mpd/src/metadataChunk.c

/* the Music Player Daemon (MPD)
 * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
 * This project's homepage is: http://www.musicpd.org
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "metadataChunk.h"

#include <string.h>

void initMetadataChunk(MetadataChunk * chunk) {
	memset(chunk, 0, sizeof(MetadataChunk));
	
	chunk->name = -1;
	chunk->artist = -1;
	chunk->album = -1;
	chunk->title = -1;
}

#define dupElementToTag(string, element) { \
	if(element >= 0 && element < METADATA_BUFFER_LENGTH) { \
		string = strdup(chunk->buffer+element); \
	} \
}

MpdTag * metadataChunkToMpdTagDup(MetadataChunk * chunk) {
	MpdTag * ret = newMpdTag();

	chunk->buffer[METADATA_BUFFER_LENGTH] = '\0';

	dupElementToTag(ret->name, chunk->name);
	dupElementToTag(ret->title, chunk->title);
	dupElementToTag(ret->artist, chunk->artist);
	dupElementToTag(ret->album, chunk->album);

	return ret;
}

#define copyStringToChunk(string, element) { \
	if(string && (slen = strlen(string)) && \
                        pos < METADATA_BUFFER_LENGTH-1) \
        { \
		strncpy(chunk->buffer+pos, string, \
                                METADATA_BUFFER_LENGTH-1-pos); \
		element = pos; \
		pos += slen+1; \
	} \
}

void copyMpdTagToMetadataChunk(MpdTag * tag, MetadataChunk * chunk) {
	int pos = 0;
	int slen;

	initMetadataChunk(chunk);

	copyStringToChunk(tag->name, chunk->name);
	copyStringToChunk(tag->title, chunk->title);
	copyStringToChunk(tag->artist, chunk->artist);
	copyStringToChunk(tag->album, chunk->album);
}