Line data    Source code

       1             : /********************************************************************
       2             :  *                                                                  *
       3             :  * THIS FILE IS PART OF THE OggTheora SOFTWARE CODEC SOURCE CODE.   *
       4             :  * USE, DISTRIBUTION AND REPRODUCTION OF THIS LIBRARY SOURCE IS     *
       5             :  * GOVERNED BY A BSD-STYLE SOURCE LICENSE INCLUDED WITH THIS SOURCE *
       6             :  * IN 'COPYING'. PLEASE READ THESE TERMS BEFORE DISTRIBUTING.       *
       7             :  *                                                                  *
       8             :  * THE Theora SOURCE CODE IS COPYRIGHT (C) 2002-2009                *
       9             :  * by the Xiph.Org Foundation and contributors http://www.xiph.org/ *
      10             :  *                                                                  *
      11             :  ********************************************************************
      12             : 
      13             :   function:
      14             :     last mod: $Id: info.c 16503 2009-08-22 18:14:02Z giles $
      15             : 
      16             :  ********************************************************************/
      17             : 
      18             : #include <stdlib.h>
      19             : #include <ctype.h>
      20             : #include <string.h>
      21             : #include "internal.h"
      22             : 
      23             : 
      24             : 
      25             : /*This is more or less the same as strncasecmp, but that doesn't exist
      26             :    everywhere, and this is a fairly trivial function, so we include it.
      27             :   Note: We take advantage of the fact that we know _n is less than or equal to
      28             :    the length of at least one of the strings.*/
      29           0 : static int oc_tagcompare(const char *_s1,const char *_s2,int _n){
      30             :   int c;
      31           0 :   for(c=0;c<_n;c++){
      32           0 :     if(toupper(_s1[c])!=toupper(_s2[c]))return !0;
      33             :   }
      34           0 :   return _s1[c]!='=';
      35             : }
      36             : 
      37             : 
      38             : 
      39           0 : void th_info_init(th_info *_info){
      40           0 :   memset(_info,0,sizeof(*_info));
      41           0 :   _info->version_major=TH_VERSION_MAJOR;
      42           0 :   _info->version_minor=TH_VERSION_MINOR;
      43           0 :   _info->version_subminor=TH_VERSION_SUB;
      44           0 :   _info->keyframe_granule_shift=6;
      45           0 : }
      46             : 
      47           0 : void th_info_clear(th_info *_info){
      48           0 :   memset(_info,0,sizeof(*_info));
      49           0 : }
      50             : 
      51             : 
      52             : 
      53           0 : void th_comment_init(th_comment *_tc){
      54           0 :   memset(_tc,0,sizeof(*_tc));
      55           0 : }
      56             : 
      57           0 : void th_comment_add(th_comment *_tc,char *_comment){
      58             :   char **user_comments;
      59             :   int   *comment_lengths;
      60             :   int    comment_len;
      61           0 :   user_comments=_ogg_realloc(_tc->user_comments,
      62           0 :    (_tc->comments+2)*sizeof(*_tc->user_comments));
      63           0 :   if(user_comments==NULL)return;
      64           0 :   _tc->user_comments=user_comments;
      65           0 :   comment_lengths=_ogg_realloc(_tc->comment_lengths,
      66           0 :    (_tc->comments+2)*sizeof(*_tc->comment_lengths));
      67           0 :   if(comment_lengths==NULL)return;
      68           0 :   _tc->comment_lengths=comment_lengths;
      69           0 :   comment_len=strlen(_comment);
      70           0 :   comment_lengths[_tc->comments]=comment_len;
      71           0 :   user_comments[_tc->comments]=_ogg_malloc(comment_len+1);
      72           0 :   if(user_comments[_tc->comments]==NULL)return;
      73           0 :   memcpy(_tc->user_comments[_tc->comments],_comment,comment_len+1);
      74           0 :   _tc->comments++;
      75           0 :   _tc->user_comments[_tc->comments]=NULL;
      76             : }
      77             : 
      78           0 : void th_comment_add_tag(th_comment *_tc,char *_tag,char *_val){
      79             :   char *comment;
      80             :   int   tag_len;
      81             :   int   val_len;
      82           0 :   tag_len=strlen(_tag);
      83           0 :   val_len=strlen(_val);
      84             :   /*+2 for '=' and '\0'.*/
      85           0 :   comment=_ogg_malloc(tag_len+val_len+2);
      86           0 :   if(comment==NULL)return;
      87           0 :   memcpy(comment,_tag,tag_len);
      88           0 :   comment[tag_len]='=';
      89           0 :   memcpy(comment+tag_len+1,_val,val_len+1);
      90           0 :   th_comment_add(_tc,comment);
      91           0 :   _ogg_free(comment);
      92             : }
      93             : 
      94           0 : char *th_comment_query(th_comment *_tc,char *_tag,int _count){
      95             :   long i;
      96             :   int  found;
      97             :   int  tag_len;
      98           0 :   tag_len=strlen(_tag);
      99           0 :   found=0;
     100           0 :   for(i=0;i<_tc->comments;i++){
     101           0 :     if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len)){
     102             :       /*We return a pointer to the data, not a copy.*/
     103           0 :       if(_count==found++)return _tc->user_comments[i]+tag_len+1;
     104             :     }
     105             :   }
     106             :   /*Didn't find anything.*/
     107           0 :   return NULL;
     108             : }
     109             : 
     110           0 : int th_comment_query_count(th_comment *_tc,char *_tag){
     111             :   long i;
     112             :   int  tag_len;
     113             :   int  count;
     114           0 :   tag_len=strlen(_tag);
     115           0 :   count=0;
     116           0 :   for(i=0;i<_tc->comments;i++){
     117           0 :     if(!oc_tagcompare(_tc->user_comments[i],_tag,tag_len))count++;
     118             :   }
     119           0 :   return count;
     120             : }
     121             : 
     122           0 : void th_comment_clear(th_comment *_tc){
     123           0 :   if(_tc!=NULL){
     124             :     long i;
     125           0 :     for(i=0;i<_tc->comments;i++)_ogg_free(_tc->user_comments[i]);
     126           0 :     _ogg_free(_tc->user_comments);
     127           0 :     _ogg_free(_tc->comment_lengths);
     128           0 :     _ogg_free(_tc->vendor);
     129           0 :     memset(_tc,0,sizeof(*_tc));
     130             :   }
     131           0 : }