2 * Copyright (c) 2001-2002 Michael David Adams.
6 /* __START_OF_JASPER_LICENSE__
8 * JasPer License Version 2.0
10 * Copyright (c) 1999-2000 Image Power, Inc.
11 * Copyright (c) 1999-2000 The University of British Columbia
12 * Copyright (c) 2001-2003 Michael David Adams
14 * All rights reserved.
16 * Permission is hereby granted, free of charge, to any person (the
17 * "User") obtaining a copy of this software and associated documentation
18 * files (the "Software"), to deal in the Software without restriction,
19 * including without limitation the rights to use, copy, modify, merge,
20 * publish, distribute, and/or sell copies of the Software, and to permit
21 * persons to whom the Software is furnished to do so, subject to the
22 * following conditions:
24 * 1. The above copyright notices and this permission notice (which
25 * includes the disclaimer below) shall be included in all copies or
26 * substantial portions of the Software.
28 * 2. The name of a copyright holder shall not be used to endorse or
29 * promote products derived from the Software without specific prior
32 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
33 * LICENSE. NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
34 * THIS DISCLAIMER. THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
35 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
36 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
37 * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
38 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
39 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
40 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
41 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
42 * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
43 * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
44 * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
45 * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
46 * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
47 * PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
48 * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
49 * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
50 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
51 * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
52 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
53 * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
54 * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
55 * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
56 * RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
57 * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
59 * __END_OF_JASPER_LICENSE__
63 * Tag-Value Parser Library
65 * $Id: jas_tvp.c,v 1.1 2005/05/22 18:32:59 malaterre Exp $
68 /******************************************************************************\
70 \******************************************************************************/
77 #include "jasper/jas_malloc.h"
78 #include "jasper/jas_string.h"
79 #include "jasper/jas_tvp.h"
81 /******************************************************************************\
83 \******************************************************************************/
85 /* Is the specified character valid for a tag name? */
86 #define JAS_TVP_ISTAG(x) \
87 (isalpha(x) || (x) == '_' || isdigit(x))
89 /******************************************************************************\
90 * Code for creating and destroying a tag-value parser.
91 \******************************************************************************/
93 jas_tvparser_t *jas_tvparser_create(const char *s)
96 if (!(tvp = jas_malloc(sizeof(jas_tvparser_t)))) {
99 if (!(tvp->buf = jas_strdup(s))) {
100 jas_tvparser_destroy(tvp);
109 void jas_tvparser_destroy(jas_tvparser_t *tvp)
117 /******************************************************************************\
119 \******************************************************************************/
121 /* Get the next tag-value pair. */
122 int jas_tvparser_next(jas_tvparser_t *tvp)
128 /* Skip any leading whitespace. */
130 while (*p != '\0' && isspace(*p)) {
134 /* Has the end of the input data been reached? */
136 /* No more tags are present. */
141 /* Does the tag name begin with a valid character? */
142 if (!JAS_TVP_ISTAG(*p)) {
146 /* Remember where the tag name begins. */
149 /* Find the end of the tag name. */
150 while (*p != '\0' && JAS_TVP_ISTAG(*p)) {
154 /* Has the end of the input data been reached? */
156 /* The value field is empty. */
163 /* Is a value field not present? */
165 if (*p != '\0' && !isspace(*p)) {
178 while (*p != '\0' && !isspace(*p)) {
193 /******************************************************************************\
194 * Code for querying the current tag/value.
195 \******************************************************************************/
197 /* Get the current tag. */
198 char *jas_tvparser_gettag(jas_tvparser_t *tvp)
203 /* Get the current value. */
204 char *jas_tvparser_getval(jas_tvparser_t *tvp)
209 /******************************************************************************\
210 * Miscellaneous code.
211 \******************************************************************************/
213 /* Lookup a tag by name. */
214 jas_taginfo_t *jas_taginfos_lookup(jas_taginfo_t *taginfos, const char *name)
216 jas_taginfo_t *taginfo;
218 while (taginfo->id >= 0) {
219 if (!strcmp(taginfo->name, name)) {
227 /* This function is simply for convenience. */
228 /* One can avoid testing for the special case of a null pointer, by
229 using this function. This function never returns a null pointer. */
230 jas_taginfo_t *jas_taginfo_nonull(jas_taginfo_t *taginfo)
232 static jas_taginfo_t invalidtaginfo = {
236 return taginfo ? taginfo : &invalidtaginfo;