From 0cfbf253c980495553c83ec3321215e91ee9daf8 Mon Sep 17 00:00:00 2001
From: "(Tim) Efthimis Kritikos" <efkf@firemail.cc>
Date: Fri, 26 Jan 2024 16:11:57 +0000
Subject: [PATCH] GUI: Added stack window

---
 gui.c     | 81 +++++++++++++++++++++++++++++++++++++++++++++++++++++--
 simdata.c |  1 +
 simdata.h |  1 +
 3 files changed, 81 insertions(+), 2 deletions(-)

diff --git a/gui.c b/gui.c
index 412bd19..fae82df 100644
--- a/gui.c
+++ b/gui.c
@@ -21,11 +21,14 @@
 #include <string.h>
 #include "simdata.h"
 
+#define GENERAL_STACK_MAX_WIDTH 16
+
 int terminal_width;
 int terminal_height;
 
 WINDOW *tabs;
 WINDOW *general_memdump;
+WINDOW *general_stack;
 
 int monochrome;
 
@@ -45,6 +48,8 @@ int gui_ncurses_refresh(){
 		return 1;
 	if(wrefresh(general_memdump)==ERR)
 		return 1;
+	if(wrefresh(general_stack)==ERR)
+		return 1;
 	return 0;
 }
 
@@ -56,6 +61,7 @@ enum CPU_STATE_t CPU_STATE=SINGLE_STEPPING;
 //enum CPU_STATE_t CPU_STATE=STOPPED;
 
 void update_tabs(){
+	wattron(tabs,A_BOLD);
 	wattron(tabs,COLOR_PAIR(2));
 	for(int i=0;i<terminal_width;i++)
 		mvwprintw(tabs,0,i," ");
@@ -70,9 +76,12 @@ void update_tabs(){
 		x+=2;
 		if(i==CURRENT_TAB)
 			wattron(tabs,COLOR_PAIR(3));
-		else
+		else{
 			wattron(tabs,COLOR_PAIR(2));
+			wattroff(tabs,A_BOLD);
+		}
 		mvwprintw(tabs,0,x," %s ",tab_name[i]);
+		wattron(tabs,A_BOLD);
 		x+=strlen(tab_name[i])+2+3;
 	}
 	switch(CPU_STATE){
@@ -117,7 +126,15 @@ 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();
-	general_memdump=newwin(terminal_height*0.8,terminal_width/2,4,5);
+	int x=4;
+	general_memdump=newwin(terminal_height*0.8,terminal_width/2,x,5);
+	x+=terminal_width/2;
+
+	x+=3;
+	int 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;
+
 	if(gui_ncurses_refresh())
 		return 1;
 	return 0;
@@ -139,6 +156,64 @@ int gui_error(char *str){
 		wattroff(error_win,COLOR_PAIR(1));
 }
 
+int update_general_stack(struct simdata_t *simdata){
+	int width,height;
+	getmaxyx(general_stack,height,width);
+	box(general_stack, 0 , 0);
+	mvwprintw(general_stack,0,width/2-4,"[ STACK ]");
+	if(width<13){
+		mvwprintw(general_stack,1,1,"too small window");
+	}else{
+		// Calculate config based on window size
+		int offset_data,offset_arrow;
+		if(width<14){
+			offset_data=3;
+			offset_arrow=2;
+		}else{
+			offset_data=5;
+			offset_arrow=3;
+		}
+
+		// draw data
+		uint32_t ADDRESS=(simdata->SP-(height/2-2)*4)&0x00FFFFFF;
+
+		for(int i=0;i<height-4;i++){
+			if(ADDRESS==simdata->SP)
+				wattron(general_stack,A_BOLD);
+			mvwprintw(general_stack,i+2,offset_data,"%08X",*(uint32_t*)(simdata->RAM+ADDRESS));
+			if(ADDRESS==simdata->SP)
+				wattroff(general_stack,A_BOLD);
+			ADDRESS=(ADDRESS+4)&0xFFFFFF;
+		}
+
+		// draw graphics
+		mvwaddch(general_stack,height/4-2,offset_arrow-1,ACS_UARROW);
+		mvwaddch(general_stack,height/4-1,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_stack,height/4  ,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_stack,height/4+1,offset_arrow-1,ACS_VLINE);
+		if(offset_arrow!=2)
+			mvwprintw(general_stack,height/4+2,1,"(+)");
+		else
+			mvwprintw(general_stack,height/4+2,offset_arrow-1,"+");
+
+
+		mvwaddch(general_stack,height/2,offset_arrow,ACS_RARROW);
+		mvwaddch(general_stack,height/2,offset_arrow-1,ACS_ULCORNER);
+
+		mvwaddch(general_stack,height/2+1,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_stack,height/2+2,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_stack,height/2+3,offset_arrow-1,ACS_VLINE);
+		mvwaddch(general_stack,height/2+4,offset_arrow-1,'S');
+		if(offset_arrow==2)
+			mvwaddch(general_stack,height/2+5,offset_arrow-1,'P');
+		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){
 	int width,height;
 	getmaxyx(general_memdump,height,width);
@@ -174,6 +249,8 @@ int update_gui(struct simdata_t *simdata){
 	update_tabs();
 	if(update_general_memdump(simdata))
 		return 1;
+	if(update_general_stack(simdata))
+		return 1;
 	if(gui_ncurses_refresh())
 		return 1;
 	return 0;
diff --git a/simdata.c b/simdata.c
index 92e7b0f..c6bb695 100644
--- a/simdata.c
+++ b/simdata.c
@@ -37,6 +37,7 @@ struct simdata_t *init_simdata(){
 	}
 
 	ret->PC=0;
+	ret->SP=0;
 
 	return ret;
 }
diff --git a/simdata.h b/simdata.h
index 8761597..4a51d94 100644
--- a/simdata.h
+++ b/simdata.h
@@ -5,6 +5,7 @@ struct simdata_t{
 	long unsigned int current_clock;
 	uint8_t *RAM;
 	uint32_t PC;
+	uint32_t SP;
 };
 
 struct simdata_t *init_simdata();