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93 lines
1.9 KiB
C++
93 lines
1.9 KiB
C++
// SPDX-License-Identifier: GPL-2.0-or-later
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// Copyright The Music Player Daemon Project
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#include "SongSort.hxx"
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#include "Song.hxx"
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#include "tag/Tag.hxx"
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#include "lib/icu/Collate.hxx"
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#include "util/IntrusiveList.hxx"
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#include "util/SortList.hxx"
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#include <stdlib.h>
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static int
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compare_utf8_string(const char *a, const char *b) noexcept
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{
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if (a == nullptr)
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return b == nullptr ? 0 : -1;
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if (b == nullptr)
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return 1;
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return IcuCollate(a, b);
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}
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/**
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* Compare two string tag values, ignoring case. Either one may be
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* nullptr.
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*/
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static int
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compare_string_tag_item(const Tag &a, const Tag &b, TagType type) noexcept
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{
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return compare_utf8_string(a.GetValue(type),
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b.GetValue(type));
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}
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/**
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* Compare two tag values which should contain an integer value
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* (e.g. disc or track number). Either one may be nullptr.
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*/
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static int
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compare_number_string(const char *a, const char *b) noexcept
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{
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long ai = a == nullptr ? 0 : strtol(a, nullptr, 10);
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long bi = b == nullptr ? 0 : strtol(b, nullptr, 10);
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if (ai <= 0)
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return bi <= 0 ? 0 : -1;
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if (bi <= 0)
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return 1;
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return ai - bi;
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}
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static int
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compare_tag_item(const Tag &a, const Tag &b, TagType type) noexcept
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{
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return compare_number_string(a.GetValue(type),
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b.GetValue(type));
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}
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/* Only used for sorting/searchin a songvec, not general purpose compares */
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[[gnu::pure]]
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static bool
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song_cmp(const Song &a, const Song &b) noexcept
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{
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int ret;
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/* first sort by album */
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ret = compare_string_tag_item(a.tag, b.tag, TAG_ALBUM);
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if (ret != 0)
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return ret < 0;
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/* then sort by disc */
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ret = compare_tag_item(a.tag, b.tag, TAG_DISC);
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if (ret != 0)
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return ret < 0;
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/* then by track number */
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ret = compare_tag_item(a.tag, b.tag, TAG_TRACK);
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if (ret != 0)
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return ret < 0;
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/* still no difference? compare file name */
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return IcuCollate(a.filename, b.filename) < 0;
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}
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void
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song_list_sort(IntrusiveList<Song> &songs) noexcept
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{
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SortList(songs, song_cmp);
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}
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