jas_tvp.h

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/*
 * Copyright (c) 2001-2002 Michael David Adams.
 * All rights reserved.
 */
 
/* __START_OF_JASPER_LICENSE__
 * 
 * JasPer License Version 2.0
 * 
 * Copyright (c) 2001-2006 Michael David Adams
 * Copyright (c) 1999-2000 Image Power, Inc.
 * Copyright (c) 1999-2000 The University of British Columbia
 * 
 * All rights reserved.
 * 
 * Permission is hereby granted, free of charge, to any person (the
 * "User") obtaining a copy of this software and associated documentation
 * files (the "Software"), to deal in the Software without restriction,
 * including without limitation the rights to use, copy, modify, merge,
 * publish, distribute, and/or sell copies of the Software, and to permit
 * persons to whom the Software is furnished to do so, subject to the
 * following conditions:
 * 
 * 1.  The above copyright notices and this permission notice (which
 * includes the disclaimer below) shall be included in all copies or
 * substantial portions of the Software.
 * 
 * 2.  The name of a copyright holder shall not be used to endorse or
 * promote products derived from the Software without specific prior
 * written permission.
 * 
 * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
 * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
 * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
 * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
 * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
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 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
 * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
 * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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 * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
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 * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
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 * 
 * __END_OF_JASPER_LICENSE__
 */
 
#ifndef JAS_TVP_H
#define JAS_TVP_H
 
/******************************************************************************\
* Includes.
\******************************************************************************/
 
/* The configuration header file should be included first. */
#include <jasper/jas_config.h>
 
#ifdef __cplusplus
extern "C" {
#endif
 
/******************************************************************************\
* Types.
\******************************************************************************/
 
/* Tag information type. */
 
typedef struct {
 
        int id;
        /* The ID for the tag. */
 
        const char *name;
        /* The name of the tag. */
 
} jas_taginfo_t;
 
/* Tag-value parser type. */
 
typedef struct {
 
        char *buf;
        /* The parsing buffer. */
 
        char *tag;
        /* The current tag name. */
 
        const char *val;
        /* The current value. */
 
        char *pos;
        /* The current position in the parsing buffer. */
 
} jas_tvparser_t;
 
/******************************************************************************\
* Tag information functions.
\******************************************************************************/
 
/* Lookup a tag by name. */
JAS_ATTRIBUTE_PURE
JAS_DLLEXPORT const jas_taginfo_t *jas_taginfos_lookup(const jas_taginfo_t *taginfos, const char *name);
 
/* This function returns a pointer to the specified taginfo object if it
  exists (i.e., the pointer is nonnull); otherwise, a pointer to a dummy
  object is returned.  This is useful in some situations to avoid checking
  for a null pointer. */
JAS_ATTRIBUTE_PURE
JAS_DLLEXPORT const jas_taginfo_t *jas_taginfo_nonull(const jas_taginfo_t *taginfo);
 
/******************************************************************************\
* Tag-value parser functions.
\******************************************************************************/
 
/* Create a tag-value parser for the specified string. */
JAS_DLLEXPORT jas_tvparser_t *jas_tvparser_create(const char *s);
 
/* Destroy a tag-value parser. */
JAS_DLLEXPORT void jas_tvparser_destroy(jas_tvparser_t *tvparser);
 
/* Get the next tag-value pair. */
JAS_DLLEXPORT int jas_tvparser_next(jas_tvparser_t *tvparser);
 
/* Get the tag name for the current tag-value pair. */
JAS_ATTRIBUTE_PURE
JAS_DLLEXPORT const char *jas_tvparser_gettag(const jas_tvparser_t *tvparser);
 
/* Get the value for the current tag-value pair. */
JAS_ATTRIBUTE_PURE
JAS_DLLEXPORT const char *jas_tvparser_getval(const jas_tvparser_t *tvparser);
 
#ifdef __cplusplus
}
#endif
 
#endif