRACE_WITH_OBJ(("evalStk \"%.30s\" => ERROR: ", O2S(objPtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(objPtr); goto checkForCatch; } case INST_EXPR_STK: objPtr = POP_OBJECT(); Tcl_ResetResult(interp); DECACHE_STACK_INFO(); result = Tcl_ExprObj(interp, objPtr, &valuePtr); CACHE_STACK_INFO(); if (result != TCL_OK) { TRACE_WITH_OBJ(("exprStk \"%.30s\" => ERROR: ", O2S(objPtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(objPtr); goto checkForCatch; } stackPtr[++stackTop].o = valuePtr; /* already has right refct */ TRACE_WITH_OBJ(("exprStk \"%.30s\" => ", O2S(objPtr)), valuePtr); TclDecrRefCount(objPtr); ADJUST_PC(1); case INST_LOAD_SCALAR4: opnd = TclGetInt4AtPtr(pc+1); pcAdjustment = 5; goto doLoadScalar; case INST_LOAD_SCALAR1: opnd = TclGetUInt1AtPtr(pc+1); pcAdjustment = 2; doLoadScalar: DECACHE_STACK_INFO(); valuePtr = TclGetIndexedScalar(interp, opnd, /*leaveErrorMsg*/ 1); CACHE_STACK_INFO(); if (valuePtr == NULL) { TRACE_WITH_OBJ(("%s %u => ERROR: ", opName[opCode], opnd), Tcl_GetObjResult(interp)); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("%s %u => ", opName[opCode], opnd), valuePtr); ADJUST_PC(pcAdjustment); case INST_LOAD_SCALAR_STK: namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); valuePtr = Tcl_ObjGetVar2(interp, namePtr, (Tcl_Obj *) NULL, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (valuePtr == NULL) { TRACE_WITH_OBJ(("loadScalarStk \"%.30s\" => ERROR: ", O2S(namePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("loadScalarStk \"%.30s\" => ", O2S(namePtr)), valuePtr); TclDecrRefCount(namePtr); ADJUST_PC(1); case INST_LOAD_ARRAY4: opnd = TclGetUInt4AtPtr(pc+1); pcAdjustment = 5; goto doLoadArray; case INST_LOAD_ARRAY1: opnd = TclGetUInt1AtPtr(pc+1); pcAdjustment = 2; doLoadArray: { Tcl_Obj *elemPtr = POP_OBJECT(); DECACHE_STACK_INFO(); valuePtr = TclGetElementOfIndexedArray(interp, opnd, elemPtr, /*leaveErrorMsg*/ 1); CACHE_STACK_INFO(); if (valuePtr == NULL) { TRACE_WITH_OBJ(("%s %u \"%.30s\" => ERROR: ", opName[opCode], opnd, O2S(elemPtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(elemPtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("%s %u \"%.30s\" => ", opName[opCode], opnd, O2S(elemPtr)), valuePtr); TclDecrRefCount(elemPtr); } ADJUST_PC(pcAdjustment); case INST_LOAD_ARRAY_STK: { Tcl_Obj *elemPtr = POP_OBJECT(); namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); valuePtr = Tcl_ObjGetVar2(interp, namePtr, elemPtr, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (valuePtr == NULL) { TRACE_WITH_OBJ(("loadArrayStk \"%.30s(%.30s)\" => ERROR: ", O2S(namePtr), O2S(elemPtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("loadArrayStk \"%.30s(%.30s)\" => ", O2S(namePtr), O2S(elemPtr)), valuePtr); TclDecrRefCount(namePtr); TclDecrRefCount(elemPtr); } ADJUST_PC(1); case INST_LOAD_STK: namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); valuePtr = Tcl_ObjGetVar2(interp, namePtr, NULL, TCL_PARSE_PART1|TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (valuePtr == NULL) { TRACE_WITH_OBJ(("loadStk \"%.30s\" => ERROR: ", O2S(namePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(valuePtr); TRACE_WITH_OBJ(("loadStk \"%.30s\" => ", O2S(namePtr)), valuePtr); TclDecrRefCount(namePtr); ADJUST_PC(1); case INST_STORE_SCALAR4: opnd = TclGetUInt4AtPtr(pc+1); pcAdjustment = 5; goto doStoreScalar; case INST_STORE_SCALAR1: opnd = TclGetUInt1AtPtr(pc+1); pcAdjustment = 2; doStoreScalar: valuePtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = TclSetIndexedScalar(interp, opnd, valuePtr, /*leaveErrorMsg*/ 1); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("%s %u <- \"%.30s\" => ERROR: ", opName[opCode], opnd, O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("%s %u <- \"%.30s\" => ", opName[opCode], opnd, O2S(valuePtr)), value2Ptr); TclDecrRefCount(valuePtr); ADJUST_PC(pcAdjustment); case INST_STORE_SCALAR_STK: valuePtr = POP_OBJECT(); namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = Tcl_ObjSetVar2(interp, namePtr, NULL, valuePtr, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ( ("storeScalarStk \"%.30s\" <- \"%.30s\" => ERROR: ", O2S(namePtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ( ("storeScalarStk \"%.30s\" <- \"%.30s\" => ", O2S(namePtr), O2S(valuePtr)), value2Ptr); TclDecrRefCount(namePtr); TclDecrRefCount(valuePtr); ADJUST_PC(1); case INST_STORE_ARRAY4: opnd = TclGetUInt4AtPtr(pc+1); pcAdjustment = 5; goto doStoreArray; case INST_STORE_ARRAY1: opnd = TclGetUInt1AtPtr(pc+1); pcAdjustment = 2; doStoreArray: { Tcl_Obj *elemPtr; valuePtr = POP_OBJECT(); elemPtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = TclSetElementOfIndexedArray(interp, opnd, elemPtr, valuePtr, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ( ("%s %u \"%.30s\" <- \"%.30s\" => ERROR: ", opName[opCode], opnd, O2S(elemPtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("%s %u \"%.30s\" <- \"%.30s\" => ", opName[opCode], opnd, O2S(elemPtr), O2S(valuePtr)), value2Ptr); TclDecrRefCount(elemPtr); TclDecrRefCount(valuePtr); } ADJUST_PC(pcAdjustment); case INST_STORE_ARRAY_STK: { Tcl_Obj *elemPtr; valuePtr = POP_OBJECT(); elemPtr = POP_OBJECT(); namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = Tcl_ObjSetVar2(interp, namePtr, elemPtr, valuePtr, TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("storeArrayStk \"%.30s(%.30s)\" <- \"%.30s\" => ERROR: ", O2S(namePtr), O2S(elemPtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("storeArrayStk \"%.30s(%.30s)\" <- \"%.30s\" => ", O2S(namePtr), O2S(elemPtr), O2S(valuePtr)), value2Ptr); TclDecrRefCount(namePtr); TclDecrRefCount(elemPtr); TclDecrRefCount(valuePtr); } ADJUST_PC(1); case INST_STORE_STK: valuePtr = POP_OBJECT(); namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = Tcl_ObjSetVar2(interp, namePtr, NULL, valuePtr, TCL_PARSE_PART1|TCL_LEAVE_ERR_MSG); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("storeStk \"%.30s\" <- \"%.30s\" => ERROR: ", O2S(namePtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("storeStk \"%.30s\" <- \"%.30s\" => ", O2S(namePtr), O2S(valuePtr)), value2Ptr); TclDecrRefCount(namePtr); TclDecrRefCount(valuePtr); ADJUST_PC(1); case INST_INCR_SCALAR1: opnd = TclGetUInt1AtPtr(pc+1); valuePtr = POP_OBJECT(); if (valuePtr->typePtr != &tclIntType) { result = tclIntType.setFromAnyProc(interp, valuePtr); if (result != TCL_OK) { TRACE_WITH_OBJ(("incrScalar1 %u (by %s) => ERROR converting increment amount to int: ", opnd, O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } i = valuePtr->internalRep.longValue; DECACHE_STACK_INFO(); value2Ptr = TclIncrIndexedScalar(interp, opnd, i); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("incrScalar1 %u (by %ld) => ERROR: ", opnd, i), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("incrScalar1 %u (by %ld) => ", opnd, i), value2Ptr); TclDecrRefCount(valuePtr); ADJUST_PC(2); case INST_INCR_SCALAR_STK: case INST_INCR_STK: valuePtr = POP_OBJECT(); namePtr = POP_OBJECT(); if (valuePtr->typePtr != &tclIntType) { result = tclIntType.setFromAnyProc(interp, valuePtr); if (result != TCL_OK) { TRACE_WITH_OBJ(("%s \"%.30s\" (by %s) => ERROR converting increment amount to int: ", opName[opCode], O2S(namePtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } i = valuePtr->internalRep.longValue; DECACHE_STACK_INFO(); value2Ptr = TclIncrVar2(interp, namePtr, (Tcl_Obj *) NULL, i, /*part1NotParsed*/ (opCode == INST_INCR_STK)); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("%s \"%.30s\" (by %ld) => ERROR: ", opName[opCode], O2S(namePtr), i), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("%s \"%.30s\" (by %ld) => ", opName[opCode], O2S(namePtr), i), value2Ptr); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(valuePtr); ADJUST_PC(1); case INST_INCR_ARRAY1: { Tcl_Obj *elemPtr; opnd = TclGetUInt1AtPtr(pc+1); valuePtr = POP_OBJECT(); elemPtr = POP_OBJECT(); if (valuePtr->typePtr != &tclIntType) { result = tclIntType.setFromAnyProc(interp, valuePtr); if (result != TCL_OK) { TRACE_WITH_OBJ(("incrArray1 %u \"%.30s\" (by %s) => ERROR converting increment amount to int: ", opnd, O2S(elemPtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } i = valuePtr->internalRep.longValue; DECACHE_STACK_INFO(); value2Ptr = TclIncrElementOfIndexedArray(interp, opnd, elemPtr, i); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("incrArray1 %u \"%.30s\" (by %ld) => ERROR: ", opnd, O2S(elemPtr), i), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("incrArray1 %u \"%.30s\" (by %ld) => ", opnd, O2S(elemPtr), i), value2Ptr); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); } ADJUST_PC(2); case INST_INCR_ARRAY_STK: { Tcl_Obj *elemPtr; valuePtr = POP_OBJECT(); elemPtr = POP_OBJECT(); namePtr = POP_OBJECT(); if (valuePtr->typePtr != &tclIntType) { result = tclIntType.setFromAnyProc(interp, valuePtr); if (result != TCL_OK) { TRACE_WITH_OBJ(("incrArrayStk \"%.30s(%.30s)\" (by %s) => ERROR converting increment amount to int: ", O2S(namePtr), O2S(elemPtr), O2S(valuePtr)), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } i = valuePtr->internalRep.longValue; DECACHE_STACK_INFO(); value2Ptr = TclIncrVar2(interp, namePtr, elemPtr, i, /*part1NotParsed*/ 0); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("incrArrayStk \"%.30s(%.30s)\" (by %ld) => ERROR: ", O2S(namePtr), O2S(elemPtr), i), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("incrArrayStk \"%.30s(%.30s)\" (by %ld) => ", O2S(namePtr), O2S(elemPtr), i), value2Ptr); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); Tcl_DecrRefCount(valuePtr); } ADJUST_PC(1); case INST_INCR_SCALAR1_IMM: opnd = TclGetUInt1AtPtr(pc+1); i = TclGetInt1AtPtr(pc+2); DECACHE_STACK_INFO(); value2Ptr = TclIncrIndexedScalar(interp, opnd, i); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("incrScalar1Imm %u %ld => ERROR: ", opnd, i), Tcl_GetObjResult(interp)); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("incrScalar1Imm %u %ld => ", opnd, i), value2Ptr); ADJUST_PC(3); case INST_INCR_SCALAR_STK_IMM: case INST_INCR_STK_IMM: namePtr = POP_OBJECT(); i = TclGetInt1AtPtr(pc+1); DECACHE_STACK_INFO(); value2Ptr = TclIncrVar2(interp, namePtr, (Tcl_Obj *) NULL, i, /*part1NotParsed*/ (opCode == INST_INCR_STK_IMM)); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("%s \"%.30s\" %ld => ERROR: ", opName[opCode], O2S(namePtr), i), Tcl_GetObjResult(interp)); result = TCL_ERROR; Tcl_DecrRefCount(namePtr); goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("%s \"%.30s\" %ld => ", opName[opCode], O2S(namePtr), i), value2Ptr); TclDecrRefCount(namePtr); ADJUST_PC(2); case INST_INCR_ARRAY1_IMM: { Tcl_Obj *elemPtr; opnd = TclGetUInt1AtPtr(pc+1); i = TclGetInt1AtPtr(pc+2); elemPtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = TclIncrElementOfIndexedArray(interp, opnd, elemPtr, i); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("incrArray1Imm %u \"%.30s\" (by %ld) => ERROR: ", opnd, O2S(elemPtr), i), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(elemPtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("incrArray1Imm %u \"%.30s\" (by %ld) => ", opnd, O2S(elemPtr), i), value2Ptr); Tcl_DecrRefCount(elemPtr); } ADJUST_PC(3); case INST_INCR_ARRAY_STK_IMM: { Tcl_Obj *elemPtr; i = TclGetInt1AtPtr(pc+1); elemPtr = POP_OBJECT(); namePtr = POP_OBJECT(); DECACHE_STACK_INFO(); value2Ptr = TclIncrVar2(interp, namePtr, elemPtr, i, /*part1NotParsed*/ 0); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("incrArrayStkImm \"%.30s(%.30s)\" (by %ld) => ERROR: ", O2S(namePtr), O2S(elemPtr), i), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); result = TCL_ERROR; goto checkForCatch; } PUSH_OBJECT(value2Ptr); TRACE_WITH_OBJ(("incrArrayStkImm \"%.30s(%.30s)\" (by %ld) => ", O2S(namePtr), O2S(elemPtr), i), value2Ptr); Tcl_DecrRefCount(namePtr); Tcl_DecrRefCount(elemPtr); } ADJUST_PC(2); case INST_JUMP1: opnd = TclGetInt1AtPtr(pc+1); TRACE(("jump1 %d => new pc %u\n", opnd, (unsigned int)(pc + opnd - codePtr->codeStart))); ADJUST_PC(opnd); case INST_JUMP4: opnd = TclGetInt4AtPtr(pc+1); TRACE(("jump4 %d => new pc %u\n", opnd, (unsigned int)(pc + opnd - codePtr->codeStart))); ADJUST_PC(opnd); case INST_JUMP_TRUE4: opnd = TclGetInt4AtPtr(pc+1); pcAdjustment = 5; goto doJumpTrue; case INST_JUMP_TRUE1: opnd = TclGetInt1AtPtr(pc+1); pcAdjustment = 2; doJumpTrue: { int b; valuePtr = POP_OBJECT(); if (valuePtr->typePtr == &tclIntType) { b = (valuePtr->internalRep.longValue != 0); } else if (valuePtr->typePtr == &tclDoubleType) { b = (valuePtr->internalRep.doubleValue != 0.0); } else { result = Tcl_GetBooleanFromObj(interp, valuePtr, &b); if (result != TCL_OK) { TRACE_WITH_OBJ(("%s %d => ERROR: ", opName[opCode], opnd), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } if (b) { TRACE(("%s %d => %.20s true, new pc %u\n", opName[opCode], opnd, O2S(valuePtr), (unsigned int)(pc+opnd - codePtr->codeStart))); TclDecrRefCount(valuePtr); ADJUST_PC(opnd); } else { TRACE(("%s %d => %.20s false\n", opName[opCode], opnd, O2S(valuePtr))); TclDecrRefCount(valuePtr); ADJUST_PC(pcAdjustment); } } case INST_JUMP_FALSE4: opnd = TclGetInt4AtPtr(pc+1); pcAdjustment = 5; goto doJumpFalse; case INST_JUMP_FALSE1: opnd = TclGetInt1AtPtr(pc+1); pcAdjustment = 2; doJumpFalse: { int b; valuePtr = POP_OBJECT(); if (valuePtr->typePtr == &tclIntType) { b = (valuePtr->internalRep.longValue != 0); } else if (valuePtr->typePtr == &tclDoubleType) { b = (valuePtr->internalRep.doubleValue != 0.0); } else { result = Tcl_GetBooleanFromObj(interp, valuePtr, &b); if (result != TCL_OK) { TRACE_WITH_OBJ(("%s %d => ERROR: ", opName[opCode], opnd), Tcl_GetObjResult(interp)); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } if (b) { TRACE(("%s %d => %.20s true\n", opName[opCode], opnd, O2S(valuePtr))); TclDecrRefCount(valuePtr); ADJUST_PC(pcAdjustment); } else { TRACE(("%s %d => %.20s false, new pc %u\n", opName[opCode], opnd, O2S(valuePtr), (unsigned int)(pc + opnd - codePtr->codeStart))); TclDecrRefCount(valuePtr); ADJUST_PC(opnd); } } case INST_LOR: case INST_LAND: { /* * Operands must be boolean or numeric. No int->double * conversions are performed. */ int i1, i2; int iResult; char *s; Tcl_ObjType *t1Ptr, *t2Ptr; value2Ptr = POP_OBJECT(); valuePtr = POP_OBJECT(); t1Ptr = valuePtr->typePtr; t2Ptr = value2Ptr->typePtr; if ((t1Ptr == &tclIntType) || (t1Ptr == &tclBooleanType)) { i1 = (valuePtr->internalRep.longValue != 0); } else if (t1Ptr == &tclDoubleType) { i1 = (valuePtr->internalRep.doubleValue != 0.0); } else { /* FAILS IF NULL STRING REP */ s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); i1 = (i != 0); } else { result = Tcl_GetBooleanFromObj((Tcl_Interp *) NULL, valuePtr, &i1); i1 = (i1 != 0); } if (result != TCL_OK) { TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s \n", opName[opCode], O2S(valuePtr), (t1Ptr? t1Ptr->name : "null"))); IllegalExprOperandType(interp, opCode, valuePtr); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } } if ((t2Ptr == &tclIntType) || (t2Ptr == &tclBooleanType)) { i2 = (value2Ptr->internalRep.longValue != 0); } else if (t2Ptr == &tclDoubleType) { i2 = (value2Ptr->internalRep.doubleValue != 0.0); } else { /* FAILS IF NULL STRING REP */ s = Tcl_GetStringFromObj(value2Ptr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, value2Ptr, &i); i2 = (i != 0); } else { result = Tcl_GetBooleanFromObj((Tcl_Interp *) NULL, value2Ptr, &i2); i2 = (i2 != 0); } if (result != TCL_OK) { TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s \n", opName[opCode], O2S(value2Ptr), (t2Ptr? t2Ptr->name : "null"))); IllegalExprOperandType(interp, opCode, value2Ptr); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } } /* * Reuse the valuePtr object already on stack if possible. */ if (opCode == INST_LOR) { iResult = (i1 || i2); } else { iResult = (i1 && i2); } if (Tcl_IsShared(valuePtr)) { PUSH_OBJECT(Tcl_NewLongObj(iResult)); TRACE(("%s %.20s %.20s => %d\n", opName[opCode], O2S(valuePtr), O2S(value2Ptr), iResult)); TclDecrRefCount(valuePtr); } else { /* reuse the valuePtr object */ TRACE(("%s %.20s %.20s => %d\n", opName[opCode], /* NB: stack top is off by 1 */ O2S(valuePtr), O2S(value2Ptr), iResult)); Tcl_SetLongObj(valuePtr, iResult); ++stackTop; /* valuePtr now on stk top has right r.c. */ } TclDecrRefCount(value2Ptr); } ADJUST_PC(1); case INST_EQ: case INST_NEQ: case INST_LT: case INST_GT: case INST_LE: case INST_GE: { /* * Any type is allowed but the two operands must have the * same type. We will compute value op value2. */ Tcl_ObjType *t1Ptr, *t2Ptr; char *s1 = NULL; /* Init. avoids compiler warning. */ char *s2 = NULL; /* Init. avoids compiler warning. */ long i2 = 0; /* Init. avoids compiler warning. */ double d1 = 0.0; /* Init. avoids compiler warning. */ double d2 = 0.0; /* Init. avoids compiler warning. */ long iResult = 0; /* Init. avoids compiler warning. */ value2Ptr = POP_OBJECT(); valuePtr = POP_OBJECT(); t1Ptr = valuePtr->typePtr; t2Ptr = value2Ptr->typePtr; if ((t1Ptr != &tclIntType) && (t1Ptr != &tclDoubleType)) { s1 = Tcl_GetStringFromObj(valuePtr, &length); if (TclLooksLikeInt(s1)) { /* FAILS IF NULLS */ (void) Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { (void) Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d1); } t1Ptr = valuePtr->typePtr; } if ((t2Ptr != &tclIntType) && (t2Ptr != &tclDoubleType)) { s2 = Tcl_GetStringFromObj(value2Ptr, &length); if (TclLooksLikeInt(s2)) { /* FAILS IF NULLS */ (void) Tcl_GetLongFromObj((Tcl_Interp *) NULL, value2Ptr, &i2); } else { (void) Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, value2Ptr, &d2); } t2Ptr = value2Ptr->typePtr; } if (((t1Ptr != &tclIntType) && (t1Ptr != &tclDoubleType)) || ((t2Ptr != &tclIntType) && (t2Ptr != &tclDoubleType))) { /* * One operand is not numeric. Compare as strings. * THIS FAILS IF AN OBJECT'S STRING REP CONTAINS NULLS. */ int cmpValue; s1 = TclGetStringFromObj(valuePtr, &length); s2 = TclGetStringFromObj(value2Ptr, &length); cmpValue = strcmp(s1, s2); switch (opCode) { case INST_EQ: iResult = (cmpValue == 0); break; case INST_NEQ: iResult = (cmpValue != 0); break; case INST_LT: iResult = (cmpValue < 0); break; case INST_GT: iResult = (cmpValue > 0); break; case INST_LE: iResult = (cmpValue <= 0); break; case INST_GE: iResult = (cmpValue >= 0); break; } } else if ((t1Ptr == &tclDoubleType) || (t2Ptr == &tclDoubleType)) { /* * Compare as doubles. */ if (t1Ptr == &tclDoubleType) { d1 = valuePtr->internalRep.doubleValue; if (t2Ptr == &tclIntType) { d2 = value2Ptr->internalRep.longValue; } else { d2 = value2Ptr->internalRep.doubleValue; } } else { /* t1Ptr is int, t2Ptr is double */ d1 = valuePtr->internalRep.longValue; d2 = value2Ptr->internalRep.doubleValue; } switch (opCode) { case INST_EQ: iResult = d1 == d2; break; case INST_NEQ: iResult = d1 != d2; break; case INST_LT: iResult = d1 < d2; break; case INST_GT: iResult = d1 > d2; break; case INST_LE: iResult = d1 <= d2; break; case INST_GE: iResult = d1 >= d2; break; } } else { /* * Compare as ints. */ i = valuePtr->internalRep.longValue; i2 = value2Ptr->internalRep.longValue; switch (opCode) { case INST_EQ: iResult = i == i2; break; case INST_NEQ: iResult = i != i2; break; case INST_LT: iResult = i < i2; break; case INST_GT: iResult = i > i2; break; case INST_LE: iResult = i <= i2; break; case INST_GE: iResult = i >= i2; break; } } /* * Reuse the valuePtr object already on stack if possible. */ if (Tcl_IsShared(valuePtr)) { PUSH_OBJECT(Tcl_NewLongObj(iResult)); TRACE(("%s %.20s %.20s => %ld\n", opName[opCode], O2S(valuePtr), O2S(value2Ptr), iResult)); TclDecrRefCount(valuePtr); } else { /* reuse the valuePtr object */ TRACE(("%s %.20s %.20s => %ld\n", opName[opCode], /* NB: stack top is off by 1 */ O2S(valuePtr), O2S(value2Ptr), iResult)); Tcl_SetLongObj(valuePtr, iResult); ++stackTop; /* valuePtr now on stk top has right r.c. */ } TclDecrRefCount(value2Ptr); } ADJUST_PC(1); case INST_MOD: case INST_LSHIFT: case INST_RSHIFT: case INST_BITOR: case INST_BITXOR: case INST_BITAND: { /* * Only integers are allowed. We compute value op value2. */ long i2, rem, negative; long iResult = 0; /* Init. avoids compiler warning. */ value2Ptr = POP_OBJECT(); valuePtr = POP_OBJECT(); if (valuePtr->typePtr == &tclIntType) { i = valuePtr->internalRep.longValue; } else { /* try to convert to int */ result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); if (result != TCL_OK) { TRACE(("%s %.20s %.20s => ILLEGAL 1st TYPE %s\n", opName[opCode], O2S(valuePtr), O2S(value2Ptr), (valuePtr->typePtr? valuePtr->typePtr->name : "null"))); IllegalExprOperandType(interp, opCode, valuePtr); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } } if (value2Ptr->typePtr == &tclIntType) { i2 = value2Ptr->internalRep.longValue; } else { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, value2Ptr, &i2); if (result != TCL_OK) { TRACE(("%s %.20s %.20s => ILLEGAL 2nd TYPE %s\n", opName[opCode], O2S(valuePtr), O2S(value2Ptr), (value2Ptr->typePtr? value2Ptr->typePtr->name : "null"))); IllegalExprOperandType(interp, opCode, value2Ptr); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } } switch (opCode) { case INST_MOD: /* * This code is tricky: C doesn't guarantee much about * the quotient or remainder, but Tcl does. The * remainder always has the same sign as the divisor and * a smaller absolute value. */ if (i2 == 0) { TRACE(("mod %ld %ld => DIVIDE BY ZERO\n", i, i2)); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto divideByZero; } negative = 0; if (i2 < 0) { i2 = -i2; i = -i; negative = 1; } rem = i % i2; if (rem < 0) { rem += i2; } if (negative) { rem = -rem; } iResult = rem; break; case INST_LSHIFT: iResult = i << i2; break; case INST_RSHIFT: /* * The following code is a bit tricky: it ensures that * right shifts propagate the sign bit even on machines * where ">>" won't do it by default. */ if (i < 0) { iResult = ~((~i) >> i2); } else { iResult = i >> i2; } break; case INST_BITOR: iResult = i | i2; break; case INST_BITXOR: iResult = i ^ i2; break; case INST_BITAND: iResult = i & i2; break; } /* * Reuse the valuePtr object already on stack if possible. */ if (Tcl_IsShared(valuePtr)) { PUSH_OBJECT(Tcl_NewLongObj(iResult)); TRACE(("%s %ld %ld => %ld\n", opName[opCode], i, i2, iResult)); TclDecrRefCount(valuePtr); } else { /* reuse the valuePtr object */ TRACE(("%s %ld %ld => %ld\n", opName[opCode], i, i2, iResult)); /* NB: stack top is off by 1 */ Tcl_SetLongObj(valuePtr, iResult); ++stackTop; /* valuePtr now on stk top has right r.c. */ } TclDecrRefCount(value2Ptr); } ADJUST_PC(1); case INST_ADD: case INST_SUB: case INST_MULT: case INST_DIV: { /* * Operands must be numeric and ints get converted to floats * if necessary. We compute value op value2. */ Tcl_ObjType *t1Ptr, *t2Ptr; long i2, quot, rem; double d1, d2; long iResult = 0; /* Init. avoids compiler warning. */ double dResult = 0.0; /* Init. avoids compiler warning. */ int doDouble = 0; /* 1 if doing floating arithmetic */ value2Ptr = POP_OBJECT(); valuePtr = POP_OBJECT(); t1Ptr = valuePtr->typePtr; t2Ptr = value2Ptr->typePtr; if (t1Ptr == &tclIntType) { i = valuePtr->internalRep.longValue; } else if (t1Ptr == &tclDoubleType) { d1 = valuePtr->internalRep.doubleValue; } else { /* try to convert; FAILS IF NULLS */ char *s = Tcl_GetStringFromObj(valuePtr, &length); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d1); } if (result != TCL_OK) { TRACE(("%s %.20s %.20s => ILLEGAL 1st TYPE %s\n", opName[opCode], s, O2S(value2Ptr), (valuePtr->typePtr? valuePtr->typePtr->name : "null"))); IllegalExprOperandType(interp, opCode, valuePtr); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } t1Ptr = valuePtr->typePtr; } if (t2Ptr == &tclIntType) { i2 = value2Ptr->internalRep.longValue; } else if (t2Ptr == &tclDoubleType) { d2 = value2Ptr->internalRep.doubleValue; } else { /* try to convert; FAILS IF NULLS */ char *s = Tcl_GetStringFromObj(value2Ptr, &length); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, value2Ptr, &i2); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, value2Ptr, &d2); } if (result != TCL_OK) { TRACE(("%s %.20s %.20s => ILLEGAL 2nd TYPE %s\n", opName[opCode], O2S(valuePtr), s, (value2Ptr->typePtr? value2Ptr->typePtr->name : "null"))); IllegalExprOperandType(interp, opCode, value2Ptr); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } t2Ptr = value2Ptr->typePtr; } if ((t1Ptr == &tclDoubleType) || (t2Ptr == &tclDoubleType)) { /* * Do double arithmetic. */ doDouble = 1; if (t1Ptr == &tclIntType) { d1 = i; /* promote value 1 to double */ } else if (t2Ptr == &tclIntType) { d2 = i2; /* promote value 2 to double */ } switch (opCode) { case INST_ADD: dResult = d1 + d2; break; case INST_SUB: dResult = d1 - d2; break; case INST_MULT: dResult = d1 * d2; break; case INST_DIV: if (d2 == 0.0) { TRACE(("div %.6g %.6g => DIVIDE BY ZERO\n", d1, d2)); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto divideByZero; } dResult = d1 / d2; break; } /* * Check now for IEEE floating-point error. */ if (IS_NAN(dResult) || IS_INF(dResult)) { TRACE(("%s %.20s %.20s => IEEE FLOATING PT ERROR\n", opName[opCode], O2S(valuePtr), O2S(value2Ptr))); TclExprFloatError(interp, dResult); result = TCL_ERROR; Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto checkForCatch; } } else { /* * Do integer arithmetic. */ switch (opCode) { case INST_ADD: iResult = i + i2; break; case INST_SUB: iResult = i - i2; break; case INST_MULT: iResult = i * i2; break; case INST_DIV: /* * This code is tricky: C doesn't guarantee much * about the quotient or remainder, but Tcl does. * The remainder always has the same sign as the * divisor and a smaller absolute value. */ if (i2 == 0) { TRACE(("div %ld %ld => DIVIDE BY ZERO\n", i, i2)); Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); goto divideByZero; } if (i2 < 0) { i2 = -i2; i = -i; } quot = i / i2; rem = i % i2; if (rem < 0) { quot -= 1; } iResult = quot; break; } } /* * Reuse the valuePtr object already on stack if possible. */ if (Tcl_IsShared(valuePtr)) { if (doDouble) { PUSH_OBJECT(Tcl_NewDoubleObj(dResult)); TRACE(("%s %.6g %.6g => %.6g\n", opName[opCode], d1, d2, dResult)); } else { PUSH_OBJECT(Tcl_NewLongObj(iResult)); TRACE(("%s %ld %ld => %ld\n", opName[opCode], i, i2, iResult)); } TclDecrRefCount(valuePtr); } else { /* reuse the valuePtr object */ if (doDouble) { /* NB: stack top is off by 1 */ TRACE(("%s %.6g %.6g => %.6g\n", opName[opCode], d1, d2, dResult)); Tcl_SetDoubleObj(valuePtr, dResult); } else { TRACE(("%s %ld %ld => %ld\n", opName[opCode], i, i2, iResult)); Tcl_SetLongObj(valuePtr, iResult); } ++stackTop; /* valuePtr now on stk top has right r.c. */ } TclDecrRefCount(value2Ptr); } ADJUST_PC(1); case INST_UPLUS: { /* * Operand must be numeric. */ double d; Tcl_ObjType *tPtr; valuePtr = stackPtr[stackTop].o; tPtr = valuePtr->typePtr; if ((tPtr != &tclIntType) && (tPtr != &tclDoubleType)) { char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { /* FAILS IF NULLS */ result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s \n", opName[opCode], s, (tPtr? tPtr->name : "null"))); IllegalExprOperandType(interp, opCode, valuePtr); goto checkForCatch; } } TRACE_WITH_OBJ(("uplus %s => ", O2S(valuePtr)), valuePtr); } ADJUST_PC(1); case INST_UMINUS: case INST_LNOT: { /* * The operand must be numeric. If the operand object is * unshared modify it directly, otherwise create a copy to * modify: this is "copy on write". free any old string * representation since it is now invalid. */ double d; Tcl_ObjType *tPtr; valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if ((tPtr != &tclIntType) && (tPtr != &tclDoubleType)) { char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { /* FAILS IF NULLS */ result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { TRACE(("%s \"%.20s\" => ILLEGAL TYPE %s\n", opName[opCode], s, (tPtr? tPtr->name : "null"))); IllegalExprOperandType(interp, opCode, valuePtr); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } tPtr = valuePtr->typePtr; } if (Tcl_IsShared(valuePtr)) { /* * Create a new object. */ if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; objPtr = Tcl_NewLongObj( (opCode == INST_UMINUS)? -i : !i); TRACE_WITH_OBJ(("%s %ld => ", opName[opCode], i), objPtr); /* NB: stack top is off by 1 */ } else { d = valuePtr->internalRep.doubleValue; if (opCode == INST_UMINUS) { objPtr = Tcl_NewDoubleObj(-d); } else { /* * Should be able to use "!d", but apparently * some compilers can't handle it. */ objPtr = Tcl_NewLongObj((d==0.0)? 1 : 0); } TRACE_WITH_OBJ(("%s %.6g => ", opName[opCode], d), objPtr); /* NB: stack top is off by 1 */ } PUSH_OBJECT(objPtr); TclDecrRefCount(valuePtr); } else { /* * valuePtr is unshared. Modify it directly. */ if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; Tcl_SetLongObj(valuePtr, (opCode == INST_UMINUS)? -i : !i); TRACE_WITH_OBJ(("%s %ld => ", opName[opCode], i), valuePtr); /* NB: stack top is off by 1 */ } else { d = valuePtr->internalRep.doubleValue; if (opCode == INST_UMINUS) { Tcl_SetDoubleObj(valuePtr, -d); } else { /* * Should be able to use "!d", but apparently * some compilers can't handle it. */ Tcl_SetLongObj(valuePtr, (d==0.0)? 1 : 0); } TRACE_WITH_OBJ(("%s %.6g => ", opName[opCode], d), valuePtr); /* NB: stack top is off by 1 */ } ++stackTop; /* valuePtr now on stk top has right r.c. */ } } ADJUST_PC(1); case INST_BITNOT: { /* * The operand must be an integer. If the operand object is * unshared modify it directly, otherwise modify a copy. * Free any old string representation since it is now * invalid. */ Tcl_ObjType *tPtr; valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if (tPtr != &tclIntType) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); if (result != TCL_OK) { /* try to convert to double */ TRACE(("bitnot \"%.20s\" => ILLEGAL TYPE %s\n", O2S(valuePtr), (tPtr? tPtr->name : "null"))); IllegalExprOperandType(interp, opCode, valuePtr); Tcl_DecrRefCount(valuePtr); goto checkForCatch; } } i = valuePtr->internalRep.longValue; if (Tcl_IsShared(valuePtr)) { PUSH_OBJECT(Tcl_NewLongObj(~i)); TRACE(("bitnot 0x%lx => (%lu)\n", i, ~i)); TclDecrRefCount(valuePtr); } else { /* * valuePtr is unshared. Modify it directly. */ Tcl_SetLongObj(valuePtr, ~i); ++stackTop; /* valuePtr now on stk top has right r.c. */ TRACE(("bitnot 0x%lx => (%lu)\n", i, ~i)); } } ADJUST_PC(1); case INST_CALL_BUILTIN_FUNC1: opnd = TclGetUInt1AtPtr(pc+1); { /* * Call one of the built-in Tcl math functions. */ BuiltinFunc *mathFuncPtr; if ((opnd < 0) || (opnd > LAST_BUILTIN_FUNC)) { TRACE(("UNRECOGNIZED BUILTIN FUNC CODE %d\n", opnd)); panic("TclExecuteByteCode: unrecognized builtin function code %d", opnd); } mathFuncPtr = &(builtinFuncTable[opnd]); DECACHE_STACK_INFO(); tcl_MathInProgress++; result = (*mathFuncPtr->proc)(interp, eePtr, mathFuncPtr->clientData); tcl_MathInProgress--; CACHE_STACK_INFO(); if (result != TCL_OK) { goto checkForCatch; } TRACE_WITH_OBJ(("callBuiltinFunc1 %d => ", opnd), stackPtr[stackTop].o); } ADJUST_PC(2); case INST_CALL_FUNC1: opnd = TclGetUInt1AtPtr(pc+1); { /* * Call a non-builtin Tcl math function previously * registered by a call to Tcl_CreateMathFunc. */ int objc = opnd; /* Number of arguments. The function name * is the 0-th argument. */ Tcl_Obj **objv; /* The array of arguments. The function * name is objv[0]. */ objv = &(stackPtr[stackTop - (objc-1)].o); /* "objv[0]" */ DECACHE_STACK_INFO(); tcl_MathInProgress++; result = ExprCallMathFunc(interp, eePtr, objc, objv); tcl_MathInProgress--; CACHE_STACK_INFO(); if (result != TCL_OK) { goto checkForCatch; } TRACE_WITH_OBJ(("callFunc1 %d => ", objc), stackPtr[stackTop].o); ADJUST_PC(2); } case INST_TRY_CVT_TO_NUMERIC: { /* * Try to convert the topmost stack object to an int or * double object. This is done in order to support Tcl's * policy of interpreting operands if at all possible as * first integers, else floating-point numbers. */ double d; char *s; Tcl_ObjType *tPtr; int converted, shared; valuePtr = stackPtr[stackTop].o; tPtr = valuePtr->typePtr; converted = 0; if ((tPtr != &tclIntType) && (tPtr != &tclDoubleType)) { s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { /* FAILS IF NULLS */ result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result == TCL_OK) { converted = 1; } result = TCL_OK; /* reset the result variable */ tPtr = valuePtr->typePtr; } /* * Ensure that the topmost stack object, if numeric, has a * string rep the same as the formatted version of its * internal rep. This is used, e.g., to make sure that "expr * {0001}" yields "1", not "0001". We implement this by * _discarding_ the string rep since we know it will be * regenerated, if needed later, by formatting the internal * rep's value. Also check if there has been an IEEE * floating point error. */ if ((tPtr == &tclIntType) || (tPtr == &tclDoubleType)) { shared = 0; if (Tcl_IsShared(valuePtr)) { shared = 1; if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; objPtr = Tcl_NewLongObj(i); } else { d = valuePtr->internalRep.doubleValue; objPtr = Tcl_NewDoubleObj(d); } Tcl_IncrRefCount(objPtr); TclDecrRefCount(valuePtr); valuePtr = objPtr; tPtr = valuePtr->typePtr; } else { Tcl_InvalidateStringRep(valuePtr); } stackPtr[stackTop].o = valuePtr; if (tPtr == &tclDoubleType) { d = valuePtr->internalRep.doubleValue; if (IS_NAN(d) || IS_INF(d)) { TRACE(("tryCvtToNumeric \"%.20s\" => IEEE FLOATING PT ERROR\n", O2S(valuePtr))); TclExprFloatError(interp, d); result = TCL_ERROR; goto checkForCatch; } } shared = shared; /* lint, shared not used. */ converted = converted; /* lint, converted not used. */ TRACE(("tryCvtToNumeric \"%.20s\" => numeric, %s, %s\n", O2S(valuePtr), (converted? "converted" : "not converted"), (shared? "shared" : "not shared"))); } else { TRACE(("tryCvtToNumeric \"%.20s\" => not numeric\n", O2S(valuePtr))); } } ADJUST_PC(1); case INST_BREAK: /* * First reset the interpreter's result. Then find the closest * enclosing loop or catch exception range, if any. If a loop is * found, terminate its execution. If the closest is a catch * exception range, jump to its catchOffset. If no enclosing * range is found, stop execution and return TCL_BREAK. */ Tcl_ResetResult(interp); rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0, codePtr); if (rangePtr == NULL) { TRACE(("break => no encl. loop or catch, returning TCL_BREAK\n")); result = TCL_BREAK; goto abnormalReturn; /* no catch exists to check */ } switch (rangePtr->type) { case LOOP_EXCEPTION_RANGE: result = TCL_OK; TRACE(("break => range at %d, new pc %d\n", rangePtr->codeOffset, rangePtr->breakOffset)); break; case CATCH_EXCEPTION_RANGE: result = TCL_BREAK; TRACE(("break => ...\n")); goto processCatch; /* it will use rangePtr */ default: panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); } pc = (codePtr->codeStart + rangePtr->breakOffset); continue; /* restart outer instruction loop at pc */ case INST_CONTINUE: /* * Find the closest enclosing loop or catch exception range, * if any. If a loop is found, skip to its next iteration. * If the closest is a catch exception range, jump to its * catchOffset. If no enclosing range is found, stop * execution and return TCL_CONTINUE. */ Tcl_ResetResult(interp); rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 0, codePtr); if (rangePtr == NULL) { TRACE(("continue => no encl. loop or catch, returning TCL_CONTINUE\n")); result = TCL_CONTINUE; goto abnormalReturn; } switch (rangePtr->type) { case LOOP_EXCEPTION_RANGE: if (rangePtr->continueOffset == -1) { TRACE(("continue => loop w/o continue, checking for catch\n")); goto checkForCatch; } else { result = TCL_OK; TRACE(("continue => range at %d, new pc %d\n", rangePtr->codeOffset, rangePtr->continueOffset)); } break; case CATCH_EXCEPTION_RANGE: result = TCL_CONTINUE; TRACE(("continue => ...\n")); goto processCatch; /* it will use rangePtr */ default: panic("TclExecuteByteCode: unrecognized ExceptionRange type %d\n", rangePtr->type); } pc = (codePtr->codeStart + rangePtr->continueOffset); continue; /* restart outer instruction loop at pc */ case INST_FOREACH_START4: opnd = TclGetUInt4AtPtr(pc+1); { /* * Initialize the temporary local var that holds the count * of the number of iterations of the loop body to -1. */ ForeachInfo *infoPtr = (ForeachInfo *) codePtr->auxDataArrayPtr[opnd].clientData; int iterTmpIndex = infoPtr->loopIterNumTmp; CallFrame *varFramePtr = iPtr->varFramePtr; Var *compiledLocals = varFramePtr->compiledLocals; Var *iterVarPtr; Tcl_Obj *oldValuePtr; iterVarPtr = &(compiledLocals[iterTmpIndex]); oldValuePtr = iterVarPtr->value.objPtr; if (oldValuePtr == NULL) { iterVarPtr->value.objPtr = Tcl_NewLongObj(-1); Tcl_IncrRefCount(iterVarPtr->value.objPtr); } else { Tcl_SetLongObj(oldValuePtr, -1); } TclSetVarScalar(iterVarPtr); TclClearVarUndefined(iterVarPtr); TRACE(("foreach_start4 %u => loop iter count temp %d\n", opnd, iterTmpIndex)); } ADJUST_PC(5); case INST_FOREACH_STEP4: opnd = TclGetUInt4AtPtr(pc+1); { /* * "Step" a foreach loop (i.e., begin its next iteration) by * assigning the next value list element to each loop var. */ ForeachInfo *infoPtr = (ForeachInfo *) codePtr->auxDataArrayPtr[opnd].clientData; ForeachVarList *varListPtr; int numLists = infoPtr->numLists; int iterTmpIndex = infoPtr->loopIterNumTmp; CallFrame *varFramePtr = iPtr->varFramePtr; Var *compiledLocals = varFramePtr->compiledLocals; int iterNum, listTmpIndex, listLen, numVars; int varIndex, valIndex, j; Tcl_Obj *listPtr, *elemPtr, *oldValuePtr; List *listRepPtr; Var *iterVarPtr, *listVarPtr; int continueLoop = 0; /* * Increment the temp holding the loop iteration number. */ iterVarPtr = &(compiledLocals[iterTmpIndex]); oldValuePtr = iterVarPtr->value.objPtr; iterNum = (oldValuePtr->internalRep.longValue + 1); Tcl_SetLongObj(oldValuePtr, iterNum); /* * Check whether all value lists are exhausted and we should * stop the loop. */ listTmpIndex = infoPtr->firstListTmp; for (i = 0; i < numLists; i++) { varListPtr = infoPtr->varLists[i]; numVars = varListPtr->numVars; listVarPtr = &(compiledLocals[listTmpIndex]); listPtr = listVarPtr->value.objPtr; result = Tcl_ListObjLength(interp, listPtr, &listLen); if (result != TCL_OK) { TRACE_WITH_OBJ(("foreach_step4 %u => ERROR converting list %ld, \"%s\": ", opnd, i, O2S(listPtr)), Tcl_GetObjResult(interp)); goto checkForCatch; } if (listLen > (iterNum * numVars)) { continueLoop = 1; } listTmpIndex++; } /* * If some var in some var list still has a remaining list * element iterate one more time. Assign to var the next * element from its value list. We already checked above * that each list temp holds a valid list object. */ if (continueLoop) { listTmpIndex = infoPtr->firstListTmp; for (i = 0; i < numLists; i++) { varListPtr = infoPtr->varLists[i]; numVars = varListPtr->numVars; listVarPtr = &(compiledLocals[listTmpIndex]); listPtr = listVarPtr->value.objPtr; listRepPtr = (List *) listPtr->internalRep.otherValuePtr; listLen = listRepPtr->elemCount; valIndex = (iterNum * numVars); for (j = 0; j < numVars; j++) { int setEmptyStr = 0; if (valIndex >= listLen) { setEmptyStr = 1; elemPtr = Tcl_NewObj(); } else { elemPtr = listRepPtr->elements[valIndex]; } varIndex = varListPtr->varIndexes[j]; DECACHE_STACK_INFO(); value2Ptr = TclSetIndexedScalar(interp, varIndex, elemPtr, /*leaveErrorMsg*/ 1); CACHE_STACK_INFO(); if (value2Ptr == NULL) { TRACE_WITH_OBJ(("foreach_step4 %u => ERROR init. index temp %d: ", opnd, varIndex), Tcl_GetObjResult(interp)); if (setEmptyStr) { Tcl_DecrRefCount(elemPtr); /* unneeded */ } result = TCL_ERROR; goto checkForCatch; } valIndex++; } listTmpIndex++; } } /* * Now push a "1" object if at least one value list had a * remaining element and the loop should continue. * Otherwise push "0". */ PUSH_OBJECT(Tcl_NewLongObj(continueLoop)); TRACE(("foreach_step4 %u => %d lists, iter %d, %s loop\n", opnd, numLists, iterNum, (continueLoop? "continue" : "exit"))); } ADJUST_PC(5); case INST_BEGIN_CATCH4: /* * Record start of the catch command with exception range index * equal to the operand. Push the current stack depth onto the * special catch stack. */ catchStackPtr[++catchTop] = stackTop; TRACE(("beginCatch4 %u => catchTop=%d, stackTop=%d\n", TclGetUInt4AtPtr(pc+1), catchTop, stackTop)); ADJUST_PC(5); case INST_END_CATCH: catchTop--; result = TCL_OK; TRACE(("endCatch => catchTop=%d\n", catchTop)); ADJUST_PC(1); case INST_PUSH_RESULT: PUSH_OBJECT(Tcl_GetObjResult(interp)); TRACE_WITH_OBJ(("pushResult => "), Tcl_GetObjResult(interp)); ADJUST_PC(1); case INST_PUSH_RETURN_CODE: PUSH_OBJECT(Tcl_NewLongObj(result)); TRACE(("pushReturnCode => %u\n", result)); ADJUST_PC(1); default: TRACE(("UNRECOGNIZED INSTRUCTION %u\n", opCode)); panic("TclExecuteByteCode: unrecognized opCode %u", opCode); } /* end of switch on opCode */ /* * Division by zero in an expression. Control only reaches this * point by "goto divideByZero". */ divideByZero: Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "divide by zero", -1); Tcl_SetErrorCode(interp, "ARITH", "DIVZERO", "divide by zero", (char *) NULL); result = TCL_ERROR; /* * Execution has generated an "exception" such as TCL_ERROR. If the * exception is an error, record information about what was being * executed when the error occurred. Find the closest enclosing * catch range, if any. If no enclosing catch range is found, stop * execution and return the "exception" code. */ checkForCatch: if ((result == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) { RecordTracebackInfo(interp, pc, codePtr); } rangePtr = TclGetExceptionRangeForPc(pc, /*catchOnly*/ 1, codePtr); if (rangePtr == NULL) { TRACE((" ... no enclosing catch, returning %s\n", StringForResultCode(result))); goto abnormalReturn; } /* * A catch exception range (rangePtr) was found to handle an * "exception". It was found either by checkForCatch just above or * by an instruction during break, continue, or error processing. * Jump to its catchOffset after unwinding the operand stack to * the depth it had when starting to execute the range's catch * command. */ processCatch: while (stackTop > catchStackPtr[catchTop]) { valuePtr = POP_OBJECT(); TclDecrRefCount(valuePtr); } TRACE((" ... found catch at %d, catchTop=%d, unwound to %d, new pc %u\n", rangePtr->codeOffset, catchTop, catchStackPtr[catchTop], (unsigned int)(rangePtr->catchOffset))); pc = (codePtr->codeStart + rangePtr->catchOffset); continue; /* restart the execution loop at pc */ } /* end of infinite loop dispatching on instructions */ /* * Abnormal return code. Restore the stack to state it had when starting * to execute the ByteCode. */ abnormalReturn: while (stackTop > initStackTop) { valuePtr = POP_OBJECT(); Tcl_DecrRefCount(valuePtr); } /* * Free the catch stack array if malloc'ed storage was used. */ done: if (catchStackPtr != catchStackStorage) { ckfree((char *) catchStackPtr); } eePtr->stackTop = initStackTop; return result; #undef STATIC_CATCH_STACK_SIZE } /* *---------------------------------------------------------------------- * * PrintByteCodeInfo -- * * This procedure prints a summary about a bytecode object to stdout. * It is called by TclExecuteByteCode when starting to execute the * bytecode object if tclTraceExec has the value 2 or more. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ static void PrintByteCodeInfo(codePtr) register ByteCode *codePtr; /* The bytecode whose summary is printed * to stdout. */ { Proc *procPtr = codePtr->procPtr; int numCmds = codePtr->numCommands; int numObjs = codePtr->numObjects; int objBytes, i; objBytes = (numObjs * sizeof(Tcl_Obj)); for (i = 0; i < numObjs; i++) { Tcl_Obj *litObjPtr = codePtr->objArrayPtr[i]; if (litObjPtr->bytes != NULL) { objBytes += litObjPtr->length; } } fprintf(stdout, "\nExecuting ByteCode 0x%x, ref ct %u, epoch %u, interp 0x%x(epoch %u)\n", (unsigned int) codePtr, codePtr->refCount, codePtr->compileEpoch, (unsigned int) codePtr->iPtr, codePtr->iPtr->compileEpoch); fprintf(stdout, " Source: "); TclPrintSource(stdout, codePtr->source, 70); fprintf(stdout, "\n Cmds %d, chars %d, inst %u, objs %u, aux %d, stk depth %u, code/src %.2fn", numCmds, codePtr->numSrcChars, codePtr->numCodeBytes, numObjs, codePtr->numAuxDataItems, codePtr->maxStackDepth, (codePtr->numSrcChars? ((float)codePtr->totalSize)/((float)codePtr->numSrcChars) : 0.0)); fprintf(stdout, " Code %zu = %u(header)+%d(inst)+%d(objs)+%u(exc)+%u(aux)+%d(cmd map)\n", codePtr->totalSize, sizeof(ByteCode), codePtr->numCodeBytes, objBytes, (codePtr->numExcRanges * sizeof(ExceptionRange)), (codePtr->numAuxDataItems * sizeof(AuxData)), codePtr->numCmdLocBytes); if (procPtr != NULL) { fprintf(stdout, " Proc 0x%x, ref ct %d, args %d, compiled locals %d\n", (unsigned int) procPtr, procPtr->refCount, procPtr->numArgs, procPtr->numCompiledLocals); } } /* *---------------------------------------------------------------------- * * ValidatePcAndStackTop -- * * This procedure is called by TclExecuteByteCode when debugging to * verify that the program counter and stack top are valid during * execution. * * Results: * None. * * Side effects: * Prints a message to stderr and panics if either the pc or stack * top are invalid. * *---------------------------------------------------------------------- */ #ifdef TCL_COMPILE_DEBUG static void ValidatePcAndStackTop(codePtr, pc, stackTop, stackLowerBound, stackUpperBound) register ByteCode *codePtr; /* The bytecode whose summary is printed * to stdout. */ unsigned char *pc; /* Points to first byte of a bytecode * instruction. The program counter. */ int stackTop; /* Current stack top. Must be between * stackLowerBound and stackUpperBound * (inclusive). */ int stackLowerBound; /* Smallest legal value for stackTop. */ int stackUpperBound; /* Greatest legal value for stackTop. */ { unsigned int relativePc = (unsigned int) (pc - codePtr->codeStart); unsigned int codeStart = (unsigned int) codePtr->codeStart; unsigned int codeEnd = (unsigned int) (codePtr->codeStart + codePtr->numCodeBytes); unsigned char opCode = *pc; if (((unsigned int) pc < codeStart) || ((unsigned int) pc > codeEnd)) { fprintf(stderr, "\nBad instruction pc 0x%x in TclExecuteByteCode\n", (unsigned int) pc); panic("TclExecuteByteCode execution failure: bad pc"); } if ((unsigned int) opCode > LAST_INST_OPCODE) { fprintf(stderr, "\nBad opcode %d at pc %u in TclExecuteByteCode\n", (unsigned int) opCode, relativePc); panic("TclExecuteByteCode execution failure: bad opcode"); } if ((stackTop < stackLowerBound) || (stackTop > stackUpperBound)) { int numChars; char *cmd = GetSrcInfoForPc(pc, codePtr, &numChars); char *ellipsis = ""; fprintf(stderr, "\nBad stack top %d at pc %u in TclExecuteByteCode", stackTop, relativePc); if (cmd != NULL) { if (numChars > 100) { numChars = 100; ellipsis = "..."; } fprintf(stderr, "\n executing %.*s%s\n", numChars, cmd, ellipsis); } else { fprintf(stderr, "\n"); } panic("TclExecuteByteCode execution failure: bad stack top"); } } #endif /* TCL_COMPILE_DEBUG */ /* *---------------------------------------------------------------------- * * IllegalExprOperandType -- * * Used by TclExecuteByteCode to add an error message to errorInfo * when an illegal operand type is detected by an expression * instruction. The argument opCode holds the failing instruction's * opcode and opndPtr holds the operand object in error. * * Results: * None. * * Side effects: * An error message is appended to errorInfo. * *---------------------------------------------------------------------- */ static void IllegalExprOperandType(interp, opCode, opndPtr) Tcl_Interp *interp; /* Interpreter to which error information * pertains. */ unsigned int opCode; /* The instruction opcode being executed * when the illegal type was found. */ Tcl_Obj *opndPtr; /* Points to the operand holding the value * with the illegal type. */ { Tcl_ResetResult(interp); if ((opndPtr->bytes == NULL) || (opndPtr->length == 0)) { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "can't use empty string as operand of \"", operatorStrings[opCode - INST_LOR], "\"", (char *) NULL); } else { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "can't use ", ((opndPtr->typePtr == &tclDoubleType) ? "floating-point value" : "non-numeric string"), " as operand of \"", operatorStrings[opCode - INST_LOR], "\"", (char *) NULL); } } /* *---------------------------------------------------------------------- * * CallTraceProcedure -- * * Invokes a trace procedure registered with an interpreter. These * procedures trace command execution. Currently this trace procedure * is called with the address of the string-based Tcl_CmdProc for the * command, not the Tcl_ObjCmdProc. * * Results: * None. * * Side effects: * Those side effects made by the trace procedure. * *---------------------------------------------------------------------- */ static void CallTraceProcedure(interp, tracePtr, cmdPtr, command, numChars, objc, objv) Tcl_Interp *interp; /* The current interpreter. */ register Trace *tracePtr; /* Describes the trace procedure to call. */ Command *cmdPtr; /* Points to command's Command struct. */ char *command; /* Points to the first character of the * command's source before substitutions. */ int numChars; /* The number of characters in the * command's source. */ register int objc; /* Number of arguments for the command. */ Tcl_Obj *objv[]; /* Pointers to Tcl_Obj of each argument. */ { Interp *iPtr = (Interp *) interp; register char **argv; register int i; int length; char *p; /* * Get the string rep from the objv argument objects and place their * pointers in argv. First make sure argv is large enough to hold the * objc args plus 1 extra word for the zero end-of-argv word. * THIS FAILS IF AN OBJECT'S STRING REP CONTAINS NULLS. */ argv = (char **) ckalloc((unsigned)(objc + 1) * sizeof(char *)); for (i = 0; i < objc; i++) { argv[i] = Tcl_GetStringFromObj(objv[i], &length); } argv[objc] = 0; /* * Copy the command characters into a new string. */ p = (char *) ckalloc((unsigned) (numChars + 1)); memcpy((VOID *) p, (VOID *) command, (size_t) numChars); p[numChars] = '\0'; /* * Call the trace procedure then free allocated storage. */ (*tracePtr->proc)(tracePtr->clientData, interp, iPtr->numLevels, p, cmdPtr->proc, cmdPtr->clientData, objc, argv); ckfree((char *) argv); ckfree((char *) p); } /* *---------------------------------------------------------------------- * * RecordTracebackInfo -- * * Procedure called by TclExecuteByteCode to record information * about what was being executed when the error occurred. * * Results: * None. * * Side effects: * Appends information about the command being executed to the * "errorInfo" variable. Sets the errorLine field in the interpreter * to the line number of that command. Sets the ERR_ALREADY_LOGGED * bit in the interpreter's execution flags. * *---------------------------------------------------------------------- */ static void RecordTracebackInfo(interp, pc, codePtr) Tcl_Interp *interp; /* The interpreter in which the error * occurred. */ unsigned char *pc; /* The program counter value where the error * occurred. This points to a bytecode * instruction in codePtr's code. */ ByteCode *codePtr; /* The bytecode sequence being executed. */ { register Interp *iPtr = (Interp *) interp; char *cmd, *ellipsis; char buf[200]; register char *p; int numChars; /* * Record the command in errorInfo (up to a certain number of * characters, or up to the first newline). */ iPtr->errorLine = 1; cmd = GetSrcInfoForPc(pc, codePtr, &numChars); if (cmd != NULL) { for (p = codePtr->source; p != cmd; p++) { if (*p == '\n') { iPtr->errorLine++; } } for ( ; (isspace(UCHAR(*p)) || (*p == ';')); p++) { if (*p == '\n') { iPtr->errorLine++; } } ellipsis = ""; if (numChars > 150) { numChars = 150; ellipsis = "..."; } if (!(iPtr->flags & ERR_IN_PROGRESS)) { sprintf(buf, "\n while executing\n\"%.*s%s\"", numChars, cmd, ellipsis); } else { sprintf(buf, "\n invoked from within\n\"%.*s%s\"", numChars, cmd, ellipsis); } Tcl_AddObjErrorInfo(interp, buf, -1); iPtr->flags |= ERR_ALREADY_LOGGED; } } /* *---------------------------------------------------------------------- * * GetSrcInfoForPc -- * * Given a program counter value, finds the closest command in the * bytecode code unit's CmdLocation array and returns information about * that command's source: a pointer to its first byte and the number of * characters. * * Results: * If a command is found that encloses the program counter value, a * pointer to the command's source is returned and the length of the * source is stored at *lengthPtr. If multiple commands resulted in * code at pc, information about the closest enclosing command is * returned. If no matching command is found, NULL is returned and * *lengthPtr is unchanged. * * Side effects: * None. * *---------------------------------------------------------------------- */ static char * GetSrcInfoForPc(pc, codePtr, lengthPtr) unsigned char *pc; /* The program counter value for which to * return the closest command's source info. * This points to a bytecode instruction * in codePtr's code. */ ByteCode *codePtr; /* The bytecode sequence in which to look * up the command source for the pc. */ int *lengthPtr; /* If non-NULL, the location where the * length of the command's source should be * stored. If NULL, no length is stored. */ { register int pcOffset = (pc - codePtr->codeStart); int numCmds = codePtr->numCommands; unsigned char *codeDeltaNext, *codeLengthNext; unsigned char *srcDeltaNext, *srcLengthNext; int codeOffset, codeLen, codeEnd, srcOffset, srcLen, delta, i; int bestDist = INT_MAX; /* Distance of pc to best cmd's start pc. */ int bestSrcOffset = -1; /* Initialized to avoid compiler warning. */ int bestSrcLength = -1; /* Initialized to avoid compiler warning. */ if ((pcOffset < 0) || (pcOffset >= codePtr->numCodeBytes)) { return NULL; } /* * Decode the code and source offset and length for each command. The * closest enclosing command is the last one whose code started before * pcOffset. */ codeDeltaNext = codePtr->codeDeltaStart; codeLengthNext = codePtr->codeLengthStart; srcDeltaNext = codePtr->srcDeltaStart; srcLengthNext = codePtr->srcLengthStart; codeOffset = srcOffset = 0; for (i = 0; i < numCmds; i++) { if ((unsigned int) (*codeDeltaNext) == (unsigned int) 0xFF) { codeDeltaNext++; delta = TclGetInt4AtPtr(codeDeltaNext); codeDeltaNext += 4; } else { delta = TclGetInt1AtPtr(codeDeltaNext); codeDeltaNext++; } codeOffset += delta; if ((unsigned int) (*codeLengthNext) == (unsigned int) 0xFF) { codeLengthNext++; codeLen = TclGetInt4AtPtr(codeLengthNext); codeLengthNext += 4; } else { codeLen = TclGetInt1AtPtr(codeLengthNext); codeLengthNext++; } codeEnd = (codeOffset + codeLen - 1); if ((unsigned int) (*srcDeltaNext) == (unsigned int) 0xFF) { srcDeltaNext++; delta = TclGetInt4AtPtr(srcDeltaNext); srcDeltaNext += 4; } else { delta = TclGetInt1AtPtr(srcDeltaNext); srcDeltaNext++; } srcOffset += delta; if ((unsigned int) (*srcLengthNext) == (unsigned int) 0xFF) { srcLengthNext++; srcLen = TclGetInt4AtPtr(srcLengthNext); srcLengthNext += 4; } else { srcLen = TclGetInt1AtPtr(srcLengthNext); srcLengthNext++; } if (codeOffset > pcOffset) { /* best cmd already found */ break; } else if (pcOffset <= codeEnd) { /* this cmd's code encloses pc */ int dist = (pcOffset - codeOffset); if (dist <= bestDist) { bestDist = dist; bestSrcOffset = srcOffset; bestSrcLength = srcLen; } } } if (bestDist == INT_MAX) { return NULL; } if (lengthPtr != NULL) { *lengthPtr = bestSrcLength; } return (codePtr->source + bestSrcOffset); } /* *---------------------------------------------------------------------- * * TclGetExceptionRangeForPc -- * * Procedure that given a program counter value, returns the closest * enclosing ExceptionRange that matches the kind requested. * * Results: * In the normal case, catchOnly is 0 (false) and this procedure * returns a pointer to the most closely enclosing ExceptionRange * structure regardless of whether it is a loop or catch exception * range. This is appropriate when processing a TCL_BREAK or * TCL_CONTINUE, which will be "handled" either by a loop exception * range or a closer catch range. If catchOnly is nonzero (true), this * procedure ignores loop exception ranges and returns a pointer to the * closest catch range. If no matching ExceptionRange is found that * encloses pc, a NULL is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ ExceptionRange * TclGetExceptionRangeForPc(pc, catchOnly, codePtr) unsigned char *pc; /* The program counter value for which to * search for a closest enclosing exception * range. This points to a bytecode * instruction in codePtr's code. */ int catchOnly; /* If 0, consider either loop or catch * ExceptionRanges in search. Otherwise * consider only catch ranges (and ignore * any closer loop ranges). */ ByteCode* codePtr; /* Points to the ByteCode in which to search * for the enclosing ExceptionRange. */ { ExceptionRange *rangeArrayPtr; int numRanges = codePtr->numExcRanges; register ExceptionRange *rangePtr; int codeOffset = (pc - codePtr->codeStart); register int i, level; if (numRanges == 0) { return NULL; } rangeArrayPtr = codePtr->excRangeArrayPtr; for (level = codePtr->maxExcRangeDepth; level >= 0; level--) { for (i = 0; i < numRanges; i++) { rangePtr = &(rangeArrayPtr[i]); if (rangePtr->nestingLevel == level) { int start = rangePtr->codeOffset; int end = (start + rangePtr->numCodeBytes); if ((start <= codeOffset) && (codeOffset < end)) { if ((!catchOnly) || (rangePtr->type == CATCH_EXCEPTION_RANGE)) { return rangePtr; } } } } } return NULL; } /* *---------------------------------------------------------------------- * * Math Functions -- * * This page contains the procedures that implement all of the * built-in math functions for expressions. * * Results: * Each procedure returns TCL_OK if it succeeds and pushes an * Tcl object holding the result. If it fails it returns TCL_ERROR * and leaves an error message in the interpreter's result. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int ExprUnaryFunc(interp, eePtr, clientData) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ ClientData clientData; /* Contains the address of a procedure that * takes one double argument and returns a * double result. */ { StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ register Tcl_Obj *valuePtr; Tcl_ObjType *tPtr; double d, dResult; long i; int result = TCL_OK; double (*func) _ANSI_ARGS_((double)) = (double (*)_ANSI_ARGS_((double))) clientData; /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Pop the function's argument from the evaluation stack. Convert it * to a double if necessary. */ valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if (tPtr == &tclIntType) { d = (double) valuePtr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d = valuePtr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); d = (double) valuePtr->internalRep.longValue; } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } } errno = 0; dResult = (*func)(d); if ((errno != 0) || IS_NAN(dResult) || IS_INF(dResult)) { TclExprFloatError(interp, dResult); result = TCL_ERROR; goto done; } /* * Push a Tcl object holding the result. */ PUSH_OBJECT(Tcl_NewDoubleObj(dResult)); /* * Reflect the change to stackTop back in eePtr. */ done: Tcl_DecrRefCount(valuePtr); DECACHE_STACK_INFO(); return result; } static int ExprBinaryFunc(interp, eePtr, clientData) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ ClientData clientData; /* Contains the address of a procedure that * takes two double arguments and * returns a double result. */ { StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ register Tcl_Obj *valuePtr, *value2Ptr; Tcl_ObjType *tPtr; double d1, d2, dResult; long i; char *s; int result = TCL_OK; double (*func) _ANSI_ARGS_((double, double)) = (double (*)_ANSI_ARGS_((double, double))) clientData; /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Pop the function's two arguments from the evaluation stack. Convert * them to doubles if necessary. */ value2Ptr = POP_OBJECT(); valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if (tPtr == &tclIntType) { d1 = (double) valuePtr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d1 = valuePtr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); d1 = (double) valuePtr->internalRep.longValue; } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d1); } if (result != TCL_OK) { badArg: Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } } tPtr = value2Ptr->typePtr; if (tPtr == &tclIntType) { d2 = value2Ptr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d2 = value2Ptr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ s = Tcl_GetStringFromObj(value2Ptr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, value2Ptr, &i); d2 = (double) value2Ptr->internalRep.longValue; } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, value2Ptr, &d2); } if (result != TCL_OK) { goto badArg; } } errno = 0; dResult = (*func)(d1, d2); if ((errno != 0) || IS_NAN(dResult) || IS_INF(dResult)) { TclExprFloatError(interp, dResult); result = TCL_ERROR; goto done; } /* * Push a Tcl object holding the result. */ PUSH_OBJECT(Tcl_NewDoubleObj(dResult)); /* * Reflect the change to stackTop back in eePtr. */ done: Tcl_DecrRefCount(valuePtr); Tcl_DecrRefCount(value2Ptr); DECACHE_STACK_INFO(); return result; } static int ExprAbsFunc(interp, eePtr, clientData) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ ClientData clientData; /* Ignored. */ { StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ register Tcl_Obj *valuePtr; Tcl_ObjType *tPtr; long i, iResult; double d, dResult; int result = TCL_OK; /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Pop the argument from the evaluation stack. */ valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d = valuePtr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } tPtr = valuePtr->typePtr; } /* * Push a Tcl object with the result. */ if (tPtr == &tclIntType) { if (i < 0) { iResult = -i; if (iResult < 0) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "integer value too large to represent", -1); Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", "integer value too large to represent", (char *) NULL); result = TCL_ERROR; goto done; } } else { iResult = i; } PUSH_OBJECT(Tcl_NewLongObj(iResult)); } else { if (d < 0.0) { dResult = -d; } else { dResult = d; } if (IS_NAN(dResult) || IS_INF(dResult)) { TclExprFloatError(interp, dResult); result = TCL_ERROR; goto done; } PUSH_OBJECT(Tcl_NewDoubleObj(dResult)); } /* * Reflect the change to stackTop back in eePtr. */ done: Tcl_DecrRefCount(valuePtr); DECACHE_STACK_INFO(); return result; } static int ExprDoubleFunc(interp, eePtr, clientData) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ ClientData clientData; /* Ignored. */ { StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ register Tcl_Obj *valuePtr; double dResult; long i; int result = TCL_OK; /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Pop the argument from the evaluation stack. */ valuePtr = POP_OBJECT(); if (valuePtr->typePtr == &tclIntType) { dResult = (double) valuePtr->internalRep.longValue; } else if (valuePtr->typePtr == &tclDoubleType) { dResult = valuePtr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); dResult = (double) valuePtr->internalRep.longValue; } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &dResult); } if (result != TCL_OK) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } } /* * Push a Tcl object with the result. */ PUSH_OBJECT(Tcl_NewDoubleObj(dResult)); /* * Reflect the change to stackTop back in eePtr. */ done: Tcl_DecrRefCount(valuePtr); DECACHE_STACK_INFO(); return result; } static int ExprIntFunc(interp, eePtr, clientData) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ ClientData clientData; /* Ignored. */ { StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ register Tcl_Obj *valuePtr; Tcl_ObjType *tPtr; long i = 0; /* Initialized to avoid compiler warning. */ long iResult; double d; int result = TCL_OK; /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Pop the argument from the evaluation stack. */ valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d = valuePtr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } tPtr = valuePtr->typePtr; } /* * Push a Tcl object with the result. */ if (tPtr == &tclIntType) { iResult = i; } else { if (d < 0.0) { if (d < (double) (long) LONG_MIN) { tooLarge: Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "integer value too large to represent", -1); Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", "integer value too large to represent", (char *) NULL); result = TCL_ERROR; goto done; } } else { if (d > (double) LONG_MAX) { goto tooLarge; } } if (IS_NAN(d) || IS_INF(d)) { TclExprFloatError(interp, d); result = TCL_ERROR; goto done; } iResult = (long) d; } PUSH_OBJECT(Tcl_NewLongObj(iResult)); /* * Reflect the change to stackTop back in eePtr. */ done: Tcl_DecrRefCount(valuePtr); DECACHE_STACK_INFO(); return result; } static int ExprRoundFunc(interp, eePtr, clientData) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ ClientData clientData; /* Ignored. */ { StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ Tcl_Obj *valuePtr; Tcl_ObjType *tPtr; long i = 0; /* Initialized to avoid compiler warning. */ long iResult; double d, temp; int result = TCL_OK; /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Pop the argument from the evaluation stack. */ valuePtr = POP_OBJECT(); tPtr = valuePtr->typePtr; if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d = valuePtr->internalRep.doubleValue; } else { /* FAILS IF STRING REP HAS NULLS */ char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } tPtr = valuePtr->typePtr; } /* * Push a Tcl object with the result. */ if (tPtr == &tclIntType) { iResult = i; } else { if (d < 0.0) { if (d <= (((double) (long) LONG_MIN) - 0.5)) { tooLarge: Tcl_ResetResult(interp); Tcl_AppendToObj(Tcl_GetObjResult(interp), "integer value too large to represent", -1); Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW", "integer value too large to represent", (char *) NULL); result = TCL_ERROR; goto done; } temp = (long) (d - 0.5); } else { if (d >= (((double) LONG_MAX + 0.5))) { goto tooLarge; } temp = (long) (d + 0.5); } if (IS_NAN(temp) || IS_INF(temp)) { TclExprFloatError(interp, temp); result = TCL_ERROR; goto done; } iResult = (long) temp; } PUSH_OBJECT(Tcl_NewLongObj(iResult)); /* * Reflect the change to stackTop back in eePtr. */ done: Tcl_DecrRefCount(valuePtr); DECACHE_STACK_INFO(); return result; } /* *---------------------------------------------------------------------- * * ExprCallMathFunc -- * * This procedure is invoked to call a non-builtin math function * during the execution of an expression. * * Results: * TCL_OK is returned if all went well and the function's value * was computed successfully. If an error occurred, TCL_ERROR * is returned and an error message is left in the interpreter's * result. After a successful return this procedure pushes a Tcl object * holding the result. * * Side effects: * None, unless the called math function has side effects. * *---------------------------------------------------------------------- */ static int ExprCallMathFunc(interp, eePtr, objc, objv) Tcl_Interp *interp; /* The interpreter in which to execute the * function. */ ExecEnv *eePtr; /* Points to the environment for executing * the function. */ int objc; /* Number of arguments. The function name is * the 0-th argument. */ Tcl_Obj **objv; /* The array of arguments. The function name * is objv[0]. */ { Interp *iPtr = (Interp *) interp; StackItem *stackPtr; /* Cached evaluation stack base pointer. */ register int stackTop; /* Cached top index of evaluation stack. */ char *funcName; Tcl_HashEntry *hPtr; MathFunc *mathFuncPtr; /* Information about math function. */ Tcl_Value args[MAX_MATH_ARGS]; /* Arguments for function call. */ Tcl_Value funcResult; /* Result of function call as Tcl_Value. */ register Tcl_Obj *valuePtr; Tcl_ObjType *tPtr; long i; double d; int j, k, result; Tcl_ResetResult(interp); /* * Set stackPtr and stackTop from eePtr. */ CACHE_STACK_INFO(); /* * Look up the MathFunc record for the function. * THIS FAILS IF THE OBJECT'S STRING REP CONTAINS NULLS. */ funcName = Tcl_GetStringFromObj(objv[0], (int *) NULL); hPtr = Tcl_FindHashEntry(&iPtr->mathFuncTable, funcName); if (hPtr == NULL) { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "unknown math function \"", funcName, "\"", (char *) NULL); result = TCL_ERROR; goto done; } mathFuncPtr = (MathFunc *) Tcl_GetHashValue(hPtr); if (mathFuncPtr->numArgs != (objc-1)) { panic("ExprCallMathFunc: expected number of args %d != actual number %d", mathFuncPtr->numArgs, objc); result = TCL_ERROR; goto done; } /* * Collect the arguments for the function, if there are any, into the * array "args". Note that args[0] will have the Tcl_Value that * corresponds to objv[1]. */ for (j = 1, k = 0; j < objc; j++, k++) { valuePtr = objv[j]; tPtr = valuePtr->typePtr; if (tPtr == &tclIntType) { i = valuePtr->internalRep.longValue; } else if (tPtr == &tclDoubleType) { d = valuePtr->internalRep.doubleValue; } else { /* * Try to convert to int first then double. * FAILS IF STRING REP HAS NULLS. */ char *s = Tcl_GetStringFromObj(valuePtr, (int *) NULL); if (TclLooksLikeInt(s)) { result = Tcl_GetLongFromObj((Tcl_Interp *) NULL, valuePtr, &i); } else { result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, valuePtr, &d); } if (result != TCL_OK) { Tcl_AppendToObj(Tcl_GetObjResult(interp), "argument to math function didn't have numeric value", -1); goto done; } tPtr = valuePtr->typePtr; } /* * Copy the object's numeric value to the argument record, * converting it if necessary. */ if (tPtr == &tclIntType) { if (mathFuncPtr->argTypes[k] == TCL_DOUBLE) { args[k].type = TCL_DOUBLE; args[k].doubleValue = i; } else { args[k].type = TCL_INT; args[k].intValue = i; } } else { if (mathFuncPtr->argTypes[k] == TCL_INT) { args[k].type = TCL_INT; args[k].intValue = (long) d; } else { args[k].type = TCL_DOUBLE; args[k].doubleValue = d; } } } /* * Invoke the function and copy its result back into valuePtr. */ tcl_MathInProgress++; result = (*mathFuncPtr->proc)(mathFuncPtr->clientData, interp, args, &funcResult); tcl_MathInProgress--; if (result != TCL_OK) { goto done; } /* * Pop the objc top stack elements and decrement their ref counts. */ i = (stackTop - (objc-1)); while (i <= stackTop) { valuePtr = stackPtr[i].o; Tcl_DecrRefCount(valuePtr); i++; } stackTop -= objc; /* * Push the call's object result. */ if (funcResult.type == TCL_INT) { PUSH_OBJECT(Tcl_NewLongObj(funcResult.intValue)); } else { d = funcResult.doubleValue; if (IS_NAN(d) || IS_INF(d)) { TclExprFloatError(interp, d); result = TCL_ERROR; goto done; } PUSH_OBJECT(Tcl_NewDoubleObj(d)); } /* * Reflect the change to stackTop back in eePtr. */ done: DECACHE_STACK_INFO(); return result; } /* *---------------------------------------------------------------------- * * TclExprFloatError -- * * This procedure is called when an error occurs during a * floating-point operation. It reads errno and sets * interp->objResultPtr accordingly. * * Results: * interp->objResultPtr is set to hold an error message. * * Side effects: * None. * *---------------------------------------------------------------------- */ void TclExprFloatError(interp, value) Tcl_Interp *interp; /* Where to store error message. */ double value; /* Value returned after error; used to * distinguish underflows from overflows. */ { char *s; Tcl_ResetResult(interp); if ((errno == EDOM) || (value != value)) { s = "domain error: argument not in valid range"; Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1); Tcl_SetErrorCode(interp, "ARITH", "DOMAIN", s, (char *) NULL); } else if ((errno == ERANGE) || IS_INF(value)) { if (value == 0.0) { s = "floating-point value too small to represent"; Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1); Tcl_SetErrorCode(interp, "ARITH", "UNDERFLOW", s, (char *) NULL); } else { s = "floating-point value too large to represent"; Tcl_AppendToObj(Tcl_GetObjResult(interp), s, -1); Tcl_SetErrorCode(interp, "ARITH", "OVERFLOW", s, (char *) NULL); } } else { /* FAILS IF STRING REP CONTAINS NULLS */ char msg[100]; sprintf(msg, "unknown floating-point error, errno = %d", errno); Tcl_AppendToObj(Tcl_GetObjResult(interp), msg, -1); Tcl_SetErrorCode(interp, "ARITH", "UNKNOWN", msg, (char *) NULL); } } #ifdef TCL_COMPILE_STATS /* *---------------------------------------------------------------------- * * TclLog2 -- * * Procedure used while collecting compilation statistics to determine * the log base 2 of an integer. * * Results: * Returns the log base 2 of the operand. If the argument is less * than or equal to zero, a zero is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ int TclLog2(value) register int value; /* The integer for which to compute the * log base 2. */ { register int n = value; register int result = 0; while (n > 1) { n = n >> 1; result++; } return result; } /* *---------------------------------------------------------------------- * * EvalStatsCmd -- * * Implements the "evalstats" command that prints instruction execution * counts to stdout. * * Results: * Standard Tcl results. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int EvalStatsCmd(unused, interp, argc, argv) ClientData unused; /* Unused. */ Tcl_Interp *interp; /* The current interpreter. */ int argc; /* The number of arguments. */ char **argv; /* The argument strings. */ { register double total = 0.0; register int i; int maxSizeDecade = 0; double totalHeaderBytes = (tclNumCompilations * sizeof(ByteCode)); for (i = 0; i < 256; i++) { if (instructionCount[i] != 0) { total += instructionCount[i]; } } for (i = 31; i >= 0; i--) { if ((tclSourceCount[i] > 0) && (tclByteCodeCount[i] > 0)) { maxSizeDecade = i; break; } } fprintf(stdout, "\nNumber of compilations %ld\n", tclNumCompilations); fprintf(stdout, "Number of executions %ld\n", numExecutions); fprintf(stdout, "Average executions/compilation %.0f\n", ((float) numExecutions/tclNumCompilations)); fprintf(stdout, "\nInstructions executed %.0f\n", total); fprintf(stdout, "Average instructions/compile %.0f\n", total/tclNumCompilations); fprintf(stdout, "Average instructions/execution %.0f\n", total/numExecutions); fprintf(stdout, "\nTotal source bytes %.6g\n", tclTotalSourceBytes); fprintf(stdout, "Total code bytes %.6g\n", tclTotalCodeBytes); fprintf(stdout, "Average code/compilation %.0f\n", tclTotalCodeBytes/tclNumCompilations); fprintf(stdout, "Average code/source %.2f\n", tclTotalCodeBytes/tclTotalSourceBytes); fprintf(stdout, "Current source bytes %.6g\n", tclCurrentSourceBytes); fprintf(stdout, "Current code bytes %.6g\n", tclCurrentCodeBytes); fprintf(stdout, "Current code/source %.2f\n", tclCurrentCodeBytes/tclCurrentSourceBytes); fprintf(stdout, "\nTotal objects allocated %ld\n", tclObjsAlloced); fprintf(stdout, "Total objects freed %ld\n", tclObjsFreed); fprintf(stdout, "Current objects: %ld\n", (tclObjsAlloced - tclObjsFreed)); fprintf(stdout, "\nBreakdown of code byte requirements:\n"); fprintf(stdout, " Total bytes Pct of Avg per\n"); fprintf(stdout, " all code compile\n"); fprintf(stdout, "Total code %12.6g 100%% %8.2f\n", tclTotalCodeBytes, tclTotalCodeBytes/tclNumCompilations); fprintf(stdout, "Header %12.6g %8.2f%% %8.2f\n", totalHeaderBytes, ((totalHeaderBytes * 100.0) / tclTotalCodeBytes), totalHeaderBytes/tclNumCompilations); fprintf(stdout, "Instructions %12.6g %8.2f%% %8.2f\n", tclTotalInstBytes, ((tclTotalInstBytes * 100.0) / tclTotalCodeBytes), tclTotalInstBytes/tclNumCompilations); fprintf(stdout, "Objects %12.6g %8.2f%% %8.2f\n", tclTotalObjBytes, ((tclTotalObjBytes * 100.0) / tclTotalCodeBytes), tclTotalObjBytes/tclNumCompilations); fprintf(stdout, "Exception table %12.6g %8.2f%% %8.2f\n", tclTotalExceptBytes, ((tclTotalExceptBytes * 100.0) / tclTotalCodeBytes), tclTotalExceptBytes/tclNumCompilations); fprintf(stdout, "Auxiliary data %12.6g %8.2f%% %8.2f\n", tclTotalAuxBytes, ((tclTotalAuxBytes * 100.0) / tclTotalCodeBytes), tclTotalAuxBytes/tclNumCompilations); fprintf(stdout, "Command map %12.6g %8.2f%% %8.2f\n", tclTotalCmdMapBytes, ((tclTotalCmdMapBytes * 100.0) / tclTotalCodeBytes), tclTotalCmdMapBytes/tclNumCompilations); fprintf(stdout, "\nSource and ByteCode size distributions:\n"); fprintf(stdout, " binary decade source code\n"); for (i = 0; i <= maxSizeDecade; i++) { int decadeLow, decadeHigh; if (i == 0) { decadeLow = 0; } else { decadeLow = 1 << i; } decadeHigh = (1 << (i+1)) - 1; fprintf(stdout, " %6d -%6d %6d %6d\n", decadeLow, decadeHigh, tclSourceCount[i], tclByteCodeCount[i]); } fprintf(stdout, "\nInstruction counts:\n"); for (i = 0; i < 256; i++) { if (instructionCount[i]) { fprintf(stdout, "%20s %8d %6.2f%%\n", opName[i], instructionCount[i], (instructionCount[i] * 100.0)/total); } } #ifdef TCL_MEM_DEBUG fprintf(stdout, "\nHeap Statistics:\n"); TclDumpMemoryInfo(stdout); #endif /* TCL_MEM_DEBUG */ return TCL_OK; } #endif /* TCL_COMPILE_STATS */ /* *---------------------------------------------------------------------- * * Tcl_GetCommandFromObj -- * * Returns the command specified by the name in a Tcl_Obj. * * Results: * Returns a token for the command if it is found. Otherwise, if it * can't be found or there is an error, returns NULL. * * Side effects: * May update the internal representation for the object, caching * the command reference so that the next time this procedure is * called with the same object, the command can be found quickly. * *---------------------------------------------------------------------- */ Tcl_Command Tcl_GetCommandFromObj(interp, objPtr) Tcl_Interp *interp; /* The interpreter in which to resolve the * command and to report errors. */ register Tcl_Obj *objPtr; /* The object containing the command's * name. If the name starts with "::", will * be looked up in global namespace. Else, * looked up first in the current namespace * if contextNsPtr is NULL, then in global * namespace. */ { Interp *iPtr = (Interp *) interp; register ResolvedCmdName *resPtr; register Command *cmdPtr; Namespace *currNsPtr; int result; /* * Get the internal representation, converting to a command type if * needed. The internal representation is a ResolvedCmdName that points * to the actual command. */ if (objPtr->typePtr != &tclCmdNameType) { result = tclCmdNameType.setFromAnyProc(interp, objPtr); if (result != TCL_OK) { return (Tcl_Command) NULL; } } resPtr = (ResolvedCmdName *) objPtr->internalRep.otherValuePtr; /* * Get the current namespace. */ if (iPtr->varFramePtr != NULL) { currNsPtr = iPtr->varFramePtr->nsPtr; } else { currNsPtr = iPtr->globalNsPtr; } /* * Check the context namespace and the namespace epoch of the resolved * symbol to make sure that it is fresh. If not, then force another * conversion to the command type, to discard the old rep and create a * new one. Note that we verify that the namespace id of the context * namespace is the same as the one we cached; this insures that the * namespace wasn't deleted and a new one created at the same address * with the same command epoch. */ cmdPtr = NULL; if ((resPtr != NULL) && (resPtr->refNsPtr == currNsPtr) && (resPtr->refNsId == currNsPtr->nsId) && (resPtr->refNsCmdEpoch == currNsPtr->cmdRefEpoch)) { cmdPtr = resPtr->cmdPtr; if (cmdPtr->cmdEpoch != resPtr->cmdEpoch) { cmdPtr = NULL; } } if (cmdPtr == NULL) { result = tclCmdNameType.setFromAnyProc(interp, objPtr); if (result != TCL_OK) { return (Tcl_Command) NULL; } resPtr = (ResolvedCmdName *) objPtr->internalRep.otherValuePtr; if (resPtr != NULL) { cmdPtr = resPtr->cmdPtr; } } if (cmdPtr == NULL) { return (Tcl_Command) NULL; } return (Tcl_Command) cmdPtr; } /* *---------------------------------------------------------------------- * * FreeCmdNameInternalRep -- * * Frees the resources associated with a cmdName object's internal * representation. * * Results: * None. * * Side effects: * Decrements the ref count of any cached ResolvedCmdName structure * pointed to by the cmdName's internal representation. If this is * the last use of the ResolvedCmdName, it is freed. This in turn * decrements the ref count of the Command structure pointed to by * the ResolvedSymbol, which may free the Command structure. * *---------------------------------------------------------------------- */ static void FreeCmdNameInternalRep(objPtr) register Tcl_Obj *objPtr; /* CmdName object with internal * representation to free. */ { register ResolvedCmdName *resPtr = (ResolvedCmdName *) objPtr->internalRep.otherValuePtr; if (resPtr != NULL) { /* * Decrement the reference count of the ResolvedCmdName structure. * If there are no more uses, free the ResolvedCmdName structure. */ resPtr->refCount--; if (resPtr->refCount == 0) { /* * Now free the cached command, unless it is still in its * hash table or if there are other references to it * from other cmdName objects. */ Command *cmdPtr = resPtr->cmdPtr; TclCleanupCommand(cmdPtr); ckfree((char *) resPtr); } } } /* *---------------------------------------------------------------------- * * DupCmdNameInternalRep -- * * Initialize the internal representation of an cmdName Tcl_Obj to a * copy of the internal representation of an existing cmdName object. * * Results: * None. * * Side effects: * "copyPtr"s internal rep is set to point to the ResolvedCmdName * structure corresponding to "srcPtr"s internal rep. Increments the * ref count of the ResolvedCmdName structure pointed to by the * cmdName's internal representation. * *---------------------------------------------------------------------- */ static void DupCmdNameInternalRep(srcPtr, copyPtr) Tcl_Obj *srcPtr; /* Object with internal rep to copy. */ register Tcl_Obj *copyPtr; /* Object with internal rep to set. */ { register ResolvedCmdName *resPtr = (ResolvedCmdName *) srcPtr->internalRep.otherValuePtr; copyPtr->internalRep.twoPtrValue.ptr1 = (VOID *) resPtr; copyPtr->internalRep.twoPtrValue.ptr2 = NULL; if (resPtr != NULL) { resPtr->refCount++; } copyPtr->typePtr = &tclCmdNameType; } /* *---------------------------------------------------------------------- * * SetCmdNameFromAny -- * * Generate an cmdName internal form for the Tcl object "objPtr". * * Results: * The return value is a standard Tcl result. The conversion always * succeeds and TCL_OK is returned. * * Side effects: * A pointer to a ResolvedCmdName structure that holds a cached pointer * to the command with a name that matches objPtr's string rep is * stored as objPtr's internal representation. This ResolvedCmdName * pointer will be NULL if no matching command was found. The ref count * of the cached Command's structure (if any) is also incremented. * *---------------------------------------------------------------------- */ static int SetCmdNameFromAny(interp, objPtr) Tcl_Interp *interp; /* Used for error reporting if not NULL. */ register Tcl_Obj *objPtr; /* The object to convert. */ { Interp *iPtr = (Interp *) interp; char *name; Tcl_Command cmd; register Command *cmdPtr; Namespace *currNsPtr; register ResolvedCmdName *resPtr; /* * Get "objPtr"s string representation. Make it up-to-date if necessary. */ name = objPtr->bytes; if (name == NULL) { name = Tcl_GetStringFromObj(objPtr, (int *) NULL); } /* * Find the Command structure, if any, that describes the command called * "name". Build a ResolvedCmdName that holds a cached pointer to this * Command, and bump the reference count in the referenced Command * structure. A Command structure will not be deleted as long as it is * referenced from a CmdName object. */ cmd = Tcl_FindCommand(interp, name, (Tcl_Namespace *) NULL, /*flags*/ 0); cmdPtr = (Command *) cmd; if (cmdPtr != NULL) { /* * Get the current namespace. */ if (iPtr->varFramePtr != NULL) { currNsPtr = iPtr->varFramePtr->nsPtr; } else { currNsPtr = iPtr->globalNsPtr; } cmdPtr->refCount++; resPtr = (ResolvedCmdName *) ckalloc(sizeof(ResolvedCmdName)); resPtr->cmdPtr = cmdPtr; resPtr->refNsPtr = currNsPtr; resPtr->refNsId = currNsPtr->nsId; resPtr->refNsCmdEpoch = currNsPtr->cmdRefEpoch; resPtr->cmdEpoch = cmdPtr->cmdEpoch; resPtr->refCount = 1; } else { resPtr = NULL; /* no command named "name" was found */ } /* * Free the old internalRep before setting the new one. We do this as * late as possible to allow the conversion code, in particular * GetStringFromObj, to use that old internalRep. If no Command * structure was found, leave NULL as the cached value. */ if ((objPtr->typePtr != NULL) && (objPtr->typePtr->freeIntRepProc != NULL)) { objPtr->typePtr->freeIntRepProc(objPtr); } objPtr->internalRep.twoPtrValue.ptr1 = (VOID *) resPtr; objPtr->internalRep.twoPtrValue.ptr2 = NULL; objPtr->typePtr = &tclCmdNameType; return TCL_OK; } /* *---------------------------------------------------------------------- * * UpdateStringOfCmdName -- * * Update the string representation for an cmdName object. * * Results: * None. * * Side effects: * Generates a panic. * *---------------------------------------------------------------------- */ static void UpdateStringOfCmdName(objPtr) Tcl_Obj *objPtr; /* CmdName obj to update string rep. */ { /* * This procedure is never invoked since the internal representation of * a cmdName object is never modified. */ panic("UpdateStringOfCmdName should never be invoked"); } #ifdef TCL_COMPILE_DEBUG /* *---------------------------------------------------------------------- * * StringForResultCode -- * * Procedure that returns a human-readable string representing a * Tcl result code such as TCL_ERROR. * * Results: * If the result code is one of the standard Tcl return codes, the * result is a string representing that code such as "TCL_ERROR". * Otherwise, the result string is that code formatted as a * sequence of decimal digit characters. Note that the resulting * string must not be modified by the caller. * * Side effects: * None. * *---------------------------------------------------------------------- */ static char * StringForResultCode(result) int result; /* The Tcl result code for which to * generate a string. */ { static char buf[20]; if ((result >= TCL_OK) && (result <= TCL_CONTINUE)) { return resultStrings[result]; } TclFormatInt(buf, result); return buf; } #endif /* TCL_COMPILE_DEBUG */