tclBasic.c Go to the documentation of this file. /* * tclBasic.c -- * * Contains the basic facilities for TCL command interpretation, * including interpreter creation and deletion, command creation and * deletion, and command/script execution. * * Copyright (c) 1987-1994 The Regents of the University of California. * Copyright (c) 1994-1997 Sun Microsystems, Inc. * Copyright (c) 1998-1999 by Scriptics Corporation. * Copyright (c) 2001, 2002 by Kevin B. Kenny. All rights reserved. * Copyright (c) 2007 Daniel A. Steffen <das@users.sourceforge.net> * * See the file "license.terms" for information on usage and redistribution of * this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclBasic.c,v 1.291 2008/01/23 21:21:26 dgp Exp $ */ #include "tclInt.h" #include "tclCompile.h" #include <float.h> #include <limits.h> #include <math.h> #include "tommath.h" /* * Determine whether we're using IEEE floating point */ #if (FLT_RADIX == 2) && (DBL_MANT_DIG == 53) && (DBL_MAX_EXP == 1024) # define IEEE_FLOATING_POINT /* Largest odd integer that can be represented exactly in a double */ # define MAX_EXACT 9007199254740991.0 #endif /* * The following structure defines the client data for a math function * registered with Tcl_CreateMathFunc */ typedef struct OldMathFuncData { Tcl_MathProc *proc; /* Handler function */ int numArgs; /* Number of args expected */ Tcl_ValueType *argTypes; /* Types of the args */ ClientData clientData; /* Client data for the handler function */ } OldMathFuncData; /* * Static functions in this file: */ static char * CallCommandTraces(Interp *iPtr, Command *cmdPtr, const char *oldName, const char *newName, int flags); static int CheckDoubleResult(Tcl_Interp *interp, double dResult); static void DeleteInterpProc(Tcl_Interp *interp); static void DeleteOpCmdClientData(ClientData clientData); static Tcl_Obj *GetCommandSource(Interp *iPtr, const char *command, int numChars, int objc, Tcl_Obj *const objv[]); static void ProcessUnexpectedResult(Tcl_Interp *interp, int returnCode); static int OldMathFuncProc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static void OldMathFuncDeleteProc(ClientData clientData); static int ExprAbsFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprBinaryFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprBoolFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprCeilFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprDoubleFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprEntierFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprFloorFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprIntFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprIsqrtFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprRandFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprRoundFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprSqrtFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprSrandFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprUnaryFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static int ExprWideFunc(ClientData clientData, Tcl_Interp *interp, int argc, Tcl_Obj *const *objv); static void MathFuncWrongNumArgs(Tcl_Interp *interp, int expected, int actual, Tcl_Obj *const *objv); #ifdef USE_DTRACE static int DTraceObjCmd(ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *const objv[]); #endif extern TclStubs tclStubs; /* * The following structure define the commands in the Tcl core. */ typedef struct { const char *name; /* Name of object-based command. */ Tcl_ObjCmdProc *objProc; /* Object-based function for command. */ CompileProc *compileProc; /* Function called to compile command. */ int isSafe; /* If non-zero, command will be present in * safe interpreter. Otherwise it will be * hidden. */ } CmdInfo; /* * The built-in commands, and the functions that implement them: */ static const CmdInfo builtInCmds[] = { /* * Commands in the generic core. */ {"append", Tcl_AppendObjCmd, TclCompileAppendCmd, 1}, {"apply", Tcl_ApplyObjCmd, NULL, 1}, {"array", Tcl_ArrayObjCmd, NULL, 1}, {"binary", Tcl_BinaryObjCmd, NULL, 1}, {"break", Tcl_BreakObjCmd, TclCompileBreakCmd, 1}, #ifndef EXCLUDE_OBSOLETE_COMMANDS {"case", Tcl_CaseObjCmd, NULL, 1}, #endif {"catch", Tcl_CatchObjCmd, TclCompileCatchCmd, 1}, {"concat", Tcl_ConcatObjCmd, NULL, 1}, {"continue", Tcl_ContinueObjCmd, TclCompileContinueCmd, 1}, {"error", Tcl_ErrorObjCmd, NULL, 1}, {"eval", Tcl_EvalObjCmd, NULL, 1}, {"expr", Tcl_ExprObjCmd, TclCompileExprCmd, 1}, {"for", Tcl_ForObjCmd, TclCompileForCmd, 1}, {"foreach", Tcl_ForeachObjCmd, TclCompileForeachCmd, 1}, {"format", Tcl_FormatObjCmd, NULL, 1}, {"global", Tcl_GlobalObjCmd, TclCompileGlobalCmd, 1}, {"if", Tcl_IfObjCmd, TclCompileIfCmd, 1}, {"incr", Tcl_IncrObjCmd, TclCompileIncrCmd, 1}, {"join", Tcl_JoinObjCmd, NULL, 1}, {"lappend", Tcl_LappendObjCmd, TclCompileLappendCmd, 1}, {"lassign", Tcl_LassignObjCmd, TclCompileLassignCmd, 1}, {"lindex", Tcl_LindexObjCmd, TclCompileLindexCmd, 1}, {"linsert", Tcl_LinsertObjCmd, NULL, 1}, {"list", Tcl_ListObjCmd, TclCompileListCmd, 1}, {"llength", Tcl_LlengthObjCmd, TclCompileLlengthCmd, 1}, {"lrange", Tcl_LrangeObjCmd, NULL, 1}, {"lrepeat", Tcl_LrepeatObjCmd, NULL, 1}, {"lreplace", Tcl_LreplaceObjCmd, NULL, 1}, {"lreverse", Tcl_LreverseObjCmd, NULL, 1}, {"lsearch", Tcl_LsearchObjCmd, NULL, 1}, {"lset", Tcl_LsetObjCmd, TclCompileLsetCmd, 1}, {"lsort", Tcl_LsortObjCmd, NULL, 1}, {"namespace", Tcl_NamespaceObjCmd, TclCompileNamespaceCmd, 1}, {"package", Tcl_PackageObjCmd, NULL, 1}, {"proc", Tcl_ProcObjCmd, NULL, 1}, {"regexp", Tcl_RegexpObjCmd, TclCompileRegexpCmd, 1}, {"regsub", Tcl_RegsubObjCmd, NULL, 1}, {"rename", Tcl_RenameObjCmd, NULL, 1}, {"return", Tcl_ReturnObjCmd, TclCompileReturnCmd, 1}, {"scan", Tcl_ScanObjCmd, NULL, 1}, {"set", Tcl_SetObjCmd, TclCompileSetCmd, 1}, {"split", Tcl_SplitObjCmd, NULL, 1}, {"subst", Tcl_SubstObjCmd, NULL, 1}, {"switch", Tcl_SwitchObjCmd, TclCompileSwitchCmd, 1}, {"trace", Tcl_TraceObjCmd, NULL, 1}, {"unset", Tcl_UnsetObjCmd, NULL, 1}, {"uplevel", Tcl_UplevelObjCmd, NULL, 1}, {"upvar", Tcl_UpvarObjCmd, TclCompileUpvarCmd, 1}, {"variable", Tcl_VariableObjCmd, TclCompileVariableCmd, 1}, {"while", Tcl_WhileObjCmd, TclCompileWhileCmd, 1}, /* * Commands in the OS-interface. Note that many of these are unsafe. */ {"after", Tcl_AfterObjCmd, NULL, 1}, {"cd", Tcl_CdObjCmd, NULL, 0}, {"close", Tcl_CloseObjCmd, NULL, 1}, {"eof", Tcl_EofObjCmd, NULL, 1}, {"encoding", Tcl_EncodingObjCmd, NULL, 0}, {"exec", Tcl_ExecObjCmd, NULL, 0}, {"exit", Tcl_ExitObjCmd, NULL, 0}, {"fblocked", Tcl_FblockedObjCmd, NULL, 1}, {"fconfigure", Tcl_FconfigureObjCmd, NULL, 0}, {"fcopy", Tcl_FcopyObjCmd, NULL, 1}, {"file", Tcl_FileObjCmd, NULL, 0}, {"fileevent", Tcl_FileEventObjCmd, NULL, 1}, {"flush", Tcl_FlushObjCmd, NULL, 1}, {"gets", Tcl_GetsObjCmd, NULL, 1}, {"glob", Tcl_GlobObjCmd, NULL, 0}, {"load", Tcl_LoadObjCmd, NULL, 0}, {"open", Tcl_OpenObjCmd, NULL, 0}, {"pid", Tcl_PidObjCmd, NULL, 1}, {"puts", Tcl_PutsObjCmd, NULL, 1}, {"pwd", Tcl_PwdObjCmd, NULL, 0}, {"read", Tcl_ReadObjCmd, NULL, 1}, {"seek", Tcl_SeekObjCmd, NULL, 1}, {"socket", Tcl_SocketObjCmd, NULL, 0}, {"source", Tcl_SourceObjCmd, NULL, 0}, {"tell", Tcl_TellObjCmd, NULL, 1}, {"time", Tcl_TimeObjCmd, NULL, 1}, {"unload", Tcl_UnloadObjCmd, NULL, 0}, {"update", Tcl_UpdateObjCmd, NULL, 1}, {"vwait", Tcl_VwaitObjCmd, NULL, 1}, {NULL, NULL, NULL, 0} }; /* * Math functions. All are safe. */ typedef struct { const char *name; /* Name of the function. The full name is * "::tcl::mathfunc::<name>". */ Tcl_ObjCmdProc *objCmdProc; /* Function that evaluates the function */ ClientData clientData; /* Client data for the function */ } BuiltinFuncDef; static const BuiltinFuncDef BuiltinFuncTable[] = { { "abs", ExprAbsFunc, NULL }, { "acos", ExprUnaryFunc, (ClientData) acos }, { "asin", ExprUnaryFunc, (ClientData) asin }, { "atan", ExprUnaryFunc, (ClientData) atan }, { "atan2", ExprBinaryFunc, (ClientData) atan2 }, { "bool", ExprBoolFunc, NULL }, { "ceil", ExprCeilFunc, NULL }, { "cos", ExprUnaryFunc, (ClientData) cos }, { "cosh", ExprUnaryFunc, (ClientData) cosh }, { "double", ExprDoubleFunc, NULL }, { "entier", ExprEntierFunc, NULL }, { "exp", ExprUnaryFunc, (ClientData) exp }, { "floor", ExprFloorFunc, NULL }, { "fmod", ExprBinaryFunc, (ClientData) fmod }, { "hypot", ExprBinaryFunc, (ClientData) hypot }, { "int", ExprIntFunc, NULL }, { "isqrt", ExprIsqrtFunc, NULL }, { "log", ExprUnaryFunc, (ClientData) log }, { "log10", ExprUnaryFunc, (ClientData) log10 }, { "pow", ExprBinaryFunc, (ClientData) pow }, { "rand", ExprRandFunc, NULL }, { "round", ExprRoundFunc, NULL }, { "sin", ExprUnaryFunc, (ClientData) sin }, { "sinh", ExprUnaryFunc, (ClientData) sinh }, { "sqrt", ExprSqrtFunc, NULL }, { "srand", ExprSrandFunc, NULL }, { "tan", ExprUnaryFunc, (ClientData) tan }, { "tanh", ExprUnaryFunc, (ClientData) tanh }, { "wide", ExprWideFunc, NULL }, { NULL, NULL, NULL } }; /* * TIP#174's math operators. All are safe. */ typedef struct { const char *name; /* Name of object-based command. */ Tcl_ObjCmdProc *objProc; /* Object-based function for command. */ CompileProc *compileProc; /* Function called to compile command. */ union { int numArgs; int identity; } i; const char *expected; /* For error message, what argument(s) * were expected. */ } OpCmdInfo; static const OpCmdInfo mathOpCmds[] = { { "~", TclSingleOpCmd, TclCompileInvertOpCmd, /* numArgs */ {1}, "integer"}, { "!", TclSingleOpCmd, TclCompileNotOpCmd, /* numArgs */ {1}, "boolean"}, { "+", TclVariadicOpCmd, TclCompileAddOpCmd, /* identity */ {0}, NULL}, { "*", TclVariadicOpCmd, TclCompileMulOpCmd, /* identity */ {1}, NULL}, { "&", TclVariadicOpCmd, TclCompileAndOpCmd, /* identity */ {-1}, NULL}, { "|", TclVariadicOpCmd, TclCompileOrOpCmd, /* identity */ {0}, NULL}, { "^", TclVariadicOpCmd, TclCompileXorOpCmd, /* identity */ {0}, NULL}, { "**", TclVariadicOpCmd, TclCompilePowOpCmd, /* identity */ {1}, NULL}, { "<<", TclSingleOpCmd, TclCompileLshiftOpCmd, /* numArgs */ {2}, "integer shift"}, { ">>", TclSingleOpCmd, TclCompileRshiftOpCmd, /* numArgs */ {2}, "integer shift"}, { "%", TclSingleOpCmd, TclCompileModOpCmd, /* numArgs */ {2}, "integer integer"}, { "!=", TclSingleOpCmd, TclCompileNeqOpCmd, /* numArgs */ {2}, "value value"}, { "ne", TclSingleOpCmd, TclCompileStrneqOpCmd, /* numArgs */ {2}, "value value"}, { "in", TclSingleOpCmd, TclCompileInOpCmd, /* numArgs */ {2}, "value list"}, { "ni", TclSingleOpCmd, TclCompileNiOpCmd, /* numArgs */ {2}, "value list"}, { "-", TclNoIdentOpCmd, TclCompileMinusOpCmd, /* unused */ {0}, "value ?value ...?"}, { "/", TclNoIdentOpCmd, TclCompileDivOpCmd, /* unused */ {0}, "value ?value ...?"}, { "<", TclSortingOpCmd, TclCompileLessOpCmd, /* unused */ {0}, NULL}, { "<=", TclSortingOpCmd, TclCompileLeqOpCmd, /* unused */ {0}, NULL}, { ">", TclSortingOpCmd, TclCompileGreaterOpCmd, /* unused */ {0}, NULL}, { ">=", TclSortingOpCmd, TclCompileGeqOpCmd, /* unused */ {0}, NULL}, { "==", TclSortingOpCmd, TclCompileEqOpCmd, /* unused */ {0}, NULL}, { "eq", TclSortingOpCmd, TclCompileStreqOpCmd, /* unused */ {0}, NULL}, { NULL, NULL, NULL, {0}, NULL} }; /* * Macros for stack checks. The goal of these macros is to allow the size of * the stack to be checked (so preventing overflow) in a *cheap* way. Note * that the check needs to be (amortized) cheap since it is on the critical * path for recursion. */ #if defined(TCL_NO_STACK_CHECK) /* * Stack check disabled: make them noops. */ # define CheckCStack(interp, localIntPtr) 1 # define GetCStackParams(iPtr) /* do nothing */ #elif defined(TCL_CROSS_COMPILE) /* * This variable is static and only set *once*, during library initialization. * It therefore needs no thread guards. */ static int stackGrowsDown = 1; # define GetCStackParams(iPtr) \ stackGrowsDown = TclpGetCStackParams(&((iPtr)->stackBound)) # define CheckCStack(iPtr, localIntPtr) \ (stackGrowsDown \ ? ((localIntPtr) > (iPtr)->stackBound) \ : ((localIntPtr) < (iPtr)->stackBound) \ ) #else /* !TCL_NO_STACK_CHECK && !TCL_CROSS_COMPILE */ # define GetCStackParams(iPtr) \ TclpGetCStackParams(&((iPtr)->stackBound)) # ifdef TCL_STACK_GROWS_UP # define CheckCStack(iPtr, localIntPtr) \ (!(iPtr)->stackBound || (localIntPtr) < (iPtr)->stackBound) # else /* TCL_STACK_GROWS_UP */ # define CheckCStack(iPtr, localIntPtr) \ ((localIntPtr) > (iPtr)->stackBound) # endif /* TCL_STACK_GROWS_UP */ #endif /* TCL_NO_STACK_CHECK/TCL_CROSS_COMPILE */  /* *---------------------------------------------------------------------- * * Tcl_CreateInterp -- * * Create a new TCL command interpreter. * * Results: * The return value is a token for the interpreter, which may be used in * calls to functions like Tcl_CreateCmd, Tcl_Eval, or Tcl_DeleteInterp. * * Side effects: * The command interpreter is initialized with the built-in commands and * with the variables documented in tclvars(n). * *---------------------------------------------------------------------- */ Tcl_Interp * Tcl_CreateInterp(void) { Interp *iPtr; Tcl_Interp *interp; Command *cmdPtr; const BuiltinFuncDef *builtinFuncPtr; const OpCmdInfo *opcmdInfoPtr; const CmdInfo *cmdInfoPtr; Tcl_Namespace *mathfuncNSPtr, *mathopNSPtr; union { char c[sizeof(short)]; short s; } order; #ifdef TCL_COMPILE_STATS ByteCodeStats *statsPtr; #endif /* TCL_COMPILE_STATS */ char mathFuncName[32]; CallFrame *framePtr; int result; TclInitSubsystems(); /* * Panic if someone updated the CallFrame structure without also updating * the Tcl_CallFrame structure (or vice versa). */ if (sizeof(Tcl_CallFrame) != sizeof(CallFrame)) { /*NOTREACHED*/ Tcl_Panic("Tcl_CallFrame and CallFrame are not the same size"); } /* * Initialize support for namespaces and create the global namespace * (whose name is ""; an alias is "::"). This also initializes the Tcl * object type table and other object management code. */ iPtr = (Interp *) ckalloc(sizeof(Interp)); interp = (Tcl_Interp *) iPtr; iPtr->result = iPtr->resultSpace; iPtr->freeProc = NULL; iPtr->errorLine = 0; iPtr->objResultPtr = Tcl_NewObj(); Tcl_IncrRefCount(iPtr->objResultPtr); iPtr->handle = TclHandleCreate(iPtr); iPtr->globalNsPtr = NULL; iPtr->hiddenCmdTablePtr = NULL; iPtr->interpInfo = NULL; iPtr->numLevels = 0; iPtr->maxNestingDepth = MAX_NESTING_DEPTH; iPtr->framePtr = NULL; /* Initialise as soon as :: is available */ iPtr->varFramePtr = NULL; /* Initialise as soon as :: is available */ /* * TIP #280 - Initialize the arrays used to extend the ByteCode and * Proc structures. */ iPtr->cmdFramePtr = NULL; iPtr->linePBodyPtr = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); iPtr->lineBCPtr = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); Tcl_InitHashTable(iPtr->linePBodyPtr, TCL_ONE_WORD_KEYS); Tcl_InitHashTable(iPtr->lineBCPtr, TCL_ONE_WORD_KEYS); iPtr->activeVarTracePtr = NULL; iPtr->returnOpts = NULL; iPtr->errorInfo = NULL; TclNewLiteralStringObj(iPtr->eiVar, "::errorInfo"); Tcl_IncrRefCount(iPtr->eiVar); iPtr->errorCode = NULL; TclNewLiteralStringObj(iPtr->ecVar, "::errorCode"); Tcl_IncrRefCount(iPtr->ecVar); iPtr->returnLevel = 1; iPtr->returnCode = TCL_OK; iPtr->rootFramePtr = NULL; /* Initialise as soon as :: is available */ iPtr->lookupNsPtr = NULL; iPtr->appendResult = NULL; iPtr->appendAvl = 0; iPtr->appendUsed = 0; Tcl_InitHashTable(&iPtr->packageTable, TCL_STRING_KEYS); iPtr->packageUnknown = NULL; /* TIP #268 */ if (getenv("TCL_PKG_PREFER_LATEST") == NULL) { iPtr->packagePrefer = PKG_PREFER_STABLE; } else { iPtr->packagePrefer = PKG_PREFER_LATEST; } iPtr->cmdCount = 0; TclInitLiteralTable(&(iPtr->literalTable)); iPtr->compileEpoch = 0; iPtr->compiledProcPtr = NULL; iPtr->resolverPtr = NULL; iPtr->evalFlags = 0; iPtr->scriptFile = NULL; iPtr->flags = 0; iPtr->tracePtr = NULL; iPtr->tracesForbiddingInline = 0; iPtr->activeCmdTracePtr = NULL; iPtr->activeInterpTracePtr = NULL; iPtr->assocData = NULL; iPtr->execEnvPtr = NULL; /* Set after namespaces initialized. */ iPtr->emptyObjPtr = Tcl_NewObj(); /* Another empty object. */ Tcl_IncrRefCount(iPtr->emptyObjPtr); iPtr->resultSpace[0] = 0; iPtr->threadId = Tcl_GetCurrentThread(); /* * Initialise the tables for variable traces and searches *before* * creating the global ns - so that the trace on errorInfo can be * recorded. */ Tcl_InitHashTable(&iPtr->varTraces, TCL_ONE_WORD_KEYS); Tcl_InitHashTable(&iPtr->varSearches, TCL_ONE_WORD_KEYS); iPtr->globalNsPtr = NULL; /* Force creation of global ns below. */ iPtr->globalNsPtr = (Namespace *) Tcl_CreateNamespace(interp, "", NULL, NULL); if (iPtr->globalNsPtr == NULL) { Tcl_Panic("Tcl_CreateInterp: can't create global namespace"); } /* * Initialise the rootCallframe. It cannot be allocated on the stack, as * it has to be in place before TclCreateExecEnv tries to use a variable. */ /* This is needed to satisfy GCC 3.3's strict aliasing rules */ framePtr = (CallFrame *) ckalloc(sizeof(CallFrame)); result = Tcl_PushCallFrame(interp, (Tcl_CallFrame *) framePtr, (Tcl_Namespace *) iPtr->globalNsPtr, /*isProcCallFrame*/ 0); if (result != TCL_OK) { Tcl_Panic("Tcl_CreateInterp: failed to push the root stack frame"); } framePtr->objc = 0; iPtr->framePtr = framePtr; iPtr->varFramePtr = framePtr; iPtr->rootFramePtr = framePtr; /* * Initialize support for code compilation and execution. We call * TclCreateExecEnv after initializing namespaces since it tries to * reference a Tcl variable (it links to the Tcl "tcl_traceExec" * variable). */ iPtr->execEnvPtr = TclCreateExecEnv(interp); /* * TIP #219, Tcl Channel Reflection API support. */ iPtr->chanMsg = NULL; /* * Initialize the compilation and execution statistics kept for this * interpreter. */ #ifdef TCL_COMPILE_STATS statsPtr = &(iPtr->stats); statsPtr->numExecutions = 0; statsPtr->numCompilations = 0; statsPtr->numByteCodesFreed = 0; (void) memset(statsPtr->instructionCount, 0, sizeof(statsPtr->instructionCount)); statsPtr->totalSrcBytes = 0.0; statsPtr->totalByteCodeBytes = 0.0; statsPtr->currentSrcBytes = 0.0; statsPtr->currentByteCodeBytes = 0.0; (void) memset(statsPtr->srcCount, 0, sizeof(statsPtr->srcCount)); (void) memset(statsPtr->byteCodeCount, 0, sizeof(statsPtr->byteCodeCount)); (void) memset(statsPtr->lifetimeCount, 0, sizeof(statsPtr->lifetimeCount)); statsPtr->currentInstBytes = 0.0; statsPtr->currentLitBytes = 0.0; statsPtr->currentExceptBytes = 0.0; statsPtr->currentAuxBytes = 0.0; statsPtr->currentCmdMapBytes = 0.0; statsPtr->numLiteralsCreated = 0; statsPtr->totalLitStringBytes = 0.0; statsPtr->currentLitStringBytes = 0.0; (void) memset(statsPtr->literalCount, 0, sizeof(statsPtr->literalCount)); #endif /* TCL_COMPILE_STATS */ /* * Initialise the stub table pointer. */ iPtr->stubTable = &tclStubs; /* * Initialize the ensemble error message rewriting support. */ iPtr->ensembleRewrite.sourceObjs = NULL; iPtr->ensembleRewrite.numRemovedObjs = 0; iPtr->ensembleRewrite.numInsertedObjs = 0; /* * TIP#143: Initialise the resource limit support. */ TclInitLimitSupport(interp); /* * Initialise the thread-specific data ekeko. */ #if defined(TCL_THREADS) && defined(USE_THREAD_ALLOC) iPtr->allocCache = TclpGetAllocCache(); #else iPtr->allocCache = NULL; #endif iPtr->pendingObjDataPtr = NULL; iPtr->asyncReadyPtr = TclGetAsyncReadyPtr(); /* * Insure that the stack checking mechanism for this interp is * initialized. */ GetCStackParams(iPtr); /* * Create the core commands. Do it here, rather than calling * Tcl_CreateCommand, because it's faster (there's no need to check for a * pre-existing command by the same name). If a command has a Tcl_CmdProc * but no Tcl_ObjCmdProc, set the Tcl_ObjCmdProc to * TclInvokeStringCommand. This is an object-based wrapper function that * extracts strings, calls the string function, and creates an object for * the result. Similarly, if a command has a Tcl_ObjCmdProc but no * Tcl_CmdProc, set the Tcl_CmdProc to TclInvokeObjectCommand. */ for (cmdInfoPtr = builtInCmds; cmdInfoPtr->name != NULL; cmdInfoPtr++) { int isNew; Tcl_HashEntry *hPtr; if ((cmdInfoPtr->objProc == NULL) && (cmdInfoPtr->compileProc == NULL)) { Tcl_Panic("builtin command with NULL object command proc and a NULL compile proc"); } hPtr = Tcl_CreateHashEntry(&iPtr->globalNsPtr->cmdTable, cmdInfoPtr->name, &isNew); if (isNew) { cmdPtr = (Command *) ckalloc(sizeof(Command)); cmdPtr->hPtr = hPtr; cmdPtr->nsPtr = iPtr->globalNsPtr; cmdPtr->refCount = 1; cmdPtr->cmdEpoch = 0; cmdPtr->compileProc = cmdInfoPtr->compileProc; cmdPtr->proc = TclInvokeObjectCommand; cmdPtr->clientData = cmdPtr; cmdPtr->objProc = cmdInfoPtr->objProc; cmdPtr->objClientData = NULL; cmdPtr->deleteProc = NULL; cmdPtr->deleteData = NULL; cmdPtr->flags = 0; cmdPtr->importRefPtr = NULL; cmdPtr->tracePtr = NULL; Tcl_SetHashValue(hPtr, cmdPtr); } } /* * Create the "chan", "dict", "info" and "string" ensembles. Note that all * these commands (and their subcommands that are not present in the * global namespace) are wholly safe. */ TclInitChanCmd(interp); TclInitDictCmd(interp); TclInitInfoCmd(interp); TclInitStringCmd(interp); /* * Register "clock" subcommands. These *do* go through * Tcl_CreateObjCommand, since they aren't in the global namespace and * involve ensembles. */ TclClockInit(interp); /* * Register the built-in functions. This is empty now that they are * implemented as commands in the ::tcl::mathfunc namespace. */ /* * Register the default [interp bgerror] handler. */ Tcl_CreateObjCommand(interp, "::tcl::Bgerror", TclDefaultBgErrorHandlerObjCmd, NULL, NULL); /* * Create an unsupported command for debugging bytecode. */ Tcl_CreateObjCommand(interp, "::tcl::unsupported::disassemble", Tcl_DisassembleObjCmd, NULL, NULL); #ifdef USE_DTRACE /* * Register the tcl::dtrace command. */ Tcl_CreateObjCommand(interp, "::tcl::dtrace", DTraceObjCmd, NULL, NULL); #endif /* USE_DTRACE */ /* * Register the builtin math functions. */ mathfuncNSPtr = Tcl_CreateNamespace(interp, "::tcl::mathfunc", NULL,NULL); if (mathfuncNSPtr == NULL) { Tcl_Panic("Can't create math function namespace"); } strcpy(mathFuncName, "::tcl::mathfunc::"); #define MATH_FUNC_PREFIX_LEN 17 /* == strlen("::tcl::mathfunc::") */ for (builtinFuncPtr = BuiltinFuncTable; builtinFuncPtr->name != NULL; builtinFuncPtr++) { strcpy(mathFuncName+MATH_FUNC_PREFIX_LEN, builtinFuncPtr->name); Tcl_CreateObjCommand(interp, mathFuncName, builtinFuncPtr->objCmdProc, builtinFuncPtr->clientData, NULL); Tcl_Export(interp, mathfuncNSPtr, builtinFuncPtr->name, 0); } /* * Register the mathematical "operator" commands. [TIP #174] */ mathopNSPtr = Tcl_CreateNamespace(interp, "::tcl::mathop", NULL, NULL); #define MATH_OP_PREFIX_LEN 15 /* == strlen("::tcl::mathop::") */ if (mathopNSPtr == NULL) { Tcl_Panic("can't create math operator namespace"); } (void) Tcl_Export(interp, mathopNSPtr, "*", 1); strcpy(mathFuncName, "::tcl::mathop::"); for (opcmdInfoPtr=mathOpCmds ; opcmdInfoPtr->name!=NULL ; opcmdInfoPtr++){ TclOpCmdClientData *occdPtr = (TclOpCmdClientData *) ckalloc(sizeof(TclOpCmdClientData)); occdPtr->op = opcmdInfoPtr->name; occdPtr->i.numArgs = opcmdInfoPtr->i.numArgs; occdPtr->expected = opcmdInfoPtr->expected; strcpy(mathFuncName + MATH_OP_PREFIX_LEN, opcmdInfoPtr->name); cmdPtr = (Command *) Tcl_CreateObjCommand(interp, mathFuncName, opcmdInfoPtr->objProc, occdPtr, DeleteOpCmdClientData); if (cmdPtr == NULL) { Tcl_Panic("failed to create math operator %s", opcmdInfoPtr->name); } else if (opcmdInfoPtr->compileProc != NULL) { cmdPtr->compileProc = opcmdInfoPtr->compileProc; } } /* * Do Multiple/Safe Interps Tcl init stuff */ TclInterpInit(interp); TclSetupEnv(interp); /* * TIP #59: Make embedded configuration information available. */ TclInitEmbeddedConfigurationInformation(interp); /* * Compute the byte order of this machine. */ order.s = 1; Tcl_SetVar2(interp, "tcl_platform", "byteOrder", ((order.c[0] == 1) ? "littleEndian" : "bigEndian"), TCL_GLOBAL_ONLY); Tcl_SetVar2Ex(interp, "tcl_platform", "wordSize", Tcl_NewLongObj((long) sizeof(long)), TCL_GLOBAL_ONLY); /* TIP #291 */ Tcl_SetVar2Ex(interp, "tcl_platform", "pointerSize", Tcl_NewLongObj((long) sizeof(void *)), TCL_GLOBAL_ONLY); /* * Set up other variables such as tcl_version and tcl_library */ Tcl_SetVar(interp, "tcl_patchLevel", TCL_PATCH_LEVEL, TCL_GLOBAL_ONLY); Tcl_SetVar(interp, "tcl_version", TCL_VERSION, TCL_GLOBAL_ONLY); Tcl_TraceVar2(interp, "tcl_precision", NULL, TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS, TclPrecTraceProc, NULL); TclpSetVariables(interp); #ifdef TCL_THREADS /* * The existence of the "threaded" element of the tcl_platform array * indicates that this particular Tcl shell has been compiled with threads * turned on. Using "info exists tcl_platform(threaded)" a Tcl script can * introspect on the interpreter level of thread safety. */ Tcl_SetVar2(interp, "tcl_platform", "threaded", "1", TCL_GLOBAL_ONLY); #endif /* * Register Tcl's version number. * TIP #268: Full patchlevel instead of just major.minor */ Tcl_PkgProvideEx(interp, "Tcl", TCL_PATCH_LEVEL, &tclStubs); #ifdef Tcl_InitStubs #undef Tcl_InitStubs #endif Tcl_InitStubs(interp, TCL_VERSION, 1); if (TclTommath_Init(interp) != TCL_OK) { Tcl_Panic(Tcl_GetString(Tcl_GetObjResult(interp))); } return interp; } static void DeleteOpCmdClientData( ClientData clientData) { TclOpCmdClientData *occdPtr = clientData; ckfree((char *) occdPtr); }  /* *---------------------------------------------------------------------- * * TclHideUnsafeCommands -- * * Hides base commands that are not marked as safe from this interpreter. * * Results: * TCL_OK if it succeeds, TCL_ERROR else. * * Side effects: * Hides functionality in an interpreter. * *---------------------------------------------------------------------- */ int TclHideUnsafeCommands( Tcl_Interp *interp) /* Hide commands in this interpreter. */ { register const CmdInfo *cmdInfoPtr; if (interp == NULL) { return TCL_ERROR; } for (cmdInfoPtr = builtInCmds; cmdInfoPtr->name != NULL; cmdInfoPtr++) { if (!cmdInfoPtr->isSafe) { Tcl_HideCommand(interp, cmdInfoPtr->name, cmdInfoPtr->name); } } return TCL_OK; }  /* *-------------------------------------------------------------- * * Tcl_CallWhenDeleted -- * * Arrange for a function to be called before a given interpreter is * deleted. The function is called as soon as Tcl_DeleteInterp is called; * if Tcl_CallWhenDeleted is called on an interpreter that has already * been deleted, the function will be called when the last Tcl_Release is * done on the interpreter. * * Results: * None. * * Side effects: * When Tcl_DeleteInterp is invoked to delete interp, proc will be * invoked. See the manual entry for details. * *-------------------------------------------------------------- */ void Tcl_CallWhenDeleted( Tcl_Interp *interp, /* Interpreter to watch. */ Tcl_InterpDeleteProc *proc, /* Function to call when interpreter is about * to be deleted. */ ClientData clientData) /* One-word value to pass to proc. */ { Interp *iPtr = (Interp *) interp; static Tcl_ThreadDataKey assocDataCounterKey; int *assocDataCounterPtr = Tcl_GetThreadData(&assocDataCounterKey, (int)sizeof(int)); int isNew; char buffer[32 + TCL_INTEGER_SPACE]; AssocData *dPtr = (AssocData *) ckalloc(sizeof(AssocData)); Tcl_HashEntry *hPtr; sprintf(buffer, "Assoc Data Key #%d", *assocDataCounterPtr); (*assocDataCounterPtr)++; if (iPtr->assocData == NULL) { iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS); } hPtr = Tcl_CreateHashEntry(iPtr->assocData, buffer, &isNew); dPtr->proc = proc; dPtr->clientData = clientData; Tcl_SetHashValue(hPtr, dPtr); }  /* *-------------------------------------------------------------- * * Tcl_DontCallWhenDeleted -- * * Cancel the arrangement for a function to be called when a given * interpreter is deleted. * * Results: * None. * * Side effects: * If proc and clientData were previously registered as a callback via * Tcl_CallWhenDeleted, they are unregistered. If they weren't previously * registered then nothing happens. * *-------------------------------------------------------------- */ void Tcl_DontCallWhenDeleted( Tcl_Interp *interp, /* Interpreter to watch. */ Tcl_InterpDeleteProc *proc, /* Function to call when interpreter is about * to be deleted. */ ClientData clientData) /* One-word value to pass to proc. */ { Interp *iPtr = (Interp *) interp; Tcl_HashTable *hTablePtr; Tcl_HashSearch hSearch; Tcl_HashEntry *hPtr; AssocData *dPtr; hTablePtr = iPtr->assocData; if (hTablePtr == NULL) { return; } for (hPtr = Tcl_FirstHashEntry(hTablePtr, &hSearch); hPtr != NULL; hPtr = Tcl_NextHashEntry(&hSearch)) { dPtr = (AssocData *) Tcl_GetHashValue(hPtr); if ((dPtr->proc == proc) && (dPtr->clientData == clientData)) { ckfree((char *) dPtr); Tcl_DeleteHashEntry(hPtr); return; } } }  /* *---------------------------------------------------------------------- * * Tcl_SetAssocData -- * * Creates a named association between user-specified data, a delete * function and this interpreter. If the association already exists the * data is overwritten with the new data. The delete function will be * invoked when the interpreter is deleted. * * Results: * None. * * Side effects: * Sets the associated data, creates the association if needed. * *---------------------------------------------------------------------- */ void Tcl_SetAssocData( Tcl_Interp *interp, /* Interpreter to associate with. */ const char *name, /* Name for association. */ Tcl_InterpDeleteProc *proc, /* Proc to call when interpreter is about to * be deleted. */ ClientData clientData) /* One-word value to pass to proc. */ { Interp *iPtr = (Interp *) interp; AssocData *dPtr; Tcl_HashEntry *hPtr; int isNew; if (iPtr->assocData == NULL) { iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable)); Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS); } hPtr = Tcl_CreateHashEntry(iPtr->assocData, name, &isNew); if (isNew == 0) { dPtr = Tcl_GetHashValue(hPtr); } else { dPtr = (AssocData *) ckalloc(sizeof(AssocData)); } dPtr->proc = proc; dPtr->clientData = clientData; Tcl_SetHashValue(hPtr, dPtr); }  /* *---------------------------------------------------------------------- * * Tcl_DeleteAssocData -- * * Deletes a named association of user-specified data with the specified * interpreter. * * Results: * None. * * Side effects: * Deletes the association. * *---------------------------------------------------------------------- */ void Tcl_DeleteAssocData( Tcl_Interp *interp, /* Interpreter to associate with. */ const char *name) /* Name of association. */ { Interp *iPtr = (Interp *) interp; AssocData *dPtr; Tcl_HashEntry *hPtr; if (iPtr->assocData == NULL) { return; } hPtr = Tcl_FindHashEntry(iPtr->assocData, name); if (hPtr == NULL) { return; } dPtr = Tcl_GetHashValue(hPtr); if (dPtr->proc != NULL) { dPtr->proc(dPtr->clientData, interp); } ckfree((char *) dPtr); Tcl_DeleteHashEntry(hPtr); }  /* *---------------------------------------------------------------------- * * Tcl_GetAssocData -- * * Returns the client data associated with this name in the specified * interpreter. * * Results: * The client data in the AssocData record denoted by the named * association, or NULL. * * Side effects: * None. * *---------------------------------------------------------------------- */ ClientData Tcl_GetAssocData( Tcl_Interp *interp, /* Interpreter associated with. */ const char *name, /* Name of association. */ Tcl_InterpDeleteProc **procPtr) /* Pointer to place to store address of * current deletion callback. */ { Interp *iPtr = (Interp *) interp; AssocData *dPtr; Tcl_HashEntry *hPtr; if (iPtr->assocData == NULL) { return NULL; } hPtr = Tcl_FindHashEntry(iPtr->assocData, name); if (hPtr == NULL) { return NULL; } dPtr = Tcl_GetHashValue(hPtr); if (procPtr != NULL) { *procPtr = dPtr->proc; } return dPtr->clientData; }  /* *---------------------------------------------------------------------- * * Tcl_InterpDeleted -- * * Returns nonzero if the interpreter has been deleted with a call to * Tcl_DeleteInterp. * * Results: * Nonzero if the interpreter is deleted, zero otherwise. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_InterpDeleted( Tcl_Interp *interp) { return (((Interp *) interp)->flags & DELETED) ? 1 : 0; }  /* *---------------------------------------------------------------------- * * Tcl_DeleteInterp -- * * Ensures that the interpreter will be deleted eventually. If there are * no Tcl_Preserve calls in effect for this interpreter, it is deleted * immediately, otherwise the interpreter is deleted when the last * Tcl_Preserve is matched by a call to Tcl_Release. In either case, the * function runs the currently registered deletion callbacks. * * Results: * None. * * Side effects: * The interpreter is marked as deleted. The caller may still use it * safely if there are calls to Tcl_Preserve in effect for the * interpreter, but further calls to Tcl_Eval etc in this interpreter * will fail. * *---------------------------------------------------------------------- */ void Tcl_DeleteInterp( Tcl_Interp *interp) /* Token for command interpreter (returned by * a previous call to Tcl_CreateInterp). */ { Interp *iPtr = (Interp *) interp; /* * If the interpreter has already been marked deleted, just punt. */ if (iPtr->flags & DELETED) { return; } /* * Mark the interpreter as deleted. No further evals will be allowed. * Increase the compileEpoch as a signal to compiled bytecodes. */ iPtr->flags |= DELETED; iPtr->compileEpoch++; /* * Ensure that the interpreter is eventually deleted. */ Tcl_EventuallyFree(interp, (Tcl_FreeProc *) DeleteInterpProc); }  /* *---------------------------------------------------------------------- * * DeleteInterpProc -- * * Helper function to delete an interpreter. This function is called when * the last call to Tcl_Preserve on this interpreter is matched by a call * to Tcl_Release. The function cleans up all resources used in the * interpreter and calls all currently registered interpreter deletion * callbacks. * * Results: * None. * * Side effects: * Whatever the interpreter deletion callbacks do. Frees resources used * by the interpreter. * *---------------------------------------------------------------------- */ static void DeleteInterpProc( Tcl_Interp *interp) /* Interpreter to delete. */ { Interp *iPtr = (Interp *) interp; Tcl_HashEntry *hPtr; Tcl_HashSearch search; Tcl_HashTable *hTablePtr; ResolverScheme *resPtr, *nextResPtr; /* * Punt if there is an error in the Tcl_Release/Tcl_Preserve matchup. */ if (iPtr->numLevels > 0) { Tcl_Panic("DeleteInterpProc called with active evals"); } /* * The interpreter should already be marked deleted; otherwise how did we * get here? */ if (!(iPtr->flags & DELETED)) { Tcl_Panic("DeleteInterpProc called on interpreter not marked deleted"); } /* * TIP #219, Tcl Channel Reflection API. Discard a leftover state. */ if (iPtr->chanMsg != NULL) { Tcl_DecrRefCount(iPtr->chanMsg); iPtr->chanMsg = NULL; } /* * Shut down all limit handler callback scripts that call back into this * interpreter. Then eliminate all limit handlers for this interpreter. */ TclRemoveScriptLimitCallbacks(interp); TclLimitRemoveAllHandlers(interp); /* * Dismantle the namespace here, before we clear the assocData. If any * background errors occur here, they will be deleted below. * * Dismantle the namespace after freeing the iPtr->handle so that each * bytecode releases its literals without caring to update the literal * table, as it will be freed later in this function without further use. */ TclCleanupLiteralTable(interp, &(iPtr->literalTable)); TclHandleFree(iPtr->handle); TclTeardownNamespace(iPtr->globalNsPtr); /* * Delete all the hidden commands. */ hTablePtr = iPtr->hiddenCmdTablePtr; if (hTablePtr != NULL) { /* * Non-pernicious deletion. The deletion callbacks will not be allowed * to create any new hidden or non-hidden commands. * Tcl_DeleteCommandFromToken() will remove the entry from the * hiddenCmdTablePtr. */ hPtr = Tcl_FirstHashEntry(hTablePtr, &search); for (; hPtr != NULL; hPtr = Tcl_NextHashEntry(&search)) { Tcl_DeleteCommandFromToken(interp, (Tcl_Command) Tcl_GetHashValue(hPtr)); } Tcl_DeleteHashTable(hTablePtr); ckfree((char *) hTablePtr); } /* * Invoke deletion callbacks; note that a callback can create new * callbacks, so we iterate. */ while (iPtr->assocData != NULL) { AssocData *dPtr; hTablePtr = iPtr->assocData; iPtr->assocData = NULL; for (hPtr = Tcl_FirstHashEntry(hTablePtr, &search); hPtr != NULL; hPtr = Tcl_FirstHashEntry(hTablePtr, &search)) { dPtr = Tcl_GetHashValue(hPtr); Tcl_DeleteHashEntry(hPtr); if (dPtr->proc != NULL) { dPtr->proc(dPtr->clientData, interp); } ckfree((char *) dPtr); } Tcl_DeleteHashTable(hTablePtr); ckfree((char *) hTablePtr); } /* * Pop the root frame pointer and finish deleting the global * namespace. The order is important [Bug 1658572]. */ if (iPtr->framePtr != iPtr->rootFramePtr) { Tcl_Panic("DeleteInterpProc: popping rootCallFrame with other frames on top"); } Tcl_PopCallFrame(interp); ckfree((char *) iPtr->rootFramePtr); iPtr->rootFramePtr = NULL; Tcl_DeleteNamespace((Tcl_Namespace *) iPtr->globalNsPtr); /* * Free up the result *after* deleting variables, since variable deletion * could have transferred ownership of the result string to Tcl. */ Tcl_FreeResult(interp); interp->result = NULL; Tcl_DecrRefCount(iPtr->objResultPtr); iPtr->objResultPtr = NULL; Tcl_DecrRefCount(iPtr->ecVar); if (iPtr->errorCode) { Tcl_DecrRefCount(iPtr->errorCode); iPtr->errorCode = NULL; } Tcl_DecrRefCount(iPtr->eiVar); if (iPtr->errorInfo) { Tcl_DecrRefCount(iPtr->errorInfo); iPtr->errorInfo = NULL; } if (iPtr->returnOpts) { Tcl_DecrRefCount(iPtr->returnOpts); } if (iPtr->appendResult != NULL) { ckfree(iPtr->appendResult); iPtr->appendResult = NULL; } TclFreePackageInfo(iPtr); while (iPtr->tracePtr != NULL) { Tcl_DeleteTrace((Tcl_Interp *) iPtr, (Tcl_Trace) iPtr->tracePtr); } if (iPtr->execEnvPtr != NULL) { TclDeleteExecEnv(iPtr->execEnvPtr); } Tcl_DecrRefCount(iPtr->emptyObjPtr); iPtr->emptyObjPtr = NULL; resPtr = iPtr->resolverPtr; while (resPtr) { nextResPtr = resPtr->nextPtr; ckfree(resPtr->name); ckfree((char *) resPtr); resPtr = nextResPtr; } /* * Free up literal objects created for scripts compiled by the * interpreter. */ TclDeleteLiteralTable(interp, &(iPtr->literalTable)); /* * TIP #280 - Release the arrays for ByteCode/Proc extension, and * contents. */ { Tcl_HashEntry *hPtr; Tcl_HashSearch hSearch; int i; for (hPtr = Tcl_FirstHashEntry(iPtr->linePBodyPtr, &hSearch); hPtr != NULL; hPtr = Tcl_NextHashEntry(&hSearch)) { CmdFrame *cfPtr = Tcl_GetHashValue(hPtr); if (cfPtr->type == TCL_LOCATION_SOURCE) { Tcl_DecrRefCount(cfPtr->data.eval.path); } ckfree((char *) cfPtr->line); ckfree((char *) cfPtr); Tcl_DeleteHashEntry(hPtr); } Tcl_DeleteHashTable(iPtr->linePBodyPtr); ckfree((char *) iPtr->linePBodyPtr); iPtr->linePBodyPtr = NULL; /* * See also tclCompile.c, TclCleanupByteCode */ for (hPtr = Tcl_FirstHashEntry(iPtr->lineBCPtr, &hSearch); hPtr != NULL; hPtr = Tcl_NextHashEntry(&hSearch)) { ExtCmdLoc *eclPtr = (ExtCmdLoc *) Tcl_GetHashValue(hPtr); if (eclPtr->type == TCL_LOCATION_SOURCE) { Tcl_DecrRefCount(eclPtr->path); } for (i=0; i< eclPtr->nuloc; i++) { ckfree((char *) eclPtr->loc[i].line); } if (eclPtr->loc != NULL) { ckfree((char *) eclPtr->loc); } ckfree((char *) eclPtr); Tcl_DeleteHashEntry(hPtr); } Tcl_DeleteHashTable(iPtr->lineBCPtr); ckfree((char *) iPtr->lineBCPtr); iPtr->lineBCPtr = NULL; } Tcl_DeleteHashTable(&iPtr->varTraces); Tcl_DeleteHashTable(&iPtr->varSearches); ckfree((char *) iPtr); }  /* *--------------------------------------------------------------------------- * * Tcl_HideCommand -- * * Makes a command hidden so that it cannot be invoked from within an * interpreter, only from within an ancestor. * * Results: * A standard Tcl result; also leaves a message in the interp's result if * an error occurs. * * Side effects: * Removes a command from the command table and create an entry into the * hidden command table under the specified token name. * *--------------------------------------------------------------------------- */ int Tcl_HideCommand( Tcl_Interp *interp, /* Interpreter in which to hide command. */ const char *cmdName, /* Name of command to hide. */ const char *hiddenCmdToken) /* Token name of the to-be-hidden command. */ { Interp *iPtr = (Interp *) interp; Tcl_Command cmd; Command *cmdPtr; Tcl_HashTable *hiddenCmdTablePtr; Tcl_HashEntry *hPtr; int isNew; if (iPtr->flags & DELETED) { /* * The interpreter is being deleted. Do not create any new structures, * because it is not safe to modify the interpreter. */ return TCL_ERROR; } /* * Disallow hiding of commands that are currently in a namespace or * renaming (as part of hiding) into a namespace (because the current * implementation with a single global table and the needed uniqueness of * names cause problems with namespaces). * * We don't need to check for "::" in cmdName because the real check is on * the nsPtr below. * * hiddenCmdToken is just a string which is not interpreted in any way. It * may contain :: but the string is not interpreted as a namespace * qualifier command name. Thus, hiding foo::bar to foo::bar and then * trying to expose or invoke ::foo::bar will NOT work; but if the * application always uses the same strings it will get consistent * behaviour. * * But as we currently limit ourselves to the global namespace only for * the source, in order to avoid potential confusion, lets prevent "::" in * the token too. - dl */ if (strstr(hiddenCmdToken, "::") != NULL) { Tcl_AppendResult(interp, "cannot use namespace qualifiers in hidden command" " token (rename)", NULL); return TCL_ERROR; } /* * Find the command to hide. An error is returned if cmdName can't be * found. Look up the command only from the global namespace. Full path of * the command must be given if using namespaces. */ cmd = Tcl_FindCommand(interp, cmdName, NULL, /*flags*/ TCL_LEAVE_ERR_MSG | TCL_GLOBAL_ONLY); if (cmd == (Tcl_Command) NULL) { return TCL_ERROR; } cmdPtr = (Command *) cmd; /* * Check that the command is really in global namespace */ if (cmdPtr->nsPtr != iPtr->globalNsPtr) { Tcl_AppendResult(interp, "can only hide global namespace commands" " (use rename then hide)", NULL); return TCL_ERROR; } /* * Initialize the hidden command table if necessary. */ hiddenCmdTablePtr = iPtr->hiddenCmdTablePtr; if (hiddenCmdTablePtr == NULL) { hiddenCmdTablePtr = (Tcl_HashTable *) ckalloc((unsigned) sizeof(Tcl_HashTable)); Tcl_InitHashTable(hiddenCmdTablePtr, TCL_STRING_KEYS); iPtr->hiddenCmdTablePtr = hiddenCmdTablePtr; } /* * It is an error to move an exposed command to a hidden command with * hiddenCmdToken if a hidden command with the name hiddenCmdToken already * exists. */ hPtr = Tcl_CreateHashEntry(hiddenCmdTablePtr, hiddenCmdToken, &isNew); if (!isNew) { Tcl_AppendResult(interp, "hidden command named \"", hiddenCmdToken, "\" already exists", NULL); return TCL_ERROR; } /* * NB: This code is currently 'like' a rename to a specialy set apart name * table. Changes here and in TclRenameCommand must be kept in synch until * the common parts are actually factorized out. */ /* * Remove the hash entry for the command from the interpreter command * table. This is like deleting the command, so bump its command epoch; * this invalidates any cached references that point to the command. */ if (cmdPtr->hPtr != NULL) { Tcl_DeleteHashEntry(cmdPtr->hPtr); cmdPtr->hPtr = NULL; cmdPtr->cmdEpoch++; } /* * The list of command exported from the namespace might have changed. * However, we do not need to recompute this just yet; next time we need * the info will be soon enough. */ TclInvalidateNsCmdLookup(cmdPtr->nsPtr); /* * Now link the hash table entry with the command structure. We ensured * above that the nsPtr was right. */ cmdPtr->hPtr = hPtr; Tcl_SetHashValue(hPtr, cmdPtr); /* * If the command being hidden has a compile function, increment the * interpreter's compileEpoch to invalidate its compiled code. This makes * sure that we don't later try to execute old code compiled with * command-specific (i.e., inline) bytecodes for the now-hidden command. * This field is checked in Tcl_EvalObj and ObjInterpProc, and code whose * compilation epoch doesn't match is recompiled. */ if (cmdPtr->compileProc != NULL) { iPtr->compileEpoch++; } return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_ExposeCommand -- * * Makes a previously hidden command callable from inside the interpreter * instead of only by its ancestors. * * Results: * A standard Tcl result. If an error occurs, a message is left in the * interp's result. * * Side effects: * Moves commands from one hash table to another. * *---------------------------------------------------------------------- */ int Tcl_ExposeCommand( Tcl_Interp *interp, /* Interpreter in which to make command * callable. */ const char *hiddenCmdToken, /* Name of hidden command. */ const char *cmdName) /* Name of to-be-exposed command. */ { Interp *iPtr = (Interp *) interp; Command *cmdPtr; Namespace *nsPtr; Tcl_HashEntry *hPtr; Tcl_HashTable *hiddenCmdTablePtr; int isNew; if (iPtr->flags & DELETED) { /* * The interpreter is being deleted. Do not create any new structures, * because it is not safe to modify the interpreter. */ return TCL_ERROR; } /* * Check that we have a regular name for the command (that the user is not * trying to do an expose and a rename (to another namespace) at the same * time). */ if (strstr(cmdName, "::") != NULL) { Tcl_AppendResult(interp, "cannot expose to a namespace " "(use expose to toplevel, then rename)", NULL); return TCL_ERROR; } /* * Get the command from the hidden command table: */ hPtr = NULL; hiddenCmdTablePtr = iPtr->hiddenCmdTablePtr; if (hiddenCmdTablePtr != NULL) { hPtr = Tcl_FindHashEntry(hiddenCmdTablePtr, hiddenCmdToken); } if (hPtr == NULL) { Tcl_AppendResult(interp, "unknown hidden command \"", hiddenCmdToken, "\"", NULL); return TCL_ERROR; } cmdPtr = Tcl_GetHashValue(hPtr); /* * Check that we have a true global namespace command (enforced by * Tcl_HideCommand() but let's double check. (If it was not, we would not * really know how to handle it). */ if (cmdPtr->nsPtr != iPtr->globalNsPtr) { /* * This case is theoritically impossible, we might rather Tcl_Panic() * than 'nicely' erroring out ? */ Tcl_AppendResult(interp, "trying to expose a non global command name space command", NULL); return TCL_ERROR; } /* * This is the global table. */ nsPtr = cmdPtr->nsPtr; /* * It is an error to overwrite an existing exposed command as a result of * exposing a previously hidden command. */ hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, cmdName, &isNew); if (!isNew) { Tcl_AppendResult(interp, "exposed command \"", cmdName, "\" already exists", NULL); return TCL_ERROR; } /* * The list of command exported from the namespace might have changed. * However, we do not need to recompute this just yet; next time we need * the info will be soon enough. */ TclInvalidateNsCmdLookup(nsPtr); /* * Remove the hash entry for the command from the interpreter hidden * command table. */ if (cmdPtr->hPtr != NULL) { Tcl_DeleteHashEntry(cmdPtr->hPtr); cmdPtr->hPtr = NULL; } /* * Now link the hash table entry with the command structure. This is like * creating a new command, so deal with any shadowing of commands in the * global namespace. */ cmdPtr->hPtr = hPtr; Tcl_SetHashValue(hPtr, cmdPtr); /* * Not needed as we are only in the global namespace (but would be needed * again if we supported namespace command hiding) * * TclResetShadowedCmdRefs(interp, cmdPtr); */ /* * If the command being exposed has a compile function, increment * interpreter's compileEpoch to invalidate its compiled code. This makes * sure that we don't later try to execute old code compiled assuming the * command is hidden. This field is checked in Tcl_EvalObj and * ObjInterpProc, and code whose compilation epoch doesn't match is * recompiled. */ if (cmdPtr->compileProc != NULL) { iPtr->compileEpoch++; } return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_CreateCommand -- * * Define a new command in a command table. * * Results: * The return value is a token for the command, which can be used in * future calls to Tcl_GetCommandName. * * Side effects: * If a command named cmdName already exists for interp, it is deleted. * In the future, when cmdName is seen as the name of a command by * Tcl_Eval, proc will be called. To support the bytecode interpreter, * the command is created with a wrapper Tcl_ObjCmdProc * (TclInvokeStringCommand) that eventially calls proc. When the command * is deleted from the table, deleteProc will be called. See the manual * entry for details on the calling sequence. * *---------------------------------------------------------------------- */ Tcl_Command Tcl_CreateCommand( Tcl_Interp *interp, /* Token for command interpreter returned by a * previous call to Tcl_CreateInterp. */ const char *cmdName, /* Name of command. If it contains namespace * qualifiers, the new command is put in the * specified namespace; otherwise it is put in * the global namespace. */ Tcl_CmdProc *proc, /* Function to associate with cmdName. */ ClientData clientData, /* Arbitrary value passed to string proc. */ Tcl_CmdDeleteProc *deleteProc) /* If not NULL, gives a function to call when * this command is deleted. */ { Interp *iPtr = (Interp *) interp; ImportRef *oldRefPtr = NULL; Namespace *nsPtr, *dummy1, *dummy2; Command *cmdPtr, *refCmdPtr; Tcl_HashEntry *hPtr; const char *tail; int isNew; ImportedCmdData *dataPtr; if (iPtr->flags & DELETED) { /* * The interpreter is being deleted. Don't create any new commands; * it's not safe to muck with the interpreter anymore. */ return (Tcl_Command) NULL; } /* * Determine where the command should reside. If its name contains * namespace qualifiers, we put it in the specified namespace; otherwise, * we always put it in the global namespace. */ if (strstr(cmdName, "::") != NULL) { TclGetNamespaceForQualName(interp, cmdName, NULL, TCL_CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail); if ((nsPtr == NULL) || (tail == NULL)) { return (Tcl_Command) NULL; } } else { nsPtr = iPtr->globalNsPtr; tail = cmdName; } hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &isNew); if (!isNew) { /* * Command already exists. Delete the old one. Be careful to preserve * any existing import links so we can restore them down below. That * way, you can redefine a command and its import status will remain * intact. */ cmdPtr = Tcl_GetHashValue(hPtr); oldRefPtr = cmdPtr->importRefPtr; cmdPtr->importRefPtr = NULL; Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &isNew); if (!isNew) { /* * If the deletion callback recreated the command, just throw away * the new command (if we try to delete it again, we could get * stuck in an infinite loop). */ ckfree((char *) Tcl_GetHashValue(hPtr)); } } else { /* * The list of command exported from the namespace might have changed. * However, we do not need to recompute this just yet; next time we * need the info will be soon enough. */ TclInvalidateNsCmdLookup(nsPtr); TclInvalidateNsPath(nsPtr); } cmdPtr = (Command *) ckalloc(sizeof(Command)); Tcl_SetHashValue(hPtr, cmdPtr); cmdPtr->hPtr = hPtr; cmdPtr->nsPtr = nsPtr; cmdPtr->refCount = 1; cmdPtr->cmdEpoch = 0; cmdPtr->compileProc = NULL; cmdPtr->objProc = TclInvokeStringCommand; cmdPtr->objClientData = cmdPtr; cmdPtr->proc = proc; cmdPtr->clientData = clientData; cmdPtr->deleteProc = deleteProc; cmdPtr->deleteData = clientData; cmdPtr->flags = 0; cmdPtr->importRefPtr = NULL; cmdPtr->tracePtr = NULL; /* * Plug in any existing import references found above. Be sure to update * all of these references to point to the new command. */ if (oldRefPtr != NULL) { cmdPtr->importRefPtr = oldRefPtr; while (oldRefPtr != NULL) { refCmdPtr = oldRefPtr->importedCmdPtr; dataPtr = refCmdPtr->objClientData; dataPtr->realCmdPtr = cmdPtr; oldRefPtr = oldRefPtr->nextPtr; } } /* * We just created a command, so in its namespace and all of its parent * namespaces, it may shadow global commands with the same name. If any * shadowed commands are found, invalidate all cached command references * in the affected namespaces. */ TclResetShadowedCmdRefs(interp, cmdPtr); return (Tcl_Command) cmdPtr; }  /* *---------------------------------------------------------------------- * * Tcl_CreateObjCommand -- * * Define a new object-based command in a command table. * * Results: * The return value is a token for the command, which can be used in * future calls to Tcl_GetCommandName. * * Side effects: * If no command named "cmdName" already exists for interp, one is * created. Otherwise, if a command does exist, then if the object-based * Tcl_ObjCmdProc is TclInvokeStringCommand, we assume Tcl_CreateCommand * was called previously for the same command and just set its * Tcl_ObjCmdProc to the argument "proc"; otherwise, we delete the old * command. * * In the future, during bytecode evaluation when "cmdName" is seen as * the name of a command by Tcl_EvalObj or Tcl_Eval, the object-based * Tcl_ObjCmdProc proc will be called. When the command is deleted from * the table, deleteProc will be called. See the manual entry for details * on the calling sequence. * *---------------------------------------------------------------------- */ Tcl_Command Tcl_CreateObjCommand( Tcl_Interp *interp, /* Token for command interpreter (returned by * previous call to Tcl_CreateInterp). */ const char *cmdName, /* Name of command. If it contains namespace * qualifiers, the new command is put in the * specified namespace; otherwise it is put in * the global namespace. */ Tcl_ObjCmdProc *proc, /* Object-based function to associate with * name. */ ClientData clientData, /* Arbitrary value to pass to object * function. */ Tcl_CmdDeleteProc *deleteProc) /* If not NULL, gives a function to call when * this command is deleted. */ { Interp *iPtr = (Interp *) interp; ImportRef *oldRefPtr = NULL; Namespace *nsPtr, *dummy1, *dummy2; Command *cmdPtr, *refCmdPtr; Tcl_HashEntry *hPtr; const char *tail; int isNew; ImportedCmdData *dataPtr; if (iPtr->flags & DELETED) { /* * The interpreter is being deleted. Don't create any new commands; * it's not safe to muck with the interpreter anymore. */ return (Tcl_Command) NULL; } /* * Determine where the command should reside. If its name contains * namespace qualifiers, we put it in the specified namespace; otherwise, * we always put it in the global namespace. */ if (strstr(cmdName, "::") != NULL) { TclGetNamespaceForQualName(interp, cmdName, NULL, TCL_CREATE_NS_IF_UNKNOWN, &nsPtr, &dummy1, &dummy2, &tail); if ((nsPtr == NULL) || (tail == NULL)) { return (Tcl_Command) NULL; } } else { nsPtr = iPtr->globalNsPtr; tail = cmdName; } hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &isNew); TclInvalidateNsPath(nsPtr); if (!isNew) { cmdPtr = Tcl_GetHashValue(hPtr); /* * Command already exists. If its object-based Tcl_ObjCmdProc is * TclInvokeStringCommand, we just set its Tcl_ObjCmdProc to the * argument "proc". Otherwise, we delete the old command. */ if (cmdPtr->objProc == TclInvokeStringCommand) { cmdPtr->objProc = proc; cmdPtr->objClientData = clientData; cmdPtr->deleteProc = deleteProc; cmdPtr->deleteData = clientData; return (Tcl_Command) cmdPtr; } /* * Otherwise, we delete the old command. Be careful to preserve any * existing import links so we can restore them down below. That way, * you can redefine a command and its import status will remain * intact. */ oldRefPtr = cmdPtr->importRefPtr; cmdPtr->importRefPtr = NULL; Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr); hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &isNew); if (!isNew) { /* * If the deletion callback recreated the command, just throw away * the new command (if we try to delete it again, we could get * stuck in an infinite loop). */ ckfree(Tcl_GetHashValue(hPtr)); } } else { /* * The list of command exported from the namespace might have changed. * However, we do not need to recompute this just yet; next time we * need the info will be soon enough. */ TclInvalidateNsCmdLookup(nsPtr); } cmdPtr = (Command *) ckalloc(sizeof(Command)); Tcl_SetHashValue(hPtr, cmdPtr); cmdPtr->hPtr = hPtr; cmdPtr->nsPtr = nsPtr; cmdPtr->refCount = 1; cmdPtr->cmdEpoch = 0; cmdPtr->compileProc = NULL; cmdPtr->objProc = proc; cmdPtr->objClientData = clientData; cmdPtr->proc = TclInvokeObjectCommand; cmdPtr->clientData = cmdPtr; cmdPtr->deleteProc = deleteProc; cmdPtr->deleteData = clientData; cmdPtr->flags = 0; cmdPtr->importRefPtr = NULL; cmdPtr->tracePtr = NULL; /* * Plug in any existing import references found above. Be sure to update * all of these references to point to the new command. */ if (oldRefPtr != NULL) { cmdPtr->importRefPtr = oldRefPtr; while (oldRefPtr != NULL) { refCmdPtr = oldRefPtr->importedCmdPtr; dataPtr = refCmdPtr->objClientData; dataPtr->realCmdPtr = cmdPtr; oldRefPtr = oldRefPtr->nextPtr; } } /* * We just created a command, so in its namespace and all of its parent * namespaces, it may shadow global commands with the same name. If any * shadowed commands are found, invalidate all cached command references * in the affected namespaces. */ TclResetShadowedCmdRefs(interp, cmdPtr); return (Tcl_Command) cmdPtr; }  /* *---------------------------------------------------------------------- * * TclInvokeStringCommand -- * * "Wrapper" Tcl_ObjCmdProc used to call an existing string-based * Tcl_CmdProc if no object-based function exists for a command. A * pointer to this function is stored as the Tcl_ObjCmdProc in a Command * structure. It simply turns around and calls the string Tcl_CmdProc in * the Command structure. * * Results: * A standard Tcl object result value. * * Side effects: * Besides those side effects of the called Tcl_CmdProc, * TclInvokeStringCommand allocates and frees storage. * *---------------------------------------------------------------------- */ int TclInvokeStringCommand( ClientData clientData, /* Points to command's Command structure. */ Tcl_Interp *interp, /* Current interpreter. */ register int objc, /* Number of arguments. */ Tcl_Obj *const objv[]) /* Argument objects. */ { Command *cmdPtr = clientData; int i, result; const char **argv = (const char **) TclStackAlloc(interp, (unsigned)(objc + 1) * sizeof(char *)); for (i = 0; i < objc; i++) { argv[i] = Tcl_GetString(objv[i]); } argv[objc] = 0; /* * Invoke the command's string-based Tcl_CmdProc. */ result = (*cmdPtr->proc)(cmdPtr->clientData, interp, objc, argv); TclStackFree(interp, (void *) argv); return result; }  /* *---------------------------------------------------------------------- * * TclInvokeObjectCommand -- * * "Wrapper" Tcl_CmdProc used to call an existing object-based * Tcl_ObjCmdProc if no string-based function exists for a command. A * pointer to this function is stored as the Tcl_CmdProc in a Command * structure. It simply turns around and calls the object Tcl_ObjCmdProc * in the Command structure. * * Results: * A standard Tcl string result value. * * Side effects: * Besides those side effects of the called Tcl_CmdProc, * TclInvokeStringCommand allocates and frees storage. * *---------------------------------------------------------------------- */ int TclInvokeObjectCommand( ClientData clientData, /* Points to command's Command structure. */ Tcl_Interp *interp, /* Current interpreter. */ int argc, /* Number of arguments. */ register const char **argv) /* Argument strings. */ { Command *cmdPtr = (Command *) clientData; Tcl_Obj *objPtr; int i, length, result; Tcl_Obj **objv = (Tcl_Obj **) TclStackAlloc(interp, (unsigned)(argc * sizeof(Tcl_Obj *))); for (i = 0; i < argc; i++) { length = strlen(argv[i]); TclNewStringObj(objPtr, argv[i], length); Tcl_IncrRefCount(objPtr); objv[i] = objPtr; } /* * Invoke the command's object-based Tcl_ObjCmdProc. */ result = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, argc, objv); /* * Move the interpreter's object result to the string result, then reset * the object result. */ (void) Tcl_GetStringResult(interp); /* * Decrement the ref counts for the argument objects created above, then * free the objv array if malloc'ed storage was used. */ for (i = 0; i < argc; i++) { objPtr = objv[i]; Tcl_DecrRefCount(objPtr); } TclStackFree(interp, objv); return result; }  /* *---------------------------------------------------------------------- * * TclRenameCommand -- * * Called to give an existing Tcl command a different name. Both the old * command name and the new command name can have "::" namespace * qualifiers. If the new command has a different namespace context, the * command will be moved to that namespace and will execute in the * context of that new namespace. * * If the new command name is NULL or the null string, the command is * deleted. * * Results: * Returns TCL_OK if successful, and TCL_ERROR if anything goes wrong. * * Side effects: * If anything goes wrong, an error message is returned in the * interpreter's result object. * *---------------------------------------------------------------------- */ int TclRenameCommand( Tcl_Interp *interp, /* Current interpreter. */ const char *oldName, /* Existing command name. */ const char *newName) /* New command name. */ { Interp *iPtr = (Interp *) interp; const char *newTail; Namespace *cmdNsPtr, *newNsPtr, *dummy1, *dummy2; Tcl_Command cmd; Command *cmdPtr; Tcl_HashEntry *hPtr, *oldHPtr; int isNew, result; Tcl_Obj *oldFullName; Tcl_DString newFullName; /* * Find the existing command. An error is returned if cmdName can't be * found. */ cmd = Tcl_FindCommand(interp, oldName, NULL, /*flags*/ 0); cmdPtr = (Command *) cmd; if (cmdPtr == NULL) { Tcl_AppendResult(interp, "can't ", ((newName == NULL)||(*newName == '\0'))? "delete":"rename", " \"", oldName, "\": command doesn't exist", NULL); return TCL_ERROR; } cmdNsPtr = cmdPtr->nsPtr; oldFullName = Tcl_NewObj(); Tcl_IncrRefCount(oldFullName); Tcl_GetCommandFullName(interp, cmd, oldFullName); /* * If the new command name is NULL or empty, delete the command. Do this * with Tcl_DeleteCommandFromToken, since we already have the command. */ if ((newName == NULL) || (*newName == '\0')) { Tcl_DeleteCommandFromToken(interp, cmd); result = TCL_OK; goto done; } /* * Make sure that the destination command does not already exist. The * rename operation is like creating a command, so we should automatically * create the containing namespaces just like Tcl_CreateCommand would. */ TclGetNamespaceForQualName(interp, newName, NULL, TCL_CREATE_NS_IF_UNKNOWN, &newNsPtr, &dummy1, &dummy2, &newTail); if ((newNsPtr == NULL) || (newTail == NULL)) { Tcl_AppendResult(interp, "can't rename to \"", newName, "\": bad command name", NULL); result = TCL_ERROR; goto done; } if (Tcl_FindHashEntry(&newNsPtr->cmdTable, newTail) != NULL) { Tcl_AppendResult(interp, "can't rename to \"", newName, "\": command already exists", NULL); result = TCL_ERROR; goto done; } /* * Warning: any changes done in the code here are likely to be needed in * Tcl_HideCommand() code too (until the common parts are extracted out). * - dl */ /* * Put the command in the new namespace so we can check for an alias loop. * Since we are adding a new command to a namespace, we must handle any * shadowing of the global commands that this might create. */ oldHPtr = cmdPtr->hPtr; hPtr = Tcl_CreateHashEntry(&newNsPtr->cmdTable, newTail, &isNew); Tcl_SetHashValue(hPtr, cmdPtr); cmdPtr->hPtr = hPtr; cmdPtr->nsPtr = newNsPtr; TclResetShadowedCmdRefs(interp, cmdPtr); /* * Now check for an alias loop. If we detect one, put everything back the * way it was and report the error. */ result = TclPreventAliasLoop(interp, interp, (Tcl_Command) cmdPtr); if (result != TCL_OK) { Tcl_DeleteHashEntry(cmdPtr->hPtr); cmdPtr->hPtr = oldHPtr; cmdPtr->nsPtr = cmdNsPtr; goto done; } /* * The list of command exported from the namespace might have changed. * However, we do not need to recompute this just yet; next time we need * the info will be soon enough. These might refer to the same variable, * but that's no big deal. */ TclInvalidateNsCmdLookup(cmdNsPtr); TclInvalidateNsCmdLookup(cmdPtr->nsPtr); /* * Script for rename traces can delete the command "oldName". Therefore * increment the reference count for cmdPtr so that it's Command structure * is freed only towards the end of this function by calling * TclCleanupCommand. * * The trace function needs to get a fully qualified name for old and new * commands [Tcl bug #651271], or else there's no way for the trace * function to get the namespace from which the old command is being * renamed! */ Tcl_DStringInit(&newFullName); Tcl_DStringAppend(&newFullName, newNsPtr->fullName, -1); if (newNsPtr != iPtr->globalNsPtr) { Tcl_DStringAppend(&newFullName, "::", 2); } Tcl_DStringAppend(&newFullName, newTail, -1); cmdPtr->refCount++; CallCommandTraces(iPtr, cmdPtr, Tcl_GetString(oldFullName), Tcl_DStringValue(&newFullName), TCL_TRACE_RENAME); Tcl_DStringFree(&newFullName); /* * The new command name is okay, so remove the command from its current * namespace. This is like deleting the command, so bump the cmdEpoch to * invalidate any cached references to the command. */ Tcl_DeleteHashEntry(oldHPtr); cmdPtr->cmdEpoch++; /* * If the command being renamed has a compile function, increment the * interpreter's compileEpoch to invalidate its compiled code. This makes * sure that we don't later try to execute old code compiled for the * now-renamed command. */ if (cmdPtr->compileProc != NULL) { iPtr->compileEpoch++; } /* * Now free the Command structure, if the "oldName" command has been * deleted by invocation of rename traces. */ TclCleanupCommandMacro(cmdPtr); result = TCL_OK; done: TclDecrRefCount(oldFullName); return result; }  /* *---------------------------------------------------------------------- * * Tcl_SetCommandInfo -- * * Modifies various information about a Tcl command. Note that this * function will not change a command's namespace; use TclRenameCommand * to do that. Also, the isNativeObjectProc member of *infoPtr is * ignored. * * Results: * If cmdName exists in interp, then the information at *infoPtr is * stored with the command in place of the current information and 1 is * returned. If the command doesn't exist then 0 is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_SetCommandInfo( Tcl_Interp *interp, /* Interpreter in which to look for * command. */ const char *cmdName, /* Name of desired command. */ const Tcl_CmdInfo *infoPtr) /* Where to find information to store in the * command. */ { Tcl_Command cmd; cmd = Tcl_FindCommand(interp, cmdName, NULL, /*flags*/ 0); return Tcl_SetCommandInfoFromToken(cmd, infoPtr); }  /* *---------------------------------------------------------------------- * * Tcl_SetCommandInfoFromToken -- * * Modifies various information about a Tcl command. Note that this * function will not change a command's namespace; use TclRenameCommand * to do that. Also, the isNativeObjectProc member of *infoPtr is * ignored. * * Results: * If cmdName exists in interp, then the information at *infoPtr is * stored with the command in place of the current information and 1 is * returned. If the command doesn't exist then 0 is returned. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_SetCommandInfoFromToken( Tcl_Command cmd, const Tcl_CmdInfo *infoPtr) { Command *cmdPtr; /* Internal representation of the command */ if (cmd == (Tcl_Command) NULL) { return 0; } /* * The isNativeObjectProc and nsPtr members of *infoPtr are ignored. */ cmdPtr = (Command *) cmd; cmdPtr->proc = infoPtr->proc; cmdPtr->clientData = infoPtr->clientData; if (infoPtr->objProc == NULL) { cmdPtr->objProc = TclInvokeStringCommand; cmdPtr->objClientData = cmdPtr; } else { cmdPtr->objProc = infoPtr->objProc; cmdPtr->objClientData = infoPtr->objClientData; } cmdPtr->deleteProc = infoPtr->deleteProc; cmdPtr->deleteData = infoPtr->deleteData; return 1; }  /* *---------------------------------------------------------------------- * * Tcl_GetCommandInfo -- * * Returns various information about a Tcl command. * * Results: * If cmdName exists in interp, then *infoPtr is modified to hold * information about cmdName and 1 is returned. If the command doesn't * exist then 0 is returned and *infoPtr isn't modified. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_GetCommandInfo( Tcl_Interp *interp, /* Interpreter in which to look for * command. */ const char *cmdName, /* Name of desired command. */ Tcl_CmdInfo *infoPtr) /* Where to store information about * command. */ { Tcl_Command cmd; cmd = Tcl_FindCommand(interp, cmdName, NULL, /*flags*/ 0); return Tcl_GetCommandInfoFromToken(cmd, infoPtr); }  /* *---------------------------------------------------------------------- * * Tcl_GetCommandInfoFromToken -- * * Returns various information about a Tcl command. * * Results: * Copies information from the command identified by 'cmd' into a * caller-supplied structure and returns 1. If the 'cmd' is NULL, leaves * the structure untouched and returns 0. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_GetCommandInfoFromToken( Tcl_Command cmd, Tcl_CmdInfo *infoPtr) { Command *cmdPtr; /* Internal representation of the command */ if (cmd == (Tcl_Command) NULL) { return 0; } /* * Set isNativeObjectProc 1 if objProc was registered by a call to * Tcl_CreateObjCommand. Otherwise set it to 0. */ cmdPtr = (Command *) cmd; infoPtr->isNativeObjectProc = (cmdPtr->objProc != TclInvokeStringCommand); infoPtr->objProc = cmdPtr->objProc; infoPtr->objClientData = cmdPtr->objClientData; infoPtr->proc = cmdPtr->proc; infoPtr->clientData = cmdPtr->clientData; infoPtr->deleteProc = cmdPtr->deleteProc; infoPtr->deleteData = cmdPtr->deleteData; infoPtr->namespacePtr = (Tcl_Namespace *) cmdPtr->nsPtr; return 1; }  /* *---------------------------------------------------------------------- * * Tcl_GetCommandName -- * * Given a token returned by Tcl_CreateCommand, this function returns the * current name of the command (which may have changed due to renaming). * * Results: * The return value is the name of the given command. * * Side effects: * None. * *---------------------------------------------------------------------- */ const char * Tcl_GetCommandName( Tcl_Interp *interp, /* Interpreter containing the command. */ Tcl_Command command) /* Token for command returned by a previous * call to Tcl_CreateCommand. The command must * not have been deleted. */ { Command *cmdPtr = (Command *) command; if ((cmdPtr == NULL) || (cmdPtr->hPtr == NULL)) { /* * This should only happen if command was "created" after the * interpreter began to be deleted, so there isn't really any command. * Just return an empty string. */ return ""; } return Tcl_GetHashKey(cmdPtr->hPtr->tablePtr, cmdPtr->hPtr); }  /* *---------------------------------------------------------------------- * * Tcl_GetCommandFullName -- * * Given a token returned by, e.g., Tcl_CreateCommand or Tcl_FindCommand, * this function appends to an object the command's full name, qualified * by a sequence of parent namespace names. The command's fully-qualified * name may have changed due to renaming. * * Results: * None. * * Side effects: * The command's fully-qualified name is appended to the string * representation of objPtr. * *---------------------------------------------------------------------- */ void Tcl_GetCommandFullName( Tcl_Interp *interp, /* Interpreter containing the command. */ Tcl_Command command, /* Token for command returned by a previous * call to Tcl_CreateCommand. The command must * not have been deleted. */ Tcl_Obj *objPtr) /* Points to the object onto which the * command's full name is appended. */ { Interp *iPtr = (Interp *) interp; register Command *cmdPtr = (Command *) command; char *name; /* * Add the full name of the containing namespace, followed by the "::" * separator, and the command name. */ if (cmdPtr != NULL) { if (cmdPtr->nsPtr != NULL) { Tcl_AppendToObj(objPtr, cmdPtr->nsPtr->fullName, -1); if (cmdPtr->nsPtr != iPtr->globalNsPtr) { Tcl_AppendToObj(objPtr, "::", 2); } } if (cmdPtr->hPtr != NULL) { name = Tcl_GetHashKey(cmdPtr->hPtr->tablePtr, cmdPtr->hPtr); Tcl_AppendToObj(objPtr, name, -1); } } }  /* *---------------------------------------------------------------------- * * Tcl_DeleteCommand -- * * Remove the given command from the given interpreter. * * Results: * 0 is returned if the command was deleted successfully. -1 is returned * if there didn't exist a command by that name. * * Side effects: * cmdName will no longer be recognized as a valid command for interp. * *---------------------------------------------------------------------- */ int Tcl_DeleteCommand( Tcl_Interp *interp, /* Token for command interpreter (returned by * a previous Tcl_CreateInterp call). */ const char *cmdName) /* Name of command to remove. */ { Tcl_Command cmd; /* * Find the desired command and delete it. */ cmd = Tcl_FindCommand(interp, cmdName, NULL, /*flags*/ 0); if (cmd == (Tcl_Command) NULL) { return -1; } return Tcl_DeleteCommandFromToken(interp, cmd); }  /* *---------------------------------------------------------------------- * * Tcl_DeleteCommandFromToken -- * * Removes the given command from the given interpreter. This function * resembles Tcl_DeleteCommand, but takes a Tcl_Command token instead of * a command name for efficiency. * * Results: * 0 is returned if the command was deleted successfully. -1 is returned * if there didn't exist a command by that name. * * Side effects: * The command specified by "cmd" will no longer be recognized as a valid * command for "interp". * *---------------------------------------------------------------------- */ int Tcl_DeleteCommandFromToken( Tcl_Interp *interp, /* Token for command interpreter returned by a * previous call to Tcl_CreateInterp. */ Tcl_Command cmd) /* Token for command to delete. */ { Interp *iPtr = (Interp *) interp; Command *cmdPtr = (Command *) cmd; ImportRef *refPtr, *nextRefPtr; Tcl_Command importCmd; /* * Bump the command epoch counter. This will invalidate all cached * references that point to this command. */ cmdPtr->cmdEpoch++; /* * The code here is tricky. We can't delete the hash table entry before * invoking the deletion callback because there are cases where the * deletion callback needs to invoke the command (e.g. object systems such * as OTcl). However, this means that the callback could try to delete or * rename the command. The deleted flag allows us to detect these cases * and skip nested deletes. */ if (cmdPtr->flags & CMD_IS_DELETED) { /* * Another deletion is already in progress. Remove the hash table * entry now, but don't invoke a callback or free the command * structure. Take care to only remove the hash entry if it has not * already been removed; otherwise if we manage to hit this function * three times, everything goes up in smoke. [Bug 1220058] */ if (cmdPtr->hPtr != NULL) { Tcl_DeleteHashEntry(cmdPtr->hPtr); cmdPtr->hPtr = NULL; } return 0; } /* * We must delete this command, even though both traces and delete procs * may try to avoid this (renaming the command etc). Also traces and * delete procs may try to delete the command themsevles. This flag * declares that a delete is in progress and that recursive deletes should * be ignored. */ cmdPtr->flags |= CMD_IS_DELETED; /* * Call trace functions for the command being deleted. Then delete its * traces. */ if (cmdPtr->tracePtr != NULL) { CommandTrace *tracePtr; CallCommandTraces(iPtr,cmdPtr,NULL,NULL,TCL_TRACE_DELETE); /* * Now delete these traces. */ tracePtr = cmdPtr->tracePtr; while (tracePtr != NULL) { CommandTrace *nextPtr = tracePtr->nextPtr; if ((--tracePtr->refCount) <= 0) { ckfree((char *) tracePtr); } tracePtr = nextPtr; } cmdPtr->tracePtr = NULL; } /* * The list of command exported from the namespace might have changed. * However, we do not need to recompute this just yet; next time we need * the info will be soon enough. */ TclInvalidateNsCmdLookup(cmdPtr->nsPtr); /* * If the command being deleted has a compile function, increment the * interpreter's compileEpoch to invalidate its compiled code. This makes * sure that we don't later try to execute old code compiled with * command-specific (i.e., inline) bytecodes for the now-deleted command. * This field is checked in Tcl_EvalObj and ObjInterpProc, and code whose * compilation epoch doesn't match is recompiled. */ if (cmdPtr->compileProc != NULL) { iPtr->compileEpoch++; } if (cmdPtr->deleteProc != NULL) { /* * Delete the command's client data. If this was an imported command * created when a command was imported into a namespace, this client * data will be a pointer to a ImportedCmdData structure describing * the "real" command that this imported command refers to. */ /* * If you are getting a crash during the call to deleteProc and * cmdPtr->deleteProc is a pointer to the function free(), the most * likely cause is that your extension allocated memory for the * clientData argument to Tcl_CreateObjCommand() with the ckalloc() * macro and you are now trying to deallocate this memory with free() * instead of ckfree(). You should pass a pointer to your own method * that calls ckfree(). */ (*cmdPtr->deleteProc)(cmdPtr->deleteData); } /* * If this command was imported into other namespaces, then imported * commands were created that refer back to this command. Delete these * imported commands now. */ for (refPtr = cmdPtr->importRefPtr; refPtr != NULL; refPtr = nextRefPtr) { nextRefPtr = refPtr->nextPtr; importCmd = (Tcl_Command) refPtr->importedCmdPtr; Tcl_DeleteCommandFromToken(interp, importCmd); } /* * Don't use hPtr to delete the hash entry here, because it's possible * that the deletion callback renamed the command. Instead, use * cmdPtr->hptr, and make sure that no-one else has already deleted the * hash entry. */ if (cmdPtr->hPtr != NULL) { Tcl_DeleteHashEntry(cmdPtr->hPtr); cmdPtr->hPtr = NULL; } /* * Mark the Command structure as no longer valid. This allows * TclExecuteByteCode to recognize when a Command has logically been * deleted and a pointer to this Command structure cached in a CmdName * object is invalid. TclExecuteByteCode will look up the command again in * the interpreter's command hashtable. */ cmdPtr->objProc = NULL; /* * Now free the Command structure, unless there is another reference to it * from a CmdName Tcl object in some ByteCode code sequence. In that case, * delay the cleanup until all references are either discarded (when a * ByteCode is freed) or replaced by a new reference (when a cached * CmdName Command reference is found to be invalid and TclExecuteByteCode * looks up the command in the command hashtable). */ TclCleanupCommandMacro(cmdPtr); return 0; }  static char * CallCommandTraces( Interp *iPtr, /* Interpreter containing command. */ Command *cmdPtr, /* Command whose traces are to be invoked. */ const char *oldName, /* Command's old name, or NULL if we must get * the name from cmdPtr */ const char *newName, /* Command's new name, or NULL if the command * is not being renamed */ int flags) /* Flags indicating the type of traces to * trigger, either TCL_TRACE_DELETE or * TCL_TRACE_RENAME. */ { register CommandTrace *tracePtr; ActiveCommandTrace active; char *result; Tcl_Obj *oldNamePtr = NULL; Tcl_InterpState state = NULL; if (cmdPtr->flags & CMD_TRACE_ACTIVE) { /* * While a rename trace is active, we will not process any more rename * traces; while a delete trace is active we will never reach here - * because Tcl_DeleteCommandFromToken checks for the condition * (cmdPtr->flags & CMD_IS_DELETED) and returns immediately when a * command deletion is in progress. For all other traces, delete * traces will not be invoked but a call to TraceCommandProc will * ensure that tracePtr->clientData is freed whenever the command * "oldName" is deleted. */ if (cmdPtr->flags & TCL_TRACE_RENAME) { flags &= ~TCL_TRACE_RENAME; } if (flags == 0) { return NULL; } } cmdPtr->flags |= CMD_TRACE_ACTIVE; cmdPtr->refCount++; result = NULL; active.nextPtr = iPtr->activeCmdTracePtr; active.reverseScan = 0; iPtr->activeCmdTracePtr = &active; if (flags & TCL_TRACE_DELETE) { flags |= TCL_TRACE_DESTROYED; } active.cmdPtr = cmdPtr; Tcl_Preserve(iPtr); for (tracePtr = cmdPtr->tracePtr; tracePtr != NULL; tracePtr = active.nextTracePtr) { active.nextTracePtr = tracePtr->nextPtr; if (!(tracePtr->flags & flags)) { continue; } cmdPtr->flags |= tracePtr->flags; if (oldName == NULL) { TclNewObj(oldNamePtr); Tcl_IncrRefCount(oldNamePtr); Tcl_GetCommandFullName((Tcl_Interp *) iPtr, (Tcl_Command) cmdPtr, oldNamePtr); oldName = TclGetString(oldNamePtr); } tracePtr->refCount++; if (state == NULL) { state = Tcl_SaveInterpState((Tcl_Interp *) iPtr, TCL_OK); } (*tracePtr->traceProc)(tracePtr->clientData, (Tcl_Interp *) iPtr, oldName, newName, flags); cmdPtr->flags &= ~tracePtr->flags; if ((--tracePtr->refCount) <= 0) { ckfree((char *) tracePtr); } } if (state) { Tcl_RestoreInterpState((Tcl_Interp *) iPtr, state); } /* * If a new object was created to hold the full oldName, free it now. */ if (oldNamePtr != NULL) { TclDecrRefCount(oldNamePtr); } /* * Restore the variable's flags, remove the record of our active traces, * and then return. */ cmdPtr->flags &= ~CMD_TRACE_ACTIVE; cmdPtr->refCount--; iPtr->activeCmdTracePtr = active.nextPtr; Tcl_Release(iPtr); return result; } /* *---------------------------------------------------------------------- * * GetCommandSource -- * * This function returns a Tcl_Obj with the full source string for the * command. This insures that traces get a correct NUL-terminated command * string. * *---------------------------------------------------------------------- */ static Tcl_Obj * GetCommandSource( Interp *iPtr, const char *command, int numChars, int objc, Tcl_Obj *const objv[]) { if (!command) { return Tcl_NewListObj(objc, objv); } if (command == (char *) -1) { command = TclGetSrcInfoForCmd(iPtr, &numChars); } return Tcl_NewStringObj(command, numChars); }  /* *---------------------------------------------------------------------- * * TclCleanupCommand -- * * This function frees up a Command structure unless it is still * referenced from an interpreter's command hashtable or from a CmdName * Tcl object representing the name of a command in a ByteCode * instruction sequence. * * Results: * None. * * Side effects: * Memory gets freed unless a reference to the Command structure still * exists. In that case the cleanup is delayed until the command is * deleted or when the last ByteCode referring to it is freed. * *---------------------------------------------------------------------- */ void TclCleanupCommand( register Command *cmdPtr) /* Points to the Command structure to * be freed. */ { cmdPtr->refCount--; if (cmdPtr->refCount <= 0) { ckfree((char *) cmdPtr); } }  /* *---------------------------------------------------------------------- * * Tcl_CreateMathFunc -- * * Creates a new math function for expressions in a given interpreter. * * Results: * None. * * Side effects: * The Tcl function defined by "name" is created or redefined. If the * function already exists then its definition is replaced; this includes * the builtin functions. Redefining a builtin function forces all * existing code to be invalidated since that code may be compiled using * an instruction specific to the replaced function. In addition, * redefioning a non-builtin function will force existing code to be * invalidated if the number of arguments has changed. * *---------------------------------------------------------------------- */ void Tcl_CreateMathFunc( Tcl_Interp *interp, /* Interpreter in which function is to be * available. */ const char *name, /* Name of function (e.g. "sin"). */ int numArgs, /* Nnumber of arguments required by * function. */ Tcl_ValueType *argTypes, /* Array of types acceptable for each * argument. */ Tcl_MathProc *proc, /* C function that implements the math * function. */ ClientData clientData) /* Additional value to pass to the * function. */ { Tcl_DString bigName; OldMathFuncData *data = (OldMathFuncData *) ckalloc(sizeof(OldMathFuncData)); data->proc = proc; data->numArgs = numArgs; data->argTypes = (Tcl_ValueType *) ckalloc(numArgs * sizeof(Tcl_ValueType)); memcpy(data->argTypes, argTypes, numArgs * sizeof(Tcl_ValueType)); data->clientData = clientData; Tcl_DStringInit(&bigName); Tcl_DStringAppend(&bigName, "::tcl::mathfunc::", -1); Tcl_DStringAppend(&bigName, name, -1); Tcl_CreateObjCommand(interp, Tcl_DStringValue(&bigName), OldMathFuncProc, data, OldMathFuncDeleteProc); Tcl_DStringFree(&bigName); }  /* *---------------------------------------------------------------------- * * OldMathFuncProc -- * * Dispatch to a math function created with Tcl_CreateMathFunc * * Results: * Returns a standard Tcl result. * * Side effects: * Whatever the math function does. * *---------------------------------------------------------------------- */ static int OldMathFuncProc( ClientData clientData, /* Ponter to OldMathFuncData describing the * function being called */ Tcl_Interp *interp, /* Tcl interpreter */ int objc, /* Actual parameter count */ Tcl_Obj *const *objv) /* Parameter vector */ { Tcl_Obj *valuePtr; OldMathFuncData *dataPtr = clientData; Tcl_Value funcResult, *args; int result; int j, k; double d; /* * Check argument count. */ if (objc != dataPtr->numArgs + 1) { MathFuncWrongNumArgs(interp, dataPtr->numArgs+1, objc, objv); return TCL_ERROR; } /* * Convert arguments from Tcl_Obj's to Tcl_Value's. */ args = (Tcl_Value *) TclStackAlloc(interp, dataPtr->numArgs * sizeof(Tcl_Value)); for (j = 1, k = 0; j < objc; ++j, ++k) { /* TODO: Convert to TclGetNumberFromObj() ? */ valuePtr = objv[j]; result = Tcl_GetDoubleFromObj(NULL, valuePtr, &d); #ifdef ACCEPT_NAN if ((result != TCL_OK) && (valuePtr->typePtr == &tclDoubleType)) { d = valuePtr->internalRep.doubleValue; result = TCL_OK; } #endif if (result != TCL_OK) { /* * We have a non-numeric argument. */ Tcl_SetObjResult(interp, Tcl_NewStringObj( "argument to math function didn't have numeric value",-1)); TclCheckBadOctal(interp, Tcl_GetString(valuePtr)); TclStackFree(interp, args); return TCL_ERROR; } /* * Copy the object's numeric value to the argument record, converting * it if necessary. * * NOTE: no bignum support; use the new mathfunc interface for that. */ args[k].type = dataPtr->argTypes[k]; switch (args[k].type) { case TCL_EITHER: if (Tcl_GetLongFromObj(NULL, valuePtr, &(args[k].intValue)) == TCL_OK) { args[k].type = TCL_INT; break; } if (Tcl_GetWideIntFromObj(interp, valuePtr, &(args[k].wideValue)) == TCL_OK) { args[k].type = TCL_WIDE_INT; break; } args[k].type = TCL_DOUBLE; /* FALLTHROUGH */ case TCL_DOUBLE: args[k].doubleValue = d; break; case TCL_INT: if (ExprIntFunc(NULL, interp, 2, &(objv[j-1])) != TCL_OK) { TclStackFree(interp, args); return TCL_ERROR; } valuePtr = Tcl_GetObjResult(interp); Tcl_GetLongFromObj(NULL, valuePtr, &(args[k].intValue)); Tcl_ResetResult(interp); break; case TCL_WIDE_INT: if (ExprWideFunc(NULL, interp, 2, &(objv[j-1])) != TCL_OK) { TclStackFree(interp, args); return TCL_ERROR; } valuePtr = Tcl_GetObjResult(interp); Tcl_GetWideIntFromObj(NULL, valuePtr, &(args[k].wideValue)); Tcl_ResetResult(interp); break; } } /* * Call the function. */ errno = 0; result = (*dataPtr->proc)(dataPtr->clientData, interp, args, &funcResult); TclStackFree(interp, args); if (result != TCL_OK) { return result; } /* * Return the result of the call. */ if (funcResult.type == TCL_INT) { TclNewLongObj(valuePtr, funcResult.intValue); } else if (funcResult.type == TCL_WIDE_INT) { valuePtr = Tcl_NewWideIntObj(funcResult.wideValue); } else { return CheckDoubleResult(interp, funcResult.doubleValue); } Tcl_SetObjResult(interp, valuePtr); return TCL_OK; }  /* *---------------------------------------------------------------------- * * OldMathFuncDeleteProc -- * * Cleans up after deleting a math function registered with * Tcl_CreateMathFunc * * Results: * None. * * Side effects: * Frees allocated memory. * *---------------------------------------------------------------------- */ static void OldMathFuncDeleteProc( ClientData clientData) { OldMathFuncData *dataPtr = clientData; ckfree((void *) dataPtr->argTypes); ckfree((void *) dataPtr); }  /* *---------------------------------------------------------------------- * * Tcl_GetMathFuncInfo -- * * Discovers how a particular math function was created in a given * interpreter. * * Results: * TCL_OK if it succeeds, TCL_ERROR else (leaving an error message in the * interpreter result if that happens.) * * Side effects: * If this function succeeds, the variables pointed to by the numArgsPtr * and argTypePtr arguments will be updated to detail the arguments * allowed by the function. The variable pointed to by the procPtr * argument will be set to NULL if the function is a builtin function, * and will be set to the address of the C function used to implement the * math function otherwise (in which case the variable pointed to by the * clientDataPtr argument will also be updated.) * *---------------------------------------------------------------------- */ int Tcl_GetMathFuncInfo( Tcl_Interp *interp, const char *name, int *numArgsPtr, Tcl_ValueType **argTypesPtr, Tcl_MathProc **procPtr, ClientData *clientDataPtr) { Tcl_Obj *cmdNameObj; Command *cmdPtr; /* * Get the command that implements the math function. */ TclNewLiteralStringObj(cmdNameObj, "tcl::mathfunc::"); Tcl_AppendToObj(cmdNameObj, name, -1); Tcl_IncrRefCount(cmdNameObj); cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, cmdNameObj); Tcl_DecrRefCount(cmdNameObj); /* * Report unknown functions. */ if (cmdPtr == NULL) { Tcl_Obj *message; TclNewLiteralStringObj(message, "unknown math function \""); Tcl_AppendToObj(message, name, -1); Tcl_AppendToObj(message, "\"", 1); Tcl_SetObjResult(interp, message); *numArgsPtr = -1; *argTypesPtr = NULL; *procPtr = NULL; *clientDataPtr = NULL; return TCL_ERROR; } /* * Retrieve function info for user defined functions; return dummy * information for builtins. */ if (cmdPtr->objProc == &OldMathFuncProc) { OldMathFuncData *dataPtr = cmdPtr->clientData; *procPtr = dataPtr->proc; *numArgsPtr = dataPtr->numArgs; *argTypesPtr = dataPtr->argTypes; *clientDataPtr = dataPtr->clientData; } else { *procPtr = NULL; *numArgsPtr = -1; *argTypesPtr = NULL; *procPtr = NULL; *clientDataPtr = NULL; } return TCL_OK; }  /* *---------------------------------------------------------------------- * * Tcl_ListMathFuncs -- * * Produces a list of all the math functions defined in a given * interpreter. * * Results: * A pointer to a Tcl_Obj structure with a reference count of zero, or * NULL in the case of an error (in which case a suitable error message * will be left in the interpreter result.) * * Side effects: * None. * *---------------------------------------------------------------------- */ Tcl_Obj * Tcl_ListMathFuncs( Tcl_Interp *interp, const char *pattern) { Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); Namespace *nsPtr; Namespace *dummy1NsPtr; Namespace *dummy2NsPtr; const char *dummyNamePtr; Tcl_Obj *result = Tcl_NewObj(); TclGetNamespaceForQualName(interp, "::tcl::mathfunc", globalNsPtr, TCL_FIND_ONLY_NS | TCL_GLOBAL_ONLY, &nsPtr, &dummy1NsPtr, &dummy2NsPtr, &dummyNamePtr); if (nsPtr == NULL) { return result; } if ((pattern != NULL) && TclMatchIsTrivial(pattern)) { if (Tcl_FindHashEntry(&nsPtr->cmdTable, pattern) != NULL) { Tcl_ListObjAppendElement(NULL, result, Tcl_NewStringObj(pattern, -1)); } } else { Tcl_HashSearch cmdHashSearch; Tcl_HashEntry *cmdHashEntry = Tcl_FirstHashEntry(&nsPtr->cmdTable,&cmdHashSearch); for (; cmdHashEntry != NULL; cmdHashEntry = Tcl_NextHashEntry(&cmdHashSearch)) { const char *cmdNamePtr = Tcl_GetHashKey(&nsPtr->cmdTable, cmdHashEntry); if (pattern == NULL || Tcl_StringMatch(cmdNamePtr, pattern)) { Tcl_ListObjAppendElement(NULL, result, Tcl_NewStringObj(cmdNamePtr, -1)); } } } return result; }  /* *---------------------------------------------------------------------- * * TclInterpReady -- * * Check if an interpreter is ready to eval commands or scripts, i.e., if * it was not deleted and if the nesting level is not too high. * * Results: * The return value is TCL_OK if it the interpreter is ready, TCL_ERROR * otherwise. * * Side effects: * The interpreters object and string results are cleared. * *---------------------------------------------------------------------- */ int TclInterpReady( Tcl_Interp *interp) { int localInt; /* used for checking the stack */ register Interp *iPtr = (Interp *) interp; /* * Reset both the interpreter's string and object results and clear out * any previous error information. */ Tcl_ResetResult(interp); /* * If the interpreter has been deleted, return an error. */ if (iPtr->flags & DELETED) { Tcl_ResetResult(interp); Tcl_AppendResult(interp, "attempt to call eval in deleted interpreter", NULL); Tcl_SetErrorCode(interp, "TCL", "IDELETE", "attempt to call eval in deleted interpreter", NULL); return TCL_ERROR; } /* * Check depth of nested calls to Tcl_Eval: if this gets too large, it's * probably because of an infinite loop somewhere. */ if (((iPtr->numLevels) <= iPtr->maxNestingDepth) && CheckCStack(iPtr, &localInt)) { return TCL_OK; } if (!CheckCStack(iPtr, &localInt)) { Tcl_AppendResult(interp, "out of stack space (infinite loop?)", NULL); } else { Tcl_AppendResult(interp, "too many nested evaluations (infinite loop?)", NULL); } return TCL_ERROR; }  /* *---------------------------------------------------------------------- * * TclEvalObjvInternal * * This function evaluates a Tcl command that has already been parsed * into words, with one Tcl_Obj holding each word. The caller is * responsible for managing the iPtr->numLevels. * * TclEvalObjvInternal is the backend for Tcl_EvalObjv, the bytecode * engine also calls it directly. * * Results: * The return value is a standard Tcl completion code such as TCL_OK or * TCL_ERROR. A result or error message is left in interp's result. If an * error occurs, this function does NOT add any information to the * errorInfo variable. * * Side effects: * Depends on the command. * *---------------------------------------------------------------------- */ int TclEvalObjvInternal( Tcl_Interp *interp, /* Interpreter in which to evaluate the * command. Also used for error reporting. */ int objc, /* Number of words in command. */ Tcl_Obj *const objv[], /* An array of pointers to objects that are * the words that make up the command. */ const char *command, /* Points to the beginning of the string * representation of the command; this is used * for traces. NULL if the string * representation of the command is unknown is * to be generated from (objc,objv), -1 if it * is to be generated from bytecode * source. This is only needed the traces. */ int length, /* Number of bytes in command; if -1, all * characters up to the first null byte are * used. */ int flags) /* Collection of OR-ed bits that control the * evaluation of the script. Only * TCL_EVAL_GLOBAL and TCL_EVAL_INVOKE are * currently supported. */ { Command *cmdPtr; Interp *iPtr = (Interp *) interp; Tcl_Obj **newObjv; int i; CallFrame *savedVarFramePtr = NULL; CallFrame *varFramePtr = iPtr->varFramePtr; int code = TCL_OK; int traceCode = TCL_OK; int checkTraces = 1, traced; Namespace *savedNsPtr = NULL; Namespace *lookupNsPtr = iPtr->lookupNsPtr; Tcl_Obj *commandPtr = NULL; if (TclInterpReady(interp) == TCL_ERROR) { return TCL_ERROR; } if (objc == 0) { return TCL_OK; } /* * If any execution traces rename or delete the current command, we may * need (at most) two passes here. */ reparseBecauseOfTraces: /* * Configure evaluation context to match the requested flags. */ if (flags) { if (flags & TCL_EVAL_INVOKE) { savedNsPtr = varFramePtr->nsPtr; if (lookupNsPtr) { varFramePtr->nsPtr = lookupNsPtr; iPtr->lookupNsPtr = NULL; } else { varFramePtr->nsPtr = iPtr->globalNsPtr; } } else if ((flags & TCL_EVAL_GLOBAL) && (varFramePtr != iPtr->rootFramePtr) && !savedVarFramePtr) { varFramePtr = iPtr->rootFramePtr; savedVarFramePtr = iPtr->varFramePtr; iPtr->varFramePtr = varFramePtr; } } /* * Find the function to execute this command. If there isn't one, then see * if there is an unknown command handler registered for this namespace. * If so, create a new word array with the handler as the first words and * the original command words as arguments. Then call ourselves * recursively to execute it. */ cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, objv[0]); if (!cmdPtr) { goto notFound; } if (savedNsPtr) { varFramePtr->nsPtr = savedNsPtr; } else if (iPtr->ensembleRewrite.sourceObjs) { /* * TCL_EVAL_INVOKE was not set: clear rewrite rules */ iPtr->ensembleRewrite.sourceObjs = NULL; } /* * Call trace functions if needed. */ traced = (iPtr->tracePtr || (cmdPtr->flags & CMD_HAS_EXEC_TRACES)); if (traced && checkTraces) { int cmdEpoch = cmdPtr->cmdEpoch; int newEpoch; /* * Insure that we have a correct nul-terminated command string for the * trace code. */ commandPtr = GetCommandSource(iPtr, command, length, objc, objv); command = TclGetStringFromObj(commandPtr, &length); /* * Execute any command or execution traces. Note that we bump up the * command's reference count for the duration of the calling of the * traces so that the structure doesn't go away underneath our feet. */ cmdPtr->refCount++; if (iPtr->tracePtr && (traceCode == TCL_OK)) { traceCode = TclCheckInterpTraces(interp, command, length, cmdPtr, code, TCL_TRACE_ENTER_EXEC, objc, objv); } if ((cmdPtr->flags & CMD_HAS_EXEC_TRACES) && (traceCode == TCL_OK)) { traceCode = TclCheckExecutionTraces(interp, command, length, cmdPtr, code, TCL_TRACE_ENTER_EXEC, objc, objv); } newEpoch = cmdPtr->cmdEpoch; TclCleanupCommandMacro(cmdPtr); /* * If the traces modified/deleted the command or any existing traces, * they will update the command's epoch. When that happens, set * checkTraces is set to 0 to prevent the re-calling of traces (and * any possible infinite loop) and we go back to re-find the command * implementation. */ if (cmdEpoch != newEpoch) { checkTraces = 0; goto reparseBecauseOfTraces; } } if (TCL_DTRACE_CMD_ARGS_ENABLED()) { char *a[10]; int i = 0; while (i < 10) { a[i] = i < objc ? TclGetString(objv[i]) : NULL; i++; } TCL_DTRACE_CMD_ARGS(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9]); } if (TCL_DTRACE_CMD_INFO_ENABLED() && iPtr->cmdFramePtr) { Tcl_Obj *info = TclInfoFrame(interp, iPtr->cmdFramePtr); char *a[4]; int i[2]; TclDTraceInfo(info, a, i); TCL_DTRACE_CMD_INFO(a[0], a[1], a[2], a[3], i[0], i[1]); TclDecrRefCount(info); } /* * Finally, invoke the command's Tcl_ObjCmdProc. */ cmdPtr->refCount++; iPtr->cmdCount++; if (code == TCL_OK && traceCode == TCL_OK && !TclLimitExceeded(iPtr->limit)) { if (TCL_DTRACE_CMD_ENTRY_ENABLED()) { TCL_DTRACE_CMD_ENTRY(TclGetString(objv[0]), objc - 1, (Tcl_Obj **)(objv + 1)); } code = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, objc, objv); if (TCL_DTRACE_CMD_RETURN_ENABLED()) { TCL_DTRACE_CMD_RETURN(TclGetString(objv[0]), code); } } if (TclAsyncReady(iPtr)) { code = Tcl_AsyncInvoke(interp, code); } if (code == TCL_OK && TclLimitReady(iPtr->limit)) { code = Tcl_LimitCheck(interp); } /* * Call 'leave' command traces */ if (traced) { if (!(cmdPtr->flags & CMD_IS_DELETED)) { if ((cmdPtr->flags & CMD_HAS_EXEC_TRACES) && traceCode == TCL_OK){ traceCode = TclCheckExecutionTraces(interp, command, length, cmdPtr, code, TCL_TRACE_LEAVE_EXEC, objc, objv); } if (iPtr->tracePtr != NULL && traceCode == TCL_OK) { traceCode = TclCheckInterpTraces(interp, command, length, cmdPtr, code, TCL_TRACE_LEAVE_EXEC, objc, objv); } } /* * If one of the trace invocation resulted in error, then change the * result code accordingly. Note, that the interp->result should * already be set correctly by the call to TraceExecutionProc. */ if (traceCode != TCL_OK) { code = traceCode; } if (commandPtr) { Tcl_DecrRefCount(commandPtr); } } /* * Decrement the reference count of cmdPtr and deallocate it if it has * dropped to zero. */ TclCleanupCommandMacro(cmdPtr); /* * If the interpreter has a non-empty string result, the result object is * either empty or stale because some function 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); } if (TCL_DTRACE_CMD_RESULT_ENABLED()) { Tcl_Obj *r; r = Tcl_GetObjResult(interp); TCL_DTRACE_CMD_RESULT(TclGetString(objv[0]), code, TclGetString(r),r); } done: if (savedVarFramePtr) { iPtr->varFramePtr = savedVarFramePtr; } return code; notFound: { Namespace *currNsPtr = NULL; /* Used to check for and invoke any * registered unknown command handler * for the current namespace (TIP * 181). */ int newObjc, handlerObjc; Tcl_Obj **handlerObjv; currNsPtr = varFramePtr->nsPtr; if ((currNsPtr == NULL) || (currNsPtr->unknownHandlerPtr == NULL)) { currNsPtr = iPtr->globalNsPtr; if (currNsPtr == NULL) { Tcl_Panic("TclEvalObjvInternal: NULL global namespace pointer"); } } /* * Check to see if the resolution namespace has lost its unknown * handler. If so, reset it to "::unknown". */ if (currNsPtr->unknownHandlerPtr == NULL) { TclNewLiteralStringObj(currNsPtr->unknownHandlerPtr, "::unknown"); Tcl_IncrRefCount(currNsPtr->unknownHandlerPtr); } /* * Get the list of words for the unknown handler and allocate enough * space to hold both the handler prefix and all words of the command * invokation itself. */ Tcl_ListObjGetElements(NULL, currNsPtr->unknownHandlerPtr, &handlerObjc, &handlerObjv); newObjc = objc + handlerObjc; newObjv = (Tcl_Obj **) TclStackAlloc(interp, (int) sizeof(Tcl_Obj *) * newObjc); /* * Copy command prefix from unknown handler and add on the real * command's full argument list. Note that we only use memcpy() once * because we have to increment the reference count of all the handler * arguments anyway. */ for (i = 0; i < handlerObjc; ++i) { newObjv[i] = handlerObjv[i]; Tcl_IncrRefCount(newObjv[i]); } memcpy(newObjv+handlerObjc, objv, sizeof(Tcl_Obj *) * (unsigned)objc); /* * Look up and invoke the handler (by recursive call to this * function). If there is no handler at all, instead of doing the * recursive call we just generate a generic error message; it would * be an infinite-recursion nightmare otherwise. */ cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, newObjv[0]); if (cmdPtr == NULL) { Tcl_AppendResult(interp, "invalid command name \"", TclGetString(objv[0]), "\"", NULL); code = TCL_ERROR; } else { iPtr->numLevels++; code = TclEvalObjvInternal(interp, newObjc, newObjv, command, length, 0); iPtr->numLevels--; } /* * Release any resources we locked and allocated during the handler * call. */ for (i = 0; i < handlerObjc; ++i) { Tcl_DecrRefCount(newObjv[i]); } TclStackFree(interp, newObjv); if (savedNsPtr) { varFramePtr->nsPtr = savedNsPtr; } goto done; } }  /* *---------------------------------------------------------------------- * * Tcl_EvalObjv -- * * This function evaluates a Tcl command that has already been parsed * into words, with one Tcl_Obj holding each word. * * Results: * The return value is a standard Tcl completion code such as TCL_OK or * TCL_ERROR. A result or error message is left in interp's result. * * Side effects: * Depends on the command. * *---------------------------------------------------------------------- */ int Tcl_EvalObjv( Tcl_Interp *interp, /* Interpreter in which to evaluate the * command. Also used for error reporting. */ int objc, /* Number of words in command. */ Tcl_Obj *const objv[], /* An array of pointers to objects that are * the words that make up the command. */ int flags) /* Collection of OR-ed bits that control the * evaluation of the script. Only * TCL_EVAL_GLOBAL and TCL_EVAL_INVOKE are * currently supported. */ { Interp *iPtr = (Interp *) interp; int code = TCL_OK; iPtr->numLevels++; code = TclEvalObjvInternal(interp, objc, objv, NULL, 0, flags); iPtr->numLevels--; if (code == TCL_OK) { return code; } else { int allowExceptions = (iPtr->evalFlags & TCL_ALLOW_EXCEPTIONS); /* * If we are again at the top level, process any unusual return code * returned by the evaluated code. */ if (iPtr->numLevels == 0) { if (code == TCL_RETURN) { code = TclUpdateReturnInfo(iPtr); } if ((code != TCL_ERROR) && !allowExceptions) { ProcessUnexpectedResult(interp, code); code = TCL_ERROR; } } if ((code == TCL_ERROR) && !(flags & TCL_EVAL_INVOKE)) { /* * If there was an error, a command string will be needed for the * error log: generate it now. Do not worry too much about doing * it expensively. */ Tcl_Obj *listPtr; char *cmdString; int cmdLen; listPtr = Tcl_NewListObj(objc, objv); cmdString = Tcl_GetStringFromObj(listPtr, &cmdLen); Tcl_LogCommandInfo(interp, cmdString, cmdString, cmdLen); Tcl_DecrRefCount(listPtr); } return code; } }  /* *---------------------------------------------------------------------- * * Tcl_EvalTokensStandard -- * * Given an array of tokens parsed from a Tcl command (e.g., the tokens * that make up a word or the index for an array variable) this function * evaluates the tokens and concatenates their values to form a single * result value. * * Results: * The return value is a standard Tcl completion code such as TCL_OK or * TCL_ERROR. A result or error message is left in interp's result. * * Side effects: * Depends on the array of tokens being evaled. * *---------------------------------------------------------------------- */ int Tcl_EvalTokensStandard( Tcl_Interp *interp, /* Interpreter in which to lookup variables, * execute nested commands, and report * errors. */ Tcl_Token *tokenPtr, /* Pointer to first in an array of tokens to * evaluate and concatenate. */ int count) /* Number of tokens to consider at tokenPtr. * Must be at least 1. */ { return TclSubstTokens(interp, tokenPtr, count, /* numLeftPtr */ NULL, 1); }  /* *---------------------------------------------------------------------- * * Tcl_EvalTokens -- * * Given an array of tokens parsed from a Tcl command (e.g., the tokens * that make up a word or the index for an array variable) this function * evaluates the tokens and concatenates their values to form a single * result value. * * Results: * The return value is a pointer to a newly allocated Tcl_Obj containing * the value of the array of tokens. The reference count of the returned * object has been incremented. If an error occurs in evaluating the * tokens then a NULL value is returned and an error message is left in * interp's result. * * Side effects: * A new object is allocated to hold the result. * *---------------------------------------------------------------------- * * This uses a non-standard return convention; its use is now deprecated. It * is a wrapper for the new function Tcl_EvalTokensStandard, and is not used * in the core any longer. It is only kept for backward compatibility. */ Tcl_Obj * Tcl_EvalTokens( Tcl_Interp *interp, /* Interpreter in which to lookup variables, * execute nested commands, and report * errors. */ Tcl_Token *tokenPtr, /* Pointer to first in an array of tokens to * evaluate and concatenate. */ int count) /* Number of tokens to consider at tokenPtr. * Must be at least 1. */ { Tcl_Obj *resPtr; if (Tcl_EvalTokensStandard(interp, tokenPtr, count) != TCL_OK) { return NULL; } resPtr = Tcl_GetObjResult(interp); Tcl_IncrRefCount(resPtr); Tcl_ResetResult(interp); return resPtr; }  /* *---------------------------------------------------------------------- * * Tcl_EvalEx, TclEvalEx -- * * This function evaluates a Tcl script without using the compiler or * byte-code interpreter. It just parses the script, creates values for * each word of each command, then calls EvalObjv to execute each * command. * * Results: * The return value is a standard Tcl completion code such as TCL_OK or * TCL_ERROR. A result or error message is left in interp's result. * * Side effects: * Depends on the script. * * TIP #280 : Keep public API, internally extended API. *---------------------------------------------------------------------- */ int Tcl_EvalEx( Tcl_Interp *interp, /* Interpreter in which to evaluate the * script. Also used for error reporting. */ const char *script, /* First character of script to evaluate. */ int numBytes, /* Number of bytes in script. If < 0, the * script consists of all bytes up to the * first null character. */ int flags) /* Collection of OR-ed bits that control the * evaluation of the script. Only * TCL_EVAL_GLOBAL is currently supported. */ { return TclEvalEx(interp, script, numBytes, flags, 1); } int TclEvalEx( Tcl_Interp *interp, /* Interpreter in which to evaluate the * script. Also used for error reporting. */ const char *script, /* First character of script to evaluate. */ int numBytes, /* Number of bytes in script. If < 0, the * script consists of all bytes up to the * first NUL character. */ int flags, /* Collection of OR-ed bits that control the * evaluation of the script. Only * TCL_EVAL_GLOBAL is currently supported. */ int line) /* The line the script starts on. */ { Interp *iPtr = (Interp *) interp; const char *p, *next; const unsigned int minObjs = 20; Tcl_Obj **objv, **objvSpace; int *expand, *lines, *lineSpace; Tcl_Token *tokenPtr; int commandLength, bytesLeft, expandRequested, code = TCL_OK; CallFrame *savedVarFramePtr;/* Saves old copy of iPtr->varFramePtr in case * TCL_EVAL_GLOBAL was set. */ int allowExceptions = (iPtr->evalFlags & TCL_ALLOW_EXCEPTIONS); int gotParse = 0; unsigned int i, objectsUsed = 0; /* These variables keep track of how much * state has been allocated while evaluating * the script, so that it can be freed * properly if an error occurs. */ Tcl_Parse *parsePtr = (Tcl_Parse *) TclStackAlloc(interp, sizeof(Tcl_Parse)); CmdFrame *eeFramePtr = (CmdFrame *) TclStackAlloc(interp, sizeof(CmdFrame)); Tcl_Obj **stackObjArray = (Tcl_Obj **) TclStackAlloc(interp, minObjs * sizeof(Tcl_Obj *)); int *expandStack = (int *) TclStackAlloc(interp, minObjs * sizeof(int)); int *linesStack = (int *) TclStackAlloc(interp, minObjs * sizeof(int)); /* TIP #280 Structures for tracking of command * locations. */ if (numBytes < 0) { numBytes = strlen(script); } Tcl_ResetResult(interp); savedVarFramePtr = iPtr->varFramePtr; if (flags & TCL_EVAL_GLOBAL) { iPtr->varFramePtr = iPtr->rootFramePtr; } /* * Each iteration through the following loop parses the next command from * the script and then executes it. */ objv = objvSpace = stackObjArray; lines = lineSpace = linesStack; expand = expandStack; p = script; bytesLeft = numBytes; /* * TIP #280 Initialize tracking. Do not push on the frame stack yet. * * We may cont. counting based on a specific context (CTX), or open a new * context, either for a sourced script, or 'eval'. For sourced files we * always have a path object, even if nothing was specified in the interp * itself. That makes code using it simpler as NULL checks can be left * out. Sourced file without path in the 'scriptFile' is possible during * Tcl initialization. */ if (iPtr->evalFlags & TCL_EVAL_CTX) { /* * Path information comes out of the context. */ eeFramePtr->type = TCL_LOCATION_SOURCE; eeFramePtr->data.eval.path = iPtr->invokeCmdFramePtr->data.eval.path; Tcl_IncrRefCount(eeFramePtr->data.eval.path); } else if (iPtr->evalFlags & TCL_EVAL_FILE) { /* * Set up for a sourced file. */ eeFramePtr->type = TCL_LOCATION_SOURCE; if (iPtr->scriptFile) { /* * Normalization here, to have the correct pwd. Should have * negligible impact on performance, as the norm should have been * done already by the 'source' invoking us, and it caches the * result. */ Tcl_Obj *norm = Tcl_FSGetNormalizedPath(interp, iPtr->scriptFile); if (norm == NULL) { /* * Error message in the interp result. */ code = TCL_ERROR; goto error; } eeFramePtr->data.eval.path = norm; Tcl_IncrRefCount(eeFramePtr->data.eval.path); } else { TclNewLiteralStringObj(eeFramePtr->data.eval.path, ""); } } else { /* * Set up for plain eval. */ eeFramePtr->type = TCL_LOCATION_EVAL; eeFramePtr->data.eval.path = NULL; } eeFramePtr->level = iPtr->cmdFramePtr ? iPtr->cmdFramePtr->level + 1 : 1; eeFramePtr->framePtr = iPtr->framePtr; eeFramePtr->nextPtr = iPtr->cmdFramePtr; eeFramePtr->nline = 0; eeFramePtr->line = NULL; iPtr->evalFlags = 0; do { if (Tcl_ParseCommand(interp, p, bytesLeft, 0, parsePtr) != TCL_OK) { code = TCL_ERROR; goto error; } /* * TIP #280 Track lines. The parser may have skipped text till it * found the command we are now at. We have to count the lines in this * block. */ TclAdvanceLines(&line, p, parsePtr->commandStart); gotParse = 1; if (parsePtr->numWords > 0) { /* * TIP #280. Track lines within the words of the current command. */ int wordLine = line; const char *wordStart = parsePtr->commandStart; /* * Generate an array of objects for the words of the command. */ unsigned int objectsNeeded = 0; unsigned int numWords = parsePtr->numWords; if (numWords > minObjs) { expand = (int *) ckalloc(numWords * sizeof(int)); objvSpace = (Tcl_Obj **) ckalloc(numWords * sizeof(Tcl_Obj *)); lineSpace = (int *) ckalloc(numWords * sizeof(int)); } expandRequested = 0; objv = objvSpace; lines = lineSpace; for (objectsUsed = 0, tokenPtr = parsePtr->tokenPtr; objectsUsed < numWords; objectsUsed++, tokenPtr += tokenPtr->numComponents+1) { /* * TIP #280. Track lines to current word. Save the information * on a per-word basis, signaling dynamic words as needed. * Make the information available to the recursively called * evaluator as well, including the type of context (source * vs. eval). */ TclAdvanceLines(&wordLine, wordStart, tokenPtr->start); wordStart = tokenPtr->start; lines[objectsUsed] = TclWordKnownAtCompileTime(tokenPtr, NULL) ? wordLine : -1; if (eeFramePtr->type == TCL_LOCATION_SOURCE) { iPtr->evalFlags |= TCL_EVAL_FILE; } code = TclSubstTokens(interp, tokenPtr+1, tokenPtr->numComponents, NULL, wordLine); iPtr->evalFlags = 0; if (code != TCL_OK) { goto error; } objv[objectsUsed] = Tcl_GetObjResult(interp); Tcl_IncrRefCount(objv[objectsUsed]); if (tokenPtr->type == TCL_TOKEN_EXPAND_WORD) { int numElements; code = TclListObjLength(interp, objv[objectsUsed], &numElements); if (code == TCL_ERROR) { /* * Attempt to expand a non-list. */ Tcl_AppendObjToErrorInfo(interp, Tcl_ObjPrintf( "\n (expanding word %d)", objectsUsed)); Tcl_DecrRefCount(objv[objectsUsed]); goto error; } expandRequested = 1; expand[objectsUsed] = 1; objectsNeeded += (numElements ? numElements : 1); } else { expand[objectsUsed] = 0; objectsNeeded++; } } /* for loop */ if (expandRequested) { /* * Some word expansion was requested. Check for objv resize. */ Tcl_Obj **copy = objvSpace; int *lcopy = lineSpace; int wordIdx = numWords; int objIdx = objectsNeeded - 1; if ((numWords > minObjs) || (objectsNeeded > minObjs)) { objv = objvSpace = (Tcl_Obj **) ckalloc(objectsNeeded * sizeof(Tcl_Obj *)); lines = lineSpace = (int *) ckalloc(objectsNeeded * sizeof(int)); } objectsUsed = 0; while (wordIdx--) { if (expand[wordIdx]) { int numElements; Tcl_Obj **elements, *temp = copy[wordIdx]; Tcl_ListObjGetElements(NULL, temp, &numElements, &elements); objectsUsed += numElements; while (numElements--) { lines[objIdx] = -1; objv[objIdx--] = elements[numElements]; Tcl_IncrRefCount(elements[numElements]); } Tcl_DecrRefCount(temp); } else { lines[objIdx] = lcopy[wordIdx]; objv[objIdx--] = copy[wordIdx]; objectsUsed++; } } objv += objIdx+1; if (copy != stackObjArray) { ckfree((char *) copy); } if (lcopy != linesStack) { ckfree((char *) lcopy); } } /* * Execute the command and free the objects for its words. * * TIP #280: Remember the command itself for 'info frame'. We * shorten the visible command by one char to exclude the * termination character, if necessary. Here is where we put our * frame on the stack of frames too. _After_ the nested commands * have been executed. */ eeFramePtr->cmd.str.cmd = parsePtr->commandStart; eeFramePtr->cmd.str.len = parsePtr->commandSize; if (parsePtr->term == parsePtr->commandStart + parsePtr->commandSize - 1) { eeFramePtr->cmd.str.len--; } eeFramePtr->nline = objectsUsed; eeFramePtr->line = lines; iPtr->cmdFramePtr = eeFramePtr; iPtr->numLevels++; code = TclEvalObjvInternal(interp, objectsUsed, objv, parsePtr->commandStart, parsePtr->commandSize, 0); iPtr->numLevels--; iPtr->cmdFramePtr = iPtr->cmdFramePtr->nextPtr; eeFramePtr->line = NULL; eeFramePtr->nline = 0; if (code != TCL_OK) { goto error; } for (i = 0; i < objectsUsed; i++) { Tcl_DecrRefCount(objv[i]); } objectsUsed = 0; if (objvSpace != stackObjArray) { ckfree((char *) objvSpace); objvSpace = stackObjArray; ckfree((char *) lineSpace); lineSpace = linesStack; } /* * Free expand separately since objvSpace could have been * reallocated above. */ if (expand != expandStack) { ckfree((char *) expand); expand = expandStack; } } /* * Advance to the next command in the script. * * TIP #280 Track Lines. Now we track how many lines were in the * executed command. */ next = parsePtr->commandStart + parsePtr->commandSize; bytesLeft -= next - p; p = next; TclAdvanceLines(&line, parsePtr->commandStart, p); Tcl_FreeParse(parsePtr); gotParse = 0; } while (bytesLeft > 0); iPtr->varFramePtr = savedVarFramePtr; code = TCL_OK; goto cleanup_return; error: /* * Generate and log various pieces of error information. */ if (iPtr->numLevels == 0) { if (code == TCL_RETURN) { code = TclUpdateReturnInfo(iPtr); } if ((code != TCL_OK) && (code != TCL_ERROR) && !allowExceptions) { ProcessUnexpectedResult(interp, code); code = TCL_ERROR; } } if ((code == TCL_ERROR) && !(iPtr->flags & ERR_ALREADY_LOGGED)) { commandLength = parsePtr->commandSize; if (parsePtr->term == parsePtr->commandStart + commandLength - 1) { /* * The terminator character (such as ; or ]) of the command where * the error occurred is the last character in the parsed command. * Reduce the length by one so that the error message doesn't * include the terminator character. */ commandLength -= 1; } Tcl_LogCommandInfo(interp, script, parsePtr->commandStart, commandLength); } iPtr->flags &= ~ERR_ALREADY_LOGGED; /* * Then free resources that had been allocated to the command. */ for (i = 0; i < objectsUsed; i++) { Tcl_DecrRefCount(objv[i]); } if (gotParse) { Tcl_FreeParse(parsePtr); } if (objvSpace != stackObjArray) { ckfree((char *) objvSpace); ckfree((char *) lineSpace); } if (expand != expandStack) { ckfree((char *) expand); } iPtr->varFramePtr = savedVarFramePtr; cleanup_return: /* * TIP #280. Release the local CmdFrame, and its contents. */ if (eeFramePtr->type == TCL_LOCATION_SOURCE) { Tcl_DecrRefCount(eeFramePtr->data.eval.path); } TclStackFree(interp, linesStack); TclStackFree(interp, expandStack); TclStackFree(interp, stackObjArray); TclStackFree(interp, eeFramePtr); TclStackFree(interp, parsePtr); return code; }  /* *---------------------------------------------------------------------- * * TclAdvanceLines -- * * This function is a helper which counts the number of lines in a block * of text and advances an external counter. * * Results: * None. * * Side effects: * The specified counter is advanced per the number of lines found. * * TIP #280 *---------------------------------------------------------------------- */ void TclAdvanceLines( int *line, const char *start, const char *end) { register const char *p; for (p = start; p < end; p++) { if (*p == '\n') { (*line)++; } } }  /* *---------------------------------------------------------------------- * * Tcl_Eval -- * * Execute a Tcl command in a string. This function executes the script * directly, rather than compiling it to bytecodes. Before the arrival of * the bytecode compiler in Tcl 8.0 Tcl_Eval was the main function used * for executing Tcl commands, but nowadays it isn't used much. * * Results: * The return value is one of the return codes defined in tcl.h (such as * TCL_OK), and interp's result contains a value to supplement the return * code. The value of the result will persist only until the next call to * Tcl_Eval or Tcl_EvalObj: you must copy it or lose it! * * Side effects: * Can be almost arbitrary, depending on the commands in the script. * *---------------------------------------------------------------------- */ int Tcl_Eval( Tcl_Interp *interp, /* Token for command interpreter (returned by * previous call to Tcl_CreateInterp). */ const char *script) /* Pointer to TCL command to execute. */ { int code = Tcl_EvalEx(interp, script, -1, 0); /* * For backwards compatibility with old C code that predates the object * system in Tcl 8.0, we have to mirror the object result back into the * string result (some callers may expect it there). */ (void) Tcl_GetStringResult(interp); return code; }  /* *---------------------------------------------------------------------- * * Tcl_EvalObj, Tcl_GlobalEvalObj -- * * These functions are deprecated but we keep them around for backwards * compatibility reasons. * * Results: * See the functions they call. * * Side effects: * See the functions they call. * *---------------------------------------------------------------------- */ #undef Tcl_EvalObj int Tcl_EvalObj( Tcl_Interp *interp, Tcl_Obj *objPtr) { return Tcl_EvalObjEx(interp, objPtr, 0); } #undef Tcl_GlobalEvalObj int Tcl_GlobalEvalObj( Tcl_Interp *interp, Tcl_Obj *objPtr) { return Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_GLOBAL); }  /* *---------------------------------------------------------------------- * * Tcl_EvalObjEx, TclEvalObjEx -- * * Execute Tcl commands stored in a Tcl object. These commands are * compiled into bytecodes if necessary, unless TCL_EVAL_DIRECT is * specified. * * Results: * The return value is one of the return codes defined in tcl.h (such as * TCL_OK), and the interpreter's result contains a value to supplement * the return code. * * Side effects: * The object is converted, if necessary, to a ByteCode object that holds * the bytecode instructions for the commands. Executing the commands * will almost certainly have side effects that depend on those commands. * * TIP #280 : Keep public API, internally extended API. *---------------------------------------------------------------------- */ int Tcl_EvalObjEx( Tcl_Interp *interp, /* Token for command interpreter (returned by * a previous call to Tcl_CreateInterp). */ register Tcl_Obj *objPtr, /* Pointer to object containing commands to * execute. */ int flags) /* Collection of OR-ed bits that control the * evaluation of the script. Supported values * are TCL_EVAL_GLOBAL and TCL_EVAL_DIRECT. */ { return TclEvalObjEx(interp, objPtr, flags, NULL, 0); } int TclEvalObjEx( Tcl_Interp *interp, /* Token for command interpreter (returned by * a previous call to Tcl_CreateInterp). */ register Tcl_Obj *objPtr, /* Pointer to object containing commands to * execute. */ int flags, /* Collection of OR-ed bits that control the * evaluation of the script. Supported values * are TCL_EVAL_GLOBAL and TCL_EVAL_DIRECT. */ const CmdFrame *invoker, /* Frame of the command doing the eval. */ int word) /* Index of the word which is in objPtr. */ { register Interp *iPtr = (Interp *) interp; char *script; int numSrcBytes; int result; CallFrame *savedVarFramePtr;/* Saves old copy of iPtr->varFramePtr in case * TCL_EVAL_GLOBAL was set. */ int allowExceptions = (iPtr->evalFlags & TCL_ALLOW_EXCEPTIONS); Tcl_IncrRefCount(objPtr); if (flags & TCL_EVAL_DIRECT) { /* * We're not supposed to use the compiler or byte-code interpreter. * Let Tcl_EvalEx evaluate the command directly (and probably more * slowly). * * Pure List Optimization (no string representation). In this case, we * can safely use Tcl_EvalObjv instead and get an appreciable * improvement in execution speed. This is because it allows us to * avoid a setFromAny step that would just pack everything into a * string and back out again. * * This restriction has been relaxed a bit by storing in lists whether * they are "canonical" or not (a canonical list being one that is * either pure or that has its string rep derived by * UpdateStringOfList from the internal rep). */ if (objPtr->typePtr == &tclListType) { /* is a list... */ List *listRepPtr = objPtr->internalRep.twoPtrValue.ptr1; if (objPtr->bytes == NULL || /* ...without a string rep */ listRepPtr->canonicalFlag) {/* ...or that is canonical */ /* * TIP #280 Structures for tracking lines. As we know that * this is dynamic execution we ignore the invoker, even if * known. */ int line, i; char *w; Tcl_Obj **elements, *copyPtr = TclListObjCopy(NULL, objPtr); CmdFrame *eoFramePtr = (CmdFrame *) TclStackAlloc(interp, sizeof(CmdFrame)); eoFramePtr->type = TCL_LOCATION_EVAL_LIST; eoFramePtr->level = (iPtr->cmdFramePtr == NULL? 1 : iPtr->cmdFramePtr->level + 1); eoFramePtr->framePtr = iPtr->framePtr; eoFramePtr->nextPtr = iPtr->cmdFramePtr; Tcl_ListObjGetElements(NULL, copyPtr, &(eoFramePtr->nline), &elements); eoFramePtr->line = (int *) ckalloc(eoFramePtr->nline * sizeof(int)); eoFramePtr->cmd.listPtr = objPtr; Tcl_IncrRefCount(eoFramePtr->cmd.listPtr); eoFramePtr->data.eval.path = NULL; /* * TIP #280 Computes all the line numbers for the words in the * command. */ line = 1; for (i=0; i < eoFramePtr->nline; i++) { eoFramePtr->line[i] = line; w = TclGetString(elements[i]); TclAdvanceLines(&line, w, w + strlen(w)); } iPtr->cmdFramePtr = eoFramePtr; result = Tcl_EvalObjv(interp, eoFramePtr->nline, elements, flags); Tcl_DecrRefCount(copyPtr); iPtr->cmdFramePtr = iPtr->cmdFramePtr->nextPtr; Tcl_DecrRefCount(eoFramePtr->cmd.listPtr); ckfree((char *) eoFramePtr->line); eoFramePtr->line = NULL; eoFramePtr->nline = 0; TclStackFree(interp, eoFramePtr); goto done; } } /* * TIP #280. Propagate context as much as we can. Especially if the * script to evaluate is a single literal it makes sense to look if * our context is one with absolute line numbers we can then track * into the literal itself too. * * See also tclCompile.c, TclInitCompileEnv, for the equivalent code * in the bytecode compiler. */ if (invoker == NULL) { /* * No context, force opening of our own. */ script = Tcl_GetStringFromObj(objPtr, &numSrcBytes); result = Tcl_EvalEx(interp, script, numSrcBytes, flags); } else { /* * We have an invoker, describing the command asking for the * evaluation of a subordinate script. This script may originate * in a literal word, or from a variable, etc. Using the line * array we now check if we have good line information for the * relevant word. The type of context is relevant as well. In a * non-'source' context we don't have to try tracking lines. * * First see if the word exists and is a literal. If not we go * through the easy dynamic branch. No need to perform more * complex invokations. */ if ((invoker->nline <= word) || (invoker->line[word] < 0)) { /* * Dynamic script, or dynamic context, force our own * context. */ script = Tcl_GetStringFromObj(objPtr, &numSrcBytes); result = Tcl_EvalEx(interp, script, numSrcBytes, flags); } else { /* * Try to get an absolute context for the evaluation. */ int pc = 0; CmdFrame *ctxPtr = (CmdFrame *) TclStackAlloc(interp, sizeof(CmdFrame)); *ctxPtr = *invoker; if (invoker->type == TCL_LOCATION_BC) { /* * Note: Type BC => ctxPtr->data.eval.path is not used. * ctxPtr->data.tebc.codePtr is used instead. */ TclGetSrcInfoForPc(ctxPtr); pc = 1; } if (ctxPtr->type == TCL_LOCATION_SOURCE) { /* * Absolute context to reuse. */ iPtr->invokeCmdFramePtr = ctxPtr; iPtr->evalFlags |= TCL_EVAL_CTX; script = Tcl_GetStringFromObj(objPtr, &numSrcBytes); result = TclEvalEx(interp, script, numSrcBytes, flags, ctxPtr->line[word]); if (pc) { /* * Death of SrcInfo reference. */ Tcl_DecrRefCount(ctxPtr->data.eval.path); } } else { /* * Dynamic context or script, easier to make our own as * well. */ script = Tcl_GetStringFromObj(objPtr, &numSrcBytes); result = Tcl_EvalEx(interp, script, numSrcBytes, flags); } TclStackFree(interp, ctxPtr); } } } else { /* * Let the compiler/engine subsystem do the evaluation. * * TIP #280 The invoker provides us with the context for the script. * We transfer this to the byte code compiler. */ savedVarFramePtr = iPtr->varFramePtr; if (flags & TCL_EVAL_GLOBAL) { iPtr->varFramePtr = iPtr->rootFramePtr; } result = TclCompEvalObj(interp, objPtr, invoker, word); /* * If we are again at the top level, process any unusual return code * returned by the evaluated code. */ if (iPtr->numLevels == 0) { if (result == TCL_RETURN) { result = TclUpdateReturnInfo(iPtr); } if ((result != TCL_OK) && (result != TCL_ERROR) && !allowExceptions) { ProcessUnexpectedResult(interp, result); result = TCL_ERROR; script = Tcl_GetStringFromObj(objPtr, &numSrcBytes); Tcl_LogCommandInfo(interp, script, script, numSrcBytes); } } iPtr->evalFlags = 0; iPtr->varFramePtr = savedVarFramePtr; } done: TclDecrRefCount(objPtr); return result; }  /* *---------------------------------------------------------------------- * * ProcessUnexpectedResult -- * * Function called by Tcl_EvalObj to set the interpreter's result value * to an appropriate error message when the code it evaluates returns an * unexpected result code (not TCL_OK and not TCL_ERROR) to the topmost * evaluation level. * * Results: * None. * * Side effects: * The interpreter result is set to an error message appropriate to the * result code. * *---------------------------------------------------------------------- */ static void ProcessUnexpectedResult( Tcl_Interp *interp, /* The interpreter in which the unexpected * result code was returned. */ int returnCode) /* The unexpected result code. */ { Tcl_ResetResult(interp); if (returnCode == TCL_BREAK) { Tcl_AppendResult(interp, "invoked \"break\" outside of a loop", NULL); } else if (returnCode == TCL_CONTINUE) { Tcl_AppendResult(interp, "invoked \"continue\" outside of a loop", NULL); } else { Tcl_SetObjResult(interp, Tcl_ObjPrintf( "command returned bad code: %d", returnCode)); } }  /* *--------------------------------------------------------------------------- * * Tcl_ExprLong, Tcl_ExprDouble, Tcl_ExprBoolean -- * * Functions to evaluate an expression and return its value in a * particular form. * * Results: * Each of the functions below returns a standard Tcl result. If an error * occurs then an error message is left in the interp's result. Otherwise * the value of the expression, in the appropriate form, is stored at * *ptr. If the expression had a result that was incompatible with the * desired form then an error is returned. * * Side effects: * None. * *--------------------------------------------------------------------------- */ int Tcl_ExprLong( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ const char *exprstring, /* Expression to evaluate. */ long *ptr) /* Where to store result. */ { register Tcl_Obj *exprPtr; int result = TCL_OK; if (*exprstring == '\0') { /* * Legacy compatibility - return 0 for the zero-length string. */ *ptr = 0; } else { exprPtr = Tcl_NewStringObj(exprstring, -1); Tcl_IncrRefCount(exprPtr); result = Tcl_ExprLongObj(interp, exprPtr, ptr); Tcl_DecrRefCount(exprPtr); if (result != TCL_OK) { (void) Tcl_GetStringResult(interp); } } return result; } int Tcl_ExprDouble( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ const char *exprstring, /* Expression to evaluate. */ double *ptr) /* Where to store result. */ { register Tcl_Obj *exprPtr; int result = TCL_OK; if (*exprstring == '\0') { /* * Legacy compatibility - return 0 for the zero-length string. */ *ptr = 0.0; } else { exprPtr = Tcl_NewStringObj(exprstring, -1); Tcl_IncrRefCount(exprPtr); result = Tcl_ExprDoubleObj(interp, exprPtr, ptr); Tcl_DecrRefCount(exprPtr); /* Discard the expression object. */ if (result != TCL_OK) { (void) Tcl_GetStringResult(interp); } } return result; } int Tcl_ExprBoolean( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ const char *exprstring, /* Expression to evaluate. */ int *ptr) /* Where to store 0/1 result. */ { if (*exprstring == '\0') { /* * An empty string. Just set the result boolean to 0 (false). */ *ptr = 0; return TCL_OK; } else { int result; Tcl_Obj *exprPtr = Tcl_NewStringObj(exprstring, -1); Tcl_IncrRefCount(exprPtr); result = Tcl_ExprBooleanObj(interp, exprPtr, ptr); Tcl_DecrRefCount(exprPtr); if (result != TCL_OK) { /* * Move the interpreter's object result to the string result, then * reset the object result. */ (void) Tcl_GetStringResult(interp); } return result; } }  /* *-------------------------------------------------------------- * * Tcl_ExprLongObj, Tcl_ExprDoubleObj, Tcl_ExprBooleanObj -- * * Functions to evaluate an expression in an object and return its value * in a particular form. * * Results: * Each of the functions below returns a standard Tcl result object. If * an error occurs then an error message is left in the interpreter's * result. Otherwise the value of the expression, in the appropriate * form, is stored at *ptr. If the expression had a result that was * incompatible with the desired form then an error is returned. * * Side effects: * None. * *-------------------------------------------------------------- */ int Tcl_ExprLongObj( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ register Tcl_Obj *objPtr, /* Expression to evaluate. */ long *ptr) /* Where to store long result. */ { Tcl_Obj *resultPtr; int result, type; double d; ClientData internalPtr; result = Tcl_ExprObj(interp, objPtr, &resultPtr); if (result != TCL_OK) { return TCL_ERROR; } if (TclGetNumberFromObj(interp, resultPtr, &internalPtr, &type) != TCL_OK){ return TCL_ERROR; } switch (type) { case TCL_NUMBER_DOUBLE: { mp_int big; d = *((const double *) internalPtr); Tcl_DecrRefCount(resultPtr); if (Tcl_InitBignumFromDouble(interp, d, &big) != TCL_OK) { return TCL_ERROR; } resultPtr = Tcl_NewBignumObj(&big); /* FALLTHROUGH */ } case TCL_NUMBER_LONG: case TCL_NUMBER_WIDE: case TCL_NUMBER_BIG: result = TclGetLongFromObj(interp, resultPtr, ptr); break; case TCL_NUMBER_NAN: Tcl_GetDoubleFromObj(interp, resultPtr, &d); result = TCL_ERROR; } Tcl_DecrRefCount(resultPtr);/* Discard the result object. */ return result; } int Tcl_ExprDoubleObj( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ register Tcl_Obj *objPtr, /* Expression to evaluate. */ double *ptr) /* Where to store double result. */ { Tcl_Obj *resultPtr; int result, type; ClientData internalPtr; result = Tcl_ExprObj(interp, objPtr, &resultPtr); if (result != TCL_OK) { return TCL_ERROR; } result = TclGetNumberFromObj(interp, resultPtr, &internalPtr, &type); if (result == TCL_OK) { switch (type) { case TCL_NUMBER_NAN: #ifndef ACCEPT_NAN result = Tcl_GetDoubleFromObj(interp, resultPtr, ptr); break; #endif case TCL_NUMBER_DOUBLE: *ptr = *((const double *) internalPtr); result = TCL_OK; break; default: result = Tcl_GetDoubleFromObj(interp, resultPtr, ptr); } } Tcl_DecrRefCount(resultPtr);/* Discard the result object. */ return result; } int Tcl_ExprBooleanObj( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ register Tcl_Obj *objPtr, /* Expression to evaluate. */ int *ptr) /* Where to store 0/1 result. */ { Tcl_Obj *resultPtr; int result; result = Tcl_ExprObj(interp, objPtr, &resultPtr); if (result == TCL_OK) { result = Tcl_GetBooleanFromObj(interp, resultPtr, ptr); Tcl_DecrRefCount(resultPtr); /* Discard the result object. */ } return result; }  /* *---------------------------------------------------------------------- * * TclObjInvokeNamespace -- * * Object version: Invokes a Tcl command, given an objv/objc, from either * the exposed or hidden set of commands in the given interpreter. * NOTE: The command is invoked in the global stack frame of the * interpreter or namespace, thus it cannot see any current state on the * stack of that interpreter. * * Results: * A standard Tcl result. * * Side effects: * Whatever the command does. * *---------------------------------------------------------------------- */ int TclObjInvokeNamespace( Tcl_Interp *interp, /* Interpreter in which command is to be * invoked. */ int objc, /* Count of arguments. */ Tcl_Obj *const objv[], /* Argument objects; objv[0] points to the * name of the command to invoke. */ Tcl_Namespace *nsPtr, /* The namespace to use. */ int flags) /* Combination of flags controlling the call: * TCL_INVOKE_HIDDEN, TCL_INVOKE_NO_UNKNOWN, * or TCL_INVOKE_NO_TRACEBACK. */ { int result; Tcl_CallFrame *framePtr; /* * Make the specified namespace the current namespace and invoke the * command. */ result = TclPushStackFrame(interp, &framePtr, nsPtr, /*isProcFrame*/0); if (result != TCL_OK) { return TCL_ERROR; } result = TclObjInvoke(interp, objc, objv, flags); TclPopStackFrame(interp); return result; }  /* *---------------------------------------------------------------------- * * TclObjInvoke -- * * Invokes a Tcl command, given an objv/objc, from either the exposed or * the hidden sets of commands in the given interpreter. * * Results: * A standard Tcl object result. * * Side effects: * Whatever the command does. * *---------------------------------------------------------------------- */ int TclObjInvoke( Tcl_Interp *interp, /* Interpreter in which command is to be * invoked. */ int objc, /* Count of arguments. */ Tcl_Obj *const objv[], /* Argument objects; objv[0] points to the * name of the command to invoke. */ int flags) /* Combination of flags controlling the call: * TCL_INVOKE_HIDDEN, TCL_INVOKE_NO_UNKNOWN, * or TCL_INVOKE_NO_TRACEBACK. */ { register Interp *iPtr = (Interp *) interp; Tcl_HashTable *hTblPtr; /* Table of hidden commands. */ char *cmdName; /* Name of the command from objv[0]. */ Tcl_HashEntry *hPtr = NULL; Command *cmdPtr; int result; if (interp == NULL) { return TCL_ERROR; } if ((objc < 1) || (objv == NULL)) { Tcl_AppendResult(interp, "illegal argument vector", NULL); return TCL_ERROR; } if ((flags & TCL_INVOKE_HIDDEN) == 0) { Tcl_Panic("TclObjInvoke: called without TCL_INVOKE_HIDDEN"); } if (TclInterpReady(interp) == TCL_ERROR) { return TCL_ERROR; } cmdName = TclGetString(objv[0]); hTblPtr = iPtr->hiddenCmdTablePtr; if (hTblPtr != NULL) { hPtr = Tcl_FindHashEntry(hTblPtr, cmdName); } if (hPtr == NULL) { Tcl_AppendResult(interp, "invalid hidden command name \"", cmdName, "\"", NULL); return TCL_ERROR; } cmdPtr = Tcl_GetHashValue(hPtr); /* * Invoke the command function. */ iPtr->cmdCount++; result = cmdPtr->objProc(cmdPtr->objClientData, interp, objc, objv); /* * If an error occurred, record information about what was being executed * when the error occurred. */ if ((result == TCL_ERROR) && ((flags & TCL_INVOKE_NO_TRACEBACK) == 0) && ((iPtr->flags & ERR_ALREADY_LOGGED) == 0)) { int length; Tcl_Obj *command = Tcl_NewListObj(objc, objv); const char *cmdString; Tcl_IncrRefCount(command); cmdString = Tcl_GetStringFromObj(command, &length); Tcl_LogCommandInfo(interp, cmdString, cmdString, length); Tcl_DecrRefCount(command); iPtr->flags &= ~ERR_ALREADY_LOGGED; } return result; }  /* *--------------------------------------------------------------------------- * * Tcl_ExprString -- * * Evaluate an expression in a string and return its value in string * form. * * Results: * A standard Tcl result. If the result is TCL_OK, then the interp's * result is set to the string value of the expression. If the result is * TCL_ERROR, then the interp's result contains an error message. * * Side effects: * A Tcl object is allocated to hold a copy of the expression string. * This expression object is passed to Tcl_ExprObj and then deallocated. * *--------------------------------------------------------------------------- */ int Tcl_ExprString( Tcl_Interp *interp, /* Context in which to evaluate the * expression. */ const char *expr) /* Expression to evaluate. */ { int code = TCL_OK; if (expr[0] == '\0') { /* * An empty string. Just set the interpreter's result to 0. */ Tcl_SetResult(interp, "0", TCL_VOLATILE); } else { Tcl_Obj *resultPtr, *exprObj = Tcl_NewStringObj(expr, -1); Tcl_IncrRefCount(exprObj); code = Tcl_ExprObj(interp, exprObj, &resultPtr); Tcl_DecrRefCount(exprObj); if (code == TCL_OK) { Tcl_SetObjResult(interp, resultPtr); Tcl_DecrRefCount(resultPtr); } /* * Force the string rep of the interp result. */ (void) Tcl_GetStringResult(interp); } return code; }  /* *---------------------------------------------------------------------- * * Tcl_AppendObjToErrorInfo -- * * Add a Tcl_Obj value to the errorInfo field that describes the current * error. * * Results: * None. * * Side effects: * The value of the Tcl_obj is appended to the errorInfo field. If we are * just starting to log an error, errorInfo is initialized from the error * message in the interpreter's result. * *---------------------------------------------------------------------- */ void Tcl_AppendObjToErrorInfo( Tcl_Interp *interp, /* Interpreter to which error information * pertains. */ Tcl_Obj *objPtr) /* Message to record. */ { int length; const char *message = TclGetStringFromObj(objPtr, &length); Tcl_AddObjErrorInfo(interp, message, length); Tcl_DecrRefCount(objPtr); }  /* *---------------------------------------------------------------------- * * Tcl_AddErrorInfo -- * * Add information to the errorInfo field that describes the current * error. * * Results: * None. * * Side effects: * The contents of message are appended to the errorInfo field. If we are * just starting to log an error, errorInfo is initialized from the error * message in the interpreter's result. * *---------------------------------------------------------------------- */ void Tcl_AddErrorInfo( Tcl_Interp *interp, /* Interpreter to which error information * pertains. */ const char *message) /* Message to record. */ { Tcl_AddObjErrorInfo(interp, message, -1); }  /* *---------------------------------------------------------------------- * * Tcl_AddObjErrorInfo -- * * Add information to the errorInfo field that describes the current * error. This routine differs from Tcl_AddErrorInfo by taking a byte * pointer and length. * * Results: * None. * * Side effects: * "length" bytes from "message" are appended to the errorInfo field. If * "length" is negative, use bytes up to the first NULL byte. If we are * just starting to log an error, errorInfo is initialized from the error * message in the interpreter's result. * *---------------------------------------------------------------------- */ void Tcl_AddObjErrorInfo( Tcl_Interp *interp, /* Interpreter to which error information * pertains. */ const char *message, /* Points to the first byte of an array of * bytes of the message. */ int length) /* The number of bytes in the message. If < 0, * then append all bytes up to a NULL byte. */ { register Interp *iPtr = (Interp *) interp; /* * If we are just starting to log an error, errorInfo is initialized from * the error message in the interpreter's result. */ iPtr->flags |= ERR_LEGACY_COPY; if (iPtr->errorInfo == NULL) { if (iPtr->result[0] != 0) { /* * The interp's string result is set, apparently by some extension * making a deprecated direct write to it. That extension may * expect interp->result to continue to be set, so we'll take * special pains to avoid clearing it, until we drop support for * interp->result completely. */ iPtr->errorInfo = Tcl_NewStringObj(interp->result, -1); } else { iPtr->errorInfo = iPtr->objResultPtr; } Tcl_IncrRefCount(iPtr->errorInfo); if (!iPtr->errorCode) { Tcl_SetErrorCode(interp, "NONE", NULL); } } /* * Now append "message" to the end of errorInfo. */ if (length != 0) { if (Tcl_IsShared(iPtr->errorInfo)) { Tcl_DecrRefCount(iPtr->errorInfo); iPtr->errorInfo = Tcl_DuplicateObj(iPtr->errorInfo); Tcl_IncrRefCount(iPtr->errorInfo); } Tcl_AppendToObj(iPtr->errorInfo, message, length); } }  /* *--------------------------------------------------------------------------- * * Tcl_VarEvalVA -- * * Given a variable number of string arguments, concatenate them all * together and execute the result as a Tcl command. * * Results: * A standard Tcl return result. An error message or other result may be * left in the interp's result. * * Side effects: * Depends on what was done by the command. * *--------------------------------------------------------------------------- */ int Tcl_VarEvalVA( Tcl_Interp *interp, /* Interpreter in which to evaluate command. */ va_list argList) /* Variable argument list. */ { Tcl_DString buf; char *string; int result; /* * Copy the strings one after the other into a single larger string. Use * stack-allocated space for small commands, but if the command gets too * large than call ckalloc to create the space. */ Tcl_DStringInit(&buf); while (1) { string = va_arg(argList, char *); if (string == NULL) { break; } Tcl_DStringAppend(&buf, string, -1); } result = Tcl_Eval(interp, Tcl_DStringValue(&buf)); Tcl_DStringFree(&buf); return result; }  /* *---------------------------------------------------------------------- * * Tcl_VarEval -- * * Given a variable number of string arguments, concatenate them all * together and execute the result as a Tcl command. * * Results: * A standard Tcl return result. An error message or other result may be * left in interp->result. * * Side effects: * Depends on what was done by the command. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_VarEval( Tcl_Interp *interp, ...) { va_list argList; int result; va_start(argList, interp); result = Tcl_VarEvalVA(interp, argList); va_end(argList); return result; }  /* *---------------------------------------------------------------------- * * Tcl_GlobalEval -- * * Evaluate a command at global level in an interpreter. * * Results: * A standard Tcl result is returned, and the interp's result is modified * accordingly. * * Side effects: * The command string is executed in interp, and the execution is carried * out in the variable context of global level (no functions active), * just as if an "uplevel #0" command were being executed. * *---------------------------------------------------------------------- */ int Tcl_GlobalEval( Tcl_Interp *interp, /* Interpreter in which to evaluate command. */ const char *command) /* Command to evaluate. */ { register Interp *iPtr = (Interp *) interp; int result; CallFrame *savedVarFramePtr; savedVarFramePtr = iPtr->varFramePtr; iPtr->varFramePtr = iPtr->rootFramePtr; result = Tcl_Eval(interp, command); iPtr->varFramePtr = savedVarFramePtr; return result; }  /* *---------------------------------------------------------------------- * * Tcl_SetRecursionLimit -- * * Set the maximum number of recursive calls that may be active for an * interpreter at once. * * Results: * The return value is the old limit on nesting for interp. * * Side effects: * None. * *---------------------------------------------------------------------- */ int Tcl_SetRecursionLimit( Tcl_Interp *interp, /* Interpreter whose nesting limit is to be * set. */ int depth) /* New value for maximimum depth. */ { Interp *iPtr = (Interp *) interp; int old; old = iPtr->maxNestingDepth; if (depth > 0) { iPtr->maxNestingDepth = depth; } return old; }  /* *---------------------------------------------------------------------- * * Tcl_AllowExceptions -- * * Sets a flag in an interpreter so that exceptions can occur in the next * call to Tcl_Eval without them being turned into errors. * * Results: * None. * * Side effects: * The TCL_ALLOW_EXCEPTIONS flag gets set in the interpreter's evalFlags * structure. See the reference documentation for more details. * *---------------------------------------------------------------------- */ void Tcl_AllowExceptions( Tcl_Interp *interp) /* Interpreter in which to set flag. */ { Interp *iPtr = (Interp *) interp; iPtr->evalFlags |= TCL_ALLOW_EXCEPTIONS; }  /* *---------------------------------------------------------------------- * * Tcl_GetVersion -- * * Get the Tcl major, minor, and patchlevel version numbers and the * release type. A patch is a release type TCL_FINAL_RELEASE with a * patchLevel > 0. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ void Tcl_GetVersion( int *majorV, int *minorV, int *patchLevelV, int *type) { if (majorV != NULL) { *majorV = TCL_MAJOR_VERSION; } if (minorV != NULL) { *minorV = TCL_MINOR_VERSION; } if (patchLevelV != NULL) { *patchLevelV = TCL_RELEASE_SERIAL; } if (type != NULL) { *type = TCL_RELEASE_LEVEL; } }  /* *---------------------------------------------------------------------- * * Math Functions -- * * This page contains the functions that implement all of the built-in * math functions for expressions. * * Results: * Each function 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 ExprCeilFunc( ClientData clientData, /* Ignored */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter list. */ { int code; double d; mp_int big; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } code = Tcl_GetDoubleFromObj(interp, objv[1], &d); #ifdef ACCEPT_NAN if ((code != TCL_OK) && (objv[1]->typePtr == &tclDoubleType)) { Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } #endif if (code != TCL_OK) { return TCL_ERROR; } if (Tcl_GetBignumFromObj(NULL, objv[1], &big) == TCL_OK) { Tcl_SetObjResult(interp, Tcl_NewDoubleObj(TclCeil(&big))); mp_clear(&big); } else { Tcl_SetObjResult(interp, Tcl_NewDoubleObj(ceil(d))); } return TCL_OK; } static int ExprFloorFunc( ClientData clientData, /* Ignored */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter list. */ { int code; double d; mp_int big; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } code = Tcl_GetDoubleFromObj(interp, objv[1], &d); #ifdef ACCEPT_NAN if ((code != TCL_OK) && (objv[1]->typePtr == &tclDoubleType)) { Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } #endif if (code != TCL_OK) { return TCL_ERROR; } if (Tcl_GetBignumFromObj(NULL, objv[1], &big) == TCL_OK) { Tcl_SetObjResult(interp, Tcl_NewDoubleObj(TclFloor(&big))); mp_clear(&big); } else { Tcl_SetObjResult(interp, Tcl_NewDoubleObj(floor(d))); } return TCL_OK; } static int ExprIsqrtFunc( ClientData clientData, /* Ignored */ Tcl_Interp *interp, /* The interpreter in which to execute. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter list. */ { ClientData ptr; int type; double d; Tcl_WideInt w; mp_int big; int exact = 0; /* Flag == 1 if the argument can be * represented in a double as an exact * integer. */ /* * Check syntax. */ if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } /* * Make sure that the arg is a number. */ if (TclGetNumberFromObj(interp, objv[1], &ptr, &type) != TCL_OK) { return TCL_ERROR; } switch (type) { case TCL_NUMBER_NAN: Tcl_GetDoubleFromObj(interp, objv[1], &d); return TCL_ERROR; case TCL_NUMBER_DOUBLE: d = *((const double *) ptr); if (d < 0) { goto negarg; } #ifdef IEEE_FLOATING_POINT if (d <= MAX_EXACT) { exact = 1; } #endif if (!exact) { if (Tcl_InitBignumFromDouble(interp, d, &big) != TCL_OK) { return TCL_ERROR; } } break; case TCL_NUMBER_BIG: if (Tcl_GetBignumFromObj(interp, objv[1], &big) != TCL_OK) { return TCL_ERROR; } if (SIGN(&big) == MP_NEG) { mp_clear(&big); goto negarg; } break; default: if (Tcl_GetWideIntFromObj(interp, objv[1], &w) != TCL_OK) { return TCL_ERROR; } if (w < 0) { goto negarg; } d = (double) w; #ifdef IEEE_FLOATING_POINT if (d < MAX_EXACT) { exact = 1; } #endif if (!exact) { Tcl_GetBignumFromObj(interp, objv[1], &big); } break; } if (exact) { Tcl_SetObjResult(interp, Tcl_NewWideIntObj((Tcl_WideInt) sqrt(d))); } else { mp_int root; mp_init(&root); mp_sqrt(&big, &root); mp_clear(&big); Tcl_SetObjResult(interp, Tcl_NewBignumObj(&root)); } return TCL_OK; negarg: Tcl_SetObjResult(interp, Tcl_NewStringObj("square root of negative argument", -1)); return TCL_ERROR; } static int ExprSqrtFunc( ClientData clientData, /* Ignored */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter list. */ { int code; double d; mp_int big; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } code = Tcl_GetDoubleFromObj(interp, objv[1], &d); #ifdef ACCEPT_NAN if ((code != TCL_OK) && (objv[1]->typePtr == &tclDoubleType)) { Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } #endif if (code != TCL_OK) { return TCL_ERROR; } if ((d >= 0.0) && TclIsInfinite(d) && (Tcl_GetBignumFromObj(NULL, objv[1], &big) == TCL_OK)) { mp_int root; mp_init(&root); mp_sqrt(&big, &root); mp_clear(&big); Tcl_SetObjResult(interp, Tcl_NewDoubleObj(TclBignumToDouble(&root))); mp_clear(&root); } else { Tcl_SetObjResult(interp, Tcl_NewDoubleObj(sqrt(d))); } return TCL_OK; } static int ExprUnaryFunc( ClientData clientData, /* Contains the address of a function that * takes one double argument and returns a * double result. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count */ Tcl_Obj *const *objv) /* Actual parameter list */ { int code; double d; double (*func)(double) = (double (*)(double)) clientData; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } code = Tcl_GetDoubleFromObj(interp, objv[1], &d); #ifdef ACCEPT_NAN if ((code != TCL_OK) && (objv[1]->typePtr == &tclDoubleType)) { d = objv[1]->internalRep.doubleValue; Tcl_ResetResult(interp); code = TCL_OK; } #endif if (code != TCL_OK) { return TCL_ERROR; } errno = 0; return CheckDoubleResult(interp, (*func)(d)); } static int CheckDoubleResult( Tcl_Interp *interp, double dResult) { #ifndef ACCEPT_NAN if (TclIsNaN(dResult)) { TclExprFloatError(interp, dResult); return TCL_ERROR; } #endif if ((errno == ERANGE) && ((dResult == 0.0) || TclIsInfinite(dResult))) { /* * When ERANGE signals under/overflow, just accept 0.0 or +/-Inf */ } else if (errno != 0) { /* * Report other errno values as errors. */ TclExprFloatError(interp, dResult); return TCL_ERROR; } Tcl_SetObjResult(interp, Tcl_NewDoubleObj(dResult)); return TCL_OK; } static int ExprBinaryFunc( ClientData clientData, /* Contains the address of a function that * takes two double arguments and returns a * double result. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Parameter vector. */ { int code; double d1, d2; double (*func)(double, double) = (double (*)(double, double)) clientData; if (objc != 3) { MathFuncWrongNumArgs(interp, 3, objc, objv); return TCL_ERROR; } code = Tcl_GetDoubleFromObj(interp, objv[1], &d1); #ifdef ACCEPT_NAN if ((code != TCL_OK) && (objv[1]->typePtr == &tclDoubleType)) { d1 = objv[1]->internalRep.doubleValue; Tcl_ResetResult(interp); code = TCL_OK; } #endif if (code != TCL_OK) { return TCL_ERROR; } code = Tcl_GetDoubleFromObj(interp, objv[2], &d2); #ifdef ACCEPT_NAN if ((code != TCL_OK) && (objv[2]->typePtr == &tclDoubleType)) { d2 = objv[2]->internalRep.doubleValue; Tcl_ResetResult(interp); code = TCL_OK; } #endif if (code != TCL_OK) { return TCL_ERROR; } errno = 0; return CheckDoubleResult(interp, (*func)(d1, d2)); } static int ExprAbsFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Parameter vector. */ { ClientData ptr; int type; mp_int big; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } if (TclGetNumberFromObj(interp, objv[1], &ptr, &type) != TCL_OK) { return TCL_ERROR; } if (type == TCL_NUMBER_LONG) { long l = *((const long *) ptr); if (l < (long)0) { if (l == LONG_MIN) { TclBNInitBignumFromLong(&big, l); goto tooLarge; } Tcl_SetObjResult(interp, Tcl_NewLongObj(-l)); } else { Tcl_SetObjResult(interp, objv[1]); } return TCL_OK; } if (type == TCL_NUMBER_DOUBLE) { double d = *((const double *) ptr); if (d < 0.0) { Tcl_SetObjResult(interp, Tcl_NewDoubleObj(-d)); } else { Tcl_SetObjResult(interp, objv[1]); } return TCL_OK; } #ifndef NO_WIDE_TYPE if (type == TCL_NUMBER_WIDE) { Tcl_WideInt w = *((const Tcl_WideInt *) ptr); if (w < (Tcl_WideInt)0) { if (w == LLONG_MIN) { TclBNInitBignumFromWideInt(&big, w); goto tooLarge; } Tcl_SetObjResult(interp, Tcl_NewWideIntObj(-w)); } else { Tcl_SetObjResult(interp, objv[1]); } return TCL_OK; } #endif if (type == TCL_NUMBER_BIG) { /* TODO: const correctness ? */ if (mp_cmp_d((mp_int *) ptr, 0) == MP_LT) { Tcl_GetBignumFromObj(NULL, objv[1], &big); tooLarge: mp_neg(&big, &big); Tcl_SetObjResult(interp, Tcl_NewBignumObj(&big)); } else { Tcl_SetObjResult(interp, objv[1]); } return TCL_OK; } if (type == TCL_NUMBER_NAN) { #ifdef ACCEPT_NAN Tcl_SetObjResult(interp, objv[1]); return TCL_OK; #else double d; Tcl_GetDoubleFromObj(interp, objv[1], &d); return TCL_ERROR; #endif } return TCL_OK; } static int ExprBoolFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { int value; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } if (Tcl_GetBooleanFromObj(interp, objv[1], &value) != TCL_OK) { return TCL_ERROR; } Tcl_SetObjResult(interp, Tcl_NewBooleanObj(value)); return TCL_OK; } static int ExprDoubleFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { double dResult; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } if (Tcl_GetDoubleFromObj(interp, objv[1], &dResult) != TCL_OK) { #ifdef ACCEPT_NAN if (objv[1]->typePtr == &tclDoubleType) { Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } #endif return TCL_ERROR; } Tcl_SetObjResult(interp, Tcl_NewDoubleObj(dResult)); return TCL_OK; } static int ExprEntierFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { double d; int type; ClientData ptr; if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } if (TclGetNumberFromObj(interp, objv[1], &ptr, &type) != TCL_OK) { return TCL_ERROR; } if (type == TCL_NUMBER_DOUBLE) { d = *((const double *) ptr); if ((d >= (double)LONG_MAX) || (d <= (double)LONG_MIN)) { mp_int big; if (Tcl_InitBignumFromDouble(interp, d, &big) != TCL_OK) { /* Infinity */ return TCL_ERROR; } Tcl_SetObjResult(interp, Tcl_NewBignumObj(&big)); return TCL_OK; } else { long result = (long) d; Tcl_SetObjResult(interp, Tcl_NewLongObj(result)); return TCL_OK; } } if (type != TCL_NUMBER_NAN) { /* * All integers are already of integer type. */ Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } /* * Get the error message for NaN. */ Tcl_GetDoubleFromObj(interp, objv[1], &d); return TCL_ERROR; } static int ExprIntFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { long iResult; Tcl_Obj *objPtr; if (ExprEntierFunc(NULL, interp, objc, objv) != TCL_OK) { return TCL_ERROR; } objPtr = Tcl_GetObjResult(interp); if (TclGetLongFromObj(NULL, objPtr, &iResult) != TCL_OK) { /* * Truncate the bignum; keep only bits in long range. */ mp_int big; Tcl_GetBignumFromObj(NULL, objPtr, &big); mp_mod_2d(&big, (int) CHAR_BIT * sizeof(long), &big); objPtr = Tcl_NewBignumObj(&big); Tcl_IncrRefCount(objPtr); TclGetLongFromObj(NULL, objPtr, &iResult); Tcl_DecrRefCount(objPtr); } Tcl_SetObjResult(interp, Tcl_NewLongObj(iResult)); return TCL_OK; } static int ExprWideFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { Tcl_WideInt wResult; Tcl_Obj *objPtr; if (ExprEntierFunc(NULL, interp, objc, objv) != TCL_OK) { return TCL_ERROR; } objPtr = Tcl_GetObjResult(interp); if (Tcl_GetWideIntFromObj(NULL, objPtr, &wResult) != TCL_OK) { /* * Truncate the bignum; keep only bits in wide int range. */ mp_int big; Tcl_GetBignumFromObj(NULL, objPtr, &big); mp_mod_2d(&big, (int) CHAR_BIT * sizeof(Tcl_WideInt), &big); objPtr = Tcl_NewBignumObj(&big); Tcl_IncrRefCount(objPtr); Tcl_GetWideIntFromObj(NULL, objPtr, &wResult); Tcl_DecrRefCount(objPtr); } Tcl_SetObjResult(interp, Tcl_NewWideIntObj(wResult)); return TCL_OK; } static int ExprRandFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { Interp *iPtr = (Interp *) interp; double dResult; long tmp; /* Algorithm assumes at least 32 bits. Only * long guarantees that. See below. */ Tcl_Obj *oResult; if (objc != 1) { MathFuncWrongNumArgs(interp, 1, objc, objv); return TCL_ERROR; } if (!(iPtr->flags & RAND_SEED_INITIALIZED)) { iPtr->flags |= RAND_SEED_INITIALIZED; /* * Take into consideration the thread this interp is running in order * to insure different seeds in different threads (bug #416643) */ iPtr->randSeed = TclpGetClicks() + ((long)Tcl_GetCurrentThread()<<12); /* * Make sure 1 <= randSeed <= (2^31) - 2. See below. */ iPtr->randSeed &= (unsigned long) 0x7fffffff; if ((iPtr->randSeed == 0) || (iPtr->randSeed == 0x7fffffff)) { iPtr->randSeed ^= 123459876; } } /* * Generate the random number using the linear congruential generator * defined by the following recurrence: * seed = ( IA * seed ) mod IM * where IA is 16807 and IM is (2^31) - 1. The recurrence maps a seed in * the range [1, IM - 1] to a new seed in that same range. The recurrence * maps IM to 0, and maps 0 back to 0, so those two values must not be * allowed as initial values of seed. * * In order to avoid potential problems with integer overflow, the * recurrence is implemented in terms of additional constants IQ and IR * such that * IM = IA*IQ + IR * None of the operations in the implementation overflows a 32-bit signed * integer, and the C type long is guaranteed to be at least 32 bits wide. * * For more details on how this algorithm works, refer to the following * papers: * * S.K. Park & K.W. Miller, "Random number generators: good ones are hard * to find," Comm ACM 31(10):1192-1201, Oct 1988 * * W.H. Press & S.A. Teukolsky, "Portable random number generators," * Computers in Physics 6(5):522-524, Sep/Oct 1992. */ #define RAND_IA 16807 #define RAND_IM 2147483647 #define RAND_IQ 127773 #define RAND_IR 2836 #define RAND_MASK 123459876 tmp = iPtr->randSeed/RAND_IQ; iPtr->randSeed = RAND_IA*(iPtr->randSeed - tmp*RAND_IQ) - RAND_IR*tmp; if (iPtr->randSeed < 0) { iPtr->randSeed += RAND_IM; } /* * Since the recurrence keeps seed values in the range [1, RAND_IM - 1], * dividing by RAND_IM yields a double in the range (0, 1). */ dResult = iPtr->randSeed * (1.0/RAND_IM); /* * Push a Tcl object with the result. */ TclNewDoubleObj(oResult, dResult); Tcl_SetObjResult(interp, oResult); return TCL_OK; } static int ExprRoundFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Parameter vector. */ { double d; ClientData ptr; int type; if (objc != 2) { MathFuncWrongNumArgs(interp, 1, objc, objv); return TCL_ERROR; } if (TclGetNumberFromObj(interp, objv[1], &ptr, &type) != TCL_OK) { return TCL_ERROR; } if (type == TCL_NUMBER_DOUBLE) { double fractPart, intPart; long max = LONG_MAX, min = LONG_MIN; fractPart = modf(*((const double *) ptr), &intPart); if (fractPart <= -0.5) { min++; } else if (fractPart >= 0.5) { max--; } if ((intPart >= (double)max) || (intPart <= (double)min)) { mp_int big; if (Tcl_InitBignumFromDouble(interp, intPart, &big) != TCL_OK) { /* Infinity */ return TCL_ERROR; } if (fractPart <= -0.5) { mp_sub_d(&big, 1, &big); } else if (fractPart >= 0.5) { mp_add_d(&big, 1, &big); } Tcl_SetObjResult(interp, Tcl_NewBignumObj(&big)); return TCL_OK; } else { long result = (long)intPart; if (fractPart <= -0.5) { result--; } else if (fractPart >= 0.5) { result++; } Tcl_SetObjResult(interp, Tcl_NewLongObj(result)); return TCL_OK; } } if (type != TCL_NUMBER_NAN) { /* * All integers are already rounded */ Tcl_SetObjResult(interp, objv[1]); return TCL_OK; } /* * Get the error message for NaN. */ Tcl_GetDoubleFromObj(interp, objv[1], &d); return TCL_ERROR; } static int ExprSrandFunc( ClientData clientData, /* Ignored. */ Tcl_Interp *interp, /* The interpreter in which to execute the * function. */ int objc, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Parameter vector. */ { Interp *iPtr = (Interp *) interp; long i = 0; /* Initialized to avoid compiler warning. */ /* * Convert argument and use it to reset the seed. */ if (objc != 2) { MathFuncWrongNumArgs(interp, 2, objc, objv); return TCL_ERROR; } if (TclGetLongFromObj(NULL, objv[1], &i) != TCL_OK) { Tcl_Obj *objPtr; mp_int big; if (Tcl_GetBignumFromObj(interp, objv[1], &big) != TCL_OK) { /* TODO: more ::errorInfo here? or in caller? */ return TCL_ERROR; } mp_mod_2d(&big, (int) CHAR_BIT * sizeof(long), &big); objPtr = Tcl_NewBignumObj(&big); Tcl_IncrRefCount(objPtr); TclGetLongFromObj(NULL, objPtr, &i); Tcl_DecrRefCount(objPtr); } /* * Reset the seed. Make sure 1 <= randSeed <= 2^31 - 2. See comments in * ExprRandFunc() for more details. */ iPtr->flags |= RAND_SEED_INITIALIZED; iPtr->randSeed = i; iPtr->randSeed &= (unsigned long) 0x7fffffff; if ((iPtr->randSeed == 0) || (iPtr->randSeed == 0x7fffffff)) { iPtr->randSeed ^= 123459876; } /* * To avoid duplicating the random number generation code we simply clean * up our state and call the real random number function. That function * will always succeed. */ return ExprRandFunc(clientData, interp, 1, objv); }  /* *---------------------------------------------------------------------- * * MathFuncWrongNumArgs -- * * Generate an error message when a math function presents the wrong * number of arguments. * * Results: * None. * * Side effects: * An error message is stored in the interpreter result. * *---------------------------------------------------------------------- */ static void MathFuncWrongNumArgs( Tcl_Interp *interp, /* Tcl interpreter */ int expected, /* Formal parameter count. */ int found, /* Actual parameter count. */ Tcl_Obj *const *objv) /* Actual parameter vector. */ { const char *name = Tcl_GetString(objv[0]); const char *tail = name + strlen(name); while (tail > name+1) { --tail; if (*tail == ':' && tail[-1] == ':') { name = tail+1; break; } } Tcl_SetObjResult(interp, Tcl_ObjPrintf( "too %s arguments for math function \"%s\"", (found < expected ? "few" : "many"), name)); } #ifdef USE_DTRACE  /* *---------------------------------------------------------------------- * * DTraceObjCmd -- * * This function is invoked to process the "::tcl::dtrace" Tcl command. * * Results: * A standard Tcl object result. * * Side effects: * The 'tcl-probe' DTrace probe is triggered (if it is enabled). * *---------------------------------------------------------------------- */ static int DTraceObjCmd( ClientData dummy, /* Not used. */ Tcl_Interp *interp, /* Current interpreter. */ int objc, /* Number of arguments. */ Tcl_Obj *const objv[]) /* Argument objects. */ { if (TCL_DTRACE_TCL_PROBE_ENABLED()) { char *a[10]; int i = 0; while (i++ < 10) { a[i-1] = i < objc ? TclGetString(objv[i]) : NULL; } TCL_DTRACE_TCL_PROBE(a[0], a[1], a[2], a[3], a[4], a[5], a[6], a[7], a[8], a[9]); } return TCL_OK; }  /* *---------------------------------------------------------------------- * * TclDTraceInfo -- * * Extract information from a TIP280 dict for use by DTrace probes. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ void TclDTraceInfo( Tcl_Obj *info, char **args, int *argsi) { static Tcl_Obj *keys[7] = { NULL }; Tcl_Obj **k = keys, *val; int i; if (!*k) { TclNewLiteralStringObj(keys[0], "cmd"); TclNewLiteralStringObj(keys[1], "type"); TclNewLiteralStringObj(keys[2], "proc"); TclNewLiteralStringObj(keys[3], "file"); TclNewLiteralStringObj(keys[4], "lambda"); TclNewLiteralStringObj(keys[5], "line"); TclNewLiteralStringObj(keys[6], "level"); } for (i = 0; i < 4; i++) { Tcl_DictObjGet(NULL, info, *k++, &val); args[i] = val ? TclGetString(val) : NULL; } if (!args[2]) { Tcl_DictObjGet(NULL, info, *k, &val); args[2] = val ? TclGetString(val) : NULL; } k++; for (i = 0; i < 2; i++) { Tcl_DictObjGet(NULL, info, *k++, &val); if (val) { TclGetIntFromObj(NULL, val, &(argsi[i])); } else { argsi[i] = 0; } } } #endif /* USE_DTRACE */  /* * Local Variables: * mode: c * c-basic-offset: 4 * fill-column: 78 * End: */

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