#include "num.cpp"
#include "field.cpp"
#include "group.cpp"
#include "ecmult.cpp"
#include "ecdsa.cpp"


namespace secp256k1 {

extern "C" void secp256k1_start(void) {
    secp256k1_num_start();
    secp256k1_fe_start();
    secp256k1_ge_start();
    secp256k1_ecmult_start();
}

extern "C" void secp256k1_stop(void) {
    secp256k1_ecmult_stop();
    secp256k1_ge_stop();
    secp256k1_fe_stop();
    secp256k1_num_stop();
}

extern "C" int secp256k1_ecdsa_verify(const unsigned char *msg, int msglen, const unsigned char *sig, int siglen, const unsigned char *pubkey, int pubkeylen) {
    int ret = -3;
    secp256k1_num_t m; 
    secp256k1_num_init(&m);
    Signature s;
    secp256k1_gej_t q;
    secp256k1_num_set_bin(&m, msg, msglen);
    if (!ParsePubKey(q, pubkey, pubkeylen)) {
        ret = -1;
        goto end;
    }
    if (!s.Parse(sig, siglen)) {
        fprintf(stderr, "Can't parse signature: ");
        for (int i=0; i<siglen; i++) fprintf(stderr,"%02x", sig[i]);
        fprintf(stderr, "\n");
        ret = -2;
        goto end;
    }
    if (!s.Verify(q, m)) {
        ret = 0;
        goto end;
    }
    ret = 1;
end:
    secp256k1_num_free(&m);
    return ret;
}

}