-
-
Notifications
You must be signed in to change notification settings - Fork 222
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
9 changed files
with
73 additions
and
145 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,90 +1,14 @@ | ||
| #ifndef BLINK_CHECKED_H_ | ||
| #define BLINK_CHECKED_H_ | ||
| #ifndef EASYCKDINT_H_ | ||
| #define EASYCKDINT_H_ | ||
| #if defined(__has_include) && __has_include(<stdckdint.h>) | ||
| #include <stdckdint.h> | ||
| #elif defined(NDEBUG) && \ | ||
| ((defined(__GNUC__) && __GNUC__ >= 5 && !defined(__ICC)) || \ | ||
| (defined(__has_builtin) && (__has_builtin(__builtin_add_overflow) && \ | ||
| __has_builtin(__builtin_sub_overflow) && \ | ||
| __has_builtin(__builtin_mul_overflow)))) | ||
| #else | ||
|
|
||
| #define __STDC_VERSION_STDCKDINT_H__ 202311L | ||
|
|
||
| #define ckd_add(res, x, y) __builtin_add_overflow((x), (y), (res)) | ||
| #define ckd_sub(res, x, y) __builtin_sub_overflow((x), (y), (res)) | ||
| #define ckd_mul(res, x, y) __builtin_mul_overflow((x), (y), (res)) | ||
|
|
||
| #else | ||
| #include <limits.h> | ||
| #include <stdint.h> | ||
|
|
||
| #define ckd_add(res, x, y) __ckd_arithmetic(add, res, x, y) | ||
| #define ckd_sub(res, x, y) __ckd_arithmetic(sub, res, x, y) | ||
| #define ckd_mul(res, x, y) __ckd_arithmetic(mul, res, x, y) | ||
|
|
||
| #define __ckd_arithmetic(op, res, x, y) \ | ||
| (sizeof(*(res)) == sizeof(int) ? __ckd_##op((int *)(res), x, y) \ | ||
| : sizeof(*(res)) == sizeof(long long) \ | ||
| ? __ckd_##op##ll((long long *)(res), x, y) \ | ||
| : __ckd_trap()) | ||
|
|
||
| #define __ckd_mul_overflow(x, y, min, max) \ | ||
| if (x > 0) { \ | ||
| if (y > 0) { \ | ||
| if (x > max / y) { \ | ||
| return 1; \ | ||
| } \ | ||
| } else { \ | ||
| if (y < min / x) { \ | ||
| return 1; \ | ||
| } \ | ||
| } \ | ||
| } else { \ | ||
| if (y > 0) { \ | ||
| if (x < min / y) { \ | ||
| return 1; \ | ||
| } \ | ||
| } else { \ | ||
| if (x && y < max / x) { \ | ||
| return 1; \ | ||
| } \ | ||
| } \ | ||
| } \ | ||
| return 0 | ||
|
|
||
| static inline int __ckd_trap(void) { | ||
| volatile int __x = 0; | ||
| return 1 / __x; | ||
| } | ||
|
|
||
| static inline int __ckd_add(int *__z, int __x, int __y) { | ||
| unsigned int __a, __b, __c; | ||
| *__z = __c = (__a = __x) + (__b = __y); | ||
| return ((__c ^ __a) & (__c ^ __b)) >> (sizeof(int) * CHAR_BIT - 1); | ||
| } | ||
| static inline int __ckd_addll(long long *__z, long long __x, long long __y) { | ||
| unsigned long long __a, __b, __c; | ||
| *__z = __c = (__a = __x) + (__b = __y); | ||
| return ((__c ^ __a) & (__c ^ __b)) >> (sizeof(long long) * CHAR_BIT - 1); | ||
| } | ||
|
|
||
| static inline int __ckd_sub(int *__z, int __x, int __y) { | ||
| unsigned int __a, __b, __c; | ||
| *__z = __c = (__a = __x) - (__b = __y); | ||
| return ((__a ^ __b) & (__c ^ __a)) >> (sizeof(int) * CHAR_BIT - 1); | ||
| } | ||
| static inline int __ckd_subll(long long *__z, long long __x, long long __y) { | ||
| unsigned long long __a, __b, __c; | ||
| *__z = __c = (__a = __x) - (__b = __y); | ||
| return ((__a ^ __b) & (__c ^ __a)) >> (sizeof(long long) * CHAR_BIT - 1); | ||
| } | ||
|
|
||
| static inline int __ckd_mul(int *__z, int __x, int __y) { | ||
| *__z = (unsigned)__x * (unsigned)__y; | ||
| __ckd_mul_overflow(__x, __y, INT_MIN, INT_MAX); | ||
| } | ||
| static inline int __ckd_mulll(long long *__z, long long __x, long long __y) { | ||
| *__z = (unsigned long long)__x * (unsigned long long)__y; | ||
| __ckd_mul_overflow(__x, __y, LLONG_MIN, LLONG_MAX); | ||
| } | ||
|
|
||
| #endif | ||
| #endif /* BLINK_CHECKED_H_ */ | ||
| #endif /* <stdckdint.h> */ | ||
| #endif /* EASYCKDINT_H_ */ |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.