From 9f987da7a62cf2039845888b0088bdf0f814f561 Mon Sep 17 00:00:00 2001
From: "(Tim) Efthimis Kritikos" <efkf@firemail.cc>
Date: Thu, 22 Feb 2024 00:04:56 +0000
Subject: [PATCH] GUI: Added basic support for freeing up unused parts of the
 cpu output buffer

---
 gui.c     | 53 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 gui.h     |  1 +
 simdata.c | 10 ++++++++--
 3 files changed, 62 insertions(+), 2 deletions(-)

diff --git a/gui.c b/gui.c
index 4c31965..1734ece 100644
--- a/gui.c
+++ b/gui.c
@@ -784,11 +784,15 @@ int update_debug_simdata(struct simdata_t *simdata){
 	mvwprintw(debug_simdata,1,1,"simdata->terminal_output_size: ");
 	if(simdata->terminal_output_size<100*1024)
 		wattron(debug_simdata,COLOR_PAIR(11));
+	else if (simdata->terminal_output_size<500*1024)
+		wattron(debug_simdata,COLOR_PAIR(10));
 	else
 		wattron(debug_simdata,COLOR_PAIR(15));
 	wprintw(debug_simdata,"%d%s",term_size,term_size_unit);
 	if(simdata->terminal_output_size<100*1024)
 		wattroff(debug_simdata,COLOR_PAIR(11));
+	else if (simdata->terminal_output_size<500*1024)
+		wattroff(debug_simdata,COLOR_PAIR(10));
 	else
 		wattroff(debug_simdata,COLOR_PAIR(15));
 	if(height==3)
@@ -972,6 +976,55 @@ int gui_continue_request(struct simdata_t *simdata){
 	return 0;
 }
 
+int clean_cpu_output(struct simdata_t *simdata){
+	uint32_t last_vect_disp=0;
+	uint32_t second_last_vect_disp=simdata->terminal_output_size/4;//TODO: I shouldn't have to initialise this. GCC gives a warning erroneously
+	int vector=0;
+	int vstate=0;
+	uint32_t disps_found=0;
+	if(!simdata)
+		return 0;
+	for(uint64_t i=0;i < simdata->terminal_output_size/4;i++){
+		uint32_t c=simdata->terminal_output[i];
+		if(vector){
+			switch(vstate){
+				case 0: /*start of line*/
+					if(c==0x00000001)
+						vector=0;
+					else if(c==0x00000003){
+						second_last_vect_disp=last_vect_disp;
+						last_vect_disp=i*4;
+						disps_found++;
+					}else
+						vstate++;
+					break;
+				case 1:
+				case 2:
+				case 3:
+					vstate++;
+					break;
+				case 4:
+					vstate=0;
+					break;
+			}
+		}else{
+			switch(c){
+				case 0xffffffff:
+					vector=1;
+					break;
+			}
+		}
+	}
+	if(disps_found>=2){
+		int final_data_size=simdata->terminal_output_size-(second_last_vect_disp+4);
+		memmove((uint8_t*)simdata->terminal_output+4,(uint8_t*)simdata->terminal_output+simdata->terminal_output_size-final_data_size,final_data_size);
+		simdata->terminal_output[0]=0xFFFFFFFF;
+		simdata->terminal_output=realloc(simdata->terminal_output,final_data_size+4);
+		simdata->terminal_output_size=final_data_size+4;
+	}
+	return 0;
+}
+
 int end_gui(){
 	if(endwin()==ERR)
 		return 1;
diff --git a/gui.h b/gui.h
index 54fad9e..07a960e 100644
--- a/gui.h
+++ b/gui.h
@@ -5,6 +5,7 @@ int gui_continue_request(struct simdata_t*);
 int end_gui();
 int gui_error(char *);
 int update_gui(struct simdata_t *);
+int clean_cpu_output(struct simdata_t *simdata);
 
 struct gui_settings_t{
 	uint8_t cycles_per_frame;
diff --git a/simdata.c b/simdata.c
index 4d8c2f9..9faa5a2 100644
--- a/simdata.c
+++ b/simdata.c
@@ -20,6 +20,7 @@
 #include <stdlib.h>
 #include "simdata.h"
 #include <stdio.h>
+#include "gui.h" // for cleaning the cpu output
 
 struct simdata_t *init_simdata(){
 	struct simdata_t * ret=malloc(sizeof(struct simdata_t));
@@ -47,12 +48,17 @@ struct simdata_t *init_simdata(){
 	return ret;
 }
 
+uint8_t output_counter=0;
+
 int terminal_output(uint32_t c,struct simdata_t *simdata){
 	simdata->terminal_output=realloc(simdata->terminal_output,simdata->terminal_output_size+4);
 	if(!simdata->terminal_output)
 		return 1;
-	*(uint32_t*)(simdata->terminal_output+simdata->terminal_output_size/4)=c;
-	simdata->terminal_output_size+=4;
+	simdata->terminal_output[simdata->terminal_output_size/4]=c;
+	simdata->terminal_output_size=simdata->terminal_output_size+4;
+	output_counter++;
+	if((output_counter%100)==0)
+		clean_cpu_output(simdata);
 	return 0;
 }