Moved file manipulation functions to helper files

.gitignore

@@ -1 +1,2 @@
 main
+user_file.txt

file_helpers.c

@@ -0,0 +1,51 @@
+#include <stdlib.h>
+#include <stdio.h>
+
+#include "file_helpers.h"
+
+
+char* file_to_string(char* filename) {
+	FILE* fp = fopen(filename,"r");
+
+	fseek(fp,0,SEEK_END);
+	long file_size = ftell(fp);
+	rewind(fp);
+
+	char* buffer = calloc(sizeof(char),file_size+1);
+
+	fread(buffer,1,file_size,fp);
+
+	fclose(fp);
+
+	return buffer;
+	
+}
+
+
+
+
+
+/* Finds the number of lines in a file (Which MUST end in a new-line, if the last
+   line is to be counted) */
+
+int num_of_lines(char* filename) {
+
+	int num_lines = 0;
+	FILE* fp = fopen(filename,"r");
+	
+	if (fp == NULL) {
+		return -1;
+	}
+
+
+	for (int c = getc(fp); c != EOF; c = getc(fp)) {
+		if (c == '\n') {
+			num_lines++;
+		}
+	}
+
+	fclose(fp);
+
+	return num_lines;
+
+}

file_helpers.h

@@ -0,0 +1,11 @@
+
+
+/* Takes a string that represents a filename, and converts the contents 
+of the file into a string */
+char* file_to_string(char* filename);
+
+
+
+
+/*Finds the number of new-line characters in the given file */
+int num_of_lines(char* filename);

main.c

@@ -1,6 +1,3 @@
-#include "message.h"
-#include "user.h"
-#include "easysock.h"
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -8,6 +5,12 @@
 #include <assert.h>
 #include <unistd.h>
 
+#include "message.h"
+#include "user.h"
+#include "easysock.h"
+#include "file_helpers.h"
+#include "message_helpers.h"
+
 #define BUFFER_SIZE 10000
 #define MAX_CONNECTIONS 100
 
@@ -21,6 +24,7 @@ int main() {
 
 	fd_set read_fd_set;
 	int conn_sockets[MAX_CONNECTIONS] = {-1};
+	char* dest_address[MAX_CONNECTIONS] = {NULL};
 	FD_ZERO(&read_fd_set);
 	char buffer[BUFFER_SIZE];
 	User* users = create_user_list("user_file.txt");
@@ -58,10 +62,17 @@ int main() {
 					if (num_bytes_read <= 0) {
 						close(conn_sockets[i]);
 						conn_sockets[i] = 0;
+						dest_address[i] = NULL;
 					} else {
-						for (int i=0;i<num_bytes_read;i++) {
-							printf("%c",buffer[i]);
+						if (dest_address[i] == NULL) {
+							dest_address[i] = fetch_address(buffer);
+
 						}
+						
+
+//						for (int i=0;i<num_bytes_read;i++) {
+//							printf("%c",buffer[i]);
+//						}
 					}
 
 					
@@ -106,51 +117,3 @@ User* create_user_list(char* filename) {
 	return users;
 
 }
-
-
-
-char* file_to_string(char* filename) {
-	FILE* fp = fopen(filename,"r");
-
-	fseek(fp,0,SEEK_END);
-	long file_size = ftell(fp);
-	rewind(fp);
-
-	char* buffer = calloc(sizeof(char),file_size+1);
-
-	fread(buffer,1,file_size,fp);
-
-	fclose(fp);
-
-	return buffer;
-	
-}
-
-
-
-
-
-/* Finds the number of lines in a file (Which MUST end in a new-line, if the last
-   line is to be counted) */
-
-int num_of_lines(char* filename) {
-
-	int num_lines = 0;
-	FILE* fp = fopen(filename,"r");
-	
-	if (fp == NULL) {
-		return -1;
-	}
-
-
-	for (int c = getc(fp); c != EOF; c = getc(fp)) {
-		if (c == '\n') {
-			num_lines++;
-		}
-	}
-
-	fclose(fp);
-
-	return num_lines;
-
-}

message_helpers.c

@@ -0,0 +1,17 @@
+#include <easysock.h>
+
+#include "message_helpers.h"
+
+char* fetch_address(char* message) {
+	char* token = malloc (sizeof(char) * strlen(message));
+	token = strtok(message," ");
+	if (strcmp(token,"TO:") == 0) {
+		token = strtok(NULL,"");
+	}
+
+	if (check_ip_ver(token) == -1) {
+		return NULL;
+	} else {
+		return token;
+	}
+}

message_helpers.h

@@ -0,0 +1,6 @@
+
+
+/* If the message contains a string of the form:
+TO: <Username>
+then return 'Username' */
+char* fetch_address(char* message);