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https://github.com/isc-projects/bind9.git
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111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
/*
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* Copyright (C) 2004 Internet Systems Consortium, Inc. ("ISC")
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* Copyright (C) 1999-2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND ISC DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: string.c,v 1.6.2.2 2004/09/16 01:00:40 marka Exp $ */
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#include <config.h>
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#include <ctype.h>
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#include <isc/string.h>
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static char digits[] = "0123456789abcdefghijklmnoprstuvwxyz";
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isc_uint64_t
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isc_string_touint64(char *source, char **end, int base) {
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isc_uint64_t tmp;
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isc_uint64_t overflow;
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char *s = source;
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char *o;
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char c;
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if ((base < 0) || (base == 1) || (base > 36)) {
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*end = source;
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return (0);
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}
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while (*s != 0 && isascii(*s&0xff) && isspace(*s&0xff))
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s++;
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if (*s == '+' /* || *s == '-' */)
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s++;
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if (base == 0) {
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if (*s == '0' && (*(s+1) == 'X' || *(s+1) == 'x')) {
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s += 2;
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base = 16;
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} else if (*s == '0')
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base = 8;
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else
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base = 10;
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}
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if (*s == 0) {
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*end = source;
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return (0);
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}
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overflow = ~0;
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overflow /= base;
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tmp = 0;
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while ((c = *s) != 0) {
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c = tolower(c&0xff);
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/* end ? */
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if ((o = strchr(digits, c)) == NULL) {
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*end = s;
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return (tmp);
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}
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/* end ? */
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if ((o - digits) >= base) {
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*end = s;
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return (tmp);
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}
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/* overflow ? */
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if (tmp > overflow) {
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*end = source;
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return (0);
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}
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tmp *= base;
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/* overflow ? */
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if ((tmp + (o - digits)) < tmp) {
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*end = source;
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return (0);
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}
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tmp += o - digits;
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s++;
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}
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*end = s;
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return (tmp);
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}
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char *
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isc_string_separate(char **stringp, const char *delim) {
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char *string = *stringp;
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char *s;
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const char *d;
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char sc, dc;
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if (string == NULL)
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return (NULL);
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for (s = string; (sc = *s) != '\0'; s++)
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for (d = delim; (dc = *d) != '\0'; d++)
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if (sc == dc) {
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*s++ = '\0';
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*stringp = s;
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return (string);
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}
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*stringp = NULL;
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return (string);
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}
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