aboutsummaryrefslogblamecommitdiffstats
path: root/src/directory.c
blob: 9f85f26834249478185502a3babdc34f0f13fa20 (plain) (tree)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479






























































































































































































































































































































































































































































































                                                                                                        
                                                       




























































































                                                                                
                                                       














































































































































































































                                                                                        







                                                                   












                                                                       








                                                      
















































                                                                  
/* 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 "directory.h"

#include "ls.h"
#include "command.h"
#include "tables.h"
#include "utils.h"
#include "path.h"
#include "log.h"
#include "playlist.h"
#include "conf.h"
#include "stats.h"

#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <dirent.h>
#include <unistd.h>
#include <stdio.h>
#include <errno.h>

#define DIRECTORY_DIR		"directory: "
#define DIRECTORY_MTIME		"mtime: "
#define DIRECTORY_BEGIN		"begin: "
#define DIRECTORY_END		"end: "
#define DIRECTORY_INFO_BEGIN	"info_begin"
#define DIRECTORY_INFO_END	"info_end"
#define DIRECTORY_MPD_VERSION	"mpd_version: "
#define DIRECTORY_FS_CHARSET	"fs_charset: "

#define DIRECTORY_SEARCH_ALBUM		"album"
#define DIRECTORY_SEARCH_ARTIST		"artist"
#define DIRECTORY_SEARCH_TITLE		"title"
#define DIRECTORY_SEARCH_FILENAME	"filename"

typedef List DirectoryList;

typedef struct _Directory {
	char * utf8name;
	DirectoryList * subDirectories;
	struct _Directory * parentDirectory;
	SongList * songs;
	time_t mtime; /* modification time */
} Directory;

Directory * mp3rootDirectory;

char directorydb[MAXPATHLEN+1];

DirectoryList * newDirectoryList();

int addToDirectory(Directory * directory, char * shortname, char * name);

void freeDirectoryList(DirectoryList * list);

void freeDirectory(Directory * directory);

int exploreDirectory(Directory * directory);

int updateDirectory(Directory * directory);

int addSubDirectoryToDirectory(Directory * directory, char * shortname, char * name);

Directory * newDirectory(Directory * parentDirectory, char * dirname, time_t mtime) {
	Directory * directory;

	directory = malloc(sizeof(Directory));

	if(dirname!=NULL) directory->utf8name = strdup(dirname);
	else directory->utf8name = NULL;
	directory->parentDirectory = parentDirectory;
	directory->subDirectories = newDirectoryList();
	directory->songs = newSongList();
	if(mtime<0) directory->mtime = isDir(dirname);
	else directory->mtime = mtime;

	return directory;
}

void freeDirectory(Directory * directory) {
	freeDirectoryList(directory->subDirectories);
	removeSongsFromTables(directory->songs);
	deleteSongsFromPlaylist(directory->songs);
	freeSongList(directory->songs);
	if(directory->utf8name) free(directory->utf8name);
	free(directory);
}

DirectoryList * newDirectoryList() {
	return makeList((ListFreeDataFunc *)freeDirectory);
}

void freeDirectoryList(DirectoryList * directoryList) {
	freeList(directoryList);
}

void removeSongFromDirectory(Directory * directory, char * shortname) {
	void * song;

	if(findInList(directory->songs,shortname,&song)) {
		removeASongFromTables((Song *)song);
		deleteASongFromPlaylist((Song *)song);
		deleteFromList(directory->songs,shortname);
	}
}

int updateInDirectory(Directory * directory, char * shortname, char * name) {
	time_t mtime;
	void * song;
	void * subDir;

	if((mtime = isMusic(name))) {
		if(0==findInList(directory->songs,shortname,&song)) {
			LOG("adding %s\n",name);
			addToDirectory(directory,shortname,name);
		}
		else if(mtime>((Song *)song)->mtime) {
			LOG("updating %s\n",name);
			updateSongInfo((Song *)song);
		}
	}
	else if((mtime = isDir(name))) {
		if(findInList(directory->subDirectories,shortname,(void **)&subDir)) {
			updateDirectory((Directory *)subDir);
		}
		else addSubDirectoryToDirectory(directory,shortname,name);
	}

	return 0;
}

int removeDeletedFromDirectory(Directory * directory) {
	DIR * dir;
	char cwd[2];
	struct dirent * ent;
	char * dirname = directory->utf8name;
	List * entList = makeList(free);
	void * name;
	char * s;
	char * utf8;
	ListNode * node;
	ListNode * tmpNode;

	cwd[0] = '.';
	cwd[1] = '\0';
	if(dirname==NULL) dirname=cwd;

	if((dir = opendir(rmp2amp(utf8ToFsCharset(dirname))))==NULL) return -1;

	while((ent = readdir(dir))) {
		if(ent->d_name[0]=='.') continue; /* hide hidden stuff */

		utf8 = strdup(fsCharsetToUtf8(ent->d_name));

		if(directory->utf8name) {
			s = malloc(strlen(directory->utf8name)+strlen(utf8)+2);
			sprintf(s,"%s/%s",directory->utf8name,utf8);
		}
		else s= strdup(utf8);
		insertInList(entList,fsCharsetToUtf8(ent->d_name),s);
		free(utf8);
	}

	closedir(dir);

	node = directory->subDirectories->firstNode;
	while(node) {
		tmpNode = node->nextNode;
		if(findInList(entList,node->key,&name)) {
			if(!isDir((char *)name)) {
				deleteFromList(directory->subDirectories,node->key);
			}
		}
		else {
			deleteFromList(directory->subDirectories,node->key);
		}
		node = tmpNode;
	}

	node = directory->songs->firstNode;
	while(node) {
		tmpNode = node->nextNode;
		if(findInList(entList,node->key,(void **)&name)) {
			if(!isMusic(name)) {
				removeSongFromDirectory(directory,node->key);
			}
		}
		else {
			removeSongFromDirectory(directory,node->key);
		}
		node = tmpNode;
	}

	freeList(entList);

	return 0;
}

int updateDirectory(Directory * directory) {
	DIR * dir;
	char cwd[2];
	struct dirent * ent;
	char * s;
	char * utf8;
	char * dirname = directory->utf8name;

	cwd[0] = '.';
	cwd[1] = '\0';
	if(dirname==NULL) dirname=cwd;

	removeDeletedFromDirectory(directory);

	if((dir = opendir(rmp2amp(utf8ToFsCharset(dirname))))==NULL) return -1;

	while((ent = readdir(dir))) {
		if(ent->d_name[0]=='.') continue; /* hide hidden stuff */

		utf8 = strdup(fsCharsetToUtf8(ent->d_name));

		if(directory->utf8name) {
			s = malloc(strlen(directory->utf8name)+strlen(utf8)+2);
			sprintf(s,"%s/%s",directory->utf8name,utf8);
		}
		else s = strdup(utf8);
		updateInDirectory(directory,utf8,s);
		free(utf8);
		free(s);
	}
	
	closedir(dir);

	if(directory->utf8name) directory->mtime = isDir(directory->utf8name);

	return 0;
}

int exploreDirectory(Directory * directory) {
	DIR * dir;
	char cwd[2];
	struct dirent * ent;
	char * s;
	char * utf8;
	char * dirname = directory->utf8name;

	cwd[0] = '.';
	cwd[1] = '\0';
	if(dirname==NULL) dirname=cwd;

	DEBUG("explore: attempting to opendir: %s\n",dirname);
	if((dir = opendir(rmp2amp(utf8ToFsCharset(dirname))))==NULL) return -1;

	LOG("explore: %s\n",dirname);
	while((ent = readdir(dir))) {
		if(ent->d_name[0]=='.') continue; /* hide hidden stuff */

		utf8 = strdup(fsCharsetToUtf8(ent->d_name));

		DEBUG("explore: found: %s (%s)\n",ent->d_name,utf8);

		if(directory->utf8name) {
			s = malloc(strlen(directory->utf8name)+strlen(utf8)+2);
			sprintf(s,"%s/%s",directory->utf8name,utf8);
		}
		else s = strdup(utf8);
		addToDirectory(directory,utf8,s);
		free(utf8);
		free(s);
	}
	
	closedir(dir);

	return 0;
}

int addSubDirectoryToDirectory(Directory * directory, char * shortname, 
	char * name) 
{
	Directory * subDirectory = newDirectory(directory,name,-1);
	
	insertInList(directory->subDirectories,shortname,subDirectory);
	exploreDirectory(subDirectory);

	return 0;
}

int addToDirectory(Directory * directory, char * shortname, char * name) {
	if(isDir(name)) {
		return addSubDirectoryToDirectory(directory,shortname,name);
	}
	else if(isMusic(name)) {
		Song * song;
		song = addSongToList(directory->songs,shortname,name);
		if(!song) return -1;
		addSongToTables(song);
		return 0;
	}

	DEBUG("addToDirectory: %s is not a directory or music\n",name);

	return -1;
}

void closeMp3Directory() {
	freeDirectory(mp3rootDirectory);
}

Directory * findSubDirectory(Directory * directory,char * name) {
	void * subDirectory;
	char * dup = strdup(name);
	char * key;

	key = strtok(dup,"/");
	if(!key) {
		free(dup);
		return NULL;
	}
	
	if(findInList(directory->subDirectories,key,&subDirectory)) {
		free(dup);
		return (Directory *)subDirectory;
	}

	free(dup);
	return NULL;
}

Directory * getSubDirectory(Directory * directory,char * name) {
	Directory * subDirectory;
	int len;

	if(name==NULL || name[0]=='\0' || strcmp(name,"/")==0) {
		return directory;
	}

	if((subDirectory = findSubDirectory(directory,name))==NULL) return NULL;

	len = 0;
	while(name[len]!='/' && name[len]!='\0') len++;
	while(name[len]=='/') len++;

	return getSubDirectory(subDirectory,&(name[len]));
}

Directory * getDirectory(char * name) {
	return getSubDirectory(mp3rootDirectory,name);
}

int printDirectoryList(FILE * fp, DirectoryList * directoryList) {
	ListNode * node = directoryList->firstNode;
	Directory * directory;

	while(node!=NULL) {
		directory = (Directory *)node->data;
		myfprintf(fp,"%s%s\n",DIRECTORY_DIR,directory->utf8name);
		node = node->nextNode;
	}

	return 0;
}

int printDirectoryInfo(FILE * fp, char * name) {
	Directory * directory;
	
	if((directory = getDirectory(name))==NULL) {
		myfprintf(fp,"%s: directory not found\n",COMMAND_RESPOND_ERROR);
		return -1;
	}

	printDirectoryList(fp,directory->subDirectories);
	printSongInfoFromList(fp,directory->songs);

	return 0;
}

void writeDirectoryInfo(FILE * fp, Directory * directory) {
	ListNode * node = (directory->subDirectories)->firstNode;
	Directory * subDirectory;

	if(directory->utf8name) {
		myfprintf(fp,"%s%s\n",DIRECTORY_BEGIN,directory->utf8name);
	}
			
	while(node!=NULL) {
		subDirectory = (Directory *)node->data;
		myfprintf(fp,"%s%s\n",DIRECTORY_DIR,node->key);
		myfprintf(fp,"%s%li\n",DIRECTORY_MTIME,(long)subDirectory->mtime);
		writeDirectoryInfo(fp,subDirectory);
		node = node->nextNode;
	}

	writeSongInfoFromList(fp,directory->songs);

	if(directory->utf8name) {
		myfprintf(fp,"%s%s\n",DIRECTORY_END,directory->utf8name);
	}
}

void readDirectoryInfo(FILE * fp,Directory * directory) {
	char buffer[MAXPATHLEN*2];
	int bufferSize = MAXPATHLEN*2;
	char * key;
	Directory * subDirectory;
	char * name;
	time_t mtime;

	while(myFgets(buffer,bufferSize,fp) && 0!=strncmp(DIRECTORY_END,buffer,strlen(DIRECTORY_END))) {
		if(0==strncmp(DIRECTORY_DIR,buffer,strlen(DIRECTORY_DIR))) {
			key = strdup(&(buffer[strlen(DIRECTORY_DIR)]));
			if(myFgets(buffer,bufferSize,fp)<0) {
				ERROR("Error reading db\n");
				exit(-1);
			}
			if(strncmp(DIRECTORY_MTIME,buffer,strlen(DIRECTORY_MTIME))) {
				ERROR("Error reading db\n");
				ERROR("%s\n",buffer);
				exit(-1);
			}
			mtime = atoi(&(buffer[strlen(DIRECTORY_BEGIN)]));
			if(myFgets(buffer,bufferSize,fp)<0) {
				ERROR("Error reading db\n");
				exit(-1);
			}
			if(strncmp(DIRECTORY_BEGIN,buffer,strlen(DIRECTORY_BEGIN))) {
				ERROR("Error reading db\n");
				exit(-1);
			}
			name = strdup(&(buffer[strlen(DIRECTORY_BEGIN)]));
			subDirectory = newDirectory(directory,name,mtime);
			insertInList(directory->subDirectories,key,(void *)subDirectory);
			free(key);
			free(name);
			readDirectoryInfo(fp,subDirectory);
		}
		else if(0==strncmp(SONG_BEGIN,buffer,strlen(SONG_BEGIN))) {
			readSongInfoIntoList(fp,directory->songs);
		}
		else {
			ERROR("Unknown line in db: %s\n",buffer);
			exit(-1);
		}
	}
}

void sortDirectory(Directory * directory) {
	ListNode * node = directory->subDirectories->firstNode;
	Directory * subDir;
	
	sortList(directory->subDirectories);
	sortList(directory->songs);

	while(node!=NULL) {
		subDir = (Directory *)node->data;
		sortDirectory(subDir);
		node = node->nextNode;
	}
}

int writeDirectoryDB() {
	FILE * fp;

	sortDirectory(mp3rootDirectory);
	stats.numberOfSongs = countSongsIn(stderr,NULL);
	stats.dbPlayTime = sumSongTimesIn(stderr,NULL);

	while(!(fp=fopen(directorydb,"w")) && errno==EINTR);
	if(!fp) return -1;

	myfprintf(fp,"%s\n",DIRECTORY_INFO_BEGIN);
	myfprintf(fp,"%s%s\n",DIRECTORY_MPD_VERSION,VERSION);
	myfprintf(fp,"%s%s\n",DIRECTORY_FS_CHARSET,getFsCharset());
	myfprintf(fp,"%s\n",DIRECTORY_INFO_END);

	writeDirectoryInfo(fp,mp3rootDirectory);
	while(fclose(fp) && errno==EINTR);

	return 0;
}

int readDirectoryDB() {
	FILE * fp;

	mp3rootDirectory = newDirectory(NULL,NULL,0);
	while(!(fp=fopen(directorydb,"r")) && errno==EINTR);
	if(!fp) return -1;

	/* get initial info */
	{
		char buffer[100];
		int bufferSize = 100;
		int foundFsCharset = 0;
		int foundVersion = 0;

		if(myFgets(buffer,bufferSize,fp)<0) {
			ERROR("Error reading db\n");
			exit(-1);
		}
		if(0==strcmp(DIRECTORY_INFO_BEGIN,buffer)) {
			while(myFgets(buffer,bufferSize,fp) && 
					0!=strcmp(DIRECTORY_INFO_END,buffer)) 
			{
				if(0==strncmp(DIRECTORY_MPD_VERSION,buffer,
						strlen(DIRECTORY_MPD_VERSION)))
				{
					if(foundVersion) {
						ERROR("already found "
							"version in db\n");
						exit(-1);
					}
					foundVersion = 1;
				}
				else if(0==strncmp(DIRECTORY_FS_CHARSET,buffer,
						strlen(DIRECTORY_FS_CHARSET)))
				{
					char * fsCharset; 

					if(foundFsCharset) {
						ERROR("already found "
							"fs charset in db\n");
						exit(-1);
					}

					foundFsCharset = 1;

					fsCharset = &(buffer[strlen(
							DIRECTORY_FS_CHARSET)]);
					if(getConf()[CONF_FS_CHARSET] && 
							strcmp(fsCharset,
							getFsCharset())) 
					{
						ERROR("Using \"%s\" for the "
							"filesystem charset "
							"instead of \"%s\"\n",
							fsCharset,
							getFsCharset());
						ERROR("maybe you need to "
							"recreate the db?\n");
						setFsCharset(fsCharset);
					}
				}
				else {
					ERROR("unknown line in db info: %s\n",
						buffer);
				}
			}
		}
		else {
			ERROR("db info not found in db file\n");
			ERROR("you should recreate the db using --create-db\n");
			fseek(fp,0,SEEK_SET);
		}
	}

	readDirectoryInfo(fp,mp3rootDirectory);
	while(fclose(fp) && errno==EINTR);

	stats.numberOfSongs = countSongsIn(stderr,NULL);
	stats.dbPlayTime = sumSongTimesIn(stderr,NULL);

	return 0;
}

int updateMp3Directory(FILE * fp) {
	if(updateDirectory(mp3rootDirectory)<0) {
		ERROR("problems updating music db\n");
		myfprintf(fp,"%s problems updating music db\n",COMMAND_RESPOND_ERROR);
		return -1;
	}

	if(writeDirectoryDB()<0) {
		ERROR("problems writing music db file, \"%s\"\n",directorydb);
		myfprintf(fp,"%s problems writing music db\n",COMMAND_RESPOND_ERROR);
		return -1;
	}
	
	return 0;
}

int traverseAllInSubDirectory(FILE * fp, Directory * directory,
                                int (*forEachSong)(FILE *, Song *, void *),
                                int (*forEachDir)(FILE *, Directory *, void *),
				void * data)
{
        ListNode * node = directory->songs->firstNode;
        Song * song;
        Directory * dir;
        int errFlag = 0;

        if(forEachDir) {
                errFlag = forEachDir(fp,directory,data);
                if(errFlag) return errFlag;
        }

        if(forEachSong) {
                while(node!=NULL && !errFlag) {
                        song = (Song *)node->data;
                        errFlag = forEachSong(fp,song,data);
                        node = node->nextNode;
                }
                if(errFlag) return errFlag;
        }

        node = directory->subDirectories->firstNode;

        while(node!=NULL && !errFlag) {
                dir = (Directory *)node->data;
                errFlag = traverseAllInSubDirectory(fp,dir,forEachSong,
                                                        forEachDir,data);
                node = node->nextNode;
        }

        return errFlag;
}

int traverseAllIn(FILE * fp, char * name, 
			int (*forEachSong)(FILE *, Song *, void *),
			int (*forEachDir)(FILE *, Directory *, void *),
			void * data) {
	Directory * directory;

	if((directory = getDirectory(name))==NULL) {
		Song * song;
		if((song = getSong(name)) && forEachSong) {
			return forEachSong(fp, song, data);
		}
		myfprintf(fp,"%s: directory or file not found\n",COMMAND_RESPOND_ERROR);
		return -1;
	}

	return traverseAllInSubDirectory(fp,directory,forEachSong,forEachDir,
			data);
}

int countSongsInDirectory(FILE * fp, Directory * directory, void * data) {
	int * count = (int *)data;

	*count+=directory->songs->numberOfNodes;
	
        return 0;
}

int printDirectoryInDirectory(FILE * fp, Directory * directory, void * data) {
        if(directory->utf8name) {
		myfprintf(fp,"directory: %s\n",directory->utf8name);
	}
        return 0;
}

int printSongInDirectory(FILE * fp, Song * song, void * data) {
        myfprintf(fp,"file: %s\n",song->utf8file);
        return 0;
}

int searchForAlbumInDirectory(FILE * fp, Song * song, void * string) {
	if(song->tag && song->tag->album) {
		char * dup = strDupToUpper(song->tag->album);
		if(strstr(dup,(char *)string)) printSongInfo(fp,song);
		free(dup);
	}
	return 0;
}

int searchForArtistInDirectory(FILE * fp, Song * song, void * string) {
	if(song->tag && song->tag->artist) {
		char * dup = strDupToUpper(song->tag->artist);
		if(strstr(dup,(char *)string)) printSongInfo(fp,song);
		free(dup);
	}
	return 0;
}

int searchForTitleInDirectory(FILE * fp, Song * song, void * string) {
	if(song->tag && song->tag->title) {
		char * dup = strDupToUpper(song->tag->title);
		if(strstr(dup,(char *)string)) printSongInfo(fp,song);
		free(dup);
	}
	return 0;
}

int searchForFilenameInDirectory(FILE * fp, Song * song, void * string) {
	char * dup = strDupToUpper(song->utf8file);
	if(strstr(dup,(char *)string)) printSongInfo(fp,song);
	free(dup);
	return 0;
}

int searchForSongsIn(FILE * fp, char * name, char * item, char * string) {
	char * dup = strDupToUpper(string);
	int ret = -1;

	if(strcmp(item,DIRECTORY_SEARCH_ALBUM)==0) {
		ret = traverseAllIn(fp,name,searchForAlbumInDirectory,NULL,
			(void *)dup);
	}
	else if(strcmp(item,DIRECTORY_SEARCH_ARTIST)==0) {
		ret = traverseAllIn(fp,name,searchForArtistInDirectory,NULL,
			(void *)dup);
	}
	else if(strcmp(item,DIRECTORY_SEARCH_TITLE)==0) {
		ret = traverseAllIn(fp,name,searchForTitleInDirectory,NULL,
			(void *)dup);
	}
	else if(strcmp(item,DIRECTORY_SEARCH_FILENAME)==0) {
		ret = traverseAllIn(fp,name,searchForFilenameInDirectory,NULL,
			(void *)dup);
	}
	else myfprintf(fp,"%s unknown table\n",COMMAND_RESPOND_ERROR);

	free(dup);

	return ret;
}

int findAlbumInDirectory(FILE * fp, Song * song, void * string) {
	if(song->tag && song->tag->album && 
			strcmp((char *)string,song->tag->album)==0) 
	{
		printSongInfo(fp,song);
	}

	return 0;
}

int findArtistInDirectory(FILE * fp, Song * song, void * string) {
	if(song->tag && song->tag->artist && 
			strcmp((char *)string,song->tag->artist)==0) 
	{
		printSongInfo(fp,song);
	}

	return 0;
}

int findSongsIn(FILE * fp, char * name, char * item, char * string) {
	if(strcmp(item,DIRECTORY_SEARCH_ALBUM)==0) {
		return traverseAllIn(fp,name,findAlbumInDirectory,NULL,
			(void *)string);
	}
	else if(strcmp(item,DIRECTORY_SEARCH_ARTIST)==0) {
		return traverseAllIn(fp,name,findArtistInDirectory,NULL,
			(void *)string);
	}

	myfprintf(fp,"%s unknown table\n",COMMAND_RESPOND_ERROR);
	return -1;
}

int printAllIn(FILE * fp, char * name) {
	return traverseAllIn(fp,name,printSongInDirectory,
				printDirectoryInDirectory,NULL);
}

int directoryAddSongToPlaylist(FILE * fp, Song * song, void * data) {
	return addSongToPlaylist(fp,song);
}

int addAllIn(FILE * fp, char * name) {
	return traverseAllIn(fp,name,directoryAddSongToPlaylist,NULL,NULL);
}

int directoryPrintSongInfo(FILE * fp, Song * song, void * data) {
	return printSongInfo(fp,song);
}

int sumSongTime(FILE * fp, Song * song, void * data) {
	unsigned long * time = (unsigned long *)data;

	if(song->tag && song->tag->time>=0) *time+=song->tag->time;

	return 0;
}

int printInfoForAllIn(FILE * fp, char * name) {
        return traverseAllIn(fp,name,directoryPrintSongInfo,NULL,NULL);
}

int countSongsIn(FILE * fp, char * name) {
	int count = 0;
	void * ptr = (void *)&count;
	
        traverseAllIn(fp,name,NULL,countSongsInDirectory,ptr);

	return count;
}

unsigned long sumSongTimesIn(FILE * fp, char * name) {
	unsigned long dbPlayTime = 0;
	void * ptr = (void *)&dbPlayTime;
	
        traverseAllIn(fp,name,sumSongTime,NULL,ptr);

	return dbPlayTime;
}

void initMp3Directory() {
	mp3rootDirectory = newDirectory(NULL,NULL,0);
	exploreDirectory(mp3rootDirectory);
}

Song * getSong(char * file) {
	void * song;
	Directory * directory;
	char * dir = NULL;
	char * dup = strdup(file);
	char * shortname = dup;
	char * c = strtok(dup,"/");

	DEBUG("get song: %s\n",file);

	while(c) {
		shortname = c;
		c = strtok(NULL,"/");
	}

	if(shortname!=dup) {
		for(c = dup; c < shortname-1; c++) {
			if(*c=='\0') *c = '/';
		}
		dir = dup;
	}

	if(!(directory = getSubDirectory(mp3rootDirectory,dir))) {
		free(dup);
		return NULL;
	}

	if(!findInList(directory->songs,shortname,&song)) {
		free(dup);
		return NULL;
	}

	free(dup);
	return (Song *)song;
}

time_t getDbModTime() {
	time_t mtime = 0;
	struct stat st;

	if(stat(directorydb,&st)==0) mtime = st.st_mtime;

	return mtime;
}