reactos/lib/sdk/crt/mbstring/mbsicmp.c

/*
 * COPYRIGHT:   See COPYING in the top level directory
 * PROJECT:     ReactOS system libraries
 * FILE:        lib/msvcrt/mbstring/mbsicmp.c
 * PURPOSE:     Duplicates a multi byte string
 * PROGRAMER:   Ariadne
 * UPDATE HISTORY:
 *              12/04/99: Created
 */
#include <precomp.h>
#include <mbstring.h>

/*
 * @implemented
 */
int _mbsicmp(const unsigned char *str1, const unsigned char *str2)
{
	unsigned char *s1 = (unsigned char *)str1;
	unsigned char *s2 = (unsigned char *)str2;

	unsigned short *short_s1, *short_s2;

	int l1, l2;

	do {

		if (*s1 == 0)
			break;

		l1 = _ismbblead(*s1);
		l2 = _ismbblead(*s2);
		if ( !l1 &&  !l2  ) {

			if (toupper(*s1) != toupper(*s2))
				return toupper(*s1) - toupper(*s2);
			else {
				s1 += 1;
				s2 += 1;
			}
		}
		else if ( l1 && l2 ){
			short_s1 = (unsigned short *)s1;
			short_s2 = (unsigned short *)s2;
			if ( _mbctoupper(*short_s1) != _mbctoupper(*short_s2 ))
				return _mbctoupper(*short_s1) - _mbctoupper(*short_s2);
			else {
				s1 += 2;
				s2 += 2;
			}
		}
		else
			return *s1 - *s2;
	} while (*s1 != 0);
	return 0;

  while (toupper(*s1) == toupper(*s2))
  {
    if (*s1 == 0)
      return 0;
    s1++;
    s2++;
  }
  return toupper(*(unsigned const char *)s1) - toupper(*(unsigned const char *)(s2));
}