1 // Tencent is pleased to support the open source community by making RapidJSON available. 2 // 3 // Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved. 4 // 5 // Licensed under the MIT License (the "License"); you may not use this file except 6 // in compliance with the License. You may obtain a copy of the License at 7 // 8 // http://opensource.org/licenses/MIT 9 // 10 // Unless required by applicable law or agreed to in writing, software distributed 11 // under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR 12 // CONDITIONS OF ANY KIND, either express or implied. See the License for the 13 // specific language governing permissions and limitations under the License. 14 15 #ifndef RAPIDJSON_RAPIDJSON_H_ 16 #define RAPIDJSON_RAPIDJSON_H_ 17 18 /*!\file rapidjson.h 19 \brief common definitions and configuration 20 21 \see RAPIDJSON_CONFIG 22 */ 23 24 /*! \defgroup RAPIDJSON_CONFIG RapidJSON configuration 25 \brief Configuration macros for library features 26 27 Some RapidJSON features are configurable to adapt the library to a wide 28 variety of platforms, environments and usage scenarios. Most of the 29 features can be configured in terms of overriden or predefined 30 preprocessor macros at compile-time. 31 32 Some additional customization is available in the \ref RAPIDJSON_ERRORS APIs. 33 34 \note These macros should be given on the compiler command-line 35 (where applicable) to avoid inconsistent values when compiling 36 different translation units of a single application. 37 */ 38 39 #include <cstdlib> // malloc(), realloc(), free(), size_t 40 #include <cstring> // memset(), memcpy(), memmove(), memcmp() 41 42 /////////////////////////////////////////////////////////////////////////////// 43 // RAPIDJSON_VERSION_STRING 44 // 45 // ALWAYS synchronize the following 3 macros with corresponding variables in /CMakeLists.txt. 46 // 47 48 //!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN 49 // token stringification 50 #define RAPIDJSON_STRINGIFY(x) RAPIDJSON_DO_STRINGIFY(x) 51 #define RAPIDJSON_DO_STRINGIFY(x) #x 52 //!@endcond 53 54 /*! \def RAPIDJSON_MAJOR_VERSION 55 \ingroup RAPIDJSON_CONFIG 56 \brief Major version of RapidJSON in integer. 57 */ 58 /*! \def RAPIDJSON_MINOR_VERSION 59 \ingroup RAPIDJSON_CONFIG 60 \brief Minor version of RapidJSON in integer. 61 */ 62 /*! \def RAPIDJSON_PATCH_VERSION 63 \ingroup RAPIDJSON_CONFIG 64 \brief Patch version of RapidJSON in integer. 65 */ 66 /*! \def RAPIDJSON_VERSION_STRING 67 \ingroup RAPIDJSON_CONFIG 68 \brief Version of RapidJSON in "<major>.<minor>.<patch>" string format. 69 */ 70 #define RAPIDJSON_MAJOR_VERSION 1 71 #define RAPIDJSON_MINOR_VERSION 0 72 #define RAPIDJSON_PATCH_VERSION 2 73 #define RAPIDJSON_VERSION_STRING \ 74 RAPIDJSON_STRINGIFY(RAPIDJSON_MAJOR_VERSION.RAPIDJSON_MINOR_VERSION.RAPIDJSON_PATCH_VERSION) 75 76 /////////////////////////////////////////////////////////////////////////////// 77 // RAPIDJSON_NAMESPACE_(BEGIN|END) 78 /*! \def RAPIDJSON_NAMESPACE 79 \ingroup RAPIDJSON_CONFIG 80 \brief provide custom rapidjson namespace 81 82 In order to avoid symbol clashes and/or "One Definition Rule" errors 83 between multiple inclusions of (different versions of) RapidJSON in 84 a single binary, users can customize the name of the main RapidJSON 85 namespace. 86 87 In case of a single nesting level, defining \c RAPIDJSON_NAMESPACE 88 to a custom name (e.g. \c MyRapidJSON) is sufficient. If multiple 89 levels are needed, both \ref RAPIDJSON_NAMESPACE_BEGIN and \ref 90 RAPIDJSON_NAMESPACE_END need to be defined as well: 91 92 \code 93 // in some .cpp file 94 #define RAPIDJSON_NAMESPACE my::rapidjson 95 #define RAPIDJSON_NAMESPACE_BEGIN namespace my { namespace rapidjson { 96 #define RAPIDJSON_NAMESPACE_END } } 97 #include "rapidjson/..." 98 \endcode 99 100 \see rapidjson 101 */ 102 /*! \def RAPIDJSON_NAMESPACE_BEGIN 103 \ingroup RAPIDJSON_CONFIG 104 \brief provide custom rapidjson namespace (opening expression) 105 \see RAPIDJSON_NAMESPACE 106 */ 107 /*! \def RAPIDJSON_NAMESPACE_END 108 \ingroup RAPIDJSON_CONFIG 109 \brief provide custom rapidjson namespace (closing expression) 110 \see RAPIDJSON_NAMESPACE 111 */ 112 #ifndef RAPIDJSON_NAMESPACE 113 #define RAPIDJSON_NAMESPACE rapidjson 114 #endif 115 #ifndef RAPIDJSON_NAMESPACE_BEGIN 116 #define RAPIDJSON_NAMESPACE_BEGIN namespace RAPIDJSON_NAMESPACE { 117 #endif 118 #ifndef RAPIDJSON_NAMESPACE_END 119 #define RAPIDJSON_NAMESPACE_END } 120 #endif 121 122 /////////////////////////////////////////////////////////////////////////////// 123 // RAPIDJSON_NO_INT64DEFINE 124 125 /*! \def RAPIDJSON_NO_INT64DEFINE 126 \ingroup RAPIDJSON_CONFIG 127 \brief Use external 64-bit integer types. 128 129 RapidJSON requires the 64-bit integer types \c int64_t and \c uint64_t types 130 to be available at global scope. 131 132 If users have their own definition, define RAPIDJSON_NO_INT64DEFINE to 133 prevent RapidJSON from defining its own types. 134 */ 135 #ifndef RAPIDJSON_NO_INT64DEFINE 136 //!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN 137 #ifdef _MSC_VER 138 #include "msinttypes/stdint.h" 139 #include "msinttypes/inttypes.h" 140 #else 141 // Other compilers should have this. 142 #include <stdint.h> 143 #include <inttypes.h> 144 #endif 145 //!@endcond 146 #ifdef RAPIDJSON_DOXYGEN_RUNNING 147 #define RAPIDJSON_NO_INT64DEFINE 148 #endif 149 #endif // RAPIDJSON_NO_INT64TYPEDEF 150 151 /////////////////////////////////////////////////////////////////////////////// 152 // RAPIDJSON_FORCEINLINE 153 154 #ifndef RAPIDJSON_FORCEINLINE 155 //!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN 156 #if defined(_MSC_VER) && !defined(NDEBUG) 157 #define RAPIDJSON_FORCEINLINE __forceinline 158 #elif defined(__GNUC__) && __GNUC__ >= 4 && !defined(NDEBUG) 159 #define RAPIDJSON_FORCEINLINE __attribute__((always_inline)) 160 #else 161 #define RAPIDJSON_FORCEINLINE 162 #endif 163 //!@endcond 164 #endif // RAPIDJSON_FORCEINLINE 165 166 /////////////////////////////////////////////////////////////////////////////// 167 // RAPIDJSON_ENDIAN 168 #define RAPIDJSON_LITTLEENDIAN 0 //!< Little endian machine 169 #define RAPIDJSON_BIGENDIAN 1 //!< Big endian machine 170 171 //! Endianness of the machine. 172 /*! 173 \def RAPIDJSON_ENDIAN 174 \ingroup RAPIDJSON_CONFIG 175 176 GCC 4.6 provided macro for detecting endianness of the target machine. But other 177 compilers may not have this. User can define RAPIDJSON_ENDIAN to either 178 \ref RAPIDJSON_LITTLEENDIAN or \ref RAPIDJSON_BIGENDIAN. 179 180 Default detection implemented with reference to 181 \li https://gcc.gnu.org/onlinedocs/gcc-4.6.0/cpp/Common-Predefined-Macros.html 182 \li http://www.boost.org/doc/libs/1_42_0/boost/detail/endian.hpp 183 */ 184 #ifndef RAPIDJSON_ENDIAN 185 // Detect with GCC 4.6's macro 186 # ifdef __BYTE_ORDER__ 187 # if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__ 188 # define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN 189 # elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__ 190 # define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN 191 # else 192 # error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN. 193 # endif // __BYTE_ORDER__ 194 // Detect with GLIBC's endian.h 195 # elif defined(__GLIBC__) 196 # include <endian.h> 197 # if (__BYTE_ORDER == __LITTLE_ENDIAN) 198 # define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN 199 # elif (__BYTE_ORDER == __BIG_ENDIAN) 200 # define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN 201 # else 202 # error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN. 203 # endif // __GLIBC__ 204 // Detect with _LITTLE_ENDIAN and _BIG_ENDIAN macro 205 # elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN) 206 # define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN 207 # elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN) 208 # define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN 209 // Detect with architecture macros 210 # elif defined(__sparc) || defined(__sparc__) || defined(_POWER) || defined(__powerpc__) || defined(__ppc__) || defined(__hpux) || defined(__hppa) || defined(_MIPSEB) || defined(_POWER) || defined(__s390__) 211 # define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN 212 # elif defined(__i386__) || defined(__alpha__) || defined(__ia64) || defined(__ia64__) || defined(_M_IX86) || defined(_M_IA64) || defined(_M_ALPHA) || defined(__amd64) || defined(__amd64__) || defined(_M_AMD64) || defined(__x86_64) || defined(__x86_64__) || defined(_M_X64) || defined(__bfin__) 213 # define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN 214 # elif defined(RAPIDJSON_DOXYGEN_RUNNING) 215 # define RAPIDJSON_ENDIAN 216 # else 217 # error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN. 218 # endif 219 #endif // RAPIDJSON_ENDIAN 220 221 /////////////////////////////////////////////////////////////////////////////// 222 // RAPIDJSON_64BIT 223 224 //! Whether using 64-bit architecture 225 #ifndef RAPIDJSON_64BIT 226 #if defined(__LP64__) || defined(_WIN64) || defined(__EMSCRIPTEN__) 227 #define RAPIDJSON_64BIT 1 228 #else 229 #define RAPIDJSON_64BIT 0 230 #endif 231 #endif // RAPIDJSON_64BIT 232 233 /////////////////////////////////////////////////////////////////////////////// 234 // RAPIDJSON_ALIGN 235 236 //! Data alignment of the machine. 237 /*! \ingroup RAPIDJSON_CONFIG 238 \param x pointer to align 239 240 Some machines require strict data alignment. Currently the default uses 4 bytes 241 alignment. User can customize by defining the RAPIDJSON_ALIGN function macro. 242 */ 243 #ifndef RAPIDJSON_ALIGN 244 #if RAPIDJSON_64BIT == 1 245 #define RAPIDJSON_ALIGN(x) (((x) + static_cast<uint64_t>(7u)) & ~static_cast<uint64_t>(7u)) 246 #else 247 #define RAPIDJSON_ALIGN(x) (((x) + 3u) & ~3u) 248 #endif 249 #endif 250 251 /////////////////////////////////////////////////////////////////////////////// 252 // RAPIDJSON_UINT64_C2 253 254 //! Construct a 64-bit literal by a pair of 32-bit integer. 255 /*! 256 64-bit literal with or without ULL suffix is prone to compiler warnings. 257 UINT64_C() is C macro which cause compilation problems. 258 Use this macro to define 64-bit constants by a pair of 32-bit integer. 259 */ 260 #ifndef RAPIDJSON_UINT64_C2 261 #define RAPIDJSON_UINT64_C2(high32, low32) ((static_cast<uint64_t>(high32) << 32) | static_cast<uint64_t>(low32)) 262 #endif 263 264 /////////////////////////////////////////////////////////////////////////////// 265 // RAPIDJSON_SSE2/RAPIDJSON_SSE42/RAPIDJSON_SIMD 266 267 /*! \def RAPIDJSON_SIMD 268 \ingroup RAPIDJSON_CONFIG 269 \brief Enable SSE2/SSE4.2 optimization. 270 271 RapidJSON supports optimized implementations for some parsing operations 272 based on the SSE2 or SSE4.2 SIMD extensions on modern Intel-compatible 273 processors. 274 275 To enable these optimizations, two different symbols can be defined; 276 \code 277 // Enable SSE2 optimization. 278 #define RAPIDJSON_SSE2 279 280 // Enable SSE4.2 optimization. 281 #define RAPIDJSON_SSE42 282 \endcode 283 284 \c RAPIDJSON_SSE42 takes precedence, if both are defined. 285 286 If any of these symbols is defined, RapidJSON defines the macro 287 \c RAPIDJSON_SIMD to indicate the availability of the optimized code. 288 */ 289 #if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42) \ 290 || defined(RAPIDJSON_DOXYGEN_RUNNING) 291 #define RAPIDJSON_SIMD 292 #endif 293 294 /////////////////////////////////////////////////////////////////////////////// 295 // RAPIDJSON_NO_SIZETYPEDEFINE 296 297 #ifndef RAPIDJSON_NO_SIZETYPEDEFINE 298 /*! \def RAPIDJSON_NO_SIZETYPEDEFINE 299 \ingroup RAPIDJSON_CONFIG 300 \brief User-provided \c SizeType definition. 301 302 In order to avoid using 32-bit size types for indexing strings and arrays, 303 define this preprocessor symbol and provide the type rapidjson::SizeType 304 before including RapidJSON: 305 \code 306 #define RAPIDJSON_NO_SIZETYPEDEFINE 307 namespace rapidjson { typedef ::std::size_t SizeType; } 308 #include "rapidjson/..." 309 \endcode 310 311 \see rapidjson::SizeType 312 */ 313 #ifdef RAPIDJSON_DOXYGEN_RUNNING 314 #define RAPIDJSON_NO_SIZETYPEDEFINE 315 #endif 316 RAPIDJSON_NAMESPACE_BEGIN 317 //! Size type (for string lengths, array sizes, etc.) 318 /*! RapidJSON uses 32-bit array/string indices even on 64-bit platforms, 319 instead of using \c size_t. Users may override the SizeType by defining 320 \ref RAPIDJSON_NO_SIZETYPEDEFINE. 321 */ 322 typedef unsigned SizeType; 323 RAPIDJSON_NAMESPACE_END 324 #endif 325 326 // always import std::size_t to rapidjson namespace 327 RAPIDJSON_NAMESPACE_BEGIN 328 using std::size_t; 329 RAPIDJSON_NAMESPACE_END 330 331 /////////////////////////////////////////////////////////////////////////////// 332 // RAPIDJSON_ASSERT 333 334 //! Assertion. 335 /*! \ingroup RAPIDJSON_CONFIG 336 By default, rapidjson uses C \c assert() for internal assertions. 337 User can override it by defining RAPIDJSON_ASSERT(x) macro. 338 339 \note Parsing errors are handled and can be customized by the 340 \ref RAPIDJSON_ERRORS APIs. 341 */ 342 #ifndef RAPIDJSON_ASSERT 343 #include <cassert> 344 #define RAPIDJSON_ASSERT(x) assert(x) 345 #endif // RAPIDJSON_ASSERT 346 347 /////////////////////////////////////////////////////////////////////////////// 348 // RAPIDJSON_STATIC_ASSERT 349 350 // Adopt from boost 351 #ifndef RAPIDJSON_STATIC_ASSERT 352 //!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN 353 RAPIDJSON_NAMESPACE_BEGIN 354 template <bool x> struct STATIC_ASSERTION_FAILURE; 355 template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; }; 356 template<int x> struct StaticAssertTest {}; 357 RAPIDJSON_NAMESPACE_END 358 359 #define RAPIDJSON_JOIN(X, Y) RAPIDJSON_DO_JOIN(X, Y) 360 #define RAPIDJSON_DO_JOIN(X, Y) RAPIDJSON_DO_JOIN2(X, Y) 361 #define RAPIDJSON_DO_JOIN2(X, Y) X##Y 362 363 #if defined(__GNUC__) 364 #define RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE __attribute__((unused)) 365 #else 366 #define RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE 367 #endif 368 //!@endcond 369 370 /*! \def RAPIDJSON_STATIC_ASSERT 371 \brief (Internal) macro to check for conditions at compile-time 372 \param x compile-time condition 373 \hideinitializer 374 */ 375 #define RAPIDJSON_STATIC_ASSERT(x) \ 376 typedef ::RAPIDJSON_NAMESPACE::StaticAssertTest< \ 377 sizeof(::RAPIDJSON_NAMESPACE::STATIC_ASSERTION_FAILURE<bool(x) >)> \ 378 RAPIDJSON_JOIN(StaticAssertTypedef, __LINE__) RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE 379 #endif 380 381 /////////////////////////////////////////////////////////////////////////////// 382 // Helpers 383 384 //!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN 385 386 #define RAPIDJSON_MULTILINEMACRO_BEGIN do { 387 #define RAPIDJSON_MULTILINEMACRO_END \ 388 } while((void)0, 0) 389 390 // adopted from Boost 391 #define RAPIDJSON_VERSION_CODE(x,y,z) \ 392 (((x)*100000) + ((y)*100) + (z)) 393 394 /////////////////////////////////////////////////////////////////////////////// 395 // RAPIDJSON_DIAG_PUSH/POP, RAPIDJSON_DIAG_OFF 396 397 #if defined(__GNUC__) 398 #define RAPIDJSON_GNUC \ 399 RAPIDJSON_VERSION_CODE(__GNUC__,__GNUC_MINOR__,__GNUC_PATCHLEVEL__) 400 #endif 401 402 #if defined(__clang__) || (defined(RAPIDJSON_GNUC) && RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,2,0)) 403 404 #define RAPIDJSON_PRAGMA(x) _Pragma(RAPIDJSON_STRINGIFY(x)) 405 #define RAPIDJSON_DIAG_PRAGMA(x) RAPIDJSON_PRAGMA(GCC diagnostic x) 406 #define RAPIDJSON_DIAG_OFF(x) \ 407 RAPIDJSON_DIAG_PRAGMA(ignored RAPIDJSON_STRINGIFY(RAPIDJSON_JOIN(-W,x))) 408 409 // push/pop support in Clang and GCC>=4.6 410 #if defined(__clang__) || (defined(RAPIDJSON_GNUC) && RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0)) 411 #define RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_PRAGMA(push) 412 #define RAPIDJSON_DIAG_POP RAPIDJSON_DIAG_PRAGMA(pop) 413 #else // GCC >= 4.2, < 4.6 414 #define RAPIDJSON_DIAG_PUSH /* ignored */ 415 #define RAPIDJSON_DIAG_POP /* ignored */ 416 #endif 417 418 #elif defined(_MSC_VER) 419 420 // pragma (MSVC specific) 421 #define RAPIDJSON_PRAGMA(x) __pragma(x) 422 #define RAPIDJSON_DIAG_PRAGMA(x) RAPIDJSON_PRAGMA(warning(x)) 423 424 #define RAPIDJSON_DIAG_OFF(x) RAPIDJSON_DIAG_PRAGMA(disable: x) 425 #define RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_PRAGMA(push) 426 #define RAPIDJSON_DIAG_POP RAPIDJSON_DIAG_PRAGMA(pop) 427 428 #else 429 430 #define RAPIDJSON_DIAG_OFF(x) /* ignored */ 431 #define RAPIDJSON_DIAG_PUSH /* ignored */ 432 #define RAPIDJSON_DIAG_POP /* ignored */ 433 434 #endif // RAPIDJSON_DIAG_* 435 436 /////////////////////////////////////////////////////////////////////////////// 437 // C++11 features 438 439 #ifndef RAPIDJSON_HAS_CXX11_RVALUE_REFS 440 #if defined(__clang__) 441 #define RAPIDJSON_HAS_CXX11_RVALUE_REFS __has_feature(cxx_rvalue_references) && \ 442 (defined(_LIBCPP_VERSION) || defined(__GLIBCXX__) && __GLIBCXX__ >= 20080306) 443 #elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,3,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || \ 444 (defined(_MSC_VER) && _MSC_VER >= 1600) 445 446 #define RAPIDJSON_HAS_CXX11_RVALUE_REFS 1 447 #else 448 #define RAPIDJSON_HAS_CXX11_RVALUE_REFS 0 449 #endif 450 #endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS 451 452 #ifndef RAPIDJSON_HAS_CXX11_NOEXCEPT 453 #if defined(__clang__) 454 #define RAPIDJSON_HAS_CXX11_NOEXCEPT __has_feature(cxx_noexcept) 455 #elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__)) 456 // (defined(_MSC_VER) && _MSC_VER >= ????) // not yet supported 457 #define RAPIDJSON_HAS_CXX11_NOEXCEPT 1 458 #else 459 #define RAPIDJSON_HAS_CXX11_NOEXCEPT 0 460 #endif 461 #endif 462 #if RAPIDJSON_HAS_CXX11_NOEXCEPT 463 #define RAPIDJSON_NOEXCEPT noexcept 464 #else 465 #define RAPIDJSON_NOEXCEPT /* noexcept */ 466 #endif // RAPIDJSON_HAS_CXX11_NOEXCEPT 467 468 // no automatic detection, yet 469 #ifndef RAPIDJSON_HAS_CXX11_TYPETRAITS 470 #define RAPIDJSON_HAS_CXX11_TYPETRAITS 0 471 #endif 472 473 //!@endcond 474 475 /////////////////////////////////////////////////////////////////////////////// 476 // new/delete 477 478 #ifndef RAPIDJSON_NEW 479 ///! customization point for global \c new 480 #define RAPIDJSON_NEW(x) new x 481 #endif 482 #ifndef RAPIDJSON_DELETE 483 ///! customization point for global \c delete 484 #define RAPIDJSON_DELETE(x) delete x 485 #endif 486 487 /////////////////////////////////////////////////////////////////////////////// 488 // Allocators and Encodings 489 490 #include "allocators.h" 491 #include "encodings.h" 492 493 /*! \namespace rapidjson 494 \brief main RapidJSON namespace 495 \see RAPIDJSON_NAMESPACE 496 */ 497 RAPIDJSON_NAMESPACE_BEGIN 498 499 /////////////////////////////////////////////////////////////////////////////// 500 // Stream 501 502 /*! \class rapidjson::Stream 503 \brief Concept for reading and writing characters. 504 505 For read-only stream, no need to implement PutBegin(), Put(), Flush() and PutEnd(). 506 507 For write-only stream, only need to implement Put() and Flush(). 508 509 \code 510 concept Stream { 511 typename Ch; //!< Character type of the stream. 512 513 //! Read the current character from stream without moving the read cursor. 514 Ch Peek() const; 515 516 //! Read the current character from stream and moving the read cursor to next character. 517 Ch Take(); 518 519 //! Get the current read cursor. 520 //! \return Number of characters read from start. 521 size_t Tell(); 522 523 //! Begin writing operation at the current read pointer. 524 //! \return The begin writer pointer. 525 Ch* PutBegin(); 526 527 //! Write a character. 528 void Put(Ch c); 529 530 //! Flush the buffer. 531 void Flush(); 532 533 //! End the writing operation. 534 //! \param begin The begin write pointer returned by PutBegin(). 535 //! \return Number of characters written. 536 size_t PutEnd(Ch* begin); 537 } 538 \endcode 539 */ 540 541 //! Provides additional information for stream. 542 /*! 543 By using traits pattern, this type provides a default configuration for stream. 544 For custom stream, this type can be specialized for other configuration. 545 See TEST(Reader, CustomStringStream) in readertest.cpp for example. 546 */ 547 template<typename Stream> 548 struct StreamTraits { 549 //! Whether to make local copy of stream for optimization during parsing. 550 /*! 551 By default, for safety, streams do not use local copy optimization. 552 Stream that can be copied fast should specialize this, like StreamTraits<StringStream>. 553 */ 554 enum { copyOptimization = 0 }; 555 }; 556 557 //! Put N copies of a character to a stream. 558 template<typename Stream, typename Ch> 559 inline void PutN(Stream& stream, Ch c, size_t n) { 560 for (size_t i = 0; i < n; i++) 561 stream.Put(c); 562 } 563 564 /////////////////////////////////////////////////////////////////////////////// 565 // StringStream 566 567 //! Read-only string stream. 568 /*! \note implements Stream concept 569 */ 570 template <typename Encoding> 571 struct GenericStringStream { 572 typedef typename Encoding::Ch Ch; 573 574 GenericStringStream(const Ch *src) : src_(src), head_(src) {} 575 576 Ch Peek() const { return *src_; } 577 Ch Take() { return *src_++; } 578 size_t Tell() const { return static_cast<size_t>(src_ - head_); } 579 580 Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; } 581 void Put(Ch) { RAPIDJSON_ASSERT(false); } 582 void Flush() { RAPIDJSON_ASSERT(false); } 583 size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; } 584 585 const Ch* src_; //!< Current read position. 586 const Ch* head_; //!< Original head of the string. 587 }; 588 589 template <typename Encoding> 590 struct StreamTraits<GenericStringStream<Encoding> > { 591 enum { copyOptimization = 1 }; 592 }; 593 594 //! String stream with UTF8 encoding. 595 typedef GenericStringStream<UTF8<> > StringStream; 596 597 /////////////////////////////////////////////////////////////////////////////// 598 // InsituStringStream 599 600 //! A read-write string stream. 601 /*! This string stream is particularly designed for in-situ parsing. 602 \note implements Stream concept 603 */ 604 template <typename Encoding> 605 struct GenericInsituStringStream { 606 typedef typename Encoding::Ch Ch; 607 608 GenericInsituStringStream(Ch *src) : src_(src), dst_(0), head_(src) {} 609 610 // Read 611 Ch Peek() { return *src_; } 612 Ch Take() { return *src_++; } 613 size_t Tell() { return static_cast<size_t>(src_ - head_); } 614 615 // Write 616 void Put(Ch c) { RAPIDJSON_ASSERT(dst_ != 0); *dst_++ = c; } 617 618 Ch* PutBegin() { return dst_ = src_; } 619 size_t PutEnd(Ch* begin) { return static_cast<size_t>(dst_ - begin); } 620 void Flush() {} 621 622 Ch* Push(size_t count) { Ch* begin = dst_; dst_ += count; return begin; } 623 void Pop(size_t count) { dst_ -= count; } 624 625 Ch* src_; 626 Ch* dst_; 627 Ch* head_; 628 }; 629 630 template <typename Encoding> 631 struct StreamTraits<GenericInsituStringStream<Encoding> > { 632 enum { copyOptimization = 1 }; 633 }; 634 635 //! Insitu string stream with UTF8 encoding. 636 typedef GenericInsituStringStream<UTF8<> > InsituStringStream; 637 638 /////////////////////////////////////////////////////////////////////////////// 639 // Type 640 641 //! Type of JSON value 642 enum Type { 643 kNullType = 0, //!< null 644 kFalseType = 1, //!< false 645 kTrueType = 2, //!< true 646 kObjectType = 3, //!< object 647 kArrayType = 4, //!< array 648 kStringType = 5, //!< string 649 kNumberType = 6 //!< number 650 }; 651 652 RAPIDJSON_NAMESPACE_END 653 654 #endif // RAPIDJSON_RAPIDJSON_H_ 655
