1 files changed, 77 insertions, 0 deletions
diff --git a/lib/httpserver/decode.h b/lib/httpserver/decode.h
new file mode 100644
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--- /dev/null
+++ b/lib/httpserver/decode.h
@@ -0,0 +1,77 @@
+// :mode=c++:
+/*
+decode.h - c++ wrapper for a base64 decoding algorithm
+
+This is part of the libb64 project, and has been placed in the public domain.
+For details, see http://sourceforge.net/projects/libb64
+*/
+
+#ifndef BASE64_DECODE_H
+#define BASE64_DECODE_H
+
+#include <iostream>
+
+namespace base64
+{
+	
+	extern "C"
+	{
+		#include "cdecode.h"
+	}
+	
+	struct decoder
+	{
+		base64_decodestate _state;
+		int _buffersize;
+		
+		decoder(int buffersize_in = 4096)
+		: _buffersize(buffersize_in)
+		{}
+		int decode(char value_in)
+		{
+			return base64_decode_value(value_in);
+		}
+		int decode(const char* code_in, const int length_in, char* plaintext_out)
+		{
+			return base64_decode_block(code_in, length_in, plaintext_out, &_state);
+		}
+		std::string decode(const std::string& input)
+		{
+			base64_init_decodestate(&_state);
+			char* output = new char[2*input.size()];
+			int outlength = decode(input.c_str(), input.size(),
+				output);
+			std::string output_string(output, outlength);
+			base64_init_decodestate(&_state);
+			delete [] output;
+			return output_string;
+		}
+		void decode(std::istream& istream_in, std::ostream& ostream_in)
+		{
+			base64_init_decodestate(&_state);
+			//
+			const int N = _buffersize;
+			char* code = new char[N];
+			char* plaintext = new char[N];
+			int codelength;
+			int plainlength;
+			
+			do
+			{
+				istream_in.read((char*)code, N);
+				codelength = istream_in.gcount();
+				plainlength = decode(code, codelength, plaintext);
+				ostream_in.write((const char*)plaintext, plainlength);
+			}
+			while (istream_in.good() && codelength > 0);
+			//
+			base64_init_decodestate(&_state);
+			
+			delete [] code;
+			delete [] plaintext;
+		}
+	};
+	
+} // namespace base64
+
+#endif // BASE64_DECODE_H