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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 char Iconv_iconv__doc__[]=
"iconv(in[, outlen[, return_unicode[, count_only]]]) -> out\n"
"Convert in to out. outlen is the size of the output buffer;\n"
"it defaults to len(in).";
static PyObject*
Iconv_iconv(IconvObject *self, PyObject *args, PyObject* kwargs)
{
PyObject *inbuf_obj;
const char *inbuf;
char *outbuf;
size_t inbuf_size, outbuf_size, iresult;
int inbuf_size_int, outbuf_size_int = -1;
int return_unicode = 0, count_only = 0;
PyObject *result;
static char *kwarg_names[]={
"s",
"outlen",
"return_unicode",
"count_only",
NULL
};
if (!PyArg_ParseTupleAndKeywords(args, kwargs,
"O|iii:iconv", kwarg_names,
&inbuf_obj, &outbuf_size_int,
&return_unicode, &count_only))
return NULL;
if (inbuf_obj == Py_None){
/* None means to clear the iconv object */
inbuf = NULL;
inbuf_size_int = 0;
}else if (inbuf_obj->ob_type->tp_as_buffer){
if (PyObject_AsReadBuffer(inbuf_obj, (const void**)&inbuf,
&inbuf_size_int) == -1)
return NULL;
}else{
PyErr_SetString(PyExc_TypeError,
"iconv expects string as first argument");
return NULL;
}
/* If no result size estimate was given, estimate that the result
string is the same size as the input string. */
if (outbuf_size_int == -1)
outbuf_size_int = inbuf_size_int;
inbuf_size = inbuf_size_int;
if (count_only){
result = NULL;
outbuf = NULL;
outbuf_size = outbuf_size_int;
}else if(return_unicode){
/* Allocate the result string. */
result = PyUnicode_FromUnicode(NULL, outbuf_size_int);
outbuf = (char*)PyUnicode_AS_UNICODE(result);
outbuf_size = outbuf_size_int*2;
}else{
/* Allocate the result string. */
result = PyString_FromStringAndSize(NULL, outbuf_size_int);
if (!result)
return NULL;
outbuf = PyString_AS_STRING(result);
outbuf_size = outbuf_size_int;
}
/* Perform the conversion. */
iresult = iconv(self->handle, &inbuf, &inbuf_size, &outbuf, &outbuf_size);
if (count_only){
result = PyInt_FromLong(outbuf_size_int-outbuf_size);
}else if (return_unicode) {
/* If the conversion was successful, the result string may be
larger than necessary; outbuf_size will present the extra
bytes. */
PyUnicode_Resize(&result, outbuf_size_int-outbuf_size/2);
}else{
_PyString_Resize(&result, outbuf_size_int-outbuf_size);
}
if (iresult == -1){
PyObject *exc;
exc = PyObject_CallFunction(error,"siiO",
strerror(errno),errno,
inbuf_size_int - inbuf_size,
result);
Py_DECREF(result);
PyErr_SetObject(error,exc);
return NULL;
}
return result;
}
static PyMethodDef Iconv_methods[] = {
{"iconv", (PyCFunction)Iconv_iconv,
METH_KEYWORDS|METH_VARARGS, Iconv_iconv__doc__},
{NULL, NULL} /* sentinel */
};
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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