1 files changed, 86 insertions, 0 deletions

diff --git a/CryptoPP/basecode.h b/CryptoPP/basecode.h
new file mode 100644
index 000000000..cc44c4342
--- /dev/null
+++ b/CryptoPP/basecode.h
@@ -0,0 +1,86 @@
+#ifndef CRYPTOPP_BASECODE_H
+#define CRYPTOPP_BASECODE_H
+
+#include "filters.h"
+#include "algparam.h"
+#include "argnames.h"
+
+NAMESPACE_BEGIN(CryptoPP)
+
+//! base n encoder, where n is a power of 2
+class CRYPTOPP_DLL BaseN_Encoder : public Unflushable<Filter>
+{
+public:
+	BaseN_Encoder(BufferedTransformation *attachment=NULL)
+		{Detach(attachment);}
+
+	BaseN_Encoder(const byte *alphabet, int log2base, BufferedTransformation *attachment=NULL, int padding=-1)
+	{
+		Detach(attachment);
+		IsolatedInitialize(MakeParameters(Name::EncodingLookupArray(), alphabet)
+			(Name::Log2Base(), log2base)
+			(Name::Pad(), padding != -1)
+			(Name::PaddingByte(), byte(padding)));
+	}
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+	size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
+
+private:
+	const byte *m_alphabet;
+	int m_padding, m_bitsPerChar, m_outputBlockSize;
+	int m_bytePos, m_bitPos;
+	SecByteBlock m_outBuf;
+};
+
+//! base n decoder, where n is a power of 2
+class CRYPTOPP_DLL BaseN_Decoder : public Unflushable<Filter>
+{
+public:
+	BaseN_Decoder(BufferedTransformation *attachment=NULL)
+		{Detach(attachment);}
+
+	BaseN_Decoder(const int *lookup, int log2base, BufferedTransformation *attachment=NULL)
+	{
+		Detach(attachment);
+		IsolatedInitialize(MakeParameters(Name::DecodingLookupArray(), lookup)(Name::Log2Base(), log2base));
+	}
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+	size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
+
+	static void CRYPTOPP_API InitializeDecodingLookupArray(int *lookup, const byte *alphabet, unsigned int base, bool caseInsensitive);
+
+private:
+	const int *m_lookup;
+	int m_padding, m_bitsPerChar, m_outputBlockSize;
+	int m_bytePos, m_bitPos;
+	SecByteBlock m_outBuf;
+};
+
+//! filter that breaks input stream into groups of fixed size
+class CRYPTOPP_DLL Grouper : public Bufferless<Filter>
+{
+public:
+	Grouper(BufferedTransformation *attachment=NULL)
+		{Detach(attachment);}
+
+	Grouper(int groupSize, const std::string &separator, const std::string &terminator, BufferedTransformation *attachment=NULL)
+	{
+		Detach(attachment);
+		IsolatedInitialize(MakeParameters(Name::GroupSize(), groupSize)
+			(Name::Separator(), ConstByteArrayParameter(separator))
+			(Name::Terminator(), ConstByteArrayParameter(terminator)));
+	}
+
+	void IsolatedInitialize(const NameValuePairs &parameters);
+	size_t Put2(const byte *begin, size_t length, int messageEnd, bool blocking);
+
+private:
+	SecByteBlock m_separator, m_terminator;
+	size_t m_groupSize, m_counter;
+};
+
+NAMESPACE_END
+
+#endif