void remove_tag(const char* file_name)
{
FILE* file;
FILE* temp_file;
ID3v2_header* tag_header;
file = fopen(file_name, "r+b");
temp_file = tmpfile();
tag_header = get_tag_header(file_name);
if(tag_header == NULL)
{
return;
}
fseek(file, tag_header->tag_size + 10, SEEK_SET);
int c;
while((c = getc(file)) != EOF)
{
putc(c, temp_file);
}
// Write temp file data back to original file
fseek(temp_file, 0, SEEK_SET);
fseek(file, 0, SEEK_SET);
while((c = getc(temp_file)) != EOF)
{
putc(c, file);
}
}
ID3v2_tag* load_tag(const char* file_name)
{
// Declaration
FILE* file;
ID3v2_tag* tag;
ID3v2_frame_list* frame_list;
ID3v2_header* tag_header;
// Initialization
tag = new_tag();
tag_header = get_tag_header(file_name);
if(tag_header == NULL ||
get_tag_version(tag_header) == NO_COMPATIBLE_TAG)
{
// No compatible ID3 tag in the file, or we got some problem opening the file
free_tag(tag);
return NULL;
}
// Associations
tag->tag_header = tag_header;
file = fopen(file_name, "rb");
if(file == NULL)
{
perror("Error opening file");
free_tag(tag);
return NULL;
}
tag->raw = (char*) malloc(tag->tag_header->tag_size * sizeof(char));
fseek(file, 10, SEEK_SET);
fread(tag->raw, tag->tag_header->tag_size, 1, file);
fclose(file);
int offset = 0;
while(offset < tag->tag_header->tag_size)
{
ID3v2_frame* frame;
frame = parse_frame(tag->raw, offset, get_tag_version(tag_header));
if(frame != NULL)
{
offset += frame->size + 10;
add_to_list(tag->frames, frame);
}
else
{
break;
}
}
return tag;
}
