From 2f5b120d90ce98676447df7fbf27397029d84ebd Mon Sep 17 00:00:00 2001
From: Robert Gustafsson <robg@student.chalmers.se>
Date: Thu, 28 Sep 2017 13:41:45 +0200
Subject: Add basic fifoqueue to buffer events

---
 Makefile             |  6 ++--
 fifoqueue.c          | 82 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 includes/fifoqueue.h | 15 ++++++++++
 includes/types.h     | 29 +++++++++++++++++++
 pasad.c              | 29 ++++++++++++-------
 5 files changed, 148 insertions(+), 13 deletions(-)
 create mode 100644 fifoqueue.c
 create mode 100644 includes/fifoqueue.h
 create mode 100644 includes/types.h

diff --git a/Makefile b/Makefile
index c8484f9..8b304a1 100644
--- a/Makefile
+++ b/Makefile
@@ -4,11 +4,13 @@ LDFLAGS =  -L/usr/local/lib -lbroccoli
 
 all: pasad
 
-pasad: pasad.o
-	$(CC) pasad.o -o pasad $(LDFLAGS) 
+pasad: pasad.o fifoqueue.o
+	$(CC) pasad.o fifoqueue.o -o pasad $(LDFLAGS)
 
 pasad.o: pasad.c
 	$(CC) $(CFLAGS) pasad.c
 
+fifoqueue.o: fifoqueue.c
+	$(CC) -c -Wall fifoqueue.c
 clean:
 	rm *.o pasad
diff --git a/fifoqueue.c b/fifoqueue.c
new file mode 100644
index 0000000..56b1dda
--- /dev/null
+++ b/fifoqueue.c
@@ -0,0 +1,82 @@
+#include "includes/fifoqueue.h"
+
+    Fifo_q * 
+init_queue(int size)
+{
+    Fifo_q * q = (Fifo_q *) malloc(sizeof(Fifo_q));
+    q->head = NULL;
+    q->tail = NULL;
+    q->maxSize = size;
+    q->currentSize = 0;
+    return q;
+}
+
+    boolean
+is_full(Fifo_q * q)
+{
+    if(q->currentSize < q->maxSize)
+        return false;
+    else
+        return true;
+}  
+
+    boolean
+is_empty(Fifo_q * q)
+{
+    if(q->head==NULL)
+        return true;
+    else
+        return false; 
+}
+
+    int
+add_to_queue(Fifo_q * q, Sensor_t * sensor)
+{
+    /* TODO delete first one if full */
+    if(q == NULL){
+        return -1;    
+    } 
+    else if(is_full(q)){
+        return -1;
+    }
+    Queue_t * new_elem = (Queue_t *) malloc(sizeof(Queue_t *));
+    new_elem->next = NULL;
+    new_elem->sensor = sensor;
+    if(is_empty(q))
+        q->head = new_elem;
+    else
+        q->tail->next = new_elem;
+    q->tail = new_elem;
+    q->currentSize++;
+    return 1;
+}
+
+    Sensor_t *
+pop_from_queue(Fifo_q * q)
+{
+    if(is_empty(q)){
+        perror("The queue is empty");
+        exit(-1);
+    }
+    Queue_t * head = q->head;
+    q->head = q->head->next;
+    Sensor_t * sensor = head->sensor;
+    free(head);
+    q->currentSize--;
+    return sensor;
+} 
+
+    void
+print_queue(Fifo_q * q)
+{
+    Queue_t * current = q->head;
+    if(current == NULL){
+        printf("The queue is empty!");
+        return;
+    }
+    while(current != NULL){
+        printf("sensor value=%d, sensor uid=%d\n",
+                current->sensor->value, current->sensor->uid);
+        current = current->next;
+    }
+}
diff --git a/includes/fifoqueue.h b/includes/fifoqueue.h
new file mode 100644
index 0000000..9ee5c53
--- /dev/null
+++ b/includes/fifoqueue.h
@@ -0,0 +1,15 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include "types.h"
+
+Fifo_q * init_queue(int size);
+
+boolean is_full(Fifo_q * q);
+
+boolean is_empty(Fifo_q * q);
+
+int add_to_queue(Fifo_q * q, Sensor_t * sensor);
+
+Sensor_t * pop_from_queue(Fifo_q * q);
+
+void print_queue(Fifo_q * q);
diff --git a/includes/types.h b/includes/types.h
new file mode 100644
index 0000000..a8fa1cf
--- /dev/null
+++ b/includes/types.h
@@ -0,0 +1,29 @@
+#ifndef TYPES_H
+#define TYPES_H
+
+#define true 1
+#define false 0
+
+typedef int boolean;
+typedef struct sensor_t Sensor_t;
+typedef struct queue_t Queue_t;
+typedef struct fifo_q Fifo_q;
+
+struct sensor_t{
+    int uid;
+    int value;
+};
+
+struct queue_t{
+    Sensor_t * sensor;
+    Queue_t * next;
+};
+
+struct fifo_q{
+    Queue_t * head;
+    Queue_t * tail;
+    int maxSize;
+    int currentSize;
+};
+
+#endif
diff --git a/pasad.c b/pasad.c
index f75a336..537a804 100644
--- a/pasad.c
+++ b/pasad.c
@@ -1,6 +1,7 @@
 #ifdef BROCCOLI
 #include <broccoli.h>
 #endif
+#include "includes/fifoqueue.h"
 
 char *host_default = "127.0.0.1";
 char *port_default = "47760";
@@ -14,25 +15,24 @@ bro_pasad_response(BroConn *conn, void *data, uint64* registers, uint64* uid)
     data = NULL;
 }
 
-    int
-main(int argc, char **argv)
+    void
+bro_event_listener()
 {
-    BroConn *bc;
-    char hostname[512];
-    int fd = -1;
 
+    int fd = -1;
+    BroConn *bc = NULL;
     bro_init(NULL);
-
-    bro_debug_calltrace = 0;
-    bro_debug_messages  = 0;
+    char hostname[512];
 
     snprintf(hostname, 512, "%s:%s", host_default, port_default);
-
     if (! (bc = bro_conn_new_str(hostname, BRO_CFLAG_RECONNECT | BRO_CFLAG_ALWAYS_QUEUE)))
     {
         printf("Could not get Bro connection handle.\n");
         exit(-1);
     }
+    bro_debug_calltrace = 0;
+    bro_debug_messages  = 0;
+
     bro_event_registry_add(bc, "response",(BroEventFunc) bro_pasad_response, NULL);
 
     if (! bro_conn_connect(bc))
@@ -42,11 +42,11 @@ main(int argc, char **argv)
         exit(-1);
     }
 
-    fd = bro_conn_get_fd(bc);
+    fd =bro_conn_get_fd(bc);
     fd_set rfds;
     setbuf(stdout,NULL);
 
-    while(1)
+    while(true)
     {
         FD_ZERO(&rfds);
         FD_SET(fd,&rfds);
@@ -59,6 +59,13 @@ main(int argc, char **argv)
     }
 
     bro_conn_delete(bc);
+}
+
+    int
+main(int argc, char **argv)
+{
+    Fifo_q * q = init_queue(5);
 
+    free(q);
     return 0;
 }
-- 
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