freebsd-dev/usr.bin/sort/vsort.c

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (C) 2012 Oleg Moskalenko <mom040267@gmail.com>
* Copyright (C) 2012 Gabor Kovesdan <gabor@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include "sort.h"
#include "vsort.h"
static inline bool
isdigit_clocale(wchar_t c)
{
return (c >= L'0' && c <= L'9');
}
static inline bool
isalpha_clocale(wchar_t c)
{
return ((c >= L'a' && c <= L'z') || (c >= L'A' && c <= L'Z'));
}
static inline bool
isalnum_clocale(wchar_t c)
{
return ((c >= L'a' && c <= L'z') || (c >= L'A' && c <= L'Z') ||
(c >= L'0' && c <= L'9'));
}
/*
* Find string suffix of format: (\.[A-Za-z~][A-Za-z0-9~]*)*$
* Set length of string before suffix.
*/
static void
find_suffix(bwstring_iterator si, bwstring_iterator se, size_t *len)
{
wchar_t c;
size_t clen;
bool expect_alpha, sfx;
sfx = false;
expect_alpha = false;
*len = 0;
clen = 0;
while ((si < se) && (c = bws_get_iter_value(si))) {
if (expect_alpha) {
expect_alpha = false;
if (!isalpha_clocale(c) && (c != L'~'))
sfx = false;
} else if (c == L'.') {
expect_alpha = true;
if (!sfx) {
sfx = true;
*len = clen;
}
} else if (!isalnum_clocale(c) && (c != L'~'))
sfx = false;
si = bws_iterator_inc(si, 1);
++clen;
}
/* This code must be here to make the implementation compatible
* with WORDING of GNU sort documentation.
* But the GNU sort implementation is not following its own
* documentation. GNU sort allows empty file extensions
* (just dot with nothing after); but the regular expression in
* their documentation does not allow empty file extensions.
* We chose to make our implementation compatible with GNU sort
* implementation. If they will ever fix their bug, this code
* must be uncommented. Or they may choose to fix the info page,
* then the code stays commented.
*
if (expect_alpha)
sfx = false;
*/
if (!sfx)
*len = clen;
}
static inline int
cmp_chars(wchar_t c1, wchar_t c2)
{
if (c1 == c2)
return (0);
if (c1 == L'~')
return (-1);
if (c2 == L'~')
return (+1);
if (isdigit_clocale(c1) || !c1)
return ((isdigit_clocale(c2) || !c2) ? 0 : -1);
if (isdigit_clocale(c2) || !c2)
return (+1);
if (isalpha_clocale(c1))
return ((isalpha_clocale(c2)) ? ((int) c1 - (int) c2) : -1);
if (isalpha_clocale(c2))
return (+1);
return ((int) c1 - (int) c2);
}
static int
cmpversions(bwstring_iterator si1, bwstring_iterator se1,
bwstring_iterator si2, bwstring_iterator se2)
{
int cmp, diff;
while ((si1 < se1) || (si2 < se2)) {
diff = 0;
while (((si1 < se1) &&
!isdigit_clocale(bws_get_iter_value(si1))) ||
((si2 < se2) && !isdigit_clocale(bws_get_iter_value(si2)))) {
wchar_t c1, c2;
c1 = (si1 < se1) ? bws_get_iter_value(si1) : 0;
c2 = (si2 < se2) ? bws_get_iter_value(si2) : 0;
cmp = cmp_chars(c1, c2);
if (cmp)
return (cmp);
if (si1 < se1)
si1 = bws_iterator_inc(si1, 1);
if (si2 < se2)
si2 = bws_iterator_inc(si2, 1);
}
while (bws_get_iter_value(si1) == L'0')
si1 = bws_iterator_inc(si1, 1);
while (bws_get_iter_value(si2) == L'0')
si2 = bws_iterator_inc(si2, 1);
while (isdigit_clocale(bws_get_iter_value(si1)) &&
isdigit_clocale(bws_get_iter_value(si2))) {
if (!diff)
diff = ((int)bws_get_iter_value(si1) -
(int)bws_get_iter_value(si2));
si1 = bws_iterator_inc(si1, 1);
si2 = bws_iterator_inc(si2, 1);
}
if (isdigit_clocale(bws_get_iter_value(si1)))
return (1);
if (isdigit_clocale(bws_get_iter_value(si2)))
return (-1);
if (diff)
return (diff);
}
return (0);
}
/*
* Compare two version strings
*/
int
vcmp(struct bwstring *s1, struct bwstring *s2)
{
bwstring_iterator si1, si2;
wchar_t c1, c2;
size_t len1, len2, slen1, slen2;
int cmp_bytes, cmp_res;
if (s1 == s2)
return (0);
cmp_bytes = bwscmp(s1, s2, 0);
if (cmp_bytes == 0)
return (0);
len1 = slen1 = BWSLEN(s1);
len2 = slen2 = BWSLEN(s2);
if (slen1 < 1)
return (-1);
if (slen2 < 1)
return (+1);
si1 = bws_begin(s1);
si2 = bws_begin(s2);
c1 = bws_get_iter_value(si1);
c2 = bws_get_iter_value(si2);
if (c1 == L'.' && (slen1 == 1))
return (-1);
if (c2 == L'.' && (slen2 == 1))
return (+1);
if (slen1 == 2 && c1 == L'.' &&
bws_get_iter_value(bws_iterator_inc(si1, 1)) == L'.')
return (-1);
if (slen2 == 2 && c2 == L'.' &&
bws_get_iter_value(bws_iterator_inc(si2, 1)) == L'.')
return (+1);
if (c1 == L'.' && c2 != L'.')
return (-1);
if (c1 != L'.' && c2 == L'.')
return (+1);
if (c1 == L'.' && c2 == L'.') {
si1 = bws_iterator_inc(si1, 1);
si2 = bws_iterator_inc(si2, 1);
}
find_suffix(si1, bws_end(s1), &len1);
find_suffix(si2, bws_end(s2), &len2);
if ((len1 == len2) && (bws_iterator_cmp(si1, si2, len1) == 0))
return (cmp_bytes);
cmp_res = cmpversions(si1, bws_iterator_inc(si1, len1), si2,
bws_iterator_inc(si2, len2));
if (cmp_res == 0)
cmp_res = cmp_bytes;
return (cmp_res);
}