now we only allocate unique metadata items

git-svn-id: https://svn.musicpd.org/mpd/branches/r2562-metadata-handling-rewrite@2568 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 50 insertions, 0 deletions

diff --git a/src/tagTracker.c b/src/tagTracker.c
new file mode 100644
index 000000000..fec96550a
--- /dev/null
+++ b/src/tagTracker.c
@@ -0,0 +1,50 @@
+#include "tagTracker.h"
+
+#include "list.h"
+
+static List * tagLists[TAG_NUM_OF_ITEM_TYPES] =
+{
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL,
+	NULL
+};
+
+char * getTagItemString(int type, char * string) {
+	ListNode * node;
+	
+	if(tagLists[type] == NULL) {
+		tagLists[type] = makeList(NULL);
+	}
+
+	if((node = findNodeInList(tagLists[type], string))) {
+		(*((int *)node->data))++;
+	}
+	else {
+		int * intPtr = malloc(sizeof(int));
+		*intPtr = 1;
+		node = insertInList(tagLists[type], string, intPtr);
+	}
+
+	return node->key;
+}
+
+void removeTagItemString(int type, char * string) {
+	ListNode * node;
+
+	if(tagLists[type] == NULL) return;
+
+	if((node = findNodeInList(tagLists[type], string))) {
+		int * countPtr = node->data;
+		*countPtr--;
+		if(*countPtr <= 0) deleteNodeFromList(tagLists[type], node);
+	}
+
+	if(tagLists[type]->numberOfNodes == 0) {
+		freeList(tagLists[type]);
+		tagLists[type] = NULL;
+	}
+}