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cpython/Modules/cjkcodecs/multibytecodec.c

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/*
* multibytecodec.c: Common Multibyte Codec Implementation
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
*/
#ifndef Py_BUILD_CORE_BUILTIN
# define Py_BUILD_CORE_MODULE 1
#endif
#include "Python.h"
#include "pycore_long.h" // _PyLong_FromByteArray()
#include "multibytecodec.h"
#include "clinic/multibytecodec.c.h"
#include <stddef.h> // offsetof()
#define MODULE_NAME "_multibytecodec"
typedef struct {
PyTypeObject *encoder_type;
PyTypeObject *decoder_type;
PyTypeObject *reader_type;
PyTypeObject *writer_type;
PyTypeObject *multibytecodec_type;
PyObject *str_write;
} module_state;
static module_state *
get_module_state(PyObject *module)
{
module_state *state = PyModule_GetState(module);
assert(state != NULL);
return state;
}
static struct PyModuleDef _multibytecodecmodule;
static module_state *
find_state_by_def(PyTypeObject *type)
{
PyObject *module = PyType_GetModuleByDef(type, &_multibytecodecmodule);
assert(module != NULL);
return get_module_state(module);
}
#define clinic_get_state() find_state_by_def(type)
/*[clinic input]
module _multibytecodec
class _multibytecodec.MultibyteCodec "MultibyteCodecObject *" "clinic_get_state()->multibytecodec_type"
class _multibytecodec.MultibyteIncrementalEncoder "MultibyteIncrementalEncoderObject *" "clinic_get_state()->encoder_type"
class _multibytecodec.MultibyteIncrementalDecoder "MultibyteIncrementalDecoderObject *" "clinic_get_state()->decoder_type"
class _multibytecodec.MultibyteStreamReader "MultibyteStreamReaderObject *" "clinic_get_state()->reader_type"
class _multibytecodec.MultibyteStreamWriter "MultibyteStreamWriterObject *" "clinic_get_state()->writer_type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=305a76dfdd24b99c]*/
#undef clinic_get_state
typedef struct {
PyObject *inobj;
Py_ssize_t inpos, inlen;
unsigned char *outbuf, *outbuf_end;
PyObject *excobj, *outobj;
} MultibyteEncodeBuffer;
typedef struct {
const unsigned char *inbuf, *inbuf_top, *inbuf_end;
PyObject *excobj;
_PyUnicodeWriter writer;
} MultibyteDecodeBuffer;
static char *incnewkwarglist[] = {"errors", NULL};
static char *streamkwarglist[] = {"stream", "errors", NULL};
static PyObject *multibytecodec_encode(const MultibyteCodec *,
MultibyteCodec_State *, PyObject *, Py_ssize_t *,
PyObject *, int);
#define MBENC_RESET MBENC_MAX<<1 /* reset after an encoding session */
static PyObject *
make_tuple(PyObject *object, Py_ssize_t len)
{
PyObject *v, *w;
if (object == NULL)
return NULL;
v = PyTuple_New(2);
if (v == NULL) {
Py_DECREF(object);
return NULL;
}
PyTuple_SET_ITEM(v, 0, object);
w = PyLong_FromSsize_t(len);
if (w == NULL) {
Py_DECREF(v);
return NULL;
}
PyTuple_SET_ITEM(v, 1, w);
return v;
}
static PyObject *
internal_error_callback(const char *errors)
{
if (errors == NULL || strcmp(errors, "strict") == 0)
return ERROR_STRICT;
else if (strcmp(errors, "ignore") == 0)
return ERROR_IGNORE;
else if (strcmp(errors, "replace") == 0)
return ERROR_REPLACE;
else
return PyUnicode_FromString(errors);
}
static PyObject *
call_error_callback(PyObject *errors, PyObject *exc)
{
PyObject *cb, *r;
const char *str;
assert(PyUnicode_Check(errors));
str = PyUnicode_AsUTF8(errors);
if (str == NULL)
return NULL;
cb = PyCodec_LookupError(str);
if (cb == NULL)
return NULL;
r = PyObject_CallOneArg(cb, exc);
Py_DECREF(cb);
return r;
}
static PyObject *
codecctx_errors_get(MultibyteStatefulCodecContext *self, void *Py_UNUSED(ignored))
{
const char *errors;
if (self->errors == ERROR_STRICT)
errors = "strict";
else if (self->errors == ERROR_IGNORE)
errors = "ignore";
else if (self->errors == ERROR_REPLACE)
errors = "replace";
else {
return Py_NewRef(self->errors);
}
return PyUnicode_FromString(errors);
}
static int
codecctx_errors_set(MultibyteStatefulCodecContext *self, PyObject *value,
void *closure)
{
PyObject *cb;
const char *str;
if (value == NULL) {
PyErr_SetString(PyExc_AttributeError, "cannot delete attribute");
return -1;
}
if (!PyUnicode_Check(value)) {
PyErr_SetString(PyExc_TypeError, "errors must be a string");
return -1;
}
str = PyUnicode_AsUTF8(value);
if (str == NULL)
return -1;
cb = internal_error_callback(str);
if (cb == NULL)
return -1;
ERROR_DECREF(self->errors);
self->errors = cb;
return 0;
}
/* This getset handlers list is used by all the stateful codec objects */
static PyGetSetDef codecctx_getsets[] = {
{"errors", (getter)codecctx_errors_get,
(setter)codecctx_errors_set,
PyDoc_STR("how to treat errors")},
{NULL,}
};
static int
expand_encodebuffer(MultibyteEncodeBuffer *buf, Py_ssize_t esize)
{
Py_ssize_t orgpos, orgsize, incsize;
orgpos = (Py_ssize_t)((char *)buf->outbuf -
PyBytes_AS_STRING(buf->outobj));
orgsize = PyBytes_GET_SIZE(buf->outobj);
incsize = (esize < (orgsize >> 1) ? (orgsize >> 1) | 1 : esize);
if (orgsize > PY_SSIZE_T_MAX - incsize) {
PyErr_NoMemory();
return -1;
}
if (_PyBytes_Resize(&buf->outobj, orgsize + incsize) == -1)
return -1;
buf->outbuf = (unsigned char *)PyBytes_AS_STRING(buf->outobj) +orgpos;
buf->outbuf_end = (unsigned char *)PyBytes_AS_STRING(buf->outobj)
+ PyBytes_GET_SIZE(buf->outobj);
return 0;
}
#define REQUIRE_ENCODEBUFFER(buf, s) do { \
if ((s) < 0 || (s) > (buf)->outbuf_end - (buf)->outbuf) \
if (expand_encodebuffer(buf, s) == -1) \
goto errorexit; \
} while(0)
/**
* MultibyteCodec object
*/
static int
multibytecodec_encerror(const MultibyteCodec *codec,
MultibyteCodec_State *state,
MultibyteEncodeBuffer *buf,
PyObject *errors, Py_ssize_t e)
{
PyObject *retobj = NULL, *retstr = NULL, *tobj;
Py_ssize_t retstrsize, newpos;
Py_ssize_t esize, start, end;
const char *reason;
if (e > 0) {
reason = "illegal multibyte sequence";
esize = e;
}
else {
switch (e) {
case MBERR_TOOSMALL:
REQUIRE_ENCODEBUFFER(buf, -1);
return 0; /* retry it */
case MBERR_TOOFEW:
reason = "incomplete multibyte sequence";
esize = (Py_ssize_t)buf->inpos;
break;
case MBERR_INTERNAL:
PyErr_SetString(PyExc_RuntimeError,
"internal codec error");
return -1;
default:
PyErr_SetString(PyExc_RuntimeError,
"unknown runtime error");
return -1;
}
}
if (errors == ERROR_REPLACE) {
PyObject *replchar;
Py_ssize_t r;
Py_ssize_t inpos;
int kind;
const void *data;
replchar = PyUnicode_FromOrdinal('?');
if (replchar == NULL)
goto errorexit;
kind = PyUnicode_KIND(replchar);
data = PyUnicode_DATA(replchar);
inpos = 0;
for (;;) {
Py_ssize_t outleft = (Py_ssize_t)(buf->outbuf_end - buf->outbuf);
r = codec->encode(state, codec,
kind, data, &inpos, 1,
&buf->outbuf, outleft, 0);
if (r == MBERR_TOOSMALL) {
REQUIRE_ENCODEBUFFER(buf, -1);
continue;
}
else
break;
}
Py_DECREF(replchar);
if (r != 0) {
REQUIRE_ENCODEBUFFER(buf, 1);
*buf->outbuf++ = '?';
}
}
if (errors == ERROR_IGNORE || errors == ERROR_REPLACE) {
buf->inpos += esize;
return 0;
}
start = (Py_ssize_t)buf->inpos;
end = start + esize;
/* use cached exception object if available */
if (buf->excobj == NULL) {
buf->excobj = PyObject_CallFunction(PyExc_UnicodeEncodeError,
"sOnns",
codec->encoding, buf->inobj,
start, end, reason);
if (buf->excobj == NULL)
goto errorexit;
}
else
if (PyUnicodeEncodeError_SetStart(buf->excobj, start) != 0 ||
PyUnicodeEncodeError_SetEnd(buf->excobj, end) != 0 ||
PyUnicodeEncodeError_SetReason(buf->excobj, reason) != 0)
goto errorexit;
if (errors == ERROR_STRICT) {
PyCodec_StrictErrors(buf->excobj);
goto errorexit;
}
retobj = call_error_callback(errors, buf->excobj);
if (retobj == NULL)
goto errorexit;
if (!PyTuple_Check(retobj) || PyTuple_GET_SIZE(retobj) != 2 ||
(!PyUnicode_Check((tobj = PyTuple_GET_ITEM(retobj, 0))) && !PyBytes_Check(tobj)) ||
!PyLong_Check(PyTuple_GET_ITEM(retobj, 1))) {
PyErr_SetString(PyExc_TypeError,
"encoding error handler must return "
"(str, int) tuple");
goto errorexit;
}
if (PyUnicode_Check(tobj)) {
Py_ssize_t inpos;
retstr = multibytecodec_encode(codec, state, tobj,
&inpos, ERROR_STRICT,
MBENC_FLUSH);
if (retstr == NULL)
goto errorexit;
}
else {
retstr = Py_NewRef(tobj);
}
assert(PyBytes_Check(retstr));
retstrsize = PyBytes_GET_SIZE(retstr);
if (retstrsize > 0) {
REQUIRE_ENCODEBUFFER(buf, retstrsize);
memcpy(buf->outbuf, PyBytes_AS_STRING(retstr), retstrsize);
buf->outbuf += retstrsize;
}
newpos = PyLong_AsSsize_t(PyTuple_GET_ITEM(retobj, 1));
if (newpos < 0 && !PyErr_Occurred())
newpos += (Py_ssize_t)buf->inlen;
if (newpos < 0 || newpos > buf->inlen) {
PyErr_Clear();
PyErr_Format(PyExc_IndexError,
"position %zd from error handler out of bounds",
newpos);
goto errorexit;
}
buf->inpos = newpos;
Py_DECREF(retobj);
Py_DECREF(retstr);
return 0;
errorexit:
Py_XDECREF(retobj);
Py_XDECREF(retstr);
return -1;
}
static int
multibytecodec_decerror(const MultibyteCodec *codec,
MultibyteCodec_State *state,
MultibyteDecodeBuffer *buf,
PyObject *errors, Py_ssize_t e)
{
PyObject *retobj = NULL, *retuni = NULL;
Py_ssize_t newpos;
const char *reason;
Py_ssize_t esize, start, end;
if (e > 0) {
reason = "illegal multibyte sequence";
esize = e;
}
else {
switch (e) {
case MBERR_TOOSMALL:
return 0; /* retry it */
case MBERR_TOOFEW:
reason = "incomplete multibyte sequence";
esize = (Py_ssize_t)(buf->inbuf_end - buf->inbuf);
break;
case MBERR_INTERNAL:
PyErr_SetString(PyExc_RuntimeError,
"internal codec error");
return -1;
case MBERR_EXCEPTION:
return -1;
default:
PyErr_SetString(PyExc_RuntimeError,
"unknown runtime error");
return -1;
}
}
if (errors == ERROR_REPLACE) {
if (_PyUnicodeWriter_WriteChar(&buf->writer,
Py_UNICODE_REPLACEMENT_CHARACTER) < 0)
goto errorexit;
}
if (errors == ERROR_IGNORE || errors == ERROR_REPLACE) {
buf->inbuf += esize;
return 0;
}
start = (Py_ssize_t)(buf->inbuf - buf->inbuf_top);
end = start + esize;
/* use cached exception object if available */
if (buf->excobj == NULL) {
buf->excobj = PyUnicodeDecodeError_Create(codec->encoding,
(const char *)buf->inbuf_top,
(Py_ssize_t)(buf->inbuf_end - buf->inbuf_top),
start, end, reason);
if (buf->excobj == NULL)
goto errorexit;
}
else
if (PyUnicodeDecodeError_SetStart(buf->excobj, start) ||
PyUnicodeDecodeError_SetEnd(buf->excobj, end) ||
PyUnicodeDecodeError_SetReason(buf->excobj, reason))
goto errorexit;
if (errors == ERROR_STRICT) {
PyCodec_StrictErrors(buf->excobj);
goto errorexit;
}
retobj = call_error_callback(errors, buf->excobj);
if (retobj == NULL)
goto errorexit;
if (!PyTuple_Check(retobj) || PyTuple_GET_SIZE(retobj) != 2 ||
!PyUnicode_Check((retuni = PyTuple_GET_ITEM(retobj, 0))) ||
!PyLong_Check(PyTuple_GET_ITEM(retobj, 1))) {
PyErr_SetString(PyExc_TypeError,
"decoding error handler must return "
"(str, int) tuple");
goto errorexit;
}
if (_PyUnicodeWriter_WriteStr(&buf->writer, retuni) < 0)
goto errorexit;
newpos = PyLong_AsSsize_t(PyTuple_GET_ITEM(retobj, 1));
if (newpos < 0 && !PyErr_Occurred())
newpos += (Py_ssize_t)(buf->inbuf_end - buf->inbuf_top);
if (newpos < 0 || buf->inbuf_top + newpos > buf->inbuf_end) {
PyErr_Clear();
PyErr_Format(PyExc_IndexError,
"position %zd from error handler out of bounds",
newpos);
goto errorexit;
}
buf->inbuf = buf->inbuf_top + newpos;
Py_DECREF(retobj);
return 0;
errorexit:
Py_XDECREF(retobj);
return -1;
}
static PyObject *
multibytecodec_encode(const MultibyteCodec *codec,
MultibyteCodec_State *state,
PyObject *text, Py_ssize_t *inpos_t,
PyObject *errors, int flags)
{
MultibyteEncodeBuffer buf;
Py_ssize_t finalsize, r = 0;
Py_ssize_t datalen;
int kind;
const void *data;
datalen = PyUnicode_GET_LENGTH(text);
if (datalen == 0 && !(flags & MBENC_RESET))
return PyBytes_FromStringAndSize(NULL, 0);
buf.excobj = NULL;
buf.outobj = NULL;
buf.inobj = text; /* borrowed reference */
buf.inpos = 0;
buf.inlen = datalen;
kind = PyUnicode_KIND(buf.inobj);
data = PyUnicode_DATA(buf.inobj);
if (datalen > (PY_SSIZE_T_MAX - 16) / 2) {
PyErr_NoMemory();
goto errorexit;
}
buf.outobj = PyBytes_FromStringAndSize(NULL, datalen * 2 + 16);
if (buf.outobj == NULL)
goto errorexit;
buf.outbuf = (unsigned char *)PyBytes_AS_STRING(buf.outobj);
buf.outbuf_end = buf.outbuf + PyBytes_GET_SIZE(buf.outobj);
while (buf.inpos < buf.inlen) {
/* we don't reuse inleft and outleft here.
* error callbacks can relocate the cursor anywhere on buffer*/
Py_ssize_t outleft = (Py_ssize_t)(buf.outbuf_end - buf.outbuf);
r = codec->encode(state, codec,
kind, data,
&buf.inpos, buf.inlen,
&buf.outbuf, outleft, flags);
if ((r == 0) || (r == MBERR_TOOFEW && !(flags & MBENC_FLUSH)))
break;
else if (multibytecodec_encerror(codec, state, &buf, errors,r))
goto errorexit;
else if (r == MBERR_TOOFEW)
break;
}
if (codec->encreset != NULL && (flags & MBENC_RESET))
for (;;) {
Py_ssize_t outleft;
outleft = (Py_ssize_t)(buf.outbuf_end - buf.outbuf);
r = codec->encreset(state, codec, &buf.outbuf,
outleft);
if (r == 0)
break;
else if (multibytecodec_encerror(codec, state,
&buf, errors, r))
goto errorexit;
}
finalsize = (Py_ssize_t)((char *)buf.outbuf -
PyBytes_AS_STRING(buf.outobj));
if (finalsize != PyBytes_GET_SIZE(buf.outobj))
if (_PyBytes_Resize(&buf.outobj, finalsize) == -1)
goto errorexit;
if (inpos_t)
*inpos_t = buf.inpos;
Py_XDECREF(buf.excobj);
return buf.outobj;
errorexit:
Py_XDECREF(buf.excobj);
Py_XDECREF(buf.outobj);
return NULL;
}
/*[clinic input]
_multibytecodec.MultibyteCodec.encode
input: object
errors: str(accept={str, NoneType}) = None
Return an encoded string version of `input'.
'errors' may be given to set a different error handling scheme. Default is
'strict' meaning that encoding errors raise a UnicodeEncodeError. Other possible
values are 'ignore', 'replace' and 'xmlcharrefreplace' as well as any other name
registered with codecs.register_error that can handle UnicodeEncodeErrors.
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteCodec_encode_impl(MultibyteCodecObject *self,
PyObject *input,
const char *errors)
/*[clinic end generated code: output=7b26652045ba56a9 input=606d0e128a577bae]*/
{
MultibyteCodec_State state;
PyObject *errorcb, *r, *ucvt;
Py_ssize_t datalen;
if (PyUnicode_Check(input))
ucvt = NULL;
else {
input = ucvt = PyObject_Str(input);
if (input == NULL)
return NULL;
else if (!PyUnicode_Check(input)) {
PyErr_SetString(PyExc_TypeError,
"couldn't convert the object to unicode.");
Py_DECREF(ucvt);
return NULL;
}
}
datalen = PyUnicode_GET_LENGTH(input);
errorcb = internal_error_callback(errors);
if (errorcb == NULL) {
Py_XDECREF(ucvt);
return NULL;
}
if (self->codec->encinit != NULL &&
self->codec->encinit(&state, self->codec) != 0)
goto errorexit;
r = multibytecodec_encode(self->codec, &state,
input, NULL, errorcb,
MBENC_FLUSH | MBENC_RESET);
if (r == NULL)
goto errorexit;
ERROR_DECREF(errorcb);
Py_XDECREF(ucvt);
return make_tuple(r, datalen);
errorexit:
ERROR_DECREF(errorcb);
Py_XDECREF(ucvt);
return NULL;
}
/*[clinic input]
_multibytecodec.MultibyteCodec.decode
input: Py_buffer
errors: str(accept={str, NoneType}) = None
Decodes 'input'.
'errors' may be given to set a different error handling scheme. Default is
'strict' meaning that encoding errors raise a UnicodeDecodeError. Other possible
values are 'ignore' and 'replace' as well as any other name registered with
codecs.register_error that is able to handle UnicodeDecodeErrors."
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteCodec_decode_impl(MultibyteCodecObject *self,
Py_buffer *input,
const char *errors)
/*[clinic end generated code: output=ff419f65bad6cc77 input=e0c78fc7ab190def]*/
{
MultibyteCodec_State state;
MultibyteDecodeBuffer buf;
PyObject *errorcb, *res;
const char *data;
Py_ssize_t datalen;
data = input->buf;
datalen = input->len;
errorcb = internal_error_callback(errors);
if (errorcb == NULL) {
return NULL;
}
if (datalen == 0) {
ERROR_DECREF(errorcb);
return make_tuple(PyUnicode_New(0, 0), 0);
}
_PyUnicodeWriter_Init(&buf.writer);
buf.writer.min_length = datalen;
buf.excobj = NULL;
buf.inbuf = buf.inbuf_top = (unsigned char *)data;
buf.inbuf_end = buf.inbuf_top + datalen;
if (self->codec->decinit != NULL &&
self->codec->decinit(&state, self->codec) != 0)
goto errorexit;
while (buf.inbuf < buf.inbuf_end) {
Py_ssize_t inleft, r;
inleft = (Py_ssize_t)(buf.inbuf_end - buf.inbuf);
r = self->codec->decode(&state, self->codec,
&buf.inbuf, inleft, &buf.writer);
if (r == 0)
break;
else if (multibytecodec_decerror(self->codec, &state,
&buf, errorcb, r))
goto errorexit;
}
res = _PyUnicodeWriter_Finish(&buf.writer);
if (res == NULL)
goto errorexit;
Py_XDECREF(buf.excobj);
ERROR_DECREF(errorcb);
return make_tuple(res, datalen);
errorexit:
ERROR_DECREF(errorcb);
Py_XDECREF(buf.excobj);
_PyUnicodeWriter_Dealloc(&buf.writer);
return NULL;
}
static struct PyMethodDef multibytecodec_methods[] = {
_MULTIBYTECODEC_MULTIBYTECODEC_ENCODE_METHODDEF
_MULTIBYTECODEC_MULTIBYTECODEC_DECODE_METHODDEF
{NULL, NULL},
};
static int
multibytecodec_clear(MultibyteCodecObject *self)
{
Py_CLEAR(self->cjk_module);
return 0;
}
static int
multibytecodec_traverse(MultibyteCodecObject *self, visitproc visit, void *arg)
{
Py_VISIT(Py_TYPE(self));
Py_VISIT(self->cjk_module);
return 0;
}
static void
multibytecodec_dealloc(MultibyteCodecObject *self)
{
PyObject_GC_UnTrack(self);
PyTypeObject *tp = Py_TYPE(self);
(void)multibytecodec_clear(self);
tp->tp_free(self);
Py_DECREF(tp);
}
static PyType_Slot multibytecodec_slots[] = {
{Py_tp_dealloc, multibytecodec_dealloc},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_methods, multibytecodec_methods},
{Py_tp_traverse, multibytecodec_traverse},
{Py_tp_clear, multibytecodec_clear},
{0, NULL},
};
static PyType_Spec multibytecodec_spec = {
.name = MODULE_NAME ".MultibyteCodec",
.basicsize = sizeof(MultibyteCodecObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC |
Py_TPFLAGS_DISALLOW_INSTANTIATION | Py_TPFLAGS_IMMUTABLETYPE),
.slots = multibytecodec_slots,
};
/**
* Utility functions for stateful codec mechanism
*/
#define STATEFUL_DCTX(o) ((MultibyteStatefulDecoderContext *)(o))
#define STATEFUL_ECTX(o) ((MultibyteStatefulEncoderContext *)(o))
static PyObject *
encoder_encode_stateful(MultibyteStatefulEncoderContext *ctx,
PyObject *unistr, int final)
{
PyObject *ucvt, *r = NULL;
PyObject *inbuf = NULL;
Py_ssize_t inpos, datalen;
PyObject *origpending = NULL;
if (PyUnicode_Check(unistr))
ucvt = NULL;
else {
unistr = ucvt = PyObject_Str(unistr);
if (unistr == NULL)
return NULL;
else if (!PyUnicode_Check(unistr)) {
PyErr_SetString(PyExc_TypeError,
"couldn't convert the object to str.");
Py_DECREF(ucvt);
return NULL;
}
}
if (ctx->pending) {
PyObject *inbuf_tmp;
origpending = Py_NewRef(ctx->pending);
inbuf_tmp = Py_NewRef(ctx->pending);
PyUnicode_Append(&inbuf_tmp, unistr);
if (inbuf_tmp == NULL)
goto errorexit;
Py_CLEAR(ctx->pending);
inbuf = inbuf_tmp;
}
else {
origpending = NULL;
inbuf = Py_NewRef(unistr);
}
inpos = 0;
datalen = PyUnicode_GET_LENGTH(inbuf);
r = multibytecodec_encode(ctx->codec, &ctx->state,
inbuf, &inpos,
ctx->errors, final ? MBENC_FLUSH | MBENC_RESET : 0);
if (r == NULL) {
/* recover the original pending buffer */
Py_XSETREF(ctx->pending, origpending);
origpending = NULL;
goto errorexit;
}
Py_XDECREF(origpending);
if (inpos < datalen) {
if (datalen - inpos > MAXENCPENDING) {
/* normal codecs can't reach here */
PyErr_SetString(PyExc_UnicodeError,
"pending buffer overflow");
goto errorexit;
}
ctx->pending = PyUnicode_Substring(inbuf, inpos, datalen);
if (ctx->pending == NULL) {
/* normal codecs can't reach here */
goto errorexit;
}
}
Py_DECREF(inbuf);
Py_XDECREF(ucvt);
return r;
errorexit:
Py_XDECREF(r);
Py_XDECREF(ucvt);
Py_XDECREF(origpending);
Py_XDECREF(inbuf);
return NULL;
}
static int
decoder_append_pending(MultibyteStatefulDecoderContext *ctx,
MultibyteDecodeBuffer *buf)
{
Py_ssize_t npendings;
npendings = (Py_ssize_t)(buf->inbuf_end - buf->inbuf);
if (npendings + ctx->pendingsize > MAXDECPENDING ||
npendings > PY_SSIZE_T_MAX - ctx->pendingsize) {
PyErr_SetString(PyExc_UnicodeError, "pending buffer overflow");
return -1;
}
memcpy(ctx->pending + ctx->pendingsize, buf->inbuf, npendings);
ctx->pendingsize += npendings;
return 0;
}
static int
decoder_prepare_buffer(MultibyteDecodeBuffer *buf, const char *data,
Py_ssize_t size)
{
buf->inbuf = buf->inbuf_top = (const unsigned char *)data;
buf->inbuf_end = buf->inbuf_top + size;
buf->writer.min_length += size;
return 0;
}
static int
decoder_feed_buffer(MultibyteStatefulDecoderContext *ctx,
MultibyteDecodeBuffer *buf)
{
while (buf->inbuf < buf->inbuf_end) {
Py_ssize_t inleft;
Py_ssize_t r;
inleft = (Py_ssize_t)(buf->inbuf_end - buf->inbuf);
r = ctx->codec->decode(&ctx->state, ctx->codec,
&buf->inbuf, inleft, &buf->writer);
if (r == 0 || r == MBERR_TOOFEW)
break;
else if (multibytecodec_decerror(ctx->codec, &ctx->state,
buf, ctx->errors, r))
return -1;
}
return 0;
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalEncoder.encode
input: object
final: bool = False
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalEncoder_encode_impl(MultibyteIncrementalEncoderObject *self,
PyObject *input,
int final)
/*[clinic end generated code: output=123361b6c505e2c1 input=bd5f7d40d43e99b0]*/
{
return encoder_encode_stateful(STATEFUL_ECTX(self), input, final);
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalEncoder.getstate
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalEncoder_getstate_impl(MultibyteIncrementalEncoderObject *self)
/*[clinic end generated code: output=9794a5ace70d7048 input=4a2a82874ffa40bb]*/
{
/* state made up of 1 byte for buffer size, up to MAXENCPENDING*4 bytes
for UTF-8 encoded buffer (each character can use up to 4
bytes), and required bytes for MultibyteCodec_State.c. A byte
array is used to avoid different compilers generating different
values for the same state, e.g. as a result of struct padding.
*/
unsigned char statebytes[1 + MAXENCPENDING*4 + sizeof(self->state.c)];
Py_ssize_t statesize;
const char *pendingbuffer = NULL;
Py_ssize_t pendingsize;
if (self->pending != NULL) {
pendingbuffer = PyUnicode_AsUTF8AndSize(self->pending, &pendingsize);
if (pendingbuffer == NULL) {
return NULL;
}
if (pendingsize > MAXENCPENDING*4) {
PyErr_SetString(PyExc_UnicodeError, "pending buffer too large");
return NULL;
}
statebytes[0] = (unsigned char)pendingsize;
memcpy(statebytes + 1, pendingbuffer, pendingsize);
statesize = 1 + pendingsize;
} else {
statebytes[0] = 0;
statesize = 1;
}
memcpy(statebytes+statesize, self->state.c,
sizeof(self->state.c));
statesize += sizeof(self->state.c);
return (PyObject *)_PyLong_FromByteArray(statebytes, statesize,
1 /* little-endian */ ,
0 /* unsigned */ );
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalEncoder.setstate
state as statelong: object(type='PyLongObject *', subclass_of='&PyLong_Type')
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalEncoder_setstate_impl(MultibyteIncrementalEncoderObject *self,
PyLongObject *statelong)
/*[clinic end generated code: output=4e5e98ac1f4039ca input=c80fb5830d4d2f76]*/
{
PyObject *pending = NULL;
unsigned char statebytes[1 + MAXENCPENDING*4 + sizeof(self->state.c)];
if (_PyLong_AsByteArray(statelong, statebytes, sizeof(statebytes),
1 /* little-endian */ ,
0 /* unsigned */ ) < 0) {
goto errorexit;
}
if (statebytes[0] > MAXENCPENDING*4) {
PyErr_SetString(PyExc_UnicodeError, "pending buffer too large");
return NULL;
}
pending = PyUnicode_DecodeUTF8((const char *)statebytes+1,
statebytes[0], "strict");
if (pending == NULL) {
goto errorexit;
}
Py_XSETREF(self->pending, pending);
memcpy(self->state.c, statebytes+1+statebytes[0],
sizeof(self->state.c));
Py_RETURN_NONE;
errorexit:
Py_XDECREF(pending);
return NULL;
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalEncoder.reset
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalEncoder_reset_impl(MultibyteIncrementalEncoderObject *self)
/*[clinic end generated code: output=b4125d8f537a253f input=930f06760707b6ea]*/
{
/* Longest output: 4 bytes (b'\x0F\x1F(B') with ISO 2022 */
unsigned char buffer[4], *outbuf;
Py_ssize_t r;
if (self->codec->encreset != NULL) {
outbuf = buffer;
r = self->codec->encreset(&self->state, self->codec,
&outbuf, sizeof(buffer));
if (r != 0)
return NULL;
}
Py_CLEAR(self->pending);
Py_RETURN_NONE;
}
static struct PyMethodDef mbiencoder_methods[] = {
_MULTIBYTECODEC_MULTIBYTEINCREMENTALENCODER_ENCODE_METHODDEF
_MULTIBYTECODEC_MULTIBYTEINCREMENTALENCODER_GETSTATE_METHODDEF
_MULTIBYTECODEC_MULTIBYTEINCREMENTALENCODER_SETSTATE_METHODDEF
_MULTIBYTECODEC_MULTIBYTEINCREMENTALENCODER_RESET_METHODDEF
{NULL, NULL},
};
static PyObject *
mbiencoder_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
MultibyteIncrementalEncoderObject *self;
PyObject *codec = NULL;
char *errors = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|s:IncrementalEncoder",
incnewkwarglist, &errors))
return NULL;
self = (MultibyteIncrementalEncoderObject *)type->tp_alloc(type, 0);
if (self == NULL)
return NULL;
codec = PyObject_GetAttrString((PyObject *)type, "codec");
if (codec == NULL)
goto errorexit;
module_state *state = find_state_by_def(type);
if (!MultibyteCodec_Check(state, codec)) {
PyErr_SetString(PyExc_TypeError, "codec is unexpected type");
goto errorexit;
}
self->codec = ((MultibyteCodecObject *)codec)->codec;
self->pending = NULL;
self->errors = internal_error_callback(errors);
if (self->errors == NULL)
goto errorexit;
if (self->codec->encinit != NULL &&
self->codec->encinit(&self->state, self->codec) != 0)
goto errorexit;
Py_DECREF(codec);
return (PyObject *)self;
errorexit:
Py_XDECREF(self);
Py_XDECREF(codec);
return NULL;
}
static int
mbiencoder_init(PyObject *self, PyObject *args, PyObject *kwds)
{
return 0;
}
static int
mbiencoder_traverse(MultibyteIncrementalEncoderObject *self,
visitproc visit, void *arg)
{
if (ERROR_ISCUSTOM(self->errors))
Py_VISIT(self->errors);
return 0;
}
static void
mbiencoder_dealloc(MultibyteIncrementalEncoderObject *self)
{
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
ERROR_DECREF(self->errors);
Py_CLEAR(self->pending);
tp->tp_free(self);
Py_DECREF(tp);
}
static PyType_Slot encoder_slots[] = {
{Py_tp_dealloc, mbiencoder_dealloc},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_traverse, mbiencoder_traverse},
{Py_tp_methods, mbiencoder_methods},
{Py_tp_getset, codecctx_getsets},
{Py_tp_init, mbiencoder_init},
{Py_tp_new, mbiencoder_new},
{0, NULL},
};
static PyType_Spec encoder_spec = {
.name = MODULE_NAME ".MultibyteIncrementalEncoder",
.basicsize = sizeof(MultibyteIncrementalEncoderObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = encoder_slots,
};
/*[clinic input]
_multibytecodec.MultibyteIncrementalDecoder.decode
input: Py_buffer
final: bool = False
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalDecoder_decode_impl(MultibyteIncrementalDecoderObject *self,
Py_buffer *input,
int final)
/*[clinic end generated code: output=b9b9090e8a9ce2ba input=8795fbb20860027a]*/
{
MultibyteDecodeBuffer buf;
char *data, *wdata = NULL;
Py_ssize_t wsize, size, origpending;
PyObject *res;
data = input->buf;
size = input->len;
_PyUnicodeWriter_Init(&buf.writer);
buf.excobj = NULL;
origpending = self->pendingsize;
if (self->pendingsize == 0) {
wsize = size;
wdata = data;
}
else {
if (size > PY_SSIZE_T_MAX - self->pendingsize) {
PyErr_NoMemory();
goto errorexit;
}
wsize = size + self->pendingsize;
wdata = PyMem_Malloc(wsize);
if (wdata == NULL) {
PyErr_NoMemory();
goto errorexit;
}
memcpy(wdata, self->pending, self->pendingsize);
memcpy(wdata + self->pendingsize, data, size);
self->pendingsize = 0;
}
if (decoder_prepare_buffer(&buf, wdata, wsize) != 0)
goto errorexit;
if (decoder_feed_buffer(STATEFUL_DCTX(self), &buf))
goto errorexit;
if (final && buf.inbuf < buf.inbuf_end) {
if (multibytecodec_decerror(self->codec, &self->state,
&buf, self->errors, MBERR_TOOFEW)) {
/* recover the original pending buffer */
memcpy(self->pending, wdata, origpending);
self->pendingsize = origpending;
goto errorexit;
}
}
if (buf.inbuf < buf.inbuf_end) { /* pending sequence still exists */
if (decoder_append_pending(STATEFUL_DCTX(self), &buf) != 0)
goto errorexit;
}
res = _PyUnicodeWriter_Finish(&buf.writer);
if (res == NULL)
goto errorexit;
if (wdata != data)
PyMem_Free(wdata);
Py_XDECREF(buf.excobj);
return res;
errorexit:
if (wdata != NULL && wdata != data)
PyMem_Free(wdata);
Py_XDECREF(buf.excobj);
_PyUnicodeWriter_Dealloc(&buf.writer);
return NULL;
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalDecoder.getstate
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalDecoder_getstate_impl(MultibyteIncrementalDecoderObject *self)
/*[clinic end generated code: output=255009c4713b7f82 input=4006aa49bddbaa75]*/
{
PyObject *buffer;
PyObject *statelong;
buffer = PyBytes_FromStringAndSize((const char *)self->pending,
self->pendingsize);
if (buffer == NULL) {
return NULL;
}
statelong = (PyObject *)_PyLong_FromByteArray(self->state.c,
sizeof(self->state.c),
1 /* little-endian */ ,
0 /* unsigned */ );
if (statelong == NULL) {
Py_DECREF(buffer);
return NULL;
}
return Py_BuildValue("NN", buffer, statelong);
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalDecoder.setstate
state: object(subclass_of='&PyTuple_Type')
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalDecoder_setstate_impl(MultibyteIncrementalDecoderObject *self,
PyObject *state)
/*[clinic end generated code: output=106b2fbca3e2dcc2 input=e5d794e8baba1a47]*/
{
PyObject *buffer;
PyLongObject *statelong;
Py_ssize_t buffersize;
const char *bufferstr;
unsigned char statebytes[8];
if (!PyArg_ParseTuple(state, "SO!;setstate(): illegal state argument",
&buffer, &PyLong_Type, &statelong))
{
return NULL;
}
if (_PyLong_AsByteArray(statelong, statebytes, sizeof(statebytes),
1 /* little-endian */ ,
0 /* unsigned */ ) < 0) {
return NULL;
}
buffersize = PyBytes_Size(buffer);
if (buffersize == -1) {
return NULL;
}
if (buffersize > MAXDECPENDING) {
PyErr_SetString(PyExc_UnicodeError, "pending buffer too large");
return NULL;
}
bufferstr = PyBytes_AsString(buffer);
if (bufferstr == NULL) {
return NULL;
}
self->pendingsize = buffersize;
memcpy(self->pending, bufferstr, self->pendingsize);
memcpy(self->state.c, statebytes, sizeof(statebytes));
Py_RETURN_NONE;
}
/*[clinic input]
_multibytecodec.MultibyteIncrementalDecoder.reset
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalDecoder_reset_impl(MultibyteIncrementalDecoderObject *self)
/*[clinic end generated code: output=da423b1782c23ed1 input=3b63b3be85b2fb45]*/
{
if (self->codec->decreset != NULL &&
self->codec->decreset(&self->state, self->codec) != 0)
return NULL;
self->pendingsize = 0;
Py_RETURN_NONE;
}
static struct PyMethodDef mbidecoder_methods[] = {
_MULTIBYTECODEC_MULTIBYTEINCREMENTALDECODER_DECODE_METHODDEF
_MULTIBYTECODEC_MULTIBYTEINCREMENTALDECODER_GETSTATE_METHODDEF
_MULTIBYTECODEC_MULTIBYTEINCREMENTALDECODER_SETSTATE_METHODDEF
_MULTIBYTECODEC_MULTIBYTEINCREMENTALDECODER_RESET_METHODDEF
{NULL, NULL},
};
static PyObject *
mbidecoder_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
MultibyteIncrementalDecoderObject *self;
PyObject *codec = NULL;
char *errors = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "|s:IncrementalDecoder",
incnewkwarglist, &errors))
return NULL;
self = (MultibyteIncrementalDecoderObject *)type->tp_alloc(type, 0);
if (self == NULL)
return NULL;
codec = PyObject_GetAttrString((PyObject *)type, "codec");
if (codec == NULL)
goto errorexit;
module_state *state = find_state_by_def(type);
if (!MultibyteCodec_Check(state, codec)) {
PyErr_SetString(PyExc_TypeError, "codec is unexpected type");
goto errorexit;
}
self->codec = ((MultibyteCodecObject *)codec)->codec;
self->pendingsize = 0;
self->errors = internal_error_callback(errors);
if (self->errors == NULL)
goto errorexit;
if (self->codec->decinit != NULL &&
self->codec->decinit(&self->state, self->codec) != 0)
goto errorexit;
Py_DECREF(codec);
return (PyObject *)self;
errorexit:
Py_XDECREF(self);
Py_XDECREF(codec);
return NULL;
}
static int
mbidecoder_init(PyObject *self, PyObject *args, PyObject *kwds)
{
return 0;
}
static int
mbidecoder_traverse(MultibyteIncrementalDecoderObject *self,
visitproc visit, void *arg)
{
if (ERROR_ISCUSTOM(self->errors))
Py_VISIT(self->errors);
return 0;
}
static void
mbidecoder_dealloc(MultibyteIncrementalDecoderObject *self)
{
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
ERROR_DECREF(self->errors);
tp->tp_free(self);
Py_DECREF(tp);
}
static PyType_Slot decoder_slots[] = {
{Py_tp_dealloc, mbidecoder_dealloc},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_traverse, mbidecoder_traverse},
{Py_tp_methods, mbidecoder_methods},
{Py_tp_getset, codecctx_getsets},
{Py_tp_init, mbidecoder_init},
{Py_tp_new, mbidecoder_new},
{0, NULL},
};
static PyType_Spec decoder_spec = {
.name = MODULE_NAME ".MultibyteIncrementalDecoder",
.basicsize = sizeof(MultibyteIncrementalDecoderObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = decoder_slots,
};
static PyObject *
mbstreamreader_iread(MultibyteStreamReaderObject *self,
const char *method, Py_ssize_t sizehint)
{
MultibyteDecodeBuffer buf;
PyObject *cres, *res;
Py_ssize_t rsize;
if (sizehint == 0)
return PyUnicode_New(0, 0);
_PyUnicodeWriter_Init(&buf.writer);
buf.excobj = NULL;
cres = NULL;
for (;;) {
int endoffile;
if (sizehint < 0)
cres = PyObject_CallMethod(self->stream,
method, NULL);
else
cres = PyObject_CallMethod(self->stream,
method, "i", sizehint);
if (cres == NULL)
goto errorexit;
if (!PyBytes_Check(cres)) {
PyErr_Format(PyExc_TypeError,
"stream function returned a "
"non-bytes object (%.100s)",
Py_TYPE(cres)->tp_name);
goto errorexit;
}
endoffile = (PyBytes_GET_SIZE(cres) == 0);
if (self->pendingsize > 0) {
PyObject *ctr;
char *ctrdata;
if (PyBytes_GET_SIZE(cres) > PY_SSIZE_T_MAX - self->pendingsize) {
PyErr_NoMemory();
goto errorexit;
}
rsize = PyBytes_GET_SIZE(cres) + self->pendingsize;
ctr = PyBytes_FromStringAndSize(NULL, rsize);
if (ctr == NULL)
goto errorexit;
ctrdata = PyBytes_AS_STRING(ctr);
memcpy(ctrdata, self->pending, self->pendingsize);
memcpy(ctrdata + self->pendingsize,
PyBytes_AS_STRING(cres),
PyBytes_GET_SIZE(cres));
Py_SETREF(cres, ctr);
self->pendingsize = 0;
}
rsize = PyBytes_GET_SIZE(cres);
if (decoder_prepare_buffer(&buf, PyBytes_AS_STRING(cres),
rsize) != 0)
goto errorexit;
if (rsize > 0 && decoder_feed_buffer(
(MultibyteStatefulDecoderContext *)self, &buf))
goto errorexit;
if (endoffile || sizehint < 0) {
if (buf.inbuf < buf.inbuf_end &&
multibytecodec_decerror(self->codec, &self->state,
&buf, self->errors, MBERR_TOOFEW))
goto errorexit;
}
if (buf.inbuf < buf.inbuf_end) { /* pending sequence exists */
if (decoder_append_pending(STATEFUL_DCTX(self),
&buf) != 0)
goto errorexit;
}
Py_SETREF(cres, NULL);
if (sizehint < 0 || buf.writer.pos != 0 || rsize == 0)
break;
sizehint = 1; /* read 1 more byte and retry */
}
res = _PyUnicodeWriter_Finish(&buf.writer);
if (res == NULL)
goto errorexit;
Py_XDECREF(cres);
Py_XDECREF(buf.excobj);
return res;
errorexit:
Py_XDECREF(cres);
Py_XDECREF(buf.excobj);
_PyUnicodeWriter_Dealloc(&buf.writer);
return NULL;
}
/*[clinic input]
_multibytecodec.MultibyteStreamReader.read
sizeobj: object = None
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamReader_read_impl(MultibyteStreamReaderObject *self,
PyObject *sizeobj)
/*[clinic end generated code: output=35621eb75355d5b8 input=015b0d3ff2fca485]*/
{
Py_ssize_t size;
if (sizeobj == Py_None)
size = -1;
else if (PyLong_Check(sizeobj))
size = PyLong_AsSsize_t(sizeobj);
else {
PyErr_SetString(PyExc_TypeError, "arg 1 must be an integer");
return NULL;
}
if (size == -1 && PyErr_Occurred())
return NULL;
return mbstreamreader_iread(self, "read", size);
}
/*[clinic input]
_multibytecodec.MultibyteStreamReader.readline
sizeobj: object = None
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamReader_readline_impl(MultibyteStreamReaderObject *self,
PyObject *sizeobj)
/*[clinic end generated code: output=4fbfaae1ed457a11 input=41ccc64f9bb0cec3]*/
{
Py_ssize_t size;
if (sizeobj == Py_None)
size = -1;
else if (PyLong_Check(sizeobj))
size = PyLong_AsSsize_t(sizeobj);
else {
PyErr_SetString(PyExc_TypeError, "arg 1 must be an integer");
return NULL;
}
if (size == -1 && PyErr_Occurred())
return NULL;
return mbstreamreader_iread(self, "readline", size);
}
/*[clinic input]
_multibytecodec.MultibyteStreamReader.readlines
sizehintobj: object = None
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamReader_readlines_impl(MultibyteStreamReaderObject *self,
PyObject *sizehintobj)
/*[clinic end generated code: output=e7c4310768ed2ad4 input=54932f5d4d88e880]*/
{
PyObject *r, *sr;
Py_ssize_t sizehint;
if (sizehintobj == Py_None)
sizehint = -1;
else if (PyLong_Check(sizehintobj))
sizehint = PyLong_AsSsize_t(sizehintobj);
else {
PyErr_SetString(PyExc_TypeError, "arg 1 must be an integer");
return NULL;
}
if (sizehint == -1 && PyErr_Occurred())
return NULL;
r = mbstreamreader_iread(self, "read", sizehint);
if (r == NULL)
return NULL;
sr = PyUnicode_Splitlines(r, 1);
Py_DECREF(r);
return sr;
}
/*[clinic input]
_multibytecodec.MultibyteStreamReader.reset
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamReader_reset_impl(MultibyteStreamReaderObject *self)
/*[clinic end generated code: output=138490370a680abc input=5d4140db84b5e1e2]*/
{
if (self->codec->decreset != NULL &&
self->codec->decreset(&self->state, self->codec) != 0)
return NULL;
self->pendingsize = 0;
Py_RETURN_NONE;
}
static struct PyMethodDef mbstreamreader_methods[] = {
_MULTIBYTECODEC_MULTIBYTESTREAMREADER_READ_METHODDEF
_MULTIBYTECODEC_MULTIBYTESTREAMREADER_READLINE_METHODDEF
_MULTIBYTECODEC_MULTIBYTESTREAMREADER_READLINES_METHODDEF
_MULTIBYTECODEC_MULTIBYTESTREAMREADER_RESET_METHODDEF
{NULL, NULL},
};
static PyMemberDef mbstreamreader_members[] = {
{"stream", _Py_T_OBJECT,
offsetof(MultibyteStreamReaderObject, stream),
Py_READONLY, NULL},
{NULL,}
};
static PyObject *
mbstreamreader_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
MultibyteStreamReaderObject *self;
PyObject *stream, *codec = NULL;
char *errors = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|s:StreamReader",
streamkwarglist, &stream, &errors))
return NULL;
self = (MultibyteStreamReaderObject *)type->tp_alloc(type, 0);
if (self == NULL)
return NULL;
codec = PyObject_GetAttrString((PyObject *)type, "codec");
if (codec == NULL)
goto errorexit;
module_state *state = find_state_by_def(type);
if (!MultibyteCodec_Check(state, codec)) {
PyErr_SetString(PyExc_TypeError, "codec is unexpected type");
goto errorexit;
}
self->codec = ((MultibyteCodecObject *)codec)->codec;
self->stream = Py_NewRef(stream);
self->pendingsize = 0;
self->errors = internal_error_callback(errors);
if (self->errors == NULL)
goto errorexit;
if (self->codec->decinit != NULL &&
self->codec->decinit(&self->state, self->codec) != 0)
goto errorexit;
Py_DECREF(codec);
return (PyObject *)self;
errorexit:
Py_XDECREF(self);
Py_XDECREF(codec);
return NULL;
}
static int
mbstreamreader_init(PyObject *self, PyObject *args, PyObject *kwds)
{
return 0;
}
static int
mbstreamreader_traverse(MultibyteStreamReaderObject *self,
visitproc visit, void *arg)
{
if (ERROR_ISCUSTOM(self->errors))
Py_VISIT(self->errors);
Py_VISIT(self->stream);
return 0;
}
static void
mbstreamreader_dealloc(MultibyteStreamReaderObject *self)
{
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
ERROR_DECREF(self->errors);
Py_XDECREF(self->stream);
tp->tp_free(self);
Py_DECREF(tp);
}
static PyType_Slot reader_slots[] = {
{Py_tp_dealloc, mbstreamreader_dealloc},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_traverse, mbstreamreader_traverse},
{Py_tp_methods, mbstreamreader_methods},
{Py_tp_members, mbstreamreader_members},
{Py_tp_getset, codecctx_getsets},
{Py_tp_init, mbstreamreader_init},
{Py_tp_new, mbstreamreader_new},
{0, NULL},
};
static PyType_Spec reader_spec = {
.name = MODULE_NAME ".MultibyteStreamReader",
.basicsize = sizeof(MultibyteStreamReaderObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = reader_slots,
};
static int
mbstreamwriter_iwrite(MultibyteStreamWriterObject *self,
PyObject *unistr, PyObject *str_write)
{
PyObject *str, *wr;
str = encoder_encode_stateful(STATEFUL_ECTX(self), unistr, 0);
if (str == NULL)
return -1;
wr = PyObject_CallMethodOneArg(self->stream, str_write, str);
Py_DECREF(str);
if (wr == NULL)
return -1;
Py_DECREF(wr);
return 0;
}
/*[clinic input]
_multibytecodec.MultibyteStreamWriter.write
cls: defining_class
strobj: object
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamWriter_write_impl(MultibyteStreamWriterObject *self,
PyTypeObject *cls,
PyObject *strobj)
/*[clinic end generated code: output=68ade3aea26410ac input=199f26f68bd8425a]*/
{
module_state *state = PyType_GetModuleState(cls);
assert(state != NULL);
if (mbstreamwriter_iwrite(self, strobj, state->str_write)) {
return NULL;
}
Py_RETURN_NONE;
}
/*[clinic input]
_multibytecodec.MultibyteStreamWriter.writelines
cls: defining_class
lines: object
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamWriter_writelines_impl(MultibyteStreamWriterObject *self,
PyTypeObject *cls,
PyObject *lines)
/*[clinic end generated code: output=b4c99d2cf23ffb88 input=a6d5fe7c74972a34]*/
{
PyObject *strobj;
int i, r;
if (!PySequence_Check(lines)) {
PyErr_SetString(PyExc_TypeError,
"arg must be a sequence object");
return NULL;
}
module_state *state = PyType_GetModuleState(cls);
assert(state != NULL);
for (i = 0; i < PySequence_Length(lines); i++) {
/* length can be changed even within this loop */
strobj = PySequence_GetItem(lines, i);
if (strobj == NULL)
return NULL;
r = mbstreamwriter_iwrite(self, strobj, state->str_write);
Py_DECREF(strobj);
if (r == -1)
return NULL;
}
/* PySequence_Length() can fail */
if (PyErr_Occurred())
return NULL;
Py_RETURN_NONE;
}
/*[clinic input]
_multibytecodec.MultibyteStreamWriter.reset
cls: defining_class
/
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteStreamWriter_reset_impl(MultibyteStreamWriterObject *self,
PyTypeObject *cls)
/*[clinic end generated code: output=32ef224c2a38aa3d input=28af6a9cd38d1979]*/
{
PyObject *pwrt;
if (!self->pending)
Py_RETURN_NONE;
pwrt = multibytecodec_encode(self->codec, &self->state,
self->pending, NULL, self->errors,
MBENC_FLUSH | MBENC_RESET);
/* some pending buffer can be truncated when UnicodeEncodeError is
* raised on 'strict' mode. but, 'reset' method is designed to
* reset the pending buffer or states so failed string sequence
* ought to be missed */
Py_CLEAR(self->pending);
if (pwrt == NULL)
return NULL;
assert(PyBytes_Check(pwrt));
module_state *state = PyType_GetModuleState(cls);
assert(state != NULL);
if (PyBytes_Size(pwrt) > 0) {
PyObject *wr;
wr = PyObject_CallMethodOneArg(self->stream, state->str_write, pwrt);
if (wr == NULL) {
Py_DECREF(pwrt);
return NULL;
}
}
Py_DECREF(pwrt);
Py_RETURN_NONE;
}
static PyObject *
mbstreamwriter_new(PyTypeObject *type, PyObject *args, PyObject *kwds)
{
MultibyteStreamWriterObject *self;
PyObject *stream, *codec = NULL;
char *errors = NULL;
if (!PyArg_ParseTupleAndKeywords(args, kwds, "O|s:StreamWriter",
streamkwarglist, &stream, &errors))
return NULL;
self = (MultibyteStreamWriterObject *)type->tp_alloc(type, 0);
if (self == NULL)
return NULL;
codec = PyObject_GetAttrString((PyObject *)type, "codec");
if (codec == NULL)
goto errorexit;
module_state *state = find_state_by_def(type);
if (!MultibyteCodec_Check(state, codec)) {
PyErr_SetString(PyExc_TypeError, "codec is unexpected type");
goto errorexit;
}
self->codec = ((MultibyteCodecObject *)codec)->codec;
self->stream = Py_NewRef(stream);
self->pending = NULL;
self->errors = internal_error_callback(errors);
if (self->errors == NULL)
goto errorexit;
if (self->codec->encinit != NULL &&
self->codec->encinit(&self->state, self->codec) != 0)
goto errorexit;
Py_DECREF(codec);
return (PyObject *)self;
errorexit:
Py_XDECREF(self);
Py_XDECREF(codec);
return NULL;
}
static int
mbstreamwriter_init(PyObject *self, PyObject *args, PyObject *kwds)
{
return 0;
}
static int
mbstreamwriter_traverse(MultibyteStreamWriterObject *self,
visitproc visit, void *arg)
{
if (ERROR_ISCUSTOM(self->errors))
Py_VISIT(self->errors);
Py_VISIT(self->stream);
return 0;
}
static void
mbstreamwriter_dealloc(MultibyteStreamWriterObject *self)
{
PyTypeObject *tp = Py_TYPE(self);
PyObject_GC_UnTrack(self);
ERROR_DECREF(self->errors);
Py_XDECREF(self->stream);
tp->tp_free(self);
Py_DECREF(tp);
}
static struct PyMethodDef mbstreamwriter_methods[] = {
_MULTIBYTECODEC_MULTIBYTESTREAMWRITER_WRITE_METHODDEF
_MULTIBYTECODEC_MULTIBYTESTREAMWRITER_WRITELINES_METHODDEF
_MULTIBYTECODEC_MULTIBYTESTREAMWRITER_RESET_METHODDEF
{NULL, NULL},
};
static PyMemberDef mbstreamwriter_members[] = {
{"stream", _Py_T_OBJECT,
offsetof(MultibyteStreamWriterObject, stream),
Py_READONLY, NULL},
{NULL,}
};
static PyType_Slot writer_slots[] = {
{Py_tp_dealloc, mbstreamwriter_dealloc},
{Py_tp_getattro, PyObject_GenericGetAttr},
{Py_tp_traverse, mbstreamwriter_traverse},
{Py_tp_methods, mbstreamwriter_methods},
{Py_tp_members, mbstreamwriter_members},
{Py_tp_getset, codecctx_getsets},
{Py_tp_init, mbstreamwriter_init},
{Py_tp_new, mbstreamwriter_new},
{0, NULL},
};
static PyType_Spec writer_spec = {
.name = MODULE_NAME ".MultibyteStreamWriter",
.basicsize = sizeof(MultibyteStreamWriterObject),
.flags = (Py_TPFLAGS_DEFAULT | Py_TPFLAGS_HAVE_GC | Py_TPFLAGS_BASETYPE |
Py_TPFLAGS_IMMUTABLETYPE),
.slots = writer_slots,
};
/*[clinic input]
_multibytecodec.__create_codec
arg: object
/
[clinic start generated code]*/
static PyObject *
_multibytecodec___create_codec(PyObject *module, PyObject *arg)
/*[clinic end generated code: output=cfa3dce8260e809d input=6840b2a6b183fcfa]*/
{
MultibyteCodecObject *self;
if (!PyCapsule_IsValid(arg, CODEC_CAPSULE)) {
PyErr_SetString(PyExc_ValueError, "argument type invalid");
return NULL;
}
codec_capsule *data = PyCapsule_GetPointer(arg, CODEC_CAPSULE);
const MultibyteCodec *codec = data->codec;
if (codec->codecinit != NULL && codec->codecinit(codec) != 0)
return NULL;
module_state *state = get_module_state(module);
self = PyObject_GC_New(MultibyteCodecObject, state->multibytecodec_type);
if (self == NULL)
return NULL;
self->codec = codec;
self->cjk_module = Py_NewRef(data->cjk_module);
PyObject_GC_Track(self);
return (PyObject *)self;
}
static int
_multibytecodec_traverse(PyObject *mod, visitproc visit, void *arg)
{
module_state *state = get_module_state(mod);
Py_VISIT(state->multibytecodec_type);
Py_VISIT(state->encoder_type);
Py_VISIT(state->decoder_type);
Py_VISIT(state->reader_type);
Py_VISIT(state->writer_type);
return 0;
}
static int
_multibytecodec_clear(PyObject *mod)
{
module_state *state = get_module_state(mod);
Py_CLEAR(state->multibytecodec_type);
Py_CLEAR(state->encoder_type);
Py_CLEAR(state->decoder_type);
Py_CLEAR(state->reader_type);
Py_CLEAR(state->writer_type);
Py_CLEAR(state->str_write);
return 0;
}
static void
_multibytecodec_free(void *mod)
{
_multibytecodec_clear((PyObject *)mod);
}
#define CREATE_TYPE(module, type, spec) \
do { \
type = (PyTypeObject *)PyType_FromModuleAndSpec(module, spec, NULL); \
if (!type) { \
return -1; \
} \
} while (0)
#define ADD_TYPE(module, type) \
do { \
if (PyModule_AddType(module, type) < 0) { \
return -1; \
} \
} while (0)
static int
_multibytecodec_exec(PyObject *mod)
{
module_state *state = get_module_state(mod);
state->str_write = PyUnicode_InternFromString("write");
if (state->str_write == NULL) {
return -1;
}
CREATE_TYPE(mod, state->multibytecodec_type, &multibytecodec_spec);
CREATE_TYPE(mod, state->encoder_type, &encoder_spec);
CREATE_TYPE(mod, state->decoder_type, &decoder_spec);
CREATE_TYPE(mod, state->reader_type, &reader_spec);
CREATE_TYPE(mod, state->writer_type, &writer_spec);
ADD_TYPE(mod, state->encoder_type);
ADD_TYPE(mod, state->decoder_type);
ADD_TYPE(mod, state->reader_type);
ADD_TYPE(mod, state->writer_type);
return 0;
}
#undef CREATE_TYPE
#undef ADD_TYPE
static struct PyMethodDef _multibytecodec_methods[] = {
_MULTIBYTECODEC___CREATE_CODEC_METHODDEF
{NULL, NULL},
};
static PyModuleDef_Slot _multibytecodec_slots[] = {
{Py_mod_exec, _multibytecodec_exec},
{Py_mod_multiple_interpreters, Py_MOD_PER_INTERPRETER_GIL_SUPPORTED},
{0, NULL}
};
static struct PyModuleDef _multibytecodecmodule = {
.m_base = PyModuleDef_HEAD_INIT,
.m_name = "_multibytecodec",
.m_size = sizeof(module_state),
.m_methods = _multibytecodec_methods,
.m_slots = _multibytecodec_slots,
.m_traverse = _multibytecodec_traverse,
.m_clear = _multibytecodec_clear,
.m_free = _multibytecodec_free,
};
PyMODINIT_FUNC
PyInit__multibytecodec(void)
{
return PyModuleDef_Init(&_multibytecodecmodule);
}
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