1 /*
2 * Copyright (c) 1999-2000, Image Power, Inc. and the University of
3 * British Columbia.
4 * Copyright (c) 2001-2002 Michael David Adams.
5 * All rights reserved.
6 */
7
8 /* __START_OF_JASPER_LICENSE__
9 *
10 * JasPer License Version 2.0
11 *
12 * Copyright (c) 2001-2006 Michael David Adams
13 * Copyright (c) 1999-2000 Image Power, Inc.
14 * Copyright (c) 1999-2000 The University of British Columbia
15 *
16 * All rights reserved.
17 *
18 * Permission is hereby granted, free of charge, to any person (the
19 * "User") obtaining a copy of this software and associated documentation
20 * files (the "Software"), to deal in the Software without restriction,
21 * including without limitation the rights to use, copy, modify, merge,
22 * publish, distribute, and/or sell copies of the Software, and to permit
23 * persons to whom the Software is furnished to do so, subject to the
24 * following conditions:
25 *
26 * 1. The above copyright notices and this permission notice (which
27 * includes the disclaimer below) shall be included in all copies or
28 * substantial portions of the Software.
29 *
30 * 2. The name of a copyright holder shall not be used to endorse or
31 * promote products derived from the Software without specific prior
32 * written permission.
33 *
34 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
35 * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
36 * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
37 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
38 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
39 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
40 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
41 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
42 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
43 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
44 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
45 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
46 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
47 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
48 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
49 * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
50 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
51 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
52 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
53 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
54 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
55 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
56 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
57 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
58 * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
59 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
60 *
61 * __END_OF_JASPER_LICENSE__
62 */
63
64 /*
65 * Command Line Option Parsing Library
66 *
67 * $Id: jas_getopt.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
68 */
69
70 /******************************************************************************\
71 * Includes.
72 \******************************************************************************/
73
74 #include <stdio.h>
75 #include <string.h>
76
77 #include "jasper/jas_getopt.h"
78 #include "jasper/jas_math.h"
79
80 /******************************************************************************\
81 * Global data.
82 \******************************************************************************/
83
84 int jas_optind = 0;
85 int jas_opterr = 1;
86 char *jas_optarg = 0;
87
88 /******************************************************************************\
89 * Code.
90 \******************************************************************************/
91
jas_optlookup(jas_opt_t * opts,char * name)92 static jas_opt_t *jas_optlookup(jas_opt_t *opts, char *name)
93 {
94 jas_opt_t *opt;
95
96 for (opt = opts; opt->id >= 0 && opt->name; ++opt) {
97 if (!strcmp(opt->name, name)) {
98 return opt;
99 }
100 }
101 return 0;
102 }
103
jas_getopt(int argc,char ** argv,jas_opt_t * opts)104 int jas_getopt(int argc, char **argv, jas_opt_t *opts)
105 {
106 char *cp;
107 int id;
108 int hasarg;
109 jas_opt_t *opt;
110 char *s;
111
112 if (!jas_optind) {
113 jas_optind = JAS_MIN(1, argc);
114 }
115 while (jas_optind < argc) {
116 s = cp = argv[jas_optind];
117 if (*cp == '-') {
118 /* We are processing an option. */
119 ++jas_optind;
120 if (*++cp == '-') {
121 /* We are processing a long option. */
122 ++cp;
123 if (*cp == '\0') {
124 /* This is the end of the options. */
125 return JAS_GETOPT_EOF;
126 }
127 if (!(opt = jas_optlookup(opts, cp))) {
128 if (jas_opterr) {
129 jas_eprintf("unknown long option %s\n", s);
130 }
131 return JAS_GETOPT_ERR;
132 }
133 hasarg = (opt->flags & JAS_OPT_HASARG) != 0;
134 id = opt->id;
135 } else {
136 /* We are processing a short option. */
137 if (strlen(cp) != 1 ||
138 !(opt = jas_optlookup(opts, cp))) {
139 if (jas_opterr) {
140 jas_eprintf("unknown short option %s\n", s);
141 }
142 return JAS_GETOPT_ERR;
143 }
144 hasarg = (opt->flags & JAS_OPT_HASARG) != 0;
145 id = opt->id;
146 }
147 if (hasarg) {
148 /* The option has an argument. */
149 if (jas_optind >= argc) {
150 if (jas_opterr) {
151 jas_eprintf("missing argument for option %s\n", s);
152 }
153 return JAS_GETOPT_ERR;
154 }
155 jas_optarg = argv[jas_optind];
156 ++jas_optind;
157 } else {
158 /* The option does not have an argument. */
159 jas_optarg = 0;
160 }
161 return id;
162 } else {
163 /* We are not processing an option. */
164 return JAS_GETOPT_EOF;
165 }
166 }
167 return JAS_GETOPT_EOF;
168 }
169