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|
/*
* 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.
*
* 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 1.136.2.32 2005/08/30 15:54:29 dgp Exp $
*/
#include "tclInt.h"
#include "tclCompile.h"
#include <float.h>
#include <math.h>
#include "tommath.h"
/*
* The following structure defines the client data for a math function
* registered with Tcl_CreateMathFunc
*/
typedef struct OldMathFuncData {
Tcl_MathProc* proc; /* Handler procedure */
int numArgs; /* Number of args expected */
Tcl_ValueType* argTypes; /* Types of the args */
ClientData clientData; /* Client data for the handler function */
} OldMathFuncData;
/*
* Static procedures in this file:
*/
static char * CallCommandTraces _ANSI_ARGS_((Interp *iPtr, Command *cmdPtr,
CONST char *oldName, CONST char* newName, int flags));
static int CheckDoubleResult _ANSI_ARGS_((Tcl_Interp *interp,
double dResult));
static void DeleteInterpProc _ANSI_ARGS_((Tcl_Interp *interp));
static void ProcessUnexpectedResult _ANSI_ARGS_((Tcl_Interp *interp,
int returnCode));
static int OldMathFuncProc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static void OldMathFuncDeleteProc _ANSI_ARGS_((ClientData));
static int ExprAbsFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprBinaryFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprBoolFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprCeilFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprDoubleFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprEntierFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprFloorFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprIntFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprRandFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprRoundFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprSqrtFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprSrandFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprUnaryFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
static int ExprWideFunc _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, Tcl_Obj *CONST *objv));
#if 0
static int VerifyExprObjType _ANSI_ARGS_((Tcl_Interp *interp,
Tcl_Obj *objPtr));
#endif
static void MathFuncWrongNumArgs _ANSI_ARGS_((Tcl_Interp* interp,
int expected, int actual, Tcl_Obj *CONST *objv));
#if 0
#ifndef TCL_WIDE_INT_IS_LONG
/*
* Extract a double value from a general numeric object.
*/
#define GET_DOUBLE_VALUE(doubleVar, objPtr, typePtr) \
if ((typePtr) == &tclIntType) { \
(doubleVar) = (double) (objPtr)->internalRep.longValue; \
} else if ((typePtr) == &tclWideIntType) { \
(doubleVar) = Tcl_WideAsDouble((objPtr)->internalRep.wideValue);\
} else { \
(doubleVar) = (objPtr)->internalRep.doubleValue; \
}
#else /* TCL_WIDE_INT_IS_LONG */
#define GET_DOUBLE_VALUE(doubleVar, objPtr, typePtr) \
if (((typePtr) == &tclIntType) || ((typePtr) == &tclWideIntType)) { \
(doubleVar) = (double) (objPtr)->internalRep.longValue; \
} else { \
(doubleVar) = (objPtr)->internalRep.doubleValue; \
}
#endif /* TCL_WIDE_INT_IS_LONG */
#define GET_WIDE_OR_INT(resultVar, objPtr, longVar, wideVar) \
(resultVar) = Tcl_GetWideIntFromObj((Tcl_Interp *) NULL, (objPtr), \
&(wideVar)); \
if ((resultVar) == TCL_OK && (wideVar) >= Tcl_LongAsWide(LONG_MIN) \
&& (wideVar) <= Tcl_LongAsWide(LONG_MAX)) { \
(objPtr)->typePtr = &tclIntType; \
(objPtr)->internalRep.longValue = (longVar) \
= Tcl_WideAsLong(wideVar); \
}
#define IS_INTEGER_TYPE(typePtr) \
((typePtr) == &tclIntType || (typePtr) == &tclWideIntType)
#define IS_NUMERIC_TYPE(typePtr) \
(IS_INTEGER_TYPE(typePtr) || (typePtr) == &tclDoubleType)
#endif
extern TclStubs tclStubs;
/*
* The following structure defines the commands in the Tcl core.
*/
typedef struct {
char *name; /* Name of object-based command. */
Tcl_ObjCmdProc *objProc; /* Object-based procedure for command. */
CompileProc *compileProc; /* Procedure 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 procedures that implement them:
*/
static CmdInfo builtInCmds[] = {
/*
* Commands in the generic core.
*/
{"append", Tcl_AppendObjCmd, TclCompileAppendCmd, 1},
{"array", Tcl_ArrayObjCmd, (CompileProc *) NULL, 1},
{"binary", Tcl_BinaryObjCmd, (CompileProc *) NULL, 1},
{"break", Tcl_BreakObjCmd, TclCompileBreakCmd, 1},
{"case", Tcl_CaseObjCmd, (CompileProc *) NULL, 1},
{"catch", Tcl_CatchObjCmd, TclCompileCatchCmd, 1},
{"concat", Tcl_ConcatObjCmd, (CompileProc *) NULL, 1},
{"continue", Tcl_ContinueObjCmd, TclCompileContinueCmd, 1},
{"dict", Tcl_DictObjCmd, TclCompileDictCmd, 1},
{"encoding", Tcl_EncodingObjCmd, (CompileProc *) NULL, 0},
{"error", Tcl_ErrorObjCmd, (CompileProc *) NULL, 1},
{"eval", Tcl_EvalObjCmd, (CompileProc *) NULL, 1},
{"exit", Tcl_ExitObjCmd, (CompileProc *) NULL, 0},
{"expr", Tcl_ExprObjCmd, TclCompileExprCmd, 1},
{"fcopy", Tcl_FcopyObjCmd, (CompileProc *) NULL, 1},
{"fileevent", Tcl_FileEventObjCmd, (CompileProc *) NULL, 1},
{"for", Tcl_ForObjCmd, TclCompileForCmd, 1},
{"foreach", Tcl_ForeachObjCmd, TclCompileForeachCmd, 1},
{"format", Tcl_FormatObjCmd, (CompileProc *) NULL, 1},
{"global", Tcl_GlobalObjCmd, (CompileProc *) NULL, 1},
{"if", Tcl_IfObjCmd, TclCompileIfCmd, 1},
{"incr", Tcl_IncrObjCmd, TclCompileIncrCmd, 1},
{"info", Tcl_InfoObjCmd, (CompileProc *) NULL, 1},
{"join", Tcl_JoinObjCmd, (CompileProc *) NULL, 1},
{"lappend", Tcl_LappendObjCmd, TclCompileLappendCmd, 1},
{"lassign", Tcl_LassignObjCmd, TclCompileLassignCmd, 1},
{"lindex", Tcl_LindexObjCmd, TclCompileLindexCmd, 1},
{"linsert", Tcl_LinsertObjCmd, (CompileProc *) NULL, 1},
{"list", Tcl_ListObjCmd, TclCompileListCmd, 1},
{"llength", Tcl_LlengthObjCmd, TclCompileLlengthCmd, 1},
{"load", Tcl_LoadObjCmd, (CompileProc *) NULL, 0},
{"lrange", Tcl_LrangeObjCmd, (CompileProc *) NULL, 1},
{"lrepeat", Tcl_LrepeatObjCmd, (CompileProc *) NULL, 1},
{"lreplace", Tcl_LreplaceObjCmd, (CompileProc *) NULL, 1},
{"lsearch", Tcl_LsearchObjCmd, (CompileProc *) NULL, 1},
{"lset", Tcl_LsetObjCmd, TclCompileLsetCmd, 1},
{"lsort", Tcl_LsortObjCmd, (CompileProc *) NULL, 1},
{"namespace", Tcl_NamespaceObjCmd, (CompileProc *) NULL, 1},
{"package", Tcl_PackageObjCmd, (CompileProc *) NULL, 1},
{"proc", Tcl_ProcObjCmd, (CompileProc *) NULL, 1},
{"regexp", Tcl_RegexpObjCmd, TclCompileRegexpCmd, 1},
{"regsub", Tcl_RegsubObjCmd, (CompileProc *) NULL, 1},
{"rename", Tcl_RenameObjCmd, (CompileProc *) NULL, 1},
{"return", Tcl_ReturnObjCmd, TclCompileReturnCmd, 1},
{"scan", Tcl_ScanObjCmd, (CompileProc *) NULL, 1},
{"set", Tcl_SetObjCmd, TclCompileSetCmd, 1},
{"split", Tcl_SplitObjCmd, (CompileProc *) NULL, 1},
{"string", Tcl_StringObjCmd, TclCompileStringCmd, 1},
{"subst", Tcl_SubstObjCmd, (CompileProc *) NULL, 1},
{"switch", Tcl_SwitchObjCmd, TclCompileSwitchCmd, 1},
{"trace", Tcl_TraceObjCmd, (CompileProc *) NULL, 1},
{"unload", Tcl_UnloadObjCmd, (CompileProc *) NULL, 1},
{"unset", Tcl_UnsetObjCmd, (CompileProc *) NULL, 1},
{"uplevel", Tcl_UplevelObjCmd, (CompileProc *) NULL, 1},
{"upvar", Tcl_UpvarObjCmd, (CompileProc *) NULL, 1},
{"variable", Tcl_VariableObjCmd, (CompileProc *) NULL, 1},
{"while", Tcl_WhileObjCmd, TclCompileWhileCmd, 1},
/*
* Commands in the UNIX core:
*/
#ifndef TCL_GENERIC_ONLY
{"after", Tcl_AfterObjCmd, (CompileProc *) NULL, 1},
{"cd", Tcl_CdObjCmd, (CompileProc *) NULL, 0},
{"close", Tcl_CloseObjCmd, (CompileProc *) NULL, 1},
{"eof", Tcl_EofObjCmd, (CompileProc *) NULL, 1},
{"fblocked", Tcl_FblockedObjCmd, (CompileProc *) NULL, 1},
{"fconfigure", Tcl_FconfigureObjCmd, (CompileProc *) NULL, 0},
{"file", Tcl_FileObjCmd, (CompileProc *) NULL, 0},
{"flush", Tcl_FlushObjCmd, (CompileProc *) NULL, 1},
{"gets", Tcl_GetsObjCmd, (CompileProc *) NULL, 1},
{"glob", Tcl_GlobObjCmd, (CompileProc *) NULL, 0},
{"open", Tcl_OpenObjCmd, (CompileProc *) NULL, 0},
{"pid", Tcl_PidObjCmd, (CompileProc *) NULL, 1},
{"puts", Tcl_PutsObjCmd, (CompileProc *) NULL, 1},
{"pwd", Tcl_PwdObjCmd, (CompileProc *) NULL, 0},
{"read", Tcl_ReadObjCmd, (CompileProc *) NULL, 1},
{"seek", Tcl_SeekObjCmd, (CompileProc *) NULL, 1},
{"socket", Tcl_SocketObjCmd, (CompileProc *) NULL, 0},
{"tell", Tcl_TellObjCmd, (CompileProc *) NULL, 1},
{"time", Tcl_TimeObjCmd, (CompileProc *) NULL, 1},
{"update", Tcl_UpdateObjCmd, (CompileProc *) NULL, 1},
{"vwait", Tcl_VwaitObjCmd, (CompileProc *) NULL, 1},
{"exec", Tcl_ExecObjCmd, (CompileProc *) NULL, 0},
{"source", Tcl_SourceObjCmd, (CompileProc *) NULL, 0},
#endif /* TCL_GENERIC_ONLY */
{NULL, (Tcl_ObjCmdProc *) NULL, (CompileProc *) NULL, 0}
};
/*
* Math functions
*/
typedef struct {
CONST char* name; /* Name of the function */
Tcl_ObjCmdProc* objCmdProc; /* Procedure that evaluates the function */
ClientData clientData; /* Client data for the procedure */
} BuiltinFuncDef;
static BuiltinFuncDef BuiltinFuncTable[] = {
{ "::tcl::mathfunc::abs", ExprAbsFunc, NULL },
{ "::tcl::mathfunc::acos", ExprUnaryFunc, (ClientData) acos },
{ "::tcl::mathfunc::asin", ExprUnaryFunc, (ClientData) asin },
{ "::tcl::mathfunc::atan", ExprUnaryFunc, (ClientData) atan },
{ "::tcl::mathfunc::atan2", ExprBinaryFunc, (ClientData) atan2 },
{ "::tcl::mathfunc::bool", ExprBoolFunc, NULL },
{ "::tcl::mathfunc::ceil", ExprCeilFunc, NULL },
{ "::tcl::mathfunc::cos", ExprUnaryFunc, (ClientData) cos },
{ "::tcl::mathfunc::cosh", ExprUnaryFunc, (ClientData) cosh },
{ "::tcl::mathfunc::double",ExprDoubleFunc, NULL },
{ "::tcl::mathfunc::entier",ExprEntierFunc, NULL },
{ "::tcl::mathfunc::exp", ExprUnaryFunc, (ClientData) exp },
{ "::tcl::mathfunc::floor", ExprFloorFunc, NULL },
{ "::tcl::mathfunc::fmod", ExprBinaryFunc, (ClientData) fmod },
{ "::tcl::mathfunc::hypot", ExprBinaryFunc, (ClientData) hypot },
{ "::tcl::mathfunc::int", ExprIntFunc, NULL },
{ "::tcl::mathfunc::log", ExprUnaryFunc, (ClientData) log },
{ "::tcl::mathfunc::log10", ExprUnaryFunc, (ClientData) log10 },
{ "::tcl::mathfunc::pow", ExprBinaryFunc, (ClientData) pow },
{ "::tcl::mathfunc::rand", ExprRandFunc, NULL },
{ "::tcl::mathfunc::round", ExprRoundFunc, NULL },
{ "::tcl::mathfunc::sin", ExprUnaryFunc, (ClientData) sin },
{ "::tcl::mathfunc::sinh", ExprUnaryFunc, (ClientData) sinh },
{ "::tcl::mathfunc::sqrt", ExprSqrtFunc, NULL },
{ "::tcl::mathfunc::srand", ExprSrandFunc, NULL },
{ "::tcl::mathfunc::tan", ExprUnaryFunc, (ClientData) tan },
{ "::tcl::mathfunc::tanh", ExprUnaryFunc, (ClientData) tanh },
{ "::tcl::mathfunc::wide", ExprWideFunc, NULL },
{ NULL, NULL, NULL }
};
/*
*----------------------------------------------------------------------
*
* 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 procedures 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()
{
Interp *iPtr;
Tcl_Interp *interp;
Command *cmdPtr;
BuiltinFuncDef *builtinFuncPtr;
const CmdInfo *cmdInfoPtr;
Tcl_Namespace* mathfuncNSPtr;
int i;
union {
char c[sizeof(short)];
short s;
} order;
#ifdef TCL_COMPILE_STATS
ByteCodeStats *statsPtr;
#endif /* TCL_COMPILE_STATS */
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;
iPtr->varFramePtr = NULL;
iPtr->activeVarTracePtr = NULL;
iPtr->returnOpts = NULL;
iPtr->errorInfo = NULL;
iPtr->eiVar = Tcl_NewStringObj("errorInfo", -1);
Tcl_IncrRefCount(iPtr->eiVar);
iPtr->errorCode = NULL;
iPtr->ecVar = Tcl_NewStringObj("errorCode", -1);
Tcl_IncrRefCount(iPtr->ecVar);
iPtr->returnLevel = 1;
iPtr->returnCode = TCL_OK;
iPtr->appendResult = NULL;
iPtr->appendAvl = 0;
iPtr->appendUsed = 0;
Tcl_InitHashTable(&iPtr->packageTable, TCL_STRING_KEYS);
iPtr->packageUnknown = NULL;
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 = (Tcl_HashTable *) NULL;
iPtr->execEnvPtr = NULL; /* set after namespaces initialized */
iPtr->emptyObjPtr = Tcl_NewObj(); /* another empty object */
Tcl_IncrRefCount(iPtr->emptyObjPtr);
iPtr->resultSpace[0] = 0;
iPtr->globalNsPtr = NULL; /* force creation of global ns below */
iPtr->globalNsPtr = (Namespace *) Tcl_CreateNamespace(interp, "",
(ClientData) NULL, (Tcl_NamespaceDeleteProc *) NULL);
if (iPtr->globalNsPtr == NULL) {
Tcl_Panic("Tcl_CreateInterp: can't create global namespace");
}
/*
* 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 */
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);
/*
* 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 procedure
* that extracts strings, calls the string procedure, 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 new;
Tcl_HashEntry *hPtr;
if ((cmdInfoPtr->objProc == (Tcl_ObjCmdProc *) NULL)
&& (cmdInfoPtr->compileProc == (CompileProc *) NULL)) {
Tcl_Panic("Tcl_CreateInterp: builtin command with NULL object command proc and a NULL compile proc\n");
}
hPtr = Tcl_CreateHashEntry(&iPtr->globalNsPtr->cmdTable,
cmdInfoPtr->name, &new);
if (new) {
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 = (ClientData) cmdPtr;
cmdPtr->objProc = cmdInfoPtr->objProc;
cmdPtr->objClientData = (ClientData) NULL;
cmdPtr->deleteProc = NULL;
cmdPtr->deleteData = (ClientData) NULL;
cmdPtr->flags = 0;
cmdPtr->importRefPtr = NULL;
cmdPtr->tracePtr = NULL;
Tcl_SetHashValue(hPtr, cmdPtr);
}
}
/*
* Register the clock commands. These *do* go through
* Tcl_CreateObjCommand, since they aren't in the global namespace.
*/
Tcl_CreateObjCommand(interp, "::tcl::clock::clicks",
TclClockClicksObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::getenv",
TclClockGetenvObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::microseconds",
TclClockMicrosecondsObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::milliseconds",
TclClockMillisecondsObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::seconds",
TclClockSecondsObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::Localtime",
TclClockLocaltimeObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::Mktime",
TclClockMktimeObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::clock::Oldscan",
TclClockOldscanObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
/* TIP #208 */
Tcl_CreateObjCommand(interp, "::tcl::chan::Truncate",
TclChanTruncateObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
/* TIP #219 */
Tcl_CreateObjCommand(interp, "::tcl::chan::rCreate",
TclChanCreateObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
Tcl_CreateObjCommand(interp, "::tcl::chan::rPostevent",
TclChanPostEventObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
/*
* Register the built-in functions
*/
/* Register the default [interp bgerror] handler. */
Tcl_CreateObjCommand(interp, "::tcl::Bgerror",
TclDefaultBgErrorHandlerObjCmd, (ClientData) NULL,
(Tcl_CmdDeleteProc*) NULL);
/* Register the unsupported encoding search path command */
Tcl_CreateObjCommand(interp, "::tcl::unsupported::EncodingDirs",
TclEncodingDirsObjCmd, NULL, NULL);
/*
* Register the builtin math functions.
*/
mathfuncNSPtr = Tcl_CreateNamespace(interp, "::tcl::mathfunc",
(ClientData) NULL, (Tcl_NamespaceDeleteProc*) NULL);
if (mathfuncNSPtr == NULL) {
Tcl_Panic("Can't create math function namespace");
}
i = 0;
for (;;) {
CONST char* tail;
builtinFuncPtr = &(BuiltinFuncTable[i++]);
if (builtinFuncPtr->name == NULL) {
break;
}
Tcl_CreateObjCommand(interp, builtinFuncPtr->name,
builtinFuncPtr->objCmdProc, builtinFuncPtr->clientData,
(Tcl_CmdDeleteProc*) NULL);
tail = builtinFuncPtr->name + strlen("::tcl::mathfunc::");
Tcl_Export(interp, mathfuncNSPtr, tail, 0);
}
/*
* Do Multiple/Safe Interps Tcl init stuff
*/
TclInterpInit(interp);
#ifndef TCL_GENERIC_ONLY
TclSetupEnv(interp);
#endif
/*
* 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);
/*
* 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", (char *) NULL,
TCL_GLOBAL_ONLY|TCL_TRACE_READS|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
TclPrecTraceProc, (ClientData) 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.
*/
Tcl_PkgProvideEx(interp, "Tcl", TCL_VERSION, (ClientData) &tclStubs);
#ifdef Tcl_InitStubs
#undef Tcl_InitStubs
#endif
Tcl_InitStubs(interp, TCL_VERSION, 1);
return interp;
}
/*
*----------------------------------------------------------------------
*
* 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(interp)
Tcl_Interp *interp; /* Hide commands in this interpreter. */
{
register const CmdInfo *cmdInfoPtr;
if (interp == (Tcl_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 procedure to be called before a given
* interpreter is deleted. The procedure is called as soon
* as Tcl_DeleteInterp is called; if Tcl_CallWhenDeleted is
* called on an interpreter that has already been deleted,
* the procedure 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(interp, proc, clientData)
Tcl_Interp *interp; /* Interpreter to watch. */
Tcl_InterpDeleteProc *proc; /* Procedure 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 new;
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 == (Tcl_HashTable *) NULL) {
iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable));
Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS);
}
hPtr = Tcl_CreateHashEntry(iPtr->assocData, buffer, &new);
dPtr->proc = proc;
dPtr->clientData = clientData;
Tcl_SetHashValue(hPtr, dPtr);
}
/*
*--------------------------------------------------------------
*
* Tcl_DontCallWhenDeleted --
*
* Cancel the arrangement for a procedure 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(interp, proc, clientData)
Tcl_Interp *interp; /* Interpreter to watch. */
Tcl_InterpDeleteProc *proc; /* Procedure 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 == (Tcl_HashTable *) 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(interp, name, proc, clientData)
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 new;
if (iPtr->assocData == (Tcl_HashTable *) NULL) {
iPtr->assocData = (Tcl_HashTable *) ckalloc(sizeof(Tcl_HashTable));
Tcl_InitHashTable(iPtr->assocData, TCL_STRING_KEYS);
}
hPtr = Tcl_CreateHashEntry(iPtr->assocData, name, &new);
if (new == 0) {
dPtr = (AssocData *) 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(interp, name)
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 == (Tcl_HashTable *) NULL) {
return;
}
hPtr = Tcl_FindHashEntry(iPtr->assocData, name);
if (hPtr == (Tcl_HashEntry *) NULL) {
return;
}
dPtr = (AssocData *) 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(interp, name, procPtr)
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 == (Tcl_HashTable *) NULL) {
return (ClientData) NULL;
}
hPtr = Tcl_FindHashEntry(iPtr->assocData, name);
if (hPtr == (Tcl_HashEntry *) NULL) {
return (ClientData) NULL;
}
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
if (procPtr != (Tcl_InterpDeleteProc **) 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(interp)
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 procedure 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(interp)
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++;
/* TIP #219, Tcl Channel Reflection API.
* Discard a leftover state.
*/
if (iPtr->chanMsg != NULL) {
Tcl_DecrRefCount (iPtr->chanMsg);
iPtr->chanMsg = NULL;
}
/*
* Ensure that the interpreter is eventually deleted.
*/
Tcl_EventuallyFree((ClientData) interp, (Tcl_FreeProc *) DeleteInterpProc);
}
/*
*----------------------------------------------------------------------
*
* DeleteInterpProc --
*
* Helper procedure to delete an interpreter. This procedure is
* called when the last call to Tcl_Preserve on this interpreter
* is matched by a call to Tcl_Release. The procedure 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(interp)
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");
}
/*
* 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 != (Tcl_HashTable *) NULL) {
AssocData *dPtr;
hTablePtr = iPtr->assocData;
iPtr->assocData = (Tcl_HashTable *) NULL;
for (hPtr = Tcl_FirstHashEntry(hTablePtr, &search);
hPtr != NULL;
hPtr = Tcl_FirstHashEntry(hTablePtr, &search)) {
dPtr = (AssocData *) Tcl_GetHashValue(hPtr);
Tcl_DeleteHashEntry(hPtr);
if (dPtr->proc != NULL) {
(*dPtr->proc)(dPtr->clientData, interp);
}
ckfree((char *) dPtr);
}
Tcl_DeleteHashTable(hTablePtr);
ckfree((char *) hTablePtr);
}
/*
* Finish deleting the global namespace.
*/
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));
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(interp, cmdName, hiddenCmdToken)
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 new;
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)", (char *) 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, (Tcl_Namespace *) 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)", (char *) 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, &new);
if (!new) {
Tcl_AppendResult(interp, "hidden command named \"", hiddenCmdToken,
"\" already exists", (char *) 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 untill 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 = (Tcl_HashEntry *) 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, (ClientData) cmdPtr);
/*
* If the command being hidden has a compile procedure, 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(interp, hiddenCmdToken, cmdName)
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 new;
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, "can not expose to a namespace ",
"(use expose to toplevel, then rename)", (char *) 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 == (Tcl_HashEntry *) NULL) {
Tcl_AppendResult(interp, "unknown hidden command \"", hiddenCmdToken,
"\"", (char *) NULL);
return TCL_ERROR;
}
cmdPtr = (Command *) 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",
(char *) 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, &new);
if (!new) {
Tcl_AppendResult(interp, "exposed command \"", cmdName,
"\" already exists", (char *) 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, (ClientData) 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 procedure, 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(interp, cmdName, proc, clientData, deleteProc)
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; /* Procedure to associate with cmdName. */
ClientData clientData; /* Arbitrary value passed to string proc. */
Tcl_CmdDeleteProc *deleteProc;
/* If not NULL, gives a procedure 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 new;
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, (Namespace *) 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, &new);
if (!new) {
/*
* 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 = (Command *) Tcl_GetHashValue(hPtr);
oldRefPtr = cmdPtr->importRefPtr;
cmdPtr->importRefPtr = NULL;
Tcl_DeleteCommandFromToken(interp, (Tcl_Command) cmdPtr);
hPtr = Tcl_CreateHashEntry(&nsPtr->cmdTable, tail, &new);
if (!new) {
/*
* 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 = (CompileProc *) NULL;
cmdPtr->objProc = TclInvokeStringCommand;
cmdPtr->objClientData = (ClientData) 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 = (ImportedCmdData*)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(interp, cmdName, proc, clientData, deleteProc)
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 procedure to associate with
* name. */
ClientData clientData; /* Arbitrary value to pass to object
* procedure. */
Tcl_CmdDeleteProc *deleteProc;
/* If not NULL, gives a procedure 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 new;
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, (Namespace *) 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, &new);
TclInvalidateNsPath(nsPtr);
if (!new) {
cmdPtr = (Command *) 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, &new);
if (!new) {
/*
* 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 = (CompileProc *) NULL;
cmdPtr->objProc = proc;
cmdPtr->objClientData = clientData;
cmdPtr->proc = TclInvokeObjectCommand;
cmdPtr->clientData = (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 = (ImportedCmdData*)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 procedure exists for a command. A
* pointer to this procedure 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, interp, objc, objv)
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. */
{
register Command *cmdPtr = (Command *) clientData;
register int i;
int result;
/*
* This procedure generates an argv array for the string arguments. It
* starts out with stack-allocated space but uses dynamically-allocated
* storage if needed.
*/
#define NUM_ARGS 20
CONST char *(argStorage[NUM_ARGS]);
CONST char **argv = argStorage;
/*
* Create the string argument array "argv". Make sure argv is large
* enough to hold the objc arguments plus 1 extra for the zero
* end-of-argv word.
*/
if ((objc + 1) > NUM_ARGS) {
argv = (CONST char **) ckalloc((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);
/*
* Free the argv array if malloc'ed storage was used.
*/
if (argv != argStorage) {
ckfree((char *) argv);
}
return result;
#undef NUM_ARGS
}
/*
*----------------------------------------------------------------------
*
* TclInvokeObjectCommand --
*
* "Wrapper" Tcl_CmdProc used to call an existing object-based
* Tcl_ObjCmdProc if no string-based procedure exists for a command.
* A pointer to this procedure 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, interp, argc, argv)
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;
register Tcl_Obj *objPtr;
register int i;
int length, result;
/*
* This procedure generates an objv array for object arguments that hold
* the argv strings. It starts out with stack-allocated space but uses
* dynamically-allocated storage if needed.
*/
#define NUM_ARGS 20
Tcl_Obj *(argStorage[NUM_ARGS]);
register Tcl_Obj **objv = argStorage;
/*
* Create the object argument array "objv". Make sure objv is large
* enough to hold the objc arguments plus 1 extra for the zero
* end-of-objv word.
*/
if (argc > NUM_ARGS) {
objv = (Tcl_Obj **) ckalloc((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);
}
if (objv != argStorage) {
ckfree((char *) objv);
}
return result;
#undef NUM_ARGS
}
/*
*----------------------------------------------------------------------
*
* 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(interp, oldName, newName)
Tcl_Interp *interp; /* Current interpreter. */
char *oldName; /* Existing command name. */
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 new, 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, (Tcl_Namespace *) 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", (char *) 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, (Namespace *) 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", (char *) NULL);
result = TCL_ERROR;
goto done;
}
if (Tcl_FindHashEntry(&newNsPtr->cmdTable, newTail) != NULL) {
Tcl_AppendResult(interp, "can't rename to \"", newName,
"\": command already exists", (char *) 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, &new);
Tcl_SetHashValue(hPtr, (ClientData) 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 procedure needs to get a fully qualified name for
* old and new commands [Tcl bug #651271], or else there's no way
* for the trace procedure 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 procedure, 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.
*/
TclCleanupCommand(cmdPtr);
result = TCL_OK;
done:
TclDecrRefCount(oldFullName);
return result;
}
/*
*----------------------------------------------------------------------
*
* Tcl_SetCommandInfo --
*
* Modifies various information about a Tcl command. Note that
* this procedure 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(interp, cmdName, infoPtr)
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, (Tcl_Namespace *) NULL,
/*flags*/ 0);
return Tcl_SetCommandInfoFromToken(cmd, infoPtr);
}
/*
*----------------------------------------------------------------------
*
* Tcl_SetCommandInfoFromToken --
*
* Modifies various information about a Tcl command. Note that
* this procedure 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(cmd, infoPtr)
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 == (Tcl_ObjCmdProc *) NULL) {
cmdPtr->objProc = TclInvokeStringCommand;
cmdPtr->objClientData = (ClientData) 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(interp, cmdName, infoPtr)
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, (Tcl_Namespace *) 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(cmd, infoPtr)
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 procedure
* 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(interp, command)
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 procedure 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(interp, command, objPtr)
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(interp, cmdName)
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, (Tcl_Namespace *) 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 procedure
* 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(interp, cmd)
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;
/*
* 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 procedures 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 procedure, 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);
}
/*
* Bump the command epoch counter. This will invalidate all cached
* references that point to this command.
*/
cmdPtr->cmdEpoch++;
/*
* 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);
}
/*
* 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).
*/
TclCleanupCommand(cmdPtr);
return 0;
}
static char *
CallCommandTraces(iPtr, cmdPtr, oldName, newName, flags)
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;
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((ClientData) 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++;
(*tracePtr->traceProc)(tracePtr->clientData,
(Tcl_Interp *) iPtr, oldName, newName, flags);
cmdPtr->flags &= ~tracePtr->flags;
if ((--tracePtr->refCount) <= 0) {
ckfree((char*)tracePtr);
}
}
/*
* 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((ClientData) iPtr);
return result;
}
/*
*----------------------------------------------------------------------
*
* TclCleanupCommand --
*
* This procedure 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(cmdPtr)
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 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(interp, name, numArgs, argTypes, proc, clientData)
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; /* Procedure that implements the
* math function. */
ClientData clientData; /* Additional value to pass to the
* function. */
{
Tcl_DString bigName;
OldMathFuncData* data = (OldMathFuncData*)
Tcl_Alloc(sizeof(OldMathFuncData));
if (numArgs > MAX_MATH_ARGS) {
Tcl_Panic("attempt to create a math function with too many args");
}
data->proc = proc;
data->numArgs = numArgs;
data->argTypes = (Tcl_ValueType*)
Tcl_Alloc(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, (ClientData) 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, interp, objc, objv)
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 = (OldMathFuncData*) clientData;
Tcl_Value args[MAX_MATH_ARGS];
Tcl_Value funcResult;
int result;
#if 0
int i;
#endif
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 */
#if 0
for (j = 1, k = 0; j < objc; ++j, ++k) {
valuePtr = objv[j];
if (VerifyExprObjType(interp, valuePtr) != TCL_OK) {
return TCL_ERROR;
}
/*
* Copy the object's numeric value to the argument record,
* converting it if necessary.
*/
if (valuePtr->typePtr == &tclIntType) {
i = valuePtr->internalRep.longValue;
if (dataPtr->argTypes[k] == TCL_DOUBLE) {
args[k].type = TCL_DOUBLE;
args[k].doubleValue = i;
} else if (dataPtr->argTypes[k] == TCL_WIDE_INT) {
args[k].type = TCL_WIDE_INT;
args[k].wideValue = Tcl_LongAsWide(i);
} else {
args[k].type = TCL_INT;
args[k].intValue = i;
}
} else if (valuePtr->typePtr == &tclWideIntType) {
Tcl_WideInt w;
TclGetWide(w,valuePtr);
if (dataPtr->argTypes[k] == TCL_DOUBLE) {
args[k].type = TCL_DOUBLE;
args[k].doubleValue = Tcl_WideAsDouble(w);
} else if (dataPtr->argTypes[k] == TCL_INT) {
args[k].type = TCL_INT;
args[k].intValue = Tcl_WideAsLong(w);
} else {
args[k].type = TCL_WIDE_INT;
args[k].wideValue = w;
}
} else {
d = valuePtr->internalRep.doubleValue;
if (dataPtr->argTypes[k] == TCL_INT) {
args[k].type = TCL_INT;
args[k].intValue = (long) d;
} else if (dataPtr->argTypes[k] == TCL_WIDE_INT) {
args[k].type = TCL_WIDE_INT;
args[k].wideValue = Tcl_DoubleAsWide(d);
} else {
args[k].type = TCL_DOUBLE;
args[k].doubleValue = d;
}
}
}
#else
for (j = 1, k = 0; j < objc; ++j, ++k) {
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) {
/* Non-numeric argument */
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"argument to math function didn't have numeric value", -1));
TclCheckBadOctal(interp, Tcl_GetString(valuePtr));
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) {
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) {
return TCL_ERROR;
}
valuePtr = Tcl_GetObjResult(interp);
Tcl_GetWideIntFromObj(NULL, valuePtr, &(args[k].wideValue));
Tcl_ResetResult(interp);
break;
}
}
#endif
/* Call the function */
errno = 0;
result = (*dataPtr->proc)(dataPtr->clientData, interp, args,
&funcResult);
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 clientData;
{
OldMathFuncData* dataPtr = (OldMathFuncData*) clientData;
Tcl_Free((VOID*) dataPtr->argTypes);
Tcl_Free((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(interp, name, numArgsPtr, argTypesPtr, procPtr,
clientDataPtr)
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 */
cmdNameObj = Tcl_NewStringObj("tcl::mathfunc::", -1);
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;
message = Tcl_NewStringObj("unknown math function \"", -1);
Tcl_AppendToObj(message, name, -1);
Tcl_AppendToObj(message, "\"", 1);
*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 = (OldMathFuncData*) 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(interp, pattern)
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();
Tcl_HashEntry* cmdHashEntry;
Tcl_HashSearch cmdHashSearch;
CONST char* cmdNamePtr;
TclGetNamespaceForQualName(interp, "::tcl::mathfunc",
globalNsPtr, TCL_FIND_ONLY_NS | TCL_GLOBAL_ONLY,
&nsPtr, &dummy1NsPtr, &dummy2NsPtr, &dummyNamePtr);
if (nsPtr != NULL) {
if ((pattern != NULL) && TclMatchIsTrivial(pattern)) {
if (Tcl_FindHashEntry(&nsPtr->cmdTable, pattern) != NULL) {
Tcl_ListObjAppendElement(NULL, result,
Tcl_NewStringObj(pattern, -1));
}
} else {
cmdHashEntry = Tcl_FirstHashEntry(&nsPtr->cmdTable,&cmdHashSearch);
for (; cmdHashEntry != NULL;
cmdHashEntry = Tcl_NextHashEntry(&cmdHashSearch)) {
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(interp)
Tcl_Interp *interp;
{
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", (char *) NULL);
Tcl_SetErrorCode(interp, "CORE", "IDELETE",
"attempt to call eval in deleted interpreter", (char *) 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)
|| (TclpCheckStackSpace() == 0)) {
Tcl_AppendResult(interp,
"too many nested evaluations (infinite loop?)", (char *) NULL);
return TCL_ERROR;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* TclEvalObjvInternal --
*
* This procedure 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.
*
* 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 procedure does
* NOT add any information to the errorInfo variable.
*
* Side effects:
* Depends on the command.
*
*----------------------------------------------------------------------
*/
int
TclEvalObjvInternal(interp, objc, objv, command, length, flags)
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. If the string
* representation of the command is
* unknown, an empty string should be
* supplied. If it is NULL, no traces will
* be called. */
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; /* Saves old copy of iPtr->varFramePtr
* in case TCL_EVAL_GLOBAL was set. */
int code = TCL_OK;
int traceCode = TCL_OK;
int checkTraces = 1;
if (TclInterpReady(interp) == TCL_ERROR) {
return TCL_ERROR;
}
if (objc == 0) {
return TCL_OK;
}
/*
* Find the procedure to execute this command. If there isn't one,
* then see if there is a command "unknown". If so, create a new
* word array with "unknown" as the first word and the original
* command words as arguments. Then call ourselves recursively to
* execute it.
*
* If caller requests, or if we're resolving the target end of an
* interpeter alias (TCL_EVAL_INVOKE), be sure to do command name
* resolution in the global namespace.
*
* If any execution traces rename or delete the current command,
* we may need (at most) two passes here.
*/
reparseBecauseOfTraces:
savedVarFramePtr = iPtr->varFramePtr;
if (flags & (TCL_EVAL_INVOKE | TCL_EVAL_GLOBAL)) {
iPtr->varFramePtr = NULL;
}
cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, objv[0]);
iPtr->varFramePtr = savedVarFramePtr;
if (cmdPtr == NULL) {
newObjv = (Tcl_Obj **) ckalloc((unsigned)
((objc + 1) * sizeof(Tcl_Obj *)));
for (i = objc-1; i >= 0; i--) {
newObjv[i+1] = objv[i];
}
newObjv[0] = Tcl_NewStringObj("::unknown", -1);
Tcl_IncrRefCount(newObjv[0]);
cmdPtr = (Command *) Tcl_GetCommandFromObj(interp, newObjv[0]);
if (cmdPtr == NULL) {
Tcl_AppendResult(interp, "invalid command name \"",
TclGetString(objv[0]), "\"", (char *) NULL);
code = TCL_ERROR;
} else {
iPtr->numLevels++;
code = TclEvalObjvInternal(interp, objc+1, newObjv,
command, length, 0);
iPtr->numLevels--;
}
Tcl_DecrRefCount(newObjv[0]);
ckfree((char *) newObjv);
goto done;
}
/*
* Call trace procedures if needed.
*/
if ((checkTraces) && (command != NULL)) {
int cmdEpoch = cmdPtr->cmdEpoch;
cmdPtr->refCount++;
/*
* If the first set of traces modifies/deletes the command or
* any existing traces, then the set checkTraces to 0 and go
* through this while loop one more time.
*/
if (iPtr->tracePtr != NULL && 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);
}
cmdPtr->refCount--;
if (cmdEpoch != cmdPtr->cmdEpoch) {
/* The command has been modified in some way */
checkTraces = 0;
goto reparseBecauseOfTraces;
}
}
/*
* Finally, invoke the command's Tcl_ObjCmdProc.
*/
cmdPtr->refCount++;
iPtr->cmdCount++;
if (code == TCL_OK && traceCode == TCL_OK && !Tcl_LimitExceeded(interp)) {
savedVarFramePtr = iPtr->varFramePtr;
if (flags & TCL_EVAL_GLOBAL) {
iPtr->varFramePtr = NULL;
}
if (!(flags & TCL_EVAL_INVOKE) &&
(iPtr->ensembleRewrite.sourceObjs != NULL) &&
!Tcl_IsEnsemble((Tcl_Command) cmdPtr)) {
iPtr->ensembleRewrite.sourceObjs = NULL;
}
code = (*cmdPtr->objProc)(cmdPtr->objClientData, interp, objc, objv);
iPtr->varFramePtr = savedVarFramePtr;
}
if (Tcl_AsyncReady()) {
code = Tcl_AsyncInvoke(interp, code);
}
if (code == TCL_OK && Tcl_LimitReady(interp)) {
code = Tcl_LimitCheck(interp);
}
/*
* Call 'leave' command traces
*/
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);
}
}
TclCleanupCommand(cmdPtr);
/*
* 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 the interpreter has a non-empty string result, the result
* object is either empty or stale because some procedure set
* interp->result directly. If so, move the string result to the
* result object, then reset the string result.
*/
if (*(iPtr->result) != 0) {
(void) Tcl_GetObjResult(interp);
}
done:
return code;
}
/*
*----------------------------------------------------------------------
*
* Tcl_EvalObjv --
*
* This procedure 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(interp, objc, objv, flags)
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;
Trace *tracePtr;
Tcl_DString cmdBuf;
char *cmdString = ""; /* A command string is only necessary for
* command traces or error logs; it will be
* generated to replace this default value if
* necessary. */
int cmdLen = 0; /* a non-zero value indicates that a command
* string was generated. */
int code = TCL_OK;
int i;
int allowExceptions = (iPtr->evalFlags & TCL_ALLOW_EXCEPTIONS);
for (tracePtr = iPtr->tracePtr; tracePtr; tracePtr = tracePtr->nextPtr) {
if ((tracePtr->level == 0) || (iPtr->numLevels <= tracePtr->level)) {
/*
* The command may be needed for an execution trace. Generate a
* command string.
*/
Tcl_DStringInit(&cmdBuf);
for (i = 0; i < objc; i++) {
Tcl_DStringAppendElement(&cmdBuf, Tcl_GetString(objv[i]));
}
cmdString = Tcl_DStringValue(&cmdBuf);
cmdLen = Tcl_DStringLength(&cmdBuf);
break;
}
}
iPtr->numLevels++;
code = TclEvalObjvInternal(interp, objc, objv, cmdString, cmdLen, flags);
iPtr->numLevels--;
/*
* 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_OK) && (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 if it was not done previously.
*/
if (cmdLen == 0) {
Tcl_DStringInit(&cmdBuf);
for (i = 0; i < objc; i++) {
Tcl_DStringAppendElement(&cmdBuf, Tcl_GetString(objv[i]));
}
cmdString = Tcl_DStringValue(&cmdBuf);
cmdLen = Tcl_DStringLength(&cmdBuf);
}
Tcl_LogCommandInfo(interp, cmdString, cmdString, cmdLen);
}
if (cmdLen != 0) {
Tcl_DStringFree(&cmdBuf);
}
return code;
}
/*
*----------------------------------------------------------------------
*
* Tcl_LogCommandInfo --
*
* This procedure is invoked after an error occurs in an interpreter.
* It adds information to iPtr->errorInfo field to describe the
* command that was being executed when the error occurred.
*
* Results:
* None.
*
* Side effects:
* Information about the command is added to errorInfo and the
* line number stored internally in the interpreter is set.
*
*----------------------------------------------------------------------
*/
void
Tcl_LogCommandInfo(interp, script, command, length)
Tcl_Interp *interp; /* Interpreter in which to log information. */
CONST char *script; /* First character in script containing
* command (must be <= command). */
CONST char *command; /* First character in command that
* generated the error. */
int length; /* Number of bytes in command (-1 means
* use all bytes up to first null byte). */
{
register CONST char *p;
Interp *iPtr = (Interp *) interp;
Tcl_Obj *message;
if (iPtr->flags & ERR_ALREADY_LOGGED) {
/*
* Someone else has already logged error information for this
* command; we shouldn't add anything more.
*/
return;
}
/*
* Compute the line number where the error occurred.
*/
iPtr->errorLine = 1;
for (p = script; p != command; p++) {
if (*p == '\n') {
iPtr->errorLine++;
}
}
if (iPtr->errorInfo == NULL) {
message = Tcl_NewStringObj("\n while executing\n\"", -1);
} else {
message = Tcl_NewStringObj("\n invoked from within\n\"", -1);
}
Tcl_IncrRefCount(message);
TclAppendLimitedToObj(message, command, length, 153, NULL);
Tcl_AppendToObj(message, "\"", -1);
TclAppendObjToErrorInfo(interp, message);
Tcl_DecrRefCount(message);
}
/*
*----------------------------------------------------------------------
*
* 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 procedure 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(interp, tokenPtr, count)
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);
}
/*
*----------------------------------------------------------------------
*
* 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 procedure 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(interp, tokenPtr, count)
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. */
{
int code;
Tcl_Obj *resPtr;
code = Tcl_EvalTokensStandard(interp, tokenPtr, count);
if (code == TCL_OK) {
resPtr = Tcl_GetObjResult(interp);
Tcl_IncrRefCount(resPtr);
Tcl_ResetResult(interp);
return resPtr;
} else {
return NULL;
}
}
/*
*----------------------------------------------------------------------
*
* Tcl_EvalEx --
*
* This procedure 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.
*
*----------------------------------------------------------------------
*/
int
Tcl_EvalEx(interp, script, numBytes, flags)
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. */
{
Interp *iPtr = (Interp *) interp;
CONST char *p, *next;
Tcl_Parse parse;
#define NUM_STATIC_OBJS 20
Tcl_Obj *staticObjArray[NUM_STATIC_OBJS], **objv, **objvSpace;
int expandStatic[NUM_STATIC_OBJS], *expand;
Tcl_Token *tokenPtr;
int i, code, commandLength, bytesLeft, expandRequested;
CallFrame *savedVarFramePtr; /* Saves old copy of iPtr->varFramePtr
* in case TCL_EVAL_GLOBAL was set. */
int allowExceptions = (iPtr->evalFlags & TCL_ALLOW_EXCEPTIONS);
/*
* The variables below keep track of how much state has been
* allocated while evaluating the script, so that it can be freed
* properly if an error occurs.
*/
int gotParse = 0, objectsUsed = 0;
if (numBytes < 0) {
numBytes = strlen(script);
}
Tcl_ResetResult(interp);
savedVarFramePtr = iPtr->varFramePtr;
if (flags & TCL_EVAL_GLOBAL) {
iPtr->varFramePtr = NULL;
}
/*
* Each iteration through the following loop parses the next
* command from the script and then executes it.
*/
objv = objvSpace = staticObjArray;
expand = expandStatic;
p = script;
bytesLeft = numBytes;
iPtr->evalFlags = 0;
do {
if (Tcl_ParseCommand(interp, p, bytesLeft, 0, &parse) != TCL_OK) {
code = TCL_ERROR;
goto error;
}
gotParse = 1;
if (parse.numWords > 0) {
/*
* Generate an array of objects for the words of the command.
*/
int objectsNeeded = 0;
if (parse.numWords > NUM_STATIC_OBJS) {
expand = (int *) ckalloc((unsigned)
(parse.numWords * sizeof(int)));
objvSpace = (Tcl_Obj **) ckalloc((unsigned)
(parse.numWords * sizeof(Tcl_Obj *)));
}
expandRequested = 0;
objv = objvSpace;
for (objectsUsed = 0, tokenPtr = parse.tokenPtr;
objectsUsed < parse.numWords;
objectsUsed++, tokenPtr += (tokenPtr->numComponents + 1)) {
code = TclSubstTokens(interp, tokenPtr+1,
tokenPtr->numComponents, NULL);
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 = Tcl_ListObjLength(interp,
objv[objectsUsed], &numElements);
if (code == TCL_ERROR) {
/* Attempt to expand a non-list */
Tcl_Obj *msg;
Tcl_Obj *wordNum;
msg = Tcl_NewStringObj("\n (expanding word ", -1);
TclNewIntObj(wordNum, objectsUsed);
Tcl_IncrRefCount(wordNum);
Tcl_IncrRefCount(msg);
Tcl_AppendObjToObj(msg, wordNum);
Tcl_DecrRefCount(wordNum);
Tcl_AppendToObj(msg, ")", -1);
TclAppendObjToErrorInfo(interp, msg);
Tcl_DecrRefCount(msg);
Tcl_DecrRefCount(objv[objectsUsed]);
goto error;
}
expandRequested = 1;
expand[objectsUsed] = 1;
objectsNeeded += (numElements ? numElements : 1);
} else {
expand[objectsUsed] = 0;
objectsNeeded++;
}
}
if (expandRequested) {
/* Some word expansion was requested. Check for objv resize */
Tcl_Obj **copy = objvSpace;
int wordIdx = parse.numWords;
int objIdx = objectsNeeded - 1;
if ((parse.numWords > NUM_STATIC_OBJS)
|| (objectsNeeded > NUM_STATIC_OBJS)) {
objv = objvSpace = (Tcl_Obj **) ckalloc((unsigned)
(objectsNeeded * sizeof(Tcl_Obj *)));
}
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--) {
objv[objIdx--] = elements[numElements];
Tcl_IncrRefCount(elements[numElements]);
}
Tcl_DecrRefCount(temp);
} else {
objv[objIdx--] = copy[wordIdx];
objectsUsed++;
}
}
objv += objIdx+1;
if (copy != staticObjArray) {
ckfree((char *) copy);
}
}
/*
* Execute the command and free the objects for its words.
*/
iPtr->numLevels++;
code = TclEvalObjvInternal(interp, objectsUsed, objv,
parse.commandStart, parse.commandSize, 0);
iPtr->numLevels--;
if (code != TCL_OK) {
goto error;
}
for (i = 0; i < objectsUsed; i++) {
Tcl_DecrRefCount(objv[i]);
}
objectsUsed = 0;
if (objvSpace != staticObjArray) {
ckfree((char *) objvSpace);
objvSpace = staticObjArray;
}
/*
* Free expand separately since objvSpace could have been
* reallocated above.
*/
if (expand != expandStatic) {
ckfree((char *) expand);
expand = expandStatic;
}
}
/*
* Advance to the next command in the script.
*/
next = parse.commandStart + parse.commandSize;
bytesLeft -= next - p;
p = next;
Tcl_FreeParse(&parse);
gotParse = 0;
} while (bytesLeft > 0);
iPtr->varFramePtr = savedVarFramePtr;
return TCL_OK;
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 = parse.commandSize;
if (parse.term == parse.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, parse.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(&parse);
}
if (objvSpace != staticObjArray) {
ckfree((char *) objvSpace);
}
if (expand != expandStatic) {
ckfree((char *) expand);
}
iPtr->varFramePtr = savedVarFramePtr;
return code;
}
/*
*----------------------------------------------------------------------
*
* Tcl_Eval --
*
* Execute a Tcl command in a string. This procedure 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 procedure 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(interp, script)
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(interp, objPtr)
Tcl_Interp * interp;
Tcl_Obj * objPtr;
{
return Tcl_EvalObjEx(interp, objPtr, 0);
}
#undef Tcl_GlobalEvalObj
int
Tcl_GlobalEvalObj(interp, objPtr)
Tcl_Interp * interp;
Tcl_Obj * objPtr;
{
return Tcl_EvalObjEx(interp, objPtr, TCL_EVAL_GLOBAL);
}
/*
*----------------------------------------------------------------------
*
* Tcl_EvalObjEx --
*
* 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.
*
*----------------------------------------------------------------------
*/
int
Tcl_EvalObjEx(interp, objPtr, flags)
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. */
{
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.
*/
if ((objPtr->typePtr == &tclListType) && /* is a list... */
(objPtr->bytes == NULL) /* ...without a string rep */) {
List *listRepPtr;
/*
* Increase the reference count of the List structure, to avoid a
* segfault if objPtr loses its List internal rep [Bug 1119369]
*/
listRepPtr = (List *) objPtr->internalRep.twoPtrValue.ptr1;
listRepPtr->refCount++;
result = Tcl_EvalObjv(interp, listRepPtr->elemCount,
&listRepPtr->elements, flags);
/*
* If we are the last users of listRepPtr, free it.
*/
if (--listRepPtr->refCount <= 0) {
int i, elemCount = listRepPtr->elemCount;
Tcl_Obj **elements = &listRepPtr->elements;
for (i=0; i<elemCount; i++) {
Tcl_DecrRefCount(elements[i]);
}
ckfree((char *) listRepPtr);
}
} else {
script = Tcl_GetStringFromObj(objPtr, &numSrcBytes);
result = Tcl_EvalEx(interp, script, numSrcBytes, flags);
}
} else {
/*
* Let the compiler/engine subsystem do the evaluation.
*/
savedVarFramePtr = iPtr->varFramePtr;
if (flags & TCL_EVAL_GLOBAL) {
iPtr->varFramePtr = NULL;
}
result = TclCompEvalObj(interp, objPtr);
/*
* 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;
}
TclDecrRefCount(objPtr);
return result;
}
/*
*----------------------------------------------------------------------
*
* ProcessUnexpectedResult --
*
* Procedure 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(interp, returnCode)
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", (char *) NULL);
} else if (returnCode == TCL_CONTINUE) {
Tcl_AppendResult(interp,
"invoked \"continue\" outside of a loop", (char *) NULL);
} else {
char buf[30 + TCL_INTEGER_SPACE];
sprintf(buf, "command returned bad code: %d", returnCode);
Tcl_SetResult(interp, buf, TCL_VOLATILE);
}
}
/*
*---------------------------------------------------------------------------
*
* Tcl_ExprLong, Tcl_ExprDouble, Tcl_ExprBoolean --
*
* Procedures to evaluate an expression and return its value in a
* particular form.
*
* Results:
* Each of the procedures 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(interp, exprstring, ptr)
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(interp, exprstring, ptr)
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(interp, exprstring, ptr)
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 --
*
* Procedures to evaluate an expression in an object and return its
* value in a particular form.
*
* Results:
* Each of the procedures 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(interp, objPtr, ptr)
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;
double d;
result = Tcl_ExprObj(interp, objPtr, &resultPtr);
if (result != TCL_OK) {
return TCL_ERROR;
}
/* TODO - This could use a Tcl_GetNumberFromObj */
if (Tcl_GetDoubleFromObj(interp, resultPtr, &d) != TCL_OK) {
result = TCL_ERROR;
} else if (resultPtr->typePtr == &tclDoubleType) {
if (d < -(double) ULONG_MAX || d > (double) ULONG_MAX ) {
Tcl_SetResult(interp, "integer value too large to represent",
TCL_STATIC);
result = TCL_ERROR;
} else if (d >= 0) {
*ptr = (long)(unsigned long)d;
} else {
*ptr = -(long)(unsigned long)-d;
}
} else {
result = Tcl_GetLongFromObj(interp, resultPtr, ptr);
}
Tcl_DecrRefCount(resultPtr); /* discard the result object */
return result;
}
int
Tcl_ExprDoubleObj(interp, objPtr, ptr)
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;
result = Tcl_ExprObj(interp, objPtr, &resultPtr);
if (result == TCL_OK) {
#ifndef ACCEPT_NAN
result = Tcl_GetDoubleFromObj( interp, resultPtr, ptr );
#else
result = Tcl_GetDoubleFromObj( NULL, resultPtr, ptr );
if (result != TCL_OK) {
if (resultPtr->typePtr == &tclDoubleType) {
*ptr = resultPtr->internalRep.doubleValue;
result = TCL_OK;
} else {
Tcl_GetDoubleFromObj( interp, resultPtr, ptr );
}
}
#endif
Tcl_DecrRefCount(resultPtr); /* discard the result object */
}
return result;
}
int
Tcl_ExprBooleanObj(interp, objPtr, ptr)
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(interp, objc, objv, nsPtr, flags)
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, /*isProcCallFrame*/ 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(interp, objc, objv, flags)
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 == (Tcl_Interp *) NULL) {
return TCL_ERROR;
}
if ((objc < 1) || (objv == (Tcl_Obj **) NULL)) {
Tcl_AppendResult(interp, "illegal argument vector", (char *) 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 = Tcl_GetString(objv[0]);
hTblPtr = iPtr->hiddenCmdTablePtr;
if (hTblPtr != NULL) {
hPtr = Tcl_FindHashEntry(hTblPtr, cmdName);
}
if (hPtr == NULL) {
Tcl_AppendResult(interp, "invalid hidden command name \"",
cmdName, "\"", (char *) NULL);
return TCL_ERROR;
}
cmdPtr = (Command *) Tcl_GetHashValue(hPtr);
/* Invoke the command procedure. */
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(interp, expr)
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;
}
/*
*----------------------------------------------------------------------
*
* TclAppendObjToErrorInfo --
*
* 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
TclAppendObjToErrorInfo(interp, objPtr)
Tcl_Interp *interp; /* Interpreter to which error information
* pertains. */
Tcl_Obj *objPtr; /* Message to record. */
{
int length;
CONST char *message = Tcl_GetStringFromObj(objPtr, &length);
Tcl_AddObjErrorInfo(interp, message, length);
}
/*
*----------------------------------------------------------------------
*
* 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(interp, message)
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(interp, message, length)
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.
*/
if (iPtr->errorInfo == NULL) { /* just starting to log error */
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(interp, argList)
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.
*
*----------------------------------------------------------------------
*/
/* VARARGS2 */ /* ARGSUSED */
int
Tcl_VarEval TCL_VARARGS_DEF(Tcl_Interp *,arg1)
{
Tcl_Interp *interp;
va_list argList;
int result;
interp = TCL_VARARGS_START(Tcl_Interp *,arg1,argList);
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
* procedures active), just as if an "uplevel #0" command were
* being executed.
*
---------------------------------------------------------------------------
*/
int
Tcl_GlobalEval(interp, command)
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 = NULL;
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(interp, depth)
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(interp)
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(majorV, minorV, patchLevelV, type)
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 procedures that implement all of the
* built-in math functions for expressions.
*
* Results:
* Each procedure returns TCL_OK if it succeeds and pushes an
* Tcl object holding the result. If it fails it returns TCL_ERROR
* and leaves an error message in the interpreter's result.
*
* Side effects:
* None.
*
*----------------------------------------------------------------------
*/
static int
ExprCeilFunc(clientData, interp, objc, objv)
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, interp, objc, objv)
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
ExprSqrtFunc(clientData, interp, objc, objv)
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, interp, objc, objv)
ClientData clientData; /* Contains the address of a procedure 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) _ANSI_ARGS_((double)) =
(double (*)_ANSI_ARGS_((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(interp, dResult)
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, interp, objc, objv)
ClientData clientData; /* Contains the address of a procedure 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) _ANSI_ARGS_((double, double)) =
(double (*)_ANSI_ARGS_((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, interp, objc, objv)
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;
mp_int big;
Tcl_Obj *valuePtr = objv[1];
if (objc != 2) {
MathFuncWrongNumArgs(interp, 2, objc, objv);
return TCL_ERROR;
}
/* TODO - an Tcl_GetNumberFromObj call might be more useful ? */
if (Tcl_GetDoubleFromObj(NULL, valuePtr, &d) == TCL_ERROR) {
#ifdef ACCEPT_NAN
if (valuePtr->typePtr == &tclDoubleType) {
Tcl_SetObjResult(interp, valuePtr);
return TCL_OK;
}
#endif
/* TODO - decide what the right error message, etc. */
Tcl_SetObjResult(interp, Tcl_NewStringObj("non-numeric argument", -1));
return TCL_ERROR;
}
if (d >= 0.0) {
/* Non-negative values are their own absolute value */
Tcl_SetObjResult(interp, valuePtr);
return TCL_OK;
}
/*
* To take the absolute value of a negative value, take care to
* keep the same data type, fixed vs. floating point, and to
* promote to wider type if needed.
*
* TODO: efficient use of narrower ints.
*/
if (Tcl_GetBignumFromObj(NULL, valuePtr, &big) == TCL_OK) {
big.sign = MP_ZPOS;
Tcl_SetObjResult(interp, Tcl_NewBignumObj(&big));
} else {
Tcl_SetObjResult(interp, Tcl_NewDoubleObj(-d));
}
return TCL_OK;
}
static int
ExprBoolFunc(clientData, interp, objc, objv)
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, interp, objc, objv)
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 0
Tcl_Obj* valuePtr;
Tcl_Obj* oResult;
/*
* Check parameter type
*/
if (objc != 2) {
MathFuncWrongNumArgs(interp, 2, objc, objv);
} else {
valuePtr = objv[1];
if (VerifyExprObjType(interp, valuePtr) == TCL_OK) {
GET_DOUBLE_VALUE(dResult, valuePtr, valuePtr->typePtr);
TclNewDoubleObj(oResult, dResult);
Tcl_SetObjResult(interp, oResult);
return TCL_OK;
}
}
return TCL_ERROR;
#else
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;
#endif
}
static int
ExprEntierFunc(clientData, interp, objc, objv)
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;
mp_int big;
if (objc != 2) {
MathFuncWrongNumArgs(interp, 2, objc, objv);
return TCL_ERROR;
}
if (Tcl_GetBignumFromObj(NULL, objv[1], &big) == TCL_OK) {
mp_clear(&big);
Tcl_SetObjResult(interp, objv[1]);
return TCL_OK;
}
if (Tcl_GetDoubleFromObj(interp, objv[1], &d) != TCL_OK) {
/* Non-numeric argument */
return TCL_ERROR;
}
if (TclInitBignumFromDouble(interp, d, &big) != TCL_OK) {
return TCL_ERROR;
}
Tcl_SetObjResult(interp, Tcl_NewBignumObj(&big));
return TCL_OK;
}
static int
ExprIntFunc(clientData, interp, objc, objv)
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 0
register Tcl_Obj *valuePtr;
Tcl_Obj* oResult;
if (objc != 2) {
MathFuncWrongNumArgs(interp, 2, objc, objv);
} else {
valuePtr = objv[1];
if (VerifyExprObjType(interp, valuePtr) == TCL_OK) {
if (valuePtr->typePtr == &tclIntType) {
iResult = valuePtr->internalRep.longValue;
} else if (valuePtr->typePtr == &tclWideIntType) {
TclGetLongFromWide(iResult,valuePtr);
} else {
d = valuePtr->internalRep.doubleValue;
if (d < 0.0) {
if (d < (double) (long) LONG_MIN) {
tooLarge:
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"integer value too large to represent", -1));
Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
"integer value too large to represent",
(char *) NULL);
return TCL_ERROR;
}
} else if (d > (double) LONG_MAX) {
goto tooLarge;
}
if (IS_NAN(d) || IS_INF(d)) {
TclExprFloatError(interp, d);
return TCL_ERROR;
}
iResult = (long) d;
}
TclNewIntObj(oResult, iResult);
Tcl_SetObjResult(interp, oResult);
return TCL_OK;
}
}
return TCL_ERROR;
#else
if (ExprEntierFunc(NULL, interp, objc, objv) != TCL_OK) {
return TCL_ERROR;
}
objPtr = Tcl_GetObjResult(interp);
if (Tcl_GetLongFromObj(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);
Tcl_GetLongFromObj(NULL, objPtr, &iResult);
Tcl_DecrRefCount(objPtr);
}
Tcl_SetObjResult(interp, Tcl_NewLongObj(iResult));
return TCL_OK;
#endif
}
static int
ExprWideFunc(clientData, interp, objc, objv)
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 0
register Tcl_Obj *valuePtr;
Tcl_Obj* oResult;
if (objc != 2) {
MathFuncWrongNumArgs(interp, 2, objc, objv);
} else {
valuePtr = objv[1];
if (VerifyExprObjType(interp, valuePtr) == TCL_OK) {
if (valuePtr->typePtr == &tclIntType) {
wResult = valuePtr->internalRep.longValue;
} else if (valuePtr->typePtr == &tclWideIntType) {
wResult = valuePtr->internalRep.wideValue;
} else {
d = valuePtr->internalRep.doubleValue;
if (d < 0.0) {
if (d < Tcl_WideAsDouble(LLONG_MIN)) {
tooLarge:
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"integer value too large to represent", -1));
Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
"integer value too large to represent",
(char *) NULL);
return TCL_ERROR;
}
} else if (d > Tcl_WideAsDouble(LLONG_MAX)) {
goto tooLarge;
}
if (IS_NAN(d) || IS_INF(d)) {
TclExprFloatError(interp, d);
return TCL_ERROR;
}
wResult = (Tcl_WideInt) d;
}
TclNewWideIntObj(oResult, wResult);
Tcl_SetObjResult(interp, oResult);
return TCL_OK;
}
}
return TCL_ERROR;
#else
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;
#endif
}
static int
ExprRandFunc(clientData, interp, objc, objv)
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, interp, objc, objv)
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 */
{
Tcl_Obj *valuePtr;
double d, fractPart, intPart;
mp_int big;
#if 0
double i, f;
Tcl_Obj *resPtr;
#endif
/* Check the argument count. */
if (objc != 2) {
MathFuncWrongNumArgs(interp, 1, objc, objv);
return TCL_ERROR;
}
valuePtr = objv[1];
/* Coerce the argument to a number. Integers are already rounded. */
#if 0
if (VerifyExprObjType(interp, valuePtr) != TCL_OK) {
return TCL_ERROR;
}
if ((valuePtr->typePtr == &tclIntType) ||
(valuePtr->typePtr == &tclWideIntType)) {
Tcl_SetObjResult(interp, valuePtr);
return TCL_OK;
}
GET_DOUBLE_VALUE(d, valuePtr, valuePtr->typePtr);
/*
* Round the number to the nearest integer. I'd like to use round(),
* but it's C99 (or BSD), and not yet universal.
*/
d = valuePtr->internalRep.doubleValue;
f = modf(d, &i);
if (d < 0.0) {
if (f <= -0.5) {
i += -1.0;
}
if (i <= Tcl_WideAsDouble(LLONG_MIN)) {
goto tooLarge;
} else if (d <= (double) LONG_MIN) {
resPtr = Tcl_NewWideIntObj(Tcl_DoubleAsWide(i));
} else {
resPtr = Tcl_NewLongObj((long) i);
}
} else {
if (f >= 0.5) {
i += 1.0;
}
if (i >= Tcl_WideAsDouble(LLONG_MAX)) {
goto tooLarge;
} else if (i >= (double) LONG_MAX) {
resPtr = Tcl_NewWideIntObj(Tcl_DoubleAsWide(i));
} else {
resPtr = Tcl_NewLongObj((long) i);
}
}
Tcl_SetObjResult(interp, resPtr);
return TCL_OK;
/*
* Error return: result cannot be represented as an integer.
*/
tooLarge:
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"integer value too large to represent", -1));
Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
"integer value too large to represent", (char *) NULL);
return TCL_ERROR;
#else
if (Tcl_GetDoubleFromObj(interp, valuePtr, &d) != TCL_OK) {
/* Non-numeric */
return TCL_ERROR;
}
if (Tcl_GetBignumFromObj(NULL, valuePtr, &big) == TCL_OK) {
/* Integers are already rounded */
mp_clear(&big);
Tcl_SetObjResult(interp, valuePtr);
return TCL_OK;
}
fractPart = modf(d, &intPart);
if (fractPart == 0.0) {
if (TclInitBignumFromDouble(interp, d, &big) != TCL_OK) {
return TCL_ERROR;
}
} else {
if (TclInitBignumFromDouble(interp, intPart, &big) != TCL_OK) {
return TCL_ERROR;
}
if (fractPart < 0.0) {
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;
#endif
}
static int
ExprSrandFunc(clientData, interp, objc, objv)
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;
Tcl_Obj *valuePtr;
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;
}
valuePtr = objv[1];
/* TODO: error message reform? */
#if 0
if (VerifyExprObjType(interp, valuePtr) != TCL_OK) {
return TCL_ERROR;
}
#endif
if (Tcl_GetLongFromObj(interp, valuePtr, &i) != TCL_OK) {
/*
* At this point, the only other possible type is double
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"can't use floating-point value as argument to srand", -1));
*/
return TCL_ERROR;
}
/*
* 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);
}
#if 0
/*
*----------------------------------------------------------------------
*
* VerifyExprObjType --
*
* This procedure is called by the math functions to verify that
* the object is either an int or double, coercing it if necessary.
* If an error occurs during conversion, an error message is left
* in the interpreter's result unless "interp" is NULL.
*
* Results:
* TCL_OK if it was int or double, TCL_ERROR otherwise
*
* Side effects:
* objPtr is ensured to be of tclIntType, tclWideIntType or
* tclDoubleType.
*
*----------------------------------------------------------------------
*/
static int
VerifyExprObjType(interp, objPtr)
Tcl_Interp *interp; /* The interpreter in which to execute the
* function. */
Tcl_Obj *objPtr; /* Points to the object to type check. */
{
if (IS_NUMERIC_TYPE(objPtr->typePtr)) {
return TCL_OK;
} else {
int length, result = TCL_OK;
char *s = Tcl_GetStringFromObj(objPtr, &length);
if (TclLooksLikeInt(s, length)) {
long i; /* Set but never used, needed in GET_WIDE_OR_INT */
Tcl_WideInt w;
GET_WIDE_OR_INT(result, objPtr, i, w);
} else {
double d;
result = Tcl_GetDoubleFromObj((Tcl_Interp *) NULL, objPtr, &d);
}
if ((result != TCL_OK) && (interp != NULL)) {
if (TclCheckBadOctal((Tcl_Interp *) NULL, s)) {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"argument to math function was an invalid octal number",
-1));
} else {
Tcl_SetObjResult(interp, Tcl_NewStringObj(
"argument to math function didn't have numeric value",
-1));
}
}
return result;
}
}
#endif
/*
*----------------------------------------------------------------------
*
* 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(interp, expected, found, objv)
Tcl_Interp* interp; /* Tcl interpreter */
int expected; /* Formal parameter count */
int found; /* Actual parameter count */
Tcl_Obj *CONST *objv; /* Actual parameter vector */
{
Tcl_Obj* errorMessage;
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;
}
}
errorMessage = Tcl_NewStringObj("too ", -1);
if (found < expected) {
Tcl_AppendToObj(errorMessage, "few", -1);
} else {
Tcl_AppendToObj(errorMessage, "many", -1);
}
Tcl_AppendToObj(errorMessage, " arguments for math function \"", -1);
Tcl_AppendToObj(errorMessage, name, -1);
Tcl_AppendToObj(errorMessage, "\"", -1);
Tcl_SetObjResult(interp, errorMessage);
}
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