--- a/mercurial/mpatch_module.c	Wed Jul 05 11:24:22 2017 -0400
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,195 +0,0 @@
-/*
- mpatch.c - efficient binary patching for Mercurial
-
- This implements a patch algorithm that's O(m + nlog n) where m is the
- size of the output and n is the number of patches.
-
- Given a list of binary patches, it unpacks each into a hunk list,
- then combines the hunk lists with a treewise recursion to form a
- single hunk list. This hunk list is then applied to the original
- text.
-
- The text (or binary) fragments are copied directly from their source
- Python objects into a preallocated output string to avoid the
- allocation of intermediate Python objects. Working memory is about 2x
- the total number of hunks.
-
- Copyright 2005, 2006 Matt Mackall <mpm@selenic.com>
-
- This software may be used and distributed according to the terms
- of the GNU General Public License, incorporated herein by reference.
-*/
-
-#define PY_SSIZE_T_CLEAN
-#include <Python.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "util.h"
-#include "bitmanipulation.h"
-#include "compat.h"
-#include "mpatch.h"
-
-static char mpatch_doc[] = "Efficient binary patching.";
-static PyObject *mpatch_Error;
-
-static void setpyerr(int r)
-{
-	switch (r) {
-	case MPATCH_ERR_NO_MEM:
-		PyErr_NoMemory();
-		break;
-	case MPATCH_ERR_CANNOT_BE_DECODED:
-		PyErr_SetString(mpatch_Error, "patch cannot be decoded");
-		break;
-	case MPATCH_ERR_INVALID_PATCH:
-		PyErr_SetString(mpatch_Error, "invalid patch");
-		break;
-	}
-}
-
-struct mpatch_flist *cpygetitem(void *bins, ssize_t pos)
-{
-	const char *buffer;
-	struct mpatch_flist *res;
-	ssize_t blen;
-	int r;
-
-	PyObject *tmp = PyList_GetItem((PyObject*)bins, pos);
-	if (!tmp)
-		return NULL;
-	if (PyObject_AsCharBuffer(tmp, &buffer, (Py_ssize_t*)&blen))
-		return NULL;
-	if ((r = mpatch_decode(buffer, blen, &res)) < 0) {
-		if (!PyErr_Occurred())
-			setpyerr(r);
-		return NULL;
-	}
-	return res;
-}
-
-static PyObject *
-patches(PyObject *self, PyObject *args)
-{
-	PyObject *text, *bins, *result;
-	struct mpatch_flist *patch;
-	const char *in;
-	int r = 0;
-	char *out;
-	Py_ssize_t len, outlen, inlen;
-
-	if (!PyArg_ParseTuple(args, "OO:mpatch", &text, &bins))
-		return NULL;
-
-	len = PyList_Size(bins);
-	if (!len) {
-		/* nothing to do */
-		Py_INCREF(text);
-		return text;
-	}
-
-	if (PyObject_AsCharBuffer(text, &in, &inlen))
-		return NULL;
-
-	patch = mpatch_fold(bins, cpygetitem, 0, len);
-	if (!patch) { /* error already set or memory error */
-		if (!PyErr_Occurred())
-			PyErr_NoMemory();
-		return NULL;
-	}
-
-	outlen = mpatch_calcsize(inlen, patch);
-	if (outlen < 0) {
-		r = (int)outlen;
-		result = NULL;
-		goto cleanup;
-	}
-	result = PyBytes_FromStringAndSize(NULL, outlen);
-	if (!result) {
-		result = NULL;
-		goto cleanup;
-	}
-	out = PyBytes_AsString(result);
-	if ((r = mpatch_apply(out, in, inlen, patch)) < 0) {
-		Py_DECREF(result);
-		result = NULL;
-	}
-cleanup:
-	mpatch_lfree(patch);
-	if (!result && !PyErr_Occurred())
-		setpyerr(r);
-	return result;
-}
-
-/* calculate size of a patched file directly */
-static PyObject *
-patchedsize(PyObject *self, PyObject *args)
-{
-	long orig, start, end, len, outlen = 0, last = 0, pos = 0;
-	Py_ssize_t patchlen;
-	char *bin;
-
-	if (!PyArg_ParseTuple(args, "ls#", &orig, &bin, &patchlen))
-		return NULL;
-
-	while (pos >= 0 && pos < patchlen) {
-		start = getbe32(bin + pos);
-		end = getbe32(bin + pos + 4);
-		len = getbe32(bin + pos + 8);
-		if (start > end)
-			break; /* sanity check */
-		pos += 12 + len;
-		outlen += start - last;
-		last = end;
-		outlen += len;
-	}
-
-	if (pos != patchlen) {
-		if (!PyErr_Occurred())
-			PyErr_SetString(mpatch_Error, "patch cannot be decoded");
-		return NULL;
-	}
-
-	outlen += orig - last;
-	return Py_BuildValue("l", outlen);
-}
-
-static PyMethodDef methods[] = {
-	{"patches", patches, METH_VARARGS, "apply a series of patches\n"},
-	{"patchedsize", patchedsize, METH_VARARGS, "calculed patched size\n"},
-	{NULL, NULL}
-};
-
-#ifdef IS_PY3K
-static struct PyModuleDef mpatch_module = {
-	PyModuleDef_HEAD_INIT,
-	"mpatch",
-	mpatch_doc,
-	-1,
-	methods
-};
-
-PyMODINIT_FUNC PyInit_mpatch(void)
-{
-	PyObject *m;
-
-	m = PyModule_Create(&mpatch_module);
-	if (m == NULL)
-		return NULL;
-
-	mpatch_Error = PyErr_NewException("mercurial.mpatch.mpatchError",
-					  NULL, NULL);
-	Py_INCREF(mpatch_Error);
-	PyModule_AddObject(m, "mpatchError", mpatch_Error);
-
-	return m;
-}
-#else
-PyMODINIT_FUNC
-initmpatch(void)
-{
-	Py_InitModule3("mpatch", methods, mpatch_doc);
-	mpatch_Error = PyErr_NewException("mercurial.mpatch.mpatchError",
-					  NULL, NULL);
-}
-#endif