mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-04 22:21:23 +00:00
78be959e38
Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
225 lines
4.1 KiB
C
225 lines
4.1 KiB
C
/*
|
|
* Convert integer string representation to an integer.
|
|
* If an integer doesn't fit into specified type, -E is returned.
|
|
*
|
|
* Integer starts with optional sign.
|
|
* kstrtou*() functions do not accept sign "-".
|
|
*
|
|
* Radix 0 means autodetection: leading "0x" implies radix 16,
|
|
* leading "0" implies radix 8, otherwise radix is 10.
|
|
* Autodetection hints work after optional sign, but not before.
|
|
*
|
|
* If -E is returned, result is not touched.
|
|
*/
|
|
#include <linux/ctype.h>
|
|
#include <linux/errno.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/math64.h>
|
|
#include <linux/module.h>
|
|
#include <linux/types.h>
|
|
|
|
static inline char _tolower(const char c)
|
|
{
|
|
return c | 0x20;
|
|
}
|
|
|
|
static int _kstrtoull(const char *s, unsigned int base, unsigned long long *res)
|
|
{
|
|
unsigned long long acc;
|
|
int ok;
|
|
|
|
if (base == 0) {
|
|
if (s[0] == '0') {
|
|
if (_tolower(s[1]) == 'x' && isxdigit(s[2]))
|
|
base = 16;
|
|
else
|
|
base = 8;
|
|
} else
|
|
base = 10;
|
|
}
|
|
if (base == 16 && s[0] == '0' && _tolower(s[1]) == 'x')
|
|
s += 2;
|
|
|
|
acc = 0;
|
|
ok = 0;
|
|
while (*s) {
|
|
unsigned int val;
|
|
|
|
if ('0' <= *s && *s <= '9')
|
|
val = *s - '0';
|
|
else if ('a' <= _tolower(*s) && _tolower(*s) <= 'f')
|
|
val = _tolower(*s) - 'a' + 10;
|
|
else if (*s == '\n' && *(s + 1) == '\0')
|
|
break;
|
|
else
|
|
return -EINVAL;
|
|
|
|
if (val >= base)
|
|
return -EINVAL;
|
|
if (acc > div_u64(ULLONG_MAX - val, base))
|
|
return -ERANGE;
|
|
acc = acc * base + val;
|
|
ok = 1;
|
|
|
|
s++;
|
|
}
|
|
if (!ok)
|
|
return -EINVAL;
|
|
*res = acc;
|
|
return 0;
|
|
}
|
|
|
|
int kstrtoull(const char *s, unsigned int base, unsigned long long *res)
|
|
{
|
|
if (s[0] == '+')
|
|
s++;
|
|
return _kstrtoull(s, base, res);
|
|
}
|
|
EXPORT_SYMBOL(kstrtoull);
|
|
|
|
int kstrtoll(const char *s, unsigned int base, long long *res)
|
|
{
|
|
unsigned long long tmp;
|
|
int rv;
|
|
|
|
if (s[0] == '-') {
|
|
rv = _kstrtoull(s + 1, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if ((long long)(-tmp) >= 0)
|
|
return -ERANGE;
|
|
*res = -tmp;
|
|
} else {
|
|
rv = kstrtoull(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if ((long long)tmp < 0)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
}
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtoll);
|
|
|
|
/* Internal, do not use. */
|
|
int _kstrtoul(const char *s, unsigned int base, unsigned long *res)
|
|
{
|
|
unsigned long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoull(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (unsigned long long)(unsigned long)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(_kstrtoul);
|
|
|
|
/* Internal, do not use. */
|
|
int _kstrtol(const char *s, unsigned int base, long *res)
|
|
{
|
|
long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoll(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (long long)(long)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(_kstrtol);
|
|
|
|
int kstrtouint(const char *s, unsigned int base, unsigned int *res)
|
|
{
|
|
unsigned long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoull(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (unsigned long long)(unsigned int)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtouint);
|
|
|
|
int kstrtoint(const char *s, unsigned int base, int *res)
|
|
{
|
|
long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoll(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (long long)(int)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtoint);
|
|
|
|
int kstrtou16(const char *s, unsigned int base, u16 *res)
|
|
{
|
|
unsigned long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoull(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (unsigned long long)(u16)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtou16);
|
|
|
|
int kstrtos16(const char *s, unsigned int base, s16 *res)
|
|
{
|
|
long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoll(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (long long)(s16)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtos16);
|
|
|
|
int kstrtou8(const char *s, unsigned int base, u8 *res)
|
|
{
|
|
unsigned long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoull(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (unsigned long long)(u8)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtou8);
|
|
|
|
int kstrtos8(const char *s, unsigned int base, s8 *res)
|
|
{
|
|
long long tmp;
|
|
int rv;
|
|
|
|
rv = kstrtoll(s, base, &tmp);
|
|
if (rv < 0)
|
|
return rv;
|
|
if (tmp != (long long)(s8)tmp)
|
|
return -ERANGE;
|
|
*res = tmp;
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL(kstrtos8);
|