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#include "safemult.h"
int imult64(int64 a,int64 b,int64* c) {
int neg=(a<0);
if (neg) a=-a;
if (b<0) { neg^=1; b=-b; }
if (umult64(a,b,c)) return 0;
if (neg) *c=-*c;
return 1;
}