strnicmp.c

wm PNE 3.3 source code, running at more than vxworks6.x version.

/* $Header: /usr/cvsroot/target/src/wrn/wm/common/lib/strnicmp.c,v 1.3 2003/01/16 18:18:57 josh Exp $ */

/*
 * Copyright (C) 1999-2005 Wind River Systems, Inc.
 * All rights reserved.  Provided under license only.
 * Distribution or other use of this software is only
 * permitted pursuant to the terms of a license agreement
 * from Wind River Systems (and is otherwise prohibited).
 * Refer to that license agreement for terms of use.
 */


/****************************************************************************
 *  Copyright 1993-1997 Epilogue Technology Corporation.
 *  Copyright 1998 Integrated Systems, Inc.
 *  All rights reserved.
 ****************************************************************************/

/*
 * $Log: strnicmp.c,v $
 * Revision 1.3  2003/01/16 18:18:57  josh
 * directory structure shifting
 *
 * Revision 1.2  2001/11/06 22:15:55  tneale
 * Fixed for newest file layout
 *
 * Revision 1.1.1.1  2001/11/05 17:48:40  tneale
 * Tornado shuffle
 *
 * Revision 1.6  2001/05/24 20:32:30  paul
 * CAD-UL compiler is picky.
 *
 * Revision 1.5  2001/01/19 22:21:32  paul
 * Update copyright.
 *
 * Revision 1.4  2000/03/17 00:16:57  meister
 * Update copyright message
 *
 * Revision 1.3  1999/04/09 20:33:48  wes
 * re-constify.  let's see what, if anything, blows up
 *
 * Revision 1.2  1998/06/17 18:25:54  meister
 * This function only returned 0 or -1, now fixed to return 0, 1, or -1
 * as appropriate.
 *
 * Revision 1.1  1998/06/03 20:12:51  sar
 * Added some common string functions.  The user can choose to install
 * these if his library doesn't include them or they are broken.
 *
 */

/* [clearcase]
modification history
-------------------
01b,20apr05,job  update copyright notices
01a,11dec03,job  fix copyright statements
*/


#include <wrn/wm/common/install.h>
#include <wrn/wm/common/stdf.h>

#include <ctype.h>
#include <string.h>

#include <errno.h>

/* PORTABLE 'Standard' C FUNCTIONS - these are written in C because not
 * all systems provide them consistently. Sometimes they're even broken.
 * This code used to be in snark/snmptalk/stdf.c but was moved here to
 * be available to more code. 
 */

int
  etc_strnicmp(register const char   *s,
	       register const char   *t,
	       size_t                len)
{
  int a, b;
  
  while (*s && *t && len) {
    len--;
    a = (int)*s; b = (int)*t;
    if (isupper(a))
      a = tolower(a);
    if (isupper(b))
      b = tolower(b);
    if (a != b)
      return (a > b ? 1 : -1);
    s++;
    t++;
  }
  
  /* if we're here because len is zero, don't do the final compare,
   * which verifies that both strings are null terminated, cause
   * chances are, they're not.
   */
  if (len == 0)
    return 0;
  
  if (*s != *t) {
    return (*s > *t ? 1 : -1);
  }
  else {
    return 0;
  }
}