Move Buffer from kge.

Buffer.h

@@ -0,0 +1,48 @@
+//
+// Created by kyle on 2023-10-09.
+//
+
+#ifndef KGE_BUFFER_H
+#define KGE_BUFFER_H
+
+#include <cstdint>
+
+
+namespace klib {
+
+
+class Buffer {
+public:
+	Buffer();
+	Buffer(size_t);
+	Buffer(const char *);
+
+	uint8_t	*Contents() { return this->contents; }
+	size_t	 Size() { return this->length; };
+	size_t	 Capacity() { return this->capacity; }
+
+	bool	 Append(uint8_t *data, size_t datalen);
+	bool	 Append(uint8_t c);
+	bool	 Insert(size_t index, uint8_t *data, size_t datalen);
+	bool	 Insert(size_t index, uint8_t c);
+
+	// bool	 Remove(size_t index, size_t length);
+
+	/* memory management */
+	void	 Resize(size_t newCapacity);
+	size_t	 Trim();
+	void	 Clear();
+	void	 Reclaim();
+
+private:
+	size_t	 mustGrow(size_t delta);
+	bool	 shift(size_t offset, size_t delta);
+
+	uint8_t	*contents;
+	size_t	 length;
+	size_t	 capacity;
+};
+
+} // namespace klib
+
+#endif //KGE_BUFFER_H