FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_insert_comment(FLAC__StreamMetadata *object, unsigned comment_num, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool copy)
{
FLAC__StreamMetadata_VorbisComment *vc;
FLAC__ASSERT(0 != object);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__ASSERT(comment_num <= object->data.vorbis_comment.num_comments);
vc = &object->data.vorbis_comment;
if(!FLAC__metadata_object_vorbiscomment_resize_comments(object, vc->num_comments+1))
return false;
/* move all comments >= comment_num forward one space */
memmove(&vc->comments[comment_num+1], &vc->comments[comment_num], sizeof(FLAC__StreamMetadata_VorbisComment_Entry)*(vc->num_comments-1-comment_num));
vc->comments[comment_num].length = 0;
vc->comments[comment_num].entry = 0;
return FLAC__metadata_object_vorbiscomment_set_comment(object, comment_num, entry, copy);
}
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_replace_comment(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry entry, FLAC__bool all, FLAC__bool copy)
{
FLAC__ASSERT(0 != entry.entry && entry.length > 0);
if(!FLAC__format_vorbiscomment_entry_is_legal(entry.entry, entry.length))
return false;
{
int i;
unsigned field_name_length;
const FLAC__byte *eq = (FLAC__byte*)memchr(entry.entry, '=', entry.length);
FLAC__ASSERT(0 != eq);
if(0 == eq)
return false; /* double protection */
field_name_length = eq-entry.entry;
if((i = vorbiscomment_find_entry_from_(object, 0, (const char *)entry.entry, field_name_length)) >= 0) {
unsigned index = (unsigned)i;
if(!FLAC__metadata_object_vorbiscomment_set_comment(object, index, entry, copy))
return false;
if(all && (index+1 < object->data.vorbis_comment.num_comments)) {
for(i = vorbiscomment_find_entry_from_(object, index+1, (const char *)entry.entry, field_name_length); i >= 0; ) {
if(!FLAC__metadata_object_vorbiscomment_delete_comment(object, (unsigned)i))
return false;
if((unsigned)i < object->data.vorbis_comment.num_comments)
i = vorbiscomment_find_entry_from_(object, (unsigned)i, (const char *)entry.entry, field_name_length);
else
i = -1;
}
}
return true;
}
else
return FLAC__metadata_object_vorbiscomment_append_comment(object, entry, copy);
}
}
