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Show First 20 Lines • Show All 188 Lines • ▼ Show 20 Lines	static SECP256K1_INLINE void memczero(void *s, size_t len, int flag) {
unsigned char mask = -(unsigned char) vflag;		unsigned char mask = -(unsigned char) vflag;
while (len) {		while (len) {
*p &= ~mask;		*p &= ~mask;
p++;		p++;
len--;		len--;
}		}
}		}

		/** If flag is true, set r equal to a; otherwise leave it. Constant-time. Both r and a must be initialized and non-negative.*/
		static SECP256K1_INLINE void secp256k1_int_cmov(int r, const int a, int flag) {
		unsigned int mask0, mask1, r_masked, a_masked;
		/* Casting a negative int to unsigned and back to int is implementation defined behavior */
		VERIFY_CHECK(r >= 0 && a >= 0);

		mask0 = (unsigned int)flag + ~0u;
		mask1 = ~mask0;
		r_masked = ((unsigned int)*r & mask0);
		a_masked = ((unsigned int)*a & mask1);

		*r = (int)(r_masked \| a_masked);
		}

#endif /* SECP256K1_UTIL_H */		#endif /* SECP256K1_UTIL_H */