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-rw-r--r--string/strncase.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/string/strncase.c b/string/strncase.c
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+++ b/string/strncase.c
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+/* Compare at most N characters of two strings without taking care for
+ the case.
+ Copyright (C) 1992, 1996, 1997, 2001, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+#include <ctype.h>
+
+#ifndef weak_alias
+# define __strncasecmp strncasecmp
+# define TOLOWER(Ch) tolower (Ch)
+#else
+# include <locale/localeinfo.h>
+# ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# define __strncasecmp __strncasecmp_l
+# endif
+# define TOLOWER(Ch) __tolower_l ((Ch), loc)
+#endif
+
+#ifdef USE_IN_EXTENDED_LOCALE_MODEL
+# define LOCALE_PARAM , loc
+# define LOCALE_PARAM_DECL __locale_t loc;
+#else
+# define LOCALE_PARAM
+# define LOCALE_PARAM_DECL
+#endif
+
+/* Compare no more than N characters of 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
+__strncasecmp (s1, s2, n LOCALE_PARAM)
+ const char *s1;
+ const char *s2;
+ size_t n;
+ LOCALE_PARAM_DECL
+{
+#if defined _LIBC && !defined USE_IN_EXTENDED_LOCALE_MODEL
+ __locale_t loc = _NL_CURRENT_LOCALE;
+#endif
+ const unsigned char *p1 = (const unsigned char *) s1;
+ const unsigned char *p2 = (const unsigned char *) s2;
+ int result;
+
+ if (p1 == p2 || n == 0)
+ return 0;
+
+ while ((result = TOLOWER (*p1) - TOLOWER (*p2++)) == 0)
+ if (*p1++ == '\0' || --n == 0)
+ break;
+
+ return result;
+}
+#ifndef __strncasecmp
+weak_alias (__strncasecmp, strncasecmp)
+#endif