static FLAC__bool vorbiscomment_set_entry_(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry *dest, const FLAC__StreamMetadata_VorbisComment_Entry *src, FLAC__bool copy)
{
FLAC__byte *save;
FLAC__ASSERT(0 != object);
FLAC__ASSERT(0 != dest);
FLAC__ASSERT(0 != src);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__ASSERT((0 != src->entry && src->length > 0) || (0 == src->entry && src->length == 0));
save = dest->entry;
/* do the copy first so that if we fail we leave the object untouched */
if(copy && (0 != src->entry && src->length > 0)) {
if(!copy_vcentry_(dest, src))
return false;
}
else {
/* either we're not copying or the src is null */
*dest = *src;
}
if(0 != save)
free(save);
vorbiscomment_calculate_length_(object);
return true;
}
FLAC_API FLAC__StreamMetadata *FLAC__metadata_object_new(FLAC__MetadataType type)
{
FLAC__StreamMetadata *object;
if(type > FLAC__MAX_METADATA_TYPE_CODE)
return 0;
object = (FLAC__StreamMetadata*)calloc(1, sizeof(FLAC__StreamMetadata));
if(0 != object) {
object->is_last = false;
object->type = type;
switch(type) {
case FLAC__METADATA_TYPE_STREAMINFO:
object->length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH;
break;
case FLAC__METADATA_TYPE_PADDING:
/* calloc() took care of this for us:
object->length = 0;
*/
break;
case FLAC__METADATA_TYPE_APPLICATION:
object->length = FLAC__STREAM_METADATA_APPLICATION_ID_LEN / 8;
/* calloc() took care of this for us:
object->data.application.data = 0;
*/
break;
case FLAC__METADATA_TYPE_SEEKTABLE:
/* calloc() took care of this for us:
object->length = 0;
object->data.seek_table.num_points = 0;
object->data.seek_table.points = 0;
*/
break;
case FLAC__METADATA_TYPE_VORBIS_COMMENT:
{
object->data.vorbis_comment.vendor_string.length = (unsigned)strlen(FLAC__VENDOR_STRING);
if(!copy_bytes_(&object->data.vorbis_comment.vendor_string.entry, (const FLAC__byte*)FLAC__VENDOR_STRING, object->data.vorbis_comment.vendor_string.length)) {
free(object);
return 0;
}
vorbiscomment_calculate_length_(object);
}
break;
case FLAC__METADATA_TYPE_CUESHEET:
cuesheet_calculate_length_(object);
break;
default:
/* calloc() took care of this for us:
object->length = 0;
object->data.unknown.data = 0;
*/
break;
}
}
return object;
}
static FLAC__bool vorbiscomment_set_entry_(FLAC__StreamMetadata *object, FLAC__StreamMetadata_VorbisComment_Entry *dest, const FLAC__StreamMetadata_VorbisComment_Entry *src, FLAC__bool copy)
{
FLAC__byte *save;
FLAC__ASSERT(0 != object);
FLAC__ASSERT(0 != dest);
FLAC__ASSERT(0 != src);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
FLAC__ASSERT((0 != src->entry && src->length > 0) || (0 == src->entry && src->length == 0));
save = dest->entry;
if(0 != src->entry && src->length > 0) {
if(copy) {
/* do the copy first so that if we fail we leave the dest object untouched */
if(!copy_vcentry_(dest, src))
return false;
}
else {
/* we have to make sure that the string we're taking over is null-terminated */
/*
* Stripping the const from src->entry is OK since we're taking
* ownership of the pointer. This is a hack around a deficiency
* in the API where the same function is used for 'copy' and
* 'own', but the source entry is a const pointer. If we were
* precise, the 'own' flavor would be a separate function with a
* non-const source pointer. But it's not, so we hack away.
*/
if(!ensure_null_terminated_((FLAC__byte**)(&src->entry), src->length))
return false;
*dest = *src;
}
}
else {
/* the src is null */
*dest = *src;
}
if(0 != save)
free(save);
vorbiscomment_calculate_length_(object);
return true;
}
FLAC_API FLAC__bool FLAC__metadata_object_vorbiscomment_resize_comments(FLAC__StreamMetadata *object, unsigned new_num_comments)
{
FLAC__ASSERT(0 != object);
FLAC__ASSERT(object->type == FLAC__METADATA_TYPE_VORBIS_COMMENT);
if(0 == object->data.vorbis_comment.comments) {
FLAC__ASSERT(object->data.vorbis_comment.num_comments == 0);
if(0 == new_num_comments)
return true;
else if(0 == (object->data.vorbis_comment.comments = vorbiscomment_entry_array_new_(new_num_comments)))
return false;
}
else {
const unsigned old_size = object->data.vorbis_comment.num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry);
const unsigned new_size = new_num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry);
FLAC__ASSERT(object->data.vorbis_comment.num_comments > 0);
/* if shrinking, free the truncated entries */
if(new_num_comments < object->data.vorbis_comment.num_comments) {
unsigned i;
for(i = new_num_comments; i < object->data.vorbis_comment.num_comments; i++)
if(0 != object->data.vorbis_comment.comments[i].entry)
free(object->data.vorbis_comment.comments[i].entry);
}
if(new_size == 0) {
free(object->data.vorbis_comment.comments);
object->data.vorbis_comment.comments = 0;
}
else if(0 == (object->data.vorbis_comment.comments = (FLAC__StreamMetadata_VorbisComment_Entry*)realloc(object->data.vorbis_comment.comments, new_size)))
return false;
/* if growing, zero all the length/pointers of new elements */
if(new_size > old_size)
memset(object->data.vorbis_comment.comments + object->data.vorbis_comment.num_comments, 0, new_size - old_size);
}
object->data.vorbis_comment.num_comments = new_num_comments;
vorbiscomment_calculate_length_(object);
return true;
}