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/*
* barrier -- mouse and keyboard sharing utility
* Copyright (C) 2012-2016 Symless Ltd.
* Copyright (C) 2002 Chris Schoeneman
*
* This package is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* found in the file LICENSE that should have accompanied this file.
*
* This package is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include "common/basic_types.h"
#include <string>
//! Unicode utility functions
/*!
This class provides functions for converting between various Unicode
encodings and the current locale encoding.
*/
class Unicode {
public:
//! @name accessors
//@{
//! Test UTF-8 string for validity
/*!
Returns true iff the string contains a valid sequence of UTF-8
encoded characters.
*/
static bool isUTF8(const std::string&);
//! Convert from UTF-8 to UCS-2 encoding
/*!
Convert from UTF-8 to UCS-2. If errors is not NULL then *errors
is set to true iff any character could not be encoded in UCS-2.
Decoding errors do not set *errors.
*/
static std::string UTF8ToUCS2(const std::string&, bool* errors = NULL);
//! Convert from UTF-8 to UCS-4 encoding
/*!
Convert from UTF-8 to UCS-4. If errors is not NULL then *errors
is set to true iff any character could not be encoded in UCS-4.
Decoding errors do not set *errors.
*/
static std::string UTF8ToUCS4(const std::string&, bool* errors = NULL);
//! Convert from UTF-8 to UTF-16 encoding
/*!
Convert from UTF-8 to UTF-16. If errors is not NULL then *errors
is set to true iff any character could not be encoded in UTF-16.
Decoding errors do not set *errors.
*/
static std::string UTF8ToUTF16(const std::string&, bool* errors = NULL);
//! Convert from UTF-8 to UTF-32 encoding
/*!
Convert from UTF-8 to UTF-32. If errors is not NULL then *errors
is set to true iff any character could not be encoded in UTF-32.
Decoding errors do not set *errors.
*/
static std::string UTF8ToUTF32(const std::string&, bool* errors = NULL);
//! Convert from UTF-8 to the current locale encoding
/*!
Convert from UTF-8 to the current locale encoding. If errors is not
NULL then *errors is set to true iff any character could not be encoded.
Decoding errors do not set *errors.
*/
static std::string UTF8ToText(const std::string&, bool* errors = NULL);
//! Convert from UCS-2 to UTF-8
/*!
Convert from UCS-2 to UTF-8. If errors is not NULL then *errors is
set to true iff any character could not be decoded.
*/
static std::string UCS2ToUTF8(const std::string&, bool* errors = NULL);
//! Convert from UCS-4 to UTF-8
/*!
Convert from UCS-4 to UTF-8. If errors is not NULL then *errors is
set to true iff any character could not be decoded.
*/
static std::string UCS4ToUTF8(const std::string&, bool* errors = NULL);
//! Convert from UTF-16 to UTF-8
/*!
Convert from UTF-16 to UTF-8. If errors is not NULL then *errors is
set to true iff any character could not be decoded.
*/
static std::string UTF16ToUTF8(const std::string&, bool* errors = NULL);
//! Convert from UTF-32 to UTF-8
/*!
Convert from UTF-32 to UTF-8. If errors is not NULL then *errors is
set to true iff any character could not be decoded.
*/
static std::string UTF32ToUTF8(const std::string&, bool* errors = NULL);
//! Convert from the current locale encoding to UTF-8
/*!
Convert from the current locale encoding to UTF-8. If errors is not
NULL then *errors is set to true iff any character could not be decoded.
*/
static std::string textToUTF8(const std::string&, bool* errors = NULL);
//@}
private:
// convert UTF8 to wchar_t string (using whatever encoding is native
// to the platform). caller must delete[] the returned string. the
// string is *not* nul terminated; the length (in characters) is
// returned in size.
static wchar_t* UTF8ToWideChar(const std::string&, UInt32& size, bool* errors);
// convert nul terminated wchar_t string (in platform's native
// encoding) to UTF8.
static std::string wideCharToUTF8(const wchar_t*, UInt32 size, bool* errors);
// internal conversion to UTF8
static std::string doUCS2ToUTF8(const UInt8* src, UInt32 n, bool* errors);
static std::string doUCS4ToUTF8(const UInt8* src, UInt32 n, bool* errors);
static std::string doUTF16ToUTF8(const UInt8* src, UInt32 n, bool* errors);
static std::string doUTF32ToUTF8(const UInt8* src, UInt32 n, bool* errors);
// convert characters to/from UTF8
static UInt32 fromUTF8(const UInt8*& src, UInt32& size);
static void toUTF8(std::string& dst, UInt32 c, bool* errors);
private:
static UInt32 s_invalid;
static UInt32 s_replacement;
};
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