int flac_write( const char* filename, const char *predicate, const char* uri )
{
if (strcmp(predicate, LL_LICENSE) != 0) {
return -LL_E_MODULE_WRITE_FAIL; /* We only know License */
}
int ret = 1;
FLAC__Metadata_SimpleIterator *iter = FLAC__metadata_simple_iterator_new();
if (FLAC__metadata_simple_iterator_init(iter,filename,false,false) && FLAC__metadata_simple_iterator_is_writable(iter)) {
FLAC__bool found_vc = false;
do {
if (FLAC__metadata_simple_iterator_get_block_type(iter) == FLAC__METADATA_TYPE_VORBIS_COMMENT) {
FLAC__StreamMetadata *vc;
found_vc = true;
vc = FLAC__metadata_simple_iterator_get_block(iter);
if (uri) {
FLAC__StreamMetadata_VorbisComment_Entry entry;
FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "LICENSE", uri);
FLAC__metadata_object_vorbiscomment_replace_comment(vc,entry,true,false);
} else {
int i = FLAC__metadata_object_vorbiscomment_find_entry_from(vc,0,"LICENSE");
if (i != -1) {
FLAC__metadata_object_vorbiscomment_delete_comment(vc,i);
}
}
ret = FLAC__metadata_simple_iterator_set_block(iter, vc, true);
FLAC__metadata_object_delete(vc);
break;
}
} while (FLAC__metadata_simple_iterator_next(iter));
if (!found_vc && uri) {
FLAC__StreamMetadata *vc = FLAC__metadata_object_new(FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__StreamMetadata_VorbisComment_Entry entry;
FLAC__metadata_object_vorbiscomment_entry_from_name_value_pair(&entry, "LICENSE", uri);
FLAC__metadata_object_vorbiscomment_append_comment(vc,entry,false);
ret = FLAC__metadata_simple_iterator_insert_block_after(iter,vc,true);
FLAC__metadata_object_delete(vc);
}
} else {
ret = 0;
}
FLAC__metadata_simple_iterator_delete(iter);
return ret;
}
FLAC_API int FLAC__metadata_object_vorbiscomment_remove_entry_matching(FLAC__StreamMetadata *object, const char *field_name)
{
const unsigned field_name_length = strlen(field_name);
unsigned i;
FLAC__ASSERT(0 != object);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
for(i = 0; i < object->data.vorbis_comment.num_comments; i++) {
if(FLAC__metadata_object_vorbiscomment_entry_matches(object->data.vorbis_comment.comments + i, field_name, field_name_length)) {
if(!FLAC__metadata_object_vorbiscomment_delete_comment(object, i))
return -1;
else
return 1;
}
}
return 0;
}
FLAC_API int FLAC__metadata_object_vorbiscomment_remove_entries_matching(FLAC__StreamMetadata *object, const char *field_name)
{
FLAC__bool ok = true;
unsigned matching = 0;
const unsigned field_name_length = strlen(field_name);
int i;
FLAC__ASSERT(0 != object);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
/* must delete from end to start otherwise it will interfere with our iteration */
for(i = (int)object->data.vorbis_comment.num_comments - 1; ok && i >= 0; i--) {
if(FLAC__metadata_object_vorbiscomment_entry_matches(object->data.vorbis_comment.comments + i, field_name, field_name_length)) {
matching++;
ok &= FLAC__metadata_object_vorbiscomment_delete_comment(object, (unsigned)i);
}
}
return ok? (int)matching : -1;
}
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);
}
}
