getopt.c
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上传日期:2007-06-06
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文件大小:3k
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: RCSL 1.0/RPSL 1.0
- *
- * Portions Copyright (c) 1995-2002 RealNetworks, Inc. All Rights Reserved.
- *
- * The contents of this file, and the files included with this file, are
- * subject to the current version of the RealNetworks Public Source License
- * Version 1.0 (the "RPSL") available at
- * http://www.helixcommunity.org/content/rpsl unless you have licensed
- * the file under the RealNetworks Community Source License Version 1.0
- * (the "RCSL") available at http://www.helixcommunity.org/content/rcsl,
- * in which case the RCSL will apply. You may also obtain the license terms
- * directly from RealNetworks. You may not use this file except in
- * compliance with the RPSL or, if you have a valid RCSL with RealNetworks
- * applicable to this file, the RCSL. Please see the applicable RPSL or
- * RCSL for the rights, obligations and limitations governing use of the
- * contents of the file.
- *
- * This file is part of the Helix DNA Technology. RealNetworks is the
- * developer of the Original Code and owns the copyrights in the portions
- * it created.
- *
- * This file, and the files included with this file, is distributed and made
- * available on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND REALNETWORKS HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, FITNESS
- * FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- *
- * Technology Compatibility Kit Test Suite(s) Location:
- * http://www.helixcommunity.org/content/tck
- *
- * Contributor(s):
- *
- * ***** END LICENSE BLOCK ***** */
- #include "hlxclib/stdio.h"
- #include "hlxclib/string.h"
- char *optarg; /* Global argument pointer. */
- int optind = 0; /* Global argv index. */
- static char *scan = NULL; /* Private scan pointer. */
- int
- getopt(int argc, char * const * argv, const char *optstring)
- {
- register char c;
- register char *place;
- optarg = NULL;
- if (scan == NULL || *scan == ' ') {
- if (optind == 0)
- optind++;
-
- if (optind >= argc || argv[optind][0] != '-' || argv[optind][1] == ' ')
- return(EOF);
- if (strcmp(argv[optind], "--")==0) {
- optind++;
- return(EOF);
- }
-
- scan = argv[optind]+1;
- optind++;
- }
- c = *scan++;
- place = strchr(optstring, c);
- if (place == NULL || c == ':') {
- fprintf(stderr, "%s: unknown option -%cn", argv[0], c);
- return('?');
- }
- place++;
- if (*place == ':') {
- if (*scan != ' ') {
- optarg = scan;
- scan = NULL;
- } else if (optind < argc) {
- optarg = argv[optind];
- optind++;
- } else {
- fprintf(stderr, "%s: -%c argument missingn", argv[0], c);
- return('?');
- }
- }
- return(c);
- }