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/* the Music Player Daemon (MPD)
* (c)2003-2006 by Warren Dukes (warren.dukes@gmail.com)
* 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 "tagTracker.h"
#include "log.h"
#include <glib/gtree.h>
#include <assert.h>
#include <stdlib.h>
static GTree * tagLists[TAG_NUM_OF_ITEM_TYPES] =
{
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL
};
typedef struct tagTrackerItem {
int count;
mpd_sint8 visited;
} TagTrackerItem;
static int keyCompare(const void *a, const void *b, void *data) {
return strcmp(a,b);
}
char * getTagItemString(int type, char * string) {
TagTrackerItem * item;
TagTrackerItem ** itemPointer = &item;
char *key;
char **keyPointer = &key;
if(tagLists[type] == NULL) {
tagLists[type] = g_tree_new_full(keyCompare, NULL, free, free);
}
if((TagTrackerItem *)g_tree_lookup_extended(tagLists[type], string, (void**)keyPointer, (void**)itemPointer )) {
item->count++;
}
else {
item = malloc(sizeof(TagTrackerItem));
item->count = 1;
item->visited = 0;
key = strdup(string);
g_tree_insert(tagLists[type], key, item);
}
return key;
}
void removeTagItemString(int type, char * string) {
TagTrackerItem *item;
assert(string);
assert(tagLists[type]);
if(tagLists[type] == NULL) return;
if((item = g_tree_lookup(tagLists[type], string))) {
item->count--;
if(item->count <= 0) g_tree_remove(tagLists[type], string);
}
/* why would this be done??? free it when mpd quits...
if(tagLists[type]->numberOfNodes == 0) {
freeList(tagLists[type]);
tagLists[type] = NULL;
}
*/
}
void destroyTagTracker() {
int type;
for (type=0; type < TAG_NUM_OF_ITEM_TYPES; type ++)
if (tagLists[type])
g_tree_destroy(tagLists[type]);
}
int getNumberOfTagItems(int type) {
if(tagLists[type] == NULL) return 0;
return g_tree_nnodes(tagLists[type]);
}
static int calcSavedMemory(char *key, TagTrackerItem* value, int* sum) {
*sum -= sizeof(int) + 4*sizeof(void*); /* sizeof(_GTreeNode) */
*sum -= sizeof(TagTrackerItem);
*sum += (strlen(key)+1)*value->count;
return FALSE;
}
void printMemorySavedByTagTracker() {
int i;
size_t sum = 0;
for(i = 0; i < TAG_NUM_OF_ITEM_TYPES; i++) {
if(!tagLists[i]) continue;
sum -= 5*sizeof(void*);/* sizeof(_GTree) */
g_tree_foreach(tagLists[i], (GTraverseFunc)calcSavedMemory, &sum);
}
DEBUG("saved memory from tags: %li\n", (long)sum);
}
static int resetVisitedFlag(char *key, TagTrackerItem *value, void *data) {
value->visited = 0;
return FALSE;
}
void resetVisitedFlagsInTagTracker(int type) {
if(!tagLists[type]) return;
g_tree_foreach(tagLists[type], (GTraverseFunc)resetVisitedFlag, NULL);
}
void visitInTagTracker(int type, char * str) {
TagTrackerItem * item;
if(!tagLists[type]) return;
if(!(item = g_tree_lookup(tagLists[type], str))) return;
item->visited = 1;
}
struct _PrintVisitedUserdata {
FILE *fp;
char *type;
};
static int printVisitedFlag(char *key, TagTrackerItem* value, struct _PrintVisitedUserdata *data) {
if(value->visited) myfprintf(data->fp, "%s: %s\n", data->type, key);
return FALSE;
}
void printVisitedInTagTracker(FILE * fp, int type) {
struct _PrintVisitedUserdata data = {fp, mpdTagItemKeys[type]};
if(!tagLists[type]) return;
g_tree_foreach( tagLists[type], (GTraverseFunc)printVisitedFlag, (void*)&data);
}
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