OPENSSL_hexchar2int
j = (unsigned char)OPENSSL_hexchar2int(j);
*out++ = (OPENSSL_hexchar2int(p[1]) << 4)
| OPENSSL_hexchar2int(p[2]);
hash += OPENSSL_hexchar2int(ch);
x = OPENSSL_hexchar2int(*in);
m = OPENSSL_hexchar2int(bufp[k + n]);
m = OPENSSL_hexchar2int(bufp[k + n]);
k = OPENSSL_hexchar2int(c);
cli = OPENSSL_hexchar2int(cl);
chi = OPENSSL_hexchar2int(ch);
v = OPENSSL_hexchar2int(*from);
x = OPENSSL_hexchar2int(c);
int OPENSSL_hexchar2int(unsigned char c);
x = OPENSSL_hexchar2int(*in);
hi = OPENSSL_hexchar2int(str[outer][inner]);
lo = OPENSSL_hexchar2int(str[outer][inner + 1]);