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#include <iconv.h>
#include <Python.h>
typedef struct {
PyObject_HEAD
iconv_t handle;
} IconvObject;
static PyObject *error;
staticforward PyTypeObject Iconv_Type;
static char iconv_open__doc__[]=
"open(tocode, fromcode) -> iconv handle\n"
"allocate descriptor for character set conversion";
static PyObject*
py_iconv_open(PyObject* unused, PyObject* args)
{
char *tocode, *fromcode;
iconv_t result;
IconvObject *self;
if (!PyArg_ParseTuple(args, "ss", &tocode, &fromcode))
return NULL;
result = iconv_open(tocode, fromcode);
if (result == (iconv_t)(-1)) {
PyErr_SetFromErrno(PyExc_ValueError);
return NULL;
}
self = PyObject_New(IconvObject, &Iconv_Type);
if (self == NULL) {
iconv_close(result);
return NULL;
}
self->handle = result;
return (PyObject*) self;
}
static void
Iconv_dealloc(IconvObject *self)
{
iconv_close(self->handle);
PyObject_Del(self);
}
static PyObject*
Iconv_iconv(IconvObject *self, PyObject *args, PyObject* kwargs)
{
PyObject *inbuf_obj;
const char *inbuf, *inptr;
char *outbuf, *outptr;
size_t inleft, outleft, result;
PyObject *ret;
static char *kwarg_names[] = { "in", NULL };
if (!PyArg_ParseTupleAndKeywords(args, kwargs, "O:iconv", kwarg_names,
&inbuf_obj))
return NULL;
if (inbuf_obj->ob_type->tp_as_buffer) {
if (PyObject_AsReadBuffer(inbuf_obj, (const void**) &inbuf,
&inleft) == -1)
return NULL;
inptr = inbuf;
} else {
PyErr_SetString(PyExc_TypeError,
"iconv expects string as first argument");
return NULL;
}
/* begin with the same amount of space as the input */
outptr = outbuf = malloc(inleft);
outleft = inleft;
/* Perform the conversion. */
do {
result = iconv(self->handle, (char **) &inptr, &inleft, &outptr, &outleft);
if (result == (size_t) -1) {
if (errno == E2BIG) {
/* we ran out of space in outbuf, it needs to be bigger */
char *newbuf;
/* a guess at how much more we need */
size_t curpos, extra = inleft * 2;
curpos = outptr - outbuf;
newbuf = realloc(outbuf, outptr - outbuf + extra);
if (newbuf == NULL) {
free(outbuf);
/* XXX set exception */
return NULL;
}
outbuf = newbuf;
outptr = outbuf + curpos;
/* now we have more space to convert into */
outleft += extra;
} else {
/* if we managed to convert everything up to the last byte,
it was probably a NULL terminated string (you can't convert
the NULL) */
if (inleft == 0)
break;
PyErr_SetFromErrno(PyExc_SystemError);
free(outbuf);
return NULL;
}
}
} while (inleft > 0);
ret = PyString_FromStringAndSize(outbuf, outptr - outbuf);
free(outbuf);
return ret;
}
static char Iconv_iconv__doc__[] =
"iconv(in) -> out\n"
"Convert in to out.";
static PyMethodDef Iconv_methods[] = {
{ "iconv", (PyCFunction)Iconv_iconv,
METH_KEYWORDS | METH_VARARGS, Iconv_iconv__doc__},
{ NULL, NULL }
};
static PyObject *
Iconv_getattr(PyObject *self, char *name)
{
return Py_FindMethod(Iconv_methods, self, name);
}
statichere PyTypeObject Iconv_Type = {
PyObject_HEAD_INIT(NULL)
0, /*ob_size*/
"Iconv", /*tp_name*/
sizeof(IconvObject), /*tp_basicsize*/
0, /*tp_itemsize*/
/* methods */
(destructor)Iconv_dealloc, /*tp_dealloc*/
0, /*tp_print*/
(getattrfunc)Iconv_getattr, /*tp_getattr*/
0, /*tp_setattr*/
0, /*tp_compare*/
0, /*tp_repr*/
0, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
0, /*tp_hash*/
};
static PyMethodDef iconv_methods[] = {
{ "open", py_iconv_open,
METH_VARARGS, iconv_open__doc__},
{ NULL, NULL} /* sentinel */
};
static char __doc__[] =
"The iconv module provides an interface to the iconv library.";
DL_EXPORT(void)
initiconv(void)
{
PyObject *m, *d;
Iconv_Type.ob_type = &PyType_Type;
/* Create the module and add the functions */
m = Py_InitModule4("iconv", iconv_methods, __doc__,
NULL, PYTHON_API_VERSION);
/* Add some symbolic constants to the module */
d = PyModule_GetDict(m);
error = PyErr_NewException("iconv.error", PyExc_ValueError, NULL);
PyDict_SetItemString(d, "error", error);
}
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