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multibytecodec.c
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/*
* multibytecodec.c: Common Multibyte Codec Implementation
*
* Written by Hye-Shik Chang <perky@FreeBSD.org>
*/
#define PY_SSIZE_T_CLEAN
#include "Python.h"
#include "structmember.h"
#include "multibytecodec.h"
#include "clinic/multibytecodec.c.h"
/*[clinic input]
module _multibytecodec
class _multibytecodec.MultibyteCodec "MultibyteCodecObject *" "&MultibyteCodec_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=6ad689546cbb5450]*/
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(MultibyteCodec *,
MultibyteCodec_State *, PyObject *, Py_ssize_t *,
PyObject *, int);
#define MBENC_RESET MBENC_MAX<<1 /* reset after an encoding session */
_Py_IDENTIFIER(write);
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 *args, *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;
args = PyTuple_New(1);
if (args == NULL) {
Py_DECREF(cb);
return NULL;
}
PyTuple_SET_ITEM(args, 0, exc);
Py_INCREF(exc);
r = PyObject_CallObject(cb, args);
Py_DECREF(args);
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 {
Py_INCREF(self->errors);
return 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(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;
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->config,
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 {
Py_INCREF(tobj);
retstr = 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(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(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;
void *data;
if (PyUnicode_READY(text) < 0)
return NULL;
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->config,
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->config, &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}) = NULL
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=05f6ced3c8dd0582]*/
{
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;
}
}
if (PyUnicode_READY(input) < 0) {
Py_XDECREF(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->config) != 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}) = NULL
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=a7d45f87f75e5e02]*/
{
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->config) != 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->config,
&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 void
multibytecodec_dealloc(MultibyteCodecObject *self)
{
PyObject_Del(self);
}
static PyTypeObject MultibyteCodec_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"MultibyteCodec", /* tp_name */
sizeof(MultibyteCodecObject), /* tp_basicsize */
0, /* tp_itemsize */
/* methods */
(destructor)multibytecodec_dealloc, /* tp_dealloc */
0, /* tp_print */
0, /* tp_getattr */
0, /* tp_setattr */
0, /* tp_reserved */
0, /* tp_repr */
0, /* tp_as_number */
0, /* tp_as_sequence */
0, /* tp_as_mapping */
0, /* tp_hash */
0, /* tp_call */
0, /* tp_str */
PyObject_GenericGetAttr, /* tp_getattro */
0, /* tp_setattro */
0, /* tp_as_buffer */
Py_TPFLAGS_DEFAULT, /* tp_flags */
0, /* tp_doc */
0, /* tp_traverse */
0, /* tp_clear */
0, /* tp_richcompare */
0, /* tp_weaklistoffset */
0, /* tp_iter */
0, /* tp_iterext */
multibytecodec_methods, /* tp_methods */
};
/**
* 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;
Py_INCREF(ctx->pending);
origpending = ctx->pending;
Py_INCREF(ctx->pending);
inbuf_tmp = ctx->pending;
PyUnicode_Append(&inbuf_tmp, unistr);
if (inbuf_tmp == NULL)
goto errorexit;
Py_CLEAR(ctx->pending);
inbuf = inbuf_tmp;
}
else {
origpending = NULL;
Py_INCREF(unistr);
inbuf = unistr;
}
if (PyUnicode_READY(inbuf) < 0)
goto errorexit;
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->config,
&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]
class _multibytecodec.MultibyteIncrementalEncoder "MultibyteIncrementalEncoderObject *" "&MultibyteIncrementalEncoder_Type"
[clinic start generated code]*/
/*[clinic end generated code: output=da39a3ee5e6b4b0d input=3be82909cd08924d]*/
/*[clinic input]
_multibytecodec.MultibyteIncrementalEncoder.encode
input: object
final: bool(accept={int}) = False
[clinic start generated code]*/
static PyObject *
_multibytecodec_MultibyteIncrementalEncoder_encode_impl(MultibyteIncrementalEncoderObject *self,
PyObject *input,
int final)
/*[clinic end generated code: output=123361b6c505e2c1 input=093a1ddbb2fc6721]*/
{
return encoder_encode_stateful(STATEFUL_ECTX(self), input, final);
}
/*[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->config,
&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_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;
if (!MultibyteCodec_Check(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->config) != 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)
{
PyObject_GC_UnTrack(self);
ERROR_DECREF(self->errors);
Py_TYPE(self)->tp_free(self);
}
static PyTypeObject MultibyteIncrementalEncoder_Type = {
PyVarObject_HEAD_INIT(NULL, 0)
"MultibyteIncrementalEncoder", /* tp_name */
sizeof(MultibyteIncrementalEncoderObject), /* tp_basicsize */
0, /* tp_itemsize */
/* methods */
(destructor)mbiencoder_dealloc, /* tp_dealloc */