From 560b66c8d51e83456b6c3d41fa6ce88ae6e2b2db Mon Sep 17 00:00:00 2001
From: Tucker Evans <tuckerevans24@gmail.com>
Date: Mon, 6 Nov 2017 15:26:54 -0500
Subject: CS3871/assignments/timing: Initial commit

working circular buffer and socket
---
 timing/client.c | 134 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 timing/client.c

diff --git a/timing/client.c b/timing/client.c
new file mode 100644
index 0000000..ea40a87
--- /dev/null
+++ b/timing/client.c
@@ -0,0 +1,134 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <sys/select.h>
+
+#define BUFFER_SIZE 10
+
+struct number_val {
+	int val;
+	struct timeval tv;
+};
+
+typedef struct number_val num;
+
+int sock_init(argv) 
+char **argv;
+{
+	struct sockaddr_in address, serv_addr;
+	int sock = 0, valread;
+	char buffer[1024] = {0};
+
+	if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
+		perror("Socket creation error\n");
+		return -1;
+	}
+	
+	memset(&serv_addr, '0', sizeof(serv_addr));
+
+	serv_addr.sin_family = AF_INET;
+	serv_addr.sin_port = htons(atoi(argv[2]));
+
+	if (inet_pton(AF_INET, argv[1], &serv_addr.sin_addr) <= 0) {
+		perror("Invalid address/Address not supported\n");
+		return -1;
+	}
+
+	if (connect(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
+		perror("Connection Failed");
+		return -1;
+	}
+	return sock;
+}
+
+int main(argc, argv)
+int argc;
+char **argv;
+{
+	int sock = 0, valread, start_ptr = 0, end_ptr = 1, qset, avg, i, cnt;
+	char buffer[1024] = {0};
+	num num_buffer[BUFFER_SIZE];	
+	fd_set rs, ws, es;
+	struct timeval now, ww;
+
+	ww.tv_sec = 5;
+	ww.tv_usec = 500000;
+
+	sock = sock_init(argv);
+	
+	while (1) {
+		FD_ZERO(&rs); FD_ZERO(&ws); FD_ZERO(&es);
+		FD_SET(sock, &rs);
+
+		qset = select(sock + 1, &rs, (fd_set *) 0, (fd_set *) 0, &ww);
+		
+		gettimeofday(&now, NULL);
+		now.tv_sec = now.tv_sec - 60;
+
+		ww.tv_sec = 5;
+
+		if (FD_ISSET(sock, &rs)) {
+			valread = read(sock, buffer, 1024);
+			for (i = 0; i < valread; i+=2) {
+				if (end_ptr == BUFFER_SIZE)
+					end_ptr = 0;
+				if (end_ptr != start_ptr) {
+					gettimeofday(&(num_buffer[end_ptr].tv), NULL);
+					num_buffer[end_ptr].val = atoi(buffer);
+					end_ptr++;
+				} else {
+					printf("dropping number...\n");
+				}
+			}
+		}
+/*
+		if (start_ptr < end_ptr) {
+			for (i = start_ptr; i < end_ptr; i++) {
+				if (num_buffer[i].tv.tv_sec <= now.tv_sec) {
+					start_ptr = i + 1;
+				}
+			}
+		} else {
+			for (i = start_ptr; i < BUFFER_SIZE; i++) {
+				if (num_buffer[i].tv.tv_sec <= now.tv_sec) {
+					start_ptr = i + 1;
+				}
+			}
+
+			for (i = 0; i < end_ptr; i++) {
+				if (num_buffer[i].tv.tv_sec <= now.tv_sec) {
+					start_ptr = i + 1;
+				}
+			}
+
+			start_ptr %= BUFFER_SIZE;
+		}*/
+
+		avg = 0;
+		cnt = start_ptr > end_ptr ? (BUFFER_SIZE - start_ptr + end_ptr) : (end_ptr - start_ptr);
+		cnt = cnt == 0 ? 10 : cnt;
+
+		if (start_ptr < end_ptr) {
+			for (i = start_ptr; i < end_ptr; i++){
+				avg += num_buffer[i].val / cnt;
+			}
+		} else {
+			for (i = start_ptr; i < BUFFER_SIZE; i++){
+				avg += num_buffer[i].val / cnt;
+			}
+			for (i = 0; i < end_ptr; i++) {
+				avg += num_buffer[i].val /cnt;
+			}
+		}
+
+		printf("avg: %10d, start: %2d, end: %2d, cnt: %2d, valread: %d, time: %d\n", avg, start_ptr, end_ptr, cnt, valread, num_buffer[start_ptr].tv.tv_sec);
+/*
+ * valread = read(sock, buffer, 1024);
+ */		
+	}
+
+
+}
-- 
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