lib/isc/parseint.c

	parseint.c revision dafcb997e390efa4423883dafd100c975c4095d6
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews/*
dafcb997e390efa4423883dafd100c975c4095d6Mark Andrews * Copyright (C) 2004  Internet Systems Consortium, Inc. ("ISC")
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Copyright (C) 2001-2003  Internet Software Consortium.
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews *
0c27b3fe77ac1d5094ba3521e8142d9e7973133fMark Andrews * Permission to use, copy, modify, and distribute this software for any
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * purpose with or without fee is hereby granted, provided that the above
70e5a7403f0e0a3bd292b8287c5fed5772c15270Automatic Updater * copyright notice and this permission notice appear in all copies.
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews *
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * AND FITNESS.  IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
362a27e81e6de298b6ff31457ad22380a6d825c2Mark Andrews * OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

/* $Id: parseint.c,v 1.4 2004/03/05 05:10:48 marka Exp $ */

#include <config.h>

#include <ctype.h>
#include <errno.h>
#include <limits.h>

#include <isc/parseint.h>
#include <isc/result.h>
#include <isc/stdlib.h>

isc_result_t
isc_parse_uint32(isc_uint32_t *uip, const char *string, int base) {
    unsigned long n;
    char *e;
    if (! isalnum((unsigned char)(string[0])))
        return (ISC_R_BADNUMBER);
    errno = 0;
    n = strtoul(string, &e, base);
    if (*e != '\0')
        return (ISC_R_BADNUMBER);
    if (n == ULONG_MAX && errno == ERANGE)
        return (ISC_R_RANGE);
    *uip = n;
    return (ISC_R_SUCCESS);
}

isc_result_t
isc_parse_uint16(isc_uint16_t *uip, const char *string, int base) {
    isc_uint32_t val;
    isc_result_t result;
    result = isc_parse_uint32(&val, string, base);
    if (result != ISC_R_SUCCESS)
        return (result);
    if (val > 0xFFFF)
        return (ISC_R_RANGE);
    *uip = (isc_uint16_t) val;
    return (ISC_R_SUCCESS);
}

isc_result_t
isc_parse_uint8(isc_uint8_t *uip, const char *string, int base) {
    isc_uint32_t val;
    isc_result_t result;
    result = isc_parse_uint32(&val, string, base);
    if (result != ISC_R_SUCCESS)
        return (result);
    if (val > 0xFF)
        return (ISC_R_RANGE);
    *uip = (isc_uint8_t) val;
    return (ISC_R_SUCCESS);
}