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[/] [or1k/] [trunk/] [insight/] [tcl/] [generic/] [tclCmdIL.c] - Rev 578
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/* * tclCmdIL.c -- * * This file contains the top-level command routines for most of * the Tcl built-in commands whose names begin with the letters * I through L. It contains only commands in the generic core * (i.e. those that don't depend much upon UNIX facilities). * * Copyright (c) 1987-1993 The Regents of the University of California. * Copyright (c) 1993-1997 Lucent Technologies. * Copyright (c) 1994-1997 Sun Microsystems, Inc. * Copyright (c) 1998 by Scriptics Corporation. * * See the file "license.terms" for information on usage and redistribution * of this file, and for a DISCLAIMER OF ALL WARRANTIES. * * RCS: @(#) $Id: tclCmdIL.c,v 1.1.1.1 2002-01-16 10:25:25 markom Exp $ */ #include "tclInt.h" #include "tclPort.h" #include "tclCompile.h" /* * During execution of the "lsort" command, structures of the following * type are used to arrange the objects being sorted into a collection * of linked lists. */ typedef struct SortElement { Tcl_Obj *objPtr; /* Object being sorted. */ struct SortElement *nextPtr; /* Next element in the list, or * NULL for end of list. */ } SortElement; /* * The "lsort" command needs to pass certain information down to the * function that compares two list elements, and the comparison function * needs to pass success or failure information back up to the top-level * "lsort" command. The following structure is used to pass this * information. */ typedef struct SortInfo { int isIncreasing; /* Nonzero means sort in increasing order. */ int sortMode; /* The sort mode. One of SORTMODE_* * values defined below */ Tcl_DString compareCmd; /* The Tcl comparison command when sortMode * is SORTMODE_COMMAND. Pre-initialized to * hold base of command.*/ int index; /* If the -index option was specified, this * holds the index of the list element * to extract for comparison. If -index * wasn't specified, this is -1. */ Tcl_Interp *interp; /* The interpreter in which the sortis * being done. */ int resultCode; /* Completion code for the lsort command. * If an error occurs during the sort this * is changed from TCL_OK to TCL_ERROR. */ } SortInfo; /* * The "sortMode" field of the SortInfo structure can take on any of the * following values. */ #define SORTMODE_ASCII 0 #define SORTMODE_INTEGER 1 #define SORTMODE_REAL 2 #define SORTMODE_COMMAND 3 #define SORTMODE_DICTIONARY 4 /* * Forward declarations for procedures defined in this file: */ static void AppendLocals _ANSI_ARGS_((Tcl_Interp *interp, Tcl_Obj *listPtr, char *pattern, int includeLinks)); static int DictionaryCompare _ANSI_ARGS_((char *left, char *right)); static int InfoArgsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoBodyCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoCmdCountCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoCommandsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoCompleteCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoDefaultCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoExistsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoGlobalsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoHostnameCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoLevelCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoLibraryCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoLoadedCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoLocalsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoNameOfExecutableCmd _ANSI_ARGS_(( ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoPatchLevelCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoProcsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoScriptCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoSharedlibCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoTclVersionCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static int InfoVarsCmd _ANSI_ARGS_((ClientData dummy, Tcl_Interp *interp, int objc, Tcl_Obj *CONST objv[])); static SortElement * MergeSort _ANSI_ARGS_((SortElement *headPt, SortInfo *infoPtr)); static SortElement * MergeLists _ANSI_ARGS_((SortElement *leftPtr, SortElement *rightPtr, SortInfo *infoPtr)); static int SortCompare _ANSI_ARGS_((Tcl_Obj *firstPtr, Tcl_Obj *second, SortInfo *infoPtr)); /* *---------------------------------------------------------------------- * * Tcl_IfCmd -- * * This procedure is invoked to process the "if" Tcl command. * See the user documentation for details on what it does. * * With the bytecode compiler, this procedure is only called when * a command name is computed at runtime, and is "if" or the name * to which "if" was renamed: e.g., "set z if; $z 1 {puts foo}" * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_IfCmd(dummy, interp, argc, argv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. */ { int i, result, value; i = 1; while (1) { /* * At this point in the loop, argv and argc refer to an expression * to test, either for the main expression or an expression * following an "elseif". The arguments after the expression must * be "then" (optional) and a script to execute if the expression is * true. */ if (i >= argc) { Tcl_AppendResult(interp, "wrong # args: no expression after \"", argv[i-1], "\" argument", (char *) NULL); return TCL_ERROR; } result = Tcl_ExprBoolean(interp, argv[i], &value); if (result != TCL_OK) { return result; } i++; if ((i < argc) && (strcmp(argv[i], "then") == 0)) { i++; } if (i >= argc) { Tcl_AppendResult(interp, "wrong # args: no script following \"", argv[i-1], "\" argument", (char *) NULL); return TCL_ERROR; } if (value) { return Tcl_Eval(interp, argv[i]); } /* * The expression evaluated to false. Skip the command, then * see if there is an "else" or "elseif" clause. */ i++; if (i >= argc) { return TCL_OK; } if ((argv[i][0] == 'e') && (strcmp(argv[i], "elseif") == 0)) { i++; continue; } break; } /* * Couldn't find a "then" or "elseif" clause to execute. Check now * for an "else" clause. We know that there's at least one more * argument when we get here. */ if (strcmp(argv[i], "else") == 0) { i++; if (i >= argc) { Tcl_AppendResult(interp, "wrong # args: no script following \"else\" argument", (char *) NULL); return TCL_ERROR; } } return Tcl_Eval(interp, argv[i]); } /* *---------------------------------------------------------------------- * * Tcl_IncrCmd -- * * This procedure is invoked to process the "incr" Tcl command. * See the user documentation for details on what it does. * * With the bytecode compiler, this procedure is only called when * a command name is computed at runtime, and is "incr" or the name * to which "incr" was renamed: e.g., "set z incr; $z i -1" * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_IncrCmd(dummy, interp, argc, argv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int argc; /* Number of arguments. */ char **argv; /* Argument strings. */ { int value; char *oldString, *result; char newString[30]; if ((argc != 2) && (argc != 3)) { Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], " varName ?increment?\"", (char *) NULL); return TCL_ERROR; } oldString = Tcl_GetVar(interp, argv[1], TCL_LEAVE_ERR_MSG); if (oldString == NULL) { return TCL_ERROR; } if (Tcl_GetInt(interp, oldString, &value) != TCL_OK) { Tcl_AddErrorInfo(interp, "\n (reading value of variable to increment)"); return TCL_ERROR; } if (argc == 2) { value += 1; } else { int increment; if (Tcl_GetInt(interp, argv[2], &increment) != TCL_OK) { Tcl_AddErrorInfo(interp, "\n (reading increment)"); return TCL_ERROR; } value += increment; } TclFormatInt(newString, value); result = Tcl_SetVar(interp, argv[1], newString, TCL_LEAVE_ERR_MSG); if (result == NULL) { return TCL_ERROR; } /* * Copy the result since the variable's value might change. */ Tcl_SetResult(interp, result, TCL_VOLATILE); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_InfoObjCmd -- * * This procedure is invoked to process the "info" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_InfoObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Arbitrary value passed to the command. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { static char *subCmds[] = { "args", "body", "cmdcount", "commands", "complete", "default", "exists", "globals", "hostname", "level", "library", "loaded", "locals", "nameofexecutable", "patchlevel", "procs", "script", "sharedlibextension", "tclversion", "vars", (char *) NULL}; enum ISubCmdIdx { IArgsIdx, IBodyIdx, ICmdCountIdx, ICommandsIdx, ICompleteIdx, IDefaultIdx, IExistsIdx, IGlobalsIdx, IHostnameIdx, ILevelIdx, ILibraryIdx, ILoadedIdx, ILocalsIdx, INameOfExecutableIdx, IPatchLevelIdx, IProcsIdx, IScriptIdx, ISharedLibExtensionIdx, ITclVersionIdx, IVarsIdx } index; int result; if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?"); return TCL_ERROR; } result = Tcl_GetIndexFromObj(interp, objv[1], subCmds, "option", 0, (int *) &index); if (result != TCL_OK) { return result; } switch (index) { case IArgsIdx: result = InfoArgsCmd(clientData, interp, objc, objv); break; case IBodyIdx: result = InfoBodyCmd(clientData, interp, objc, objv); break; case ICmdCountIdx: result = InfoCmdCountCmd(clientData, interp, objc, objv); break; case ICommandsIdx: result = InfoCommandsCmd(clientData, interp, objc, objv); break; case ICompleteIdx: result = InfoCompleteCmd(clientData, interp, objc, objv); break; case IDefaultIdx: result = InfoDefaultCmd(clientData, interp, objc, objv); break; case IExistsIdx: result = InfoExistsCmd(clientData, interp, objc, objv); break; case IGlobalsIdx: result = InfoGlobalsCmd(clientData, interp, objc, objv); break; case IHostnameIdx: result = InfoHostnameCmd(clientData, interp, objc, objv); break; case ILevelIdx: result = InfoLevelCmd(clientData, interp, objc, objv); break; case ILibraryIdx: result = InfoLibraryCmd(clientData, interp, objc, objv); break; case ILoadedIdx: result = InfoLoadedCmd(clientData, interp, objc, objv); break; case ILocalsIdx: result = InfoLocalsCmd(clientData, interp, objc, objv); break; case INameOfExecutableIdx: result = InfoNameOfExecutableCmd(clientData, interp, objc, objv); break; case IPatchLevelIdx: result = InfoPatchLevelCmd(clientData, interp, objc, objv); break; case IProcsIdx: result = InfoProcsCmd(clientData, interp, objc, objv); break; case IScriptIdx: result = InfoScriptCmd(clientData, interp, objc, objv); break; case ISharedLibExtensionIdx: result = InfoSharedlibCmd(clientData, interp, objc, objv); break; case ITclVersionIdx: result = InfoTclVersionCmd(clientData, interp, objc, objv); break; case IVarsIdx: result = InfoVarsCmd(clientData, interp, objc, objv); break; } return result; } /* *---------------------------------------------------------------------- * * InfoArgsCmd -- * * Called to implement the "info args" command that returns the * argument list for a procedure. Handles the following syntax: * * info args procName * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoArgsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { register Interp *iPtr = (Interp *) interp; char *name; Proc *procPtr; CompiledLocal *localPtr; Tcl_Obj *listObjPtr; if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "procname"); return TCL_ERROR; } name = Tcl_GetStringFromObj(objv[2], (int *) NULL); procPtr = TclFindProc(iPtr, name); if (procPtr == NULL) { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "\"", name, "\" isn't a procedure", (char *) NULL); return TCL_ERROR; } /* * Build a return list containing the arguments. */ listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); for (localPtr = procPtr->firstLocalPtr; localPtr != NULL; localPtr = localPtr->nextPtr) { if (TclIsVarArgument(localPtr)) { Tcl_ListObjAppendElement(interp, listObjPtr, Tcl_NewStringObj(localPtr->name, -1)); } } Tcl_SetObjResult(interp, listObjPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoBodyCmd -- * * Called to implement the "info body" command that returns the body * for a procedure. Handles the following syntax: * * info body procName * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoBodyCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { register Interp *iPtr = (Interp *) interp; char *name; Proc *procPtr; Tcl_Obj *bodyPtr, *resultPtr; if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "procname"); return TCL_ERROR; } name = Tcl_GetStringFromObj(objv[2], (int *) NULL); procPtr = TclFindProc(iPtr, name); if (procPtr == NULL) { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "\"", name, "\" isn't a procedure", (char *) NULL); return TCL_ERROR; } /* * we need to check if the body from this procedure had been generated * from a precompiled body. If that is the case, then the bodyPtr's * string representation is bogus, since sources are not available. * In order to make sure that later manipulations of the object do not * invalidate the internal representation, we make a copy of the string * representation and return that one, instead. */ bodyPtr = procPtr->bodyPtr; resultPtr = bodyPtr; if (bodyPtr->typePtr == &tclByteCodeType) { ByteCode *codePtr = (ByteCode *) bodyPtr->internalRep.otherValuePtr; if (codePtr->flags & TCL_BYTECODE_PRECOMPILED) { resultPtr = Tcl_NewStringObj(bodyPtr->bytes, bodyPtr->length); } } Tcl_SetObjResult(interp, resultPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoCmdCountCmd -- * * Called to implement the "info cmdcount" command that returns the * number of commands that have been executed. Handles the following * syntax: * * info cmdcount * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoCmdCountCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Interp *iPtr = (Interp *) interp; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } Tcl_SetIntObj(Tcl_GetObjResult(interp), iPtr->cmdCount); return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoCommandsCmd -- * * Called to implement the "info commands" command that returns the * list of commands in the interpreter that match an optional pattern. * The pattern, if any, consists of an optional sequence of namespace * names separated by "::" qualifiers, which is followed by a * glob-style pattern that restricts which commands are returned. * Handles the following syntax: * * info commands ?pattern? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoCommandsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *cmdName, *pattern, *simplePattern; register Tcl_HashEntry *entryPtr; Tcl_HashSearch search; Namespace *nsPtr; Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); Tcl_Obj *listPtr, *elemObjPtr; int specificNsInPattern = 0; /* Init. to avoid compiler warning. */ Tcl_Command cmd; int result; /* * Get the pattern and find the "effective namespace" in which to * list commands. */ if (objc == 2) { simplePattern = NULL; nsPtr = currNsPtr; specificNsInPattern = 0; } else if (objc == 3) { /* * From the pattern, get the effective namespace and the simple * pattern (no namespace qualifiers or ::'s) at the end. If an * error was found while parsing the pattern, return it. Otherwise, * if the namespace wasn't found, just leave nsPtr NULL: we will * return an empty list since no commands there can be found. */ Namespace *dummy1NsPtr, *dummy2NsPtr; pattern = Tcl_GetStringFromObj(objv[2], (int *) NULL); result = TclGetNamespaceForQualName(interp, pattern, (Namespace *) NULL, /*flags*/ TCL_LEAVE_ERR_MSG, &nsPtr, &dummy1NsPtr, &dummy2NsPtr, &simplePattern); if (result != TCL_OK) { return TCL_ERROR; } if (nsPtr != NULL) { /* we successfully found the pattern's ns */ specificNsInPattern = (strcmp(simplePattern, pattern) != 0); } } else { Tcl_WrongNumArgs(interp, 2, objv, "?pattern?"); return TCL_ERROR; } /* * Scan through the effective namespace's command table and create a * list with all commands that match the pattern. If a specific * namespace was requested in the pattern, qualify the command names * with the namespace name. */ listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); if (nsPtr != NULL) { entryPtr = Tcl_FirstHashEntry(&nsPtr->cmdTable, &search); while (entryPtr != NULL) { cmdName = Tcl_GetHashKey(&nsPtr->cmdTable, entryPtr); if ((simplePattern == NULL) || Tcl_StringMatch(cmdName, simplePattern)) { if (specificNsInPattern) { cmd = (Tcl_Command) Tcl_GetHashValue(entryPtr); elemObjPtr = Tcl_NewObj(); Tcl_GetCommandFullName(interp, cmd, elemObjPtr); } else { elemObjPtr = Tcl_NewStringObj(cmdName, -1); } Tcl_ListObjAppendElement(interp, listPtr, elemObjPtr); } entryPtr = Tcl_NextHashEntry(&search); } /* * If the effective namespace isn't the global :: namespace, and a * specific namespace wasn't requested in the pattern, then add in * all global :: commands that match the simple pattern. Of course, * we add in only those commands that aren't hidden by a command in * the effective namespace. */ if ((nsPtr != globalNsPtr) && !specificNsInPattern) { entryPtr = Tcl_FirstHashEntry(&globalNsPtr->cmdTable, &search); while (entryPtr != NULL) { cmdName = Tcl_GetHashKey(&globalNsPtr->cmdTable, entryPtr); if ((simplePattern == NULL) || Tcl_StringMatch(cmdName, simplePattern)) { if (Tcl_FindHashEntry(&nsPtr->cmdTable, cmdName) == NULL) { Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(cmdName, -1)); } } entryPtr = Tcl_NextHashEntry(&search); } } } Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoCompleteCmd -- * * Called to implement the "info complete" command that determines * whether a string is a complete Tcl command. Handles the following * syntax: * * info complete command * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoCompleteCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "command"); return TCL_ERROR; } if (TclObjCommandComplete(objv[2])) { Tcl_SetIntObj(Tcl_GetObjResult(interp), 1); } else { Tcl_SetIntObj(Tcl_GetObjResult(interp), 0); } return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoDefaultCmd -- * * Called to implement the "info default" command that returns the * default value for a procedure argument. Handles the following * syntax: * * info default procName arg varName * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoDefaultCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Interp *iPtr = (Interp *) interp; char *procName, *argName, *varName; Proc *procPtr; CompiledLocal *localPtr; Tcl_Obj *valueObjPtr; if (objc != 5) { Tcl_WrongNumArgs(interp, 2, objv, "procname arg varname"); return TCL_ERROR; } procName = Tcl_GetStringFromObj(objv[2], (int *) NULL); argName = Tcl_GetStringFromObj(objv[3], (int *) NULL); procPtr = TclFindProc(iPtr, procName); if (procPtr == NULL) { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "\"", procName, "\" isn't a procedure", (char *) NULL); return TCL_ERROR; } for (localPtr = procPtr->firstLocalPtr; localPtr != NULL; localPtr = localPtr->nextPtr) { if (TclIsVarArgument(localPtr) && (strcmp(argName, localPtr->name) == 0)) { if (localPtr->defValuePtr != NULL) { valueObjPtr = Tcl_ObjSetVar2(interp, objv[4], NULL, localPtr->defValuePtr, 0); if (valueObjPtr == NULL) { defStoreError: varName = Tcl_GetStringFromObj(objv[4], (int *) NULL); Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "couldn't store default value in variable \"", varName, "\"", (char *) NULL); return TCL_ERROR; } Tcl_SetIntObj(Tcl_GetObjResult(interp), 1); } else { Tcl_Obj *nullObjPtr = Tcl_NewObj(); valueObjPtr = Tcl_ObjSetVar2(interp, objv[4], NULL, nullObjPtr, 0); if (valueObjPtr == NULL) { Tcl_DecrRefCount(nullObjPtr); /* free unneeded obj */ goto defStoreError; } Tcl_SetIntObj(Tcl_GetObjResult(interp), 0); } return TCL_OK; } } Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "procedure \"", procName, "\" doesn't have an argument \"", argName, "\"", (char *) NULL); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * InfoExistsCmd -- * * Called to implement the "info exists" command that determines * whether a variable exists. Handles the following syntax: * * info exists varName * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoExistsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *varName; Var *varPtr, *arrayPtr; if (objc != 3) { Tcl_WrongNumArgs(interp, 2, objv, "varName"); return TCL_ERROR; } varName = Tcl_GetStringFromObj(objv[2], (int *) NULL); varPtr = TclLookupVar(interp, varName, (char *) NULL, TCL_PARSE_PART1, "access", /*createPart1*/ 0, /*createPart2*/ 0, &arrayPtr); if ((varPtr != NULL) && !TclIsVarUndefined(varPtr)) { Tcl_SetIntObj(Tcl_GetObjResult(interp), 1); } else { Tcl_SetIntObj(Tcl_GetObjResult(interp), 0); } return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoGlobalsCmd -- * * Called to implement the "info globals" command that returns the list * of global variables matching an optional pattern. Handles the * following syntax: * * info globals ?pattern? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoGlobalsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *varName, *pattern; Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); register Tcl_HashEntry *entryPtr; Tcl_HashSearch search; Var *varPtr; Tcl_Obj *listPtr; if (objc == 2) { pattern = NULL; } else if (objc == 3) { pattern = Tcl_GetStringFromObj(objv[2], (int *) NULL); } else { Tcl_WrongNumArgs(interp, 2, objv, "?pattern?"); return TCL_ERROR; } /* * Scan through the global :: namespace's variable table and create a * list of all global variables that match the pattern. */ listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); for (entryPtr = Tcl_FirstHashEntry(&globalNsPtr->varTable, &search); entryPtr != NULL; entryPtr = Tcl_NextHashEntry(&search)) { varPtr = (Var *) Tcl_GetHashValue(entryPtr); if (TclIsVarUndefined(varPtr)) { continue; } varName = Tcl_GetHashKey(&globalNsPtr->varTable, entryPtr); if ((pattern == NULL) || Tcl_StringMatch(varName, pattern)) { Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(varName, -1)); } } Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoHostnameCmd -- * * Called to implement the "info hostname" command that returns the * host name. Handles the following syntax: * * info hostname * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoHostnameCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *name; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } name = Tcl_GetHostName(); if (name) { Tcl_SetStringObj(Tcl_GetObjResult(interp), name, -1); return TCL_OK; } else { Tcl_SetStringObj(Tcl_GetObjResult(interp), "unable to determine name of host", -1); return TCL_ERROR; } } /* *---------------------------------------------------------------------- * * InfoLevelCmd -- * * Called to implement the "info level" command that returns * information about the call stack. Handles the following syntax: * * info level ?number? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoLevelCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Interp *iPtr = (Interp *) interp; int level; CallFrame *framePtr; Tcl_Obj *listPtr; if (objc == 2) { /* just "info level" */ if (iPtr->varFramePtr == NULL) { Tcl_SetIntObj(Tcl_GetObjResult(interp), 0); } else { Tcl_SetIntObj(Tcl_GetObjResult(interp), iPtr->varFramePtr->level); } return TCL_OK; } else if (objc == 3) { if (Tcl_GetIntFromObj(interp, objv[2], &level) != TCL_OK) { return TCL_ERROR; } if (level <= 0) { if (iPtr->varFramePtr == NULL) { levelError: Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "bad level \"", Tcl_GetStringFromObj(objv[2], (int *) NULL), "\"", (char *) NULL); return TCL_ERROR; } level += iPtr->varFramePtr->level; } for (framePtr = iPtr->varFramePtr; framePtr != NULL; framePtr = framePtr->callerVarPtr) { if (framePtr->level == level) { break; } } if (framePtr == NULL) { goto levelError; } listPtr = Tcl_NewListObj(framePtr->objc, framePtr->objv); Tcl_SetObjResult(interp, listPtr); return TCL_OK; } Tcl_WrongNumArgs(interp, 2, objv, "?number?"); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * InfoLibraryCmd -- * * Called to implement the "info library" command that returns the * library directory for the Tcl installation. Handles the following * syntax: * * info library * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoLibraryCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *libDirName; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } libDirName = Tcl_GetVar(interp, "tcl_library", TCL_GLOBAL_ONLY); if (libDirName != NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), libDirName, -1); return TCL_OK; } Tcl_SetStringObj(Tcl_GetObjResult(interp), "no library has been specified for Tcl", -1); return TCL_ERROR; } /* *---------------------------------------------------------------------- * * InfoLoadedCmd -- * * Called to implement the "info loaded" command that returns the * packages that have been loaded into an interpreter. Handles the * following syntax: * * info loaded ?interp? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoLoadedCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *interpName; int result; if ((objc != 2) && (objc != 3)) { Tcl_WrongNumArgs(interp, 2, objv, "?interp?"); return TCL_ERROR; } if (objc == 2) { /* get loaded pkgs in all interpreters */ interpName = NULL; } else { /* get pkgs just in specified interp */ interpName = Tcl_GetStringFromObj(objv[2], (int *) NULL); } result = TclGetLoadedPackages(interp, interpName); return result; } /* *---------------------------------------------------------------------- * * InfoLocalsCmd -- * * Called to implement the "info locals" command to return a list of * local variables that match an optional pattern. Handles the * following syntax: * * info locals ?pattern? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoLocalsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Interp *iPtr = (Interp *) interp; char *pattern; Tcl_Obj *listPtr; if (objc == 2) { pattern = NULL; } else if (objc == 3) { pattern = Tcl_GetStringFromObj(objv[2], (int *) NULL); } else { Tcl_WrongNumArgs(interp, 2, objv, "?pattern?"); return TCL_ERROR; } if (iPtr->varFramePtr == NULL || !iPtr->varFramePtr->isProcCallFrame) { return TCL_OK; } /* * Return a list containing names of first the compiled locals (i.e. the * ones stored in the call frame), then the variables in the local hash * table (if one exists). */ listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); AppendLocals(interp, listPtr, pattern, 0); Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * AppendLocals -- * * Append the local variables for the current frame to the * specified list object. * * Results: * None. * * Side effects: * None. * *---------------------------------------------------------------------- */ static void AppendLocals(interp, listPtr, pattern, includeLinks) Tcl_Interp *interp; /* Current interpreter. */ Tcl_Obj *listPtr; /* List object to append names to. */ char *pattern; /* Pattern to match against. */ int includeLinks; /* 1 if upvars should be included, else 0. */ { Interp *iPtr = (Interp *) interp; CompiledLocal *localPtr; Var *varPtr; int i, localVarCt; char *varName; Tcl_HashTable *localVarTablePtr; register Tcl_HashEntry *entryPtr; Tcl_HashSearch search; localPtr = iPtr->varFramePtr->procPtr->firstLocalPtr; localVarCt = iPtr->varFramePtr->numCompiledLocals; varPtr = iPtr->varFramePtr->compiledLocals; localVarTablePtr = iPtr->varFramePtr->varTablePtr; for (i = 0; i < localVarCt; i++) { /* * Skip nameless (temporary) variables and undefined variables */ if (!TclIsVarTemporary(localPtr) && !TclIsVarUndefined(varPtr)) { varName = varPtr->name; if ((pattern == NULL) || Tcl_StringMatch(varName, pattern)) { Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(varName, -1)); } } varPtr++; localPtr = localPtr->nextPtr; } if (localVarTablePtr != NULL) { for (entryPtr = Tcl_FirstHashEntry(localVarTablePtr, &search); entryPtr != NULL; entryPtr = Tcl_NextHashEntry(&search)) { varPtr = (Var *) Tcl_GetHashValue(entryPtr); if (!TclIsVarUndefined(varPtr) && (includeLinks || !TclIsVarLink(varPtr))) { varName = Tcl_GetHashKey(localVarTablePtr, entryPtr); if ((pattern == NULL) || Tcl_StringMatch(varName, pattern)) { Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(varName, -1)); } } } } } /* *---------------------------------------------------------------------- * * InfoNameOfExecutableCmd -- * * Called to implement the "info nameofexecutable" command that returns * the name of the binary file running this application. Handles the * following syntax: * * info nameofexecutable * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoNameOfExecutableCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { CONST char *nameOfExecutable; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } nameOfExecutable = Tcl_GetNameOfExecutable(); if (nameOfExecutable != NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), (char *)nameOfExecutable, -1); } return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoPatchLevelCmd -- * * Called to implement the "info patchlevel" command that returns the * default value for an argument to a procedure. Handles the following * syntax: * * info patchlevel * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoPatchLevelCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *patchlevel; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } patchlevel = Tcl_GetVar(interp, "tcl_patchLevel", (TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG)); if (patchlevel != NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), patchlevel, -1); return TCL_OK; } return TCL_ERROR; } /* *---------------------------------------------------------------------- * * InfoProcsCmd -- * * Called to implement the "info procs" command that returns the * procedures in the current namespace that match an optional pattern. * Handles the following syntax: * * info procs ?pattern? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoProcsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *cmdName, *pattern; Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); register Tcl_HashEntry *entryPtr; Tcl_HashSearch search; Command *cmdPtr; Tcl_Obj *listPtr; if (objc == 2) { pattern = NULL; } else if (objc == 3) { pattern = Tcl_GetStringFromObj(objv[2], (int *) NULL); } else { Tcl_WrongNumArgs(interp, 2, objv, "?pattern?"); return TCL_ERROR; } /* * Scan through the current namespace's command table and return a list * of all procs that match the pattern. */ listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); for (entryPtr = Tcl_FirstHashEntry(&currNsPtr->cmdTable, &search); entryPtr != NULL; entryPtr = Tcl_NextHashEntry(&search)) { cmdName = Tcl_GetHashKey(&currNsPtr->cmdTable, entryPtr); cmdPtr = (Command *) Tcl_GetHashValue(entryPtr); if (TclIsProc(cmdPtr)) { if ((pattern == NULL) || Tcl_StringMatch(cmdName, pattern)) { Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(cmdName, -1)); } } } Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoScriptCmd -- * * Called to implement the "info script" command that returns the * script file that is currently being evaluated. Handles the * following syntax: * * info script * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoScriptCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Interp *iPtr = (Interp *) interp; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } if (iPtr->scriptFile != NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), iPtr->scriptFile, -1); } return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoSharedlibCmd -- * * Called to implement the "info sharedlibextension" command that * returns the file extension used for shared libraries. Handles the * following syntax: * * info sharedlibextension * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoSharedlibCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } #ifdef TCL_SHLIB_EXT Tcl_SetStringObj(Tcl_GetObjResult(interp), TCL_SHLIB_EXT, -1); #endif return TCL_OK; } /* *---------------------------------------------------------------------- * * InfoTclVersionCmd -- * * Called to implement the "info tclversion" command that returns the * version number for this Tcl library. Handles the following syntax: * * info tclversion * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoTclVersionCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { char *version; if (objc != 2) { Tcl_WrongNumArgs(interp, 2, objv, NULL); return TCL_ERROR; } version = Tcl_GetVar(interp, "tcl_version", (TCL_GLOBAL_ONLY | TCL_LEAVE_ERR_MSG)); if (version != NULL) { Tcl_SetStringObj(Tcl_GetObjResult(interp), version, -1); return TCL_OK; } return TCL_ERROR; } /* *---------------------------------------------------------------------- * * InfoVarsCmd -- * * Called to implement the "info vars" command that returns the * list of variables in the interpreter that match an optional pattern. * The pattern, if any, consists of an optional sequence of namespace * names separated by "::" qualifiers, which is followed by a * glob-style pattern that restricts which variables are returned. * Handles the following syntax: * * info vars ?pattern? * * Results: * Returns TCL_OK is successful and TCL_ERROR is there is an error. * * Side effects: * Returns a result in the interpreter's result object. If there is * an error, the result is an error message. * *---------------------------------------------------------------------- */ static int InfoVarsCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Interp *iPtr = (Interp *) interp; char *varName, *pattern, *simplePattern; register Tcl_HashEntry *entryPtr; Tcl_HashSearch search; Var *varPtr; Namespace *nsPtr; Namespace *globalNsPtr = (Namespace *) Tcl_GetGlobalNamespace(interp); Namespace *currNsPtr = (Namespace *) Tcl_GetCurrentNamespace(interp); Tcl_Obj *listPtr, *elemObjPtr; int specificNsInPattern = 0; /* Init. to avoid compiler warning. */ int result; /* * Get the pattern and find the "effective namespace" in which to * list variables. We only use this effective namespace if there's * no active Tcl procedure frame. */ if (objc == 2) { simplePattern = NULL; nsPtr = currNsPtr; specificNsInPattern = 0; } else if (objc == 3) { /* * From the pattern, get the effective namespace and the simple * pattern (no namespace qualifiers or ::'s) at the end. If an * error was found while parsing the pattern, return it. Otherwise, * if the namespace wasn't found, just leave nsPtr NULL: we will * return an empty list since no variables there can be found. */ Namespace *dummy1NsPtr, *dummy2NsPtr; pattern = Tcl_GetStringFromObj(objv[2], (int *) NULL); result = TclGetNamespaceForQualName(interp, pattern, (Namespace *) NULL, /*flags*/ TCL_LEAVE_ERR_MSG, &nsPtr, &dummy1NsPtr, &dummy2NsPtr, &simplePattern); if (result != TCL_OK) { return TCL_ERROR; } if (nsPtr != NULL) { /* we successfully found the pattern's ns */ specificNsInPattern = (strcmp(simplePattern, pattern) != 0); } } else { Tcl_WrongNumArgs(interp, 2, objv, "?pattern?"); return TCL_ERROR; } /* * If the namespace specified in the pattern wasn't found, just return. */ if (nsPtr == NULL) { return TCL_OK; } listPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL); if ((iPtr->varFramePtr == NULL) || !iPtr->varFramePtr->isProcCallFrame || specificNsInPattern) { /* * There is no frame pointer, the frame pointer was pushed only * to activate a namespace, or we are in a procedure call frame * but a specific namespace was specified. Create a list containing * only the variables in the effective namespace's variable table. */ entryPtr = Tcl_FirstHashEntry(&nsPtr->varTable, &search); while (entryPtr != NULL) { varPtr = (Var *) Tcl_GetHashValue(entryPtr); if (!TclIsVarUndefined(varPtr) || (varPtr->flags & VAR_NAMESPACE_VAR)) { varName = Tcl_GetHashKey(&nsPtr->varTable, entryPtr); if ((simplePattern == NULL) || Tcl_StringMatch(varName, simplePattern)) { if (specificNsInPattern) { elemObjPtr = Tcl_NewObj(); Tcl_GetVariableFullName(interp, (Tcl_Var) varPtr, elemObjPtr); } else { elemObjPtr = Tcl_NewStringObj(varName, -1); } Tcl_ListObjAppendElement(interp, listPtr, elemObjPtr); } } entryPtr = Tcl_NextHashEntry(&search); } /* * If the effective namespace isn't the global :: namespace, and a * specific namespace wasn't requested in the pattern (i.e., the * pattern only specifies variable names), then add in all global :: * variables that match the simple pattern. Of course, add in only * those variables that aren't hidden by a variable in the effective * namespace. */ if ((nsPtr != globalNsPtr) && !specificNsInPattern) { entryPtr = Tcl_FirstHashEntry(&globalNsPtr->varTable, &search); while (entryPtr != NULL) { varPtr = (Var *) Tcl_GetHashValue(entryPtr); if (!TclIsVarUndefined(varPtr) || (varPtr->flags & VAR_NAMESPACE_VAR)) { varName = Tcl_GetHashKey(&globalNsPtr->varTable, entryPtr); if ((simplePattern == NULL) || Tcl_StringMatch(varName, simplePattern)) { if (Tcl_FindHashEntry(&nsPtr->varTable, varName) == NULL) { Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewStringObj(varName, -1)); } } } entryPtr = Tcl_NextHashEntry(&search); } } } else { AppendLocals(interp, listPtr, simplePattern, 1); } Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_JoinObjCmd -- * * This procedure is invoked to process the "join" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl object result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_JoinObjCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* The argument objects. */ { char *joinString, *bytes; int joinLength, listLen, length, i, result; Tcl_Obj **elemPtrs; Tcl_Obj *resObjPtr; if (objc == 2) { joinString = " "; joinLength = 1; } else if (objc == 3) { joinString = Tcl_GetStringFromObj(objv[2], &joinLength); } else { Tcl_WrongNumArgs(interp, 1, objv, "list ?joinString?"); return TCL_ERROR; } /* * Make sure the list argument is a list object and get its length and * a pointer to its array of element pointers. */ result = Tcl_ListObjGetElements(interp, objv[1], &listLen, &elemPtrs); if (result != TCL_OK) { return result; } /* * Now concatenate strings to form the "joined" result. We append * directly into the interpreter's result object. */ resObjPtr = Tcl_GetObjResult(interp); for (i = 0; i < listLen; i++) { bytes = Tcl_GetStringFromObj(elemPtrs[i], &length); if (i > 0) { Tcl_AppendToObj(resObjPtr, joinString, joinLength); } Tcl_AppendToObj(resObjPtr, bytes, length); } return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LindexObjCmd -- * * This object-based procedure is invoked to process the "lindex" Tcl * command. See the user documentation for details on what it does. * * Results: * A standard Tcl object result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_LindexObjCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Tcl_Obj *listPtr; Tcl_Obj **elemPtrs; int listLen, index, result; if (objc != 3) { Tcl_WrongNumArgs(interp, 1, objv, "list index"); return TCL_ERROR; } /* * Convert the first argument to a list if necessary. */ listPtr = objv[1]; result = Tcl_ListObjGetElements(interp, listPtr, &listLen, &elemPtrs); if (result != TCL_OK) { return result; } /* * Get the index from objv[2]. */ result = TclGetIntForIndex(interp, objv[2], /*endValue*/ (listLen - 1), &index); if (result != TCL_OK) { return result; } if ((index < 0) || (index >= listLen)) { /* * The index is out of range: the result is an empty string object. */ return TCL_OK; } /* * Make sure listPtr still refers to a list object. It might have been * converted to an int above if the argument objects were shared. */ if (listPtr->typePtr != &tclListType) { result = Tcl_ListObjGetElements(interp, listPtr, &listLen, &elemPtrs); if (result != TCL_OK) { return result; } } /* * Set the interpreter's object result to the index-th list element. */ Tcl_SetObjResult(interp, elemPtrs[index]); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LinsertObjCmd -- * * This object-based procedure is invoked to process the "linsert" Tcl * command. See the user documentation for details on what it does. * * Results: * A new Tcl list object formed by inserting zero or more elements * into a list. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_LinsertObjCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ register int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { Tcl_Obj *listPtr, *resultPtr; Tcl_ObjType *typePtr; int index, isDuplicate, len, result; if (objc < 4) { Tcl_WrongNumArgs(interp, 1, objv, "list index element ?element ...?"); return TCL_ERROR; } /* * Get the index first since, if a conversion to int is needed, it * will invalidate the list's internal representation. */ result = TclGetIntForIndex(interp, objv[2], /*endValue*/ INT_MAX, &index); if (result != TCL_OK) { return result; } /* * If the list object is unshared we can modify it directly. Otherwise * we create a copy to modify: this is "copy on write". We create the * duplicate directly in the interpreter's object result. */ listPtr = objv[1]; isDuplicate = 0; if (Tcl_IsShared(listPtr)) { /* * The following code must reflect the logic in Tcl_DuplicateObj() * except that it must duplicate the list object directly into the * interpreter's result. */ Tcl_ResetResult(interp); resultPtr = Tcl_GetObjResult(interp); typePtr = listPtr->typePtr; if (listPtr->bytes == NULL) { resultPtr->bytes = NULL; } else if (listPtr->bytes != tclEmptyStringRep) { len = listPtr->length; TclInitStringRep(resultPtr, listPtr->bytes, len); } if (typePtr != NULL) { if (typePtr->dupIntRepProc == NULL) { resultPtr->internalRep = listPtr->internalRep; resultPtr->typePtr = typePtr; } else { (*typePtr->dupIntRepProc)(listPtr, resultPtr); } } listPtr = resultPtr; isDuplicate = 1; } if ((objc == 4) && (index == INT_MAX)) { /* * Special case: insert one element at the end of the list. */ result = Tcl_ListObjAppendElement(interp, listPtr, objv[3]); } else if (objc > 3) { result = Tcl_ListObjReplace(interp, listPtr, index, 0, (objc-3), &(objv[3])); } if (result != TCL_OK) { return result; } /* * Set the interpreter's object result. */ if (!isDuplicate) { Tcl_SetObjResult(interp, listPtr); } return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_ListObjCmd -- * * This procedure is invoked to process the "list" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl object result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_ListObjCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ register int objc; /* Number of arguments. */ register Tcl_Obj *CONST objv[]; /* The argument objects. */ { /* * If there are no list elements, the result is an empty object. * Otherwise modify the interpreter's result object to be a list object. */ if (objc > 1) { Tcl_SetListObj(Tcl_GetObjResult(interp), (objc-1), &(objv[1])); } return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LlengthObjCmd -- * * This object-based procedure is invoked to process the "llength" Tcl * command. See the user documentation for details on what it does. * * Results: * A standard Tcl object result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_LlengthObjCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ register Tcl_Obj *CONST objv[]; /* Argument objects. */ { int listLen, result; if (objc != 2) { Tcl_WrongNumArgs(interp, 1, objv, "list"); return TCL_ERROR; } result = Tcl_ListObjLength(interp, objv[1], &listLen); if (result != TCL_OK) { return result; } /* * Set the interpreter's object result to an integer object holding the * length. */ Tcl_SetIntObj(Tcl_GetObjResult(interp), listLen); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LrangeObjCmd -- * * This procedure is invoked to process the "lrange" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl object result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_LrangeObjCmd(notUsed, interp, objc, objv) ClientData notUsed; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ register Tcl_Obj *CONST objv[]; /* Argument objects. */ { Tcl_Obj *listPtr; Tcl_Obj **elemPtrs; int listLen, first, last, numElems, result; if (objc != 4) { Tcl_WrongNumArgs(interp, 1, objv, "list first last"); return TCL_ERROR; } /* * Make sure the list argument is a list object and get its length and * a pointer to its array of element pointers. */ listPtr = objv[1]; result = Tcl_ListObjGetElements(interp, listPtr, &listLen, &elemPtrs); if (result != TCL_OK) { return result; } /* * Get the first and last indexes. */ result = TclGetIntForIndex(interp, objv[2], /*endValue*/ (listLen - 1), &first); if (result != TCL_OK) { return result; } if (first < 0) { first = 0; } result = TclGetIntForIndex(interp, objv[3], /*endValue*/ (listLen - 1), &last); if (result != TCL_OK) { return result; } if (last >= listLen) { last = (listLen - 1); } if (first > last) { return TCL_OK; /* the result is an empty object */ } /* * Make sure listPtr still refers to a list object. It might have been * converted to an int above if the argument objects were shared. */ if (listPtr->typePtr != &tclListType) { result = Tcl_ListObjGetElements(interp, listPtr, &listLen, &elemPtrs); if (result != TCL_OK) { return result; } } /* * Extract a range of fields. We modify the interpreter's result object * to be a list object containing the specified elements. */ numElems = (last - first + 1); Tcl_SetListObj(Tcl_GetObjResult(interp), numElems, &(elemPtrs[first])); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LreplaceObjCmd -- * * This object-based procedure is invoked to process the "lreplace" * Tcl command. See the user documentation for details on what it does. * * Results: * A new Tcl list object formed by replacing zero or more elements of * a list. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ /* ARGSUSED */ int Tcl_LreplaceObjCmd(dummy, interp, objc, objv) ClientData dummy; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument objects. */ { register Tcl_Obj *listPtr; int createdNewObj, first, last, listLen, numToDelete; int firstArgLen, result; char *firstArg; if (objc < 4) { Tcl_WrongNumArgs(interp, 1, objv, "list first last ?element element ...?"); return TCL_ERROR; } /* * If the list object is unshared we can modify it directly, otherwise * we create a copy to modify: this is "copy on write". */ listPtr = objv[1]; createdNewObj = 0; if (Tcl_IsShared(listPtr)) { listPtr = Tcl_DuplicateObj(listPtr); createdNewObj = 1; } result = Tcl_ListObjLength(interp, listPtr, &listLen); if (result != TCL_OK) { errorReturn: if (createdNewObj) { Tcl_DecrRefCount(listPtr); /* free unneeded obj */ } return result; } /* * Get the first and last indexes. */ result = TclGetIntForIndex(interp, objv[2], /*endValue*/ (listLen - 1), &first); if (result != TCL_OK) { goto errorReturn; } firstArg = Tcl_GetStringFromObj(objv[2], &firstArgLen); result = TclGetIntForIndex(interp, objv[3], /*endValue*/ (listLen - 1), &last); if (result != TCL_OK) { goto errorReturn; } if (first < 0) { first = 0; } if ((first >= listLen) && (listLen > 0) && (strncmp(firstArg, "end", (unsigned) firstArgLen) != 0)) { Tcl_AppendStringsToObj(Tcl_GetObjResult(interp), "list doesn't contain element ", Tcl_GetStringFromObj(objv[2], (int *) NULL), (int *) NULL); result = TCL_ERROR; goto errorReturn; } if (last >= listLen) { last = (listLen - 1); } if (first <= last) { numToDelete = (last - first + 1); } else { numToDelete = 0; } if (objc > 4) { result = Tcl_ListObjReplace(interp, listPtr, first, numToDelete, (objc-4), &(objv[4])); } else { result = Tcl_ListObjReplace(interp, listPtr, first, numToDelete, 0, NULL); } if (result != TCL_OK) { goto errorReturn; } /* * Set the interpreter's object result. */ Tcl_SetObjResult(interp, listPtr); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LsearchObjCmd -- * * This procedure is invoked to process the "lsearch" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ int Tcl_LsearchObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument values. */ { #define EXACT 0 #define GLOB 1 #define REGEXP 2 #define DICTIONARY 3 #define NOCASE 4 char *bytes, *patternBytes; int i, match, mode, index, result, listLen, length, elemLen; Tcl_Obj **elemPtrs; static char *switches[] = {"-exact", "-glob", "-regexp", "-dictionary", "-nocase", (char *) NULL}; mode = GLOB; if (objc == 4) { if (Tcl_GetIndexFromObj(interp, objv[1], switches, "search mode", 0, &mode) != TCL_OK) { return TCL_ERROR; } } else if (objc != 3) { Tcl_WrongNumArgs(interp, 1, objv, "?mode? list pattern"); return TCL_ERROR; } /* * Make sure the list argument is a list object and get its length and * a pointer to its array of element pointers. */ result = Tcl_ListObjGetElements(interp, objv[objc-2], &listLen, &elemPtrs); if (result != TCL_OK) { return result; } patternBytes = Tcl_GetStringFromObj(objv[objc-1], &length); index = -1; for (i = 0; i < listLen; i++) { match = 0; bytes = Tcl_GetStringFromObj(elemPtrs[i], &elemLen); switch (mode) { case EXACT: if (length == elemLen) { match = (memcmp(bytes, patternBytes, (size_t) length) == 0); } break; case GLOB: /* * WARNING: will not work with data containing NULLs. */ match = Tcl_StringMatch(bytes, patternBytes); break; case REGEXP: /* * WARNING: will not work with data containing NULLs. */ match = Tcl_RegExpMatch(interp, bytes, patternBytes); if (match < 0) { return TCL_ERROR; } break; case DICTIONARY: case NOCASE: #if defined(__MSVC__) || defined(_MSC_VER) match = strnicmp (bytes, patternBytes, length) == 0; #else match = strncasecmp (bytes, patternBytes, length) == 0; #endif break; } if (match) { index = i; break; } } Tcl_SetIntObj(Tcl_GetObjResult(interp), index); return TCL_OK; } /* *---------------------------------------------------------------------- * * Tcl_LsortObjCmd -- * * This procedure is invoked to process the "lsort" Tcl command. * See the user documentation for details on what it does. * * Results: * A standard Tcl result. * * Side effects: * See the user documentation. * *---------------------------------------------------------------------- */ int Tcl_LsortObjCmd(clientData, interp, objc, objv) ClientData clientData; /* Not used. */ Tcl_Interp *interp; /* Current interpreter. */ int objc; /* Number of arguments. */ Tcl_Obj *CONST objv[]; /* Argument values. */ { int i, index, dummy; Tcl_Obj *resultPtr; int length; Tcl_Obj *cmdPtr, **listObjPtrs; SortElement *elementArray; SortElement *elementPtr; SortInfo sortInfo; /* Information about this sort that * needs to be passed to the * comparison function */ static char *switches[] = {"-ascii", "-command", "-decreasing", "-dictionary", "-increasing", "-index", "-integer", "-real", (char *) NULL}; resultPtr = Tcl_GetObjResult(interp); if (objc < 2) { Tcl_WrongNumArgs(interp, 1, objv, "?options? list"); return TCL_ERROR; } /* * Parse arguments to set up the mode for the sort. */ sortInfo.isIncreasing = 1; sortInfo.sortMode = SORTMODE_ASCII; sortInfo.index = -1; sortInfo.interp = interp; sortInfo.resultCode = TCL_OK; cmdPtr = NULL; for (i = 1; i < objc-1; i++) { if (Tcl_GetIndexFromObj(interp, objv[i], switches, "option", 0, &index) != TCL_OK) { return TCL_ERROR; } switch (index) { case 0: /* -ascii */ sortInfo.sortMode = SORTMODE_ASCII; break; case 1: /* -command */ if (i == (objc-2)) { Tcl_AppendToObj(resultPtr, "\"-command\" option must be followed by comparison command", -1); return TCL_ERROR; } sortInfo.sortMode = SORTMODE_COMMAND; cmdPtr = objv[i+1]; i++; break; case 2: /* -decreasing */ sortInfo.isIncreasing = 0; break; case 3: /* -dictionary */ sortInfo.sortMode = SORTMODE_DICTIONARY; break; case 4: /* -increasing */ sortInfo.isIncreasing = 1; break; case 5: /* -index */ if (i == (objc-2)) { Tcl_AppendToObj(resultPtr, "\"-index\" option must be followed by list index", -1); return TCL_ERROR; } if (TclGetIntForIndex(interp, objv[i+1], -2, &sortInfo.index) != TCL_OK) { return TCL_ERROR; } cmdPtr = objv[i+1]; i++; break; case 6: /* -integer */ sortInfo.sortMode = SORTMODE_INTEGER; break; case 7: /* -real */ sortInfo.sortMode = SORTMODE_REAL; break; } } if (sortInfo.sortMode == SORTMODE_COMMAND) { Tcl_DStringInit(&sortInfo.compareCmd); Tcl_DStringAppend(&sortInfo.compareCmd, Tcl_GetStringFromObj(cmdPtr, &dummy), -1); } sortInfo.resultCode = Tcl_ListObjGetElements(interp, objv[objc-1], &length, &listObjPtrs); if (sortInfo.resultCode != TCL_OK) { goto done; } if (length <= 0) { return TCL_OK; } elementArray = (SortElement *) ckalloc(length * sizeof(SortElement)); for (i=0; i < length; i++){ elementArray[i].objPtr = listObjPtrs[i]; elementArray[i].nextPtr = &elementArray[i+1]; } elementArray[length-1].nextPtr = NULL; elementPtr = MergeSort(elementArray, &sortInfo); if (sortInfo.resultCode == TCL_OK) { /* * Note: must clear the interpreter's result object: it could * have been set by the -command script. */ Tcl_ResetResult(interp); resultPtr = Tcl_GetObjResult(interp); for (; elementPtr != NULL; elementPtr = elementPtr->nextPtr){ Tcl_ListObjAppendElement(interp, resultPtr, elementPtr->objPtr); } } ckfree((char*) elementArray); done: if (sortInfo.sortMode == SORTMODE_COMMAND) { Tcl_DStringFree(&sortInfo.compareCmd); } return sortInfo.resultCode; } /* *---------------------------------------------------------------------- * * MergeSort - * * This procedure sorts a linked list of SortElement structures * use the merge-sort algorithm. * * Results: * A pointer to the head of the list after sorting is returned. * * Side effects: * None, unless a user-defined comparison command does something * weird. * *---------------------------------------------------------------------- */ static SortElement * MergeSort(headPtr, infoPtr) SortElement *headPtr; /* First element on the list */ SortInfo *infoPtr; /* Information needed by the * comparison operator */ { /* * The subList array below holds pointers to temporary lists built * during the merge sort. Element i of the array holds a list of * length 2**i. */ # define NUM_LISTS 30 SortElement *subList[NUM_LISTS]; SortElement *elementPtr; int i; for(i = 0; i < NUM_LISTS; i++){ subList[i] = NULL; } while (headPtr != NULL) { elementPtr = headPtr; headPtr = headPtr->nextPtr; elementPtr->nextPtr = 0; for (i = 0; (i < NUM_LISTS) && (subList[i] != NULL); i++){ elementPtr = MergeLists(subList[i], elementPtr, infoPtr); subList[i] = NULL; } if (i >= NUM_LISTS) { i = NUM_LISTS-1; } subList[i] = elementPtr; } elementPtr = NULL; for (i = 0; i < NUM_LISTS; i++){ elementPtr = MergeLists(subList[i], elementPtr, infoPtr); } return elementPtr; } /* *---------------------------------------------------------------------- * * MergeLists - * * This procedure combines two sorted lists of SortElement structures * into a single sorted list. * * Results: * The unified list of SortElement structures. * * Side effects: * None, unless a user-defined comparison command does something * weird. * *---------------------------------------------------------------------- */ static SortElement * MergeLists(leftPtr, rightPtr, infoPtr) SortElement *leftPtr; /* First list to be merged; may be * NULL. */ SortElement *rightPtr; /* Second list to be merged; may be * NULL. */ SortInfo *infoPtr; /* Information needed by the * comparison operator. */ { SortElement *headPtr; SortElement *tailPtr; if (leftPtr == NULL) { return rightPtr; } if (rightPtr == NULL) { return leftPtr; } if (SortCompare(leftPtr->objPtr, rightPtr->objPtr, infoPtr) > 0) { tailPtr = rightPtr; rightPtr = rightPtr->nextPtr; } else { tailPtr = leftPtr; leftPtr = leftPtr->nextPtr; } headPtr = tailPtr; while ((leftPtr != NULL) && (rightPtr != NULL)) { if (SortCompare(leftPtr->objPtr, rightPtr->objPtr, infoPtr) > 0) { tailPtr->nextPtr = rightPtr; tailPtr = rightPtr; rightPtr = rightPtr->nextPtr; } else { tailPtr->nextPtr = leftPtr; tailPtr = leftPtr; leftPtr = leftPtr->nextPtr; } } if (leftPtr != NULL) { tailPtr->nextPtr = leftPtr; } else { tailPtr->nextPtr = rightPtr; } return headPtr; } /* *---------------------------------------------------------------------- * * SortCompare -- * * This procedure is invoked by MergeLists to determine the proper * ordering between two elements. * * Results: * A negative results means the the first element comes before the * second, and a positive results means that the second element * should come first. A result of zero means the two elements * are equal and it doesn't matter which comes first. * * Side effects: * None, unless a user-defined comparison command does something * weird. * *---------------------------------------------------------------------- */ static int SortCompare(objPtr1, objPtr2, infoPtr) Tcl_Obj *objPtr1, *objPtr2; /* Values to be compared. */ SortInfo *infoPtr; /* Information passed from the * top-level "lsort" command */ { int order, dummy, listLen, index; Tcl_Obj *objPtr; char buffer[30]; order = 0; if (infoPtr->resultCode != TCL_OK) { /* * Once an error has occurred, skip any future comparisons * so as to preserve the error message in sortInterp->result. */ return order; } if (infoPtr->index != -1) { /* * The "-index" option was specified. Treat each object as a * list, extract the requested element from each list, and * compare the elements, not the lists. The special index "end" * is signaled here with a large negative index. */ if (Tcl_ListObjLength(infoPtr->interp, objPtr1, &listLen) != TCL_OK) { infoPtr->resultCode = TCL_ERROR; return order; } if (infoPtr->index < -1) { index = listLen - 1; } else { index = infoPtr->index; } if (Tcl_ListObjIndex(infoPtr->interp, objPtr1, index, &objPtr) != TCL_OK) { infoPtr->resultCode = TCL_ERROR; return order; } if (objPtr == NULL) { objPtr = objPtr1; missingElement: sprintf(buffer, "%d", infoPtr->index); Tcl_AppendStringsToObj(Tcl_GetObjResult(infoPtr->interp), "element ", buffer, " missing from sublist \"", Tcl_GetStringFromObj(objPtr, (int *) NULL), "\"", (char *) NULL); infoPtr->resultCode = TCL_ERROR; return order; } objPtr1 = objPtr; if (Tcl_ListObjLength(infoPtr->interp, objPtr2, &listLen) != TCL_OK) { infoPtr->resultCode = TCL_ERROR; return order; } if (infoPtr->index < -1) { index = listLen - 1; } else { index = infoPtr->index; } if (Tcl_ListObjIndex(infoPtr->interp, objPtr2, index, &objPtr) != TCL_OK) { infoPtr->resultCode = TCL_ERROR; return order; } if (objPtr == NULL) { objPtr = objPtr2; goto missingElement; } objPtr2 = objPtr; } if (infoPtr->sortMode == SORTMODE_ASCII) { order = strcmp(Tcl_GetStringFromObj(objPtr1, &dummy), Tcl_GetStringFromObj(objPtr2, &dummy)); } else if (infoPtr->sortMode == SORTMODE_DICTIONARY) { order = DictionaryCompare( Tcl_GetStringFromObj(objPtr1, &dummy), Tcl_GetStringFromObj(objPtr2, &dummy)); } else if (infoPtr->sortMode == SORTMODE_INTEGER) { int a, b; if ((Tcl_GetIntFromObj(infoPtr->interp, objPtr1, &a) != TCL_OK) || (Tcl_GetIntFromObj(infoPtr->interp, objPtr2, &b) != TCL_OK)) { infoPtr->resultCode = TCL_ERROR; return order; } if (a > b) { order = 1; } else if (b > a) { order = -1; } } else if (infoPtr->sortMode == SORTMODE_REAL) { double a, b; if ((Tcl_GetDoubleFromObj(infoPtr->interp, objPtr1, &a) != TCL_OK) || (Tcl_GetDoubleFromObj(infoPtr->interp, objPtr2, &b) != TCL_OK)) { infoPtr->resultCode = TCL_ERROR; return order; } if (a > b) { order = 1; } else if (b > a) { order = -1; } } else { int oldLength; /* * Generate and evaluate a command to determine which string comes * first. */ oldLength = Tcl_DStringLength(&infoPtr->compareCmd); Tcl_DStringAppendElement(&infoPtr->compareCmd, Tcl_GetStringFromObj(objPtr1, &dummy)); Tcl_DStringAppendElement(&infoPtr->compareCmd, Tcl_GetStringFromObj(objPtr2, &dummy)); infoPtr->resultCode = Tcl_Eval(infoPtr->interp, Tcl_DStringValue(&infoPtr->compareCmd)); Tcl_DStringTrunc(&infoPtr->compareCmd, oldLength); if (infoPtr->resultCode != TCL_OK) { Tcl_AddErrorInfo(infoPtr->interp, "\n (-compare command)"); return order; } /* * Parse the result of the command. */ if (Tcl_GetIntFromObj(infoPtr->interp, Tcl_GetObjResult(infoPtr->interp), &order) != TCL_OK) { Tcl_ResetResult(infoPtr->interp); Tcl_AppendToObj(Tcl_GetObjResult(infoPtr->interp), "-compare command returned non-numeric result", -1); infoPtr->resultCode = TCL_ERROR; return order; } } if (!infoPtr->isIncreasing) { order = -order; } return order; } /* *---------------------------------------------------------------------- * * DictionaryCompare * * This function compares two strings as if they were being used in * an index or card catalog. The case of alphabetic characters is * ignored, except to break ties. Thus "B" comes before "b" but * after "a". Also, integers embedded in the strings compare in * numerical order. In other words, "x10y" comes after "x9y", not * before it as it would when using strcmp(). * * Results: * A negative result means that the first element comes before the * second, and a positive result means that the second element * should come first. A result of zero means the two elements * are equal and it doesn't matter which comes first. * * Side effects: * None. * *---------------------------------------------------------------------- */ static int DictionaryCompare(left, right) char *left, *right; /* The strings to compare */ { int diff, zeros; int secondaryDiff = 0; while (1) { if (isdigit(UCHAR(*right)) && isdigit(UCHAR(*left))) { /* * There are decimal numbers embedded in the two * strings. Compare them as numbers, rather than * strings. If one number has more leading zeros than * the other, the number with more leading zeros sorts * later, but only as a secondary choice. */ zeros = 0; while ((*right == '0') && (isdigit(UCHAR(right[1])))) { right++; zeros--; } while ((*left == '0') && (isdigit(UCHAR(left[1])))) { left++; zeros++; } if (secondaryDiff == 0) { secondaryDiff = zeros; } /* * The code below compares the numbers in the two * strings without ever converting them to integers. It * does this by first comparing the lengths of the * numbers and then comparing the digit values. */ diff = 0; while (1) { if (diff == 0) { diff = UCHAR(*left) - UCHAR(*right); } right++; left++; if (!isdigit(UCHAR(*right))) { if (isdigit(UCHAR(*left))) { return 1; } else { /* * The two numbers have the same length. See * if their values are different. */ if (diff != 0) { return diff; } break; } } else if (!isdigit(UCHAR(*left))) { return -1; } } continue; } diff = UCHAR(*left) - UCHAR(*right); if (diff) { if (isupper(UCHAR(*left)) && islower(UCHAR(*right))) { diff = UCHAR(tolower(*left)) - UCHAR(*right); if (diff) { return diff; } else if (secondaryDiff == 0) { secondaryDiff = -1; } } else if (isupper(UCHAR(*right)) && islower(UCHAR(*left))) { diff = UCHAR(*left) - UCHAR(tolower(UCHAR(*right))); if (diff) { return diff; } else if (secondaryDiff == 0) { secondaryDiff = 1; } } else { return diff; } } if (*left == 0) { break; } left++; right++; } if (diff == 0) { diff = secondaryDiff; } return diff; }
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