357 /* calculate size of a patched file directly */

   358 static PyObject *

   359 patchedsize(PyObject *self, PyObject *args)

   360 {

   361 	long orig, start, end, len, outlen = 0, last = 0;

   362 	int patchlen;

   363 	char *bin, *binend;

   364 	char decode[12]; /* for dealing with alignment issues */

   365 

   366 	if (!PyArg_ParseTuple(args, "ls#", &orig, &bin, &patchlen))

   367 		return NULL;

   368 

   369 	binend = bin + patchlen;

   370 

   371 	while (bin < binend) {

   372 		memcpy(decode, bin, 12);

   373 		start = ntohl(*(uint32_t *)decode);

   374 		end = ntohl(*(uint32_t *)(decode + 4));

   375 		len = ntohl(*(uint32_t *)(decode + 8));

   376 		bin += 12 + len;

   377 		outlen += start - last;

   378 		last = end;

   379 		outlen += len;

   380 	}

   381 

   382 	if (bin != binend) {

   383 		if (!PyErr_Occurred())

   384 			PyErr_SetString(mpatch_Error, "patch cannot be decoded");

   385 		return NULL;

   386 	}

   387 

   388 	outlen += orig - last;

   389 	return Py_BuildValue("l", outlen);

   390 }

   391 

   394 	{"patchedsize", patchedsize, METH_VARARGS, "calculed patched size\n"},