/*
 * Copyright (C) 2019 Weber Yann
 * 
 * This file is part of PyFCGI.
 * 
 * PyFCGI is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 * 
 * PyFCGI 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 Affero General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with PyFCGI.  If not, see <http://www.gnu.org/licenses/>.
 */

/**@defgroup lib_ioin Defines libpyfcgi.IoIn class
 * @brief The IoIn class implement base IO interface allowing python to read
 * HTTP request from FCGI
 * @ingroup libpyfcgi
 */
/**@file python_ioin.h
 * @ingroup lib_ioin
 */

#ifndef _PYTHON_IOIN__H__
#define _PYTHON_IOIN__H__

#include "config.h"

#include <fcgiapp.h>
#include <fcgi_stdio.h> /* fcgi library; put it first */

#define PY_SSIZE_T_CLEAN
#include <Python.h>
#include "structmember.h"

#include <limits.h>
#include <stdlib.h>

typedef int (*write_f)(const char*, size_t);

#define IoIn__FromString(self, str) \
(((PyIO_t*)self)->bin?PyBytes_FromString:PyUnicode_FromString)(str)

#define IoIn__FromBuff(self) IoIn__FromString(self, ((PyIO_t*)self)->buff)

extern PyMethodDef IoIn_methods[];
extern PyMemberDef IoIn_members[];
extern PyTypeObject IoInType;

extern PyMethodDef IoOut_methods[];
extern PyMemberDef IoOut_members[];
extern PyTypeObject IoOutType;

typedef struct
{
	PyObject_VAR_HEAD;
	PyObject *closed;
	FCGX_Stream **io_stream;
	char *buff;
	/**@brief buffer size */
	int buff_sz;
	/**@brief 1 if binary stream (sending PyBytes) 0 if sending PyUnicode */
	short bin;
	/**@brief 1 if EOF encountered, else 0 */
	short eof;

	write_f write;
} PyIO_t;

int pyfcgi_io_init(PyObject *self);
int pyfcgi_ioin_init(PyObject *self, PyObject *args, PyObject *kwds);
int pyfcgi_ioout_init(PyObject *self, PyObject *args, PyObject *kwds);

void pyfcgi_io_del(PyIO_t *self);

PyObject* pyfcgi_io_close(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_io_fileno(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_io_flush(PyObject *self, PyObject **argv, Py_ssize_t argc);

PyObject* pyfcgi_io_truncate(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_io_seekable(PyObject *self, PyObject **argv, Py_ssize_t argc);
#define pyfcgi_io_seekable pyfcgi_io_false
#define pyfcgi_io_isatty pyfcgi_io_false

PyObject* pyfcgi_io_SeekError(PyObject *self, PyObject **argv, Py_ssize_t argc);
#define pyfcgi_io_seek pyfcgi_io_SeekError
#define pyfcgi_io_tell pyfcgi_io_SeekError

PyObject* pyfcgi_io_WriteError(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_io_ReadError(PyObject *self, PyObject **argv, Py_ssize_t argc);

#define pyfcgi_ioin_readable pyfcgi_io_true
PyObject* pyfcgi_ioin_readline(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_ioin_readlines(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_ioin_read(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_ioin_readall(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_ioin_readinto(PyObject *self, PyObject **argv, Py_ssize_t argc);

#define pyfcgi_ioin_writable pyfcgi_io_true
#define pyfcgi_ioin_writelines pyfcgi_io_WriteError
#define pyfcgi_ioin_write pyfcgi_io_WriteError

#define pyfcgi_ioout_readable pyfcgi_io_false
#define pyfcgi_ioout_readline pyfcgi_io_ReadError
#define pyfcgi_ioout_readlines pyfcgi_io_ReadError
#define pyfcgi_ioout_read pyfcgi_io_ReadError
#define pyfcgi_ioout_readall pyfcgi_io_ReadError
#define pyfcgi_ioout_readinto pyfcgi_io_ReadError

#define pyfcgi_ioout_writable pyfcgi_io_true
PyObject* pyfcgi_ioout_writelines(PyObject *self, PyObject **argv, Py_ssize_t argc);
PyObject* pyfcgi_ioout_write(PyObject *self, PyObject **argv, Py_ssize_t argc);

#endif