Final step in converting to C

src/secp256k1.c

@@ -0,0 +1,48 @@
+#include "num.c"
+#include "field.c"
+#include "group.c"
+#include "ecmult.c"
+#include "ecdsa.c"
+
+void secp256k1_start(void) {
+    secp256k1_num_start();
+    secp256k1_fe_start();
+    secp256k1_ge_start();
+    secp256k1_ecmult_start();
+}
+
+void secp256k1_stop(void) {
+    secp256k1_ecmult_stop();
+    secp256k1_ge_stop();
+    secp256k1_fe_stop();
+    secp256k1_num_stop();
+}
+
+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);
+    secp256k1_ecdsa_sig_t s;
+    secp256k1_ecdsa_sig_init(&s);
+    secp256k1_gej_t q;
+    secp256k1_num_set_bin(&m, msg, msglen);
+
+    if (!secp256k1_ecdsa_pubkey_parse(&q, pubkey, pubkeylen)) {
+        ret = -1;
+        goto end;
+    }
+    if (!secp256k1_ecdsa_sig_parse(&s, sig, siglen)) {
+        ret = -2;
+        goto end;
+    }
+    if (!secp256k1_ecdsa_sig_verify(&s, &q, &m)) {
+        ret = 0;
+        goto end;
+    }
+    ret = 1;
+end:
+    secp256k1_ecdsa_sig_free(&s);
+    secp256k1_num_free(&m);
+    return ret;
+}
+