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annotate lib/memcasecmp.c @ 14379:2330aac2ae54

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maint: adjust cpp indentation to reflect nesting depth I.e., in a block of code that begins with an unnested "#if", put one space between the "#" in column 1 and following token. For example, -#include <sys/vfs.h> +# include <sys/vfs.h> Do this only in .c files that are part of a module I maintain. * lib/linkat.c: Filter through cppi. * lib/nanosleep.c: Likewise. * lib/openat.c: Likewise. * lib/openat-die.c: Likewise. * lib/dup3.c: Likewise. * lib/fchownat.c: Likewise. * lib/flock.c: Likewise. * lib/fsync.c: Likewise. * lib/fts.c: Likewise. * lib/getpass.c: Likewise. * lib/gettimeofday.c: Likewise. * lib/userspec.c: Likewise. * Makefile (sc_cpp_indent_check): New rule, to check this.
author Jim Meyering <meyering@redhat.com>
date Sun, 20 Feb 2011 23:02:43 +0100
parents 97fc9a21a8fb
children b427a1938336
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1 /* Case-insensitive buffer comparator.
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2 Copyright (C) 1996-1997, 2000, 2003, 2006, 2009-2011 Free Software
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3 Foundation, Inc.
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation; either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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18 /* Written by Jim Meyering. */
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19
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20 #include <config.h>
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22 #include "memcasecmp.h"
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23
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24 #include <ctype.h>
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25 #include <limits.h>
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26
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27 /* Like memcmp, but ignore differences in case.
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28 Convert to upper case (not lower) before comparing so that
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29 join -i works with sort -f. */
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30
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31 int
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32 memcasecmp (const void *vs1, const void *vs2, size_t n)
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33 {
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34 size_t i;
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35 char const *s1 = vs1;
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36 char const *s2 = vs2;
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37 for (i = 0; i < n; i++)
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38 {
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39 unsigned char u1 = s1[i];
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40 unsigned char u2 = s2[i];
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41 int U1 = toupper (u1);
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42 int U2 = toupper (u2);
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43 int diff = (UCHAR_MAX <= INT_MAX ? U1 - U2
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44 : U1 < U2 ? -1 : U2 < U1);
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45 if (diff)
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46 return diff;
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47 }
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48 return 0;
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49 }