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

/*  ntapi: Native API core library                      */

/*  Copyright (C) 2013--2016  Z. Gilboa                 */

/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */

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

#include <psxtypes/psxtypes.h>

#include <ntapi/nt_port.h>

#include <ntapi/nt_tty.h>

#include <ntapi/ntapi.h>

#include "ntapi_impl.h"

#include "ntapi_pty.h"

static int32_t __stdcall __ntapi_pty_read_write(

	nt_pty *		pty,

	void *			hevent,

	nt_io_apc_routine *	apc_routine,

	void *			apc_context,

	nt_iosb *		iosb,

	void *			buffer,

	size_t			nbytes,

	nt_large_integer *	offset,

	uint32_t *		key,

	int32_t			opcode)

{

	int32_t		status;

	nt_pty_io_msg	msg;

	off_t		soffset;

	int		mode;

	mode = opcode - NT_TTY_PTY_READ;

	soffset = mode * pty->section_size / 2;

	if (offset && offset->quad)

		return NT_STATUS_INVALID_PARAMETER;

	else if (__ntapi->tt_sync_block_lock(&pty->sync[mode],1,0,0))

		return NT_STATUS_RESOURCE_NOT_OWNED;

	nbytes = nbytes <= pty->section_size / 2

		? nbytes

		: pty->section_size / 2;

	__ntapi->tt_aligned_block_memset(

		&msg,0,sizeof(msg));

	msg.header.msg_type		= NT_LPC_NEW_MESSAGE;

	msg.header.data_size		= sizeof(msg.data);

	msg.header.msg_size		= sizeof(msg);

	msg.data.ttyinfo.opcode		= opcode;

	msg.data.ioinfo.hpty		= pty->hpty;

	msg.data.ioinfo.hevent		= hevent;

	msg.data.ioinfo.apc_routine	= apc_routine;

	msg.data.ioinfo.apc_context	= apc_context;

	msg.data.ioinfo.key		= key ? *key : 0;

	msg.data.ioinfo.luid.high	= pty->luid.high;

	msg.data.ioinfo.luid.low	= pty->luid.low;

	msg.data.ioinfo.riosb		= iosb;

	msg.data.ioinfo.raddr		= buffer;

	__ntapi->tt_guid_copy(

		&msg.data.ioinfo.guid,

		&pty->guid);

	msg.data.ioinfo.nbytes		= nbytes;

	msg.data.ioinfo.offset		= soffset;

	if (mode == __PTY_WRITE)

		__ntapi->tt_generic_memcpy(

			(char *)pty->section_addr + soffset,

			(char *)buffer,

			nbytes);

	if ((status = __ntapi->zw_request_wait_reply_port(pty->hport,&msg,&msg)))

		return status;

	else if (msg.data.ttyinfo.status)

		return msg.data.ttyinfo.status;

	if (mode == __PTY_READ)

		__ntapi->tt_generic_memcpy(

			(char *)buffer,

			(char *)pty->section_addr + soffset,

			msg.data.ioinfo.iosb.info);

	iosb->info   = msg.data.ioinfo.iosb.info;

	iosb->status = msg.data.ioinfo.iosb.status;

	return NT_STATUS_SUCCESS;

}

int32_t	__stdcall __ntapi_pty_read(

	__in	nt_pty *		pty,

	__in	void *			hevent		__optional,

	__in	nt_io_apc_routine *	apc_routine	__optional,

	__in	void *			apc_context	__optional,

	__out	nt_iosb *		iosb,

	__out	void *			buffer,

	__in	uint32_t		nbytes,

	__in	nt_large_integer *	offset		__optional,

	__in	uint32_t *		key		__optional)

{

	return __ntapi_pty_read_write(

		pty,

		hevent,apc_routine,apc_context,

		iosb,buffer,nbytes,offset,key,

		NT_TTY_PTY_READ);

}

int32_t __stdcall __ntapi_pty_write(

	__in	nt_pty *		pty,

	__in 	void *			hevent		__optional,

	__in	nt_io_apc_routine *	apc_routine	__optional,

	__in	void * 			apc_context	__optional,

	__out	nt_iosb *		iosb,

	__in	void * 			buffer,

	__in	uint32_t		nbytes,

	__in	nt_large_integer *	offset		__optional,

	__in	uint32_t *		key		__optional)

{

	return __ntapi_pty_read_write(

		pty,

		hevent,apc_routine,apc_context,

		iosb,buffer,nbytes,offset,key,

		NT_TTY_PTY_WRITE);

}