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utils: Change gcd function from recursive to interative #138

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utils: Change gcd function from recursive to interative #138

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8 changes: 7 additions & 1 deletion mtproto-utils.c
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,13 @@
#include "mtproto-utils.h"

static unsigned long long gcd (unsigned long long a, unsigned long long b) {
return b ? gcd (b, a % b) : a;
unsigned long long c;
while (b) {
c = a % b;
a = b;
b = c;
}
return a;
}

static int check_prime (struct tgl_state *TLS, TGLC_bn *p) {
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