/*
 * Copyright (c) 2016 Daniel Boland <dboland@xs4all.nl>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the copyright holders nor the names of its 
 *    contributors may be used to endorse or promote products derived 
 *    from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR CONTRIBUTORS 
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 */

#include <winbase.h>

/****************************************************/

BOOL 
pty_poll(WIN_DEVICE *Device, WIN_POLLFD *Info, DWORD *Result)
{
	BOOL bResult = TRUE;
	SHORT sResult = WIN_POLLERR;
	SHORT sMask = Info->Events | WIN_POLLIGNORE;
	DWORD dwSize = 0;
	DWORD dwCount = 0;

	if (!GetMailslotInfo(Device->Input, NULL, &dwSize, &dwCount, NULL)){
		bResult = FALSE;
	}else if (dwSize == MAILSLOT_NO_MESSAGE){
		sResult = WIN_POLLOUT;
	}else if (dwSize){
		sResult = WIN_POLLOUT | WIN_POLLIN;
	}else{
		sResult = 0;
	}
	if (Info->Result = sMask & sResult){
		*Result += 1;
	}
	return(bResult);
}
BOOL 
pty_read(WIN_DEVICE *Device, LPSTR Buffer, DWORD Size, DWORD *Result)
{
	BOOL bResult = FALSE;
	OVERLAPPED ovl = {0, 0, 0, 0, Device->Event};

	if (ReadFile(Device->Input, Buffer, Size, Result, &ovl)){
		bResult = TRUE;
	}
	return(bResult);
}
BOOL 
pty_write(WIN_DEVICE *Device, LPCSTR Buffer, DWORD Size, DWORD *Result)
{
	BOOL bResult = FALSE;
	OVERLAPPED ovl = {0, 0, 0, 0, Device->Event};

	if (WriteFile(Device->Output, Buffer, Size, Result, &ovl)){
		bResult = TRUE;
	}
	return(bResult);
}
BOOL 
pty_revoke(WIN_TTY *Terminal, WIN_DEVICE *Device)
{
	BOOL bResult = FALSE;

	if (!CloseHandle(Terminal->Output)){
		WIN_ERR("CloseHandle(%d): %s\n", Terminal->Output, win_strerror(GetLastError()));
	}else if (!CloseHandle(Terminal->Input)){
		WIN_ERR("CloseHandle(%d): %s\n", Terminal->Input, win_strerror(GetLastError()));
	}else{
		ZeroMemory(Terminal, sizeof(WIN_TTY));
		Device->FSType = FS_TYPE_PDO;
		Device->Flags = 0;
		bResult = TRUE;
	}
	return(bResult);
}