initial import

Foundation/src/Base64Decoder.cpp

@@ -0,0 +1,153 @@
+//
+// Base64Decoder.cpp
+//
+// $Id: //poco/1.1.0/Foundation/src/Base64Decoder.cpp#2 $
+//
+// Library: Foundation
+// Package: Streams
+// Module:  Base64
+//
+// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// Permission is hereby granted, free of charge, to any person or organization
+// obtaining a copy of the software and accompanying documentation covered by
+// this license (the "Software") to use, reproduce, display, distribute,
+// execute, and transmit the Software, and to prepare derivative works of the
+// Software, and to permit third-parties to whom the Software is furnished to
+// do so, all subject to the following:
+// 
+// The copyright notices in the Software and this entire statement, including
+// the above license grant, this restriction and the following disclaimer,
+// must be included in all copies of the Software, in whole or in part, and
+// all derivative works of the Software, unless such copies or derivative
+// works are solely in the form of machine-executable object code generated by
+// a source language processor.
+// 
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
+// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
+// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
+// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+// DEALINGS IN THE SOFTWARE.
+//
+
+
+#include "Foundation/Base64Decoder.h"
+#include "Foundation/Base64Encoder.h"
+#include "Foundation/Exception.h"
+#include "Foundation/Mutex.h"
+
+
+Foundation_BEGIN
+
+
+unsigned char Base64DecoderBuf::IN_ENCODING[256];
+bool Base64DecoderBuf::IN_ENCODING_INIT = false;
+
+
+Base64DecoderBuf::Base64DecoderBuf(std::istream& istr): 
+	_groupLength(0),
+	_groupIndex(0),
+	_istr(istr)
+{
+	static FastMutex mutex;
+	FastMutex::ScopedLock lock(mutex);
+	if (!IN_ENCODING_INIT)
+	{
+		for (int i = 0; i < sizeof(IN_ENCODING); i++)
+		{
+			IN_ENCODING[i] = 0xFF;
+		}
+		for (int i = 0; i < sizeof(Base64EncoderBuf::OUT_ENCODING); i++)
+		{
+			IN_ENCODING[Base64EncoderBuf::OUT_ENCODING[i]] = i;
+		}
+		IN_ENCODING['='] = 0;
+		IN_ENCODING_INIT = true;
+	}
+}
+
+
+Base64DecoderBuf::~Base64DecoderBuf()
+{
+}
+
+
+int Base64DecoderBuf::readFromDevice()
+{
+	if (_groupIndex < _groupLength) 
+	{
+		return _group[_groupIndex++];
+	}
+	else
+	{
+		unsigned char buffer[4];
+		int c;
+		if ((c = readOne()) == -1) return -1;
+		buffer[0] = (unsigned char) c;
+		if (IN_ENCODING[buffer[0]] == 0xFF) throw DataFormatException();
+		if ((c = readOne()) == -1) return -1;
+		buffer[1] = (unsigned char) c;
+		if (IN_ENCODING[buffer[1]] == 0xFF) throw DataFormatException();
+		if ((c = readOne()) == -1) return -1;
+		buffer[2] = c;
+		if (IN_ENCODING[buffer[2]] == 0xFF) throw DataFormatException();
+		if ((c = readOne()) == -1) return -1;
+		buffer[3] = c;
+		if (IN_ENCODING[buffer[3]] == 0xFF) throw DataFormatException();
+		
+		_group[0] = (IN_ENCODING[buffer[0]] << 2) | (IN_ENCODING[buffer[1]] >> 4);
+		_group[1] = ((IN_ENCODING[buffer[1]] & 0x0F) << 4) | (IN_ENCODING[buffer[2]] >> 2);
+		_group[2] = (IN_ENCODING[buffer[2]] << 6) | IN_ENCODING[buffer[3]];
+
+		if (buffer[2] == '=')
+			_groupLength = 1;
+		else if (buffer[3] == '=') 
+			_groupLength = 2;
+		else
+			_groupLength = 3;
+		_groupIndex = 1;
+		return _group[0];
+	}
+}
+
+
+int Base64DecoderBuf::readOne()
+{
+	int ch = _istr.get();
+	while (ch == ' ' || ch == '\r' || ch == '\t' || ch == '\n')
+		ch = _istr.get();
+	return ch;
+}
+
+
+Base64DecoderIOS::Base64DecoderIOS(std::istream& istr): _buf(istr)
+{
+	poco_ios_init(&_buf);
+}
+
+
+Base64DecoderIOS::~Base64DecoderIOS()
+{
+}
+
+
+Base64DecoderBuf* Base64DecoderIOS::rdbuf()
+{
+	return &_buf;
+}
+
+
+Base64Decoder::Base64Decoder(std::istream& istr): Base64DecoderIOS(istr), std::istream(&_buf)
+{
+}
+
+
+Base64Decoder::~Base64Decoder()
+{
+}
+
+
+Foundation_END