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/*
* kmscon - Pseudo Terminal Handling
*
* Copyright (c) 2012 Ran Benita <ran234@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The pty object provides an interface for communicating with a child process
* over a pseudo terminal. The child is the host, we act as the TTY terminal,
* and the kernel is the driver.
*
* To use this, create a new pty object and open it. You will start receiving
* output notifications through the output_cb callback. To communicate with
* the other end of the terminal, use the kmscon_pty_input method. All
* communication is done using byte streams (presumably UTF-8).
*
* The pty can be closed voluntarily using the kmson_pty_close method. The
* child process can also exit at will; this will be communicated through the
* closed_cb callback. The pty object does not wait on the child processes it
* spawns; this is the responsibility of the object's user.
*/
#ifndef KMSCON_PTY_H
#define KMSCON_PTY_H
#include <stdlib.h>
#include "eloop.h"
struct kmscon_pty;
typedef void (*kmscon_pty_input_cb)
(struct kmscon_pty *pty, const char *u8, size_t len, void *data);
int kmscon_pty_new(struct kmscon_pty **out, struct ev_eloop *loop,
kmscon_pty_input_cb input_cb, void *data);
void kmscon_pty_ref(struct kmscon_pty *pty);
void kmscon_pty_unref(struct kmscon_pty *pty);
int kmscon_pty_open(struct kmscon_pty *pty, unsigned short width,
unsigned short height);
void kmscon_pty_close(struct kmscon_pty *pty);
int kmscon_pty_write(struct kmscon_pty *pty, const char *u8, size_t len);
/*
* Call this whenever the size of the screen (rows or columns) changes. The
* kernel and child process need to be notified.
*/
void kmscon_pty_resize(struct kmscon_pty *pty,
unsigned short width, unsigned short height);
#endif /* KMSCON_PTY_H */
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