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Automatically update database on version change

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This commit is contained in:
Ron Pedde 2004-12-21 04:37:35 +00:00
parent 026b528136
commit 34c3ba8b2a
1 changed files with 26 additions and 3 deletions
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29
src/db-gdbm.c
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@ -46,7 +46,7 @@
/* /*
* Defines * Defines
*/ */
#define DB_VERSION 7 #define DB_VERSION 8
#define STRLEN(a) (a) ? strlen((a)) + 1 : 1 #define STRLEN(a) (a) ? strlen((a)) + 1 : 1
#define MAYBEFREE(a) { if((a)) free((a)); }; #define MAYBEFREE(a) { if((a)) free((a)); };
@ -75,7 +75,7 @@ typedef struct tag_playlistentry {
} DB_PLAYLISTENTRY; } DB_PLAYLISTENTRY;
typedef struct tag_playlist { typedef struct tag_playlist {
unsigned long int id; unsigned long int id;
int songs; int songs;
int is_smart; int is_smart;
int found; int found;
@ -278,17 +278,40 @@ void db_init_once(void) {
*/ */
int db_open(char *parameters, int reload) { int db_open(char *parameters, int reload) {
char db_path[PATH_MAX + 1]; char db_path[PATH_MAX + 1];
datum tmp_key,tmp_value;
int current_db_version;
if(pthread_once(&db_initlock,db_init_once)) if(pthread_once(&db_initlock,db_init_once))
return -1; return -1;
snprintf(db_path,sizeof(db_path),"%s/%s",parameters,"songs.gdb"); snprintf(db_path,sizeof(db_path),"%s/%s",parameters,"songs.gdb");
reload = reload ? GDBM_NEWDB : GDBM_WRCREAT; reload = reload ? GDBM_NEWDB : GDBM_WRCREAT;
db_gdbmlock(); db_gdbmlock();
db_songs=gdbm_open(db_path, 0, reload | GDBM_SYNC | GDBM_NOLOCK, db_songs=gdbm_open(db_path, 0, reload | GDBM_SYNC | GDBM_NOLOCK,
0600,NULL); 0600,NULL);
if((reload == GDBM_WRCREAT) && (db_songs)) {
/* check the version number... reloading if necessary */
tmp_key=gdbm_firstkey(db_songs);
if(tmp_key.dptr) {
tmp_value=gdbm_fetch(db_songs,tmp_key);
if(tmp_value.dptr) {
current_db_version=*((int*)tmp_value.dptr);
if(current_db_version != DB_VERSION) {
DPRINTF(E_LOG,L_DB,"Database version changed... updating database\n");
gdbm_close(db_songs);
db_songs=gdbm_open(db_path,0,GDBM_NEWDB|GDBM_SYNC|GDBM_NOLOCK,0600,NULL);
} else {
DPRINTF(E_LOG,L_DB,"Current database version: %d\n",DB_VERSION);
}
free(tmp_value.dptr);
}
free(tmp_key.dptr);
}
}
db_gdbmunlock(); db_gdbmunlock();
if(!db_songs) { if(!db_songs) {