From ff70e7df27a7cfbb4b6f056a69f6b83d6fbddddf Mon Sep 17 00:00:00 2001
From: Chris Cromer <chris@cromer.cl>
Date: Mon, 12 Nov 2018 18:29:51 -0300
Subject: [PATCH 1/2] fix buffer overflow

---
 src/sort.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/src/sort.c b/src/sort.c
index 4c353cf..4ad975d 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -16,6 +16,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <getopt.h>
+#include <string.h>
 #include "random.h"
 #include "timer.h"
 #include "bubble_sort.h"
@@ -66,6 +67,34 @@ void print_array(int *array, int n) {
 	fprintf(stdout, "\n\n");
 }
 
+/**
+ * Leer el buffer de stdin y guardar el valor si es numerico
+ * @param variable Donde se guarda el valor del stdin
+ * @return Retorna 1 si es exitosa ó 0 si falla
+ */
+int read_buffer(int *variable) {
+	char buffer[12];
+	while (1) {
+		if (fgets(buffer, 12, stdin) != NULL) {
+			if (buffer[strlen(buffer) - 1] == '\n') {
+				buffer[strlen(buffer) - 1] = '\0';
+				break;
+			}
+		}
+	}
+	char **check = malloc(sizeof(char**));
+	long input = strtol(buffer, check, 10);
+	if (*check[0] == '\0') {
+		free(check);
+		*variable = (int) input;
+		return 1;
+	}
+	else {
+		free(check);
+		return 0;
+	}
+}
+
 /**
  * Liberar la memoria al salir
  */
@@ -180,9 +209,7 @@ int main (int argc, char **argv) {
 		if (elegir) {
 			opt = 0;
 			fprintf(stdout, "Elegir elemento %lli: ", i + 1);
-			while (!fscanf(stdin, "%d", &opt)) {
-				// Falló, pide de nuevo después de limpiar stdin
-				while ((opt = getchar()) != '\n' && opt != EOF) { }
+			while (!read_buffer(&opt)) {
 				fprintf(stdout, "Número invalido! Tiene que ser mayor de 1!\n");
 				fprintf(stdout, "Elegir elemento %lli: ", i + 1);
 			}

From 9f99802fae0c8632b048c19404efd6f255f8c47d Mon Sep 17 00:00:00 2001
From: Chris Cromer <chris@cromer.cl>
Date: Mon, 12 Nov 2018 18:31:00 -0300
Subject: [PATCH 2/2] show when timer stops

---
 src/sort.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/sort.c b/src/sort.c
index 4ad975d..aef6a40 100644
--- a/src/sort.c
+++ b/src/sort.c
@@ -232,11 +232,12 @@ int main (int argc, char **argv) {
 		// quick sort
 	}
 	else if (algoritmo == 2) {
-		fprintf(stdout, "Bubble sort corriendo...\n");
+		fprintf(stdout, "Bubble sort corriendo... ");
 		fflush(stdout);
 		start_timer();
 		bubble_sort(array, n);
 		stop_timer();
+		fprintf(stdout, "done\n");
 	}
 	else if (algoritmo == 3) {
 		// bitonic sort