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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.
- *
- * SCCS: @(#) tclCmdAH.c 1.156 97/08/12 18:10:15
- */
-
- #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 */
- }
- }
-
- /*
- * 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, (access(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 (stat(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 (stat(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 (stat(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 (stat(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 (stat(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];
- /* 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;
- }
-