- added processor

git-svn-id: http://moon:8086/svn/software/trunk/libsrc/cpp@874 b431acfa-c32f-4a4a-93f1-934dc6c82436

radio/processor/src/Buffer.hpp

@@ -0,0 +1,93 @@
+#ifndef __PROCESSOR_BUFFER_HPP__
+#define __PROCESSOR_BUFFER_HPP__
+
+#include <stddef.h>
+#include <math.h>
+#include <exception>
+
+#ifdef PROCESSOR_BUFFER_USE_EXCEPTIONS
+#define RETURN_OR_EXCEPT(code) throw Buffer::Exception(code)
+#else
+#define RETURN_OR_EXCEPT(code) return code
+#endif
+
+template <typename T>
+class Buffer
+{
+	public:
+	enum Result
+	{
+		Ok=0,
+		Err_InvalidSize=1
+	};
+
+	class Exception : public std::exception
+	{
+		public:
+		Exception(Result code)
+		: std::exception()
+		, m_code(code)
+		{
+
+		}
+		const char* what() const _GLIBCXX_TXN_SAFE_DYN _GLIBCXX_NOTHROW
+		{
+			static std::string r = "Return code = " + std::to_string(m_code);
+			return r.c_str();
+		}
+		Result m_code;
+
+	};
+	Buffer(size_t capacity);
+	~Buffer();
+
+	size_t len();
+	size_t capacity();
+	void clear();
+
+	T* data_w();
+	T* data_r();
+	size_t write(const T* pData, size_t len);
+	size_t read(T* pData, size_t len);
+	Result consume(size_t len);
+	Result produce(size_t len);
+	void print(const char *prefix);
+
+	private:
+	size_t m_capacity;
+	size_t m_len;
+	size_t m_wi;
+	size_t m_ri;
+	T *m_data[2];
+	size_t m_bid;
+	void make_contigious()
+	{
+		if (m_len == 0)
+		{
+			return;
+		}
+		size_t cont_len = std::min(m_capacity - m_ri, m_len);
+		if (cont_len < m_len)
+		{
+			m_wi = m_len;
+			read(bufferStdBy(), m_len);
+			m_ri = 0;
+			m_len = m_wi;
+			m_bid = !m_bid & 1;
+		}
+	}
+	T *bufferActive()
+	{
+		return m_data[m_bid];
+	}
+
+	T *bufferStdBy()
+	{
+		return m_data[!m_bid & 1];
+	}
+};
+
+#include "Buffer.tcc"
+
+
+#endif // __PROCESSOR_BUFFER_HPP__