/* portions of this code were taken from vorbisfile api documentation examples
   BSD licensing, etc is still in effect
*/

#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <ftw.h>
#include <string.h>
#include <vorbis/codec.h>
#include <vorbis/vorbisfile.h>

int outputOggHeaderLen(const char *fileName, const struct stat *status, int type);
char* escapeColons( char *stringIn );

int main(int argc, char *argv[]){
  if(argc == 1)
    ftw(".", outputOggHeaderLen, 1);
  else
    ftw(argv[1], outputOggHeaderLen, 1);
  
  return(0);
}

int outputOggHeaderLen(const char *fileName, const struct stat *status, int type) {

  if(type == FTW_F) {
    FILE *oggFile;
    OggVorbis_File vf;
  
    oggFile = fopen( fileName, "r" );
    if(ov_open(oggFile, &vf, NULL, 0) < 0) {
	//fprintf(stderr,"File: %s skipped.\n", fileName );
	return 0;
    }

  /* Throw the comments plus a few lines about the bitstream we're
    decoding */

    char **ptr=ov_comment(&vf,-1)->user_comments;
    unsigned int commentLen = 0;
    vorbis_info *vi=ov_info(&vf,-1);
    while(*ptr){
      //fprintf(stderr,"%s\n",*ptr);
      commentLen += strlen(*ptr)+1;
      ++ptr;
    }
    fprintf(stdout,"%s:%d\n", escapeColons(fileName), commentLen);
    
    ov_clear(&vf);
  }

  return 0;
}

char* escapeColons( char *stringIn ) {
  unsigned int colonCount=0;
  unsigned int length = strlen( stringIn );
  while(*stringIn) {
    if(*stringIn==':')
      colonCount++;
    ++stringIn;
  }
  stringIn-=length;
  char *outString,*base;
  outString = malloc(sizeof(char) * (length + 1 + colonCount));
  base=outString;
  while(*stringIn) {
    if(*stringIn==':')
      *(outString++)='\\';
    *outString=*stringIn;
    ++stringIn;
    ++outString;
  }
  *outString='\0';
  return base;
}