mirror of https://github.com/mpv-player/mpv
68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
|
/*
|
||
|
|
* This file is part of mpv.
|
||
|
|
*
|
||
|
|
* mpv is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU Lesser General Public
|
||
|
|
* License as published by the Free Software Foundation; either
|
||
|
|
* version 2.1 of the License, or (at your option) any later version.
|
||
|
|
*
|
||
|
|
* mpv 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 Lesser General Public License for more details.
|
||
|
|
*
|
||
|
|
* You should have received a copy of the GNU Lesser General Public
|
||
|
|
* License along with mpv. If not, see <http://www.gnu.org/licenses/>.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "misc/ctype.h"
|
||
|
|
|
||
|
|
#include "natural_sort.h"
|
||
|
|
|
||
|
|
// Comparison function for an ASCII-only "natural" sort. Case is ignored and
|
||
|
|
// numbers are ordered by value regardless of padding. Two filenames that differ
|
||
|
|
// only in the padding of numbers will be considered equal and end up in
|
||
|
|
// arbitrary order. Bytes outside of A-Z/a-z/0-9 will by sorted by byte value.
|
||
|
|
int mp_natural_sort_cmp(const char *name1, const char *name2)
|
||
|
|
{
|
||
|
|
while (name1[0] && name2[0]) {
|
||
|
|
if (mp_isdigit(name1[0]) && mp_isdigit(name2[0])) {
|
||
|
|
while (name1[0] == '0')
|
||
|
|
name1++;
|
||
|
|
while (name2[0] == '0')
|
||
|
|
name2++;
|
||
|
|
const char *end1 = name1, *end2 = name2;
|
||
|
|
while (mp_isdigit(*end1))
|
||
|
|
end1++;
|
||
|
|
while (mp_isdigit(*end2))
|
||
|
|
end2++;
|
||
|
|
// With padding stripped, a number with more digits is bigger.
|
||
|
|
if ((end1 - name1) < (end2 - name2))
|
||
|
|
return -1;
|
||
|
|
if ((end1 - name1) > (end2 - name2))
|
||
|
|
return 1;
|
||
|
|
// Same length, lexicographical works.
|
||
|
|
while (name1 < end1) {
|
||
|
|
if (name1[0] < name2[0])
|
||
|
|
return -1;
|
||
|
|
if (name1[0] > name2[0])
|
||
|
|
return 1;
|
||
|
|
name1++;
|
||
|
|
name2++;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (mp_tolower(name1[0]) < mp_tolower(name2[0]))
|
||
|
|
return -1;
|
||
|
|
if (mp_tolower(name1[0]) > mp_tolower(name2[0]))
|
||
|
|
return 1;
|
||
|
|
name1++;
|
||
|
|
name2++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (name2[0])
|
||
|
|
return -1;
|
||
|
|
if (name1[0])
|
||
|
|
return 1;
|
||
|
|
return 0;
|
||
|
|
}
|