# HG changeset patch
# User Yuya Nishihara <y...@tcha.org>
# Date 1501507707 -32400
#      Mon Jul 31 22:28:27 2017 +0900
# Node ID ef7755af442bdbbbe95c0d75e9375ab17cdb970f
# Parent  9079b0e5c83687ce5c918fc1364a190033408ea5
cext: split character encoding functions to new compilation unit

This extracts charencode.c from parsers.c, which seems big enough for me
to hesitate to add new JSON functions. Still charencode.o is linked to
parsers.so to avoid duplication of binary codes.

diff --git a/mercurial/cext/parsers.c b/mercurial/cext/charencode.c
copy from mercurial/cext/parsers.c
copy to mercurial/cext/charencode.c
--- a/mercurial/cext/parsers.c
+++ b/mercurial/cext/charencode.c
@@ -1,5 +1,5 @@
 /*
- parsers.c - efficient content parsing
+ charencode.c - miscellaneous character encoding
 
  Copyright 2008 Matt Mackall <m...@selenic.com> and others
 
@@ -8,26 +8,8 @@
 */
 
 #include <Python.h>
-#include <ctype.h>
-#include <stddef.h>
-#include <string.h>
 
 #include "util.h"
-#include "bitmanipulation.h"
-
-#ifdef IS_PY3K
-/* The mapping of Python types is meant to be temporary to get Python
- * 3 to compile. We should remove this once Python 3 support is fully
- * supported and proper types are used in the extensions themselves. */
-#define PyInt_Type PyLong_Type
-#define PyInt_Check PyLong_Check
-#define PyInt_FromLong PyLong_FromLong
-#define PyInt_FromSsize_t PyLong_FromSsize_t
-#define PyInt_AS_LONG PyLong_AS_LONG
-#define PyInt_AsLong PyLong_AsLong
-#endif
-
-static const char *const versionerrortext = "Python minor version mismatch";
 
 static const char lowertable[128] = {
        '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
@@ -139,7 +121,7 @@ quit:
        return ret;
 }
 
-static PyObject *asciilower(PyObject *self, PyObject *args)
+PyObject *asciilower(PyObject *self, PyObject *args)
 {
        PyObject *str_obj;
        if (!PyArg_ParseTuple(args, "O!:asciilower", &PyBytes_Type, &str_obj))
@@ -147,7 +129,7 @@ static PyObject *asciilower(PyObject *se
        return _asciitransform(str_obj, lowertable, NULL);
 }
 
-static PyObject *asciiupper(PyObject *self, PyObject *args)
+PyObject *asciiupper(PyObject *self, PyObject *args)
 {
        PyObject *str_obj;
        if (!PyArg_ParseTuple(args, "O!:asciiupper", &PyBytes_Type, &str_obj))
@@ -155,17 +137,7 @@ static PyObject *asciiupper(PyObject *se
        return _asciitransform(str_obj, uppertable, NULL);
 }
 
-static PyObject *dict_new_presized(PyObject *self, PyObject *args)
-{
-       Py_ssize_t expected_size;
-
-       if (!PyArg_ParseTuple(args, "n:make_presized_dict", &expected_size))
-               return NULL;
-
-       return _dict_new_presized(expected_size);
-}
-
-static PyObject *make_file_foldmap(PyObject *self, PyObject *args)
+PyObject *make_file_foldmap(PyObject *self, PyObject *args)
 {
        PyObject *dmap, *spec_obj, *normcase_fallback;
        PyObject *file_foldmap = NULL;
@@ -235,763 +207,3 @@ quit:
        Py_XDECREF(file_foldmap);
        return NULL;
 }
-
-/*
- * This code assumes that a manifest is stitched together with newline
- * ('\n') characters.
- */
-static PyObject *parse_manifest(PyObject *self, PyObject *args)
-{
-       PyObject *mfdict, *fdict;
-       char *str, *start, *end;
-       int len;
-
-       if (!PyArg_ParseTuple(args, "O!O!s#:parse_manifest",
-                             &PyDict_Type, &mfdict,
-                             &PyDict_Type, &fdict,
-                             &str, &len))
-               goto quit;
-
-       start = str;
-       end = str + len;
-       while (start < end) {
-               PyObject *file = NULL, *node = NULL;
-               PyObject *flags = NULL;
-               char *zero = NULL, *newline = NULL;
-               ptrdiff_t nlen;
-
-               zero = memchr(start, '\0', end - start);
-               if (!zero) {
-                       PyErr_SetString(PyExc_ValueError,
-                                       "manifest entry has no separator");
-                       goto quit;
-               }
-
-               newline = memchr(zero + 1, '\n', end - (zero + 1));
-               if (!newline) {
-                       PyErr_SetString(PyExc_ValueError,
-                                       "manifest contains trailing garbage");
-                       goto quit;
-               }
-
-               file = PyBytes_FromStringAndSize(start, zero - start);
-
-               if (!file)
-                       goto bail;
-
-               nlen = newline - zero - 1;
-
-               node = unhexlify(zero + 1, nlen > 40 ? 40 : (int)nlen);
-               if (!node)
-                       goto bail;
-
-               if (nlen > 40) {
-                       flags = PyBytes_FromStringAndSize(zero + 41,
-                                                          nlen - 40);
-                       if (!flags)
-                               goto bail;
-
-                       if (PyDict_SetItem(fdict, file, flags) == -1)
-                               goto bail;
-               }
-
-               if (PyDict_SetItem(mfdict, file, node) == -1)
-                       goto bail;
-
-               start = newline + 1;
-
-               Py_XDECREF(flags);
-               Py_XDECREF(node);
-               Py_XDECREF(file);
-               continue;
-       bail:
-               Py_XDECREF(flags);
-               Py_XDECREF(node);
-               Py_XDECREF(file);
-               goto quit;
-       }
-
-       Py_INCREF(Py_None);
-       return Py_None;
-quit:
-       return NULL;
-}
-
-static inline dirstateTupleObject *make_dirstate_tuple(char state, int mode,
-                                                      int size, int mtime)
-{
-       dirstateTupleObject *t = PyObject_New(dirstateTupleObject,
-                                             &dirstateTupleType);
-       if (!t)
-               return NULL;
-       t->state = state;
-       t->mode = mode;
-       t->size = size;
-       t->mtime = mtime;
-       return t;
-}
-
-static PyObject *dirstate_tuple_new(PyTypeObject *subtype, PyObject *args,
-                                   PyObject *kwds)
-{
-       /* We do all the initialization here and not a tp_init function because
-        * dirstate_tuple is immutable. */
-       dirstateTupleObject *t;
-       char state;
-       int size, mode, mtime;
-       if (!PyArg_ParseTuple(args, "ciii", &state, &mode, &size, &mtime))
-               return NULL;
-
-       t = (dirstateTupleObject *)subtype->tp_alloc(subtype, 1);
-       if (!t)
-               return NULL;
-       t->state = state;
-       t->mode = mode;
-       t->size = size;
-       t->mtime = mtime;
-
-       return (PyObject *)t;
-}
-
-static void dirstate_tuple_dealloc(PyObject *o)
-{
-       PyObject_Del(o);
-}
-
-static Py_ssize_t dirstate_tuple_length(PyObject *o)
-{
-       return 4;
-}
-
-static PyObject *dirstate_tuple_item(PyObject *o, Py_ssize_t i)
-{
-       dirstateTupleObject *t = (dirstateTupleObject *)o;
-       switch (i) {
-       case 0:
-               return PyBytes_FromStringAndSize(&t->state, 1);
-       case 1:
-               return PyInt_FromLong(t->mode);
-       case 2:
-               return PyInt_FromLong(t->size);
-       case 3:
-               return PyInt_FromLong(t->mtime);
-       default:
-               PyErr_SetString(PyExc_IndexError, "index out of range");
-               return NULL;
-       }
-}
-
-static PySequenceMethods dirstate_tuple_sq = {
-       dirstate_tuple_length,     /* sq_length */
-       0,                         /* sq_concat */
-       0,                         /* sq_repeat */
-       dirstate_tuple_item,       /* sq_item */
-       0,                         /* sq_ass_item */
-       0,                         /* sq_contains */
-       0,                         /* sq_inplace_concat */
-       0                          /* sq_inplace_repeat */
-};
-
-PyTypeObject dirstateTupleType = {
-       PyVarObject_HEAD_INIT(NULL, 0)
-       "dirstate_tuple",          /* tp_name */
-       sizeof(dirstateTupleObject),/* tp_basicsize */
-       0,                         /* tp_itemsize */
-       (destructor)dirstate_tuple_dealloc, /* tp_dealloc */
-       0,                         /* tp_print */
-       0,                         /* tp_getattr */
-       0,                         /* tp_setattr */
-       0,                         /* tp_compare */
-       0,                         /* tp_repr */
-       0,                         /* tp_as_number */
-       &dirstate_tuple_sq,        /* tp_as_sequence */
-       0,                         /* tp_as_mapping */
-       0,                         /* tp_hash  */
-       0,                         /* tp_call */
-       0,                         /* tp_str */
-       0,                         /* tp_getattro */
-       0,                         /* tp_setattro */
-       0,                         /* tp_as_buffer */
-       Py_TPFLAGS_DEFAULT,        /* tp_flags */
-       "dirstate tuple",          /* tp_doc */
-       0,                         /* tp_traverse */
-       0,                         /* tp_clear */
-       0,                         /* tp_richcompare */
-       0,                         /* tp_weaklistoffset */
-       0,                         /* tp_iter */
-       0,                         /* tp_iternext */
-       0,                         /* tp_methods */
-       0,                         /* tp_members */
-       0,                         /* tp_getset */
-       0,                         /* tp_base */
-       0,                         /* tp_dict */
-       0,                         /* tp_descr_get */
-       0,                         /* tp_descr_set */
-       0,                         /* tp_dictoffset */
-       0,                         /* tp_init */
-       0,                         /* tp_alloc */
-       dirstate_tuple_new,        /* tp_new */
-};
-
-static PyObject *parse_dirstate(PyObject *self, PyObject *args)
-{
-       PyObject *dmap, *cmap, *parents = NULL, *ret = NULL;
-       PyObject *fname = NULL, *cname = NULL, *entry = NULL;
-       char state, *cur, *str, *cpos;
-       int mode, size, mtime;
-       unsigned int flen, len, pos = 40;
-       int readlen;
-
-       if (!PyArg_ParseTuple(args, "O!O!s#:parse_dirstate",
-                             &PyDict_Type, &dmap,
-                             &PyDict_Type, &cmap,
-                             &str, &readlen))
-               goto quit;
-
-       len = readlen;
-
-       /* read parents */
-       if (len < 40) {
-               PyErr_SetString(
-                       PyExc_ValueError, "too little data for parents");
-               goto quit;
-       }
-
-       parents = Py_BuildValue("s#s#", str, 20, str + 20, 20);
-       if (!parents)
-               goto quit;
-
-       /* read filenames */
-       while (pos >= 40 && pos < len) {
-               if (pos + 17 > len) {
-                       PyErr_SetString(PyExc_ValueError,
-                                       "overflow in dirstate");
-                       goto quit;
-               }
-               cur = str + pos;
-               /* unpack header */
-               state = *cur;
-               mode = getbe32(cur + 1);
-               size = getbe32(cur + 5);
-               mtime = getbe32(cur + 9);
-               flen = getbe32(cur + 13);
-               pos += 17;
-               cur += 17;
-               if (flen > len - pos) {
-                       PyErr_SetString(PyExc_ValueError, "overflow in 
dirstate");
-                       goto quit;
-               }
-
-               entry = (PyObject *)make_dirstate_tuple(state, mode, size,
-                                                       mtime);
-               cpos = memchr(cur, 0, flen);
-               if (cpos) {
-                       fname = PyBytes_FromStringAndSize(cur, cpos - cur);
-                       cname = PyBytes_FromStringAndSize(cpos + 1,
-                                                          flen - (cpos - cur) 
- 1);
-                       if (!fname || !cname ||
-                           PyDict_SetItem(cmap, fname, cname) == -1 ||
-                           PyDict_SetItem(dmap, fname, entry) == -1)
-                               goto quit;
-                       Py_DECREF(cname);
-               } else {
-                       fname = PyBytes_FromStringAndSize(cur, flen);
-                       if (!fname ||
-                           PyDict_SetItem(dmap, fname, entry) == -1)
-                               goto quit;
-               }
-               Py_DECREF(fname);
-               Py_DECREF(entry);
-               fname = cname = entry = NULL;
-               pos += flen;
-       }
-
-       ret = parents;
-       Py_INCREF(ret);
-quit:
-       Py_XDECREF(fname);
-       Py_XDECREF(cname);
-       Py_XDECREF(entry);
-       Py_XDECREF(parents);
-       return ret;
-}
-
-/*
- * Build a set of non-normal and other parent entries from the dirstate dmap
-*/
-static PyObject *nonnormalotherparententries(PyObject *self, PyObject *args) {
-       PyObject *dmap, *fname, *v;
-       PyObject *nonnset = NULL, *otherpset = NULL, *result = NULL;
-       Py_ssize_t pos;
-
-       if (!PyArg_ParseTuple(args, "O!:nonnormalentries",
-                             &PyDict_Type, &dmap))
-               goto bail;
-
-       nonnset = PySet_New(NULL);
-       if (nonnset == NULL)
-               goto bail;
-
-       otherpset = PySet_New(NULL);
-       if (otherpset == NULL)
-               goto bail;
-
-       pos = 0;
-       while (PyDict_Next(dmap, &pos, &fname, &v)) {
-               dirstateTupleObject *t;
-               if (!dirstate_tuple_check(v)) {
-                       PyErr_SetString(PyExc_TypeError,
-                                       "expected a dirstate tuple");
-                       goto bail;
-               }
-               t = (dirstateTupleObject *)v;
-
-               if (t->state == 'n' && t->size == -2) {
-                       if (PySet_Add(otherpset, fname) == -1) {
-                               goto bail;
-                       }
-               }
-
-               if (t->state == 'n' && t->mtime != -1)
-                       continue;
-               if (PySet_Add(nonnset, fname) == -1)
-                       goto bail;
-       }
-
-       result = Py_BuildValue("(OO)", nonnset, otherpset);
-       if (result == NULL)
-               goto bail;
-       Py_DECREF(nonnset);
-       Py_DECREF(otherpset);
-       return result;
-bail:
-       Py_XDECREF(nonnset);
-       Py_XDECREF(otherpset);
-       Py_XDECREF(result);
-       return NULL;
-}
-
-/*
- * Efficiently pack a dirstate object into its on-disk format.
- */
-static PyObject *pack_dirstate(PyObject *self, PyObject *args)
-{
-       PyObject *packobj = NULL;
-       PyObject *map, *copymap, *pl, *mtime_unset = NULL;
-       Py_ssize_t nbytes, pos, l;
-       PyObject *k, *v = NULL, *pn;
-       char *p, *s;
-       int now;
-
-       if (!PyArg_ParseTuple(args, "O!O!Oi:pack_dirstate",
-                             &PyDict_Type, &map, &PyDict_Type, &copymap,
-                             &pl, &now))
-               return NULL;
-
-       if (!PySequence_Check(pl) || PySequence_Size(pl) != 2) {
-               PyErr_SetString(PyExc_TypeError, "expected 2-element sequence");
-               return NULL;
-       }
-
-       /* Figure out how much we need to allocate. */
-       for (nbytes = 40, pos = 0; PyDict_Next(map, &pos, &k, &v);) {
-               PyObject *c;
-               if (!PyBytes_Check(k)) {
-                       PyErr_SetString(PyExc_TypeError, "expected string key");
-                       goto bail;
-               }
-               nbytes += PyBytes_GET_SIZE(k) + 17;
-               c = PyDict_GetItem(copymap, k);
-               if (c) {
-                       if (!PyBytes_Check(c)) {
-                               PyErr_SetString(PyExc_TypeError,
-                                               "expected string key");
-                               goto bail;
-                       }
-                       nbytes += PyBytes_GET_SIZE(c) + 1;
-               }
-       }
-
-       packobj = PyBytes_FromStringAndSize(NULL, nbytes);
-       if (packobj == NULL)
-               goto bail;
-
-       p = PyBytes_AS_STRING(packobj);
-
-       pn = PySequence_ITEM(pl, 0);
-       if (PyBytes_AsStringAndSize(pn, &s, &l) == -1 || l != 20) {
-               PyErr_SetString(PyExc_TypeError, "expected a 20-byte hash");
-               goto bail;
-       }
-       memcpy(p, s, l);
-       p += 20;
-       pn = PySequence_ITEM(pl, 1);
-       if (PyBytes_AsStringAndSize(pn, &s, &l) == -1 || l != 20) {
-               PyErr_SetString(PyExc_TypeError, "expected a 20-byte hash");
-               goto bail;
-       }
-       memcpy(p, s, l);
-       p += 20;
-
-       for (pos = 0; PyDict_Next(map, &pos, &k, &v); ) {
-               dirstateTupleObject *tuple;
-               char state;
-               int mode, size, mtime;
-               Py_ssize_t len, l;
-               PyObject *o;
-               char *t;
-
-               if (!dirstate_tuple_check(v)) {
-                       PyErr_SetString(PyExc_TypeError,
-                                       "expected a dirstate tuple");
-                       goto bail;
-               }
-               tuple = (dirstateTupleObject *)v;
-
-               state = tuple->state;
-               mode = tuple->mode;
-               size = tuple->size;
-               mtime = tuple->mtime;
-               if (state == 'n' && mtime == now) {
-                       /* See pure/parsers.py:pack_dirstate for why we do
-                        * this. */
-                       mtime = -1;
-                       mtime_unset = (PyObject *)make_dirstate_tuple(
-                               state, mode, size, mtime);
-                       if (!mtime_unset)
-                               goto bail;
-                       if (PyDict_SetItem(map, k, mtime_unset) == -1)
-                               goto bail;
-                       Py_DECREF(mtime_unset);
-                       mtime_unset = NULL;
-               }
-               *p++ = state;
-               putbe32((uint32_t)mode, p);
-               putbe32((uint32_t)size, p + 4);
-               putbe32((uint32_t)mtime, p + 8);
-               t = p + 12;
-               p += 16;
-               len = PyBytes_GET_SIZE(k);
-               memcpy(p, PyBytes_AS_STRING(k), len);
-               p += len;
-               o = PyDict_GetItem(copymap, k);
-               if (o) {
-                       *p++ = '\0';
-                       l = PyBytes_GET_SIZE(o);
-                       memcpy(p, PyBytes_AS_STRING(o), l);
-                       p += l;
-                       len += l + 1;
-               }
-               putbe32((uint32_t)len, t);
-       }
-
-       pos = p - PyBytes_AS_STRING(packobj);
-       if (pos != nbytes) {
-               PyErr_Format(PyExc_SystemError, "bad dirstate size: %ld != %ld",
-                             (long)pos, (long)nbytes);
-               goto bail;
-       }
-
-       return packobj;
-bail:
-       Py_XDECREF(mtime_unset);
-       Py_XDECREF(packobj);
-       Py_XDECREF(v);
-       return NULL;
-}
-
-#define BUMPED_FIX 1
-#define USING_SHA_256 2
-#define FM1_HEADER_SIZE (4 + 8 + 2 + 2 + 1 + 1 + 1)
-
-static PyObject *readshas(
-       const char *source, unsigned char num, Py_ssize_t hashwidth)
-{
-       int i;
-       PyObject *list = PyTuple_New(num);
-       if (list == NULL) {
-               return NULL;
-       }
-       for (i = 0; i < num; i++) {
-               PyObject *hash = PyBytes_FromStringAndSize(source, hashwidth);
-               if (hash == NULL) {
-                       Py_DECREF(list);
-                       return NULL;
-               }
-               PyTuple_SET_ITEM(list, i, hash);
-               source += hashwidth;
-       }
-       return list;
-}
-
-static PyObject *fm1readmarker(const char *databegin, const char *dataend,
-                              uint32_t *msize)
-{
-       const char *data = databegin;
-       const char *meta;
-
-       double mtime;
-       int16_t tz;
-       uint16_t flags;
-       unsigned char nsuccs, nparents, nmetadata;
-       Py_ssize_t hashwidth = 20;
-
-       PyObject *prec = NULL, *parents = NULL, *succs = NULL;
-       PyObject *metadata = NULL, *ret = NULL;
-       int i;
-
-       if (data + FM1_HEADER_SIZE > dataend) {
-               goto overflow;
-       }
-
-       *msize = getbe32(data);
-       data += 4;
-       mtime = getbefloat64(data);
-       data += 8;
-       tz = getbeint16(data);
-       data += 2;
-       flags = getbeuint16(data);
-       data += 2;
-
-       if (flags & USING_SHA_256) {
-               hashwidth = 32;
-       }
-
-       nsuccs = (unsigned char)(*data++);
-       nparents = (unsigned char)(*data++);
-       nmetadata = (unsigned char)(*data++);
-
-       if (databegin + *msize > dataend) {
-               goto overflow;
-       }
-       dataend = databegin + *msize;  /* narrow down to marker size */
-
-       if (data + hashwidth > dataend) {
-               goto overflow;
-       }
-       prec = PyBytes_FromStringAndSize(data, hashwidth);
-       data += hashwidth;
-       if (prec == NULL) {
-               goto bail;
-       }
-
-       if (data + nsuccs * hashwidth > dataend) {
-               goto overflow;
-       }
-       succs = readshas(data, nsuccs, hashwidth);
-       if (succs == NULL) {
-               goto bail;
-       }
-       data += nsuccs * hashwidth;
-
-       if (nparents == 1 || nparents == 2) {
-               if (data + nparents * hashwidth > dataend) {
-                       goto overflow;
-               }
-               parents = readshas(data, nparents, hashwidth);
-               if (parents == NULL) {
-                       goto bail;
-               }
-               data += nparents * hashwidth;
-       } else {
-               parents = Py_None;
-               Py_INCREF(parents);
-       }
-
-       if (data + 2 * nmetadata > dataend) {
-               goto overflow;
-       }
-       meta = data + (2 * nmetadata);
-       metadata = PyTuple_New(nmetadata);
-       if (metadata == NULL) {
-               goto bail;
-       }
-       for (i = 0; i < nmetadata; i++) {
-               PyObject *tmp, *left = NULL, *right = NULL;
-               Py_ssize_t leftsize = (unsigned char)(*data++);
-               Py_ssize_t rightsize = (unsigned char)(*data++);
-               if (meta + leftsize + rightsize > dataend) {
-                       goto overflow;
-               }
-               left = PyBytes_FromStringAndSize(meta, leftsize);
-               meta += leftsize;
-               right = PyBytes_FromStringAndSize(meta, rightsize);
-               meta += rightsize;
-               tmp = PyTuple_New(2);
-               if (!left || !right || !tmp) {
-                       Py_XDECREF(left);
-                       Py_XDECREF(right);
-                       Py_XDECREF(tmp);
-                       goto bail;
-               }
-               PyTuple_SET_ITEM(tmp, 0, left);
-               PyTuple_SET_ITEM(tmp, 1, right);
-               PyTuple_SET_ITEM(metadata, i, tmp);
-       }
-       ret = Py_BuildValue("(OOHO(di)O)", prec, succs, flags,
-                           metadata, mtime, (int)tz * 60, parents);
-       goto bail;  /* return successfully */
-
-overflow:
-       PyErr_SetString(PyExc_ValueError, "overflow in obsstore");
-bail:
-       Py_XDECREF(prec);
-       Py_XDECREF(succs);
-       Py_XDECREF(metadata);
-       Py_XDECREF(parents);
-       return ret;
-}
-
-
-static PyObject *fm1readmarkers(PyObject *self, PyObject *args) {
-       const char *data, *dataend;
-       int datalen;
-       Py_ssize_t offset, stop;
-       PyObject *markers = NULL;
-
-       if (!PyArg_ParseTuple(args, "s#nn", &data, &datalen, &offset, &stop)) {
-               return NULL;
-       }
-       dataend = data + datalen;
-       data += offset;
-       markers = PyList_New(0);
-       if (!markers) {
-               return NULL;
-       }
-       while (offset < stop) {
-               uint32_t msize;
-               int error;
-               PyObject *record = fm1readmarker(data, dataend, &msize);
-               if (!record) {
-                       goto bail;
-               }
-               error = PyList_Append(markers, record);
-               Py_DECREF(record);
-               if (error) {
-                       goto bail;
-               }
-               data += msize;
-               offset += msize;
-       }
-       return markers;
-bail:
-       Py_DECREF(markers);
-       return NULL;
-}
-
-static char parsers_doc[] = "Efficient content parsing.";
-
-PyObject *encodedir(PyObject *self, PyObject *args);
-PyObject *pathencode(PyObject *self, PyObject *args);
-PyObject *lowerencode(PyObject *self, PyObject *args);
-PyObject *parse_index2(PyObject *self, PyObject *args);
-
-static PyMethodDef methods[] = {
-       {"pack_dirstate", pack_dirstate, METH_VARARGS, "pack a dirstate\n"},
-       {"nonnormalotherparententries", nonnormalotherparententries, 
METH_VARARGS,
-       "create a set containing non-normal and other parent entries of given "
-       "dirstate\n"},
-       {"parse_manifest", parse_manifest, METH_VARARGS, "parse a manifest\n"},
-       {"parse_dirstate", parse_dirstate, METH_VARARGS, "parse a dirstate\n"},
-       {"parse_index2", parse_index2, METH_VARARGS, "parse a revlog index\n"},
-       {"asciilower", asciilower, METH_VARARGS, "lowercase an ASCII string\n"},
-       {"asciiupper", asciiupper, METH_VARARGS, "uppercase an ASCII string\n"},
-       {"dict_new_presized", dict_new_presized, METH_VARARGS,
-        "construct a dict with an expected size\n"},
-       {"make_file_foldmap", make_file_foldmap, METH_VARARGS,
-        "make file foldmap\n"},
-       {"encodedir", encodedir, METH_VARARGS, "encodedir a path\n"},
-       {"pathencode", pathencode, METH_VARARGS, "fncache-encode a path\n"},
-       {"lowerencode", lowerencode, METH_VARARGS, "lower-encode a path\n"},
-       {"fm1readmarkers", fm1readmarkers, METH_VARARGS,
-                       "parse v1 obsolete markers\n"},
-       {NULL, NULL}
-};
-
-void dirs_module_init(PyObject *mod);
-void manifest_module_init(PyObject *mod);
-void revlog_module_init(PyObject *mod);
-
-static const int version = 1;
-
-static void module_init(PyObject *mod)
-{
-       PyModule_AddIntConstant(mod, "version", version);
-
-       /* This module constant has two purposes.  First, it lets us unit test
-        * the ImportError raised without hard-coding any error text.  This
-        * means we can change the text in the future without breaking tests,
-        * even across changesets without a recompile.  Second, its presence
-        * can be used to determine whether the version-checking logic is
-        * present, which also helps in testing across changesets without a
-        * recompile.  Note that this means the pure-Python version of parsers
-        * should not have this module constant. */
-       PyModule_AddStringConstant(mod, "versionerrortext", versionerrortext);
-
-       dirs_module_init(mod);
-       manifest_module_init(mod);
-       revlog_module_init(mod);
-
-       if (PyType_Ready(&dirstateTupleType) < 0)
-               return;
-       Py_INCREF(&dirstateTupleType);
-       PyModule_AddObject(mod, "dirstatetuple",
-                          (PyObject *)&dirstateTupleType);
-}
-
-static int check_python_version(void)
-{
-       PyObject *sys = PyImport_ImportModule("sys"), *ver;
-       long hexversion;
-       if (!sys)
-               return -1;
-       ver = PyObject_GetAttrString(sys, "hexversion");
-       Py_DECREF(sys);
-       if (!ver)
-               return -1;
-       hexversion = PyInt_AsLong(ver);
-       Py_DECREF(ver);
-       /* sys.hexversion is a 32-bit number by default, so the -1 case
-        * should only occur in unusual circumstances (e.g. if sys.hexversion
-        * is manually set to an invalid value). */
-       if ((hexversion == -1) || (hexversion >> 16 != PY_VERSION_HEX >> 16)) {
-               PyErr_Format(PyExc_ImportError, "%s: The Mercurial extension "
-                       "modules were compiled with Python " PY_VERSION ", but "
-                       "Mercurial is currently using Python with 
sys.hexversion=%ld: "
-                       "Python %s\n at: %s", versionerrortext, hexversion,
-                       Py_GetVersion(), Py_GetProgramFullPath());
-               return -1;
-       }
-       return 0;
-}
-
-#ifdef IS_PY3K
-static struct PyModuleDef parsers_module = {
-       PyModuleDef_HEAD_INIT,
-       "parsers",
-       parsers_doc,
-       -1,
-       methods
-};
-
-PyMODINIT_FUNC PyInit_parsers(void)
-{
-       PyObject *mod;
-
-       if (check_python_version() == -1)
-               return NULL;
-       mod = PyModule_Create(&parsers_module);
-       module_init(mod);
-       return mod;
-}
-#else
-PyMODINIT_FUNC initparsers(void)
-{
-       PyObject *mod;
-
-       if (check_python_version() == -1)
-               return;
-       mod = Py_InitModule3("parsers", methods, parsers_doc);
-       module_init(mod);
-}
-#endif
diff --git a/mercurial/cext/manifest.c b/mercurial/cext/manifest.c
--- a/mercurial/cext/manifest.c
+++ b/mercurial/cext/manifest.c
@@ -38,7 +38,7 @@ typedef struct {
 #define MANIFEST_NOT_SORTED -2
 #define MANIFEST_MALFORMED -3
 
-/* defined in parsers.c */
+/* defined in charencode.c */
 PyObject *unhexlify(const char *str, int len);
 
 /* get the length of the path for a line */
diff --git a/mercurial/cext/parsers.c b/mercurial/cext/parsers.c
--- a/mercurial/cext/parsers.c
+++ b/mercurial/cext/parsers.c
@@ -29,131 +29,11 @@
 
 static const char *const versionerrortext = "Python minor version mismatch";
 
-static const char lowertable[128] = {
-       '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
-       '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f',
-       '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17',
-       '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f',
-       '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27',
-       '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f',
-       '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37',
-       '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f',
-       '\x40',
-               '\x61', '\x62', '\x63', '\x64', '\x65', '\x66', '\x67', /* A-G 
*/
-       '\x68', '\x69', '\x6a', '\x6b', '\x6c', '\x6d', '\x6e', '\x6f', /* H-O 
*/
-       '\x70', '\x71', '\x72', '\x73', '\x74', '\x75', '\x76', '\x77', /* P-W 
*/
-       '\x78', '\x79', '\x7a',                                         /* X-Z 
*/
-                               '\x5b', '\x5c', '\x5d', '\x5e', '\x5f',
-       '\x60', '\x61', '\x62', '\x63', '\x64', '\x65', '\x66', '\x67',
-       '\x68', '\x69', '\x6a', '\x6b', '\x6c', '\x6d', '\x6e', '\x6f',
-       '\x70', '\x71', '\x72', '\x73', '\x74', '\x75', '\x76', '\x77',
-       '\x78', '\x79', '\x7a', '\x7b', '\x7c', '\x7d', '\x7e', '\x7f'
-};
-
-static const char uppertable[128] = {
-       '\x00', '\x01', '\x02', '\x03', '\x04', '\x05', '\x06', '\x07',
-       '\x08', '\x09', '\x0a', '\x0b', '\x0c', '\x0d', '\x0e', '\x0f',
-       '\x10', '\x11', '\x12', '\x13', '\x14', '\x15', '\x16', '\x17',
-       '\x18', '\x19', '\x1a', '\x1b', '\x1c', '\x1d', '\x1e', '\x1f',
-       '\x20', '\x21', '\x22', '\x23', '\x24', '\x25', '\x26', '\x27',
-       '\x28', '\x29', '\x2a', '\x2b', '\x2c', '\x2d', '\x2e', '\x2f',
-       '\x30', '\x31', '\x32', '\x33', '\x34', '\x35', '\x36', '\x37',
-       '\x38', '\x39', '\x3a', '\x3b', '\x3c', '\x3d', '\x3e', '\x3f',
-       '\x40', '\x41', '\x42', '\x43', '\x44', '\x45', '\x46', '\x47',
-       '\x48', '\x49', '\x4a', '\x4b', '\x4c', '\x4d', '\x4e', '\x4f',
-       '\x50', '\x51', '\x52', '\x53', '\x54', '\x55', '\x56', '\x57',
-       '\x58', '\x59', '\x5a', '\x5b', '\x5c', '\x5d', '\x5e', '\x5f',
-       '\x60',
-               '\x41', '\x42', '\x43', '\x44', '\x45', '\x46', '\x47', /* a-g 
*/
-       '\x48', '\x49', '\x4a', '\x4b', '\x4c', '\x4d', '\x4e', '\x4f', /* h-o 
*/
-       '\x50', '\x51', '\x52', '\x53', '\x54', '\x55', '\x56', '\x57', /* p-w 
*/
-       '\x58', '\x59', '\x5a',                                         /* x-z 
*/
-                               '\x7b', '\x7c', '\x7d', '\x7e', '\x7f'
-};
-
-/*
- * Turn a hex-encoded string into binary.
- */
-PyObject *unhexlify(const char *str, int len)
-{
-       PyObject *ret;
-       char *d;
-       int i;
-
-       ret = PyBytes_FromStringAndSize(NULL, len / 2);
-
-       if (!ret)
-               return NULL;
-
-       d = PyBytes_AsString(ret);
-
-       for (i = 0; i < len;) {
-               int hi = hexdigit(str, i++);
-               int lo = hexdigit(str, i++);
-               *d++ = (hi << 4) | lo;
-       }
-
-       return ret;
-}
-
-static inline PyObject *_asciitransform(PyObject *str_obj,
-                                       const char table[128],
-                                       PyObject *fallback_fn)
-{
-       char *str, *newstr;
-       Py_ssize_t i, len;
-       PyObject *newobj = NULL;
-       PyObject *ret = NULL;
-
-       str = PyBytes_AS_STRING(str_obj);
-       len = PyBytes_GET_SIZE(str_obj);
-
-       newobj = PyBytes_FromStringAndSize(NULL, len);
-       if (!newobj)
-               goto quit;
-
-       newstr = PyBytes_AS_STRING(newobj);
-
-       for (i = 0; i < len; i++) {
-               char c = str[i];
-               if (c & 0x80) {
-                       if (fallback_fn != NULL) {
-                               ret = PyObject_CallFunctionObjArgs(fallback_fn,
-                                       str_obj, NULL);
-                       } else {
-                               PyObject *err = PyUnicodeDecodeError_Create(
-                                       "ascii", str, len, i, (i + 1),
-                                       "unexpected code byte");
-                               PyErr_SetObject(PyExc_UnicodeDecodeError, err);
-                               Py_XDECREF(err);
-                       }
-                       goto quit;
-               }
-               newstr[i] = table[(unsigned char)c];
-       }
-
-       ret = newobj;
-       Py_INCREF(ret);
-quit:
-       Py_XDECREF(newobj);
-       return ret;
-}
-
-static PyObject *asciilower(PyObject *self, PyObject *args)
-{
-       PyObject *str_obj;
-       if (!PyArg_ParseTuple(args, "O!:asciilower", &PyBytes_Type, &str_obj))
-               return NULL;
-       return _asciitransform(str_obj, lowertable, NULL);
-}
-
-static PyObject *asciiupper(PyObject *self, PyObject *args)
-{
-       PyObject *str_obj;
-       if (!PyArg_ParseTuple(args, "O!:asciiupper", &PyBytes_Type, &str_obj))
-               return NULL;
-       return _asciitransform(str_obj, uppertable, NULL);
-}
+/* defined in charencode.c */
+PyObject *unhexlify(const char *str, int len);
+PyObject *asciilower(PyObject *self, PyObject *args);
+PyObject *asciiupper(PyObject *self, PyObject *args);
+PyObject *make_file_foldmap(PyObject *self, PyObject *args);
 
 static PyObject *dict_new_presized(PyObject *self, PyObject *args)
 {
@@ -165,77 +45,6 @@ static PyObject *dict_new_presized(PyObj
        return _dict_new_presized(expected_size);
 }
 
-static PyObject *make_file_foldmap(PyObject *self, PyObject *args)
-{
-       PyObject *dmap, *spec_obj, *normcase_fallback;
-       PyObject *file_foldmap = NULL;
-       enum normcase_spec spec;
-       PyObject *k, *v;
-       dirstateTupleObject *tuple;
-       Py_ssize_t pos = 0;
-       const char *table;
-
-       if (!PyArg_ParseTuple(args, "O!O!O!:make_file_foldmap",
-                             &PyDict_Type, &dmap,
-                             &PyInt_Type, &spec_obj,
-                             &PyFunction_Type, &normcase_fallback))
-               goto quit;
-
-       spec = (int)PyInt_AS_LONG(spec_obj);
-       switch (spec) {
-       case NORMCASE_LOWER:
-               table = lowertable;
-               break;
-       case NORMCASE_UPPER:
-               table = uppertable;
-               break;
-       case NORMCASE_OTHER:
-               table = NULL;
-               break;
-       default:
-               PyErr_SetString(PyExc_TypeError, "invalid normcasespec");
-               goto quit;
-       }
-
-       /* Add some more entries to deal with additions outside this
-          function. */
-       file_foldmap = _dict_new_presized((PyDict_Size(dmap) / 10) * 11);
-       if (file_foldmap == NULL)
-               goto quit;
-
-       while (PyDict_Next(dmap, &pos, &k, &v)) {
-               if (!dirstate_tuple_check(v)) {
-                       PyErr_SetString(PyExc_TypeError,
-                                       "expected a dirstate tuple");
-                       goto quit;
-               }
-
-               tuple = (dirstateTupleObject *)v;
-               if (tuple->state != 'r') {
-                       PyObject *normed;
-                       if (table != NULL) {
-                               normed = _asciitransform(k, table,
-                                       normcase_fallback);
-                       } else {
-                               normed = PyObject_CallFunctionObjArgs(
-                                       normcase_fallback, k, NULL);
-                       }
-
-                       if (normed == NULL)
-                               goto quit;
-                       if (PyDict_SetItem(file_foldmap, normed, k) == -1) {
-                               Py_DECREF(normed);
-                               goto quit;
-                       }
-                       Py_DECREF(normed);
-               }
-       }
-       return file_foldmap;
-quit:
-       Py_XDECREF(file_foldmap);
-       return NULL;
-}
-
 /*
  * This code assumes that a manifest is stitched together with newline
  * ('\n') characters.
diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -760,7 +760,8 @@ extmodules = [
                                         'mercurial/cext/mpatch.c'],
               include_dirs=common_include_dirs,
               depends=common_depends),
-    Extension('mercurial.cext.parsers', ['mercurial/cext/dirs.c',
+    Extension('mercurial.cext.parsers', ['mercurial/cext/charencode.c',
+                                         'mercurial/cext/dirs.c',
                                          'mercurial/cext/manifest.c',
                                          'mercurial/cext/parsers.c',
                                          'mercurial/cext/pathencode.c',
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