b6cbf7203b
This patch imports the unmodified current version of NetBSD libc. The NetBSD includes are in /nbsd_include, while the libc code itself is split between lib/nbsd_libc and common/lib/libc.
116 lines
3.3 KiB
C
116 lines
3.3 KiB
C
/* $NetBSD: dehumanize_number.c,v 1.3 2008/04/28 20:22:59 martin Exp $ */
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/*
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* Copyright (c) 2005, 2006 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Julio M. Merino Vidal, developed as part of Google's Summer of Code
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* 2005 program.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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__RCSID("$NetBSD: dehumanize_number.c,v 1.3 2008/04/28 20:22:59 martin Exp $");
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <inttypes.h>
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#include <ctype.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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#include <limits.h>
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/*
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* Converts the number given in 'str', which may be given in a humanized
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* form (as described in humanize_number(3), but with some limitations),
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* to an int64_t without units.
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* In case of success, 0 is returned and *size holds the value.
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* Otherwise, -1 is returned and *size is untouched.
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*
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* TODO: Internationalization, SI units.
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*/
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int
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dehumanize_number(const char *str, int64_t *size)
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{
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char *ep, unit;
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const char *delimit;
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long multiplier;
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long long tmp, tmp2;
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size_t len;
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len = strlen(str);
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if (len == 0) {
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errno = EINVAL;
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return -1;
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}
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multiplier = 1;
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unit = str[len - 1];
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if (isalpha((unsigned char)unit)) {
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switch (tolower((unsigned char)unit)) {
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case 'b':
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multiplier = 1;
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break;
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case 'k':
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multiplier = 1024;
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break;
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case 'm':
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multiplier = 1024 * 1024;
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break;
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case 'g':
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multiplier = 1024 * 1024 * 1024;
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break;
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default:
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errno = EINVAL;
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return -1; /* Invalid suffix. */
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}
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delimit = &str[len - 1];
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} else
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delimit = NULL;
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errno = 0;
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tmp = strtoll(str, &ep, 10);
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if (str[0] == '\0' || (ep != delimit && *ep != '\0'))
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return -1; /* Not a number. */
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else if (errno == ERANGE && (tmp == LLONG_MAX || tmp == LLONG_MIN))
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return -1; /* Out of range. */
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tmp2 = tmp * multiplier;
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tmp2 = tmp2 / multiplier;
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if (tmp != tmp2) {
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errno = ERANGE;
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return -1; /* Out of range. */
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}
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*size = tmp * multiplier;
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return 0;
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}
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