DOKK / manpages / debian 12 / libowfat-dev / imult64.3.en
imult64(3) Library Functions Manual imult64(3)

imult64 - integer multiplication with overflow checking

#include <libowfat/safemult.h>

int imult64(int64 a,int64 b,int64* c);

imult64 does c=a*b and returns 1.

In case of an integer overflow, imult64 leaves c alone and returns 0.

imult16(3), imult32(3), umult64(3)