/* lwrcmpz.c */

/* Copyright 1997 by Eberhard Mattes <mattes@azu.informatik.uni-stuttgart.de>
   Donated to the public domain.  No warranty.

   1997-09-09 Initial version */

#include <stdlib.h>
#include "libemfw.h"

/* Compare the null-terminated strings pointed to by S1 and S2,
   ignoring case.  Return a positive value (S1 compares greater than
   S2), zero (S1 compares equal to S2), or a negative value (S1
   compares less than S2).  Characters are converted to lower case for
   comparison. */

int lower_cmpz (const char *s1, const char *s2)
{
  int d;

  DEBUG_ASSERT (s1 != NULL);
  DEBUG_ASSERT (s2 != NULL);
  DEBUG_ASSERT (lower_table[0] == 0);
  for (;;)
    {
      d = lower_table[(unsigned char)*s1] - lower_table[(unsigned char)*s2];
      if (d != 0 || *s1 == 0 || *s2 == 0)
	return d;
      ++s1; ++s2;
    }
}