forked from mirrors/linux
fcc155008a
cpio extraction currently does a memcpy to ensure that the archive hex fields are null terminated for simple_strtoul(). simple_strntoul() will allow us to avoid the memcpy. Signed-off-by: David Disseldorp <ddiss@suse.de> Link: https://lore.kernel.org/r/20250304061020.9815-4-ddiss@suse.de Signed-off-by: Christian Brauner <brauner@kernel.org>
151 lines
6.6 KiB
C
151 lines
6.6 KiB
C
/* 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 0x 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 0x 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
|
|
* 10x50 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 */
|