/*********************************************************/
/*  ptycon: a pty-console bridge                         */
/*  Copyright (C) 2016--2017  SysDeer Technologies, LLC  */
/*  Released under GPLv2 and GPLv3; see COPYING.PTYCON.  */
/*********************************************************/

#include <psxtypes/psxtypes.h>

#include <ptycon/ptycon.h>
#include "ptycon_bridge_impl.h"

/* forward declarations */
static ptyc_term_handler	esi_illegal_code;
static ptyc_term_handler	esi_left_bracket;
static ptyc_term_handler	esi_right_bracket;
static ptyc_term_handler	esi_left_parenthesis;
static ptyc_term_handler	esi_right_parenthesis;

ptyc_term_handler * const ptyc_esi_handlers[PTYC_ESI_ARRAY_SIZE] = {
	esi_illegal_code,		/* 0x00 */
	esi_illegal_code,		/* 0x01 */
	esi_illegal_code,		/* 0x02 */
	esi_illegal_code,		/* 0x03 */
	esi_illegal_code,		/* 0x04 */
	esi_illegal_code,		/* 0x05 */
	esi_illegal_code,		/* 0x06 */
	esi_illegal_code,		/* 0x07 */
	esi_illegal_code,		/* 0x08 */
	esi_illegal_code,		/* 0x09 */
	esi_illegal_code,		/* 0x0a */
	esi_illegal_code,		/* 0x0b */
	esi_illegal_code,		/* 0x0c */
	esi_illegal_code,		/* 0x0d */
	esi_illegal_code,		/* 0x0e */
	esi_illegal_code,		/* 0x0f */
	esi_illegal_code,		/* 0x10 */
	esi_illegal_code,		/* 0x11 */
	esi_illegal_code,		/* 0x12 */
	esi_illegal_code,		/* 0x13 */
	esi_illegal_code,		/* 0x14 */
	esi_illegal_code,		/* 0x15 */
	esi_illegal_code,		/* 0x16 */
	esi_illegal_code,		/* 0x17 */
	esi_illegal_code,		/* 0x18 */
	esi_illegal_code,		/* 0x19 */
	esi_illegal_code,		/* 0x1a */
	esi_illegal_code,		/* 0x1b */
	esi_illegal_code,		/* 0x1c */
	esi_illegal_code,		/* 0x1d */
	esi_illegal_code,		/* 0x1e */
	esi_illegal_code,		/* 0x1f */
	esi_illegal_code,		/* 0x20 */
	esi_illegal_code,		/* 0x21 */
	esi_illegal_code,		/* 0x22 */
	esi_illegal_code,		/* 0x23 */
	esi_illegal_code,		/* 0x24 */
	esi_illegal_code,		/* 0x25 */
	esi_illegal_code,		/* 0x26 */
	esi_illegal_code,		/* 0x27 */
	esi_left_parenthesis,		/* 0x28 */	/* TODO: */
	esi_right_parenthesis,		/* 0x29 */	/* TODO: */
	esi_illegal_code,		/* 0x2a */
	esi_illegal_code,		/* 0x2b */
	esi_illegal_code,		/* 0x2c */
	esi_illegal_code,		/* 0x2d */
	esi_illegal_code,		/* 0x2e */
	esi_illegal_code,		/* 0x2f */
	esi_illegal_code,		/* 0x30 */
	esi_illegal_code,		/* 0x31 */
	esi_illegal_code,		/* 0x32 */
	esi_illegal_code,		/* 0x33 */
	esi_illegal_code,		/* 0x34 */
	esi_illegal_code,		/* 0x35 */
	esi_illegal_code,		/* 0x36 */
	esi_illegal_code,		/* 0x37 */
	esi_illegal_code,		/* 0x38 */
	esi_illegal_code,		/* 0x39 */
	esi_illegal_code,		/* 0x3a */
	esi_illegal_code,		/* 0x3b */
	esi_illegal_code,		/* 0x3c */
	esi_illegal_code,		/* 0x3d */
	esi_illegal_code,		/* 0x3e */
	esi_illegal_code,		/* 0x3f */
	esi_illegal_code,		/* 0x40 */
	esi_illegal_code,		/* 0x41 */
	esi_illegal_code,		/* 0x42 */
	esi_illegal_code,		/* 0x43 */
	esi_illegal_code,		/* 0x44 */
	esi_illegal_code,		/* 0x45 */
	esi_illegal_code,		/* 0x46 */
	esi_illegal_code,		/* 0x47 */
	esi_illegal_code,		/* 0x48 */
	esi_illegal_code,		/* 0x49 */
	esi_illegal_code,		/* 0x4a */
	esi_illegal_code,		/* 0x4b */
	esi_illegal_code,		/* 0x4c */
	esi_illegal_code,		/* 0x4d */
	esi_illegal_code,		/* 0x4e */
	esi_illegal_code,		/* 0x4f */
	esi_illegal_code,		/* 0x50 */
	esi_illegal_code,		/* 0x51 */
	esi_illegal_code,		/* 0x52 */
	esi_illegal_code,		/* 0x53 */
	esi_illegal_code,		/* 0x54 */
	esi_illegal_code,		/* 0x55 */
	esi_illegal_code,		/* 0x56 */
	esi_illegal_code,		/* 0x57 */
	esi_illegal_code,		/* 0x58 */
	esi_illegal_code,		/* 0x59 */
	esi_illegal_code,		/* 0x5a */
	esi_left_bracket,		/* 0x5b */	/* CSI */
	esi_illegal_code,		/* 0x5c */
	esi_right_bracket,		/* 0x5d */	/* TODO: */
	esi_illegal_code		/* 0x5e */
};


static void * __fastcall esi_illegal_code(struct ptyc_term_ctx * tctx)
{
	/* defer to the screen handler routine */
	return tctx->char_handler;
}


static void * __fastcall esi_select(
	struct ptyc_term_ctx *		tctx,
	ptyc_term_handler * const *	handlers,
	unsigned int			ctrl_cap)
{
	/* set state to param handlers */
	tctx->ctrl_state = PTYC_CTRL_STATE_PARAM_HANDLERS;

	/* select param handler array */
	tctx->ctrl_handlers[tctx->ctrl_state] = handlers;
	tctx->ctrl_cap = ctrl_cap;

	/* prepare to read the first ctrl param */
	tctx->ctrl_param     = tctx->ctrl_params;
	tctx->ctrl_params[0] = 0;

	/* advance the stream pointer */
	tctx->wch_pty++;

	/* retain mode */
	return tctx->ctrl_handler;
}


static void * __fastcall esi_left_bracket(struct ptyc_term_ctx * tctx)
{
	return esi_select(tctx,ptyc_csi_handlers,PTYC_CSI_ARRAY_SIZE);
}


static void * __fastcall esi_right_bracket(struct ptyc_term_ctx * tctx)
{
	/* todo: */
	return esi_illegal_code(tctx);
}


static void * __fastcall esi_left_parenthesis(struct ptyc_term_ctx * tctx)
{
	/* todo: */
	return esi_illegal_code(tctx);
}


static void * __fastcall esi_right_parenthesis(struct ptyc_term_ctx * tctx)
{
	/* todo: */
	return esi_illegal_code(tctx);
}