Initial efforts to make bitmsghash a valid python extension

minode/bitmsghash/bitmsghash.cpp

@@ -19,6 +19,9 @@
 
 #include "openssl/sha.h"
 
+#define PY_SSIZE_T_CLEAN
+#include <Python.h>
+
 #define HASH_SIZE 64
 #define BUFLEN 16384
 
@@ -164,3 +167,37 @@ extern "C" EXPORT unsigned long long BitmessagePOW(unsigned char * starthash, un
 	free(threaddata);
 	return successval;
 }
+
+// python module definitions
+static PyObject *
+bitmessage_pow(PyObject *self, PyObject *args)
+{
+	const char *initial_hash;
+	unsigned long long target;
+	unsigned long long nonce;
+
+	if (!PyArg_ParseTuple(args, "yK", &initial_hash, target))
+		return NULL;
+	nonce = BitmessagePOW((unsigned char *)initial_hash, target);
+	return PyLong_FromUnsignedLongLong(nonce);
+};
+
+static PyMethodDef BitmsghashMethods[] = {
+	{"bitmessage_pow", bitmessage_pow, METH_VARARGS,
+	 "Do the Bitmessage PoW and return nonce."},
+	{NULL, NULL, 0, NULL}
+};
+
+static struct PyModuleDef bitmsghashmodule = {
+	PyModuleDef_HEAD_INIT,
+	"bitmsghash",
+	"A C extension for PoW borrowed from PyBitmessage",
+	-1,
+	BitmsghashMethods
+};
+
+PyMODINIT_FUNC
+PyInit_bitmsghash(void)
+{
+	return PyModule_Create(&bitmsghashmodule);
+}