kc3-lang/libbsd/src/strtonum.c

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• Hash : 56ddcfe6
  Author :
  Date : 2009-10-11T21:07:53
  

  Add strtonum function Taken from FreeBSD.

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• src/strtonum.c

• /*-
   * Copyright (c) 2004 Ted Unangst and Todd Miller
   * All rights reserved.
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   *
   *	$OpenBSD: strtonum.c,v 1.6 2004/08/03 19:38:01 millert Exp $
   */
  
  #include <sys/cdefs.h>
  __FBSDID("$FreeBSD$");
  
  #include <errno.h>
  #include <limits.h>
  #include <stdlib.h>
  
  #define INVALID 	1
  #define TOOSMALL 	2
  #define TOOLARGE 	3
  
  long long
  strtonum(const char *numstr, long long minval, long long maxval,
      const char **errstrp)
  {
  	long long ll = 0;
  	char *ep;
  	int error = 0;
  	struct errval {
  		const char *errstr;
  		int err;
  	} ev[4] = {
  		{ NULL,		0 },
  		{ "invalid",	EINVAL },
  		{ "too small",	ERANGE },
  		{ "too large",	ERANGE },
  	};
  
  	ev[0].err = errno;
  	errno = 0;
  	if (minval > maxval)
  		error = INVALID;
  	else {
  		ll = strtoll(numstr, &ep, 10);
  		if (errno == EINVAL || numstr == ep || *ep != '\0')
  			error = INVALID;
  		else if ((ll == LLONG_MIN && errno == ERANGE) || ll < minval)
  			error = TOOSMALL;
  		else if ((ll == LLONG_MAX && errno == ERANGE) || ll > maxval)
  			error = TOOLARGE;
  	}
  	if (errstrp != NULL)
  		*errstrp = ev[error].errstr;
  	errno = ev[error].err;
  	if (error)
  		ll = 0;
  
  	return (ll);
  }
  

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