diff options
Diffstat (limited to 'NorthstarDLL/include/rapidjson/encodings.h')
| -rw-r--r-- | NorthstarDLL/include/rapidjson/encodings.h | 1432 |
1 files changed, 716 insertions, 716 deletions
diff --git a/NorthstarDLL/include/rapidjson/encodings.h b/NorthstarDLL/include/rapidjson/encodings.h index b20c6342..baa7c2b1 100644 --- a/NorthstarDLL/include/rapidjson/encodings.h +++ b/NorthstarDLL/include/rapidjson/encodings.h @@ -1,716 +1,716 @@ -// Tencent is pleased to support the open source community by making RapidJSON available.
-//
-// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
-//
-// Licensed under the MIT License (the "License"); you may not use this file except
-// in compliance with the License. You may obtain a copy of the License at
-//
-// http://opensource.org/licenses/MIT
-//
-// 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 RAPIDJSON_ENCODINGS_H_
-#define RAPIDJSON_ENCODINGS_H_
-
-#include "rapidjson.h"
-
-#ifdef _MSC_VER
-RAPIDJSON_DIAG_PUSH
-RAPIDJSON_DIAG_OFF(4244) // conversion from 'type1' to 'type2', possible loss of data
-RAPIDJSON_DIAG_OFF(4702) // unreachable code
-#elif defined(__GNUC__)
-RAPIDJSON_DIAG_PUSH
-RAPIDJSON_DIAG_OFF(effc++)
-RAPIDJSON_DIAG_OFF(overflow)
-#endif
-
-RAPIDJSON_NAMESPACE_BEGIN
-
-///////////////////////////////////////////////////////////////////////////////
-// Encoding
-
-/*! \class rapidjson::Encoding
- \brief Concept for encoding of Unicode characters.
-
-\code
-concept Encoding {
- typename Ch; //! Type of character. A "character" is actually a code unit in unicode's definition.
-
- enum { supportUnicode = 1 }; // or 0 if not supporting unicode
-
- //! \brief Encode a Unicode codepoint to an output stream.
- //! \param os Output stream.
- //! \param codepoint An unicode codepoint, ranging from 0x0 to 0x10FFFF inclusively.
- template<typename OutputStream>
- static void Encode(OutputStream& os, unsigned codepoint);
-
- //! \brief Decode a Unicode codepoint from an input stream.
- //! \param is Input stream.
- //! \param codepoint Output of the unicode codepoint.
- //! \return true if a valid codepoint can be decoded from the stream.
- template <typename InputStream>
- static bool Decode(InputStream& is, unsigned* codepoint);
-
- //! \brief Validate one Unicode codepoint from an encoded stream.
- //! \param is Input stream to obtain codepoint.
- //! \param os Output for copying one codepoint.
- //! \return true if it is valid.
- //! \note This function just validating and copying the codepoint without actually decode it.
- template <typename InputStream, typename OutputStream>
- static bool Validate(InputStream& is, OutputStream& os);
-
- // The following functions are deal with byte streams.
-
- //! Take a character from input byte stream, skip BOM if exist.
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is);
-
- //! Take a character from input byte stream.
- template <typename InputByteStream>
- static Ch Take(InputByteStream& is);
-
- //! Put BOM to output byte stream.
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os);
-
- //! Put a character to output byte stream.
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, Ch c);
-};
-\endcode
-*/
-
-///////////////////////////////////////////////////////////////////////////////
-// UTF8
-
-//! UTF-8 encoding.
-/*! http://en.wikipedia.org/wiki/UTF-8
- http://tools.ietf.org/html/rfc3629
- \tparam CharType Code unit for storing 8-bit UTF-8 data. Default is char.
- \note implements Encoding concept
-*/
-template<typename CharType = char>
-struct UTF8 {
- typedef CharType Ch;
-
- enum { supportUnicode = 1 };
-
- template<typename OutputStream>
- static void Encode(OutputStream& os, unsigned codepoint) {
- if (codepoint <= 0x7F)
- os.Put(static_cast<Ch>(codepoint & 0xFF));
- else if (codepoint <= 0x7FF) {
- os.Put(static_cast<Ch>(0xC0 | ((codepoint >> 6) & 0xFF)));
- os.Put(static_cast<Ch>(0x80 | ((codepoint & 0x3F))));
- }
- else if (codepoint <= 0xFFFF) {
- os.Put(static_cast<Ch>(0xE0 | ((codepoint >> 12) & 0xFF)));
- os.Put(static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
- os.Put(static_cast<Ch>(0x80 | (codepoint & 0x3F)));
- }
- else {
- RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
- os.Put(static_cast<Ch>(0xF0 | ((codepoint >> 18) & 0xFF)));
- os.Put(static_cast<Ch>(0x80 | ((codepoint >> 12) & 0x3F)));
- os.Put(static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
- os.Put(static_cast<Ch>(0x80 | (codepoint & 0x3F)));
- }
- }
-
- template<typename OutputStream>
- static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
- if (codepoint <= 0x7F)
- PutUnsafe(os, static_cast<Ch>(codepoint & 0xFF));
- else if (codepoint <= 0x7FF) {
- PutUnsafe(os, static_cast<Ch>(0xC0 | ((codepoint >> 6) & 0xFF)));
- PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint & 0x3F))));
- }
- else if (codepoint <= 0xFFFF) {
- PutUnsafe(os, static_cast<Ch>(0xE0 | ((codepoint >> 12) & 0xFF)));
- PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
- PutUnsafe(os, static_cast<Ch>(0x80 | (codepoint & 0x3F)));
- }
- else {
- RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
- PutUnsafe(os, static_cast<Ch>(0xF0 | ((codepoint >> 18) & 0xFF)));
- PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 12) & 0x3F)));
- PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F)));
- PutUnsafe(os, static_cast<Ch>(0x80 | (codepoint & 0x3F)));
- }
- }
-
- template <typename InputStream>
- static bool Decode(InputStream& is, unsigned* codepoint) {
-#define COPY() c = is.Take(); *codepoint = (*codepoint << 6) | (static_cast<unsigned char>(c) & 0x3Fu)
-#define TRANS(mask) result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0)
-#define TAIL() COPY(); TRANS(0x70)
- typename InputStream::Ch c = is.Take();
- if (!(c & 0x80)) {
- *codepoint = static_cast<unsigned char>(c);
- return true;
- }
-
- unsigned char type = GetRange(static_cast<unsigned char>(c));
- if (type >= 32) {
- *codepoint = 0;
- } else {
- *codepoint = (0xFF >> type) & static_cast<unsigned char>(c);
- }
- bool result = true;
- switch (type) {
- case 2: TAIL(); return result;
- case 3: TAIL(); TAIL(); return result;
- case 4: COPY(); TRANS(0x50); TAIL(); return result;
- case 5: COPY(); TRANS(0x10); TAIL(); TAIL(); return result;
- case 6: TAIL(); TAIL(); TAIL(); return result;
- case 10: COPY(); TRANS(0x20); TAIL(); return result;
- case 11: COPY(); TRANS(0x60); TAIL(); TAIL(); return result;
- default: return false;
- }
-#undef COPY
-#undef TRANS
-#undef TAIL
- }
-
- template <typename InputStream, typename OutputStream>
- static bool Validate(InputStream& is, OutputStream& os) {
-#define COPY() os.Put(c = is.Take())
-#define TRANS(mask) result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0)
-#define TAIL() COPY(); TRANS(0x70)
- Ch c;
- COPY();
- if (!(c & 0x80))
- return true;
-
- bool result = true;
- switch (GetRange(static_cast<unsigned char>(c))) {
- case 2: TAIL(); return result;
- case 3: TAIL(); TAIL(); return result;
- case 4: COPY(); TRANS(0x50); TAIL(); return result;
- case 5: COPY(); TRANS(0x10); TAIL(); TAIL(); return result;
- case 6: TAIL(); TAIL(); TAIL(); return result;
- case 10: COPY(); TRANS(0x20); TAIL(); return result;
- case 11: COPY(); TRANS(0x60); TAIL(); TAIL(); return result;
- default: return false;
- }
-#undef COPY
-#undef TRANS
-#undef TAIL
- }
-
- static unsigned char GetRange(unsigned char c) {
- // Referring to DFA of http://bjoern.hoehrmann.de/utf-8/decoder/dfa/
- // With new mapping 1 -> 0x10, 7 -> 0x20, 9 -> 0x40, such that AND operation can test multiple types.
- static const unsigned char type[] = {
- 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,
- 0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,
- 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,
- 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
- 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,
- 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,
- 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8,
- };
- return type[c];
- }
-
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- typename InputByteStream::Ch c = Take(is);
- if (static_cast<unsigned char>(c) != 0xEFu) return c;
- c = is.Take();
- if (static_cast<unsigned char>(c) != 0xBBu) return c;
- c = is.Take();
- if (static_cast<unsigned char>(c) != 0xBFu) return c;
- c = is.Take();
- return c;
- }
-
- template <typename InputByteStream>
- static Ch Take(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- return static_cast<Ch>(is.Take());
- }
-
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(0xEFu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xBBu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xBFu));
- }
-
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, Ch c) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(c));
- }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// UTF16
-
-//! UTF-16 encoding.
-/*! http://en.wikipedia.org/wiki/UTF-16
- http://tools.ietf.org/html/rfc2781
- \tparam CharType Type for storing 16-bit UTF-16 data. Default is wchar_t. C++11 may use char16_t instead.
- \note implements Encoding concept
-
- \note For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness.
- For streaming, use UTF16LE and UTF16BE, which handle endianness.
-*/
-template<typename CharType = wchar_t>
-struct UTF16 {
- typedef CharType Ch;
- RAPIDJSON_STATIC_ASSERT(sizeof(Ch) >= 2);
-
- enum { supportUnicode = 1 };
-
- template<typename OutputStream>
- static void Encode(OutputStream& os, unsigned codepoint) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
- if (codepoint <= 0xFFFF) {
- RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair
- os.Put(static_cast<typename OutputStream::Ch>(codepoint));
- }
- else {
- RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
- unsigned v = codepoint - 0x10000;
- os.Put(static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800));
- os.Put((v & 0x3FF) | 0xDC00);
- }
- }
-
-
- template<typename OutputStream>
- static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
- if (codepoint <= 0xFFFF) {
- RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair
- PutUnsafe(os, static_cast<typename OutputStream::Ch>(codepoint));
- }
- else {
- RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
- unsigned v = codepoint - 0x10000;
- PutUnsafe(os, static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800));
- PutUnsafe(os, (v & 0x3FF) | 0xDC00);
- }
- }
-
- template <typename InputStream>
- static bool Decode(InputStream& is, unsigned* codepoint) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2);
- typename InputStream::Ch c = is.Take();
- if (c < 0xD800 || c > 0xDFFF) {
- *codepoint = static_cast<unsigned>(c);
- return true;
- }
- else if (c <= 0xDBFF) {
- *codepoint = (static_cast<unsigned>(c) & 0x3FF) << 10;
- c = is.Take();
- *codepoint |= (static_cast<unsigned>(c) & 0x3FF);
- *codepoint += 0x10000;
- return c >= 0xDC00 && c <= 0xDFFF;
- }
- return false;
- }
-
- template <typename InputStream, typename OutputStream>
- static bool Validate(InputStream& is, OutputStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2);
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2);
- typename InputStream::Ch c;
- os.Put(static_cast<typename OutputStream::Ch>(c = is.Take()));
- if (c < 0xD800 || c > 0xDFFF)
- return true;
- else if (c <= 0xDBFF) {
- os.Put(c = is.Take());
- return c >= 0xDC00 && c <= 0xDFFF;
- }
- return false;
- }
-};
-
-//! UTF-16 little endian encoding.
-template<typename CharType = wchar_t>
-struct UTF16LE : UTF16<CharType> {
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- CharType c = Take(is);
- return static_cast<uint16_t>(c) == 0xFEFFu ? Take(is) : c;
- }
-
- template <typename InputByteStream>
- static CharType Take(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- unsigned c = static_cast<uint8_t>(is.Take());
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
- return static_cast<CharType>(c);
- }
-
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
- }
-
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, CharType c) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(static_cast<unsigned>(c) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>((static_cast<unsigned>(c) >> 8) & 0xFFu));
- }
-};
-
-//! UTF-16 big endian encoding.
-template<typename CharType = wchar_t>
-struct UTF16BE : UTF16<CharType> {
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- CharType c = Take(is);
- return static_cast<uint16_t>(c) == 0xFEFFu ? Take(is) : c;
- }
-
- template <typename InputByteStream>
- static CharType Take(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- unsigned c = static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
- c |= static_cast<uint8_t>(is.Take());
- return static_cast<CharType>(c);
- }
-
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
- }
-
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, CharType c) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>((static_cast<unsigned>(c) >> 8) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>(static_cast<unsigned>(c) & 0xFFu));
- }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// UTF32
-
-//! UTF-32 encoding.
-/*! http://en.wikipedia.org/wiki/UTF-32
- \tparam CharType Type for storing 32-bit UTF-32 data. Default is unsigned. C++11 may use char32_t instead.
- \note implements Encoding concept
-
- \note For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness.
- For streaming, use UTF32LE and UTF32BE, which handle endianness.
-*/
-template<typename CharType = unsigned>
-struct UTF32 {
- typedef CharType Ch;
- RAPIDJSON_STATIC_ASSERT(sizeof(Ch) >= 4);
-
- enum { supportUnicode = 1 };
-
- template<typename OutputStream>
- static void Encode(OutputStream& os, unsigned codepoint) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 4);
- RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
- os.Put(codepoint);
- }
-
- template<typename OutputStream>
- static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 4);
- RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
- PutUnsafe(os, codepoint);
- }
-
- template <typename InputStream>
- static bool Decode(InputStream& is, unsigned* codepoint) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 4);
- Ch c = is.Take();
- *codepoint = c;
- return c <= 0x10FFFF;
- }
-
- template <typename InputStream, typename OutputStream>
- static bool Validate(InputStream& is, OutputStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 4);
- Ch c;
- os.Put(c = is.Take());
- return c <= 0x10FFFF;
- }
-};
-
-//! UTF-32 little endian enocoding.
-template<typename CharType = unsigned>
-struct UTF32LE : UTF32<CharType> {
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- CharType c = Take(is);
- return static_cast<uint32_t>(c) == 0x0000FEFFu ? Take(is) : c;
- }
-
- template <typename InputByteStream>
- static CharType Take(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- unsigned c = static_cast<uint8_t>(is.Take());
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 16;
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 24;
- return static_cast<CharType>(c);
- }
-
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
- os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
- }
-
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, CharType c) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(c & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>((c >> 8) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>((c >> 16) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>((c >> 24) & 0xFFu));
- }
-};
-
-//! UTF-32 big endian encoding.
-template<typename CharType = unsigned>
-struct UTF32BE : UTF32<CharType> {
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- CharType c = Take(is);
- return static_cast<uint32_t>(c) == 0x0000FEFFu ? Take(is) : c;
- }
-
- template <typename InputByteStream>
- static CharType Take(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- unsigned c = static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 24;
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 16;
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8;
- c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take()));
- return static_cast<CharType>(c);
- }
-
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
- os.Put(static_cast<typename OutputByteStream::Ch>(0x00u));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu));
- os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu));
- }
-
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, CharType c) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>((c >> 24) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>((c >> 16) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>((c >> 8) & 0xFFu));
- os.Put(static_cast<typename OutputByteStream::Ch>(c & 0xFFu));
- }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// ASCII
-
-//! ASCII encoding.
-/*! http://en.wikipedia.org/wiki/ASCII
- \tparam CharType Code unit for storing 7-bit ASCII data. Default is char.
- \note implements Encoding concept
-*/
-template<typename CharType = char>
-struct ASCII {
- typedef CharType Ch;
-
- enum { supportUnicode = 0 };
-
- template<typename OutputStream>
- static void Encode(OutputStream& os, unsigned codepoint) {
- RAPIDJSON_ASSERT(codepoint <= 0x7F);
- os.Put(static_cast<Ch>(codepoint & 0xFF));
- }
-
- template<typename OutputStream>
- static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
- RAPIDJSON_ASSERT(codepoint <= 0x7F);
- PutUnsafe(os, static_cast<Ch>(codepoint & 0xFF));
- }
-
- template <typename InputStream>
- static bool Decode(InputStream& is, unsigned* codepoint) {
- uint8_t c = static_cast<uint8_t>(is.Take());
- *codepoint = c;
- return c <= 0X7F;
- }
-
- template <typename InputStream, typename OutputStream>
- static bool Validate(InputStream& is, OutputStream& os) {
- uint8_t c = static_cast<uint8_t>(is.Take());
- os.Put(static_cast<typename OutputStream::Ch>(c));
- return c <= 0x7F;
- }
-
- template <typename InputByteStream>
- static CharType TakeBOM(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- uint8_t c = static_cast<uint8_t>(Take(is));
- return static_cast<Ch>(c);
- }
-
- template <typename InputByteStream>
- static Ch Take(InputByteStream& is) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1);
- return static_cast<Ch>(is.Take());
- }
-
- template <typename OutputByteStream>
- static void PutBOM(OutputByteStream& os) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- (void)os;
- }
-
- template <typename OutputByteStream>
- static void Put(OutputByteStream& os, Ch c) {
- RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1);
- os.Put(static_cast<typename OutputByteStream::Ch>(c));
- }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// AutoUTF
-
-//! Runtime-specified UTF encoding type of a stream.
-enum UTFType {
- kUTF8 = 0, //!< UTF-8.
- kUTF16LE = 1, //!< UTF-16 little endian.
- kUTF16BE = 2, //!< UTF-16 big endian.
- kUTF32LE = 3, //!< UTF-32 little endian.
- kUTF32BE = 4 //!< UTF-32 big endian.
-};
-
-//! Dynamically select encoding according to stream's runtime-specified UTF encoding type.
-/*! \note This class can be used with AutoUTFInputtStream and AutoUTFOutputStream, which provides GetType().
-*/
-template<typename CharType>
-struct AutoUTF {
- typedef CharType Ch;
-
- enum { supportUnicode = 1 };
-
-#define RAPIDJSON_ENCODINGS_FUNC(x) UTF8<Ch>::x, UTF16LE<Ch>::x, UTF16BE<Ch>::x, UTF32LE<Ch>::x, UTF32BE<Ch>::x
-
- template<typename OutputStream>
- RAPIDJSON_FORCEINLINE static void Encode(OutputStream& os, unsigned codepoint) {
- typedef void (*EncodeFunc)(OutputStream&, unsigned);
- static const EncodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Encode) };
- (*f[os.GetType()])(os, codepoint);
- }
-
- template<typename OutputStream>
- RAPIDJSON_FORCEINLINE static void EncodeUnsafe(OutputStream& os, unsigned codepoint) {
- typedef void (*EncodeFunc)(OutputStream&, unsigned);
- static const EncodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(EncodeUnsafe) };
- (*f[os.GetType()])(os, codepoint);
- }
-
- template <typename InputStream>
- RAPIDJSON_FORCEINLINE static bool Decode(InputStream& is, unsigned* codepoint) {
- typedef bool (*DecodeFunc)(InputStream&, unsigned*);
- static const DecodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Decode) };
- return (*f[is.GetType()])(is, codepoint);
- }
-
- template <typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool Validate(InputStream& is, OutputStream& os) {
- typedef bool (*ValidateFunc)(InputStream&, OutputStream&);
- static const ValidateFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Validate) };
- return (*f[is.GetType()])(is, os);
- }
-
-#undef RAPIDJSON_ENCODINGS_FUNC
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Transcoder
-
-//! Encoding conversion.
-template<typename SourceEncoding, typename TargetEncoding>
-struct Transcoder {
- //! Take one Unicode codepoint from source encoding, convert it to target encoding and put it to the output stream.
- template<typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool Transcode(InputStream& is, OutputStream& os) {
- unsigned codepoint;
- if (!SourceEncoding::Decode(is, &codepoint))
- return false;
- TargetEncoding::Encode(os, codepoint);
- return true;
- }
-
- template<typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool TranscodeUnsafe(InputStream& is, OutputStream& os) {
- unsigned codepoint;
- if (!SourceEncoding::Decode(is, &codepoint))
- return false;
- TargetEncoding::EncodeUnsafe(os, codepoint);
- return true;
- }
-
- //! Validate one Unicode codepoint from an encoded stream.
- template<typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool Validate(InputStream& is, OutputStream& os) {
- return Transcode(is, os); // Since source/target encoding is different, must transcode.
- }
-};
-
-// Forward declaration.
-template<typename Stream>
-inline void PutUnsafe(Stream& stream, typename Stream::Ch c);
-
-//! Specialization of Transcoder with same source and target encoding.
-template<typename Encoding>
-struct Transcoder<Encoding, Encoding> {
- template<typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool Transcode(InputStream& is, OutputStream& os) {
- os.Put(is.Take()); // Just copy one code unit. This semantic is different from primary template class.
- return true;
- }
-
- template<typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool TranscodeUnsafe(InputStream& is, OutputStream& os) {
- PutUnsafe(os, is.Take()); // Just copy one code unit. This semantic is different from primary template class.
- return true;
- }
-
- template<typename InputStream, typename OutputStream>
- RAPIDJSON_FORCEINLINE static bool Validate(InputStream& is, OutputStream& os) {
- return Encoding::Validate(is, os); // source/target encoding are the same
- }
-};
-
-RAPIDJSON_NAMESPACE_END
-
-#if defined(__GNUC__) || defined(_MSC_VER)
-RAPIDJSON_DIAG_POP
-#endif
-
-#endif // RAPIDJSON_ENCODINGS_H_
+// Tencent is pleased to support the open source community by making RapidJSON available. +// +// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved. +// +// Licensed under the MIT License (the "License"); you may not use this file except +// in compliance with the License. You may obtain a copy of the License at +// +// http://opensource.org/licenses/MIT +// +// 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 RAPIDJSON_ENCODINGS_H_ +#define RAPIDJSON_ENCODINGS_H_ + +#include "rapidjson.h" + +#ifdef _MSC_VER +RAPIDJSON_DIAG_PUSH +RAPIDJSON_DIAG_OFF(4244) // conversion from 'type1' to 'type2', possible loss of data +RAPIDJSON_DIAG_OFF(4702) // unreachable code +#elif defined(__GNUC__) +RAPIDJSON_DIAG_PUSH +RAPIDJSON_DIAG_OFF(effc++) +RAPIDJSON_DIAG_OFF(overflow) +#endif + +RAPIDJSON_NAMESPACE_BEGIN + +/////////////////////////////////////////////////////////////////////////////// +// Encoding + +/*! \class rapidjson::Encoding + \brief Concept for encoding of Unicode characters. + +\code +concept Encoding { + typename Ch; //! Type of character. A "character" is actually a code unit in unicode's definition. + + enum { supportUnicode = 1 }; // or 0 if not supporting unicode + + //! \brief Encode a Unicode codepoint to an output stream. + //! \param os Output stream. + //! \param codepoint An unicode codepoint, ranging from 0x0 to 0x10FFFF inclusively. + template<typename OutputStream> + static void Encode(OutputStream& os, unsigned codepoint); + + //! \brief Decode a Unicode codepoint from an input stream. + //! \param is Input stream. + //! \param codepoint Output of the unicode codepoint. + //! \return true if a valid codepoint can be decoded from the stream. + template <typename InputStream> + static bool Decode(InputStream& is, unsigned* codepoint); + + //! \brief Validate one Unicode codepoint from an encoded stream. + //! \param is Input stream to obtain codepoint. + //! \param os Output for copying one codepoint. + //! \return true if it is valid. + //! \note This function just validating and copying the codepoint without actually decode it. + template <typename InputStream, typename OutputStream> + static bool Validate(InputStream& is, OutputStream& os); + + // The following functions are deal with byte streams. + + //! Take a character from input byte stream, skip BOM if exist. + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is); + + //! Take a character from input byte stream. + template <typename InputByteStream> + static Ch Take(InputByteStream& is); + + //! Put BOM to output byte stream. + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os); + + //! Put a character to output byte stream. + template <typename OutputByteStream> + static void Put(OutputByteStream& os, Ch c); +}; +\endcode +*/ + +/////////////////////////////////////////////////////////////////////////////// +// UTF8 + +//! UTF-8 encoding. +/*! http://en.wikipedia.org/wiki/UTF-8 + http://tools.ietf.org/html/rfc3629 + \tparam CharType Code unit for storing 8-bit UTF-8 data. Default is char. + \note implements Encoding concept +*/ +template<typename CharType = char> +struct UTF8 { + typedef CharType Ch; + + enum { supportUnicode = 1 }; + + template<typename OutputStream> + static void Encode(OutputStream& os, unsigned codepoint) { + if (codepoint <= 0x7F) + os.Put(static_cast<Ch>(codepoint & 0xFF)); + else if (codepoint <= 0x7FF) { + os.Put(static_cast<Ch>(0xC0 | ((codepoint >> 6) & 0xFF))); + os.Put(static_cast<Ch>(0x80 | ((codepoint & 0x3F)))); + } + else if (codepoint <= 0xFFFF) { + os.Put(static_cast<Ch>(0xE0 | ((codepoint >> 12) & 0xFF))); + os.Put(static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F))); + os.Put(static_cast<Ch>(0x80 | (codepoint & 0x3F))); + } + else { + RAPIDJSON_ASSERT(codepoint <= 0x10FFFF); + os.Put(static_cast<Ch>(0xF0 | ((codepoint >> 18) & 0xFF))); + os.Put(static_cast<Ch>(0x80 | ((codepoint >> 12) & 0x3F))); + os.Put(static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F))); + os.Put(static_cast<Ch>(0x80 | (codepoint & 0x3F))); + } + } + + template<typename OutputStream> + static void EncodeUnsafe(OutputStream& os, unsigned codepoint) { + if (codepoint <= 0x7F) + PutUnsafe(os, static_cast<Ch>(codepoint & 0xFF)); + else if (codepoint <= 0x7FF) { + PutUnsafe(os, static_cast<Ch>(0xC0 | ((codepoint >> 6) & 0xFF))); + PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint & 0x3F)))); + } + else if (codepoint <= 0xFFFF) { + PutUnsafe(os, static_cast<Ch>(0xE0 | ((codepoint >> 12) & 0xFF))); + PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F))); + PutUnsafe(os, static_cast<Ch>(0x80 | (codepoint & 0x3F))); + } + else { + RAPIDJSON_ASSERT(codepoint <= 0x10FFFF); + PutUnsafe(os, static_cast<Ch>(0xF0 | ((codepoint >> 18) & 0xFF))); + PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 12) & 0x3F))); + PutUnsafe(os, static_cast<Ch>(0x80 | ((codepoint >> 6) & 0x3F))); + PutUnsafe(os, static_cast<Ch>(0x80 | (codepoint & 0x3F))); + } + } + + template <typename InputStream> + static bool Decode(InputStream& is, unsigned* codepoint) { +#define COPY() c = is.Take(); *codepoint = (*codepoint << 6) | (static_cast<unsigned char>(c) & 0x3Fu) +#define TRANS(mask) result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0) +#define TAIL() COPY(); TRANS(0x70) + typename InputStream::Ch c = is.Take(); + if (!(c & 0x80)) { + *codepoint = static_cast<unsigned char>(c); + return true; + } + + unsigned char type = GetRange(static_cast<unsigned char>(c)); + if (type >= 32) { + *codepoint = 0; + } else { + *codepoint = (0xFF >> type) & static_cast<unsigned char>(c); + } + bool result = true; + switch (type) { + case 2: TAIL(); return result; + case 3: TAIL(); TAIL(); return result; + case 4: COPY(); TRANS(0x50); TAIL(); return result; + case 5: COPY(); TRANS(0x10); TAIL(); TAIL(); return result; + case 6: TAIL(); TAIL(); TAIL(); return result; + case 10: COPY(); TRANS(0x20); TAIL(); return result; + case 11: COPY(); TRANS(0x60); TAIL(); TAIL(); return result; + default: return false; + } +#undef COPY +#undef TRANS +#undef TAIL + } + + template <typename InputStream, typename OutputStream> + static bool Validate(InputStream& is, OutputStream& os) { +#define COPY() os.Put(c = is.Take()) +#define TRANS(mask) result &= ((GetRange(static_cast<unsigned char>(c)) & mask) != 0) +#define TAIL() COPY(); TRANS(0x70) + Ch c; + COPY(); + if (!(c & 0x80)) + return true; + + bool result = true; + switch (GetRange(static_cast<unsigned char>(c))) { + case 2: TAIL(); return result; + case 3: TAIL(); TAIL(); return result; + case 4: COPY(); TRANS(0x50); TAIL(); return result; + case 5: COPY(); TRANS(0x10); TAIL(); TAIL(); return result; + case 6: TAIL(); TAIL(); TAIL(); return result; + case 10: COPY(); TRANS(0x20); TAIL(); return result; + case 11: COPY(); TRANS(0x60); TAIL(); TAIL(); return result; + default: return false; + } +#undef COPY +#undef TRANS +#undef TAIL + } + + static unsigned char GetRange(unsigned char c) { + // Referring to DFA of http://bjoern.hoehrmann.de/utf-8/decoder/dfa/ + // With new mapping 1 -> 0x10, 7 -> 0x20, 9 -> 0x40, such that AND operation can test multiple types. + static const unsigned char type[] = { + 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, + 0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10, + 0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x40, + 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, + 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, + 8,8,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, + 10,3,3,3,3,3,3,3,3,3,3,3,3,4,3,3, 11,6,6,6,5,8,8,8,8,8,8,8,8,8,8,8, + }; + return type[c]; + } + + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + typename InputByteStream::Ch c = Take(is); + if (static_cast<unsigned char>(c) != 0xEFu) return c; + c = is.Take(); + if (static_cast<unsigned char>(c) != 0xBBu) return c; + c = is.Take(); + if (static_cast<unsigned char>(c) != 0xBFu) return c; + c = is.Take(); + return c; + } + + template <typename InputByteStream> + static Ch Take(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + return static_cast<Ch>(is.Take()); + } + + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(0xEFu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xBBu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xBFu)); + } + + template <typename OutputByteStream> + static void Put(OutputByteStream& os, Ch c) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(c)); + } +}; + +/////////////////////////////////////////////////////////////////////////////// +// UTF16 + +//! UTF-16 encoding. +/*! http://en.wikipedia.org/wiki/UTF-16 + http://tools.ietf.org/html/rfc2781 + \tparam CharType Type for storing 16-bit UTF-16 data. Default is wchar_t. C++11 may use char16_t instead. + \note implements Encoding concept + + \note For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness. + For streaming, use UTF16LE and UTF16BE, which handle endianness. +*/ +template<typename CharType = wchar_t> +struct UTF16 { + typedef CharType Ch; + RAPIDJSON_STATIC_ASSERT(sizeof(Ch) >= 2); + + enum { supportUnicode = 1 }; + + template<typename OutputStream> + static void Encode(OutputStream& os, unsigned codepoint) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2); + if (codepoint <= 0xFFFF) { + RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair + os.Put(static_cast<typename OutputStream::Ch>(codepoint)); + } + else { + RAPIDJSON_ASSERT(codepoint <= 0x10FFFF); + unsigned v = codepoint - 0x10000; + os.Put(static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800)); + os.Put((v & 0x3FF) | 0xDC00); + } + } + + + template<typename OutputStream> + static void EncodeUnsafe(OutputStream& os, unsigned codepoint) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2); + if (codepoint <= 0xFFFF) { + RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair + PutUnsafe(os, static_cast<typename OutputStream::Ch>(codepoint)); + } + else { + RAPIDJSON_ASSERT(codepoint <= 0x10FFFF); + unsigned v = codepoint - 0x10000; + PutUnsafe(os, static_cast<typename OutputStream::Ch>((v >> 10) | 0xD800)); + PutUnsafe(os, (v & 0x3FF) | 0xDC00); + } + } + + template <typename InputStream> + static bool Decode(InputStream& is, unsigned* codepoint) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2); + typename InputStream::Ch c = is.Take(); + if (c < 0xD800 || c > 0xDFFF) { + *codepoint = static_cast<unsigned>(c); + return true; + } + else if (c <= 0xDBFF) { + *codepoint = (static_cast<unsigned>(c) & 0x3FF) << 10; + c = is.Take(); + *codepoint |= (static_cast<unsigned>(c) & 0x3FF); + *codepoint += 0x10000; + return c >= 0xDC00 && c <= 0xDFFF; + } + return false; + } + + template <typename InputStream, typename OutputStream> + static bool Validate(InputStream& is, OutputStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 2); + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 2); + typename InputStream::Ch c; + os.Put(static_cast<typename OutputStream::Ch>(c = is.Take())); + if (c < 0xD800 || c > 0xDFFF) + return true; + else if (c <= 0xDBFF) { + os.Put(c = is.Take()); + return c >= 0xDC00 && c <= 0xDFFF; + } + return false; + } +}; + +//! UTF-16 little endian encoding. +template<typename CharType = wchar_t> +struct UTF16LE : UTF16<CharType> { + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + CharType c = Take(is); + return static_cast<uint16_t>(c) == 0xFEFFu ? Take(is) : c; + } + + template <typename InputByteStream> + static CharType Take(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + unsigned c = static_cast<uint8_t>(is.Take()); + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8; + return static_cast<CharType>(c); + } + + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu)); + } + + template <typename OutputByteStream> + static void Put(OutputByteStream& os, CharType c) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(static_cast<unsigned>(c) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>((static_cast<unsigned>(c) >> 8) & 0xFFu)); + } +}; + +//! UTF-16 big endian encoding. +template<typename CharType = wchar_t> +struct UTF16BE : UTF16<CharType> { + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + CharType c = Take(is); + return static_cast<uint16_t>(c) == 0xFEFFu ? Take(is) : c; + } + + template <typename InputByteStream> + static CharType Take(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + unsigned c = static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8; + c |= static_cast<uint8_t>(is.Take()); + return static_cast<CharType>(c); + } + + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu)); + } + + template <typename OutputByteStream> + static void Put(OutputByteStream& os, CharType c) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>((static_cast<unsigned>(c) >> 8) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>(static_cast<unsigned>(c) & 0xFFu)); + } +}; + +/////////////////////////////////////////////////////////////////////////////// +// UTF32 + +//! UTF-32 encoding. +/*! http://en.wikipedia.org/wiki/UTF-32 + \tparam CharType Type for storing 32-bit UTF-32 data. Default is unsigned. C++11 may use char32_t instead. + \note implements Encoding concept + + \note For in-memory access, no need to concern endianness. The code units and code points are represented by CPU's endianness. + For streaming, use UTF32LE and UTF32BE, which handle endianness. +*/ +template<typename CharType = unsigned> +struct UTF32 { + typedef CharType Ch; + RAPIDJSON_STATIC_ASSERT(sizeof(Ch) >= 4); + + enum { supportUnicode = 1 }; + + template<typename OutputStream> + static void Encode(OutputStream& os, unsigned codepoint) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 4); + RAPIDJSON_ASSERT(codepoint <= 0x10FFFF); + os.Put(codepoint); + } + + template<typename OutputStream> + static void EncodeUnsafe(OutputStream& os, unsigned codepoint) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputStream::Ch) >= 4); + RAPIDJSON_ASSERT(codepoint <= 0x10FFFF); + PutUnsafe(os, codepoint); + } + + template <typename InputStream> + static bool Decode(InputStream& is, unsigned* codepoint) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 4); + Ch c = is.Take(); + *codepoint = c; + return c <= 0x10FFFF; + } + + template <typename InputStream, typename OutputStream> + static bool Validate(InputStream& is, OutputStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputStream::Ch) >= 4); + Ch c; + os.Put(c = is.Take()); + return c <= 0x10FFFF; + } +}; + +//! UTF-32 little endian enocoding. +template<typename CharType = unsigned> +struct UTF32LE : UTF32<CharType> { + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + CharType c = Take(is); + return static_cast<uint32_t>(c) == 0x0000FEFFu ? Take(is) : c; + } + + template <typename InputByteStream> + static CharType Take(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + unsigned c = static_cast<uint8_t>(is.Take()); + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8; + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 16; + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 24; + return static_cast<CharType>(c); + } + + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0x00u)); + os.Put(static_cast<typename OutputByteStream::Ch>(0x00u)); + } + + template <typename OutputByteStream> + static void Put(OutputByteStream& os, CharType c) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(c & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>((c >> 8) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>((c >> 16) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>((c >> 24) & 0xFFu)); + } +}; + +//! UTF-32 big endian encoding. +template<typename CharType = unsigned> +struct UTF32BE : UTF32<CharType> { + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + CharType c = Take(is); + return static_cast<uint32_t>(c) == 0x0000FEFFu ? Take(is) : c; + } + + template <typename InputByteStream> + static CharType Take(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + unsigned c = static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 24; + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 16; + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())) << 8; + c |= static_cast<unsigned>(static_cast<uint8_t>(is.Take())); + return static_cast<CharType>(c); + } + + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(0x00u)); + os.Put(static_cast<typename OutputByteStream::Ch>(0x00u)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFEu)); + os.Put(static_cast<typename OutputByteStream::Ch>(0xFFu)); + } + + template <typename OutputByteStream> + static void Put(OutputByteStream& os, CharType c) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>((c >> 24) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>((c >> 16) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>((c >> 8) & 0xFFu)); + os.Put(static_cast<typename OutputByteStream::Ch>(c & 0xFFu)); + } +}; + +/////////////////////////////////////////////////////////////////////////////// +// ASCII + +//! ASCII encoding. +/*! http://en.wikipedia.org/wiki/ASCII + \tparam CharType Code unit for storing 7-bit ASCII data. Default is char. + \note implements Encoding concept +*/ +template<typename CharType = char> +struct ASCII { + typedef CharType Ch; + + enum { supportUnicode = 0 }; + + template<typename OutputStream> + static void Encode(OutputStream& os, unsigned codepoint) { + RAPIDJSON_ASSERT(codepoint <= 0x7F); + os.Put(static_cast<Ch>(codepoint & 0xFF)); + } + + template<typename OutputStream> + static void EncodeUnsafe(OutputStream& os, unsigned codepoint) { + RAPIDJSON_ASSERT(codepoint <= 0x7F); + PutUnsafe(os, static_cast<Ch>(codepoint & 0xFF)); + } + + template <typename InputStream> + static bool Decode(InputStream& is, unsigned* codepoint) { + uint8_t c = static_cast<uint8_t>(is.Take()); + *codepoint = c; + return c <= 0X7F; + } + + template <typename InputStream, typename OutputStream> + static bool Validate(InputStream& is, OutputStream& os) { + uint8_t c = static_cast<uint8_t>(is.Take()); + os.Put(static_cast<typename OutputStream::Ch>(c)); + return c <= 0x7F; + } + + template <typename InputByteStream> + static CharType TakeBOM(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + uint8_t c = static_cast<uint8_t>(Take(is)); + return static_cast<Ch>(c); + } + + template <typename InputByteStream> + static Ch Take(InputByteStream& is) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename InputByteStream::Ch) == 1); + return static_cast<Ch>(is.Take()); + } + + template <typename OutputByteStream> + static void PutBOM(OutputByteStream& os) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + (void)os; + } + + template <typename OutputByteStream> + static void Put(OutputByteStream& os, Ch c) { + RAPIDJSON_STATIC_ASSERT(sizeof(typename OutputByteStream::Ch) == 1); + os.Put(static_cast<typename OutputByteStream::Ch>(c)); + } +}; + +/////////////////////////////////////////////////////////////////////////////// +// AutoUTF + +//! Runtime-specified UTF encoding type of a stream. +enum UTFType { + kUTF8 = 0, //!< UTF-8. + kUTF16LE = 1, //!< UTF-16 little endian. + kUTF16BE = 2, //!< UTF-16 big endian. + kUTF32LE = 3, //!< UTF-32 little endian. + kUTF32BE = 4 //!< UTF-32 big endian. +}; + +//! Dynamically select encoding according to stream's runtime-specified UTF encoding type. +/*! \note This class can be used with AutoUTFInputtStream and AutoUTFOutputStream, which provides GetType(). +*/ +template<typename CharType> +struct AutoUTF { + typedef CharType Ch; + + enum { supportUnicode = 1 }; + +#define RAPIDJSON_ENCODINGS_FUNC(x) UTF8<Ch>::x, UTF16LE<Ch>::x, UTF16BE<Ch>::x, UTF32LE<Ch>::x, UTF32BE<Ch>::x + + template<typename OutputStream> + RAPIDJSON_FORCEINLINE static void Encode(OutputStream& os, unsigned codepoint) { + typedef void (*EncodeFunc)(OutputStream&, unsigned); + static const EncodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Encode) }; + (*f[os.GetType()])(os, codepoint); + } + + template<typename OutputStream> + RAPIDJSON_FORCEINLINE static void EncodeUnsafe(OutputStream& os, unsigned codepoint) { + typedef void (*EncodeFunc)(OutputStream&, unsigned); + static const EncodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(EncodeUnsafe) }; + (*f[os.GetType()])(os, codepoint); + } + + template <typename InputStream> + RAPIDJSON_FORCEINLINE static bool Decode(InputStream& is, unsigned* codepoint) { + typedef bool (*DecodeFunc)(InputStream&, unsigned*); + static const DecodeFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Decode) }; + return (*f[is.GetType()])(is, codepoint); + } + + template <typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool Validate(InputStream& is, OutputStream& os) { + typedef bool (*ValidateFunc)(InputStream&, OutputStream&); + static const ValidateFunc f[] = { RAPIDJSON_ENCODINGS_FUNC(Validate) }; + return (*f[is.GetType()])(is, os); + } + +#undef RAPIDJSON_ENCODINGS_FUNC +}; + +/////////////////////////////////////////////////////////////////////////////// +// Transcoder + +//! Encoding conversion. +template<typename SourceEncoding, typename TargetEncoding> +struct Transcoder { + //! Take one Unicode codepoint from source encoding, convert it to target encoding and put it to the output stream. + template<typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool Transcode(InputStream& is, OutputStream& os) { + unsigned codepoint; + if (!SourceEncoding::Decode(is, &codepoint)) + return false; + TargetEncoding::Encode(os, codepoint); + return true; + } + + template<typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool TranscodeUnsafe(InputStream& is, OutputStream& os) { + unsigned codepoint; + if (!SourceEncoding::Decode(is, &codepoint)) + return false; + TargetEncoding::EncodeUnsafe(os, codepoint); + return true; + } + + //! Validate one Unicode codepoint from an encoded stream. + template<typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool Validate(InputStream& is, OutputStream& os) { + return Transcode(is, os); // Since source/target encoding is different, must transcode. + } +}; + +// Forward declaration. +template<typename Stream> +inline void PutUnsafe(Stream& stream, typename Stream::Ch c); + +//! Specialization of Transcoder with same source and target encoding. +template<typename Encoding> +struct Transcoder<Encoding, Encoding> { + template<typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool Transcode(InputStream& is, OutputStream& os) { + os.Put(is.Take()); // Just copy one code unit. This semantic is different from primary template class. + return true; + } + + template<typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool TranscodeUnsafe(InputStream& is, OutputStream& os) { + PutUnsafe(os, is.Take()); // Just copy one code unit. This semantic is different from primary template class. + return true; + } + + template<typename InputStream, typename OutputStream> + RAPIDJSON_FORCEINLINE static bool Validate(InputStream& is, OutputStream& os) { + return Encoding::Validate(is, os); // source/target encoding are the same + } +}; + +RAPIDJSON_NAMESPACE_END + +#if defined(__GNUC__) || defined(_MSC_VER) +RAPIDJSON_DIAG_POP +#endif + +#endif // RAPIDJSON_ENCODINGS_H_ |