kc3-lang/libbsd/src/strtonum.c

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• Hash : 461f10ac
  Author :
  Date : 2024-02-17T03:07:58
  

  Sync strtoi()/strtou() implementations from NetBSD These contain the fixes to the error handling logic. In NetBSD the manual page for strtou.3 is generated from the strtoi.3 manual page applying some substitutions, the problem is that the cross-references are then lost. We will still keep them separate. Reported-by: Alejandro Colomar <alx@kernel.org>

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• src/strtonum.c

• /*	$NetBSD: strtonum.c,v 1.7 2024/01/20 16:13:39 christos Exp $	*/
  /*-
   * Copyright (c) 2014 The NetBSD Foundation, Inc.
   * All rights reserved.
   *
   * This code is derived from software contributed to The NetBSD Foundation
   * by Christos Zoulas.
   *
   * 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
   */
  
  #include <sys/cdefs.h>
  
  #include <stdio.h>
  #include <stdlib.h>
  #include <errno.h>
  #include <inttypes.h>
  
  long long
  strtonum(const char *nptr, long long minval, long long maxval,
           const char **errstr)
  {
  	int e;
  	long long rv;
  	const char *resp;
  	char *eptr;
  
  	if (errstr == NULL)
  		errstr = &resp;
  
  	if (minval > maxval)
  		goto out;
  
  	rv = (long long)strtoi(nptr, &eptr, 10, minval, maxval, &e);
  
  	switch (e) {
  	case 0:
  		*errstr = NULL;
  		return rv;
  	case ECANCELED:
  	case ENOTSUP:
  		goto out;
  	case ERANGE:
  		if (*eptr)
  			goto out;
  		*errstr = rv == maxval ? "too large" : "too small";
  		return 0;
  	default:
  		abort();
  	}
  
  out:
  	*errstr = "invalid";
  	return 0;
  }
  

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