-rw-r--r-- 315 lib25519-20220726/crypto_sign/ed25519/ref10/fe_isnonzero.c raw
#include "fe.h" #include "crypto_verify_32.h" /* return 1 if f == 0 return 0 if f != 0 Preconditions: |f| bounded by 1.1*2^26,1.1*2^25,1.1*2^26,1.1*2^25,etc. */ static const unsigned char zero[32]; int fe_isnonzero(const fe f) { unsigned char s[32]; fe_tobytes(s,f); return crypto_verify_32(s,zero); }