first commit

libraries/ESP8266MQTTClient/src/mqtt_outbox.c

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+/*
+* @Author: Tuan PM
+* @Date:   2016-10-02 09:45:51
+* @Last Modified by:   TuanPM
+* @Last Modified time: 2016-11-27 11:41:57
+*/
+
+#include "mqtt_outbox.h"
+#include <stdlib.h>
+#include <string.h>
+
+static mqtt_outbox *ob_set_data(mqtt_outbox *ob, char *data, int len, int msg_id, int msg_type, int tick, int remove_on_sent)
+{
+    ob->buffer = malloc(len);
+    if(ob->buffer == NULL)
+        return NULL;
+    ob->len = len;
+    ob->msg_id = msg_id;
+    ob->msg_type = msg_type;
+    ob->retry_count = 0;
+    ob->tick_created = tick;
+    ob->next = NULL;
+    ob->prev = NULL;
+    ob->pending = 0;
+    ob->remove_on_sent = remove_on_sent;
+    memcpy(ob->buffer, data, len);
+    return ob;
+}
+mqtt_outbox *ob_create()
+{
+    mqtt_outbox *ob = (mqtt_outbox *) malloc(sizeof(mqtt_outbox));
+    if(ob)
+        memset(ob, 0, sizeof(mqtt_outbox));
+    return ob;
+}
+
+mqtt_outbox *ob_get_oldest_no_pending(mqtt_outbox *ob)
+{
+    mqtt_outbox *oldest = ob->next;
+    while(oldest != NULL && oldest->pending == 1) {
+        oldest = oldest->next;
+    }
+    if(oldest != NULL && oldest->pending == 0)
+        return oldest;
+    return NULL;
+}
+mqtt_outbox *ob_get_top(mqtt_outbox *ob)
+{
+    mqtt_outbox *top = ob;
+    while(top->next != NULL) {
+        top = top->next;
+    }
+    return top;
+}
+
+
+mqtt_outbox *ob_put(mqtt_outbox *ob, uint8_t *data, int len, int msg_id, int msg_type, int tick, int remove_on_sent)
+{
+    mqtt_outbox *top = ob_get_top(ob);
+    top->next = ob_create();
+    if(top->next) {
+        ob_set_data(top->next, data, len, msg_id, msg_type, tick, remove_on_sent);
+        top->next->prev = top;
+    }
+    return top->next;
+}
+
+mqtt_outbox *ob_get(mqtt_outbox *ob, int msg_id)
+{
+    mqtt_outbox *found = ob->next;
+    while(found != NULL) {
+        if(found->msg_id == msg_id) {
+            // found->retry_count ++;
+            return found;
+        } else {
+            found = found->next;    //ignore root
+        }
+    }
+    return NULL;
+}
+mqtt_outbox *ob_del_ob(mqtt_outbox *del)
+{
+    mqtt_outbox *next = NULL;
+    if(del->next) {
+        next = del->next;
+        del->prev->next = del->next;
+        del->next->prev = del->prev;
+    } else {
+        del->prev->next = NULL;
+    }
+    free(del->buffer);
+    free(del);
+    return next;
+}
+mqtt_outbox *ob_del_id_type(mqtt_outbox *ob, int msg_id, int msg_type)
+{
+    mqtt_outbox *found = ob->next;
+    while(found != NULL) {
+        if(found->msg_id == msg_id && found->msg_type == msg_type) {
+            return ob_del_ob(found);
+        } else {
+            found = found->next;
+        }
+    }
+    return NULL;
+}
+int ob_del_id(mqtt_outbox *ob, int msg_id)
+{
+    int deleted = 0;
+    mqtt_outbox *found = ob->next;
+    while(found != NULL) {
+        if(found->msg_id == msg_id) {
+            deleted ++;
+            found = ob_del_ob(found);
+        } else {
+            found = found->next;
+        }
+    }
+    return deleted;
+}
+mqtt_outbox *ob_del_oldest(mqtt_outbox *ob)
+{
+    mqtt_outbox *oldest = ob->next;
+    if(oldest) {
+        return ob_del_ob(oldest);
+    }
+    return NULL;
+}
+
+int ob_del_expired(mqtt_outbox *ob, int current_tick, int timeout)
+{
+    int del_count = 0;
+    mqtt_outbox *found = ob->next;
+    while(found != NULL) {
+        if(current_tick - found->tick_created > timeout) {
+            found = ob_del_ob(found);
+            del_count ++;
+        } else {
+            found = found->next;
+        }
+    }
+    return del_count;
+}
+
+int ob_get_size(mqtt_outbox *ob)
+{
+    mqtt_outbox *found = ob->next;
+    int sz = 0;
+    while(found != NULL) {
+        sz += found->len;
+        found = found->next;
+    }
+    return sz;
+}
+int ob_cleanup(mqtt_outbox *ob, int max_size)
+{
+    while(ob_get_size(ob) > max_size) {
+        ob_del_oldest(ob);
+    }
+    return ob_get_size(ob);
+}
+void ob_destroy(mqtt_outbox *ob)
+{
+    while(ob_del_oldest(ob));
+    free(ob);
+}