132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/********************************************************************
|
|
* *
|
|
* THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE. *
|
|
* USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS *
|
|
* GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
|
|
* IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
|
|
* *
|
|
* THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009 *
|
|
* by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
|
|
* *
|
|
********************************************************************
|
|
|
|
function:
|
|
last mod: $Id$
|
|
|
|
********************************************************************/
|
|
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
#include "internal.h"
|
|
|
|
|
|
|
|
/*This is more or less the same as strncasecmp, but that doesn't exist
|
|
everywhere, and this is a fairly trivial function, so we include it.
|
|
Note: We take advantage of the fact that we know _n is less than or equal to
|
|
the length of at least one of the strings.*/
|
|
static int oc_tagcompare(const char *_s1,const char *_s2,int _n){
|
|
int c;
|
|
for(c=0;c<_n;c++){
|
|
if(toupper(_s1[c])!=toupper(_s2[c]))return !0;
|
|
}
|
|
return _s1[c]!='=';
|
|
}
|
|
|
|
|
|
|
|
void th_info_init(th_info *_info){
|
|
memset(_info,0,sizeof(*_info));
|
|
_info->version_major=TH_VERSION_MAJOR;
|
|
_info->version_minor=TH_VERSION_MINOR;
|
|
_info->version_subminor=TH_VERSION_SUB;
|
|
_info->keyframe_granule_shift=6;
|
|
}
|
|
|
|
void th_info_clear(th_info *_info){
|
|
memset(_info,0,sizeof(*_info));
|
|
}
|
|
|
|
|
|
|
|
void th_comment_init(th_comment *_tc){
|
|
memset(_tc,0,sizeof(*_tc));
|
|
}
|
|
|
|
void th_comment_add(th_comment *_tc,const char *_comment){
|
|
char **user_comments;
|
|
int *comment_lengths;
|
|
int comment_len;
|
|
user_comments=_ogg_realloc(_tc->user_comments,
|
|
(_tc->comments+2)*sizeof(*_tc->user_comments));
|
|
if(user_comments==NULL)return;
|
|
_tc->user_comments=user_comments;
|
|
comment_lengths=_ogg_realloc(_tc->comment_lengths,
|
|
(_tc->comments+2)*sizeof(*_tc->comment_lengths));
|
|
if(comment_lengths==NULL)return;
|
|
_tc->comment_lengths=comment_lengths;
|
|
comment_len=strlen(_comment);
|
|
comment_lengths[_tc->comments]=comment_len;
|
|
user_comments[_tc->comments]=_ogg_malloc(comment_len+1);
|
|
if(user_comments[_tc->comments]==NULL)return;
|
|
memcpy(_tc->user_comments[_tc->comments],_comment,comment_len+1);
|
|
_tc->comments++;
|
|
_tc->user_comments[_tc->comments]=NULL;
|
|
}
|
|
|
|
void th_comment_add_tag(th_comment *_tc,const char *_tag,const char *_val){
|
|
char *comment;
|
|
int tag_len;
|
|
int val_len;
|
|
tag_len=strlen(_tag);
|
|
val_len=strlen(_val);
|
|
/*+2 for '=' and '\0'.*/
|
|
comment=_ogg_malloc(tag_len+val_len+2);
|
|
if(comment==NULL)return;
|
|
memcpy(comment,_tag,tag_len);
|
|
comment[tag_len]='=';
|
|
memcpy(comment+tag_len+1,_val,val_len+1);
|
|
th_comment_add(_tc,comment);
|
|
_ogg_free(comment);
|
|
}
|
|
|
|
char *th_comment_query(th_comment *_tc,const char *_tag,int _count){
|
|
long i;
|
|
int found;
|
|
int tag_len;
|
|
tag_len=strlen(_tag);
|
|
found=0;
|
|
for(i=0;i<_tc->comments;i++){
|
|
if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len)){
|
|
/*We return a pointer to the data, not a copy.*/
|
|
if(_count==found++)return _tc->user_comments[i]+tag_len+1;
|
|
}
|
|
}
|
|
/*Didn't find anything.*/
|
|
return NULL;
|
|
}
|
|
|
|
int th_comment_query_count(th_comment *_tc,const char *_tag){
|
|
long i;
|
|
int tag_len;
|
|
int count;
|
|
tag_len=strlen(_tag);
|
|
count=0;
|
|
for(i=0;i<_tc->comments;i++){
|
|
if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len))count++;
|
|
}
|
|
return count;
|
|
}
|
|
|
|
void th_comment_clear(th_comment *_tc){
|
|
if(_tc!=NULL){
|
|
long i;
|
|
for(i=0;i<_tc->comments;i++)_ogg_free(_tc->user_comments[i]);
|
|
_ogg_free(_tc->user_comments);
|
|
_ogg_free(_tc->comment_lengths);
|
|
_ogg_free(_tc->vendor);
|
|
memset(_tc,0,sizeof(*_tc));
|
|
}
|
|
}
|