183 static bool sliceintolist(PyObject *list, Py_ssize_t destidx,

   184                           const char *source, Py_ssize_t len)

   185 {

   186 	PyObject *sliced = PyBytes_FromStringAndSize(source, len);

   187 	if (sliced == NULL)

   188 		return false;

   189 	PyList_SET_ITEM(list, destidx, sliced);

   190 	return true;

   191 }

   192 

   193 static PyObject *splitnewlines(PyObject *self, PyObject *args)

   194 {

   195 	const char *text;

   196 	Py_ssize_t nelts = 0, size, i, start = 0;

   197 	PyObject *result = NULL;

   198 

   199 	if (!PyArg_ParseTuple(args, "s#", &text, &size)) {

   200 		goto abort;

   201 	}

   202 	if (!size) {

   203 		return PyList_New(0);

   204 	}

   205 	/* This loops to size-1 because if the last byte is a newline,

   206 	 * we don't want to perform a split there. */

   207 	for (i = 0; i < size - 1; ++i) {

   208 		if (text[i] == '\n') {

   209 			++nelts;

   210 		}

   211 	}

   212 	if ((result = PyList_New(nelts + 1)) == NULL)

   213 		goto abort;

   214 	nelts = 0;

   215 	for (i = 0; i < size - 1; ++i) {

   216 		if (text[i] == '\n') {

   217 			if (!sliceintolist(result, nelts++, text + start,

   218 			                   i - start + 1))

   219 				goto abort;

   220 			start = i + 1;

   221 		}

   222 	}

   223 	if (!sliceintolist(result, nelts++, text + start, size - start))

   224 		goto abort;

   225 	return result;

   226 abort:

   227 	Py_XDECREF(result);

   228 	return NULL;

   229 }

   230 

   237     {"splitnewlines", splitnewlines, METH_VARARGS,

   238      "like str.splitlines, but only split on newlines\n"},