initial

external/crypto++-5.61/queue.h

@@ -0,0 +1,143 @@
+// specification file for an unlimited queue for storing bytes
+
+#ifndef CRYPTOPP_QUEUE_H
+#define CRYPTOPP_QUEUE_H
+
+#include "simple.h"
+//#include <algorithm>
+
+NAMESPACE_BEGIN(CryptoPP)
+
+/** The queue is implemented as a linked list of byte arrays, but you don't need to
+    know about that.  So just ignore this next line. :) */
+class ByteQueueNode;
+
+//! Byte Queue
+class CRYPTOPP_DLL ByteQueue : public Bufferless<BufferedTransformation>
+{
+public:
+	ByteQueue(size_t nodeSize=0);
+	ByteQueue(const ByteQueue &copy);
+	~ByteQueue();
+
+	lword MaxRetrievable() const
+		{return CurrentSize();}
+	bool AnyRetrievable() const
+		{return !IsEmpty();}
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+	byte * CreatePutSpace(size_t &size);
+	size_t Put2(const byte *inString, size_t length, int messageEnd, bool blocking);
+
+	size_t Get(byte &outByte);
+	size_t Get(byte *outString, size_t getMax);
+
+	size_t Peek(byte &outByte) const;
+	size_t Peek(byte *outString, size_t peekMax) const;
+
+	size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true);
+	size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const;
+
+	// these member functions are not inherited
+	void SetNodeSize(size_t nodeSize);
+
+	lword CurrentSize() const;
+	bool IsEmpty() const;
+
+	void Clear();
+
+	void Unget(byte inByte);
+	void Unget(const byte *inString, size_t length);
+
+	const byte * Spy(size_t &contiguousSize) const;
+
+	void LazyPut(const byte *inString, size_t size);
+	void LazyPutModifiable(byte *inString, size_t size);
+	void UndoLazyPut(size_t size);
+	void FinalizeLazyPut();
+
+	ByteQueue & operator=(const ByteQueue &rhs);
+	bool operator==(const ByteQueue &rhs) const;
+	byte operator[](lword i) const;
+	void swap(ByteQueue &rhs);
+
+	class Walker : public InputRejecting<BufferedTransformation>
+	{
+	public:
+		Walker(const ByteQueue &queue)
+			: m_queue(queue) {Initialize();}
+
+		lword GetCurrentPosition() {return m_position;}
+
+		lword MaxRetrievable() const
+			{return m_queue.CurrentSize() - m_position;}
+
+		void IsolatedInitialize(const NameValuePairs &parameters);
+
+		size_t Get(byte &outByte);
+		size_t Get(byte *outString, size_t getMax);
+
+		size_t Peek(byte &outByte) const;
+		size_t Peek(byte *outString, size_t peekMax) const;
+
+		size_t TransferTo2(BufferedTransformation &target, lword &transferBytes, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true);
+		size_t CopyRangeTo2(BufferedTransformation &target, lword &begin, lword end=LWORD_MAX, const std::string &channel=DEFAULT_CHANNEL, bool blocking=true) const;
+
+	private:
+		const ByteQueue &m_queue;
+		const ByteQueueNode *m_node;
+		lword m_position;
+		size_t m_offset;
+		const byte *m_lazyString;
+		size_t m_lazyLength;
+	};
+
+	friend class Walker;
+
+private:
+	void CleanupUsedNodes();
+	void CopyFrom(const ByteQueue &copy);
+	void Destroy();
+
+	bool m_autoNodeSize;
+	size_t m_nodeSize;
+	ByteQueueNode *m_head, *m_tail;
+	byte *m_lazyString;
+	size_t m_lazyLength;
+	bool m_lazyStringModifiable;
+};
+
+//! use this to make sure LazyPut is finalized in event of exception
+class CRYPTOPP_DLL LazyPutter
+{
+public:
+	LazyPutter(ByteQueue &bq, const byte *inString, size_t size)
+		: m_bq(bq) {bq.LazyPut(inString, size);}
+	~LazyPutter()
+		{try {m_bq.FinalizeLazyPut();} catch(...) {}}
+protected:
+	LazyPutter(ByteQueue &bq) : m_bq(bq) {}
+private:
+	ByteQueue &m_bq;
+};
+
+//! like LazyPutter, but does a LazyPutModifiable instead
+class LazyPutterModifiable : public LazyPutter
+{
+public:
+	LazyPutterModifiable(ByteQueue &bq, byte *inString, size_t size)
+		: LazyPutter(bq) {bq.LazyPutModifiable(inString, size);}
+};
+
+NAMESPACE_END
+
+#ifndef __BORLANDC__
+NAMESPACE_BEGIN(std)
+template<> inline void swap(CryptoPP::ByteQueue &a, CryptoPP::ByteQueue &b)
+{
+	a.swap(b);
+}
+NAMESPACE_END
+#endif
+
+#endif