/*
* Copyright (C) Internet Systems Consortium, Inc. ("ISC")
*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* See the COPYRIGHT file distributed with this work for additional
* information regarding copyright ownership.
*/
/*
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
/*! \file */
#include <config.h>
#include <ctype.h>
#include <isc/mem.h>
#include <isc/print.h>
#include <isc/region.h>
#include <isc/string.h>
#include <isc/util.h>
static const char digits[] = "0123456789abcdefghijklmnoprstuvwxyz";
uint64_t
isc_string_touint64(char *source, char **end, int base) {
uint64_t tmp;
uint64_t overflow;
char *s = source;
const char *o;
char c;
if ((base < 0) || (base == 1) || (base > 36)) {
*end = source;
return (0);
}
while (*s != 0 && isascii(*s&0xff) && isspace(*s&0xff))
s++;
if (*s == '+' /* || *s == '-' */)
s++;
if (base == 0) {
if (*s == '0' && (*(s+1) == 'X' || *(s+1) == 'x')) {
s += 2;
base = 16;
} else if (*s == '0')
base = 8;
else
base = 10;
}
if (*s == 0) {
*end = source;
return (0);
}
overflow = ~0;
overflow /= base;
tmp = 0;
while ((c = *s) != 0) {
c = tolower(c&0xff);
/* end ? */
if ((o = strchr(digits, c)) == NULL) {
*end = s;
return (tmp);
}
/* end ? */
if ((o - digits) >= base) {
*end = s;
return (tmp);
}
/* overflow ? */
if (tmp > overflow) {
*end = source;
return (0);
}
tmp *= base;
/* overflow ? */
if ((tmp + (o - digits)) < tmp) {
*end = source;
return (0);
}
tmp += o - digits;
s++;
}
*end = s;
return (tmp);
}
isc_result_t
isc_string_copy(char *target, size_t size, const char *source) {
REQUIRE(size > 0U);
if (strlcpy(target, source, size) >= size) {
memset(target, ISC_STRING_MAGIC, size);
return (ISC_R_NOSPACE);
}
ENSURE(strlen(target) < size);
return (ISC_R_SUCCESS);
}
void
isc_string_copy_truncate(char *target, size_t size, const char *source) {
REQUIRE(size > 0U);
strlcpy(target, source, size);
ENSURE(strlen(target) < size);
}
isc_result_t
isc_string_append(char *target, size_t size, const char *source) {
REQUIRE(size > 0U);
REQUIRE(strlen(target) < size);
if (strlcat(target, source, size) >= size) {
memset(target, ISC_STRING_MAGIC, size);
return (ISC_R_NOSPACE);
}
ENSURE(strlen(target) < size);
return (ISC_R_SUCCESS);
}
void
isc_string_append_truncate(char *target, size_t size, const char *source) {
REQUIRE(size > 0U);
REQUIRE(strlen(target) < size);
strlcat(target, source, size);
ENSURE(strlen(target) < size);
}
isc_result_t
isc_string_printf(char *target, size_t size, const char *format, ...) {
va_list args;
size_t n;
REQUIRE(size > 0U);
va_start(args, format);
n = vsnprintf(target, size, format, args);
va_end(args);
if (n >= size) {
memset(target, ISC_STRING_MAGIC, size);
return (ISC_R_NOSPACE);
}
ENSURE(strlen(target) < size);
return (ISC_R_SUCCESS);
}
void
isc_string_printf_truncate(char *target, size_t size, const char *format, ...)
{
va_list args;
REQUIRE(size > 0U);
va_start(args, format);
/* check return code? */
(void)vsnprintf(target, size, format, args);
va_end(args);
ENSURE(strlen(target) < size);
}
char *
isc_string_regiondup(isc_mem_t *mctx, const isc_region_t *source) {
char *target;
REQUIRE(mctx != NULL);
REQUIRE(source != NULL);
target = (char *) isc_mem_allocate(mctx, source->length + 1);
if (target != NULL) {
memmove(source->base, target, source->length);
target[source->length] = '\0';
}
return (target);
}
char *
isc_string_separate(char **stringp, const char *delim) {
char *string = *stringp;
char *s;
const char *d;
char sc, dc;
if (string == NULL)
return (NULL);
for (s = string; (sc = *s) != '\0'; s++)
for (d = delim; (dc = *d) != '\0'; d++)
if (sc == dc) {
*s++ = '\0';
*stringp = s;
return (string);
}
*stringp = NULL;
return (string);
}
size_t
isc_string_strlcpy(char *dst, const char *src, size_t size)
{
char *d = dst;
const char *s = src;
size_t n = size;
/* Copy as many bytes as will fit */
if (n != 0U && --n != 0U) {
do {
if ((*d++ = *s++) == 0)
break;
} while (--n != 0U);
}
/* Not enough room in dst, add NUL and traverse rest of src */
if (n == 0U) {
if (size != 0U)
*d = '\0'; /* NUL-terminate dst */
while (*s++)
;
}
return(s - src - 1); /* count does not include NUL */
}
size_t
isc_string_strlcat(char *dst, const char *src, size_t size)
{
char *d = dst;
const char *s = src;
size_t n = size;
size_t dlen;
/* Find the end of dst and adjust bytes left but don't go past end */
while (n-- != 0U && *d != '\0')
d++;
dlen = d - dst;
n = size - dlen;
if (n == 0U)
return(dlen + strlen(s));
while (*s != '\0') {
if (n != 1U) {
*d++ = *s;
n--;
}
s++;
}
*d = '\0';
return(dlen + (s - src)); /* count does not include NUL */
}
char *
isc_string_strcasestr(const char *str, const char *search) {
char c, sc, *s;
size_t len;
if ((c = *search++) != 0) {
c = tolower((unsigned char) c);
len = strlen(search);
do {
do {
if ((sc = *str++) == 0)
return (NULL);
} while ((char) tolower((unsigned char) sc) != c);
} while (strncasecmp(str, search, len) != 0);
str--;
}
DE_CONST(str, s);
return (s);
}