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c66bbc9143
with the major functionality and optimizations by Oleg Moskalenko. It is compatible with the latest version of POSIX and the current GNU sort version that we have in base. Beside this, it implements all the functionality introduced in later versions of GNU sort. For now, it will be installed as "bsdsort", keeping GNU sort as the default sort implementation.
266 lines
6.2 KiB
C
266 lines
6.2 KiB
C
/*-
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* Copyright (C) 2012 Oleg Moskalenko <oleg.moskalenko@citrix.com>
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* Copyright (C) 2012 Gabor Kovesdan <gabor@FreeBSD.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include "sort.h"
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#include "vsort.h"
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static inline bool
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isdigit_clocale(wchar_t c)
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{
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return (c >= L'0' && c <= L'9');
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}
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static inline bool
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isalpha_clocale(wchar_t c)
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{
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return ((c >= L'a' && c <= L'z') || (c >= L'A' && c <= L'Z'));
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}
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static inline bool
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isalnum_clocale(wchar_t c)
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{
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return ((c >= L'a' && c <= L'z') || (c >= L'A' && c <= L'Z') ||
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(c >= L'0' && c <= L'9'));
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}
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/*
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* Find string suffix of format: (\.[A-Za-z~][A-Za-z0-9~]*)*$
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* Set length of string before suffix.
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*/
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static void
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find_suffix(bwstring_iterator si, bwstring_iterator se, size_t *len)
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{
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wchar_t c;
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size_t clen;
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bool expect_alpha, sfx;
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sfx = false;
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expect_alpha = false;
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*len = 0;
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clen = 0;
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while ((si < se) && (c = bws_get_iter_value(si))) {
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if (expect_alpha) {
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expect_alpha = false;
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if (!isalpha_clocale(c) && (c != L'~'))
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sfx = false;
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} else if (c == L'.') {
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expect_alpha = true;
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if (!sfx) {
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sfx = true;
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*len = clen;
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}
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} else if (!isalnum_clocale(c) && (c != L'~'))
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sfx = false;
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si = bws_iterator_inc(si, 1);
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++clen;
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}
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/* This code must be here to make the implementation compatible
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* with WORDING of GNU sort documentation.
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* But the GNU sort implementation is not following its own
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* documentation. GNU sort allows empty file extensions
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* (just dot with nothing after); but the regular expression in
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* their documentation does not allow empty file extensions.
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* We chose to make our implementation compatible with GNU sort
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* implementation. If they will ever fix their bug, this code
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* must be uncommented. Or they may choose to fix the info page,
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* then the code stays commented.
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*
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if (expect_alpha)
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sfx = false;
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*/
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if (!sfx)
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*len = clen;
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}
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static inline int
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cmp_chars(wchar_t c1, wchar_t c2)
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{
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if (c1 == c2)
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return (0);
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if (c1 == L'~')
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return (-1);
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if (c2 == L'~')
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return (+1);
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if (isdigit_clocale(c1) || !c1)
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return ((isdigit_clocale(c2) || !c2) ? 0 : -1);
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if (isdigit_clocale(c2) || !c2)
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return (+1);
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if (isalpha_clocale(c1))
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return ((isalpha_clocale(c2)) ? ((int) c1 - (int) c2) : -1);
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if (isalpha_clocale(c2))
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return (+1);
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return ((int) c1 - (int) c2);
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}
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static int
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cmpversions(bwstring_iterator si1, bwstring_iterator se1,
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bwstring_iterator si2, bwstring_iterator se2)
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{
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int cmp, diff;
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while ((si1 < se1) || (si2 < se2)) {
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diff = 0;
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while (((si1 < se1) &&
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!isdigit_clocale(bws_get_iter_value(si1))) ||
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((si2 < se2) && !isdigit_clocale(bws_get_iter_value(si2)))) {
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wchar_t c1, c2;
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c1 = (si1 < se1) ? bws_get_iter_value(si1) : 0;
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c2 = (si2 < se2) ? bws_get_iter_value(si2) : 0;
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cmp = cmp_chars(c1, c2);
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if (cmp)
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return (cmp);
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if (si1 < se1)
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si1 = bws_iterator_inc(si1, 1);
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if (si2 < se2)
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si2 = bws_iterator_inc(si2, 1);
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}
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while (bws_get_iter_value(si1) == L'0')
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si1 = bws_iterator_inc(si1, 1);
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while (bws_get_iter_value(si2) == L'0')
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si2 = bws_iterator_inc(si2, 1);
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while (isdigit_clocale(bws_get_iter_value(si1)) &&
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isdigit_clocale(bws_get_iter_value(si2))) {
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if (!diff)
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diff = ((int)bws_get_iter_value(si1) -
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(int)bws_get_iter_value(si2));
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si1 = bws_iterator_inc(si1, 1);
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si2 = bws_iterator_inc(si2, 1);
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}
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if (isdigit_clocale(bws_get_iter_value(si1)))
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return (1);
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if (isdigit_clocale(bws_get_iter_value(si2)))
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return (-1);
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if (diff)
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return (diff);
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}
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return (0);
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}
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/*
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* Compare two version strings
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*/
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int
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vcmp(struct bwstring *s1, struct bwstring *s2)
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{
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bwstring_iterator si1, si2;
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wchar_t c1, c2;
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size_t len1, len2, slen1, slen2;
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int cmp_bytes, cmp_res;
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if (s1 == s2)
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return (0);
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cmp_bytes = bwscmp(s1, s2, 0);
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if (cmp_bytes == 0)
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return (0);
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len1 = slen1 = BWSLEN(s1);
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len2 = slen2 = BWSLEN(s2);
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if (slen1 < 1)
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return (-1);
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if (slen2 < 1)
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return (+1);
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si1 = bws_begin(s1);
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si2 = bws_begin(s2);
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c1 = bws_get_iter_value(si1);
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c2 = bws_get_iter_value(si2);
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if (c1 == L'.' && (slen1 == 1))
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return (-1);
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if (c2 == L'.' && (slen2 == 1))
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return (+1);
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if (slen1 == 2 && c1 == L'.' &&
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bws_get_iter_value(bws_iterator_inc(si1, 1)) == L'.')
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return (-1);
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if (slen2 == 2 && c2 == L'.' &&
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bws_get_iter_value(bws_iterator_inc(si2, 1)) == L'.')
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return (+1);
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if (c1 == L'.' && c2 != L'.')
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return (-1);
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if (c1 != L'.' && c2 == L'.')
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return (+1);
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if (c1 == L'.' && c2 == L'.') {
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si1 = bws_iterator_inc(si1, 1);
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si2 = bws_iterator_inc(si2, 1);
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}
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find_suffix(si1, bws_end(s1), &len1);
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find_suffix(si2, bws_end(s2), &len2);
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if ((len1 == len2) && (bws_iterator_cmp(si1, si2, len1) == 0))
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return (cmp_bytes);
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cmp_res = cmpversions(si1, bws_iterator_inc(si1, len1), si2,
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bws_iterator_inc(si2, len2));
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if (cmp_res == 0)
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cmp_res = cmp_bytes;
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return (cmp_res);
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}
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