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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 "Song.hxx"
#include "Tag.hxx"
#include <glib.h>
#include <assert.h>
#include <string.h>
#include <stdlib.h>
#define LOCATE_TAG_FILE_KEY "file"
#define LOCATE_TAG_FILE_KEY_OLD "filename"
#define LOCATE_TAG_ANY_KEY "any"
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);
}
SongFilter::Item::Item(unsigned _tag, const char *_value, bool _fold_case)
:tag(_tag), fold_case(_fold_case),
value(fold_case
? g_utf8_casefold(_value, -1)
: g_strdup(_value))
{
}
SongFilter::Item::~Item()
{
g_free(value);
}
bool
SongFilter::Item::StringMatch(const char *s) const
{
assert(value != nullptr);
assert(s != nullptr);
if (fold_case) {
char *p = g_utf8_casefold(s, -1);
const bool result = strstr(p, value) != NULL;
g_free(p);
return result;
} else {
return strcmp(s, value) == 0;
}
}
bool
SongFilter::Item::Match(const TagItem &item) const
{
return (tag == LOCATE_TAG_ANY_TYPE || (unsigned)item.type == tag) &&
StringMatch(item.value);
}
bool
SongFilter::Item::Match(const Tag &_tag) const
{
bool visited_types[TAG_NUM_OF_ITEM_TYPES];
std::fill(visited_types, visited_types + TAG_NUM_OF_ITEM_TYPES, false);
for (unsigned i = 0; i < _tag.num_items; i++) {
visited_types[_tag.items[i]->type] = true;
if (Match(*_tag.items[i]))
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 (*value == 0 && tag < TAG_NUM_OF_ITEM_TYPES &&
!visited_types[tag])
return true;
return false;
}
bool
SongFilter::Item::Match(const Song &song) const
{
if (tag == LOCATE_TAG_FILE_TYPE || tag == LOCATE_TAG_ANY_TYPE) {
char *uri = song.GetURI();
const bool result = StringMatch(uri);
g_free(uri);
if (result || tag == LOCATE_TAG_FILE_TYPE)
return result;
}
return song.tag != NULL && Match(*song.tag);
}
SongFilter::SongFilter(unsigned tag, const char *value, bool fold_case)
{
items.push_back(Item(tag, value, fold_case));
}
SongFilter::~SongFilter()
{
/* this destructor exists here just so it won't get inlined */
}
bool
SongFilter::Parse(const char *tag_string, const char *value, bool fold_case)
{
unsigned tag = locate_parse_type(tag_string);
if (tag == TAG_NUM_OF_ITEM_TYPES)
return false;
items.push_back(Item(tag, value, fold_case));
return true;
}
bool
SongFilter::Parse(unsigned argc, char *argv[], bool fold_case)
{
if (argc == 0 || argc % 2 != 0)
return false;
for (unsigned i = 0; i < argc; i += 2)
if (!Parse(argv[i], argv[i + 1], fold_case))
return false;
return true;
}
bool
SongFilter::Match(const Song &song) const
{
for (const auto &i : items)
if (!i.Match(song))
return false;
return true;
}
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