238 lines
6.8 KiB
C
238 lines
6.8 KiB
C
/*
|
|
* 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
|
|
* PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN NO
|
|
* 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
|
|
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. NO ASSURANCES ARE
|
|
* PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
|
|
* THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
|
|
* EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
|
|
* BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
|
|
* PROPERTY RIGHTS OR OTHERWISE. AS A CONDITION TO EXERCISING THE RIGHTS
|
|
* GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
|
|
* ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY. THE SOFTWARE
|
|
* IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
|
|
* SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
|
|
* AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
|
|
* SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
|
|
* THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
|
|
* PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
|
|
* RISK ACTIVITIES"). THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
|
|
* EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
|
|
*
|
|
* __END_OF_JASPER_LICENSE__
|
|
*/
|
|
|
|
/*
|
|
* Tag-Value Parser Library
|
|
*
|
|
* $Id: jas_tvp.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
|
|
*/
|
|
|
|
/******************************************************************************\
|
|
* Includes.
|
|
\******************************************************************************/
|
|
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <stdlib.h>
|
|
|
|
#include "jasper/jas_malloc.h"
|
|
#include "jasper/jas_string.h"
|
|
#include "jasper/jas_tvp.h"
|
|
|
|
/******************************************************************************\
|
|
* Macros.
|
|
\******************************************************************************/
|
|
|
|
/* Is the specified character valid for a tag name? */
|
|
#define JAS_TVP_ISTAG(x) \
|
|
(isalpha(x) || (x) == '_' || isdigit(x))
|
|
|
|
/******************************************************************************\
|
|
* Code for creating and destroying a tag-value parser.
|
|
\******************************************************************************/
|
|
|
|
jas_tvparser_t *jas_tvparser_create(const char *s)
|
|
{
|
|
jas_tvparser_t *tvp;
|
|
if (!(tvp = jas_malloc(sizeof(jas_tvparser_t)))) {
|
|
return 0;
|
|
}
|
|
if (!(tvp->buf = jas_strdup(s))) {
|
|
jas_tvparser_destroy(tvp);
|
|
return 0;
|
|
}
|
|
tvp->pos = tvp->buf;
|
|
tvp->tag = 0;
|
|
tvp->val = 0;
|
|
return tvp;
|
|
}
|
|
|
|
void jas_tvparser_destroy(jas_tvparser_t *tvp)
|
|
{
|
|
if (tvp->buf) {
|
|
jas_free(tvp->buf);
|
|
}
|
|
jas_free(tvp);
|
|
}
|
|
|
|
/******************************************************************************\
|
|
* Main parsing code.
|
|
\******************************************************************************/
|
|
|
|
/* Get the next tag-value pair. */
|
|
int jas_tvparser_next(jas_tvparser_t *tvp)
|
|
{
|
|
char *p;
|
|
char *tag;
|
|
char *val;
|
|
|
|
/* Skip any leading whitespace. */
|
|
p = tvp->pos;
|
|
while (*p != '\0' && isspace(*p)) {
|
|
++p;
|
|
}
|
|
|
|
/* Has the end of the input data been reached? */
|
|
if (*p == '\0') {
|
|
/* No more tags are present. */
|
|
tvp->pos = p;
|
|
return 1;
|
|
}
|
|
|
|
/* Does the tag name begin with a valid character? */
|
|
if (!JAS_TVP_ISTAG(*p)) {
|
|
return -1;
|
|
}
|
|
|
|
/* Remember where the tag name begins. */
|
|
tag = p;
|
|
|
|
/* Find the end of the tag name. */
|
|
while (*p != '\0' && JAS_TVP_ISTAG(*p)) {
|
|
++p;
|
|
}
|
|
|
|
/* Has the end of the input data been reached? */
|
|
if (*p == '\0') {
|
|
/* The value field is empty. */
|
|
tvp->tag = tag;
|
|
tvp->val = "";
|
|
tvp->pos = p;
|
|
return 0;
|
|
}
|
|
|
|
/* Is a value field not present? */
|
|
if (*p != '=') {
|
|
if (*p != '\0' && !isspace(*p)) {
|
|
return -1;
|
|
}
|
|
*p++ = '\0';
|
|
tvp->tag = tag;
|
|
tvp->val = "";
|
|
tvp->pos = p;
|
|
return 0;
|
|
}
|
|
|
|
*p++ = '\0';
|
|
|
|
val = p;
|
|
while (*p != '\0' && !isspace(*p)) {
|
|
++p;
|
|
}
|
|
|
|
if (*p != '\0') {
|
|
*p++ = '\0';
|
|
}
|
|
|
|
tvp->pos = p;
|
|
tvp->tag = tag;
|
|
tvp->val = val;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************\
|
|
* Code for querying the current tag/value.
|
|
\******************************************************************************/
|
|
|
|
/* Get the current tag. */
|
|
char *jas_tvparser_gettag(jas_tvparser_t *tvp)
|
|
{
|
|
return tvp->tag;
|
|
}
|
|
|
|
/* Get the current value. */
|
|
char *jas_tvparser_getval(jas_tvparser_t *tvp)
|
|
{
|
|
return tvp->val;
|
|
}
|
|
|
|
/******************************************************************************\
|
|
* Miscellaneous code.
|
|
\******************************************************************************/
|
|
|
|
/* Lookup a tag by name. */
|
|
jas_taginfo_t *jas_taginfos_lookup(jas_taginfo_t *taginfos, const char *name)
|
|
{
|
|
jas_taginfo_t *taginfo;
|
|
taginfo = taginfos;
|
|
while (taginfo->id >= 0) {
|
|
if (!strcmp(taginfo->name, name)) {
|
|
return taginfo;
|
|
}
|
|
++taginfo;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/* This function is simply for convenience. */
|
|
/* One can avoid testing for the special case of a null pointer, by
|
|
using this function. This function never returns a null pointer. */
|
|
jas_taginfo_t *jas_taginfo_nonull(jas_taginfo_t *taginfo)
|
|
{
|
|
static jas_taginfo_t invalidtaginfo = {
|
|
-1, 0
|
|
};
|
|
|
|
return taginfo ? taginfo : &invalidtaginfo;
|
|
}
|