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/*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* Copyright (C) 2005,2006,2010 Yaacov Zamir, Nir Soffer */
#include <Python.h>
#include <fribidi.h>
#if PY_MAJOR_VERSION >= 3
#define PYFRIBIDI_UNICODE_OBJECT PyObject
#else
#define PYFRIBIDI_UNICODE_OBJECT PyUnicodeObject
#endif
static PyObject *
unicode_log2vis (PYFRIBIDI_UNICODE_OBJECT * string,
FriBidiParType base_direction, int clean, int reordernsm)
{
int i;
#if PY_MAJOR_VERSION >= 3
Py_ssize_t length = PyUnicode_GetLength(string);
#else
int length = string->length;
#endif
FriBidiChar *logical = NULL; /* input fribidi unicode buffer */
FriBidiChar *visual = NULL; /* output fribidi unicode buffer */
PYFRIBIDI_UNICODE_OBJECT *result = NULL;
/* Allocate fribidi unicode buffers
TODO - Don't copy strings if sizeof(FriBidiChar) == sizeof(Py_UNICODE)
*/
logical = PyMem_New (FriBidiChar, length + 1);
if (logical == NULL) {
PyErr_NoMemory();
goto cleanup;
}
visual = PyMem_New (FriBidiChar, length + 1);
if (visual == NULL) {
PyErr_NoMemory();
goto cleanup;
}
PyUnicode_AsWideChar(string, logical, length);
/* Convert to unicode and order visually */
fribidi_set_reorder_nsm(reordernsm);
if (!fribidi_log2vis (logical, length, &base_direction, visual,
NULL, NULL, NULL)) {
PyErr_SetString (PyExc_RuntimeError,
"fribidi failed to order string");
goto cleanup;
}
/* Cleanup the string if requested */
if (clean) {
length = fribidi_remove_bidi_marks (visual, length, NULL, NULL, NULL);
}
result = PyUnicode_FromWideChar(visual, length);
if (result == NULL) {
goto cleanup;
}
cleanup:
/* Delete unicode buffers */
PyMem_Del (logical);
PyMem_Del (visual);
return (PyObject *)result;
}
static PyObject *
_pyfribidi_log2vis (PyObject * self, PyObject * args, PyObject * kw)
{
PYFRIBIDI_UNICODE_OBJECT *logical = NULL; /* input unicode or string object */
FriBidiParType base = FRIBIDI_TYPE_RTL; /* optional direction */
int clean = 0; /* optional flag to clean the string */
int reordernsm = 1; /* optional flag to allow reordering of non spacing marks*/
static char *kwargs[] =
{ "logical", "base_direction", "clean", "reordernsm", NULL };
if (!PyArg_ParseTupleAndKeywords (args, kw, "U|iii", kwargs,
&logical, &base, &clean, &reordernsm)) {
return NULL;
}
/* Validate base */
if (!(base == FRIBIDI_TYPE_RTL
|| base == FRIBIDI_TYPE_LTR
|| base == FRIBIDI_TYPE_ON)) {
return PyErr_Format (PyExc_ValueError,
"invalid value %d: use either RTL, LTR or ON",
base);
}
PyObject * return_pyobject = unicode_log2vis (logical, base, clean, reordernsm);
return return_pyobject;
}
static PyMethodDef PyfribidiMethods[] = {
{"log2vis", (PyCFunction) _pyfribidi_log2vis, METH_VARARGS | METH_KEYWORDS, NULL},
{NULL, NULL, 0, NULL}
};
#if PY_MAJOR_VERSION >= 3
static struct PyModuleDef pyfribidi_moduledef = {
PyModuleDef_HEAD_INIT, /* m_base */
"pyfribidi", /* m_name */
NULL, /* m_doc */
-1, /* m_size == -1 means cannot be reinitialized */
PyfribidiMethods, //
NULL, // myextension_traverse,
NULL, // myextension_clear,
NULL
};
PyMODINIT_FUNC
PyInit__pyfribidi (void)
#else
void
init_pyfribidi (void)
#endif
{
#if PY_MAJOR_VERSION >= 3
PyObject *module = PyModule_Create (&pyfribidi_moduledef);
#else
PyObject *module = Py_InitModule ("_pyfribidi", PyfribidiMethods);
#endif
if (module == NULL) return NULL;
PyModule_AddIntConstant (module, "RTL", (long) FRIBIDI_TYPE_RTL);
PyModule_AddIntConstant (module, "LTR", (long) FRIBIDI_TYPE_LTR);
PyModule_AddIntConstant (module, "ON", (long) FRIBIDI_TYPE_ON);
#if PY_MAJOR_VERSION >= 3
return module;
#endif
}
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