convert ciculaire buffer to flipflop buffer

rx_esp2866/rx_esp2866.ino

@@ -11,38 +11,57 @@ char rxBuffer[RX_BUFFER_SIZE];
 uint8_t rxBuffer_writePointer = 0;
 uint8_t rxBuffer_readPointer = 0;
 
-class Buffer 
+class FlipFlop_Buffer
 {
-  void *buffer_start;
+  void *buffer_flip;
-  void *buffer_end;
+  void *buffer_flop;
-  int size;
+  size_t _size;
 
-  void *write_p;
+  void *active_buffer;
-  void *read_p;
 
-  Buffer(void *buffer, size)
+  void *_write_head;
+
+  Buffer(size_t size)
   {
-    this->buffer_start = buffer;
+    this->_size = size;
-    this->buffer_end = buffer + size - 1;
+    this->buffer_flip = maloc(size);
+    this->buffer_flop = maloc(size);
 
-    this->write_p = this->buffer_start;
+    this->active_buffer = this->buffer_flip;
-    this->read_p = this->buffer_start;
+  }
-  
+  ~Buffer()
-    this->size = size;
+  {
+    free(this->buffer_flip);
+    free(this->buffer_flop);
   }
 
-  void put(void *data, size_t len)
+  bool put(void *data, size_t len)
   {
-    if (this->write_p + len > buffer_end)
+    bool sucsess;
+    if (this->_write_head + len > this->buffer_flip + this->size)
     {
-      size_t leftToEnd = (size_t)(buffer_end - this->write_p)
+      memcpy(this->_write_head, data, this->_write_head - this->buffer_flip);
-      this->put(data, leftToEnd);
+      sucsess = false;
-      this->put(data + leftToEnd, len - leftToEnd);
     }
     else
     {
       memcpy(this->write_p, data, len);
+      sucsess = true;
     }
+    return sucsess;
+  }
+
+  void* swich_buffer()
+  {
+    if (this->active_buffer == this->buffer_flip)
+    {
+      this->active_buffer == this->buffer_flip;
+    }
+    else
+    {
+      this->active_buffer == this->buffer_flop;
+    }
+    return this->active_buffer;
   }
 }