Major refactor

utils.c

@@ -0,0 +1,91 @@
+#include "ft_ping.h"
+
+uint16_t calculate_checksum(uint16_t *data, int len)
+{
+	uint32_t checksum = 0;
+	int i = 0;
+
+	while (len > 1)
+	{
+		checksum += data[i++];
+		len -= 2;
+	}
+	if (len == 1)
+		checksum += ((uint8_t *)data)[i];
+
+	while (checksum >> 16)
+		checksum = (checksum & 0xFFFF) + (checksum >> 16);
+	return (~checksum);
+}
+
+double get_timestamp()
+{
+	struct timeval timestamp;
+
+	gettimeofday(&timestamp, NULL);
+	return (timestamp.tv_sec + (double)timestamp.tv_usec / 1000000);
+}
+
+struct in_addr get_addr_by_hostname(char *hostname)
+{
+	struct hostent	*he;
+	struct in_addr	**addr_list;
+
+	he = gethostbyname(hostname);
+	addr_list = (struct in_addr **)he->h_addr_list;
+	return (*addr_list[0]);
+}
+
+void fill_timestamp_array(struct packet_stats *stats, double time)
+{
+    stats->timestamp_array[stats->n_packet_recv] = time;
+}
+
+double get_min(double *timestamp_array)
+{
+    double min = timestamp_array[0];
+    for (int i = 1; timestamp_array[i]; i++)
+    {
+        if (min > timestamp_array[i])
+            min = timestamp_array[i];
+    }
+    return (min);
+}
+
+double get_max(double *timestamp_array)
+{
+    double max = timestamp_array[0];
+    for (int i = 1; timestamp_array[i]; i++)
+    {
+        if (max < timestamp_array[i])
+            max = timestamp_array[i];
+    }
+    return (max);
+}
+
+double get_avg(double *timestamp_array)
+{
+    double avg = 0;
+    int i = 0;
+
+    while (timestamp_array[i])
+    {
+        avg += timestamp_array[i];
+        i++;
+    }
+    return (avg /= i);
+}
+
+double get_stddev(double *timestamp_array)
+{
+    float avg = get_avg(timestamp_array);
+    float variance = 0;
+    float variance_tmp;
+
+    for (int i = 0; timestamp_array[i]; i++)
+    {
+        variance_tmp = timestamp_array[i] - avg;
+        variance += variance_tmp * variance_tmp;
+    }
+    return (sqrt(variance));
+}