* Utilities to convert strings to integers
*
* Copyright 2016, Dario Lombardo
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "config.h"
#include <errno.h>
#include <glib.h>
#include "strtoi.h"
#include <wsutil/ws_assert.h>
bool ws_strtoi64(const char* str, const char** endptr, int64_t* cint)
{
char* end;
int64_t val;
ws_assert(cint);
if (!str) {
errno = EINVAL;
return false;
}
errno = 0;
val = g_ascii_strtoll(str, &end, 10);
if ((val == 0 && end == str) || (endptr == NULL && *end != '\0')) {
*cint = 0;
if (endptr != NULL)
*endptr = end;
errno = EINVAL;
return false;
}
if ((val == INT64_MAX || val == INT64_MIN) && errno == ERANGE) {
* Return the value, so our caller knows whether to
* report the value as "too small" or "too large".
*/
*cint = val;
if (endptr != NULL)
*endptr = end;
return false;
}
if (endptr != NULL)
*endptr = end;
*cint = val;
return true;
}
#define DEFINE_WS_STRTOI_BITS(bits) \
bool ws_strtoi##bits(const char* str, const char** endptr, int##bits##_t* cint) \
{ \
int64_t val = 0; \
if (!ws_strtoi64(str, endptr, &val)) { \
* For ERANGE, return either INT##bits##_MIN or \
* INT##bits##_MAX so our caller knows whether \
* to report the value as "too small" or "too \
* large". \
* \
* For other errors, return 0, for parallelism \
* with ws_strtoi64(). \
*/ \
if (errno == ERANGE) { \
if (val < 0) \
*cint = INT##bits##_MIN; \
else \
*cint = INT##bits##_MAX; \
} else \
*cint = 0; \
return false; \
} \
if (val < INT##bits##_MIN) { \
* Return INT##bits##_MIN so our caller knows whether to \
* report the value as "too small" or "too large". \
*/ \
*cint = INT##bits##_MIN; \
errno = ERANGE; \
return false; \
} \
if (val > INT##bits##_MAX) { \
* Return INT##bits##_MAX so our caller knows whether to \
* report the value as "too small" or "too large". \
*/ \
*cint = INT##bits##_MAX; \
errno = ERANGE; \
return false; \
} \
*cint = (int##bits##_t)val; \
return true; \
}
DEFINE_WS_STRTOI_BITS(32)
DEFINE_WS_STRTOI_BITS(16)
DEFINE_WS_STRTOI_BITS(8)
bool ws_strtoi(const char* str, const char** endptr, int* cint)
{
int64_t val = 0;
if (!ws_strtoi64(str, endptr, &val)) {
* For ERANGE, return either INT_MIN or
* INT_MAX so our caller knows whether
* to report the value as "too small" or "too
* large".
*
* For other errors, return 0, for parallelism
* with ws_strtoi64().
*/
if (errno == ERANGE) {
if (val < 0)
*cint = INT_MIN;
else
*cint = INT_MAX;
} else
*cint = 0;
return false;
}
if (val < INT_MIN) {
* Return INT_MIN so our caller knows whether to
* report the value as "too small" or "too large".
*/
*cint = INT_MIN;
errno = ERANGE;
return false;
}
if (val > INT_MAX) {
* Return INT_MAX so our caller knows whether to
* report the value as "too small" or "too large".
*/
*cint = INT_MAX;
errno = ERANGE;
return false;
}
*cint = (int)val;
return true;
}
bool ws_basestrtou64(const char* str, const char** endptr, uint64_t* cint, int base)
{
char* end;
uint64_t val;
ws_assert(cint);
if (!str) {
errno = EINVAL;
return false;
}
if (str[0] == '-' || str[0] == '+') {
* Unsigned numbers don't have a sign.
*/
*cint = 0;
if (endptr != NULL)
*endptr = str;
errno = EINVAL;
return false;
}
errno = 0;
val = g_ascii_strtoull(str, &end, base);
if ((val == 0 && end == str) || (endptr == NULL && *end != '\0')) {
*cint = 0;
if (endptr != NULL)
*endptr = end;
errno = EINVAL;
return false;
}
if (val == UINT64_MAX && errno == ERANGE) {
* Return the value, because ws_strtoi64() does.
*/
*cint = val;
if (endptr != NULL)
*endptr = end;
return false;
}
if (endptr != NULL)
*endptr = end;
*cint = val;
return true;
}
bool ws_strtou64(const char* str, const char** endptr, uint64_t* cint)
{
return ws_basestrtou64(str, endptr, cint, 10);
}
bool ws_hexstrtou64(const char* str, const char** endptr, uint64_t* cint)
{
return ws_basestrtou64(str, endptr, cint, 16);
}
#define DEFINE_WS_STRTOU_BITS(bits) \
bool ws_basestrtou##bits(const char* str, const char** endptr, uint##bits##_t* cint, int base) \
{ \
uint64_t val; \
if (!ws_basestrtou64(str, endptr, &val, base)) { \
* For ERANGE, return UINT##bits##_MAX for parallelism \
* with ws_strtoi##bits(). \
* \
* For other errors, return 0, for parallelism \
* with ws_basestrtou64(). \
*/ \
if (errno == ERANGE) \
*cint = UINT##bits##_MAX; \
else \
*cint = 0; \
return false; \
} \
if (val > UINT##bits##_MAX) { \
* Return UINT##bits##_MAX for parallelism with \
* ws_strtoi##bits(). \
*/ \
*cint = UINT##bits##_MAX; \
errno = ERANGE; \
return false; \
} \
*cint = (uint##bits##_t)val; \
return true; \
} \
\
bool ws_strtou##bits(const char* str, const char** endptr, uint##bits##_t* cint) \
{ \
return ws_basestrtou##bits(str, endptr, cint, 10); \
} \
\
bool ws_hexstrtou##bits(const char* str, const char** endptr, uint##bits##_t* cint) \
{ \
return ws_basestrtou##bits(str, endptr, cint, 16); \
}
DEFINE_WS_STRTOU_BITS(32)
DEFINE_WS_STRTOU_BITS(16)
DEFINE_WS_STRTOU_BITS(8)
bool ws_basestrtou(const char* str, const char** endptr, unsigned* cint, int base)
{
uint64_t val;
if (!ws_basestrtou64(str, endptr, &val, base)) {
* For ERANGE, return UINT_MAX for parallelism
* with ws_strtoi().
*
* For other errors, return 0, for parallelism
* with ws_basestrtou64().
*/
if (errno == ERANGE)
*cint = UINT_MAX;
else
*cint = 0;
return false;
}
if (val > UINT_MAX) {
* Return UINT_MAX for parallelism with
* ws_strtoi().
*/
*cint = UINT_MAX;
errno = ERANGE;
return false;
}
*cint = (unsigned)val;
return true;
}
bool ws_strtou(const char* str, const char** endptr, unsigned* cint)
{
return ws_basestrtou(str, endptr, cint, 10);
}
\
bool ws_hexstrtou(const char* str, const char** endptr, unsigned* cint)
{
return ws_basestrtou(str, endptr, cint, 16);
}
* Editor modelines - https://www.wireshark.org/tools/modelines.html
*
* Local variables:
* c-basic-offset: 4
* tab-width: 8
* indent-tabs-mode: t
* End:
*
* vi: set shiftwidth=4 tabstop=8 noexpandtab:
* :indentSize=4:tabSize=8:noTabs=false:
*/