168 lines
3.9 KiB
C++
168 lines
3.9 KiB
C++
/*
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* Copyright (C) 2003-2012 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#include "config.h"
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#include "SongFilter.hxx"
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#include "path.h"
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#include "song.h"
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#include "tag.h"
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#include <glib.h>
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#include <assert.h>
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#include <stdlib.h>
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#define LOCATE_TAG_FILE_KEY "file"
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#define LOCATE_TAG_FILE_KEY_OLD "filename"
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#define LOCATE_TAG_ANY_KEY "any"
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unsigned
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locate_parse_type(const char *str)
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{
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if (0 == g_ascii_strcasecmp(str, LOCATE_TAG_FILE_KEY) ||
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0 == g_ascii_strcasecmp(str, LOCATE_TAG_FILE_KEY_OLD))
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return LOCATE_TAG_FILE_TYPE;
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if (0 == g_ascii_strcasecmp(str, LOCATE_TAG_ANY_KEY))
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return LOCATE_TAG_ANY_TYPE;
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return tag_name_parse_i(str);
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}
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SongFilter::Item::Item(unsigned _tag, const char *_value, bool _fold_case)
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:tag(_tag), fold_case(_fold_case),
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value(fold_case
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? g_utf8_casefold(_value, -1)
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: g_strdup(_value))
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{
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}
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SongFilter::Item::~Item()
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{
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g_free(value);
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}
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bool
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SongFilter::Item::StringMatch(const char *s) const
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{
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assert(value != nullptr);
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assert(s != nullptr);
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if (fold_case) {
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char *p = g_utf8_casefold(s, -1);
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const bool result = strstr(p, value) != NULL;
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g_free(p);
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return result;
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} else {
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return strcmp(s, value) == 0;
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}
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}
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bool
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SongFilter::Item::Match(const tag_item &item) const
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{
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return (tag == LOCATE_TAG_ANY_TYPE || (unsigned)item.type == tag) &&
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StringMatch(item.value);
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}
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bool
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SongFilter::Item::Match(const struct tag &_tag) const
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{
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bool visited_types[TAG_NUM_OF_ITEM_TYPES];
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std::fill(visited_types, visited_types + TAG_NUM_OF_ITEM_TYPES, false);
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for (unsigned i = 0; i < _tag.num_items; i++) {
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visited_types[_tag.items[i]->type] = true;
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if (Match(*_tag.items[i]))
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return true;
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}
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/** If the search critieron was not visited during the sweep
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* through the song's tag, it means this field is absent from
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* the tag or empty. Thus, if the searched string is also
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* empty (first char is a \0), then it's a match as well and
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* we should return true.
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*/
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if (*value == 0 && tag < TAG_NUM_OF_ITEM_TYPES &&
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!visited_types[tag])
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return true;
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return false;
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}
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bool
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SongFilter::Item::Match(const song &song) const
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{
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if (tag == LOCATE_TAG_FILE_TYPE || tag == LOCATE_TAG_ANY_TYPE) {
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char *uri = song_get_uri(&song);
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const bool result = StringMatch(uri);
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g_free(uri);
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if (result || tag == LOCATE_TAG_FILE_TYPE)
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return result;
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}
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return song.tag != NULL && Match(*song.tag);
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}
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SongFilter::SongFilter(unsigned tag, const char *value, bool fold_case)
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{
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items.push_back(Item(tag, value, fold_case));
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}
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SongFilter::~SongFilter()
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{
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/* this destructor exists here just so it won't get inlined */
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}
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bool
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SongFilter::Parse(const char *tag_string, const char *value, bool fold_case)
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{
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unsigned tag = locate_parse_type(tag_string);
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if (tag == TAG_NUM_OF_ITEM_TYPES)
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return false;
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items.push_back(Item(tag, value, fold_case));
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return true;
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}
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bool
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SongFilter::Parse(unsigned argc, char *argv[], bool fold_case)
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{
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if (argc == 0 || argc % 2 != 0)
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return false;
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for (unsigned i = 0; i < argc; i += 2)
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if (!Parse(argv[i], argv[i + 1], fold_case))
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return false;
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return true;
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}
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bool
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SongFilter::Match(const song &song) const
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{
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for (const auto &i : items)
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if (!i.Match(song))
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return false;
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return true;
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}
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