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/*

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);

}