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cgen: minor cleanup in cheaders.v (#10610)

pull/10617/head
yuyi 2021-06-30 03:35:36 +08:00 committed by GitHub
parent aaee251550
commit 00333806e0
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1 changed files with 46 additions and 49 deletions
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7
vlib/v/gen/c/cheaders.v
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@ -198,12 +198,10 @@ static inline bool _us64_lt(uint64_t a, int64_t b) { return a < INT64_MAX && (in
'
const c_helper_macros = '//============================== HELPER C MACROS =============================*/
//#define tos4(s, slen) ((string){.str=(s), .len=(slen)})
// _SLIT0 is used as NULL string for literal arguments
// `"" s` is used to enforce a string literal argument
#define _SLIT0 (string){.len=0}
#define _SLIT(s) ((string){.str=(byteptr)("" s), .len=(sizeof(s)-1), .is_lit=1})
//#define _SLIT(s) ((string){.str=(byteptr)("" s), .len=(sizeof(s)-1), .is_lit=1})
// take the address of an rvalue
#define ADDR(type, expr) (&((type[]){expr}[0]))
// copy something to the heap
@ -572,8 +570,7 @@ static inline uint64_t wyhash(const void *key, size_t len, uint64_t seed, const
if (_likely_(len>=4)) { a=(_wyr4(p)<<32)|_wyr4(p+((len>>3)<<2)); b=(_wyr4(p+len-4)<<32)|_wyr4(p+len-4-((len>>3)<<2)); }
else if (_likely_(len>0)) { a=_wyr3(p,len); b=0; }
else a=b=0;
}
else{
} else {
size_t i=len;
if (_unlikely_(i>48)) {
uint64_t see1=seed, see2=seed;
@ -596,7 +593,7 @@ static const uint64_t _wyp[4] = {0xa0761d6478bd642full, 0xe7037ed1a0b428dbull, 0
// a useful 64bit-64bit mix function to produce deterministic pseudo random numbers that can pass BigCrush and PractRand
static inline uint64_t wyhash64(uint64_t A, uint64_t B){ A^=0xa0761d6478bd642full; B^=0xe7037ed1a0b428dbull; _wymum(&A,&B); return _wymix(A^0xa0761d6478bd642full,B^0xe7037ed1a0b428dbull);}
//The wyrand PRNG that pass BigCrush and PractRand
// the wyrand PRNG that pass BigCrush and PractRand
static inline uint64_t wyrand(uint64_t *seed){ *seed+=0xa0761d6478bd642full; return _wymix(*seed,*seed^0xe7037ed1a0b428dbull);}
// convert any 64 bit pseudo random numbers to uniform distribution [0,1). It can be combined with wyrand, wyhash64 or wyhash.