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- ////////////////////////////////////////////////////////////
- //
- // SFML - Simple and Fast Multimedia Library
- // Copyright (C) 2007-2017 Laurent Gomila (laurent@sfml-dev.org)
- //
- // This software is provided 'as-is', without any express or implied warranty.
- // In no event will the authors be held liable for any damages arising from the use of this software.
- //
- // Permission is granted to anyone to use this software for any purpose,
- // including commercial applications, and to alter it and redistribute it freely,
- // subject to the following restrictions:
- //
- // 1. The origin of this software must not be misrepresented;
- // you must not claim that you wrote the original software.
- // If you use this software in a product, an acknowledgment
- // in the product documentation would be appreciated but is not required.
- //
- // 2. Altered source versions must be plainly marked as such,
- // and must not be misrepresented as being the original software.
- //
- // 3. This notice may not be removed or altered from any source distribution.
- //
- ////////////////////////////////////////////////////////////
- ////////////////////////////////////////////////////////////
- // References:
- //
- // http://www.unicode.org/
- // http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.c
- // http://www.unicode.org/Public/PROGRAMS/CVTUTF/ConvertUTF.h
- // http://people.w3.org/rishida/scripts/uniview/conversion
- //
- ////////////////////////////////////////////////////////////
- ////////////////////////////////////////////////////////////
- template <typename In>
- In Utf<8>::decode(In begin, In end, Uint32& output, Uint32 replacement)
- {
- // Some useful precomputed data
- static const int trailing[256] =
- {
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5
- };
- static const Uint32 offsets[6] =
- {
- 0x00000000, 0x00003080, 0x000E2080, 0x03C82080, 0xFA082080, 0x82082080
- };
- // decode the character
- int trailingBytes = trailing[static_cast<Uint8>(*begin)];
- if (begin + trailingBytes < end)
- {
- output = 0;
- switch (trailingBytes)
- {
- case 5: output += static_cast<Uint8>(*begin++); output <<= 6;
- case 4: output += static_cast<Uint8>(*begin++); output <<= 6;
- case 3: output += static_cast<Uint8>(*begin++); output <<= 6;
- case 2: output += static_cast<Uint8>(*begin++); output <<= 6;
- case 1: output += static_cast<Uint8>(*begin++); output <<= 6;
- case 0: output += static_cast<Uint8>(*begin++);
- }
- output -= offsets[trailingBytes];
- }
- else
- {
- // Incomplete character
- begin = end;
- output = replacement;
- }
- return begin;
- }
- ////////////////////////////////////////////////////////////
- template <typename Out>
- Out Utf<8>::encode(Uint32 input, Out output, Uint8 replacement)
- {
- // Some useful precomputed data
- static const Uint8 firstBytes[7] =
- {
- 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
- };
- // encode the character
- if ((input > 0x0010FFFF) || ((input >= 0xD800) && (input <= 0xDBFF)))
- {
- // Invalid character
- if (replacement)
- *output++ = replacement;
- }
- else
- {
- // Valid character
- // Get the number of bytes to write
- std::size_t bytestoWrite = 1;
- if (input < 0x80) bytestoWrite = 1;
- else if (input < 0x800) bytestoWrite = 2;
- else if (input < 0x10000) bytestoWrite = 3;
- else if (input <= 0x0010FFFF) bytestoWrite = 4;
- // Extract the bytes to write
- Uint8 bytes[4];
- switch (bytestoWrite)
- {
- case 4: bytes[3] = static_cast<Uint8>((input | 0x80) & 0xBF); input >>= 6;
- case 3: bytes[2] = static_cast<Uint8>((input | 0x80) & 0xBF); input >>= 6;
- case 2: bytes[1] = static_cast<Uint8>((input | 0x80) & 0xBF); input >>= 6;
- case 1: bytes[0] = static_cast<Uint8> (input | firstBytes[bytestoWrite]);
- }
- // Add them to the output
- output = std::copy(bytes, bytes + bytestoWrite, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- In Utf<8>::next(In begin, In end)
- {
- Uint32 codepoint;
- return decode(begin, end, codepoint);
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- std::size_t Utf<8>::count(In begin, In end)
- {
- std::size_t length = 0;
- while (begin < end)
- {
- begin = next(begin, end);
- ++length;
- }
- return length;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::fromAnsi(In begin, In end, Out output, const std::locale& locale)
- {
- while (begin < end)
- {
- Uint32 codepoint = Utf<32>::decodeAnsi(*begin++, locale);
- output = encode(codepoint, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::fromWide(In begin, In end, Out output)
- {
- while (begin < end)
- {
- Uint32 codepoint = Utf<32>::decodeWide(*begin++);
- output = encode(codepoint, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::fromLatin1(In begin, In end, Out output)
- {
- // Latin-1 is directly compatible with Unicode encodings,
- // and can thus be treated as (a sub-range of) UTF-32
- while (begin < end)
- output = encode(*begin++, output);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::toAnsi(In begin, In end, Out output, char replacement, const std::locale& locale)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- output = Utf<32>::encodeAnsi(codepoint, output, replacement, locale);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::toWide(In begin, In end, Out output, wchar_t replacement)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- output = Utf<32>::encodeWide(codepoint, output, replacement);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::toLatin1(In begin, In end, Out output, char replacement)
- {
- // Latin-1 is directly compatible with Unicode encodings,
- // and can thus be treated as (a sub-range of) UTF-32
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- *output++ = codepoint < 256 ? static_cast<char>(codepoint) : replacement;
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::toUtf8(In begin, In end, Out output)
- {
- return std::copy(begin, end, output);
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::toUtf16(In begin, In end, Out output)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- output = Utf<16>::encode(codepoint, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<8>::toUtf32(In begin, In end, Out output)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- *output++ = codepoint;
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- In Utf<16>::decode(In begin, In end, Uint32& output, Uint32 replacement)
- {
- Uint16 first = *begin++;
- // If it's a surrogate pair, first convert to a single UTF-32 character
- if ((first >= 0xD800) && (first <= 0xDBFF))
- {
- if (begin < end)
- {
- Uint32 second = *begin++;
- if ((second >= 0xDC00) && (second <= 0xDFFF))
- {
- // The second element is valid: convert the two elements to a UTF-32 character
- output = static_cast<Uint32>(((first - 0xD800) << 10) + (second - 0xDC00) + 0x0010000);
- }
- else
- {
- // Invalid character
- output = replacement;
- }
- }
- else
- {
- // Invalid character
- begin = end;
- output = replacement;
- }
- }
- else
- {
- // We can make a direct copy
- output = first;
- }
- return begin;
- }
- ////////////////////////////////////////////////////////////
- template <typename Out>
- Out Utf<16>::encode(Uint32 input, Out output, Uint16 replacement)
- {
- if (input <= 0xFFFF)
- {
- // The character can be copied directly, we just need to check if it's in the valid range
- if ((input >= 0xD800) && (input <= 0xDFFF))
- {
- // Invalid character (this range is reserved)
- if (replacement)
- *output++ = replacement;
- }
- else
- {
- // Valid character directly convertible to a single UTF-16 character
- *output++ = static_cast<Uint16>(input);
- }
- }
- else if (input > 0x0010FFFF)
- {
- // Invalid character (greater than the maximum Unicode value)
- if (replacement)
- *output++ = replacement;
- }
- else
- {
- // The input character will be converted to two UTF-16 elements
- input -= 0x0010000;
- *output++ = static_cast<Uint16>((input >> 10) + 0xD800);
- *output++ = static_cast<Uint16>((input & 0x3FFUL) + 0xDC00);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- In Utf<16>::next(In begin, In end)
- {
- Uint32 codepoint;
- return decode(begin, end, codepoint);
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- std::size_t Utf<16>::count(In begin, In end)
- {
- std::size_t length = 0;
- while (begin < end)
- {
- begin = next(begin, end);
- ++length;
- }
- return length;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::fromAnsi(In begin, In end, Out output, const std::locale& locale)
- {
- while (begin < end)
- {
- Uint32 codepoint = Utf<32>::decodeAnsi(*begin++, locale);
- output = encode(codepoint, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::fromWide(In begin, In end, Out output)
- {
- while (begin < end)
- {
- Uint32 codepoint = Utf<32>::decodeWide(*begin++);
- output = encode(codepoint, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::fromLatin1(In begin, In end, Out output)
- {
- // Latin-1 is directly compatible with Unicode encodings,
- // and can thus be treated as (a sub-range of) UTF-32
- return std::copy(begin, end, output);
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::toAnsi(In begin, In end, Out output, char replacement, const std::locale& locale)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- output = Utf<32>::encodeAnsi(codepoint, output, replacement, locale);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::toWide(In begin, In end, Out output, wchar_t replacement)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- output = Utf<32>::encodeWide(codepoint, output, replacement);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::toLatin1(In begin, In end, Out output, char replacement)
- {
- // Latin-1 is directly compatible with Unicode encodings,
- // and can thus be treated as (a sub-range of) UTF-32
- while (begin < end)
- {
- *output++ = *begin < 256 ? static_cast<char>(*begin) : replacement;
- begin++;
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::toUtf8(In begin, In end, Out output)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- output = Utf<8>::encode(codepoint, output);
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::toUtf16(In begin, In end, Out output)
- {
- return std::copy(begin, end, output);
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<16>::toUtf32(In begin, In end, Out output)
- {
- while (begin < end)
- {
- Uint32 codepoint;
- begin = decode(begin, end, codepoint);
- *output++ = codepoint;
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- In Utf<32>::decode(In begin, In /*end*/, Uint32& output, Uint32 /*replacement*/)
- {
- output = *begin++;
- return begin;
- }
- ////////////////////////////////////////////////////////////
- template <typename Out>
- Out Utf<32>::encode(Uint32 input, Out output, Uint32 /*replacement*/)
- {
- *output++ = input;
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- In Utf<32>::next(In begin, In /*end*/)
- {
- return ++begin;
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- std::size_t Utf<32>::count(In begin, In end)
- {
- return begin - end;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::fromAnsi(In begin, In end, Out output, const std::locale& locale)
- {
- while (begin < end)
- *output++ = decodeAnsi(*begin++, locale);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::fromWide(In begin, In end, Out output)
- {
- while (begin < end)
- *output++ = decodeWide(*begin++);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::fromLatin1(In begin, In end, Out output)
- {
- // Latin-1 is directly compatible with Unicode encodings,
- // and can thus be treated as (a sub-range of) UTF-32
- return std::copy(begin, end, output);
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::toAnsi(In begin, In end, Out output, char replacement, const std::locale& locale)
- {
- while (begin < end)
- output = encodeAnsi(*begin++, output, replacement, locale);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::toWide(In begin, In end, Out output, wchar_t replacement)
- {
- while (begin < end)
- output = encodeWide(*begin++, output, replacement);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::toLatin1(In begin, In end, Out output, char replacement)
- {
- // Latin-1 is directly compatible with Unicode encodings,
- // and can thus be treated as (a sub-range of) UTF-32
- while (begin < end)
- {
- *output++ = *begin < 256 ? static_cast<char>(*begin) : replacement;
- begin++;
- }
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::toUtf8(In begin, In end, Out output)
- {
- while (begin < end)
- output = Utf<8>::encode(*begin++, output);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::toUtf16(In begin, In end, Out output)
- {
- while (begin < end)
- output = Utf<16>::encode(*begin++, output);
- return output;
- }
- ////////////////////////////////////////////////////////////
- template <typename In, typename Out>
- Out Utf<32>::toUtf32(In begin, In end, Out output)
- {
- return std::copy(begin, end, output);
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- Uint32 Utf<32>::decodeAnsi(In input, const std::locale& locale)
- {
- // On Windows, GCC's standard library (glibc++) has almost
- // no support for Unicode stuff. As a consequence, in this
- // context we can only use the default locale and ignore
- // the one passed as parameter.
- #if defined(SFML_SYSTEM_WINDOWS) && /* if Windows ... */ \
- (defined(__GLIBCPP__) || defined (__GLIBCXX__)) && /* ... and standard library is glibc++ ... */ \
- !(defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)) /* ... and STLPort is not used on top of it */
- (void)locale; // to avoid warnings
- wchar_t character = 0;
- mbtowc(&character, &input, 1);
- return static_cast<Uint32>(character);
- #else
- // Get the facet of the locale which deals with character conversion
- const std::ctype<wchar_t>& facet = std::use_facet< std::ctype<wchar_t> >(locale);
- // Use the facet to convert each character of the input string
- return static_cast<Uint32>(facet.widen(input));
- #endif
- }
- ////////////////////////////////////////////////////////////
- template <typename In>
- Uint32 Utf<32>::decodeWide(In input)
- {
- // The encoding of wide characters is not well defined and is left to the system;
- // however we can safely assume that it is UCS-2 on Windows and
- // UCS-4 on Unix systems.
- // In both cases, a simple copy is enough (UCS-2 is a subset of UCS-4,
- // and UCS-4 *is* UTF-32).
- return input;
- }
- ////////////////////////////////////////////////////////////
- template <typename Out>
- Out Utf<32>::encodeAnsi(Uint32 codepoint, Out output, char replacement, const std::locale& locale)
- {
- // On Windows, gcc's standard library (glibc++) has almost
- // no support for Unicode stuff. As a consequence, in this
- // context we can only use the default locale and ignore
- // the one passed as parameter.
- #if defined(SFML_SYSTEM_WINDOWS) && /* if Windows ... */ \
- (defined(__GLIBCPP__) || defined (__GLIBCXX__)) && /* ... and standard library is glibc++ ... */ \
- !(defined(__SGI_STL_PORT) || defined(_STLPORT_VERSION)) /* ... and STLPort is not used on top of it */
- (void)locale; // to avoid warnings
- char character = 0;
- if (wctomb(&character, static_cast<wchar_t>(codepoint)) >= 0)
- *output++ = character;
- else if (replacement)
- *output++ = replacement;
- return output;
- #else
- // Get the facet of the locale which deals with character conversion
- const std::ctype<wchar_t>& facet = std::use_facet< std::ctype<wchar_t> >(locale);
- // Use the facet to convert each character of the input string
- *output++ = facet.narrow(static_cast<wchar_t>(codepoint), replacement);
- return output;
- #endif
- }
- ////////////////////////////////////////////////////////////
- template <typename Out>
- Out Utf<32>::encodeWide(Uint32 codepoint, Out output, wchar_t replacement)
- {
- // The encoding of wide characters is not well defined and is left to the system;
- // however we can safely assume that it is UCS-2 on Windows and
- // UCS-4 on Unix systems.
- // For UCS-2 we need to check if the source characters fits in (UCS-2 is a subset of UCS-4).
- // For UCS-4 we can do a direct copy (UCS-4 *is* UTF-32).
- switch (sizeof(wchar_t))
- {
- case 4:
- {
- *output++ = static_cast<wchar_t>(codepoint);
- break;
- }
- default:
- {
- if ((codepoint <= 0xFFFF) && ((codepoint < 0xD800) || (codepoint > 0xDFFF)))
- {
- *output++ = static_cast<wchar_t>(codepoint);
- }
- else if (replacement)
- {
- *output++ = replacement;
- }
- break;
- }
- }
- return output;
- }
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