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song_sticker: added song_sticker_find()

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This is a wrapper for sticker_find(), which looks up the song object.
This commit is contained in:
Max Kellermann 2009-04-01 18:44:26 +02:00
parent 3a4d20faa2
commit c51e1bf1c0
2 changed files with 76 additions and 0 deletions
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60
src/song_sticker.c
View File

@ -19,11 +19,13 @@
#include "song_sticker.h"
#include "song.h"
#include "directory.h"
#include "sticker.h"
#include <glib.h>
#include <assert.h>
#include <string.h>
char *
sticker_song_get_value(const struct song *song, const char *name)
@ -88,3 +90,61 @@ sticker_song_get(const struct song *song)
return sticker;
}
struct sticker_song_find_data {
struct directory *directory;
const char *base_uri;
size_t base_uri_length;
void (*func)(struct song *song, const char *value,
gpointer user_data);
gpointer user_data;
};
static void
sticker_song_find_cb(const char *uri, const char *value, gpointer user_data)
{
struct sticker_song_find_data *data = user_data;
struct song *song;
if (memcmp(uri, data->base_uri, data->base_uri_length) != 0)
/* should not happen, ignore silently */
return;
song = directory_lookup_song(data->directory,
uri + data->base_uri_length);
if (song != NULL)
data->func(song, value, data->user_data);
}
bool
sticker_song_find(struct directory *directory, const char *name,
void (*func)(struct song *song, const char *value,
gpointer user_data),
gpointer user_data)
{
struct sticker_song_find_data data = {
.directory = directory,
.func = func,
.user_data = user_data,
};
char *allocated;
bool success;
data.base_uri = directory_get_path(directory);
if (*data.base_uri != 0)
/* append slash to base_uri */
data.base_uri = allocated =
g_strconcat(data.base_uri, "/", NULL);
else
/* searching in root directory - no trailing slash */
allocated = NULL;
data.base_uri_length = strlen(data.base_uri);
success = sticker_find("song", data.base_uri, name,
sticker_song_find_cb, &data);
g_free(allocated);
return success;
}

16
src/song_sticker.h
View File

@ -24,6 +24,7 @@
#include <glib.h>
struct song;
struct directory;
struct sticker;
/**
@ -56,4 +57,19 @@ sticker_song_delete(const struct song *song);
struct sticker *
sticker_song_get(const struct song *song);
/**
* Finds stickers with the specified name below the specified
* directory.
*
* @param directory the base directory to search in
* @param name the name of the sticker
* @return true on success (even if no sticker was found), false on
* failure
*/
bool
sticker_song_find(struct directory *directory, const char *name,
void (*func)(struct song *song, const char *value,
gpointer user_data),
gpointer user_data);
#endif