/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_KSTRTOX_H
#define _LINUX_KSTRTOX_H
#include <linux/compiler.h>
#include <linux/types.h>
/* Internal, do not use. */
int __must_check _kstrtoul(const char *s, unsigned int base, unsigned long *res);
int __must_check _kstrtol(const char *s, unsigned int base, long *res);
int __must_check kstrtoull(const char *s, unsigned int base, unsigned long long *res);
int __must_check kstrtoll(const char *s, unsigned int base, long long *res);
/**
* kstrtoul - convert a string to an unsigned long
* @ s : The start of the string . The string must be null - terminated , and may also
* include a single newline before its terminating null . The first character
* may also be a plus sign , but not a minus sign .
* @ base : The number base to use . The maximum supported base is 16 . If base is
* given as 0 , then the base of the string is automatically detected with the
* conventional semantics - If it begins with 0 x the number will be parsed as a
* hexadecimal ( case insensitive ) , if it otherwise begins with 0 , it will be
* parsed as an octal number . Otherwise it will be parsed as a decimal .
* @ res : Where to write the result of the conversion on success .
*
* Returns 0 on success , - ERANGE on overflow and - EINVAL on parsing error .
* Preferred over simple_strtoul ( ) . Return code must be checked .
*/
static inline int __must_check kstrtoul(const char *s, unsigned int base, unsigned long *res)
{
/*
* We want to shortcut function call , but
* _ _ builtin_types_compatible_p ( unsigned long , unsigned long long ) = 0 .
*/
if (sizeof (unsigned long ) == sizeof (unsigned long long ) &&
__alignof__(unsigned long ) == __alignof__(unsigned long long ))
return kstrtoull(s, base, (unsigned long long *)res);
else
return _kstrtoul(s, base, res);
}
/**
* kstrtol - convert a string to a long
* @ s : The start of the string . The string must be null - terminated , and may also
* include a single newline before its terminating null . The first character
* may also be a plus sign or a minus sign .
* @ base : The number base to use . The maximum supported base is 16 . If base is
* given as 0 , then the base of the string is automatically detected with the
* conventional semantics - If it begins with 0 x the number will be parsed as a
* hexadecimal ( case insensitive ) , if it otherwise begins with 0 , it will be
* parsed as an octal number . Otherwise it will be parsed as a decimal .
* @ res : Where to write the result of the conversion on success .
*
* Returns 0 on success , - ERANGE on overflow and - EINVAL on parsing error .
* Preferred over simple_strtol ( ) . Return code must be checked .
*/
static inline int __must_check kstrtol(const char *s, unsigned int base, long *res)
{
/*
* We want to shortcut function call , but
* _ _ builtin_types_compatible_p ( long , long long ) = 0 .
*/
if (sizeof (long ) == sizeof (long long ) &&
__alignof__(long ) == __alignof__(long long ))
return kstrtoll(s, base, (long long *)res);
else
return _kstrtol(s, base, res);
}
int __must_check kstrtouint(const char *s, unsigned int base, unsigned int *res);
int __must_check kstrtoint(const char *s, unsigned int base, int *res);
static inline int __must_check kstrtou64(const char *s, unsigned int base, u64 *res)
{
return kstrtoull(s, base, res);
}
static inline int __must_check kstrtos64(const char *s, unsigned int base, s64 *res)
{
return kstrtoll(s, base, res);
}
static inline int __must_check kstrtou32(const char *s, unsigned int base, u32 *res)
{
return kstrtouint(s, base, res);
}
static inline int __must_check kstrtos32(const char *s, unsigned int base, s32 *res)
{
return kstrtoint(s, base, res);
}
int __must_check kstrtou16(const char *s, unsigned int base, u16 *res);
int __must_check kstrtos16(const char *s, unsigned int base, s16 *res);
int __must_check kstrtou8(const char *s, unsigned int base, u8 *res);
int __must_check kstrtos8(const char *s, unsigned int base, s8 *res);
int __must_check kstrtobool(const char *s, bool *res);
int __must_check kstrtoull_from_user(const char __user *s, size_t count, unsigned int base, unsigned long long *res);
int __must_check kstrtoll_from_user(const char __user *s, size_t count, unsigned int base, long long *res);
int __must_check kstrtoul_from_user(const char __user *s, size_t count, unsigned int base, unsigned long *res);
int __must_check kstrtol_from_user(const char __user *s, size_t count, unsigned int base, long *res);
int __must_check kstrtouint_from_user(const char __user *s, size_t count, unsigned int base, unsigned int *res);
int __must_check kstrtoint_from_user(const char __user *s, size_t count, unsigned int base, int *res);
int __must_check kstrtou16_from_user(const char __user *s, size_t count, unsigned int base, u16 *res);
int __must_check kstrtos16_from_user(const char __user *s, size_t count, unsigned int base, s16 *res);
int __must_check kstrtou8_from_user(const char __user *s, size_t count, unsigned int base, u8 *res);
int __must_check kstrtos8_from_user(const char __user *s, size_t count, unsigned int base, s8 *res);
int __must_check kstrtobool_from_user(const char __user *s, size_t count, bool *res);
static inline int __must_check kstrtou64_from_user(const char __user *s, size_t count, unsigned int base, u64 *res)
{
return kstrtoull_from_user(s, count, base, res);
}
static inline int __must_check kstrtos64_from_user(const char __user *s, size_t count, unsigned int base, s64 *res)
{
return kstrtoll_from_user(s, count, base, res);
}
static inline int __must_check kstrtou32_from_user(const char __user *s, size_t count, unsigned int base, u32 *res)
{
return kstrtouint_from_user(s, count, base, res);
}
static inline int __must_check kstrtos32_from_user(const char __user *s, size_t count, unsigned int base, s32 *res)
{
return kstrtoint_from_user(s, count, base, res);
}
/*
* Use kstrto < foo > instead .
*
* NOTE : simple_strto < foo > does not check for the range overflow and ,
* depending on the input , may give interesting results .
*
* Use these functions if and only if you cannot use kstrto < foo > , because
* the conversion ends on the first non - digit character , which may be far
* beyond the supported range . It might be useful to parse the strings like
* 10 x50 or 12 : 21 without altering original string or temporary buffer in use .
* Keep in mind above caveat .
*/
extern unsigned long simple_strtoul(const char *,char **,unsigned int );
extern unsigned long simple_strntoul(const char *,char **,unsigned int ,size_t);
extern long simple_strtol(const char *,char **,unsigned int );
extern unsigned long long simple_strtoull(const char *,char **,unsigned int );
extern long long simple_strtoll(const char *,char **,unsigned int );
#endif /* _LINUX_KSTRTOX_H */
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