GUI: Added disassembly window

Makefile

@@ -1,6 +1,6 @@
 all:first
 
-first:gui.o main.o simdata.o
+first:gui.o main.o simdata.o assembly.o
 	gcc -ggdb $^ -fsanitize=address -lncurses -ltinfo -o $@
 
 %.o:%.c
@@ -8,4 +8,4 @@ first:gui.o main.o simdata.o
 
 .PHONY: clean
 clean:
-	rm -f gui.o main.o simdata.o
+	rm -f gui.o main.o simdata.o  assembly.o

assembly.c

@@ -0,0 +1,17 @@
+#include "assembly.h"
+#include <string.h>
+#include <stdlib.h>
+
+
+// Max instruction width is 25 characters without the null char
+
+char *disassemble(uint32_t opcode){
+	char *ret=malloc(26);
+	if (!ret)
+		return NULL;
+	if(opcode!=0x01ABCDEF)
+		memcpy(ret,"placeholder",12);
+	else
+		memcpy(ret,"easter egg",11);
+	return ret;
+}

assembly.h

@@ -0,0 +1,3 @@
+#include "stdint.h"
+
+char* disassemble(uint32_t opcode);

gui.c

@@ -20,8 +20,11 @@
 #include <ncurses.h>
 #include <string.h>
 #include "simdata.h"
+#include "assembly.h"
+#include <stdlib.h>
 
 #define GENERAL_STACK_MAX_WIDTH 16
+#define GENERAL_DISAS_WIDTH 41
 
 int terminal_width;
 int terminal_height;
@@ -29,6 +32,7 @@ int terminal_height;
 WINDOW *tabs;
 WINDOW *general_memdump;
 WINDOW *general_stack;
+WINDOW *general_disas;
 
 int monochrome;
 
@@ -50,6 +54,8 @@ int gui_ncurses_refresh(){
 		return 1;
 	if(wrefresh(general_stack)==ERR)
 		return 1;
+	if(wrefresh(general_disas)==ERR)
+		return 1;
 	return 0;
 }
 
@@ -126,12 +132,19 @@ int start_gui(){
 	mvprintw((terminal_height-3)/2+3,terminal_width/2-15,"Initialising the simulator...");
 	tabs = newwin(1,terminal_width,0,0);
 	update_tabs();
+	int len;
 	int x=4;
 	general_memdump=newwin(terminal_height*0.8,terminal_width/2,x,5);
 	x+=terminal_width/2;
+	x++;
 
 	x+=3;
-	int len=(terminal_width/6)>GENERAL_STACK_MAX_WIDTH?GENERAL_STACK_MAX_WIDTH:(terminal_width/6);
+	len=(terminal_width/6)>GENERAL_DISAS_WIDTH?GENERAL_DISAS_WIDTH:(terminal_width/6);
+	general_disas=newwin(terminal_height*0.8,len,4,x);
+	x+=len;
+
+	x+=3;
+	len=(terminal_width/6)>GENERAL_STACK_MAX_WIDTH?GENERAL_STACK_MAX_WIDTH:(terminal_width/6);
 	general_stack=newwin(terminal_height*0.8,len,4,x);
 	x+=len;
 
@@ -156,6 +169,55 @@ int gui_error(char *str){
 		wattroff(error_win,COLOR_PAIR(1));
 }
 
+int update_general_disas(struct simdata_t *simdata){
+	int width,height;
+	getmaxyx(general_disas,height,width);
+	box(general_disas, 0 , 0);
+	int offset_arrow;
+	if(width<41)
+		offset_arrow=2;
+	else
+		offset_arrow=3;
+	mvwprintw(general_disas,0,width/2-7,"[ DISASSEMBLY ]");
+	if(width<18){
+		mvwprintw(general_disas,1,1,"too small window");
+	}else{
+		uint32_t ADDRESS=(simdata->PC-(height/2-2)*3)&0x00FFFFFF;
+		for (int i=2;i<height-2;i++){
+			int overall_offset=offset_arrow-2;
+
+			mvwaddch(general_disas,i,11+overall_offset,ACS_VLINE);
+
+			if(ADDRESS==simdata->PC)
+				wattron(general_disas,A_BOLD);
+			mvwprintw(general_disas,i,4+overall_offset,"%06X",ADDRESS);
+			char* disas=disassemble(*(uint32_t*)(simdata->RAM+ADDRESS));
+			int space_left=width-14-2+(overall_offset?0:1);
+			if(space_left<25)
+				disas[space_left+1]=0;
+			mvwprintw(general_disas,i,13+overall_offset,"%s",disas);
+			if(ADDRESS==simdata->PC)
+				wattroff(general_disas,A_BOLD);
+
+			ADDRESS=(ADDRESS+3)&0xFFFFFF;
+			free(disas);
+		}
+		mvwaddch(general_disas,height/2,offset_arrow,ACS_RARROW);
+		mvwaddch(general_disas,height/2,offset_arrow-1,ACS_ULCORNER);
+		mvwaddch(general_disas,height/2+1,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_disas,height/2+2,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_disas,height/2+3,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_disas,height/2+4,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_disas,height/2+5,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_disas,height/2+6,offset_arrow-1,'P');
+		if(offset_arrow==2)
+			mvwaddch(general_disas,height/2+7,offset_arrow-1,'C');
+		else
+			mvwaddch(general_disas,height/2+6,offset_arrow,'C');
+	}
+	return 0;
+}
+
 int update_general_stack(struct simdata_t *simdata){
 	int width,height;
 	getmaxyx(general_stack,height,width);
@@ -209,9 +271,7 @@ int update_general_stack(struct simdata_t *simdata){
 		else
 			mvwaddch(general_stack,height/2+4,offset_arrow,'P');
 	}
-	if(height!=1433241)
 	return 0;
-	return 1;
 }
 
 int update_general_memdump(struct simdata_t *simdata){
@@ -251,6 +311,8 @@ int update_gui(struct simdata_t *simdata){
 		return 1;
 	if(update_general_stack(simdata))
 		return 1;
+	if(update_general_disas(simdata))
+		return 1;
 	if(gui_ncurses_refresh())
 		return 1;
 	return 0;