/* ====================================================================
 * Copyright (c) 1999-2004 Carnegie Mellon University.  All rights
 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * This work was supported in part by funding from the Defense Advanced 
 * Research Projects Agency and the National Science Foundation of the 
 * United States of America, and the CMU Sphinx Speech Consortium.
 *
 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
 * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ====================================================================
 *
 */
/*
 * case.c -- Upper/lower case conversion routines
 *
 * **********************************************
 * CMU ARPA Speech Project
 *
 * Copyright (c) 1999 Carnegie Mellon University.
 * ALL RIGHTS RESERVED.
 * **********************************************
 * 
 * HISTORY
 * 
 * 18-Jun-97	M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon
 * 		Added strcmp_nocase.  Moved UPPER_CASE and LOWER_CASE definitions to .h.
 * 
 * 16-Feb-97	M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon
 * 		Created.
 */


#include "case.h"
#include <stdlib.h>
#include <assert.h>
#include "err.h"


void lcase(register char *cp)
{
   if ( cp ){
     while( *cp ){
       *cp = LOWER_CASE( *cp ) ;
       cp++ ;
     }
   }
}

void ucase(register char *cp)
{
   if ( cp ){
     while ( *cp ){
       *cp = UPPER_CASE( *cp ) ;
       cp++ ;
     }
   }
}

int32 strcmp_nocase (const char *str1, const char *str2)
{
    char c1, c2;

    if(str1 == str2)
      return 0;
    if(str1 && str2){
      for (;;) {
	c1 = *(str1++);
	c1 = UPPER_CASE(c1);
	c2 = *(str2++);
	c2 = UPPER_CASE(c2);
	if (c1 != c2)
	  return (c1-c2);
	if (c1 == '\0')
	  return 0;
      }
    }
    else
      return (str1 == NULL) ? -1 : 1;

   return 0;
}
