sha512_init
ATTRIBUTE_WARN_UNUSED_RET int sha512_init(sha512_context *ctx);
return sha512_init((sha512_context*)hctx);
ret = sha512_init(&ctx); EG(ret, err);
ret = sha512_init(&ctx); EG(ret, err);
LEGACY_EVP_MD_METH_TABLE(sha512_init, sha512_update, sha512_final, NULL,