| 1 |
/* $Header$ */
|
| 2 |
|
| 3 |
/*
|
| 4 |
* tkArgv.c --
|
| 5 |
*
|
| 6 |
* This file contains a procedure that handles table-based
|
| 7 |
* argv-argc parsing.
|
| 8 |
*
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| 9 |
* Copyright (c) 1990-1994 The Regents of the University of California.
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| 10 |
* Copyright (c) 1994-1997 Sun Microsystems, Inc.
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| 11 |
*
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| 12 |
* See the file "license.terms" for information on usage and redistribution
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| 13 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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| 14 |
*
|
| 15 |
* RCS: @(#) $Id: tkargv.c,v 1.1.1.1 2001/06/13 04:53:35 dtashley Exp $
|
| 16 |
*/
|
| 17 |
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| 18 |
#include "tkPort.h"
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| 19 |
#include "tk.h"
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| 20 |
|
| 21 |
/*
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| 22 |
* Default table of argument descriptors. These are normally available
|
| 23 |
* in every application.
|
| 24 |
*/
|
| 25 |
|
| 26 |
static Tk_ArgvInfo defaultTable[] = {
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| 27 |
{"-help", TK_ARGV_HELP, (char *) NULL, (char *) NULL,
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| 28 |
"Print summary of command-line options and abort"},
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| 29 |
{NULL, TK_ARGV_END, (char *) NULL, (char *) NULL,
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| 30 |
(char *) NULL}
|
| 31 |
};
|
| 32 |
|
| 33 |
/*
|
| 34 |
* Forward declarations for procedures defined in this file:
|
| 35 |
*/
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| 36 |
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| 37 |
static void PrintUsage _ANSI_ARGS_((Tcl_Interp *interp,
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| 38 |
Tk_ArgvInfo *argTable, int flags));
|
| 39 |
|
| 40 |
/*
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| 41 |
*----------------------------------------------------------------------
|
| 42 |
*
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| 43 |
* Tk_ParseArgv --
|
| 44 |
*
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| 45 |
* Process an argv array according to a table of expected
|
| 46 |
* command-line options. See the manual page for more details.
|
| 47 |
*
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| 48 |
* Results:
|
| 49 |
* The return value is a standard Tcl return value. If an
|
| 50 |
* error occurs then an error message is left in the interp's result.
|
| 51 |
* Under normal conditions, both *argcPtr and *argv are modified
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| 52 |
* to return the arguments that couldn't be processed here (they
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| 53 |
* didn't match the option table, or followed an TK_ARGV_REST
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| 54 |
* argument).
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| 55 |
*
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| 56 |
* Side effects:
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| 57 |
* Variables may be modified, resources may be entered for tkwin,
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| 58 |
* or procedures may be called. It all depends on the arguments
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| 59 |
* and their entries in argTable. See the user documentation
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* for details.
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*
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| 62 |
*----------------------------------------------------------------------
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| 63 |
*/
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| 64 |
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| 65 |
int
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| 66 |
Tk_ParseArgv(interp, tkwin, argcPtr, argv, argTable, flags)
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| 67 |
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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| 73 |
* 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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| 80 |
* table of argument descriptions. */
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| 81 |
Tk_ArgvInfo *matchPtr; /* Descriptor that matches current argument. */
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| 82 |
char *curArg; /* Current argument */
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register char c; /* Second character of current arg (used for
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| 84 |
* quick check for matching; use 2nd char.
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| 85 |
* because first char. will almost always
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| 86 |
* be '-'). */
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| 87 |
int srcIndex; /* Location from which to read next argument
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| 88 |
* from argv. */
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| 89 |
int dstIndex; /* Index into argv to which next unused
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| 90 |
* argument should be copied (never greater
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| 91 |
* than srcIndex). */
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| 92 |
int argc; /* # arguments in argv still to process. */
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| 93 |
size_t length; /* Number of characters in current argument. */
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| 94 |
int i;
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| 95 |
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| 96 |
if (flags & TK_ARGV_DONT_SKIP_FIRST_ARG) {
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| 97 |
srcIndex = dstIndex = 0;
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argc = *argcPtr;
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| 99 |
} else {
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srcIndex = dstIndex = 1;
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argc = *argcPtr-1;
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| 102 |
}
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| 103 |
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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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| 108 |
length = strlen(curArg);
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if (length > 0) {
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c = curArg[1];
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| 111 |
} else {
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c = 0;
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}
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| 114 |
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| 115 |
/*
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| 116 |
* Loop throught the argument descriptors searching for one with
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| 117 |
* the matching key string. If found, leave a pointer to it in
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| 118 |
* matchPtr.
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| 119 |
*/
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| 120 |
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| 121 |
matchPtr = NULL;
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| 122 |
for (i = 0; i < 2; i++) {
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| 123 |
if (i == 0) {
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| 124 |
infoPtr = argTable;
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| 125 |
} else {
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| 126 |
infoPtr = defaultTable;
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| 127 |
}
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| 128 |
for (; (infoPtr != NULL) && (infoPtr->type != TK_ARGV_END);
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| 129 |
infoPtr++) {
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| 130 |
if (infoPtr->key == NULL) {
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| 131 |
continue;
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| 132 |
}
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| 133 |
if ((infoPtr->key[1] != c)
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| 134 |
|| (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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| 140 |
|| (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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| 144 |
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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| 191 |
*((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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| 263 |
if (argc < 0) {
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| 264 |
return TCL_ERROR;
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| 265 |
}
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break;
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| 267 |
}
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case TK_ARGV_HELP:
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| 269 |
PrintUsage (interp, argTable, flags);
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return TCL_ERROR;
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case TK_ARGV_CONST_OPTION:
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| 272 |
Tk_AddOption(tkwin, infoPtr->dst, infoPtr->src,
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TK_INTERACTIVE_PRIO);
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| 274 |
break;
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| 275 |
case TK_ARGV_OPTION_VALUE:
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| 276 |
if (argc < 1) {
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| 277 |
goto missingArg;
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| 278 |
}
|
| 279 |
Tk_AddOption(tkwin, infoPtr->dst, argv[srcIndex],
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| 280 |
TK_INTERACTIVE_PRIO);
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| 281 |
srcIndex++;
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| 282 |
argc--;
|
| 283 |
break;
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| 284 |
case TK_ARGV_OPTION_NAME_VALUE:
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| 285 |
if (argc < 2) {
|
| 286 |
Tcl_AppendResult(interp, "\"", curArg,
|
| 287 |
"\" option requires two following arguments",
|
| 288 |
(char *) NULL);
|
| 289 |
return TCL_ERROR;
|
| 290 |
}
|
| 291 |
Tk_AddOption(tkwin, argv[srcIndex], argv[srcIndex+1],
|
| 292 |
TK_INTERACTIVE_PRIO);
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| 293 |
srcIndex += 2;
|
| 294 |
argc -= 2;
|
| 295 |
break;
|
| 296 |
default: {
|
| 297 |
char buf[64 + TCL_INTEGER_SPACE];
|
| 298 |
|
| 299 |
sprintf(buf, "bad argument type %d in Tk_ArgvInfo",
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| 300 |
infoPtr->type);
|
| 301 |
Tcl_SetResult(interp, buf, TCL_VOLATILE);
|
| 302 |
return TCL_ERROR;
|
| 303 |
}
|
| 304 |
}
|
| 305 |
}
|
| 306 |
|
| 307 |
/*
|
| 308 |
* If we broke out of the loop because of an OPT_REST argument,
|
| 309 |
* copy the remaining arguments down.
|
| 310 |
*/
|
| 311 |
|
| 312 |
argsDone:
|
| 313 |
while (argc) {
|
| 314 |
argv[dstIndex] = argv[srcIndex];
|
| 315 |
srcIndex++;
|
| 316 |
dstIndex++;
|
| 317 |
argc--;
|
| 318 |
}
|
| 319 |
argv[dstIndex] = (char *) NULL;
|
| 320 |
*argcPtr = dstIndex;
|
| 321 |
return TCL_OK;
|
| 322 |
|
| 323 |
missingArg:
|
| 324 |
Tcl_AppendResult(interp, "\"", curArg,
|
| 325 |
"\" option requires an additional argument", (char *) NULL);
|
| 326 |
return TCL_ERROR;
|
| 327 |
}
|
| 328 |
|
| 329 |
/*
|
| 330 |
*----------------------------------------------------------------------
|
| 331 |
*
|
| 332 |
* PrintUsage --
|
| 333 |
*
|
| 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
|
| 338 |
* describing all the options in argTable, plus all those
|
| 339 |
* in the default table unless TK_ARGV_NO_DEFAULTS is
|
| 340 |
* specified in flags.
|
| 341 |
*
|
| 342 |
* Side effects:
|
| 343 |
* None.
|
| 344 |
*
|
| 345 |
*----------------------------------------------------------------------
|
| 346 |
*/
|
| 347 |
|
| 348 |
static void
|
| 349 |
PrintUsage(interp, argTable, flags)
|
| 350 |
Tcl_Interp *interp; /* Place information in this interp's
|
| 351 |
* result area. */
|
| 352 |
Tk_ArgvInfo *argTable; /* Array of command-specific argument
|
| 353 |
* descriptions. */
|
| 354 |
int flags; /* If the TK_ARGV_NO_DEFAULTS bit is set
|
| 355 |
* in this word, then don't generate
|
| 356 |
* information for default options. */
|
| 357 |
{
|
| 358 |
register Tk_ArgvInfo *infoPtr;
|
| 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;
|
| 372 |
infoPtr->type != TK_ARGV_END; infoPtr++) {
|
| 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 |
/* End of tkargv.c */
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