newlib-2.4.0: wide character strings

git-svn-id: svn://kolibrios.org@6557 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/libc/string/wcscasecmp.c

@@ -0,0 +1,56 @@
+/*
+FUNCTION
+	<<wcscasecmp>>---case-insensitive wide character string compare
+	
+INDEX
+	wcscasecmp
+
+ANSI_SYNOPSIS
+	#include <wchar.h>
+	int wcscasecmp(const wchar_t *<[a]>, const wchar_t *<[b]>);
+
+TRAD_SYNOPSIS
+	#include <wchar.h>
+	int wcscasecmp(<[a]>, <[b]>)
+	wchar_t *<[a]>;
+	wchar_t *<[b]>;
+
+DESCRIPTION
+	<<wcscasecmp>> compares the wide character string at <[a]> to
+	the wide character string at <[b]> in a case-insensitive manner.
+
+RETURNS 
+
+	If <<*<[a]>>> sorts lexicographically after <<*<[b]>>> (after
+	both are converted to uppercase), <<wcscasecmp>> returns a
+	number greater than zero.  If the two strings match,
+	<<wcscasecmp>> returns zero.  If <<*<[a]>>> sorts
+	lexicographically before <<*<[b]>>>, <<wcscasecmp>> returns a
+	number less than zero.
+
+PORTABILITY
+POSIX-1.2008
+
+<<wcscasecmp>> requires no supporting OS subroutines. It uses
+tolower() from elsewhere in this library.
+
+QUICKREF
+	wcscasecmp 
+*/
+
+#include <wchar.h>
+#include <wctype.h>
+
+int
+_DEFUN (wcscasecmp, (s1, s2),
+	_CONST wchar_t *s1 _AND
+	_CONST wchar_t *s2)
+{
+  while (*s1 != '\0' && towlower(*s1) == towlower(*s2))
+    {
+      s1++;
+      s2++;
+    }
+
+  return towlower(*s1) - towlower(*s2);
+}