+++ /dev/null
-// 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_
projects / ceph.git / blobdiff