diff options
Diffstat (limited to 'backport/compat/kstrtox.c')
| -rw-r--r-- | backport/compat/kstrtox.c | 237 |
1 files changed, 0 insertions, 237 deletions
diff --git a/backport/compat/kstrtox.c b/backport/compat/kstrtox.c deleted file mode 100644 index aaaea242..00000000 --- a/backport/compat/kstrtox.c +++ /dev/null @@ -1,237 +0,0 @@ -/* - * 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/kernel.h> -/* - * kstrto* was included in kernel 2.6.38.4 and causes conflicts with the - * version included in compat-drivers. We use strict_strtol to check if - * kstrto* is already available. - */ -#ifndef strict_strtoll - -#include <linux/ctype.h> -#include <linux/errno.h> -#include <linux/kernel.h> -#include <linux/math64.h> -#include <linux/module.h> -#include <linux/types.h> - -#define _tolower LINUX_BACKPORT(_tolower) -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') { - if (*(s + 1) == '\0') - break; - else - return -EINVAL; - } 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_GPL(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_GPL(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_GPL(_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_GPL(_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_GPL(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_GPL(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_GPL(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_GPL(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_GPL(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_GPL(kstrtos8); -#endif /* #ifndef strict_strtol */ |