Mirror of :pserver:cvs@cvs.fefe.de:/cvs libowfat https://www.fefe.de/libowfat/
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#include "safemult.h"
int imult64(int64 a,int64 b,int64* c) {
int neg=(a<0);
uint64 d;
if (neg) a=-a;
if (b<0) { neg^=1; b=-b; }
if (!umult64(a,b,&d)) return 0;
if (d > 0x7fffffffffffffffULL + neg) return 0;
*c=(neg?-d:d);
return 1;
}