/*	$NetBSD: citrus_bcs.c,v 1.5 2005/05/14 17:55:42 tshiozak Exp $	*/

/*-
 * Copyright (c)2003 Citrus Project,
 * 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 SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS 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 THE AUTHOR OR CONTRIBUTORS 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.
 */

#if HAVE_NBTOOL_CONFIG_H
#include "nbtool_config.h"
#endif

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: citrus_bcs.c,v 1.5 2005/05/14 17:55:42 tshiozak Exp $");
#endif /* LIBC_SCCS and not lint */

#include <assert.h>
#include <stdlib.h>

#include "citrus_namespace.h"
#include "citrus_bcs.h"

/*
 * case insensitive comparison between two C strings.
 */
int _citrus_bcs_strcasecmp(const char *__restrict str1,
                           const char *__restrict str2) {
  int c1 = 1, c2 = 1;

  while (c1 && c2 && c1 == c2) {
    c1 = _bcs_toupper(*str1++);
    c2 = _bcs_toupper(*str2++);
  }

  return ((c1 == c2) ? 0 : ((c1 > c2) ? 1 : -1));
}

/*
 * case insensitive comparison between two C strings with limitation of length.
 */
int _citrus_bcs_strncasecmp(const char *__restrict str1,
                            const char *__restrict str2, size_t sz) {
  int c1 = 1, c2 = 1;

  while (c1 && c2 && c1 == c2 && sz != 0) {
    c1 = _bcs_toupper(*str1++);
    c2 = _bcs_toupper(*str2++);
    sz--;
  }

  return ((c1 == c2) ? 0 : ((c1 > c2) ? 1 : -1));
}

/*
 * skip white space characters.
 */
const char *_citrus_bcs_skip_ws(const char *p) {

  while (*p && _bcs_isspace(*p))
    p++;

  return (p);
}

/*
 * skip non white space characters.
 */
const char *_citrus_bcs_skip_nonws(const char *p) {

  while (*p && !_bcs_isspace(*p))
    p++;

  return (p);
}

/*
 * skip white space characters with limitation of length.
 */
const char *_citrus_bcs_skip_ws_len(const char *__restrict p,
                                    size_t *__restrict len) {

  while (*p && *len > 0 && _bcs_isspace(*p)) {
    p++;
    (*len)--;
  }

  return (p);
}

/*
 * skip non white space characters with limitation of length.
 */
const char *_citrus_bcs_skip_nonws_len(const char *__restrict p,
                                       size_t *__restrict len) {

  while (*p && *len > 0 && !_bcs_isspace(*p)) {
    p++;
    (*len)--;
  }

  return (p);
}

/*
 * truncate trailing white space characters.
 */
void _citrus_bcs_trunc_rws_len(const char *__restrict p,
                               size_t *__restrict len) {

  while (*len > 0 && _bcs_isspace(p[*len - 1]))
    (*len)--;
}

/*
 * destructive transliterate to lowercase.
 */
void _citrus_bcs_convert_to_lower(char *s) {
  while (*s) {
    *s = _bcs_tolower(*s);
    s++;
  }
}

/*
 * destructive transliterate to uppercase.
 */
void _citrus_bcs_convert_to_upper(char *s) {
  while (*s) {
    *s = _bcs_toupper(*s);
    s++;
  }
}
