RetroArch/playlist.c

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/* RetroArch - A frontend for libretro.
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* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
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* Copyright (C) 2011-2016 - Daniel De Matteis
* Copyright (C) 2013-2014 - Jason Fetters
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*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <boolean.h>
#include <compat/posix_string.h>
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#include <string/stdstring.h>
#include "playlist.h"
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#include "verbosity.h"
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#ifndef PLAYLIST_ENTRIES
#define PLAYLIST_ENTRIES 6
#endif
struct content_playlist_entry
{
char *path;
char *label;
char *core_path;
char *core_name;
char *db_name;
char *crc32;
};
struct content_playlist
{
struct content_playlist_entry *entries;
size_t size;
size_t cap;
char *conf_path;
};
/**
* content_playlist_get_index:
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* @playlist : Playlist handle.
* @idx : Index of playlist entry.
* @path : Path of playlist entry.
* @core_path : Core path of playlist entry.
* @core_name : Core name of playlist entry.
*
* Gets values of playlist index:
**/
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void content_playlist_get_index(content_playlist_t *playlist,
size_t idx,
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const char **path, const char **label,
const char **core_path, const char **core_name,
const char **crc32,
const char **db_name)
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{
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if (!playlist)
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return;
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if (path)
*path = playlist->entries[idx].path;
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if (label)
*label = playlist->entries[idx].label;
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if (core_path)
*core_path = playlist->entries[idx].core_path;
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if (core_name)
*core_name = playlist->entries[idx].core_name;
if (db_name)
*db_name = playlist->entries[idx].db_name;
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if (crc32)
*crc32 = playlist->entries[idx].crc32;
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}
void content_playlist_get_index_by_path(content_playlist_t *playlist,
const char *search_path,
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char **path, char **label,
char **core_path, char **core_name,
char **crc32,
char **db_name)
{
size_t i;
if (!playlist)
return;
for (i = 0; i < playlist->size; i++)
{
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if (!string_is_equal(playlist->entries[i].path, search_path))
continue;
if (path)
*path = playlist->entries[i].path;
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if (label)
*label = playlist->entries[i].label;
if (core_path)
*core_path = playlist->entries[i].core_path;
if (core_name)
*core_name = playlist->entries[i].core_name;
if (db_name)
*db_name = playlist->entries[i].db_name;
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if (crc32)
*crc32 = playlist->entries[i].crc32;
break;
}
}
bool content_playlist_entry_exists(content_playlist_t *playlist,
const char *path,
const char *crc32)
{
size_t i;
if (!playlist)
return false;
for (i = 0; i < playlist->size; i++)
if (string_is_equal(playlist->entries[i].path, path))
return true;
return false;
}
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/**
* content_playlist_free_entry:
* @entry : Playlist entry handle.
*
* Frees playlist entry.
**/
static void content_playlist_free_entry(content_playlist_entry_t *entry)
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{
if (!entry)
return;
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if (entry->path)
free(entry->path);
entry->path = NULL;
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if (entry->label)
free(entry->label);
entry->label = NULL;
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if (entry->core_path)
free(entry->core_path);
entry->core_path = NULL;
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if (entry->core_name)
free(entry->core_name);
entry->core_name = NULL;
if (entry->db_name)
free(entry->db_name);
entry->core_name = NULL;
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if (entry->crc32)
free(entry->crc32);
entry->crc32 = NULL;
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memset(entry, 0, sizeof(*entry));
}
void content_playlist_update(content_playlist_t *playlist, size_t idx,
const char *path, const char *label,
const char *core_path, const char *core_name,
const char *crc32,
const char *db_name)
{
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content_playlist_entry_t *entry = NULL;
if (!playlist)
return;
if (idx > playlist->size)
return;
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entry = &playlist->entries[idx];
if (!entry)
return;
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entry->path = path ? strdup(path) : entry->path;
entry->label = label ? strdup(label) : entry->label;
entry->core_path = core_path ? strdup(core_path) : entry->core_path;
entry->core_name = core_name ? strdup(core_name) : entry->core_name;
entry->db_name = db_name ? strdup(db_name) : entry->db_name;
entry->crc32 = crc32 ? strdup(crc32) : entry->crc32;
}
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/**
* content_playlist_push:
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* @playlist : Playlist handle.
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* @path : Path of new playlist entry.
* @core_path : Core path of new playlist entry.
* @core_name : Core name of new playlist entry.
*
* Push entry to top of playlist.
**/
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void content_playlist_push(content_playlist_t *playlist,
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const char *path, const char *label,
const char *core_path, const char *core_name,
const char *crc32,
const char *db_name)
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{
size_t i;
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if (!playlist)
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return;
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if (!core_path || !*core_path || !core_name || !*core_name)
{
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RARCH_ERR("cannot push NULL or empty core info into the playlist.\n");
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return;
}
if (path && !*path)
path = NULL;
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for (i = 0; i < playlist->size; i++)
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{
content_playlist_entry_t tmp;
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bool equal_path = (!path && !playlist->entries[i].path) ||
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(path && playlist->entries[i].path &&
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string_is_equal(path,playlist->entries[i].path));
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/* Core name can have changed while still being the same core.
* Differentiate based on the core path only. */
if (!equal_path)
continue;
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if (!string_is_equal(playlist->entries[i].core_path, core_path))
continue;
/* If top entry, we don't want to push a new entry since
* the top and the entry to be pushed are the same. */
if (i == 0)
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return;
/* Seen it before, bump to top. */
tmp = playlist->entries[i];
memmove(playlist->entries + 1, playlist->entries,
i * sizeof(content_playlist_entry_t));
playlist->entries[0] = tmp;
return;
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}
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if (playlist->size == playlist->cap)
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{
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content_playlist_free_entry(&playlist->entries[playlist->cap - 1]);
playlist->size--;
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}
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memmove(playlist->entries + 1, playlist->entries,
(playlist->cap - 1) * sizeof(content_playlist_entry_t));
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playlist->entries[0].path = path ? strdup(path) : NULL;
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playlist->entries[0].label = label ? strdup(label) : NULL;
playlist->entries[0].core_path = core_path ? strdup(core_path) : NULL;
playlist->entries[0].core_name = core_name ? strdup(core_name) : NULL;
playlist->entries[0].db_name = db_name ? strdup(db_name) : NULL;
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playlist->entries[0].crc32 = crc32 ? strdup(crc32) : NULL;
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playlist->size++;
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}
void content_playlist_write_file(content_playlist_t *playlist)
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{
size_t i;
FILE *file = NULL;
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if (!playlist)
return;
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file = fopen(playlist->conf_path, "w");
if (!file)
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return;
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for (i = 0; i < playlist->size; i++)
fprintf(file, "%s\n%s\n%s\n%s\n%s\n%s\n",
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playlist->entries[i].path ? playlist->entries[i].path : "",
playlist->entries[i].label ? playlist->entries[i].label : "",
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playlist->entries[i].core_path,
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playlist->entries[i].core_name,
playlist->entries[i].crc32 ? playlist->entries[i].crc32 : "",
playlist->entries[i].db_name ? playlist->entries[i].db_name : ""
);
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fclose(file);
}
/**
* content_playlist_free:
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* @playlist : Playlist handle.
*
* Frees playlist handle.
*/
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void content_playlist_free(content_playlist_t *playlist)
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{
size_t i;
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if (!playlist)
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return;
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if (playlist->conf_path)
free(playlist->conf_path);
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playlist->conf_path = NULL;
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for (i = 0; i < playlist->cap; i++)
content_playlist_free_entry(&playlist->entries[i]);
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free(playlist->entries);
playlist->entries = NULL;
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free(playlist);
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}
/**
* content_playlist_clear:
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* @playlist : Playlist handle.
*
* Clears all playlist entries in playlist.
**/
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void content_playlist_clear(content_playlist_t *playlist)
{
size_t i;
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if (!playlist)
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return;
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for (i = 0; i < playlist->cap; i++)
content_playlist_free_entry(&playlist->entries[i]);
playlist->size = 0;
}
/**
* content_playlist_size:
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* @playlist : Playlist handle.
*
* Gets size of playlist.
* Returns: size of playlist.
**/
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size_t content_playlist_size(content_playlist_t *playlist)
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{
if (!playlist)
return 0;
return playlist->size;
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}
const char *content_playlist_entry_get_label(const content_playlist_entry_t *entry)
{
if (!entry)
return NULL;
return entry->label;
}
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static bool content_playlist_read_file(
content_playlist_t *playlist, const char *path)
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{
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unsigned i;
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char buf[PLAYLIST_ENTRIES][1024] = {{0}};
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content_playlist_entry_t *entry = NULL;
char *last = NULL;
FILE *file = fopen(path, "r");
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/* If playlist file does not exist,
* create an empty playlist instead.
*/
if (!file)
return true;
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for (playlist->size = 0; playlist->size < playlist->cap; )
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{
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for (i = 0; i < PLAYLIST_ENTRIES; i++)
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{
*buf[i] = '\0';
if (!fgets(buf[i], sizeof(buf[i]), file))
goto end;
last = strrchr(buf[i], '\n');
if (last)
*last = '\0';
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}
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entry = &playlist->entries[playlist->size];
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if (!*buf[2] || !*buf[3])
continue;
if (*buf[0])
entry->path = strdup(buf[0]);
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if (*buf[1])
entry->label = strdup(buf[1]);
entry->core_path = strdup(buf[2]);
entry->core_name = strdup(buf[3]);
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if (*buf[4])
entry->crc32 = strdup(buf[4]);
if (*buf[5])
entry->db_name = strdup(buf[5]);
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playlist->size++;
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}
end:
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fclose(file);
return true;
}
/**
* content_playlist_init:
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* @path : Path to playlist contents file.
* @size : Maximum capacity of playlist size.
*
* Creates and initializes a playlist.
*
* Returns: handle to new playlist if successful, otherwise NULL
**/
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content_playlist_t *content_playlist_init(const char *path, size_t size)
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{
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content_playlist_t *playlist = (content_playlist_t*)
calloc(1, sizeof(*playlist));
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if (!playlist)
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return NULL;
playlist->entries = (content_playlist_entry_t*)calloc(size,
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sizeof(*playlist->entries));
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if (!playlist->entries)
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goto error;
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playlist->cap = size;
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content_playlist_read_file(playlist, path);
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playlist->conf_path = strdup(path);
return playlist;
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error:
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content_playlist_free(playlist);
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return NULL;
}
void content_playlist_qsort(content_playlist_t *playlist, content_playlist_sort_fun_t *fn)
{
qsort(playlist->entries, playlist->size, sizeof(content_playlist_entry_t),
(int (*)(const void *, const void *))fn);
}