diff options
author | Jim Meyering <jim@meyering.net> | 1999-01-02 15:55:52 +0000 |
---|---|---|
committer | Jim Meyering <jim@meyering.net> | 1999-01-02 15:55:52 +0000 |
commit | f4db32ef36d142d8daf86280989088ffbac84a2b (patch) | |
tree | 4f1a42facd935a0222ee32cd7426373ca28b3cce /lib | |
parent | b966f347eece08162d71a5beec2518eb32731267 (diff) | |
download | coreutils-f4db32ef36d142d8daf86280989088ffbac84a2b.tar.xz |
Add #ifdefs so it can be used for strncasecmp, too.
Diffstat (limited to 'lib')
-rw-r--r-- | lib/strcasecmp.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/lib/strcasecmp.c b/lib/strcasecmp.c new file mode 100644 index 000000000..0ae96276d --- /dev/null +++ b/lib/strcasecmp.c @@ -0,0 +1,63 @@ +/* strcasecmp.c -- case insensitive string comparator + Copyright (C) 1998, 1999 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 2, 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, write to the Free Software Foundation, + Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + +#if HAVE_CONFIG_H +# include <config.h> +#endif + +#ifdef LENGTH_LIMIT +# define STRXCASECMP_FUNCTION strncasecmp +# define STRXCASECMP_DECLARE_N , size_t n +# define LENGTH_LIMIT_EXPR(Expr) Expr +#else +# define STRXCASECMP_FUNCTION strcasecmp +# define STRXCASECMP_DECLARE_N /* empty */ +# define LENGTH_LIMIT_EXPR(Expr) 0 +#endif + +#include <sys/types.h> +#include <ctype.h> + +#define TOLOWER(Ch) (isupper (Ch) ? tolower (Ch) : (Ch)) + +/* Compare {{no more than N characters of }}strings S1 and S2, + ignoring case, returning less than, equal to or + greater than zero if S1 is lexicographically less + than, equal to or greater than S2. */ + +int +STRXCASECMP_FUNCTION (const char *s1, const char *s2 STRXCASECMP_DECLARE_N) +{ + 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 || LENGTH_LIMIT_EXPR (n == 0)) + return 0; + + do + { + c1 = TOLOWER (*p1++); + c2 = TOLOWER (*p2++); + + if (LENGTH_LIMIT_EXPR (--n == 0) || c1 == '\0') + break; + } + while (c1 == c2); + + return c1 - c2; +} |