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[/] [or1k/] [trunk/] [insight/] [tcl/] [generic/] [tclCmdAH.c] - Blame information for rev 1780

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/*
 * tclCmdAH.c --
 *
 *      This file contains the top-level command routines for most of
 *      the Tcl built-in commands whose names begin with the letters
 *      A to H.
 *
 * Copyright (c) 1987-1993 The Regents of the University of California.
 * Copyright (c) 1994-1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclCmdAH.c,v 1.1.1.1 2002-01-16 10:25:25 markom Exp $
 */
 
#include "tclInt.h"
#include "tclPort.h"
 
/*
 * Prototypes for local procedures defined in this file:
 */
 
static char *           GetTypeFromMode _ANSI_ARGS_((int mode));
static int              StoreStatData _ANSI_ARGS_((Tcl_Interp *interp,
                            char *varName, struct stat *statPtr));
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_BreakCmd --
 *
 *      This procedure is invoked to process the "break" 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 "break" or the name
 *      to which "break" was renamed: e.g., "set z break; $z"
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */
 
        /* ARGSUSED */
int
Tcl_BreakCmd(dummy, interp, argc, argv)
    ClientData dummy;                   /* Not used. */
    Tcl_Interp *interp;                 /* Current interpreter. */
    int argc;                           /* Number of arguments. */
    char **argv;                        /* Argument strings. */
{
    if (argc != 1) {
        Tcl_AppendResult(interp, "wrong # args: should be \"",
                argv[0], "\"", (char *) NULL);
        return TCL_ERROR;
    }
    return TCL_BREAK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_CaseObjCmd --
 *
 *      This procedure is invoked to process the "case" 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_CaseObjCmd(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 int i;
    int body, result;
    char *string, *arg;
    int argLen, caseObjc;
    Tcl_Obj *CONST *caseObjv;
    Tcl_Obj *armPtr;
 
    if (objc < 3) {
        Tcl_WrongNumArgs(interp, 1, objv,
                "string ?in? patList body ... ?default body?");
        return TCL_ERROR;
    }
 
    /*
     * THIS FAILS IF AN OBJECT'S STRING REP HAS A NULL BYTE.
     */
 
    string = Tcl_GetStringFromObj(objv[1], &argLen);
    body = -1;
 
    arg = Tcl_GetStringFromObj(objv[2], &argLen);
    if (strcmp(arg, "in") == 0) {
        i = 3;
    } else {
        i = 2;
    }
    caseObjc = objc - i;
    caseObjv = objv + i;
 
    /*
     * If all of the pattern/command pairs are lumped into a single
     * argument, split them out again.
     * THIS FAILS IF THE ARG'S STRING REP CONTAINS A NULL
     */
 
    if (caseObjc == 1) {
        Tcl_Obj **newObjv;
 
        Tcl_ListObjGetElements(interp, caseObjv[0], &caseObjc, &newObjv);
        caseObjv = newObjv;
    }
 
    for (i = 0;  i < caseObjc;  i += 2) {
        int patObjc, j;
        char **patObjv;
        char *pat;
        register char *p;
 
        if (i == (caseObjc-1)) {
            Tcl_ResetResult(interp);
            Tcl_AppendToObj(Tcl_GetObjResult(interp),
                    "extra case pattern with no body", -1);
            return TCL_ERROR;
        }
 
        /*
         * Check for special case of single pattern (no list) with
         * no backslash sequences.
         */
 
        pat = Tcl_GetStringFromObj(caseObjv[i], &argLen);
        for (p = pat;  *p != 0;  p++) {  /* FAILS IF NULL BYTE */
            if (isspace(UCHAR(*p)) || (*p == '\\')) {
                break;
            }
        }
        if (*p == 0) {
            if ((*pat == 'd') && (strcmp(pat, "default") == 0)) {
                body = i+1;
            }
            if (Tcl_StringMatch(string, pat)) {
                body = i+1;
                goto match;
            }
            continue;
        }
 
 
        /*
         * Break up pattern lists, then check each of the patterns
         * in the list.
         */
 
        result = Tcl_SplitList(interp, pat, &patObjc, &patObjv);
        if (result != TCL_OK) {
            return result;
        }
        for (j = 0; j < patObjc; j++) {
            if (Tcl_StringMatch(string, patObjv[j])) {
                body = i+1;
                break;
            }
        }
        ckfree((char *) patObjv);
        if (j < patObjc) {
            break;
        }
    }
 
    match:
    if (body != -1) {
        armPtr = caseObjv[body-1];
        result = Tcl_EvalObj(interp, caseObjv[body]);
        if (result == TCL_ERROR) {
            char msg[100];
 
            arg = Tcl_GetStringFromObj(armPtr, &argLen);
            sprintf(msg, "\n    (\"%.*s\" arm line %d)", argLen, arg,
                    interp->errorLine);
            Tcl_AddObjErrorInfo(interp, msg, -1);
        }
        return result;
    }
 
    /*
     * Nothing matched: return nothing.
     */
 
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_CatchObjCmd --
 *
 *      This object-based procedure is invoked to process the "catch" 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_CatchObjCmd(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 *varNamePtr = NULL;
    int result;
 
    if ((objc != 2) && (objc != 3)) {
        Tcl_WrongNumArgs(interp, 1, objv, "command ?varName?");
        return TCL_ERROR;
    }
 
    /*
     * Save a pointer to the variable name object, if any, in case the
     * Tcl_EvalObj reallocates the bytecode interpreter's evaluation
     * stack rendering objv invalid.
     */
 
    if (objc == 3) {
        varNamePtr = objv[2];
    }
 
    result = Tcl_EvalObj(interp, objv[1]);
 
    if (objc == 3) {
        if (Tcl_ObjSetVar2(interp, varNamePtr, NULL,
                    Tcl_GetObjResult(interp), TCL_PARSE_PART1) == NULL) {
            Tcl_ResetResult(interp);
            Tcl_AppendToObj(Tcl_GetObjResult(interp),
                    "couldn't save command result in variable", -1);
            return TCL_ERROR;
        }
    }
 
    /*
     * Set the interpreter's object result to an integer object holding the
     * integer Tcl_EvalObj result. Note that we don't bother generating a
     * string representation. We reset the interpreter's object result
     * to an unshared empty object and then set it to be an integer object.
     */
 
    Tcl_ResetResult(interp);
    Tcl_SetIntObj(Tcl_GetObjResult(interp), result);
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_CdObjCmd --
 *
 *      This procedure is invoked to process the "cd" 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_CdObjCmd(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 *dirName;
    int dirLength;
    Tcl_DString buffer;
    int result;
 
    if (objc > 2) {
        Tcl_WrongNumArgs(interp, 1, objv, "dirName");
        return TCL_ERROR;
    }
 
    if (objc == 2) {
        dirName = Tcl_GetStringFromObj(objv[1], &dirLength);
    } else {
        dirName = "~";
    }
    dirName = Tcl_TranslateFileName(interp, dirName, &buffer);
    if (dirName == NULL) {
        return TCL_ERROR;
    }
    result = TclChdir(interp, dirName);
    Tcl_DStringFree(&buffer);
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ConcatObjCmd --
 *
 *      This object-based procedure is invoked to process the "concat" 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_ConcatObjCmd(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_SetObjResult(interp, Tcl_ConcatObj(objc-1, objv+1));
    }
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ContinueCmd -
 *
 *      This procedure is invoked to process the "continue" 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 "continue" or the name
 *      to which "continue" was renamed: e.g., "set z continue; $z"
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */
 
        /* ARGSUSED */
int
Tcl_ContinueCmd(dummy, interp, argc, argv)
    ClientData dummy;                   /* Not used. */
    Tcl_Interp *interp;                 /* Current interpreter. */
    int argc;                           /* Number of arguments. */
    char **argv;                        /* Argument strings. */
{
    if (argc != 1) {
        Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
                "\"", (char *) NULL);
        return TCL_ERROR;
    }
    return TCL_CONTINUE;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ErrorObjCmd --
 *
 *      This procedure is invoked to process the "error" 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_ErrorObjCmd(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;
    register Tcl_Obj *namePtr;
    char *info;
    int infoLen;
 
    if ((objc < 2) || (objc > 4)) {
        Tcl_WrongNumArgs(interp, 1, objv, "message ?errorInfo? ?errorCode?");
        return TCL_ERROR;
    }
 
    if (objc >= 3) {            /* process the optional info argument */
        info = Tcl_GetStringFromObj(objv[2], &infoLen);
        if (*info != 0) {
            Tcl_AddObjErrorInfo(interp, info, infoLen);
            iPtr->flags |= ERR_ALREADY_LOGGED;
        }
    }
 
    if (objc == 4) {
        namePtr = Tcl_NewStringObj("errorCode", -1);
        Tcl_ObjSetVar2(interp, namePtr, (Tcl_Obj *) NULL, objv[3],
                TCL_GLOBAL_ONLY);
        iPtr->flags |= ERROR_CODE_SET;
        Tcl_DecrRefCount(namePtr); /* we're done with name object */
    }
 
    Tcl_SetObjResult(interp, objv[1]);
    return TCL_ERROR;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_EvalObjCmd --
 *
 *      This object-based procedure is invoked to process the "eval" 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_EvalObjCmd(dummy, interp, objc, objv)
    ClientData dummy;           /* Not used. */
    Tcl_Interp *interp;         /* Current interpreter. */
    int objc;                   /* Number of arguments. */
    Tcl_Obj *CONST objv[];      /* Argument objects. */
{
    int result;
    register Tcl_Obj *objPtr;
 
    if (objc < 2) {
        Tcl_WrongNumArgs(interp, 1, objv, "arg ?arg ...?");
        return TCL_ERROR;
    }
 
    if (objc == 2) {
        result = Tcl_EvalObj(interp, objv[1]);
    } else {
        /*
         * More than one argument: concatenate them together with spaces
         * between, then evaluate the result.
         */
 
        objPtr = Tcl_ConcatObj(objc-1, objv+1);
        result = Tcl_EvalObj(interp, objPtr);
        Tcl_DecrRefCount(objPtr);  /* we're done with the object */
    }
    if (result == TCL_ERROR) {
        char msg[60];
        sprintf(msg, "\n    (\"eval\" body line %d)", interp->errorLine);
        Tcl_AddObjErrorInfo(interp, msg, -1);
    }
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ExitObjCmd --
 *
 *      This procedure is invoked to process the "exit" 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_ExitObjCmd(dummy, interp, objc, objv)
    ClientData dummy;           /* Not used. */
    Tcl_Interp *interp;         /* Current interpreter. */
    int objc;                   /* Number of arguments. */
    Tcl_Obj *CONST objv[];      /* Argument objects. */
{
    int value;
 
    if ((objc != 1) && (objc != 2)) {
        Tcl_WrongNumArgs(interp, 1, objv, "?returnCode?");
        return TCL_ERROR;
    }
 
    if (objc == 1) {
        value = 0;
    } else if (Tcl_GetIntFromObj(interp, objv[1], &value) != TCL_OK) {
        return TCL_ERROR;
    }
    Tcl_Exit(value);
    /*NOTREACHED*/
    return TCL_OK;                      /* Better not ever reach this! */
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ExprObjCmd --
 *
 *      This object-based procedure is invoked to process the "expr" Tcl
 *      command. See the user documentation for details on what it does.
 *
 *      With the bytecode compiler, this procedure is called in two
 *      circumstances: 1) to execute expr commands that are too complicated
 *      or too unsafe to try compiling directly into an inline sequence of
 *      instructions, and 2) to execute commands where the command name is
 *      computed at runtime and is "expr" or the name to which "expr" was
 *      renamed (e.g., "set z expr; $z 2+3")
 *
 * Results:
 *      A standard Tcl object result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */
 
        /* ARGSUSED */
int
Tcl_ExprObjCmd(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 *objPtr;
    Tcl_Obj *resultPtr;
    register char *bytes;
    int length, i, result;
 
    if (objc < 2) {
        Tcl_WrongNumArgs(interp, 1, objv, "arg ?arg ...?");
        return TCL_ERROR;
    }
 
    if (objc == 2) {
        result = Tcl_ExprObj(interp, objv[1], &resultPtr);
        if (result == TCL_OK) {
            Tcl_SetObjResult(interp, resultPtr);
            Tcl_DecrRefCount(resultPtr);  /* done with the result object */
        }
        return result;
    }
 
    /*
     * Create a new object holding the concatenated argument strings.
     * THIS FAILS IF AN OBJECT'S STRING REP HAS A NULL BYTE.
     */
 
    bytes = Tcl_GetStringFromObj(objv[1], &length);
    objPtr = Tcl_NewStringObj(bytes, length);
    Tcl_IncrRefCount(objPtr);
    for (i = 2;  i < objc;  i++) {
        Tcl_AppendToObj(objPtr, " ", 1);
        bytes = Tcl_GetStringFromObj(objv[i], &length);
        Tcl_AppendToObj(objPtr, bytes, length);
    }
 
    /*
     * Evaluate the concatenated string object.
     */
 
    result = Tcl_ExprObj(interp, objPtr, &resultPtr);
    if (result == TCL_OK) {
        Tcl_SetObjResult(interp, resultPtr);
        Tcl_DecrRefCount(resultPtr);  /* done with the result object */
    }
 
    /*
     * Free allocated resources.
     */
 
    Tcl_DecrRefCount(objPtr);
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_FileObjCmd --
 *
 *      This procedure is invoked to process the "file" Tcl command.
 *      See the user documentation for details on what it does.
 *      PLEASE NOTE THAT THIS FAILS WITH FILENAMES AND PATHS WITH
 *      EMBEDDED NULLS, WHICH COULD THEORETICALLY HAPPEN ON A MAC.
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */
 
        /* ARGSUSED */
int
Tcl_FileObjCmd(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 *fileName, *extension, *errorString;
    int statOp = 0;              /* Init. to avoid compiler warning. */
    int length;
    int mode = 0;                        /* Initialized only to prevent
                                         * compiler warning message. */
    struct stat statBuf;
    Tcl_DString buffer;
    Tcl_Obj *resultPtr;
    int index, result;
 
/*
 * This list of constants should match the fileOption string array below.
 */
 
enum {FILE_ATIME, FILE_ATTRIBUTES, FILE_COPY, FILE_DELETE, FILE_DIRNAME,
        FILE_EXECUTABLE, FILE_EXISTS, FILE_EXTENSION, FILE_ISDIRECTORY,
        FILE_ISFILE, FILE_JOIN, FILE_LSTAT, FILE_MTIME, FILE_MKDIR,
        FILE_NATIVENAME, FILE_OWNED, FILE_PATHTYPE, FILE_READABLE,
        FILE_READLINK, FILE_RENAME, FILE_ROOTNAME, FILE_SIZE, FILE_SPLIT,
        FILE_STAT, FILE_TAIL, FILE_TYPE, FILE_VOLUMES, FILE_WRITABLE};
 
 
    static char *fileOptions[] = {"atime", "attributes", "copy", "delete",
            "dirname", "executable", "exists", "extension", "isdirectory",
            "isfile", "join", "lstat", "mtime", "mkdir", "nativename",
            "owned", "pathtype", "readable", "readlink", "rename",
            "rootname", "size", "split", "stat", "tail", "type", "volumes",
            "writable", (char *) NULL};
 
    if (objc < 2) {
        Tcl_WrongNumArgs(interp, 1, objv, "option ?arg ...?");
        return TCL_ERROR;
    }
 
    if (Tcl_GetIndexFromObj(interp, objv[1], fileOptions, "option", 0, &index)
            != TCL_OK) {
        return TCL_ERROR;
    }
 
    result = TCL_OK;
    /*
     * First, do the volumes command, since it is the only one that
     * has objc == 2.
     */
 
    if ( index == FILE_VOLUMES) {
        if ( objc != 2 ) {
            Tcl_WrongNumArgs(interp, 1, objv, "volumes");
            return TCL_ERROR;
        }
        result = TclpListVolumes(interp);
        return result;
    }
 
    if (objc < 3) {
        Tcl_WrongNumArgs(interp, 2, objv, "name ?arg ...?");
        return TCL_ERROR;
    }
 
    Tcl_DStringInit(&buffer);
    resultPtr = Tcl_GetObjResult(interp);
 
 
    /*
     * Handle operations on the file name.
     */
 
    switch (index) {
        case FILE_ATTRIBUTES:
            result = TclFileAttrsCmd(interp, objc - 2, objv + 2);
            goto done;
        case FILE_DIRNAME:      {
            int pargc;
            char **pargv;
 
            if (objc != 3) {
                errorString = "dirname name";
                goto not3Args;
            }
 
            fileName = Tcl_GetStringFromObj(objv[2], &length);
 
            /*
             * If there is only one element, and it starts with a tilde,
             * perform tilde substitution and resplit the path.
             */
 
            Tcl_SplitPath(fileName, &pargc, &pargv);
            if ((pargc == 1) && (*fileName == '~')) {
                ckfree((char*) pargv);
                fileName = Tcl_TranslateFileName(interp, fileName, &buffer);
                if (fileName == NULL) {
                    result = TCL_ERROR;
                    goto done;
                }
                Tcl_SplitPath(fileName, &pargc, &pargv);
                Tcl_DStringSetLength(&buffer, 0);
            }
 
            /*
             * Return all but the last component.  If there is only one
             * component, return it if the path was non-relative, otherwise
             * return the current directory.
             */
 
            if (pargc > 1) {
                Tcl_JoinPath(pargc-1, pargv, &buffer);
                Tcl_SetStringObj(resultPtr, Tcl_DStringValue(&buffer),
                        buffer.length);
            } else if ((pargc == 0)
                    || (Tcl_GetPathType(pargv[0]) == TCL_PATH_RELATIVE)) {
                Tcl_SetStringObj(resultPtr, (tclPlatform == TCL_PLATFORM_MAC)
                        ? ":" : ".", 1);
            } else {
                Tcl_SetStringObj(resultPtr, pargv[0], -1);           }
            ckfree((char *)pargv);
            goto done;
        }
        case FILE_TAIL: {
            int pargc;
            char **pargv;
 
            if (objc != 3) {
                errorString = "tail name";
                goto not3Args;
            }
 
            fileName = Tcl_GetStringFromObj(objv[2], &length);
 
            /*
             * If there is only one element, and it starts with a tilde,
             * perform tilde substitution and resplit the path.
             */
 
            Tcl_SplitPath(fileName, &pargc, &pargv);
            if ((pargc == 1) && (*fileName == '~')) {
                ckfree((char*) pargv);
                fileName = Tcl_TranslateFileName(interp, fileName, &buffer);
                if (fileName == NULL) {
                    result = TCL_ERROR;
                    goto done;
                }
                Tcl_SplitPath(fileName, &pargc, &pargv);
                Tcl_DStringSetLength(&buffer, 0);
            }
 
            /*
             * Return the last component, unless it is the only component,
             * and it is the root of an absolute path.
             */
 
            if (pargc > 0) {
                if ((pargc > 1)
                        || (Tcl_GetPathType(pargv[0]) == TCL_PATH_RELATIVE)) {
                    Tcl_SetStringObj(resultPtr, pargv[pargc - 1], -1);
                }
            }
            ckfree((char *)pargv);
            goto done;
        }
        case FILE_ROOTNAME: {
            char *fileName;
 
            if (objc != 3) {
                errorString = "rootname name";
                goto not3Args;
            }
 
            fileName = Tcl_GetStringFromObj(objv[2], &length);
            extension = TclGetExtension(fileName);
            if (extension == NULL) {
                Tcl_SetObjResult(interp, objv[2]);
            } else {
                Tcl_SetStringObj(resultPtr, fileName,
                        (int) (length - strlen(extension)));
            }
            goto done;
        }
        case FILE_EXTENSION:
            if (objc != 3) {
                errorString = "extension name";
                goto not3Args;
            }
            extension = TclGetExtension(Tcl_GetStringFromObj(objv[2],&length));
 
            if (extension != NULL) {
                Tcl_SetStringObj(resultPtr, extension, (int)strlen(extension));
            }
            goto done;
        case FILE_PATHTYPE:
            if (objc != 3) {
                errorString = "pathtype name";
                goto not3Args;
            }
            switch (Tcl_GetPathType(Tcl_GetStringFromObj(objv[2], &length))) {
                case TCL_PATH_ABSOLUTE:
                    Tcl_SetStringObj(resultPtr, "absolute", -1);
                    break;
                case TCL_PATH_RELATIVE:
                    Tcl_SetStringObj(resultPtr, "relative", -1);
                    break;
                case TCL_PATH_VOLUME_RELATIVE:
                    Tcl_SetStringObj(resultPtr, "volumerelative", -1);
                    break;
            }
            goto done;
        case FILE_SPLIT: {
            int pargc, i;
            char **pargvList;
            Tcl_Obj *listObjPtr;
 
            if (objc != 3) {
                errorString = "split name";
                goto not3Args;
            }
 
            Tcl_SplitPath(Tcl_GetStringFromObj(objv[2], &length), &pargc,
                    &pargvList);
            listObjPtr = Tcl_NewListObj(0, (Tcl_Obj **) NULL);
            for (i = 0; i < pargc; i++) {
                Tcl_ListObjAppendElement(interp, listObjPtr,
                        Tcl_NewStringObj(pargvList[i], -1));
            }
            ckfree((char *) pargvList);
            Tcl_SetObjResult(interp, listObjPtr);
            goto done;
        }
        case FILE_JOIN: {
            char **pargv = (char **) ckalloc((objc - 2) * sizeof(char *));
            int i;
 
            for (i = 2; i < objc; i++) {
                pargv[i - 2] = Tcl_GetStringFromObj(objv[i], &length);
            }
            Tcl_JoinPath(objc - 2, pargv, &buffer);
            Tcl_SetStringObj(resultPtr, Tcl_DStringValue(&buffer),
                    buffer.length);
            ckfree((char *) pargv);
            Tcl_DStringFree(&buffer);
            goto done;
        }
        case FILE_RENAME: {
            char **pargv = (char **) ckalloc(objc * sizeof(char *));
            int i;
 
            for (i = 0; i < objc; i++) {
                pargv[i] = Tcl_GetStringFromObj(objv[i], &length);
            }
            result = TclFileRenameCmd(interp, objc, pargv);
            ckfree((char *) pargv);
            goto done;
        }
        case FILE_MKDIR: {
            char **pargv = (char **) ckalloc(objc * sizeof(char *));
            int i;
 
            for (i = 0; i < objc; i++) {
                pargv[i] = Tcl_GetStringFromObj(objv[i], &length);
            }
            result = TclFileMakeDirsCmd(interp, objc, pargv);
            ckfree((char *) pargv);
            goto done;
        }
        case FILE_DELETE: {
            char **pargv = (char **) ckalloc(objc * sizeof(char *));
            int i;
 
            for (i = 0; i < objc; i++) {
                pargv[i] = Tcl_GetStringFromObj(objv[i], &length);
            }
            result = TclFileDeleteCmd(interp, objc, pargv);
            ckfree((char *) pargv);
            goto done;
        }
        case FILE_COPY: {
            char **pargv = (char **) ckalloc(objc * sizeof(char *));
            int i;
 
            for (i = 0; i < objc; i++) {
                pargv[i] = Tcl_GetStringFromObj(objv[i], &length);
            }
            result = TclFileCopyCmd(interp, objc, pargv);
            ckfree((char *) pargv);
            goto done;
        }
        case FILE_NATIVENAME:
            fileName = Tcl_TranslateFileName(interp,
                    Tcl_GetStringFromObj(objv[2], &length), &buffer);
            if (fileName == NULL) {
                result = TCL_ERROR ;
            } else {
                Tcl_SetStringObj(resultPtr, fileName, -1);
            }
            goto done;
    }
 
    /*
     * Next, handle operations that can be satisfied with the "access"
     * kernel call.
     */
 
    fileName = Tcl_TranslateFileName(interp,
            Tcl_GetStringFromObj(objv[2], &length), &buffer);
 
    switch (index) {
        case FILE_READABLE:
            if (objc != 3) {
                errorString = "readable name";
                goto not3Args;
            }
            mode = R_OK;
checkAccess:
            /*
             * The result might have been set within Tcl_TranslateFileName
             * (like no such user "blah" for file exists ~blah)
             * but we don't want to flag an error in that case.
             */
            if (fileName == NULL) {
                Tcl_SetObjResult(interp, Tcl_NewBooleanObj(0));
            } else {
                Tcl_SetBooleanObj(resultPtr, (TclAccess(fileName, mode) != -1));
            }
            goto done;
          case FILE_WRITABLE:
            if (objc != 3) {
                errorString = "writable name";
                goto not3Args;
            }
            mode = W_OK;
            goto checkAccess;
          case FILE_EXECUTABLE:
            if (objc != 3) {
                errorString = "executable name";
                goto not3Args;
            }
            mode = X_OK;
            goto checkAccess;
          case FILE_EXISTS:
            if (objc != 3) {
                errorString = "exists name";
                goto not3Args;
            }
            mode = F_OK;
            goto checkAccess;
    }
 
 
    /*
     * Lastly, check stuff that requires the file to be stat-ed.
     */
 
    if (fileName == NULL) {
        result = TCL_ERROR;
        goto done;
    }
 
    switch (index) {
        case FILE_ATIME:
            if (objc != 3) {
                errorString = "atime name";
                goto not3Args;
            }
 
            if (TclStat(fileName, &statBuf) == -1) {
                goto badStat;
            }
            Tcl_SetLongObj(resultPtr, (long) statBuf.st_atime);
            goto done;
        case FILE_ISDIRECTORY:
            if (objc != 3) {
                errorString = "isdirectory name";
                goto not3Args;
            }
            statOp = 2;
            break;
        case FILE_ISFILE:
            if (objc != 3) {
                errorString = "isfile name";
                goto not3Args;
            }
            statOp = 1;
            break;
        case FILE_LSTAT:
            if (objc != 4) {
                Tcl_WrongNumArgs(interp, 1, objv, "lstat name varName");
                result = TCL_ERROR;
                goto done;
            }
 
            if (lstat(fileName, &statBuf) == -1) {
                Tcl_AppendStringsToObj(resultPtr, "couldn't lstat \"",
                        Tcl_GetStringFromObj(objv[2], &length), "\": ",
                        Tcl_PosixError(interp), (char *) NULL);
                result = TCL_ERROR;
                goto done;
            }
            result = StoreStatData(interp, Tcl_GetStringFromObj(objv[3],
                    &length), &statBuf);
            goto done;
        case FILE_MTIME:
            if (objc != 3) {
                errorString = "mtime name";
                goto not3Args;
            }
            if (TclStat(fileName, &statBuf) == -1) {
                goto badStat;
            }
            Tcl_SetLongObj(resultPtr, (long) statBuf.st_mtime);
            goto done;
        case FILE_OWNED:
            if (objc != 3) {
                errorString = "owned name";
                goto not3Args;
            }
            statOp = 0;
            break;
        case FILE_READLINK: {
            char linkValue[MAXPATHLEN + 1];
            int linkLength;
 
            if (objc != 3) {
                errorString = "readlink name";
                goto not3Args;
            }
 
            /*
             * If S_IFLNK isn't defined it means that the machine doesn't
             * support symbolic links, so the file can't possibly be a
             * symbolic link.  Generate an EINVAL error, which is what
             * happens on machines that do support symbolic links when
             * you invoke readlink on a file that isn't a symbolic link.
             */
 
#ifndef S_IFLNK
            linkLength = -1;
            errno = EINVAL;
#else
            linkLength = readlink(fileName, linkValue, sizeof(linkValue) - 1);
#endif /* S_IFLNK */
            if (linkLength == -1) {
                Tcl_AppendStringsToObj(resultPtr, "couldn't readlink \"",
                        Tcl_GetStringFromObj(objv[2], &length), "\": ",
                        Tcl_PosixError(interp), (char *) NULL);
                result = TCL_ERROR;
                goto done;
            }
            linkValue[linkLength] = 0;
            Tcl_SetStringObj(resultPtr, linkValue, linkLength);
            goto done;
        }
        case FILE_SIZE:
            if (objc != 3) {
                errorString = "size name";
                goto not3Args;
            }
            if (TclStat(fileName, &statBuf) == -1) {
                goto badStat;
            }
            Tcl_SetLongObj(resultPtr, (long) statBuf.st_size);
            goto done;
        case FILE_STAT:
            if (objc != 4) {
                Tcl_WrongNumArgs(interp, 1, objv, "stat name varName");
                result = TCL_ERROR;
                goto done;
            }
 
            if (TclStat(fileName, &statBuf) == -1) {
badStat:
                Tcl_AppendStringsToObj(resultPtr, "couldn't stat \"",
                        Tcl_GetStringFromObj(objv[2], &length),
                        "\": ", Tcl_PosixError(interp), (char *) NULL);
                result = TCL_ERROR;
                goto done;
            }
            result = StoreStatData(interp, Tcl_GetStringFromObj(objv[3],
                    &length), &statBuf);
            goto done;
        case FILE_TYPE:
            if (objc != 3) {
                errorString = "type name";
                goto not3Args;
            }
            if (lstat(fileName, &statBuf) == -1) {
                goto badStat;
            }
            errorString = GetTypeFromMode((int) statBuf.st_mode);
            Tcl_SetStringObj(resultPtr, errorString, -1);
            goto done;
    }
 
    if (TclStat(fileName, &statBuf) == -1) {
        Tcl_SetBooleanObj(resultPtr, 0);
        goto done;
    }
    switch (statOp) {
        case 0:
            /*
             * For Windows and Macintosh, there are no user ids
             * associated with a file, so we always return 1.
             */
 
#if (defined(__WIN32__) || defined(MAC_TCL))
            mode = 1;
#else
            mode = (geteuid() == statBuf.st_uid);
#endif
            break;
        case 1:
            mode = S_ISREG(statBuf.st_mode);
            break;
        case 2:
            mode = S_ISDIR(statBuf.st_mode);
            break;
    }
    Tcl_SetBooleanObj(resultPtr, mode);
 
done:
    Tcl_DStringFree(&buffer);
    return result;
 
not3Args:
    Tcl_WrongNumArgs(interp, 1, objv, errorString);
    result = TCL_ERROR;
    goto done;
}
 
/*
 *----------------------------------------------------------------------
 *
 * StoreStatData --
 *
 *      This is a utility procedure that breaks out the fields of a
 *      "stat" structure and stores them in textual form into the
 *      elements of an associative array.
 *
 * Results:
 *      Returns a standard Tcl return value.  If an error occurs then
 *      a message is left in interp->result.
 *
 * Side effects:
 *      Elements of the associative array given by "varName" are modified.
 *
 *----------------------------------------------------------------------
 */
 
static int
StoreStatData(interp, varName, statPtr)
    Tcl_Interp *interp;                 /* Interpreter for error reports. */
    char *varName;                      /* Name of associative array variable
                                         * in which to store stat results. */
    struct stat *statPtr;               /* Pointer to buffer containing
                                         * stat data to store in varName. */
{
    char string[30];
 
    sprintf(string, "%ld", (long) statPtr->st_dev);
    if (Tcl_SetVar2(interp, varName, "dev", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_ino);
    if (Tcl_SetVar2(interp, varName, "ino", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_mode);
    if (Tcl_SetVar2(interp, varName, "mode", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_nlink);
    if (Tcl_SetVar2(interp, varName, "nlink", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_uid);
    if (Tcl_SetVar2(interp, varName, "uid", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_gid);
    if (Tcl_SetVar2(interp, varName, "gid", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%lu", (unsigned long) statPtr->st_size);
    if (Tcl_SetVar2(interp, varName, "size", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_atime);
    if (Tcl_SetVar2(interp, varName, "atime", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_mtime);
    if (Tcl_SetVar2(interp, varName, "mtime", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    sprintf(string, "%ld", (long) statPtr->st_ctime);
    if (Tcl_SetVar2(interp, varName, "ctime", string, TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    if (Tcl_SetVar2(interp, varName, "type",
            GetTypeFromMode((int) statPtr->st_mode), TCL_LEAVE_ERR_MSG)
            == NULL) {
        return TCL_ERROR;
    }
    return TCL_OK;
}
 
/*
 *----------------------------------------------------------------------
 *
 * GetTypeFromMode --
 *
 *      Given a mode word, returns a string identifying the type of a
 *      file.
 *
 * Results:
 *      A static text string giving the file type from mode.
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */
 
static char *
GetTypeFromMode(mode)
    int mode;
{
    if (S_ISREG(mode)) {
        return "file";
    } else if (S_ISDIR(mode)) {
        return "directory";
    } else if (S_ISCHR(mode)) {
        return "characterSpecial";
    } else if (S_ISBLK(mode)) {
        return "blockSpecial";
    } else if (S_ISFIFO(mode)) {
        return "fifo";
#ifdef S_ISLNK
    } else if (S_ISLNK(mode)) {
        return "link";
#endif
#ifdef S_ISSOCK
    } else if (S_ISSOCK(mode)) {
        return "socket";
#endif
    }
    return "unknown";
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ForCmd --
 *
 *      This procedure is invoked to process the "for" 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 "for" or the name
 *      to which "for" was renamed: e.g.,
 *      "set z for; $z {set i 0} {$i<100} {incr i} {puts $i}"
 *
 * Results:
 *      A standard Tcl result.
 *
 * Side effects:
 *      See the user documentation.
 *
 *----------------------------------------------------------------------
 */
 
        /* ARGSUSED */
int
Tcl_ForCmd(dummy, interp, argc, argv)
    ClientData dummy;                   /* Not used. */
    Tcl_Interp *interp;                 /* Current interpreter. */
    int argc;                           /* Number of arguments. */
    char **argv;                        /* Argument strings. */
{
    int result, value;
 
    if (argc != 5) {
        Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
                " start test next command\"", (char *) NULL);
        return TCL_ERROR;
    }
 
    result = Tcl_Eval(interp, argv[1]);
    if (result != TCL_OK) {
        if (result == TCL_ERROR) {
            Tcl_AddErrorInfo(interp, "\n    (\"for\" initial command)");
        }
        return result;
    }
    while (1) {
        result = Tcl_ExprBoolean(interp, argv[2], &value);
        if (result != TCL_OK) {
            return result;
        }
        if (!value) {
            break;
        }
        result = Tcl_Eval(interp, argv[4]);
        if ((result != TCL_OK) && (result != TCL_CONTINUE)) {
            if (result == TCL_ERROR) {
                char msg[60];
                sprintf(msg, "\n    (\"for\" body line %d)",interp->errorLine);
                Tcl_AddErrorInfo(interp, msg);
            }
            break;
        }
        result = Tcl_Eval(interp, argv[3]);
        if (result == TCL_BREAK) {
            break;
        } else if (result != TCL_OK) {
            if (result == TCL_ERROR) {
                Tcl_AddErrorInfo(interp, "\n    (\"for\" loop-end command)");
            }
            return result;
        }
    }
    if (result == TCL_BREAK) {
        result = TCL_OK;
    }
    if (result == TCL_OK) {
        Tcl_ResetResult(interp);
    }
    return result;
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_ForeachObjCmd --
 *
 *      This object-based procedure is invoked to process the "foreach" 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_ForeachObjCmd(dummy, interp, objc, objv)
    ClientData dummy;           /* Not used. */
    Tcl_Interp *interp;         /* Current interpreter. */
    int objc;                   /* Number of arguments. */
    Tcl_Obj *CONST objv[];      /* Argument objects. */
{
    int result = TCL_OK;
    int i;                      /* i selects a value list */
    int j, maxj;                /* Number of loop iterations */
    int v;                      /* v selects a loop variable */
    int numLists;               /* Count of value lists */
    Tcl_Obj *bodyPtr;
 
    /*
     * We copy the argument object pointers into a local array to avoid
     * the problem that "objv" might become invalid. It is a pointer into
     * the evaluation stack and that stack might be grown and reallocated
     * if the loop body requires a large amount of stack space.
     */
 
#define NUM_ARGS 9
    Tcl_Obj *(argObjStorage[NUM_ARGS]);
    Tcl_Obj **argObjv = argObjStorage;
 
#define STATIC_LIST_SIZE 4
    int indexArray[STATIC_LIST_SIZE];     /* Array of value list indices */
    int varcListArray[STATIC_LIST_SIZE];  /* # loop variables per list */
    Tcl_Obj **varvListArray[STATIC_LIST_SIZE]; /* Array of var name lists */
    int argcListArray[STATIC_LIST_SIZE];  /* Array of value list sizes */
    Tcl_Obj **argvListArray[STATIC_LIST_SIZE]; /* Array of value lists */
 
    int *index = indexArray;
    int *varcList = varcListArray;
    Tcl_Obj ***varvList = varvListArray;
    int *argcList = argcListArray;
    Tcl_Obj ***argvList = argvListArray;
 
    if (objc < 4 || (objc%2 != 0)) {
        Tcl_WrongNumArgs(interp, 1, objv,
                "varList list ?varList list ...? command");
        return TCL_ERROR;
    }
 
    /*
     * Create the object argument array "argObjv". Make sure argObjv is
     * large enough to hold the objc arguments.
     */
 
    if (objc > NUM_ARGS) {
        argObjv = (Tcl_Obj **) ckalloc(objc * sizeof(Tcl_Obj *));
    }
    for (i = 0;  i < objc;  i++) {
        argObjv[i] = objv[i];
    }
 
    /*
     * Manage numList parallel value lists.
     * argvList[i] is a value list counted by argcList[i]
     * varvList[i] is the list of variables associated with the value list
     * varcList[i] is the number of variables associated with the value list
     * index[i] is the current pointer into the value list argvList[i]
     */
 
    numLists = (objc-2)/2;
    if (numLists > STATIC_LIST_SIZE) {
        index = (int *) ckalloc(numLists * sizeof(int));
        varcList = (int *) ckalloc(numLists * sizeof(int));
        varvList = (Tcl_Obj ***) ckalloc(numLists * sizeof(Tcl_Obj **));
        argcList = (int *) ckalloc(numLists * sizeof(int));
        argvList = (Tcl_Obj ***) ckalloc(numLists * sizeof(Tcl_Obj **));
    }
    for (i = 0;  i < numLists;  i++) {
        index[i] = 0;
        varcList[i] = 0;
        varvList[i] = (Tcl_Obj **) NULL;
        argcList[i] = 0;
        argvList[i] = (Tcl_Obj **) NULL;
    }
 
    /*
     * Break up the value lists and variable lists into elements
     * THIS FAILS IF THE OBJECT'S STRING REP HAS A NULL BYTE.
     */
 
    maxj = 0;
    for (i = 0;  i < numLists;  i++) {
        result = Tcl_ListObjGetElements(interp, argObjv[1+i*2],
                &varcList[i], &varvList[i]);
        if (result != TCL_OK) {
            goto done;
        }
        if (varcList[i] < 1) {
            Tcl_AppendToObj(Tcl_GetObjResult(interp),
                    "foreach varlist is empty", -1);
            result = TCL_ERROR;
            goto done;
        }
 
        result = Tcl_ListObjGetElements(interp, argObjv[2+i*2],
                &argcList[i], &argvList[i]);
        if (result != TCL_OK) {
            goto done;
        }
 
        j = argcList[i] / varcList[i];
        if ((argcList[i] % varcList[i]) != 0) {
            j++;
        }
        if (j > maxj) {
            maxj = j;
        }
    }
 
    /*
     * Iterate maxj times through the lists in parallel
     * If some value lists run out of values, set loop vars to ""
     */
 
    bodyPtr = argObjv[objc-1];
    for (j = 0;  j < maxj;  j++) {
        for (i = 0;  i < numLists;  i++) {
            /*
             * If a variable or value list object has been converted to
             * another kind of Tcl object, convert it back to a list object
             * and refetch the pointer to its element array.
             */
 
            if (argObjv[1+i*2]->typePtr != &tclListType) {
                result = Tcl_ListObjGetElements(interp, argObjv[1+i*2],
                        &varcList[i], &varvList[i]);
                if (result != TCL_OK) {
                    panic("Tcl_ForeachObjCmd: could not reconvert variable list %d to a list object\n", i);
                }
            }
            if (argObjv[2+i*2]->typePtr != &tclListType) {
                result = Tcl_ListObjGetElements(interp, argObjv[2+i*2],
                        &argcList[i], &argvList[i]);
                if (result != TCL_OK) {
                    panic("Tcl_ForeachObjCmd: could not reconvert value list %d to a list object\n", i);
                }
            }
 
            for (v = 0;  v < varcList[i];  v++) {
                int k = index[i]++;
                Tcl_Obj *valuePtr, *varValuePtr;
                int isEmptyObj = 0;
 
                if (k < argcList[i]) {
                    valuePtr = argvList[i][k];
                } else {
                    valuePtr = Tcl_NewObj(); /* empty string */
                    isEmptyObj = 1;
                }
                varValuePtr = Tcl_ObjSetVar2(interp, varvList[i][v], NULL,
                        valuePtr, TCL_PARSE_PART1);
                if (varValuePtr == NULL) {
                    if (isEmptyObj) {
                        Tcl_DecrRefCount(valuePtr);
                    }
                    Tcl_ResetResult(interp);
                    Tcl_AppendStringsToObj(Tcl_GetObjResult(interp),
                        "couldn't set loop variable: \"",
                        Tcl_GetStringFromObj(varvList[i][v], (int *) NULL),
                        "\"", (char *) NULL);
                    result = TCL_ERROR;
                    goto done;
                }
 
            }
        }
 
        result = Tcl_EvalObj(interp, bodyPtr);
        if (result != TCL_OK) {
            if (result == TCL_CONTINUE) {
                result = TCL_OK;
            } else if (result == TCL_BREAK) {
                result = TCL_OK;
                break;
            } else if (result == TCL_ERROR) {
                char msg[100];
                sprintf(msg, "\n    (\"foreach\" body line %d)",
                        interp->errorLine);
                Tcl_AddObjErrorInfo(interp, msg, -1);
                break;
            } else {
                break;
            }
        }
    }
    if (result == TCL_OK) {
        Tcl_ResetResult(interp);
    }
 
    done:
    if (numLists > STATIC_LIST_SIZE) {
        ckfree((char *) index);
        ckfree((char *) varcList);
        ckfree((char *) argcList);
        ckfree((char *) varvList);
        ckfree((char *) argvList);
    }
    if (argObjv != argObjStorage) {
        ckfree((char *) argObjv);
    }
    return result;
#undef STATIC_LIST_SIZE
#undef NUM_ARGS
}
 
/*
 *----------------------------------------------------------------------
 *
 * Tcl_FormatObjCmd --
 *
 *      This procedure is invoked to process the "format" 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_FormatObjCmd(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 char *format;      /* Used to read characters from the format
                                 * string. */
    int formatLen;              /* The length of the format string */
    char *endPtr;               /* Points to the last char in format array */
    char newFormat[40];         /* A new format specifier is generated here. */
    int width;                  /* Field width from field specifier, or 0 if
                                 * no width given. */
    int precision;              /* Field precision from field specifier, or 0
                                 * if no precision given. */
    int size;                   /* Number of bytes needed for result of
                                 * conversion, based on type of conversion
                                 * ("e", "s", etc.), width, and precision. */
    int intValue;               /* Used to hold value to pass to sprintf, if
                                 * it's a one-word integer or char value */
    char *ptrValue = NULL;      /* Used to hold value to pass to sprintf, if
                                 * it's a one-word value. */
    double doubleValue;         /* Used to hold value to pass to sprintf if
                                 * it's a double value. */
    int whichValue;             /* Indicates which of intValue, ptrValue,
                                 * or doubleValue has the value to pass to
                                 * sprintf, according to the following
                                 * definitions: */
#   define INT_VALUE 0
#   define PTR_VALUE 1
#   define DOUBLE_VALUE 2
#   define MAX_FLOAT_SIZE 320
 
    Tcl_Obj *resultPtr;         /* Where result is stored finally. */
    char staticBuf[MAX_FLOAT_SIZE + 1];
                                /* A static buffer to copy the format results
                                 * into */
    char *dst = staticBuf;      /* The buffer that sprintf writes into each
                                 * time the format processes a specifier */
    int dstSize = MAX_FLOAT_SIZE;
                                /* The size of the dst buffer */
    int noPercent;              /* Special case for speed:  indicates there's
                                 * no field specifier, just a string to copy.*/
    int objIndex;               /* Index of argument to substitute next. */
    int gotXpg = 0;              /* Non-zero means that an XPG3 %n$-style
                                 * specifier has been seen. */
    int gotSequential = 0;       /* Non-zero means that a regular sequential
                                 * (non-XPG3) conversion specifier has been
                                 * seen. */
    int useShort;               /* Value to be printed is short (half word). */
    char *end;                  /* Used to locate end of numerical fields. */
 
    /*
     * This procedure is a bit nasty.  The goal is to use sprintf to
     * do most of the dirty work.  There are several problems:
     * 1. this procedure can't trust its arguments.
     * 2. we must be able to provide a large enough result area to hold
     *    whatever's generated.  This is hard to estimate.
     * 2. there's no way to move the arguments from objv to the call
     *    to sprintf in a reasonable way.  This is particularly nasty
     *    because some of the arguments may be two-word values (doubles).
     * So, what happens here is to scan the format string one % group
     * at a time, making many individual calls to sprintf.
     */
 
    if (objc < 2) {
        Tcl_WrongNumArgs(interp, 1, objv,
                "formatString ?arg arg ...?");
        return TCL_ERROR;
    }
 
    format = Tcl_GetStringFromObj(objv[1], &formatLen);
    endPtr = format + formatLen;
    resultPtr = Tcl_NewObj();
    objIndex = 2;
 
    while (format < endPtr) {
        register char *newPtr = newFormat;
 
        width = precision = noPercent = useShort = 0;
        whichValue = PTR_VALUE;
 
        /*
         * Get rid of any characters before the next field specifier.
         */
        if (*format != '%') {
            ptrValue = format;
            while ((*format != '%') && (format < endPtr)) {
                format++;
            }
            size = format - ptrValue;
            noPercent = 1;
            goto doField;
        }
 
        if (format[1] == '%') {
            ptrValue = format;
            size = 1;
            noPercent = 1;
            format += 2;
            goto doField;
        }
 
        /*
         * Parse off a field specifier, compute how many characters
         * will be needed to store the result, and substitute for
         * "*" size specifiers.
         */
        *newPtr = '%';
        newPtr++;
        format++;
        if (isdigit(UCHAR(*format))) {
            int tmp;
 
            /*
             * Check for an XPG3-style %n$ specification.  Note: there
             * must not be a mixture of XPG3 specs and non-XPG3 specs
             * in the same format string.
             */
 
            tmp = strtoul(format, &end, 10);
            if (*end != '$') {
                goto notXpg;
            }
            format = end+1;
            gotXpg = 1;
            if (gotSequential) {
                goto mixedXPG;
            }
            objIndex = tmp+1;
            if ((objIndex < 2) || (objIndex >= objc)) {
                goto badIndex;
            }
            goto xpgCheckDone;
        }
 
        notXpg:
        gotSequential = 1;
        if (gotXpg) {
            goto mixedXPG;
        }
 
        xpgCheckDone:
        while ((*format == '-') || (*format == '#') || (*format == '0')
                || (*format == ' ') || (*format == '+')) {
            *newPtr = *format;
            newPtr++;
            format++;
        }
        if (isdigit(UCHAR(*format))) {
            width = strtoul(format, &end, 10);
            format = end;
        } else if (*format == '*') {
            if (objIndex >= objc) {
                goto badIndex;
            }
            if (Tcl_GetIntFromObj(interp, objv[objIndex],
                    &width) != TCL_OK) {
                goto fmtError;
            }
            objIndex++;
            format++;
        }
        if (width > 100000) {
            /*
             * Don't allow arbitrarily large widths:  could cause core
             * dump when we try to allocate a zillion bytes of memory
             * below.
             */
 
            width = 100000;
        } else if (width < 0) {
            width = 0;
        }
        if (width != 0) {
            TclFormatInt(newPtr, width);
            while (*newPtr != 0) {
                newPtr++;
            }
        }
        if (*format == '.') {
            *newPtr = '.';
            newPtr++;
            format++;
        }
        if (isdigit(UCHAR(*format))) {
            precision = strtoul(format, &end, 10);
            format = end;
        } else if (*format == '*') {
            if (objIndex >= objc) {
                goto badIndex;
            }
            if (Tcl_GetIntFromObj(interp, objv[objIndex],
                    &precision) != TCL_OK) {
                goto fmtError;
            }
            objIndex++;
            format++;
        }
        if (precision != 0) {
            TclFormatInt(newPtr, precision);
            while (*newPtr != 0) {
                newPtr++;
            }
        }
        if (*format == 'l') {
            format++;
        } else if (*format == 'h') {
            useShort = 1;
            *newPtr = 'h';
            newPtr++;
            format++;
        }
        *newPtr = *format;
        newPtr++;
        *newPtr = 0;
        if (objIndex >= objc) {
            goto badIndex;
        }
        switch (*format) {
            case 'i':
                newPtr[-1] = 'd';
            case 'd':
            case 'o':
            case 'u':
            case 'x':
            case 'X':
                if (Tcl_GetIntFromObj(interp, objv[objIndex],
                        (int *) &intValue) != TCL_OK) {
                    goto fmtError;
                }
                whichValue = INT_VALUE;
                size = 40 + precision;
                break;
            case 's':
                ptrValue = Tcl_GetStringFromObj(objv[objIndex], &size);
                break;
            case 'c':
                if (Tcl_GetIntFromObj(interp, objv[objIndex],
                        (int *) &intValue) != TCL_OK) {
                    goto fmtError;
                }
                whichValue = INT_VALUE;
                size = 1;
                break;
            case 'e':
            case 'E':
            case 'f':
            case 'g':
            case 'G':
                if (Tcl_GetDoubleFromObj(interp, objv[objIndex],
                        &doubleValue) != TCL_OK) {
                    goto fmtError;
                }
                whichValue = DOUBLE_VALUE;
                size = MAX_FLOAT_SIZE;
                if (precision > 10) {
                    size += precision;
                }
                break;
            case 0:
                Tcl_SetResult(interp,
                        "format string ended in middle of field specifier",
                        TCL_STATIC);
                goto fmtError;
            default:
                {
                    char buf[40];
                    sprintf(buf, "bad field specifier \"%c\"", *format);
                    Tcl_SetResult(interp, buf, TCL_VOLATILE);
                    goto fmtError;
                }
        }
        objIndex++;
        format++;
 
        /*
         * Make sure that there's enough space to hold the formatted
         * result, then format it.
         */
 
        doField:
        if (width > size) {
            size = width;
        }
        if (noPercent) {
            Tcl_AppendToObj(resultPtr, ptrValue, size);
        } else {
            if (size > dstSize) {
                if (dst != staticBuf) {
                    ckfree(dst);
                }
                dst = (char *) ckalloc((unsigned) (size + 1));
                dstSize = size;
            }
 
            if (whichValue == DOUBLE_VALUE) {
                sprintf(dst, newFormat, doubleValue);
            } else if (whichValue == INT_VALUE) {
                if (useShort) {
                    sprintf(dst, newFormat, (short) intValue);
                } else {
                    sprintf(dst, newFormat, intValue);
                }
            } else {
                sprintf(dst, newFormat, ptrValue);
            }
            Tcl_AppendToObj(resultPtr, dst, -1);
        }
    }
 
    Tcl_SetObjResult(interp, resultPtr);
    if(dst != staticBuf) {
        ckfree(dst);
    }
    return TCL_OK;
 
    mixedXPG:
    Tcl_SetResult(interp,
            "cannot mix \"%\" and \"%n$\" conversion specifiers", TCL_STATIC);
    goto fmtError;
 
    badIndex:
    if (gotXpg) {
        Tcl_SetResult(interp,
                "\"%n$\" argument index out of range", TCL_STATIC);
    } else {
        Tcl_SetResult(interp,
                "not enough arguments for all format specifiers", TCL_STATIC);
    }
 
    fmtError:
    if(dst != staticBuf) {
        ckfree(dst);
    }
    Tcl_DecrRefCount(resultPtr);
    return TCL_ERROR;
}
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[/] [or1k/] [trunk/] [insight/] [tcl/] [generic/] [tclCmdAH.c] - Blame information for rev 1780

Line No.	Rev	Author	Line
1	578	markom	`/*`
2			`* tclCmdAH.c --`
3			`*`
4			`* This file contains the top-level command routines for most of`
5			`* the Tcl built-in commands whose names begin with the letters`
6			`* A to H.`
7			`*`
8			`* Copyright (c) 1987-1993 The Regents of the University of California.`
9			`* Copyright (c) 1994-1997 Sun Microsystems, Inc.`
10			`*`
11			`* See the file "license.terms" for information on usage and redistribution`
12			`* of this file, and for a DISCLAIMER OF ALL WARRANTIES.`
13			`*`
14			`* RCS: @(#) $Id: tclCmdAH.c,v 1.1.1.1 2002-01-16 10:25:25 markom Exp $`
15			`*/`
16
17			`#include "tclInt.h"`
18			`#include "tclPort.h"`
19
20			`/*`
21			`* Prototypes for local procedures defined in this file:`
22			`*/`
23
24			`static char * GetTypeFromMode _ANSI_ARGS_((int mode));`
25			`static int StoreStatData _ANSI_ARGS_((Tcl_Interp *interp,`
26			`char varName, struct stat statPtr));`
27
28			`/*`
29			`*----------------------------------------------------------------------`
30			`*`
31			`* Tcl_BreakCmd --`
32			`*`
33			`* This procedure is invoked to process the "break" Tcl command.`
34			`* See the user documentation for details on what it does.`
35			`*`
36			`* With the bytecode compiler, this procedure is only called when`
37			`* a command name is computed at runtime, and is "break" or the name`
38			`* to which "break" was renamed: e.g., "set z break; $z"`
39			`*`
40			`* Results:`