Initial community commit

Src/replicant/nu/AutoBuffer.h

@@ -0,0 +1,49 @@
+#pragma once
+#include "foundation/error.h"
+#include <stdlib.h>
+
+/* an automatically growing buffer */
+
+class AutoBuffer
+{
+public:
+	AutoBuffer()
+	{
+		buffer=0;
+		buffer_length=0;
+	}
+
+	~AutoBuffer()
+	{
+		free(buffer);
+	}
+
+	operator void *()
+	{
+		return buffer;
+	}
+
+	template <class ptr_t>
+	ptr_t Get()
+	{
+		return (ptr_t)buffer;
+	}
+
+	int Reserve(size_t new_size)
+	{
+		if (new_size <= buffer_length)
+			return NErr_Success;
+
+		void *new_buffer = realloc(buffer, new_size);
+		if (!new_buffer)
+			return NErr_OutOfMemory;
+
+		buffer = new_buffer;
+		buffer_length = new_size;
+		return NErr_Success;
+	}
+
+private:
+	void *buffer;
+	size_t buffer_length;
+};