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568 lines
19 KiB
C++
568 lines
19 KiB
C++
// Copyright (C) 2011 Milo Yip
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#ifndef RAPIDJSON_RAPIDJSON_H_
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#define RAPIDJSON_RAPIDJSON_H_
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// Copyright (c) 2011 Milo Yip (miloyip@gmail.com)
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// Version 0.1
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/*!\file rapidjson.h
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\brief common definitions and configuration
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\see RAPIDJSON_CONFIG
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*/
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/*! \defgroup RAPIDJSON_CONFIG RapidJSON configuration
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\brief Configuration macros for library features
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Some RapidJSON features are configurable to adapt the library to a wide
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variety of platforms, environments and usage scenarios. Most of the
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features can be configured in terms of overriden or predefined
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preprocessor macros at compile-time.
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Some additional customization is available in the \ref RAPIDJSON_ERRORS APIs.
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\note These macros should be given on the compiler command-line
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(where applicable) to avoid inconsistent values when compiling
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different translation units of a single application.
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*/
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#include <cstdlib> // malloc(), realloc(), free(), size_t
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#include <cstring> // memset(), memcpy(), memmove(), memcmp()
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_NO_INT64DEFINE
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/*! \def RAPIDJSON_NO_INT64DEFINE
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\ingroup RAPIDJSON_CONFIG
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\brief Use external 64-bit integer types.
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RapidJSON requires the 64-bit integer types \c int64_t and \c uint64_t types
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to be available at global scope.
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If users have their own definition, define RAPIDJSON_NO_INT64DEFINE to
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prevent RapidJSON from defining its own types.
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*/
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#ifndef RAPIDJSON_NO_INT64DEFINE
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//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
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#ifdef _MSC_VER
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#include "msinttypes/stdint.h"
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#include "msinttypes/inttypes.h"
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#else
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// Other compilers should have this.
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#include <stdint.h>
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#include <inttypes.h>
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#endif
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//!@endcond
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#ifdef RAPIDJSON_DOXYGEN_RUNNING
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#define RAPIDJSON_NO_INT64DEFINE
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#endif
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#endif // RAPIDJSON_NO_INT64TYPEDEF
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_FORCEINLINE
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#ifndef RAPIDJSON_FORCEINLINE
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//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
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#ifdef _MSC_VER
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#define RAPIDJSON_FORCEINLINE __forceinline
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#elif defined(__GNUC__) && __GNUC__ >= 4
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#define RAPIDJSON_FORCEINLINE __attribute__((always_inline))
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#else
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#define RAPIDJSON_FORCEINLINE
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#endif
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//!@endcond
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#endif // RAPIDJSON_FORCEINLINE
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_ENDIAN
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#define RAPIDJSON_LITTLEENDIAN 0 //!< Little endian machine
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#define RAPIDJSON_BIGENDIAN 1 //!< Big endian machine
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//! Endianness of the machine.
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/*!
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\def RAPIDJSON_ENDIAN
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\ingroup RAPIDJSON_CONFIG
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GCC 4.6 provided macro for detecting endianness of the target machine. But other
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compilers may not have this. User can define RAPIDJSON_ENDIAN to either
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\ref RAPIDJSON_LITTLEENDIAN or \ref RAPIDJSON_BIGENDIAN.
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Default detection implemented with reference to
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\li https://gcc.gnu.org/onlinedocs/gcc-4.6.0/cpp/Common-Predefined-Macros.html
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\li http://www.boost.org/doc/libs/1_42_0/boost/detail/endian.hpp
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*/
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#ifndef RAPIDJSON_ENDIAN
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// Detect with GCC 4.6's macro
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# ifdef __BYTE_ORDER__
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# if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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# define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
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# elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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# define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
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# else
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# error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN.
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# endif // __BYTE_ORDER__
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// Detect with GLIBC's endian.h
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# elif defined(__GLIBC__)
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# include <endian.h>
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# if (__BYTE_ORDER == __LITTLE_ENDIAN)
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# define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
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# elif (__BYTE_ORDER == __BIG_ENDIAN)
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# define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
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# else
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# error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN.
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# endif // __GLIBC__
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// Detect with _LITTLE_ENDIAN and _BIG_ENDIAN macro
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# elif defined(_LITTLE_ENDIAN) && !defined(_BIG_ENDIAN)
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# define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
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# elif defined(_BIG_ENDIAN) && !defined(_LITTLE_ENDIAN)
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# define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
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// Detect with architecture macros
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# elif defined(__sparc) || defined(__sparc__) || defined(_POWER) || defined(__powerpc__) || defined(__ppc__) || defined(__hpux) || defined(__hppa) || defined(_MIPSEB) || defined(_POWER) || defined(__s390__)
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# define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
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# 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__)
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# define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
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# elif defined(RAPIDJSON_DOXYGEN_RUNNING)
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# define RAPIDJSON_ENDIAN
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# else
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# error Unknown machine endianess detected. User needs to define RAPIDJSON_ENDIAN.
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# endif
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#endif // RAPIDJSON_ENDIAN
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_64BIT
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//! Whether using 64-bit architecture
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#ifndef RAPIDJSON_64BIT
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#if defined(__LP64__) || defined(_WIN64)
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#define RAPIDJSON_64BIT 1
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#else
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#define RAPIDJSON_64BIT 0
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#endif
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#endif // RAPIDJSON_64BIT
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_ALIGN
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//! Data alignment of the machine.
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/*! \ingroup RAPIDJSON_CONFIG
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\param x pointer to align
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Some machines require strict data alignment. Currently the default uses 4 bytes
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alignment. User can customize by defining the RAPIDJSON_ALIGN function macro.,
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*/
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#ifndef RAPIDJSON_ALIGN
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#define RAPIDJSON_ALIGN(x) ((x + 3u) & ~3u)
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_UINT64_C2
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//! Construct a 64-bit literal by a pair of 32-bit integer.
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/*!
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64-bit literal with or without ULL suffix is prone to compiler warnings.
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UINT64_C() is C macro which cause compilation problems.
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Use this macro to define 64-bit constants by a pair of 32-bit integer.
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*/
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#ifndef RAPIDJSON_UINT64_C2
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#define RAPIDJSON_UINT64_C2(high32, low32) ((static_cast<uint64_t>(high32) << 32) | static_cast<uint64_t>(low32))
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_SSE2/RAPIDJSON_SSE42/RAPIDJSON_SIMD
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/*! \def RAPIDJSON_SIMD
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\ingroup RAPIDJSON_CONFIG
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\brief Enable SSE2/SSE4.2 optimization.
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RapidJSON supports optimized implementations for some parsing operations
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based on the SSE2 or SSE4.2 SIMD extensions on modern Intel-compatible
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processors.
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To enable these optimizations, two different symbols can be defined;
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\code
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// Enable SSE2 optimization.
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#define RAPIDJSON_SSE2
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// Enable SSE4.2 optimization.
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#define RAPIDJSON_SSE42
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\endcode
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\c RAPIDJSON_SSE42 takes precedence, if both are defined.
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If any of these symbols is defined, RapidJSON defines the macro
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\c RAPIDJSON_SIMD to indicate the availability of the optimized code.
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*/
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#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42) \
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|| defined(RAPIDJSON_DOXYGEN_RUNNING)
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#define RAPIDJSON_SIMD
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_NO_SIZETYPEDEFINE
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#ifndef RAPIDJSON_NO_SIZETYPEDEFINE
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/*! \def RAPIDJSON_NO_SIZETYPEDEFINE
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\ingroup RAPIDJSON_CONFIG
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\brief User-provided \c SizeType definition.
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In order to avoid using 32-bit size types for indexing strings and arrays,
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define this preprocessor symbol and provide the type rapidjson::SizeType
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before including RapidJSON:
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\code
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#define RAPIDJSON_NO_SIZETYPEDEFINE
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namespace rapidjson { typedef ::std::size_t SizeType; }
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#include "rapidjson/..."
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\endcode
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\see rapidjson::SizeType
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*/
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#ifdef RAPIDJSON_DOXYGEN_RUNNING
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#define RAPIDJSON_NO_SIZETYPEDEFINE
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#endif
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namespace rapidjson {
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//! Size type (for string lengths, array sizes, etc.)
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/*! RapidJSON uses 32-bit array/string indices even on 64-bit platforms,
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instead of using \c size_t. Users may override the SizeType by defining
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\ref RAPIDJSON_NO_SIZETYPEDEFINE.
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*/
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typedef unsigned SizeType;
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} // namespace rapidjson
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#endif
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// always import std::size_t to rapidjson namespace
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namespace rapidjson {
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using std::size_t;
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} // namespace rapidjson
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_ASSERT
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//! Assertion.
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/*! \ingroup RAPIDJSON_CONFIG
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By default, rapidjson uses C \c assert() for internal assertions.
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User can override it by defining RAPIDJSON_ASSERT(x) macro.
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\note Parsing errors are handled and can be customized by the
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\ref RAPIDJSON_ERRORS APIs.
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*/
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#ifndef RAPIDJSON_ASSERT
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#include <cassert>
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#define RAPIDJSON_ASSERT(x) assert(x)
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#endif // RAPIDJSON_ASSERT
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_STATIC_ASSERT
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// Adopt from boost
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#ifndef RAPIDJSON_STATIC_ASSERT
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//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
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namespace rapidjson {
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template <bool x> struct STATIC_ASSERTION_FAILURE;
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template <> struct STATIC_ASSERTION_FAILURE<true> { enum { value = 1 }; };
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template<int x> struct StaticAssertTest {};
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} // namespace rapidjson
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#define RAPIDJSON_JOIN(X, Y) RAPIDJSON_DO_JOIN(X, Y)
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#define RAPIDJSON_DO_JOIN(X, Y) RAPIDJSON_DO_JOIN2(X, Y)
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#define RAPIDJSON_DO_JOIN2(X, Y) X##Y
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#if defined(__GNUC__)
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#define RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE __attribute__((unused))
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#else
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#define RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE
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#endif
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//!@endcond
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/*! \def RAPIDJSON_STATIC_ASSERT
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\brief (Internal) macro to check for conditions at compile-time
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\param x compile-time condition
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\hideinitializer
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*/
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#define RAPIDJSON_STATIC_ASSERT(x) typedef ::rapidjson::StaticAssertTest<\
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sizeof(::rapidjson::STATIC_ASSERTION_FAILURE<bool(x) >)>\
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RAPIDJSON_JOIN(StaticAssertTypedef, __LINE__) RAPIDJSON_STATIC_ASSERT_UNUSED_ATTRIBUTE
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#endif
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///////////////////////////////////////////////////////////////////////////////
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// Helpers
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//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
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#define RAPIDJSON_MULTILINEMACRO_BEGIN do {
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#define RAPIDJSON_MULTILINEMACRO_END \
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} while((void)0, 0)
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// adopted from Boost
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#define RAPIDJSON_VERSION_CODE(x,y,z) \
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(((x)*100000) + ((y)*100) + (z))
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// token stringification
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#define RAPIDJSON_STRINGIFY(x) RAPIDJSON_DO_STRINGIFY(x)
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#define RAPIDJSON_DO_STRINGIFY(x) #x
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///////////////////////////////////////////////////////////////////////////////
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// RAPIDJSON_DIAG_PUSH/POP, RAPIDJSON_DIAG_OFF
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#if defined(__GNUC__)
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#define RAPIDJSON_GNUC \
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RAPIDJSON_VERSION_CODE(__GNUC__,__GNUC_MINOR__,__GNUC_PATCHLEVEL__)
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#endif
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#if defined(__clang__) || (defined(RAPIDJSON_GNUC) && RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,2,0))
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#define RAPIDJSON_PRAGMA(x) _Pragma(RAPIDJSON_STRINGIFY(x))
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#define RAPIDJSON_DIAG_PRAGMA(x) RAPIDJSON_PRAGMA(GCC diagnostic x)
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#define RAPIDJSON_DIAG_OFF(x) \
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RAPIDJSON_DIAG_PRAGMA(ignored RAPIDJSON_STRINGIFY(RAPIDJSON_JOIN(-W,x)))
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// push/pop support in Clang and GCC>=4.6
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#if defined(__clang__) || (defined(RAPIDJSON_GNUC) && RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0))
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#define RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_PRAGMA(push)
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#define RAPIDJSON_DIAG_POP RAPIDJSON_DIAG_PRAGMA(pop)
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#else // GCC >= 4.2, < 4.6
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#define RAPIDJSON_DIAG_PUSH /* ignored */
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#define RAPIDJSON_DIAG_POP /* ignored */
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#endif
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#elif defined(_MSC_VER)
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// pragma (MSVC specific)
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#define RAPIDJSON_PRAGMA(x) __pragma(x)
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#define RAPIDJSON_DIAG_PRAGMA(x) RAPIDJSON_PRAGMA(warning(x))
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#define RAPIDJSON_DIAG_OFF(x) RAPIDJSON_DIAG_PRAGMA(disable: x)
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#define RAPIDJSON_DIAG_PUSH RAPIDJSON_DIAG_PRAGMA(push)
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#define RAPIDJSON_DIAG_POP RAPIDJSON_DIAG_PRAGMA(pop)
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#else
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#define RAPIDJSON_DIAG_OFF(x) /* ignored */
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#define RAPIDJSON_DIAG_PUSH /* ignored */
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#define RAPIDJSON_DIAG_POP /* ignored */
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#endif // RAPIDJSON_DIAG_*
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///////////////////////////////////////////////////////////////////////////////
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// C++11 features
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#ifndef RAPIDJSON_HAS_CXX11_RVALUE_REFS
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#if defined(__clang__)
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#define RAPIDJSON_HAS_CXX11_RVALUE_REFS __has_feature(cxx_rvalue_references)
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#elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,3,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__)) || \
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(defined(_MSC_VER) && _MSC_VER >= 1600)
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#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 1
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#else
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#define RAPIDJSON_HAS_CXX11_RVALUE_REFS 0
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#endif
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#endif // RAPIDJSON_HAS_CXX11_RVALUE_REFS
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#ifndef RAPIDJSON_HAS_CXX11_NOEXCEPT
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#if defined(__clang__)
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#define RAPIDJSON_HAS_CXX11_NOEXCEPT __has_feature(cxx_noexcept)
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#elif (defined(RAPIDJSON_GNUC) && (RAPIDJSON_GNUC >= RAPIDJSON_VERSION_CODE(4,6,0)) && defined(__GXX_EXPERIMENTAL_CXX0X__))
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// (defined(_MSC_VER) && _MSC_VER >= ????) // not yet supported
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#define RAPIDJSON_HAS_CXX11_NOEXCEPT 1
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#else
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#define RAPIDJSON_HAS_CXX11_NOEXCEPT 0
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#endif
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#endif
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#if RAPIDJSON_HAS_CXX11_NOEXCEPT
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#define RAPIDJSON_NOEXCEPT noexcept
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#else
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#define RAPIDJSON_NOEXCEPT /* noexcept */
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#endif // RAPIDJSON_HAS_CXX11_NOEXCEPT
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// no automatic detection, yet
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#ifndef RAPIDJSON_HAS_CXX11_TYPETRAITS
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#define RAPIDJSON_HAS_CXX11_TYPETRAITS 0
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#endif
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//!@endcond
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///////////////////////////////////////////////////////////////////////////////
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// Allocators and Encodings
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#include "allocators.h"
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#include "encodings.h"
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//! main RapidJSON namespace
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namespace rapidjson {
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///////////////////////////////////////////////////////////////////////////////
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// Stream
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/*! \class rapidjson::Stream
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\brief Concept for reading and writing characters.
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For read-only stream, no need to implement PutBegin(), Put(), Flush() and PutEnd().
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For write-only stream, only need to implement Put() and Flush().
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\code
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concept Stream {
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typename Ch; //!< Character type of the stream.
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//! Read the current character from stream without moving the read cursor.
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Ch Peek() const;
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//! Read the current character from stream and moving the read cursor to next character.
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Ch Take();
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//! Get the current read cursor.
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//! \return Number of characters read from start.
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size_t Tell();
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//! Begin writing operation at the current read pointer.
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//! \return The begin writer pointer.
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Ch* PutBegin();
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//! Write a character.
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void Put(Ch c);
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//! Flush the buffer.
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void Flush();
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//! End the writing operation.
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//! \param begin The begin write pointer returned by PutBegin().
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//! \return Number of characters written.
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size_t PutEnd(Ch* begin);
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}
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\endcode
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*/
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//! Provides additional information for stream.
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/*!
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By using traits pattern, this type provides a default configuration for stream.
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For custom stream, this type can be specialized for other configuration.
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See TEST(Reader, CustomStringStream) in readertest.cpp for example.
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*/
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template<typename Stream>
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struct StreamTraits {
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//! Whether to make local copy of stream for optimization during parsing.
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/*!
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By default, for safety, streams do not use local copy optimization.
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Stream that can be copied fast should specialize this, like StreamTraits<StringStream>.
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*/
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enum { copyOptimization = 0 };
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};
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|
//! Put N copies of a character to a stream.
|
|
template<typename Stream, typename Ch>
|
|
inline void PutN(Stream& stream, Ch c, size_t n) {
|
|
for (size_t i = 0; i < n; i++)
|
|
stream.Put(c);
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// StringStream
|
|
|
|
//! Read-only string stream.
|
|
/*! \note implements Stream concept
|
|
*/
|
|
template <typename Encoding>
|
|
struct GenericStringStream {
|
|
typedef typename Encoding::Ch Ch;
|
|
|
|
GenericStringStream(const Ch *src) : src_(src), head_(src) {}
|
|
|
|
Ch Peek() const { return *src_; }
|
|
Ch Take() { return *src_++; }
|
|
size_t Tell() const { return static_cast<size_t>(src_ - head_); }
|
|
|
|
Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
|
|
void Put(Ch) { RAPIDJSON_ASSERT(false); }
|
|
void Flush() { RAPIDJSON_ASSERT(false); }
|
|
size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
|
|
|
|
const Ch* src_; //!< Current read position.
|
|
const Ch* head_; //!< Original head of the string.
|
|
};
|
|
|
|
template <typename Encoding>
|
|
struct StreamTraits<GenericStringStream<Encoding> > {
|
|
enum { copyOptimization = 1 };
|
|
};
|
|
|
|
//! String stream with UTF8 encoding.
|
|
typedef GenericStringStream<UTF8<> > StringStream;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// InsituStringStream
|
|
|
|
//! A read-write string stream.
|
|
/*! This string stream is particularly designed for in-situ parsing.
|
|
\note implements Stream concept
|
|
*/
|
|
template <typename Encoding>
|
|
struct GenericInsituStringStream {
|
|
typedef typename Encoding::Ch Ch;
|
|
|
|
GenericInsituStringStream(Ch *src) : src_(src), dst_(0), head_(src) {}
|
|
|
|
// Read
|
|
Ch Peek() { return *src_; }
|
|
Ch Take() { return *src_++; }
|
|
size_t Tell() { return static_cast<size_t>(src_ - head_); }
|
|
|
|
// Write
|
|
void Put(Ch c) { RAPIDJSON_ASSERT(dst_ != 0); *dst_++ = c; }
|
|
|
|
Ch* PutBegin() { return dst_ = src_; }
|
|
size_t PutEnd(Ch* begin) { return static_cast<size_t>(dst_ - begin); }
|
|
void Flush() {}
|
|
|
|
Ch* Push(size_t count) { Ch* begin = dst_; dst_ += count; return begin; }
|
|
void Pop(size_t count) { dst_ -= count; }
|
|
|
|
Ch* src_;
|
|
Ch* dst_;
|
|
Ch* head_;
|
|
};
|
|
|
|
template <typename Encoding>
|
|
struct StreamTraits<GenericInsituStringStream<Encoding> > {
|
|
enum { copyOptimization = 1 };
|
|
};
|
|
|
|
//! Insitu string stream with UTF8 encoding.
|
|
typedef GenericInsituStringStream<UTF8<> > InsituStringStream;
|
|
|
|
///////////////////////////////////////////////////////////////////////////////
|
|
// Type
|
|
|
|
//! Type of JSON value
|
|
enum Type {
|
|
kNullType = 0, //!< null
|
|
kFalseType = 1, //!< false
|
|
kTrueType = 2, //!< true
|
|
kObjectType = 3, //!< object
|
|
kArrayType = 4, //!< array
|
|
kStringType = 5, //!< string
|
|
kNumberType = 6 //!< number
|
|
};
|
|
|
|
} // namespace rapidjson
|
|
|
|
#endif // RAPIDJSON_RAPIDJSON_H_
|