From 1c622005c289ef1cd9feea277bd0ff46b19d15f0 Mon Sep 17 00:00:00 2001
From: mrb0nk500 <b0nk@b0nk.xyz>
Date: Sun, 3 May 2020 15:51:57 -0400
Subject: Put the instruction, and I/O routines into separate functions.

I did this to make it more readable, while still
making it fast, due to inlining it.
---
 io.c | 181 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 181 insertions(+)
 create mode 100644 io.c

(limited to 'io.c')

diff --git a/io.c b/io.c
new file mode 100644
index 0000000..fcef5d9
--- /dev/null
+++ b/io.c
@@ -0,0 +1,181 @@
+#include "sux.h"
+
+uint8_t iscol;
+uint8_t idx = 3;
+uint8_t bcd[4];
+
+void io(uint64_t address, uint8_t *esc) {
+	int x, y;
+	uint16_t scr_col = 0;
+	switch (address) {
+		case CTRL_ADDR:
+			kbd_rdy = 1;
+			pthread_mutex_lock(&main_mutex);
+			pthread_cond_signal(&main_cond);
+			pthread_mutex_unlock(&main_mutex);
+			#if !keypoll
+			pthread_mutex_lock(&mutex);
+			pthread_cond_wait(&cond, &mutex);
+			pthread_mutex_unlock(&mutex);
+			#endif
+			kbd_rdy = 0;
+			break;
+		case TX_ADDR:
+			#if debug
+			if (!subdbg) {
+				scr_col = (addr[TX_ADDR] != 0x0C && addr[TX_ADDR] != '\n' && scr_col < 160) ? (addr[1] << 1)-2 : 0;
+				wmove(scr, 28, scr_col);
+			}
+			#endif
+			if (*esc) {
+				#if debug
+				if (!subdbg && addr[RX_ADDR] == '\n') {
+					wclrtoeol(scr);
+				}
+				#endif
+				switch (addr[TX_ADDR]) {
+					case 'A':
+						if (y > 0)
+							y--;
+						#if !debug
+						wmove(scr, y, x);
+						#endif
+						*esc = 0;
+						break;
+					case 'B':
+						if (y < getmaxy(scr))
+							y++;
+						#if !debug
+						wmove(scr, y, x);
+						#endif
+						*esc = 0;
+						break;
+					case 'C':
+						if (x < getmaxx(scr))
+							x++;
+						#if !debug
+						wmove(scr, y, x);
+						#endif
+						*esc = 0;
+						break;
+					case 'D':
+						if (x > 0)
+							x--;
+						#if !debug
+						wmove(scr, y, x);
+						#endif
+						*esc = 0;
+						break;
+					case 'H':
+						if (!bcd[2] && !bcd[3]) {
+							y = 0;
+						} else {
+							y = ((bcd[3]*10) + bcd[2]);
+						}
+						if (!bcd[0] && !bcd[1]) {
+							x = 0;
+						} else {
+							x = ((bcd[1]*10) + bcd[0]);
+						}
+						#if !debug
+						wmove(scr, y, x);
+						#else
+						mvwprintw(scr, 30, 0, "x: %i, y: %i  ", x, y);
+						/*mvwprintw(scr, 31, 0, "bcd[3-2]: {%u, %u}, bcd[1-0]: {%u, %u}", bcd[3], bcd[2], bcd[1], bcd[0]);*/
+						#endif
+						idx = 3;
+						bcd[0] = 0;
+						bcd[1] = 0;
+						bcd[2] = 0;
+						bcd[3] = 0;
+						*esc = 0;
+						break;
+					case 'S':
+						#if !debug
+						wscrl(scr, -1);
+						#else
+						#endif
+						*esc = 0;
+						break;
+					case 'T':
+						#if !debug
+						wscrl(scr, 1);
+						#else
+						#endif
+						*esc = 0;
+						break;
+					case '0':
+					case '1':
+					case '2':
+					case '3':
+					case '4':
+					case '5':
+					case '6':
+					case '7':
+					case '8':
+					case '9':
+						bcd[idx--] = (addr[address] - '0');
+						break;
+					default:
+						iscol = (addr[address] == ';');
+						break;
+				}
+			} else {
+				switch (addr[TX_ADDR]) {
+					case 0xC:
+						x=0,y=0;
+						#if !debug
+						wclear(scr);
+						wmove(scr, y, x);
+						#endif
+						break;
+					case CURSES_BACKSPACE:
+					case '\b':
+						if (x > 0) {
+							x--;
+							#if !debug
+							wmove(scr, y, x);
+							#endif
+						}
+						#if !debug
+						wdelch(scr);
+						#else
+						if (!subdbg) {
+							scr_col++;
+							wmove(scr, 28, scr_col--);
+							wdelch(scr);
+							wmove(scr, 28, scr_col);
+							wdelch(scr);
+						}
+						#endif
+						break;
+					case '\033':
+						*esc = 1;
+						break;
+					case '\n':
+						x = 0;
+						y+=1;
+						#if !debug
+						wmove(scr, y, x);
+						#endif
+						break;
+					default:
+						#if !debug
+						/*wmove(scr, y, x);*/
+						waddch(scr, addr[address]);
+						#else
+						if (!subdbg && scr_col < 160) {
+							if (addr[address] != ' ') {
+								wprintw(scr, "%02X", addr[address]);
+							} else {
+								wprintw(scr, "  ");
+							}
+						}
+						#endif
+						x+=1;
+						break;
+				}
+			}
+			break;
+	}
+}
-- 
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