mirror of
https://github.com/pocoproject/poco.git
synced 2024-12-13 18:45:10 +01:00
139 lines
3.2 KiB
C++
139 lines
3.2 KiB
C++
//
|
|
// Base64Encoder.h
|
|
//
|
|
// Library: Foundation
|
|
// Package: Streams
|
|
// Module: Base64
|
|
//
|
|
// Definition of class Base64Encoder.
|
|
//
|
|
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
|
|
// and Contributors.
|
|
//
|
|
// SPDX-License-Identifier: BSL-1.0
|
|
//
|
|
|
|
|
|
#ifndef Foundation_Base64Encoder_INCLUDED
|
|
#define Foundation_Base64Encoder_INCLUDED
|
|
|
|
|
|
#include "Poco/Foundation.h"
|
|
#include "Poco/UnbufferedStreamBuf.h"
|
|
#include <ostream>
|
|
|
|
|
|
namespace Poco {
|
|
|
|
|
|
enum Base64EncodingOptions
|
|
{
|
|
BASE64_URL_ENCODING = 0x01,
|
|
/// Use the URL and filename-safe alphabet,
|
|
/// replacing '+' with '-' and '/' with '_'.
|
|
///
|
|
/// Will also set line length to unlimited.
|
|
|
|
BASE64_NO_PADDING = 0x02
|
|
/// Do not append padding characters ('=') at end.
|
|
};
|
|
|
|
|
|
class Foundation_API Base64EncoderBuf: public UnbufferedStreamBuf
|
|
/// This streambuf base64-encodes all data written
|
|
/// to it and forwards it to a connected
|
|
/// ostream.
|
|
///
|
|
/// Note: The characters are directly written
|
|
/// to the ostream's streambuf, thus bypassing
|
|
/// the ostream. The ostream's state is therefore
|
|
/// not updated to match the buffer's state.
|
|
{
|
|
public:
|
|
Base64EncoderBuf(std::ostream& ostr, int options = 0);
|
|
~Base64EncoderBuf();
|
|
|
|
int close();
|
|
/// Closes the stream buffer.
|
|
|
|
void setLineLength(int lineLength);
|
|
/// Specify the line length.
|
|
///
|
|
/// After the given number of characters have been written,
|
|
/// a newline character will be written.
|
|
///
|
|
/// Specify 0 for an unlimited line length.
|
|
|
|
int getLineLength() const;
|
|
/// Returns the currently set line length.
|
|
|
|
private:
|
|
int writeToDevice(char c);
|
|
|
|
int _options;
|
|
unsigned char _group[3];
|
|
int _groupLength;
|
|
int _pos;
|
|
int _lineLength;
|
|
std::streambuf& _buf;
|
|
const unsigned char* _pOutEncoding;
|
|
|
|
static const unsigned char OUT_ENCODING[64];
|
|
static const unsigned char OUT_ENCODING_URL[64];
|
|
|
|
friend class Base64DecoderBuf;
|
|
|
|
Base64EncoderBuf(const Base64EncoderBuf&);
|
|
Base64EncoderBuf& operator = (const Base64EncoderBuf&);
|
|
};
|
|
|
|
|
|
class Foundation_API Base64EncoderIOS: public virtual std::ios
|
|
/// The base class for Base64Encoder.
|
|
///
|
|
/// This class is needed to ensure the correct initialization
|
|
/// order of the stream buffer and base classes.
|
|
{
|
|
public:
|
|
Base64EncoderIOS(std::ostream& ostr, int options = 0);
|
|
~Base64EncoderIOS();
|
|
int close();
|
|
Base64EncoderBuf* rdbuf();
|
|
|
|
protected:
|
|
Base64EncoderBuf _buf;
|
|
|
|
private:
|
|
Base64EncoderIOS(const Base64EncoderIOS&);
|
|
Base64EncoderIOS& operator = (const Base64EncoderIOS&);
|
|
};
|
|
|
|
|
|
class Foundation_API Base64Encoder: public Base64EncoderIOS, public std::ostream
|
|
/// This ostream base64-encodes all data
|
|
/// written to it and forwards it to
|
|
/// a connected ostream.
|
|
/// Always call close() when done
|
|
/// writing data, to ensure proper
|
|
/// completion of the encoding operation.
|
|
///
|
|
/// Note: The characters are directly written
|
|
/// to the ostream's streambuf, thus bypassing
|
|
/// the ostream. The ostream's state is therefore
|
|
/// not updated to match the buffer's state.
|
|
{
|
|
public:
|
|
Base64Encoder(std::ostream& ostr, int options = 0);
|
|
~Base64Encoder();
|
|
|
|
private:
|
|
Base64Encoder(const Base64Encoder&);
|
|
Base64Encoder& operator = (const Base64Encoder&);
|
|
};
|
|
|
|
|
|
} // namespace Poco
|
|
|
|
|
|
#endif // Foundation_Base64Encoder_INCLUDED
|