JasPer 2.0.33
jas_tvp.h
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1/*
2 * Copyright (c) 2001-2002 Michael David Adams.
3 * All rights reserved.
4 */
5
6/* __START_OF_JASPER_LICENSE__
7 *
8 * JasPer License Version 2.0
9 *
10 * Copyright (c) 2001-2006 Michael David Adams
11 * Copyright (c) 1999-2000 Image Power, Inc.
12 * Copyright (c) 1999-2000 The University of British Columbia
13 *
14 * All rights reserved.
15 *
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58 *
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60 */
61
67#ifndef JAS_TVP_H
68#define JAS_TVP_H
69
70/******************************************************************************\
71* Includes.
72\******************************************************************************/
73
74/* The configuration header file should be included first. */
75#include <jasper/jas_config.h>
76
77#ifdef __cplusplus
78extern "C" {
79#endif
80
81/******************************************************************************\
82* Types.
83\******************************************************************************/
84
85/* Tag information type. */
86
87typedef struct {
88
89 int id;
90 /* The ID for the tag. */
91
92 const char *name;
93 /* The name of the tag. */
94
95} jas_taginfo_t;
96
97/* Tag-value parser type. */
98
99typedef struct {
100
101 char *buf;
102 /* The parsing buffer. */
103
104 char *tag;
105 /* The current tag name. */
106
107 const char *val;
108 /* The current value. */
109
110 char *pos;
111 /* The current position in the parsing buffer. */
112
113} jas_tvparser_t;
114
115/******************************************************************************\
116* Tag information functions.
117\******************************************************************************/
118
119/* Lookup a tag by name. */
120JAS_ATTRIBUTE_PURE
121JAS_DLLEXPORT const jas_taginfo_t *jas_taginfos_lookup(const jas_taginfo_t *taginfos, const char *name);
122
123/* This function returns a pointer to the specified taginfo object if it
124 exists (i.e., the pointer is nonnull); otherwise, a pointer to a dummy
125 object is returned. This is useful in some situations to avoid checking
126 for a null pointer. */
127JAS_ATTRIBUTE_PURE
128JAS_DLLEXPORT const jas_taginfo_t *jas_taginfo_nonull(const jas_taginfo_t *taginfo);
129
130/******************************************************************************\
131* Tag-value parser functions.
132\******************************************************************************/
133
134/* Create a tag-value parser for the specified string. */
135JAS_DLLEXPORT jas_tvparser_t *jas_tvparser_create(const char *s);
136
137/* Destroy a tag-value parser. */
138JAS_DLLEXPORT void jas_tvparser_destroy(jas_tvparser_t *tvparser);
139
140/* Get the next tag-value pair. */
141JAS_DLLEXPORT int jas_tvparser_next(jas_tvparser_t *tvparser);
142
143/* Get the tag name for the current tag-value pair. */
144JAS_ATTRIBUTE_PURE
145JAS_DLLEXPORT const char *jas_tvparser_gettag(const jas_tvparser_t *tvparser);
146
147/* Get the value for the current tag-value pair. */
148JAS_ATTRIBUTE_PURE
149JAS_DLLEXPORT const char *jas_tvparser_getval(const jas_tvparser_t *tvparser);
150
151#ifdef __cplusplus
152}
153#endif
154
155#endif