From c8f625564c6608887de0b8c1c879a3a8d7dfef98 Mon Sep 17 00:00:00 2001
From: Julian Weigt <juw@posteo.de>
Date: Mon, 9 Feb 2026 21:53:03 +0100
Subject: Handle quitting more user friendly and introduce thread handling
 thread.

---
 charf.c | 56 ++++++++++++++++++++++++++++++++++++++------------------
 1 file changed, 38 insertions(+), 18 deletions(-)

diff --git a/charf.c b/charf.c
index e9daaf3..e77c1aa 100644
--- a/charf.c
+++ b/charf.c
@@ -486,15 +486,16 @@ void print_latex_records_to_file(EXPTYPE exponents[P], VALUETYPE ratios[K+1][P],
 }
 
 /*information given to each thread*/
-typedef struct { EXPTYPE exponents[P]; VALUETYPE (*records_ratio)[K+1][P]; index_t (*records_index)[K+1][P]; int num_thread; int* domain_current; int* cont; } Args;
+typedef struct { EXPTYPE exponents[P]; VALUETYPE (*records_ratio)[K+1][P]; index_t (*records_index)[K+1][P]; int num_thread; int* domain_current; int* finished; bool* abort; } Args;
 
 /*Goes through all functions indexed by those numbers which equal the thread number mod NUM_THREADS.*/
 void* compute_chunk(void* arguments){
 	Args* args = arguments;
-	int i = args -> num_thread;
+	index_t i = 0UL;
+	i += args -> num_thread;
 	int* domain_current = args -> domain_current;
 	int d = 0;
-	while(d >= 0){
+	while(d >= 0 && !*(args -> abort)){
 		d = compute(i, args -> exponents, args -> records_ratio, args -> records_index);
 		if(d > *domain_current){
 			*domain_current = d;
@@ -502,11 +503,24 @@ void* compute_chunk(void* arguments){
 		}
 		i += NUM_THREADS;
 	}
-	(*(args -> cont))++;
-	if(*(args -> cont) >= NUM_THREADS) printf("Calculation finished. Press any button to stop.\n");
+	(*(args -> finished))++;
+	printf("Thread %i finished before index %llu.\n",args -> num_thread,i);
 	return NULL;
 }
 
+typedef struct { pthread_t *threads; char *message; } Thread_handler_args;
+
+void* handle_threads(void* arguments){
+	Thread_handler_args* args = arguments;
+	/*Wait for each thread to complete.*/
+	for (int i = 0; i < NUM_THREADS; i++) {
+		pthread_join(args->threads[i], NULL);
+		printf("In main: Thread %d has ended.\n", i);
+	}
+	printf("All calculations finished.\n");
+	printf(args->message);
+}
+
 int main() {
 	EXPTYPE exponents[P];
 	exponents[0] = int_to_exptype(1);
@@ -521,7 +535,8 @@ int main() {
 	index_t records_index[K+1][P];
 	for(int k=0; k<=K; k++) for(int p=0; p<P; p++) records_ratio[k][p] = int_to_valuetype(0);
 	int domain_current = 0;
-	int cont = 0;
+	int finished = 0;
+	bool abort = false;
 
 	/*Start threads that do the computation.*/
 	for (int i = 0; i < NUM_THREADS; i++) {
@@ -531,34 +546,39 @@ int main() {
 		args[i].records_index = &records_index;
 		args[i].num_thread = i;
 		args[i].domain_current = &domain_current;
-		args[i].cont = &cont;
+		args[i].finished = &finished;
+		args[i].abort = &abort;
 		pthread_create(&threads[i], NULL, compute_chunk, args+i);
 	}
 
+	char prmpt[] = "To exit enter q, quit or exit.\nTo print current records to terminal enter r.\nTo print current records to a file enter p.\nTo do so with tex formatting enter t.\n";
+
+	pthread_t thread_handler;
+	Thread_handler_args thread_handler_args;
+	thread_handler_args.threads = threads;
+	thread_handler_args.message = prmpt;
+	pthread_create(&thread_handler, NULL, handle_threads, &thread_handler_args);
+	
 	/*Capture user input.*/
 	size_t sz = 1024;
-	char prmpt[] = "To exit enter q, quit or exit.\nTo print current records to terminal enter r.\nTo print current records to a file enter p.\nTo do so with tex formatting enter t.\n";
 	char buff[sz];
+	bool user_input_cont = true;
 	do {
 		getLine(prmpt, buff, sz);
 		if( 0 == strcmp(buff,"q") || 0 == strcmp(buff,"quit") || 0 == strcmp(buff,"exit") ){
-			print_records(exponents,records_ratio,records_index);
-			exit(EXIT_SUCCESS);
+			abort = true;
+			if(finished >= NUM_THREADS) user_input_cont = false;
 		}
 		else if( 0 == strcmp(buff,"r")) print_records(exponents,records_ratio,records_index);
 		else if( 0 == strcmp(buff,"t")){
 			getLine("Enter file name:\n", buff, sz);
 			print_latex_records_to_file(exponents,records_ratio,records_index,buff);
 		}
-	} while(cont < NUM_THREADS); //Stop once all threads have finished.
-
-	/*Wait for each thread to complete.*/
-	for (int i = 0; i < NUM_THREADS; i++) {
-		pthread_join(threads[i], NULL);
-		printf("In main: Thread %d has ended.\n", i);
-	}
+	} while(user_input_cont);
 
-	print_records(exponents,records_ratio,records_index);
+	/*Wait for thread handler thread to complete.*/
+	pthread_join(thread_handler, NULL);
+	printf("In main: Thread handler has finished.\n");
 
 	return 0;
 }
-- 
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