NetBSD-5.0.2/lib/libc/stdlib/strsuftoll.c
/* $NetBSD: strsuftoll.c,v 1.8 2008/04/28 20:23:00 martin Exp $ */
/*-
* Copyright (c) 2001-2002,2004 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Luke Mewburn.
*
* 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.
*/
/*-
* Copyright (c) 1991, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Keith Muller of the University of California, San Diego and Lance
* Visser of Convex Computer Corporation.
*
* 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.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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: strsuftoll.c,v 1.8 2008/04/28 20:23:00 martin Exp $");
#endif /* LIBC_SCCS and not lint */
#ifdef _LIBC
#include "namespace.h"
#endif
#if !HAVE_STRSUFTOLL
#include <sys/types.h>
#include <sys/time.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef _LIBC
# ifdef __weak_alias
__weak_alias(strsuftoll, _strsuftoll)
__weak_alias(strsuftollx, _strsuftollx)
# endif
#endif /* LIBC */
/*
* Convert an expression of the following forms to a (u)int64_t.
* 1) A positive decimal number.
* 2) A positive decimal number followed by a b (mult by 512).
* 3) A positive decimal number followed by a k (mult by 1024).
* 4) A positive decimal number followed by a m (mult by 1048576).
* 5) A positive decimal number followed by a g (mult by 1073741824).
* 6) A positive decimal number followed by a t (mult by 1099511627776).
* 7) A positive decimal number followed by a w (mult by sizeof int)
* 8) Two or more positive decimal numbers (with/without k,b or w).
* separated by x (also * for backwards compatibility), specifying
* the product of the indicated values.
* Returns the result upon successful conversion, or exits with an
* appropriate error.
*
*/
/* LONGLONG */
long long
strsuftoll(const char *desc, const char *val,
long long min, long long max)
{
long long result;
char errbuf[100];
result = strsuftollx(desc, val, min, max, errbuf, sizeof(errbuf));
if (*errbuf != '\0')
errx(1, "%s", errbuf);
return (result);
}
/*
* As strsuftoll(), but returns the error message into the provided buffer
* rather than exiting with it.
*/
/* LONGLONG */
long long
strsuftollx(const char *desc, const char *val,
long long min, long long max, char *ebuf, size_t ebuflen)
{
long long num, t;
char *expr;
_DIAGASSERT(desc != NULL);
_DIAGASSERT(val != NULL);
_DIAGASSERT(ebuf != NULL);
errno = 0;
ebuf[0] = '\0';
while (isspace((unsigned char)*val)) /* Skip leading space */
val++;
num = strtoll(val, &expr, 10);
if (errno == ERANGE)
goto erange; /* Overflow */
if (expr == val) /* No digits */
goto badnum;
switch (*expr) {
case 'b':
t = num;
num *= 512; /* 1 block */
if (t > num)
goto erange;
++expr;
break;
case 'k':
t = num;
num *= 1024; /* 1 kibibyte */
if (t > num)
goto erange;
++expr;
break;
case 'm':
t = num;
num *= 1048576; /* 1 mebibyte */
if (t > num)
goto erange;
++expr;
break;
case 'g':
t = num;
num *= 1073741824; /* 1 gibibyte */
if (t > num)
goto erange;
++expr;
break;
case 't':
t = num;
num *= 1099511627776LL; /* 1 tebibyte */
if (t > num)
goto erange;
++expr;
break;
case 'w':
t = num;
num *= sizeof(int); /* 1 word */
if (t > num)
goto erange;
++expr;
break;
}
switch (*expr) {
case '\0':
break;
case '*': /* Backward compatible */
case 'x':
t = num;
num *= strsuftollx(desc, expr + 1, min, max, ebuf, ebuflen);
if (*ebuf != '\0')
return (0);
if (t > num) {
erange:
snprintf(ebuf, ebuflen,
"%s: %s", desc, strerror(ERANGE));
return (0);
}
break;
default:
badnum: snprintf(ebuf, ebuflen,
"%s `%s': illegal number", desc, val);
return (0);
}
if (num < min) {
/* LONGLONG */
snprintf(ebuf, ebuflen, "%s %lld is less than %lld.",
desc, (long long)num, (long long)min);
return (0);
}
if (num > max) {
/* LONGLONG */
snprintf(ebuf, ebuflen,
"%s %lld is greater than %lld.",
desc, (long long)num, (long long)max);
return (0);
}
*ebuf = '\0';
return (num);
}
#endif /* !HAVE_STRSUFTOLL */