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author | Paul Eggert <eggert@cs.ucla.edu> | 2012-07-06 15:19:44 -0700 |
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committer | Paul Eggert <eggert@cs.ucla.edu> | 2012-07-06 15:19:44 -0700 |
commit | 82fd0d8bed18ab961c9060325de4f17ed0ad94c9 (patch) | |
tree | 54bb34e8b4a5cecd6303d52d491035d988017cf4 /lib/c-strcasecmp.c | |
parent | 0d27a45e5883a9b4764422d4feaa95bd2f06701a (diff) | |
download | emacs-82fd0d8bed18ab961c9060325de4f17ed0ad94c9.tar.gz |
Add gnulib files for Bug#11786 fix.
Diffstat (limited to 'lib/c-strcasecmp.c')
-rw-r--r-- | lib/c-strcasecmp.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/lib/c-strcasecmp.c b/lib/c-strcasecmp.c new file mode 100644 index 00000000000..d8332caf839 --- /dev/null +++ b/lib/c-strcasecmp.c @@ -0,0 +1,56 @@ +/* c-strcasecmp.c -- case insensitive string comparator in C locale + Copyright (C) 1998-1999, 2005-2006, 2009-2012 Free Software Foundation, Inc. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 3, or (at your option) + any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, see <http://www.gnu.org/licenses/>. */ + +#include <config.h> + +/* Specification. */ +#include "c-strcase.h" + +#include <limits.h> + +#include "c-ctype.h" + +int +c_strcasecmp (const char *s1, const char *s2) +{ + register const unsigned char *p1 = (const unsigned char *) s1; + register const unsigned char *p2 = (const unsigned char *) s2; + unsigned char c1, c2; + + if (p1 == p2) + return 0; + + do + { + c1 = c_tolower (*p1); + c2 = c_tolower (*p2); + + if (c1 == '\0') + break; + + ++p1; + ++p2; + } + while (c1 == c2); + + if (UCHAR_MAX <= INT_MAX) + return c1 - c2; + else + /* On machines where 'char' and 'int' are types of the same size, the + difference of two 'unsigned char' values - including the sign bit - + doesn't fit in an 'int'. */ + return (c1 > c2 ? 1 : c1 < c2 ? -1 : 0); +} |