FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj, unsigned length)
{
	FLAC__uint32 i;

	FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));

	/* read vendor string */
	if (length >= 8) {
		length -= 8; /* vendor string length + num comments entries alone take 8 bytes */
		FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
		if (!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length))
			return false; /* read_callback_ sets the state for us */
		if (obj->vendor_string.length > 0) {
			if (length < obj->vendor_string.length) {
				obj->vendor_string.length = 0;
				obj->vendor_string.entry = 0;
				goto skip;
			}
			else
				length -= obj->vendor_string.length;
			if (0 == (obj->vendor_string.entry = safe_malloc_add_2op_(obj->vendor_string.length, /*+*/1))) {
				decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
				return false;
			}
			if (!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length))
				return false; /* read_callback_ sets the state for us */
			obj->vendor_string.entry[obj->vendor_string.length] = '\0';
		}
		else
			obj->vendor_string.entry = 0;

		/* read num comments */
		FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
		if (!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->num_comments))
			return false; /* read_callback_ sets the state for us */

		/* read comments */
		if (obj->num_comments > 0) {
			if (0 == (obj->comments = safe_malloc_mul_2op_p(obj->num_comments, /*times*/sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
				decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
				return false;
			}
			for (i = 0; i < obj->num_comments; i++) {
				FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
				if (length < 4) {
					obj->num_comments = i;
					goto skip;
				}
				else
					length -= 4;
				if (!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->comments[i].length))
					return false; /* read_callback_ sets the state for us */
				if (obj->comments[i].length > 0) {
					if (length < obj->comments[i].length) {
						obj->comments[i].length = 0;
						obj->comments[i].entry = 0;
						obj->num_comments = i;
						goto skip;
					}
					else
						length -= obj->comments[i].length;
					if (0 == (obj->comments[i].entry = safe_malloc_add_2op_(obj->comments[i].length, /*+*/1))) {
						decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
						return false;
					}
					if (!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length))
						return false; /* read_callback_ sets the state for us */
					obj->comments[i].entry[obj->comments[i].length] = '\0';
				}
				else
					obj->comments[i].entry = 0;
			}
		}
		else
			obj->comments = 0;
	}

  skip:
	if (length > 0) {
		/* This will only happen on files with invalid data in comments */
		if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
			return false; /* read_callback_ sets the state for us */
	}

	return true;
}
Unknown