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-rw-r--r--src/playlist_vector.c125
1 files changed, 125 insertions, 0 deletions
diff --git a/src/playlist_vector.c b/src/playlist_vector.c
new file mode 100644
index 000000000..7c1765a98
--- /dev/null
+++ b/src/playlist_vector.c
@@ -0,0 +1,125 @@
+/*
+ * Copyright (C) 2003-2010 The Music Player Daemon Project
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include "config.h"
+#include "playlist_vector.h"
+
+#include <assert.h>
+#include <string.h>
+#include <glib.h>
+
+static struct playlist_metadata *
+playlist_metadata_new(const char *name, time_t mtime)
+{
+ assert(name != NULL);
+
+ struct playlist_metadata *pm = g_slice_new(struct playlist_metadata);
+ pm->name = g_strdup(name);
+ pm->mtime = mtime;
+ return pm;
+}
+
+static void
+playlist_metadata_free(struct playlist_metadata *pm)
+{
+ assert(pm != NULL);
+ assert(pm->name != NULL);
+
+ g_free(pm->name);
+ g_slice_free(struct playlist_metadata, pm);
+}
+
+void
+playlist_vector_deinit(struct playlist_vector *pv)
+{
+ assert(pv != NULL);
+
+ while (pv->head != NULL) {
+ struct playlist_metadata *pm = pv->head;
+ pv->head = pm->next;
+ playlist_metadata_free(pm);
+ }
+}
+
+static struct playlist_metadata **
+playlist_vector_find_p(struct playlist_vector *pv, const char *name)
+{
+ assert(pv != NULL);
+ assert(name != NULL);
+
+ struct playlist_metadata **pmp = &pv->head;
+
+ for (;;) {
+ struct playlist_metadata *pm = *pmp;
+ if (pm == NULL)
+ return NULL;
+
+ if (strcmp(pm->name, name) == 0)
+ return pmp;
+
+ pmp = &pm->next;
+ }
+}
+
+struct playlist_metadata *
+playlist_vector_find(struct playlist_vector *pv, const char *name)
+{
+ struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
+ return pmp != NULL ? *pmp : NULL;
+}
+
+void
+playlist_vector_add(struct playlist_vector *pv,
+ const char *name, time_t mtime)
+{
+ struct playlist_metadata *pm = playlist_metadata_new(name, mtime);
+ pm->next = pv->head;
+ pv->head = pm;
+}
+
+bool
+playlist_vector_update_or_add(struct playlist_vector *pv,
+ const char *name, time_t mtime)
+{
+ struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
+ if (pmp != NULL) {
+ struct playlist_metadata *pm = *pmp;
+ if (mtime == pm->mtime)
+ return false;
+
+ pm->mtime = mtime;
+ } else
+ playlist_vector_add(pv, name, mtime);
+
+ return true;
+}
+
+bool
+playlist_vector_remove(struct playlist_vector *pv, const char *name)
+{
+ struct playlist_metadata **pmp = playlist_vector_find_p(pv, name);
+ if (pmp == NULL)
+ return false;
+
+ struct playlist_metadata *pm = *pmp;
+ *pmp = pm->next;
+
+ playlist_metadata_free(pm);
+ return true;
+}