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/* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkargv.c,v 1.1.1.1 2001/06/13 04:53:35 dtashley Exp $ */
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2 |
|
3 |
/*
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4 |
* tkArgv.c --
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5 |
*
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* This file contains a procedure that handles table-based
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* argv-argc parsing.
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8 |
*
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* Copyright (c) 1990-1994 The Regents of the University of California.
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* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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*
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* See the file "license.terms" for information on usage and redistribution
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* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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*
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* RCS: @(#) $Id: tkargv.c,v 1.1.1.1 2001/06/13 04:53:35 dtashley Exp $
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*/
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#include "tkPort.h"
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#include "tk.h"
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/*
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* Default table of argument descriptors. These are normally available
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* in every application.
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*/
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static Tk_ArgvInfo defaultTable[] = {
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{"-help", TK_ARGV_HELP, (char *) NULL, (char *) NULL,
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"Print summary of command-line options and abort"},
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{NULL, TK_ARGV_END, (char *) NULL, (char *) NULL,
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(char *) NULL}
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};
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/*
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* Forward declarations for procedures defined in this file:
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*/
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static void PrintUsage _ANSI_ARGS_((Tcl_Interp *interp,
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Tk_ArgvInfo *argTable, int flags));
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/*
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*----------------------------------------------------------------------
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*
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* Tk_ParseArgv --
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*
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* Process an argv array according to a table of expected
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* command-line options. See the manual page for more details.
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*
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* Results:
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* The return value is a standard Tcl return value. If an
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* error occurs then an error message is left in the interp's result.
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* Under normal conditions, both *argcPtr and *argv are modified
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* to return the arguments that couldn't be processed here (they
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* didn't match the option table, or followed an TK_ARGV_REST
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* argument).
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*
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* Side effects:
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* Variables may be modified, resources may be entered for tkwin,
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* or procedures may be called. It all depends on the arguments
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* and their entries in argTable. See the user documentation
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* for details.
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*
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*----------------------------------------------------------------------
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*/
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int
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Tk_ParseArgv(interp, tkwin, argcPtr, argv, argTable, flags)
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Tcl_Interp *interp; /* Place to store error message. */
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Tk_Window tkwin; /* Window to use for setting Tk options.
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* NULL means ignore Tk option specs. */
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int *argcPtr; /* Number of arguments in argv. Modified
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* to hold # args left in argv at end. */
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char **argv; /* Array of arguments. Modified to hold
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* those that couldn't be processed here. */
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Tk_ArgvInfo *argTable; /* Array of option descriptions */
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int flags; /* Or'ed combination of various flag bits,
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* such as TK_ARGV_NO_DEFAULTS. */
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{
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register Tk_ArgvInfo *infoPtr;
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/* Pointer to the current entry in the
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* table of argument descriptions. */
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Tk_ArgvInfo *matchPtr; /* Descriptor that matches current argument. */
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char *curArg; /* Current argument */
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register char c; /* Second character of current arg (used for
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* quick check for matching; use 2nd char.
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* because first char. will almost always
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* be '-'). */
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int srcIndex; /* Location from which to read next argument
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* from argv. */
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int dstIndex; /* Index into argv to which next unused
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* argument should be copied (never greater
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* than srcIndex). */
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int argc; /* # arguments in argv still to process. */
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size_t length; /* Number of characters in current argument. */
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int i;
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if (flags & TK_ARGV_DONT_SKIP_FIRST_ARG) {
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srcIndex = dstIndex = 0;
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argc = *argcPtr;
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} else {
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srcIndex = dstIndex = 1;
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argc = *argcPtr-1;
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}
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while (argc > 0) {
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curArg = argv[srcIndex];
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srcIndex++;
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argc--;
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length = strlen(curArg);
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if (length > 0) {
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c = curArg[1];
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} else {
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c = 0;
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}
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/*
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* Loop throught the argument descriptors searching for one with
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* the matching key string. If found, leave a pointer to it in
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* matchPtr.
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*/
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matchPtr = NULL;
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for (i = 0; i < 2; i++) {
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if (i == 0) {
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infoPtr = argTable;
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} else {
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infoPtr = defaultTable;
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}
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for (; (infoPtr != NULL) && (infoPtr->type != TK_ARGV_END);
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infoPtr++) {
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if (infoPtr->key == NULL) {
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continue;
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}
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if ((infoPtr->key[1] != c)
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|| (strncmp(infoPtr->key, curArg, length) != 0)) {
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continue;
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}
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if ((tkwin == NULL)
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&& ((infoPtr->type == TK_ARGV_CONST_OPTION)
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|| (infoPtr->type == TK_ARGV_OPTION_VALUE)
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|| (infoPtr->type == TK_ARGV_OPTION_NAME_VALUE))) {
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continue;
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}
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if (infoPtr->key[length] == 0) {
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matchPtr = infoPtr;
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goto gotMatch;
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}
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if (flags & TK_ARGV_NO_ABBREV) {
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continue;
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}
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if (matchPtr != NULL) {
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Tcl_AppendResult(interp, "ambiguous option \"", curArg,
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"\"", (char *) NULL);
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return TCL_ERROR;
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}
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matchPtr = infoPtr;
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}
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}
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if (matchPtr == NULL) {
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/*
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* Unrecognized argument. Just copy it down, unless the caller
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* prefers an error to be registered.
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*/
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if (flags & TK_ARGV_NO_LEFTOVERS) {
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Tcl_AppendResult(interp, "unrecognized argument \"",
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curArg, "\"", (char *) NULL);
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return TCL_ERROR;
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}
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argv[dstIndex] = curArg;
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dstIndex++;
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continue;
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}
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/*
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* Take the appropriate action based on the option type
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*/
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gotMatch:
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infoPtr = matchPtr;
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switch (infoPtr->type) {
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case TK_ARGV_CONSTANT:
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*((int *) infoPtr->dst) = (int) infoPtr->src;
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break;
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case TK_ARGV_INT:
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if (argc == 0) {
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goto missingArg;
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} else {
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char *endPtr;
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*((int *) infoPtr->dst) =
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strtol(argv[srcIndex], &endPtr, 0);
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if ((endPtr == argv[srcIndex]) || (*endPtr != 0)) {
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Tcl_AppendResult(interp, "expected integer argument ",
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"for \"", infoPtr->key, "\" but got \"",
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argv[srcIndex], "\"", (char *) NULL);
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return TCL_ERROR;
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}
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srcIndex++;
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argc--;
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}
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break;
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case TK_ARGV_STRING:
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if (argc == 0) {
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goto missingArg;
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} else {
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*((char **)infoPtr->dst) = argv[srcIndex];
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srcIndex++;
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argc--;
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}
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break;
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case TK_ARGV_UID:
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if (argc == 0) {
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goto missingArg;
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} else {
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*((Tk_Uid *)infoPtr->dst) = Tk_GetUid(argv[srcIndex]);
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srcIndex++;
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argc--;
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}
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break;
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case TK_ARGV_REST:
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*((int *) infoPtr->dst) = dstIndex;
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goto argsDone;
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case TK_ARGV_FLOAT:
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if (argc == 0) {
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goto missingArg;
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} else {
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char *endPtr;
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*((double *) infoPtr->dst) =
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strtod(argv[srcIndex], &endPtr);
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if ((endPtr == argv[srcIndex]) || (*endPtr != 0)) {
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Tcl_AppendResult(interp, "expected floating-point ",
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"argument for \"", infoPtr->key,
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"\" but got \"", argv[srcIndex], "\"",
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(char *) NULL);
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return TCL_ERROR;
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}
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srcIndex++;
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argc--;
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}
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break;
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case TK_ARGV_FUNC: {
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typedef int (ArgvFunc)_ANSI_ARGS_((char *, char *, char *));
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ArgvFunc *handlerProc;
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handlerProc = (ArgvFunc *) infoPtr->src;
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if ((*handlerProc)(infoPtr->dst, infoPtr->key,
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argv[srcIndex])) {
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srcIndex += 1;
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argc -= 1;
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}
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break;
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}
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case TK_ARGV_GENFUNC: {
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typedef int (ArgvGenFunc)_ANSI_ARGS_((char *, Tcl_Interp *,
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char *, int, char **));
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ArgvGenFunc *handlerProc;
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handlerProc = (ArgvGenFunc *) infoPtr->src;
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argc = (*handlerProc)(infoPtr->dst, interp, infoPtr->key,
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argc, argv+srcIndex);
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if (argc < 0) {
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return TCL_ERROR;
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}
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break;
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}
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case TK_ARGV_HELP:
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PrintUsage (interp, argTable, flags);
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return TCL_ERROR;
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case TK_ARGV_CONST_OPTION:
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Tk_AddOption(tkwin, infoPtr->dst, infoPtr->src,
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TK_INTERACTIVE_PRIO);
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break;
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case TK_ARGV_OPTION_VALUE:
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if (argc < 1) {
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goto missingArg;
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}
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Tk_AddOption(tkwin, infoPtr->dst, argv[srcIndex],
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TK_INTERACTIVE_PRIO);
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srcIndex++;
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argc--;
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break;
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case TK_ARGV_OPTION_NAME_VALUE:
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if (argc < 2) {
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Tcl_AppendResult(interp, "\"", curArg,
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"\" option requires two following arguments",
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(char *) NULL);
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return TCL_ERROR;
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}
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Tk_AddOption(tkwin, argv[srcIndex], argv[srcIndex+1],
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TK_INTERACTIVE_PRIO);
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srcIndex += 2;
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294 |
argc -= 2;
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break;
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296 |
default: {
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297 |
char buf[64 + TCL_INTEGER_SPACE];
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298 |
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299 |
sprintf(buf, "bad argument type %d in Tk_ArgvInfo",
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300 |
infoPtr->type);
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301 |
Tcl_SetResult(interp, buf, TCL_VOLATILE);
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302 |
return TCL_ERROR;
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303 |
}
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304 |
}
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305 |
}
|
306 |
|
307 |
/*
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308 |
* If we broke out of the loop because of an OPT_REST argument,
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309 |
* copy the remaining arguments down.
|
310 |
*/
|
311 |
|
312 |
argsDone:
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313 |
while (argc) {
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314 |
argv[dstIndex] = argv[srcIndex];
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315 |
srcIndex++;
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316 |
dstIndex++;
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317 |
argc--;
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318 |
}
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319 |
argv[dstIndex] = (char *) NULL;
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320 |
*argcPtr = dstIndex;
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321 |
return TCL_OK;
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322 |
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323 |
missingArg:
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324 |
Tcl_AppendResult(interp, "\"", curArg,
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325 |
"\" option requires an additional argument", (char *) NULL);
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326 |
return TCL_ERROR;
|
327 |
}
|
328 |
|
329 |
/*
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330 |
*----------------------------------------------------------------------
|
331 |
*
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332 |
* PrintUsage --
|
333 |
*
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334 |
* Generate a help string describing command-line options.
|
335 |
*
|
336 |
* Results:
|
337 |
* The interp's result will be modified to hold a help string
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338 |
* describing all the options in argTable, plus all those
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339 |
* in the default table unless TK_ARGV_NO_DEFAULTS is
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340 |
* specified in flags.
|
341 |
*
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342 |
* Side effects:
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343 |
* None.
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344 |
*
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345 |
*----------------------------------------------------------------------
|
346 |
*/
|
347 |
|
348 |
static void
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349 |
PrintUsage(interp, argTable, flags)
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350 |
Tcl_Interp *interp; /* Place information in this interp's
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351 |
* result area. */
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352 |
Tk_ArgvInfo *argTable; /* Array of command-specific argument
|
353 |
* descriptions. */
|
354 |
int flags; /* If the TK_ARGV_NO_DEFAULTS bit is set
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355 |
* in this word, then don't generate
|
356 |
* information for default options. */
|
357 |
{
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358 |
register Tk_ArgvInfo *infoPtr;
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359 |
int width, i, numSpaces;
|
360 |
#define NUM_SPACES 20
|
361 |
static char spaces[] = " ";
|
362 |
char tmp[TCL_DOUBLE_SPACE];
|
363 |
|
364 |
/*
|
365 |
* First, compute the width of the widest option key, so that we
|
366 |
* can make everything line up.
|
367 |
*/
|
368 |
|
369 |
width = 4;
|
370 |
for (i = 0; i < 2; i++) {
|
371 |
for (infoPtr = i ? defaultTable : argTable;
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372 |
infoPtr->type != TK_ARGV_END; infoPtr++) {
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373 |
int length;
|
374 |
if (infoPtr->key == NULL) {
|
375 |
continue;
|
376 |
}
|
377 |
length = strlen(infoPtr->key);
|
378 |
if (length > width) {
|
379 |
width = length;
|
380 |
}
|
381 |
}
|
382 |
}
|
383 |
|
384 |
Tcl_AppendResult(interp, "Command-specific options:", (char *) NULL);
|
385 |
for (i = 0; ; i++) {
|
386 |
for (infoPtr = i ? defaultTable : argTable;
|
387 |
infoPtr->type != TK_ARGV_END; infoPtr++) {
|
388 |
if ((infoPtr->type == TK_ARGV_HELP) && (infoPtr->key == NULL)) {
|
389 |
Tcl_AppendResult(interp, "\n", infoPtr->help, (char *) NULL);
|
390 |
continue;
|
391 |
}
|
392 |
Tcl_AppendResult(interp, "\n ", infoPtr->key, ":", (char *) NULL);
|
393 |
numSpaces = width + 1 - strlen(infoPtr->key);
|
394 |
while (numSpaces > 0) {
|
395 |
if (numSpaces >= NUM_SPACES) {
|
396 |
Tcl_AppendResult(interp, spaces, (char *) NULL);
|
397 |
} else {
|
398 |
Tcl_AppendResult(interp, spaces+NUM_SPACES-numSpaces,
|
399 |
(char *) NULL);
|
400 |
}
|
401 |
numSpaces -= NUM_SPACES;
|
402 |
}
|
403 |
Tcl_AppendResult(interp, infoPtr->help, (char *) NULL);
|
404 |
switch (infoPtr->type) {
|
405 |
case TK_ARGV_INT: {
|
406 |
sprintf(tmp, "%d", *((int *) infoPtr->dst));
|
407 |
Tcl_AppendResult(interp, "\n\t\tDefault value: ",
|
408 |
tmp, (char *) NULL);
|
409 |
break;
|
410 |
}
|
411 |
case TK_ARGV_FLOAT: {
|
412 |
sprintf(tmp, "%g", *((double *) infoPtr->dst));
|
413 |
Tcl_AppendResult(interp, "\n\t\tDefault value: ",
|
414 |
tmp, (char *) NULL);
|
415 |
break;
|
416 |
}
|
417 |
case TK_ARGV_STRING: {
|
418 |
char *string;
|
419 |
|
420 |
string = *((char **) infoPtr->dst);
|
421 |
if (string != NULL) {
|
422 |
Tcl_AppendResult(interp, "\n\t\tDefault value: \"",
|
423 |
string, "\"", (char *) NULL);
|
424 |
}
|
425 |
break;
|
426 |
}
|
427 |
default: {
|
428 |
break;
|
429 |
}
|
430 |
}
|
431 |
}
|
432 |
|
433 |
if ((flags & TK_ARGV_NO_DEFAULTS) || (i > 0)) {
|
434 |
break;
|
435 |
}
|
436 |
Tcl_AppendResult(interp, "\nGeneric options for all commands:",
|
437 |
(char *) NULL);
|
438 |
}
|
439 |
}
|
440 |
|
441 |
|
442 |
/* $History: tkArgv.c $
|
443 |
*
|
444 |
* ***************** Version 1 *****************
|
445 |
* User: Dtashley Date: 1/02/01 Time: 2:19a
|
446 |
* Created in $/IjuScripter, IjuConsole/Source/Tk Base
|
447 |
* Initial check-in.
|
448 |
*/
|
449 |
|
450 |
/* End of TKARGV.C */ |