/****************************************************************
 *								*
 *	Copyright 2001, 2012 Fidelity Information Services, Inc	*
 *								*
 *	This source code contains the intellectual property	*
 *	of its copyright holder(s), and is made available	*
 *	under a license.  If you do not know the terms of	*
 *	the license, please stop and do not read further.	*
 *								*
 ****************************************************************/

#include "mdef.h"

#include <sys/ioctl.h>
#include <errno.h>
#include "gtm_fcntl.h"
#include <signal.h>
#include "gtm_string.h"
#include "gtm_iconv.h"
#include "gtm_termios.h"
#include "gtm_unistd.h"

#include "io_params.h"
#include "io.h"
#include "iottdef.h"
#include "iosp.h"
#include "trmdef.h"
#include "nametabtyp.h"
#include "copy.h"
#include "gtmio.h"
#include "eintr_wrappers.h"
#include "stringpool.h"
#include "send_msg.h"
#include "namelook.h"
#include "error.h"
#include "gtm_tputs.h"
#include "gtm_tparm.h"

LITDEF nametabent filter_names[] =
{
	{4, "CHAR*"},
	{3, "ESC*"},
	{6, "NOCHAR*"},
	{5, "NOESC*"}
};
LITDEF unsigned char filter_index[27] =
{
	0, 0, 0, 1, 1, 2, 2, 2, 2, 2, 2, 2
	,2, 2, 4, 4, 4, 4, 4, 4, 4, 4, 4
	,4, 4, 4
};

GBLREF bool		ctrlc_on;
GBLREF char		*CURSOR_ADDRESS, *CLR_EOL, *CLR_EOS;
GBLREF io_pair		io_std_device;
GBLREF io_pair		io_curr_device;
GBLREF bool		prin_out_dev_failure;
GBLREF void 		(*ctrlc_handler_ptr)();
GBLREF	boolean_t	dollar_zininterrupt;

LITREF unsigned char	io_params_size[];

error_def(ERR_DEVPARMNEG);
error_def(ERR_NOPRINCIO);
error_def(ERR_SYSCALL);
error_def(ERR_TCGETATTR);
error_def(ERR_TCSETATTR);
error_def(ERR_TTINVFILTER);
error_def(ERR_WIDTHTOOSMALL);
error_def(ERR_ZINTRECURSEIO);

void iott_use(io_desc *iod, mval *pp)
{
	boolean_t	flush_input;
	char		dc1;
	int		fil_type;
	unsigned char	ch, len;
	int4		length, width;
	uint4		mask_in;
	d_tt_struct	*temp_ptr, *tt_ptr;
	io_desc		*d_in, *d_out;
	io_termmask	mask_term;
	char		*ttab;
	struct termios	t;
	int		status;
	int		save_errno;
	int		p_offset;

	p_offset = 0;
	assert(iod->state == dev_open);
	iott_flush(iod);
	tt_ptr = (d_tt_struct *)iod->dev_sp;
	if (*(pp->str.addr + p_offset) != iop_eol)
	{
		if (tt_ptr->mupintr)
			if (dollar_zininterrupt)
				rts_error(VARLSTCNT(1) ERR_ZINTRECURSEIO);
			else
			{	/* The interrupted read was not properly resumed so clear it now */
				tt_ptr->mupintr = FALSE;
				tt_ptr->tt_state_save.who_saved = ttwhichinvalid;
				io_find_mvstent(iod, TRUE);
			}
		status = tcgetattr(tt_ptr->fildes, &t);
		if (0 != status)
		{
			save_errno = errno;
			if (io_curr_device.out == io_std_device.out)
                        {
                                if (!prin_out_dev_failure)
                                        prin_out_dev_failure = TRUE;
                                else
                                {
                                        send_msg(VARLSTCNT(1) ERR_NOPRINCIO);
                                        stop_image_no_core();
                                }
                        }
                        rts_error(VARLSTCNT(4) ERR_TCGETATTR, 1, tt_ptr->fildes, save_errno);
		}
		flush_input = FALSE;
		d_in = iod->pair.in;
		d_out = iod->pair.out;
		temp_ptr = (d_tt_struct *)d_in->dev_sp;
		mask_in = temp_ptr->term_ctrl;
		mask_term = temp_ptr->mask_term;
		while (*(pp->str.addr + p_offset) != iop_eol)
		{
			switch (ch = *(pp->str.addr + p_offset++))
			{
				case iop_canonical:
					tt_ptr->canonical = TRUE;
					t.c_lflag |= ICANON;
					break;
				case iop_nocanonical:
					tt_ptr->canonical = FALSE;
					t.c_lflag &= ~(ICANON);
					break;
				case iop_cenable:
					temp_ptr = (d_tt_struct *)io_std_device.in->dev_sp;
					if (tt_ptr->fildes == temp_ptr->fildes && !ctrlc_on)
					{
						struct sigaction act;

						sigemptyset(&act.sa_mask);
						act.sa_flags = 0;
						act.sa_handler = ctrlc_handler_ptr;
						sigaction(SIGINT, &act, 0);
						ctrlc_on = TRUE;
					}
					break;
				case iop_nocenable:
					temp_ptr = (d_tt_struct *)io_std_device.in->dev_sp;
					if (tt_ptr->fildes == temp_ptr->fildes && ctrlc_on)
					{
						struct sigaction act;

						sigemptyset(&act.sa_mask);
						act.sa_flags = 0;
						act.sa_handler = SIG_IGN;
						sigaction(SIGINT, &act, 0);
						ctrlc_on = FALSE;
					}
					break;
				case iop_clearscreen:
					gtm_tputs(CLR_EOS, 1, outc);
					break;
				case iop_convert:
					mask_in |= TRM_CONVERT;
					break;
				case iop_noconvert:
					mask_in &= ~TRM_CONVERT;
					break;
				case iop_ctrap:
					GET_LONG(tt_ptr->enbld_outofbands.mask, pp->str.addr + p_offset);
					break;
				case iop_downscroll:
					if (d_out->dollar.y > 0)
					{
						d_out->dollar.y--;
						gtm_tputs(gtm_tparm(CURSOR_ADDRESS, d_out->dollar.y, d_out->dollar.x), 1, outc);
					}
					break;
				case iop_echo:
					mask_in &= (~TRM_NOECHO);
					break;
				case iop_noecho:
					mask_in |= TRM_NOECHO;
					break;
				case iop_editing:
					if (io_curr_device.in == io_std_device.in)
					{	/* $PRINCIPAL only */
						tt_ptr->ext_cap |= TT_EDITING;
						if (!tt_ptr->recall_buff.addr)
						{
							assert(tt_ptr->in_buf_sz);
							tt_ptr->recall_buff.addr = malloc(tt_ptr->in_buf_sz);
							tt_ptr->recall_size = tt_ptr->in_buf_sz;
							tt_ptr->recall_buff.len = 0;    /* nothing in buffer */
						}
					}
					break;
				case iop_noediting:
					if (io_curr_device.in == io_std_device.in)
						tt_ptr->ext_cap &= ~TT_EDITING;	/* $PRINCIPAL only */
					break;
				case iop_escape:
					mask_in |= TRM_ESCAPE;
					break;
				case iop_noescape:
					mask_in &= (~TRM_ESCAPE);
					default:
					break;
				case iop_eraseline:
					gtm_tputs(CLR_EOL, 1, outc);
					break;
				case iop_exception:
					iod->error_handler.len = *(pp->str.addr + p_offset);
					iod->error_handler.addr = (char *)(pp->str.addr + p_offset + 1);
					s2pool(&iod->error_handler);
					break;
				case iop_filter:
					len = *(pp->str.addr + p_offset);
					ttab = pp->str.addr + p_offset + 1;
					if ((fil_type = namelook(filter_index, filter_names, ttab, len)) < 0)
					{
						rts_error(VARLSTCNT(1) ERR_TTINVFILTER);
						return;
					}
					switch (fil_type)
					{
					case 0:
						iod->write_filter |= CHAR_FILTER;
						break;
					case 1:
						iod->write_filter |= ESC1;
						break;
					case 2:
						iod->write_filter &= ~CHAR_FILTER;
						break;
					case 3:
						iod->write_filter &= ~ESC1;
						break;
					}
					break;
				case iop_nofilter:
					iod->write_filter = 0;
					break;
				case iop_flush:
					flush_input = TRUE;
					break;
				case iop_hostsync:
					t.c_iflag |= IXOFF;
					break;
				case iop_nohostsync:
					t.c_iflag &= ~IXOFF;
					break;
				case iop_insert:
					if (io_curr_device.in == io_std_device.in)
						tt_ptr->ext_cap &= ~TT_NOINSERT;	/* $PRINCIPAL only */
					break;
				case iop_noinsert:
					if (io_curr_device.in == io_std_device.in)
						tt_ptr->ext_cap |= TT_NOINSERT;	/* $PRINCIPAL only */
					break;
				case iop_length:
					GET_LONG(length, pp->str.addr + p_offset);
					if (0 > length)
						rts_error(VARLSTCNT(1) ERR_DEVPARMNEG);
					d_out->length = length;
					break;
				case iop_pasthru:
					mask_in |= TRM_PASTHRU;
					break;
				case iop_nopasthru:
					mask_in &= (~TRM_PASTHRU);
					break;
				case iop_readsync:
					mask_in |= TRM_READSYNC;
					break;
				case iop_noreadsync:
					dc1 = (char)17;
					temp_ptr = (d_tt_struct *)io_std_device.in->dev_sp;
					DOWRITERC(temp_ptr->fildes, &dc1, 1, status);
					if (0 != status)
						rts_error(VARLSTCNT(1) status);
					mask_in &= (~TRM_READSYNC);
					break;
				case iop_terminator:
					memcpy(&mask_term.mask[0], (pp->str.addr + p_offset), SIZEOF(io_termmask));
					temp_ptr = (d_tt_struct *)d_in->dev_sp;
					if (mask_term.mask[0] == NUL &&
						mask_term.mask[1] == NUL &&
						mask_term.mask[2] == NUL &&
						mask_term.mask[3] == NUL &&
						mask_term.mask[4] == NUL &&
						mask_term.mask[5] == NUL &&
						mask_term.mask[6] == NUL &&
						mask_term.mask[7] == NUL)
					{
						temp_ptr->default_mask_term = TRUE;
						if (CHSET_UTF8 == d_in->ichset)
						{
							mask_term.mask[0] = TERM_MSK_UTF8_0;
							mask_term.mask[4] = TERM_MSK_UTF8_4;
						} else
							mask_term.mask[0] = TERM_MSK;
					} else
						temp_ptr->default_mask_term = FALSE;
						break;
				case iop_noterminator:
					temp_ptr = (d_tt_struct *)d_in->dev_sp;
					temp_ptr->default_mask_term = FALSE;
					memset(&mask_term.mask[0], 0, SIZEOF(io_termmask));
					break;
				case iop_ttsync:
					t.c_iflag |= IXON;
					break;
				case iop_nottsync:
					t.c_iflag &= ~IXON;
					break;
				case iop_typeahead:
					mask_in &= (~TRM_NOTYPEAHD);
					break;
				case iop_notypeahead:
					mask_in |= TRM_NOTYPEAHD;
					break;
				case iop_upscroll:
					d_out->dollar.y++;
					if (d_out->length)
						d_out->dollar.y %= d_out->length;
					gtm_tputs(gtm_tparm(CURSOR_ADDRESS, d_out->dollar.y, d_out->dollar.x), 1, outc);
					break;
				case iop_width:
					GET_LONG(width, pp->str.addr + p_offset);
					if (0 > width)
						rts_error(VARLSTCNT(1) ERR_DEVPARMNEG);
					/* Do not allow a WIDTH of 1 if UTF mode (ICHSET or OCHSET is not M) */
					if ((1 == width) && ((CHSET_M != d_in->ochset) || (CHSET_M != d_in->ichset)))
						rts_error(VARLSTCNT(1) ERR_WIDTHTOOSMALL);
					if (0 == width)
					{
						d_out->wrap = FALSE;
						d_out->width = TTDEF_PG_WIDTH;
					} else
					{
						d_out->width = width;
						d_out->wrap = TRUE;
					}
					break;
				case iop_wrap:
					d_out->wrap = TRUE;
					break;
				case iop_nowrap:
					d_out->wrap = FALSE;
					break;
				case iop_x:
					GET_LONG(d_out->dollar.x, pp->str.addr + p_offset);
					if (0 > (int4)d_out->dollar.x)
						d_out->dollar.x = 0;
					if (d_out->dollar.x > d_out->width && d_out->wrap)
					{
						d_out->dollar.y += (d_out->dollar.x / d_out->width);
						if (d_out->length)
							d_out->dollar.y %= d_out->length;
						d_out->dollar.x	%= d_out->width;
					}
					gtm_tputs(gtm_tparm(CURSOR_ADDRESS, d_out->dollar.y, d_out->dollar.x), 1, outc);
					break;
				case iop_y:
					GET_LONG(d_out->dollar.y, pp->str.addr + p_offset);
					if (0 > (int4)d_out->dollar.y)
						d_out->dollar.y = 0;
					if (d_out->length)
						d_out->dollar.y %= d_out->length;
					gtm_tputs(gtm_tparm(CURSOR_ADDRESS, d_out->dollar.y, d_out->dollar.x), 1, outc);
					break;
				case iop_ipchset:
					{
#ifdef KEEP_zOS_EBCDIC
						if ( (iconv_t)0 != iod->input_conv_cd )
						{
							ICONV_CLOSE_CD(iod->input_conv_cd);
						}
						SET_CODE_SET(iod->in_code_set, (char *)(pp->str.addr + p_offset + 1));
						if (DEFAULT_CODE_SET != iod->in_code_set)
							ICONV_OPEN_CD(iod->input_conv_cd,
								(char *)(pp->str.addr + p_offset + 1), INSIDE_CH_SET);
#endif
                                        	break;
					}
                                case iop_opchset:
					{
#ifdef KEEP_zOS_EBCDIC
						if ( (iconv_t)0 != iod->output_conv_cd)
						{
							ICONV_CLOSE_CD(iod->output_conv_cd);
						}
						SET_CODE_SET(iod->out_code_set, (char *)(pp->str.addr + p_offset + 1));
						if (DEFAULT_CODE_SET != iod->out_code_set)
							ICONV_OPEN_CD(iod->output_conv_cd, INSIDE_CH_SET,
								(char *)(pp->str.addr + p_offset + 1));
#endif
                                        	break;
					}
			}
			p_offset += ((IOP_VAR_SIZE == io_params_size[ch]) ?
				(unsigned char)*(pp->str.addr + p_offset) + 1 : io_params_size[ch]);
		}
		temp_ptr = (d_tt_struct *)d_in->dev_sp;
		Tcsetattr(tt_ptr->fildes, TCSANOW, &t, status);
		if (0 != status)
			rts_error(VARLSTCNT(3) ERR_TCSETATTR, tt_ptr->fildes, errno);
		temp_ptr->term_ctrl = mask_in;
		memcpy(&temp_ptr->mask_term, &mask_term, SIZEOF(io_termmask));
		if (flush_input)
		{
			TCFLUSH(tt_ptr->fildes, TCIFLUSH, status);
			if (0 != status)
				rts_error(VARLSTCNT(8) ERR_SYSCALL, 5, LIT_AND_LEN("tcflush input"),
					CALLFROM, errno);
		}
	} else if (tt_ptr->mupintr && !dollar_zininterrupt)
	{	/* The interrupted read was not properly resumed so clear it now */
		tt_ptr->mupintr = FALSE;
		tt_ptr->tt_state_save.who_saved = ttwhichinvalid;
		io_find_mvstent(iod, TRUE);	/* clear mv stack entry */
	}
	return;
}

