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/* Copyright (C) 2018 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <assert.h>
#include <errno.h>
#include <inttypes.h>
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include "libknot/errcode.h"
#include "contrib/ctype.h"
inline static int intmax_from_str(const char *src, intmax_t *dst,
intmax_t min, intmax_t max)
{
if (!is_digit(*src) && *src != '-' && *src != '+') {
return KNOT_EINVAL;
}
errno = 0;
char *end = NULL;
intmax_t result = strtoimax(src, &end, 10);
if (errno == ERANGE) {
return KNOT_ERANGE;
}
if (src == end || *end != '\0') {
return KNOT_EINVAL;
}
if (result < min || result > max) {
return KNOT_ERANGE;
}
*dst = result;
return KNOT_EOK;
}
inline static int uintmax_from_str(const char *src, uintmax_t *dst,
uintmax_t min, uintmax_t max)
{
if (!is_digit(*src) && *src != '+') {
return KNOT_EINVAL;
}
errno = 0;
char *end = NULL;
uintmax_t result = strtoumax(src, &end, 10);
if (errno == ERANGE) {
return KNOT_ERANGE;
}
if (src == end || *end != '\0') {
return KNOT_EINVAL;
}
if (result < min || result > max) {
return KNOT_ERANGE;
}
*dst = result;
return KNOT_EOK;
}
#define CONVERT(prefix, type, min, max, src, dst) \
{ \
assert(src && dst); \
prefix##max_t value; \
int result = prefix##max_from_str(src, &value, min, max); \
if (result != KNOT_EOK) { \
return result; \
} \
*dst = (type)value; \
return KNOT_EOK; \
}
inline static int str_to_int(const char *src, int *dst, int min, int max)
{
CONVERT(int, int, min, max, src, dst);
}
inline static int str_to_u8(const char *src, uint8_t *dst)
{
CONVERT(uint, uint8_t, 0, UINT8_MAX, src, dst);
}
inline static int str_to_u16(const char *src, uint16_t *dst)
{
CONVERT(uint, uint16_t, 0, UINT16_MAX, src, dst);
}
inline static int str_to_u32(const char *src, uint32_t *dst)
{
CONVERT(uint, uint32_t, 0, UINT32_MAX, src, dst);
}
inline static int str_to_size(const char *src, size_t *dst, size_t min, size_t max)
{
CONVERT(uint, size_t, min, max, src, dst);
}
#undef CONVERT
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