/usr/include/log4cxx/helpers/transcoder.h is in liblog4cxx-dev 0.10.0-10ubuntu1.
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef _LOG4CXX_HELPERS_TRANSCODER_H
#define _LOG4CXX_HELPERS_TRANSCODER_H
#if defined(_MSC_VER)
#pragma warning ( push )
#pragma warning ( disable: 4231 4251 4275 4786 )
#endif
#include <log4cxx/logstring.h>
namespace log4cxx {
namespace helpers {
class ByteBuffer;
class Pool;
/**
* Simple transcoder for converting between
* external char and wchar_t strings and
* internal strings.
*
*/
class LOG4CXX_EXPORT Transcoder {
public:
/**
* Appends this specified string of UTF-8 characters to LogString.
*/
static void decodeUTF8(const std::string& src, LogString& dst);
/**
* Converts the LogString to a UTF-8 string.
*/
static void encodeUTF8(const LogString& src, std::string& dst);
/**
* Converts the LogString to a UTF-8 string.
*/
static char* encodeUTF8(const LogString& src, log4cxx::helpers::Pool& p);
/**
* Append UCS-4 code point to a byte buffer as UTF-8.
*/
static void encodeUTF8(unsigned int sv, ByteBuffer& dst);
/**
* Append UCS-4 code point to a byte buffer as UTF-16LE.
*/
static void encodeUTF16LE(unsigned int sv, ByteBuffer& dst);
/**
* Append UCS-4 code point to a byte buffer as UTF-16BE.
*/
static void encodeUTF16BE(unsigned int sv, ByteBuffer& dst);
/**
* Decodes next character from a UTF-8 string.
* @param in string from which the character is extracted.
* @param iter iterator addressing start of character, will be
* advanced to next character if successful.
* @return scalar value (UCS-4) or 0xFFFF if invalid sequence.
*/
static unsigned int decode(const std::string& in,
std::string::const_iterator& iter);
/**
* Appends UCS-4 value to a UTF-8 string.
* @param ch UCS-4 value.
* @param dst destination.
*/
static void encode(unsigned int ch, std::string& dst);
/**
* Appends string in the current code-page
* to a LogString.
*/
static void decode(const std::string& src, LogString& dst);
/**
* Appends a LogString to a string in the current
* code-page. Unrepresentable characters may be
* replaced with loss characters.
*/
static void encode(const LogString& src, std::string& dst);
/**
* Encodes the specified LogString to the current
* character set.
* @param src string to encode.
* @param p pool from which to allocate return value.
* @return pool allocated string.
*/
static char* encode(const LogString& src, log4cxx::helpers::Pool& p);
#if LOG4CXX_WCHAR_T_API || LOG4CXX_LOGCHAR_IS_WCHAR_T || defined(WIN32) || defined(_WIN32)
static void decode(const std::wstring& src, LogString& dst);
static void encode(const LogString& src, std::wstring& dst);
static wchar_t* wencode(const LogString& src, log4cxx::helpers::Pool& p);
/**
* Decodes next character from a wstring.
* @param in string from which the character is extracted.
* @param iter iterator addressing start of character, will be
* advanced to next character if successful.
* @return scalar value (UCS-4) or 0xFFFF if invalid sequence.
*/
static unsigned int decode(const std::wstring& in,
std::wstring::const_iterator& iter);
/**
* Appends UCS-4 value to a UTF-8 string.
* @param ch UCS-4 value.
* @param dst destination.
*/
static void encode(unsigned int ch, std::wstring& dst);
#endif
#if LOG4CXX_UNICHAR_API || LOG4CXX_CFSTRING_API || LOG4CXX_LOGCHAR_IS_UNICHAR
static void decode(const std::basic_string<UniChar>& src, LogString& dst);
static void encode(const LogString& src, std::basic_string<UniChar>& dst);
/**
* Decodes next character from a UniChar string.
* @param in string from which the character is extracted.
* @param iter iterator addressing start of character, will be
* advanced to next character if successful.
* @return scalar value (UCS-4) or 0xFFFF if invalid sequence.
*/
static unsigned int decode(const std::basic_string<UniChar>& in,
std::basic_string<UniChar>::const_iterator& iter);
/**
* Appends UCS-4 value to a UTF-8 string.
* @param ch UCS-4 value.
* @param dst destination.
*/
static void encode(unsigned int ch, std::basic_string<UniChar>& dst);
#endif
#if LOG4CXX_CFSTRING_API
static void decode(const CFStringRef& src, LogString& dst);
static CFStringRef encode(const LogString& src);
#endif
enum { LOSSCHAR = 0x3F };
/**
* Returns a logchar value given a character literal in the ASCII charset.
* Used to implement the LOG4CXX_STR macro for EBCDIC and UNICHAR.
*/
static logchar decode(char v);
/**
* Returns a LogString given a string literal in the ASCII charset.
* Used to implement the LOG4CXX_STR macro for EBCDIC and UNICHAR.
*/
static LogString decode(const char* v);
/**
* Encodes a charset name in the default encoding
* without using a CharsetEncoder (which could trigger recursion).
*/
static std::string encodeCharsetName(const LogString& charsetName);
private:
private:
Transcoder();
Transcoder(const Transcoder&);
Transcoder& operator=(const Transcoder&);
enum { BUFSIZE = 256 };
static size_t encodeUTF8(unsigned int ch, char* dst);
static size_t encodeUTF16BE(unsigned int ch, char* dst);
static size_t encodeUTF16LE(unsigned int ch, char* dst);
};
}
}
#define LOG4CXX_ENCODE_CHAR(var, src) \
std::string var; \
log4cxx::helpers::Transcoder::encode(src, var)
#define LOG4CXX_DECODE_CHAR(var, src) \
log4cxx::LogString var; \
log4cxx::helpers::Transcoder::decode(src, var)
#define LOG4CXX_DECODE_CFSTRING(var, src) \
log4cxx::LogString var; \
log4cxx::helpers::Transcoder::decode(src, var)
#define LOG4CXX_ENCODE_CFSTRING(var, src) \
CFStringRef var = log4cxx::helpers::Transcoder::encode(src)
#if LOG4CXX_LOGCHAR_IS_WCHAR
#define LOG4CXX_ENCODE_WCHAR(var, src) \
const std::wstring& var = src
#define LOG4CXX_DECODE_WCHAR(var, src) \
const log4cxx::LogString& var = src
#else
#define LOG4CXX_ENCODE_WCHAR(var, src) \
std::wstring var; \
log4cxx::helpers::Transcoder::encode(src, var)
#define LOG4CXX_DECODE_WCHAR(var, src) \
log4cxx::LogString var; \
log4cxx::helpers::Transcoder::decode(src, var)
#endif
#if LOG4CXX_LOGCHAR_IS_UNICHAR
#define LOG4CXX_ENCODE_UNICHAR(var, src) \
const std::basic_string<UniChar>& var = src
#define LOG4CXX_DECODE_UNICHAR(var, src) \
const log4cxx::LogString& var = src
#else
#define LOG4CXX_ENCODE_UNICHAR(var, src) \
std::basic_string<UniChar> var; \
log4cxx::helpers::Transcoder::encode(src, var)
#define LOG4CXX_DECODE_UNICHAR(var, src) \
log4cxx::LogString var; \
log4cxx::helpers::Transcoder::decode(src, var)
#endif
#if defined(_MSC_VER)
#pragma warning (pop)
#endif
#endif //_LOG4CXX_HELPERS_TRANSCODER_H
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