Mercurial > hg > octave-kai > gnulib-hg
annotate lib/c-strncasecmp.c @ 7304:1c4ed7637c24
Include <config.h> unconditionally.
| author | Bruno Haible <bruno@clisp.org> |
|---|---|
| date | Thu, 14 Sep 2006 14:18:36 +0000 |
| parents | dbf2af5391cd |
| children | e8d2c6fc33ad |
| rev | line source |
|---|---|
| 6359 | 1 /* c-strncasecmp.c -- case insensitive string comparator in C locale |
|
7304
1c4ed7637c24
Include <config.h> unconditionally.
Bruno Haible <bruno@clisp.org>
parents:
6359
diff
changeset
|
2 Copyright (C) 1998-1999, 2005-2006 Free Software Foundation, Inc. |
| 6359 | 3 |
| 4 This program is free software; you can redistribute it and/or modify | |
| 5 it under the terms of the GNU General Public License as published by | |
| 6 the Free Software Foundation; either version 2, or (at your option) | |
| 7 any later version. | |
| 8 | |
| 9 This program is distributed in the hope that it will be useful, | |
| 10 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 GNU General Public License for more details. | |
| 13 | |
| 14 You should have received a copy of the GNU General Public License | |
| 15 along with this program; if not, write to the Free Software Foundation, | |
| 16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ | |
| 17 | |
|
7304
1c4ed7637c24
Include <config.h> unconditionally.
Bruno Haible <bruno@clisp.org>
parents:
6359
diff
changeset
|
18 #include <config.h> |
| 6359 | 19 |
| 20 /* Specification. */ | |
| 21 #include "c-strcase.h" | |
| 22 | |
| 23 #include <limits.h> | |
| 24 | |
| 25 #include "c-ctype.h" | |
| 26 | |
| 27 int | |
| 28 c_strncasecmp (const char *s1, const char *s2, size_t n) | |
| 29 { | |
| 30 register const unsigned char *p1 = (const unsigned char *) s1; | |
| 31 register const unsigned char *p2 = (const unsigned char *) s2; | |
| 32 unsigned char c1, c2; | |
| 33 | |
| 34 if (p1 == p2 || n == 0) | |
| 35 return 0; | |
| 36 | |
| 37 do | |
| 38 { | |
| 39 c1 = c_tolower (*p1); | |
| 40 c2 = c_tolower (*p2); | |
| 41 | |
| 42 if (--n == 0 || c1 == '\0') | |
| 43 break; | |
| 44 | |
| 45 ++p1; | |
| 46 ++p2; | |
| 47 } | |
| 48 while (c1 == c2); | |
| 49 | |
| 50 if (UCHAR_MAX <= INT_MAX) | |
| 51 return c1 - c2; | |
| 52 else | |
| 53 /* On machines where 'char' and 'int' are types of the same size, the | |
| 54 difference of two 'unsigned char' values - including the sign bit - | |
| 55 doesn't fit in an 'int'. */ | |
| 56 return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0); | |
| 57 } |