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Diffstat (limited to '')
-rw-r--r-- | src/playlist_vector.c | 125 |
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; +} |