mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-07 06:53:33 +00:00
28 lines
772 B
C
28 lines
772 B
C
|
#ifndef COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_
|
||
|
|
#define COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_
|
||
|
|
#include "libc/limits.h"
|
||
|
|
COSMOPOLITAN_C_START_
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Encodes nonzero number for longjmp().
|
||
|
|
*
|
||
|
|
* This is a workaround to the fact that the value has to be non-zero.
|
||
|
|
* So we work around it by dedicating the highest bit to being a flag.
|
||
|
|
*/
|
||
|
|
static inline int EncodeLongjmp(int x) {
|
||
|
|
return x | INT_MIN;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Decodes nonzero number returned by setjmp().
|
||
|
|
*
|
||
|
|
* This is a workaround to the fact that the value has to be non-zero.
|
||
|
|
* So we work around it by dedicating the highest bit to being a flag.
|
||
|
|
*/
|
||
|
|
static inline int DecodeSetjmp(int x) {
|
||
|
|
return (int)((unsigned)x << 1) >> 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
COSMOPOLITAN_C_END_
|
||
|
|
#endif /* COSMOPOLITAN_LIBC_INTRIN_SETJMP_INTERNAL_H_ */
|