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-rw-r--r--src/songvec.c46
1 files changed, 46 insertions, 0 deletions
diff --git a/src/songvec.c b/src/songvec.c
index 929eaea47..ac6e97953 100644
--- a/src/songvec.c
+++ b/src/songvec.c
@@ -1,5 +1,6 @@
#include "songvec.h"
#include "song.h"
+#include "tag.h"
#include <glib.h>
@@ -9,11 +10,56 @@
static GMutex *nr_lock = NULL;
+/**
+ * Compare two tag values which should contain an integer value
+ * (e.g. disc or track number). Either one may be NULL.
+ */
+static int
+compare_number_string(const char *a, const char *b)
+{
+ long ai = a == NULL ? 0 : strtol(a, NULL, 10);
+ long bi = b == NULL ? 0 : strtol(b, NULL, 10);
+
+ if (ai <= 0)
+ return bi <= 0 ? 0 : -1;
+
+ if (bi <= 0)
+ return 1;
+
+ return ai - bi;
+}
+
+static int
+compare_tag_item(const struct tag *a, const struct tag *b, enum tag_type type)
+{
+ if (a == NULL)
+ return b == NULL ? 0 : -1;
+
+ if (b == NULL)
+ return 1;
+
+ return compare_number_string(tag_get_value(a, type),
+ tag_get_value(b, type));
+}
+
/* Only used for sorting/searchin a songvec, not general purpose compares */
static int songvec_cmp(const void *s1, const void *s2)
{
const struct song *a = ((const struct song * const *)s1)[0];
const struct song *b = ((const struct song * const *)s2)[0];
+ int ret;
+
+ /* first sort by disc */
+ ret = compare_tag_item(a->tag, b->tag, TAG_ITEM_DISC);
+ if (ret != 0)
+ return ret;
+
+ /* then by track number */
+ ret = compare_tag_item(a->tag, b->tag, TAG_ITEM_TRACK);
+ if (ret != 0)
+ return ret;
+
+ /* still no difference? compare file name */
return g_utf8_collate(a->url, b->url);
}