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/*
* Copyright (C) 2003-2012 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 "SongFilter.hxx"
#include "path.h"
#include "song.h"
extern "C" {
#include "tag.h"
}
#include <glib.h>
#include <assert.h>
#include <stdlib.h>
#define LOCATE_TAG_FILE_KEY "file"
#define LOCATE_TAG_FILE_KEY_OLD "filename"
#define LOCATE_TAG_ANY_KEY "any"
/* struct used for search, find, list queries */
struct locate_item {
uint8_t tag;
bool fold_case;
/* what we are looking for */
char *needle;
};
/**
* An array of struct locate_item objects.
*/
struct locate_item_list {
/** number of items */
unsigned length;
/** this is a variable length array */
struct locate_item items[1];
};
unsigned
locate_parse_type(const char *str)
{
if (0 == g_ascii_strcasecmp(str, LOCATE_TAG_FILE_KEY) ||
0 == g_ascii_strcasecmp(str, LOCATE_TAG_FILE_KEY_OLD))
return LOCATE_TAG_FILE_TYPE;
if (0 == g_ascii_strcasecmp(str, LOCATE_TAG_ANY_KEY))
return LOCATE_TAG_ANY_TYPE;
return tag_name_parse_i(str);
}
static bool
locate_item_init(struct locate_item *item,
const char *type_string, const char *needle,
bool fold_case)
{
item->tag = locate_parse_type(type_string);
if (item->tag == TAG_NUM_OF_ITEM_TYPES)
return false;
item->fold_case = fold_case;
item->needle = fold_case
? g_utf8_casefold(needle, -1)
: g_strdup(needle);
return true;
}
void
locate_item_list_free(struct locate_item_list *list)
{
for (unsigned i = 0; i < list->length; ++i)
g_free(list->items[i].needle);
g_free(list);
}
static struct locate_item_list *
locate_item_list_new(unsigned length)
{
struct locate_item_list *list = (struct locate_item_list *)
g_malloc(sizeof(*list) - sizeof(list->items[0]) +
length * sizeof(list->items[0]));
list->length = length;
return list;
}
struct locate_item_list *
locate_item_list_new_single(unsigned tag, const char *needle)
{
struct locate_item_list *list = locate_item_list_new(1);
list->items[0].tag = tag;
list->items[0].fold_case = false;
list->items[0].needle = g_strdup(needle);
return list;
}
struct locate_item_list *
locate_item_list_parse(char *argv[], unsigned argc, bool fold_case)
{
if (argc == 0 || argc % 2 != 0)
return NULL;
struct locate_item_list *list = locate_item_list_new(argc / 2);
for (unsigned i = 0; i < list->length; ++i) {
if (!locate_item_init(&list->items[i], argv[i * 2],
argv[i * 2 + 1], fold_case)) {
locate_item_list_free(list);
return NULL;
}
}
return list;
}
gcc_pure
static bool
locate_string_match(const struct locate_item *item, const char *value)
{
assert(item != NULL);
assert(value != NULL);
if (item->fold_case) {
char *p = g_utf8_casefold(value, -1);
const bool result = strstr(p, item->needle) != NULL;
g_free(p);
return result;
} else {
return strcmp(value, item->needle) == 0;
}
}
gcc_pure
static bool
locate_tag_match(const struct locate_item *item, const struct tag *tag)
{
assert(item != NULL);
assert(tag != NULL);
bool visited_types[TAG_NUM_OF_ITEM_TYPES];
memset(visited_types, 0, sizeof(visited_types));
for (unsigned i = 0; i < tag->num_items; i++) {
visited_types[tag->items[i]->type] = true;
if (item->tag != LOCATE_TAG_ANY_TYPE &&
tag->items[i]->type != item->tag)
continue;
if (locate_string_match(item, tag->items[i]->value))
return true;
}
/** If the search critieron was not visited during the sweep
* through the song's tag, it means this field is absent from
* the tag or empty. Thus, if the searched string is also
* empty (first char is a \0), then it's a match as well and
* we should return true.
*/
if (*item->needle == 0 && item->tag != LOCATE_TAG_ANY_TYPE &&
!visited_types[item->tag])
return true;
return false;
}
gcc_pure
static bool
locate_song_match(const struct locate_item *item, const struct song *song)
{
if (item->tag == LOCATE_TAG_FILE_TYPE ||
item->tag == LOCATE_TAG_ANY_TYPE) {
char *uri = song_get_uri(song);
const bool result = locate_string_match(item, uri);
g_free(uri);
if (result || item->tag == LOCATE_TAG_FILE_TYPE)
return result;
}
return song->tag != NULL && locate_tag_match(item, song->tag);
}
bool
locate_list_song_match(const struct song *song,
const struct locate_item_list *criteria)
{
for (unsigned i = 0; i < criteria->length; i++)
if (!locate_song_match(&criteria->items[i], song))
return false;
return true;
}
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