ref: 24d0b8e902aa60cb0202b2fc928411e29fc40cd3
dir: /3rd/mp/mptouv.c/
#include "platform.h" #define VLDIGITS (int)(sizeof(vlong)/sizeof(mpdigit)) /* * this code assumes that a vlong is an integral number of * mpdigits long. */ mpint* uvtomp(uvlong v, mpint *b) { int s; if(b == nil){ b = mpnew(VLDIGITS*Dbits); }else mpbits(b, VLDIGITS*Dbits); b->sign = 1; for(s = 0; s < VLDIGITS; s++){ b->p[s] = v; v >>= sizeof(mpdigit)*8; } b->top = s; return mpnorm(b); } uvlong mptouv(mpint *b) { uvlong v; int s; if(b->top == 0 || b->sign < 0) return 0LL; if(b->top > VLDIGITS) return -1LL; v = 0ULL; for(s = 0; s < b->top; s++) v |= (uvlong)b->p[s]<<(s*sizeof(mpdigit)*8); return v; }