mirror of
https://github.com/cwinfo/matterbridge.git
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2245 lines
92 KiB
C
2245 lines
92 KiB
C
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// Tencent is pleased to support the open source community by making RapidJSON available.
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//
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// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
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//
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// Licensed under the MIT License (the "License"); you may not use this file except
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// in compliance with the License. You may obtain a copy of the License at
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//
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// http://opensource.org/licenses/MIT
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//
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// Unless required by applicable law or agreed to in writing, software distributed
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// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
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// CONDITIONS OF ANY KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations under the License.
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#ifndef RAPIDJSON_READER_H_
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#define RAPIDJSON_READER_H_
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/*! \file reader.h */
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#include "lottie_rapidjson_allocators.h"
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#include "lottie_rapidjson_stream.h"
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#include "lottie_rapidjson_encodedstream.h"
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#include "lottie_rapidjson_internal_clzll.h"
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#include "lottie_rapidjson_internal_meta.h"
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#include "lottie_rapidjson_internal_stack.h"
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#include "lottie_rapidjson_internal_strtod.h"
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#include <limits>
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#if defined(RAPIDJSON_SIMD) && defined(_MSC_VER)
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#include <intrin.h>
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#pragma intrinsic(_BitScanForward)
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#endif
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#ifdef RAPIDJSON_SSE42
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#include <nmmintrin.h>
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#elif defined(RAPIDJSON_SSE2)
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#include <emmintrin.h>
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#elif defined(RAPIDJSON_NEON)
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#include <arm_neon.h>
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#endif
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#ifdef __clang__
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RAPIDJSON_DIAG_PUSH
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RAPIDJSON_DIAG_OFF(old-style-cast)
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RAPIDJSON_DIAG_OFF(padded)
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RAPIDJSON_DIAG_OFF(switch-enum)
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#elif defined(_MSC_VER)
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RAPIDJSON_DIAG_PUSH
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RAPIDJSON_DIAG_OFF(4127) // conditional expression is constant
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RAPIDJSON_DIAG_OFF(4702) // unreachable code
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#endif
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#ifdef __GNUC__
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RAPIDJSON_DIAG_PUSH
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RAPIDJSON_DIAG_OFF(effc++)
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#endif
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//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
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#define RAPIDJSON_NOTHING /* deliberately empty */
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#ifndef RAPIDJSON_PARSE_ERROR_EARLY_RETURN
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#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN(value) \
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RAPIDJSON_MULTILINEMACRO_BEGIN \
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if (RAPIDJSON_UNLIKELY(HasParseError())) { return value; } \
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RAPIDJSON_MULTILINEMACRO_END
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#endif
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#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID \
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RAPIDJSON_PARSE_ERROR_EARLY_RETURN(RAPIDJSON_NOTHING)
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//!@endcond
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/*! \def RAPIDJSON_PARSE_ERROR_NORETURN
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\ingroup RAPIDJSON_ERRORS
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\brief Macro to indicate a parse error.
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\param parseErrorCode \ref rapidjson::ParseErrorCode of the error
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\param offset position of the error in JSON input (\c size_t)
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This macros can be used as a customization point for the internal
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error handling mechanism of RapidJSON.
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A common usage model is to throw an exception instead of requiring the
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caller to explicitly check the \ref rapidjson::GenericReader::Parse's
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return value:
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\code
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#define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode,offset) \
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throw ParseException(parseErrorCode, #parseErrorCode, offset)
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#include <stdexcept> // std::runtime_error
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#include "rapidjson/error/error.h" // rapidjson::ParseResult
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struct ParseException : std::runtime_error, rapidjson::ParseResult {
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ParseException(rapidjson::ParseErrorCode code, const char* msg, size_t offset)
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: std::runtime_error(msg), ParseResult(code, offset) {}
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};
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#include "rapidjson/reader.h"
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\endcode
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\see RAPIDJSON_PARSE_ERROR, rapidjson::GenericReader::Parse
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*/
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#ifndef RAPIDJSON_PARSE_ERROR_NORETURN
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#define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset) \
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RAPIDJSON_MULTILINEMACRO_BEGIN \
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RAPIDJSON_ASSERT(!HasParseError()); /* Error can only be assigned once */ \
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SetParseError(parseErrorCode, offset); \
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RAPIDJSON_MULTILINEMACRO_END
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#endif
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/*! \def RAPIDJSON_PARSE_ERROR
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\ingroup RAPIDJSON_ERRORS
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\brief (Internal) macro to indicate and handle a parse error.
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\param parseErrorCode \ref rapidjson::ParseErrorCode of the error
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\param offset position of the error in JSON input (\c size_t)
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Invokes RAPIDJSON_PARSE_ERROR_NORETURN and stops the parsing.
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\see RAPIDJSON_PARSE_ERROR_NORETURN
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\hideinitializer
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*/
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#ifndef RAPIDJSON_PARSE_ERROR
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#define RAPIDJSON_PARSE_ERROR(parseErrorCode, offset) \
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RAPIDJSON_MULTILINEMACRO_BEGIN \
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RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset); \
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RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID; \
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RAPIDJSON_MULTILINEMACRO_END
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#endif
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#include "lottie_rapidjson_error_error.h"
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RAPIDJSON_NAMESPACE_BEGIN
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///////////////////////////////////////////////////////////////////////////////
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// ParseFlag
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/*! \def RAPIDJSON_PARSE_DEFAULT_FLAGS
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\ingroup RAPIDJSON_CONFIG
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\brief User-defined kParseDefaultFlags definition.
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User can define this as any \c ParseFlag combinations.
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*/
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#ifndef RAPIDJSON_PARSE_DEFAULT_FLAGS
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#define RAPIDJSON_PARSE_DEFAULT_FLAGS kParseNoFlags
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#endif
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//! Combination of parseFlags
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/*! \see Reader::Parse, Document::Parse, Document::ParseInsitu, Document::ParseStream
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*/
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enum ParseFlag {
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kParseNoFlags = 0, //!< No flags are set.
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kParseInsituFlag = 1, //!< In-situ(destructive) parsing.
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kParseValidateEncodingFlag = 2, //!< Validate encoding of JSON strings.
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kParseIterativeFlag = 4, //!< Iterative(constant complexity in terms of function call stack size) parsing.
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kParseStopWhenDoneFlag = 8, //!< After parsing a complete JSON root from stream, stop further processing the rest of stream. When this flag is used, parser will not generate kParseErrorDocumentRootNotSingular error.
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kParseFullPrecisionFlag = 16, //!< Parse number in full precision (but slower).
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kParseCommentsFlag = 32, //!< Allow one-line (//) and multi-line (/**/) comments.
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kParseNumbersAsStringsFlag = 64, //!< Parse all numbers (ints/doubles) as strings.
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kParseTrailingCommasFlag = 128, //!< Allow trailing commas at the end of objects and arrays.
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kParseNanAndInfFlag = 256, //!< Allow parsing NaN, Inf, Infinity, -Inf and -Infinity as doubles.
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kParseEscapedApostropheFlag = 512, //!< Allow escaped apostrophe in strings.
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kParseDefaultFlags = RAPIDJSON_PARSE_DEFAULT_FLAGS //!< Default parse flags. Can be customized by defining RAPIDJSON_PARSE_DEFAULT_FLAGS
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};
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///////////////////////////////////////////////////////////////////////////////
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// Handler
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/*! \class rapidjson::Handler
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\brief Concept for receiving events from GenericReader upon parsing.
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The functions return true if no error occurs. If they return false,
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the event publisher should terminate the process.
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\code
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concept Handler {
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typename Ch;
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bool Null();
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bool Bool(bool b);
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bool Int(int i);
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bool Uint(unsigned i);
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bool Int64(int64_t i);
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bool Uint64(uint64_t i);
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bool Double(double d);
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/// enabled via kParseNumbersAsStringsFlag, string is not null-terminated (use length)
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bool RawNumber(const Ch* str, SizeType length, bool copy);
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bool String(const Ch* str, SizeType length, bool copy);
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bool StartObject();
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bool Key(const Ch* str, SizeType length, bool copy);
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bool EndObject(SizeType memberCount);
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bool StartArray();
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bool EndArray(SizeType elementCount);
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};
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\endcode
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*/
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///////////////////////////////////////////////////////////////////////////////
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// BaseReaderHandler
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//! Default implementation of Handler.
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/*! This can be used as base class of any reader handler.
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\note implements Handler concept
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*/
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template<typename Encoding = UTF8<>, typename Derived = void>
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struct BaseReaderHandler {
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typedef typename Encoding::Ch Ch;
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typedef typename internal::SelectIf<internal::IsSame<Derived, void>, BaseReaderHandler, Derived>::Type Override;
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bool Default() { return true; }
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bool Null() { return static_cast<Override&>(*this).Default(); }
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bool Bool(bool) { return static_cast<Override&>(*this).Default(); }
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bool Int(int) { return static_cast<Override&>(*this).Default(); }
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bool Uint(unsigned) { return static_cast<Override&>(*this).Default(); }
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bool Int64(int64_t) { return static_cast<Override&>(*this).Default(); }
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bool Uint64(uint64_t) { return static_cast<Override&>(*this).Default(); }
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bool Double(double) { return static_cast<Override&>(*this).Default(); }
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/// enabled via kParseNumbersAsStringsFlag, string is not null-terminated (use length)
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bool RawNumber(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
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bool String(const Ch*, SizeType, bool) { return static_cast<Override&>(*this).Default(); }
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bool StartObject() { return static_cast<Override&>(*this).Default(); }
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bool Key(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
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bool EndObject(SizeType) { return static_cast<Override&>(*this).Default(); }
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bool StartArray() { return static_cast<Override&>(*this).Default(); }
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bool EndArray(SizeType) { return static_cast<Override&>(*this).Default(); }
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};
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///////////////////////////////////////////////////////////////////////////////
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// StreamLocalCopy
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namespace internal {
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template<typename Stream, int = StreamTraits<Stream>::copyOptimization>
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class StreamLocalCopy;
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//! Do copy optimization.
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template<typename Stream>
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class StreamLocalCopy<Stream, 1> {
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public:
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StreamLocalCopy(Stream& original) : s(original), original_(original) {}
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~StreamLocalCopy() { original_ = s; }
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Stream s;
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private:
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StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
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Stream& original_;
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};
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//! Keep reference.
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template<typename Stream>
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class StreamLocalCopy<Stream, 0> {
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public:
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StreamLocalCopy(Stream& original) : s(original) {}
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Stream& s;
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private:
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StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
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};
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} // namespace internal
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///////////////////////////////////////////////////////////////////////////////
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// SkipWhitespace
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//! Skip the JSON white spaces in a stream.
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/*! \param is A input stream for skipping white spaces.
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\note This function has SSE2/SSE4.2 specialization.
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*/
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template<typename InputStream>
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void SkipWhitespace(InputStream& is) {
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internal::StreamLocalCopy<InputStream> copy(is);
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InputStream& s(copy.s);
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typename InputStream::Ch c;
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while ((c = s.Peek()) == ' ' || c == '\n' || c == '\r' || c == '\t')
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s.Take();
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}
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inline const char* SkipWhitespace(const char* p, const char* end) {
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while (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
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++p;
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return p;
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}
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#ifdef RAPIDJSON_SSE42
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//! Skip whitespace with SSE 4.2 pcmpistrm instruction, testing 16 8-byte characters at once.
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inline const char *SkipWhitespace_SIMD(const char* p) {
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// Fast return for single non-whitespace
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if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
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++p;
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else
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return p;
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// 16-byte align to the next boundary
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const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
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while (p != nextAligned)
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if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
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++p;
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else
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return p;
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// The rest of string using SIMD
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static const char whitespace[16] = " \n\r\t";
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const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
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for (;; p += 16) {
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const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
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const int r = _mm_cmpistri(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_LEAST_SIGNIFICANT | _SIDD_NEGATIVE_POLARITY);
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if (r != 16) // some of characters is non-whitespace
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return p + r;
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}
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}
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inline const char *SkipWhitespace_SIMD(const char* p, const char* end) {
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// Fast return for single non-whitespace
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if (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
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++p;
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else
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return p;
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// The middle of string using SIMD
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static const char whitespace[16] = " \n\r\t";
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const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
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for (; p <= end - 16; p += 16) {
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const __m128i s = _mm_loadu_si128(reinterpret_cast<const __m128i *>(p));
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const int r = _mm_cmpistri(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_LEAST_SIGNIFICANT | _SIDD_NEGATIVE_POLARITY);
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if (r != 16) // some of characters is non-whitespace
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return p + r;
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}
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return SkipWhitespace(p, end);
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}
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#elif defined(RAPIDJSON_SSE2)
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//! Skip whitespace with SSE2 instructions, testing 16 8-byte characters at once.
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inline const char *SkipWhitespace_SIMD(const char* p) {
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// Fast return for single non-whitespace
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if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
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++p;
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else
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|
|
return p;
|
||
|
|
|
||
|
|
// 16-byte align to the next boundary
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
while (p != nextAligned)
|
||
|
|
if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
|
||
|
|
++p;
|
||
|
|
else
|
||
|
|
return p;
|
||
|
|
|
||
|
|
// The rest of string
|
||
|
|
#define C16(c) { c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c }
|
||
|
|
static const char whitespaces[4][16] = { C16(' '), C16('\n'), C16('\r'), C16('\t') };
|
||
|
|
#undef C16
|
||
|
|
|
||
|
|
const __m128i w0 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[0][0]));
|
||
|
|
const __m128i w1 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[1][0]));
|
||
|
|
const __m128i w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
|
||
|
|
const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));
|
||
|
|
|
||
|
|
for (;; p += 16) {
|
||
|
|
const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
|
||
|
|
__m128i x = _mm_cmpeq_epi8(s, w0);
|
||
|
|
x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w1));
|
||
|
|
x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w2));
|
||
|
|
x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w3));
|
||
|
|
unsigned short r = static_cast<unsigned short>(~_mm_movemask_epi8(x));
|
||
|
|
if (r != 0) { // some of characters may be non-whitespace
|
||
|
|
#ifdef _MSC_VER // Find the index of first non-whitespace
|
||
|
|
unsigned long offset;
|
||
|
|
_BitScanForward(&offset, r);
|
||
|
|
return p + offset;
|
||
|
|
#else
|
||
|
|
return p + __builtin_ffs(r) - 1;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
inline const char *SkipWhitespace_SIMD(const char* p, const char* end) {
|
||
|
|
// Fast return for single non-whitespace
|
||
|
|
if (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
|
||
|
|
++p;
|
||
|
|
else
|
||
|
|
return p;
|
||
|
|
|
||
|
|
// The rest of string
|
||
|
|
#define C16(c) { c, c, c, c, c, c, c, c, c, c, c, c, c, c, c, c }
|
||
|
|
static const char whitespaces[4][16] = { C16(' '), C16('\n'), C16('\r'), C16('\t') };
|
||
|
|
#undef C16
|
||
|
|
|
||
|
|
const __m128i w0 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[0][0]));
|
||
|
|
const __m128i w1 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[1][0]));
|
||
|
|
const __m128i w2 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[2][0]));
|
||
|
|
const __m128i w3 = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespaces[3][0]));
|
||
|
|
|
||
|
|
for (; p <= end - 16; p += 16) {
|
||
|
|
const __m128i s = _mm_loadu_si128(reinterpret_cast<const __m128i *>(p));
|
||
|
|
__m128i x = _mm_cmpeq_epi8(s, w0);
|
||
|
|
x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w1));
|
||
|
|
x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w2));
|
||
|
|
x = _mm_or_si128(x, _mm_cmpeq_epi8(s, w3));
|
||
|
|
unsigned short r = static_cast<unsigned short>(~_mm_movemask_epi8(x));
|
||
|
|
if (r != 0) { // some of characters may be non-whitespace
|
||
|
|
#ifdef _MSC_VER // Find the index of first non-whitespace
|
||
|
|
unsigned long offset;
|
||
|
|
_BitScanForward(&offset, r);
|
||
|
|
return p + offset;
|
||
|
|
#else
|
||
|
|
return p + __builtin_ffs(r) - 1;
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return SkipWhitespace(p, end);
|
||
|
|
}
|
||
|
|
|
||
|
|
#elif defined(RAPIDJSON_NEON)
|
||
|
|
|
||
|
|
//! Skip whitespace with ARM Neon instructions, testing 16 8-byte characters at once.
|
||
|
|
inline const char *SkipWhitespace_SIMD(const char* p) {
|
||
|
|
// Fast return for single non-whitespace
|
||
|
|
if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
|
||
|
|
++p;
|
||
|
|
else
|
||
|
|
return p;
|
||
|
|
|
||
|
|
// 16-byte align to the next boundary
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
while (p != nextAligned)
|
||
|
|
if (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t')
|
||
|
|
++p;
|
||
|
|
else
|
||
|
|
return p;
|
||
|
|
|
||
|
|
const uint8x16_t w0 = vmovq_n_u8(' ');
|
||
|
|
const uint8x16_t w1 = vmovq_n_u8('\n');
|
||
|
|
const uint8x16_t w2 = vmovq_n_u8('\r');
|
||
|
|
const uint8x16_t w3 = vmovq_n_u8('\t');
|
||
|
|
|
||
|
|
for (;; p += 16) {
|
||
|
|
const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
|
||
|
|
uint8x16_t x = vceqq_u8(s, w0);
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, w1));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, w2));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, w3));
|
||
|
|
|
||
|
|
x = vmvnq_u8(x); // Negate
|
||
|
|
x = vrev64q_u8(x); // Rev in 64
|
||
|
|
uint64_t low = vgetq_lane_u64(vreinterpretq_u64_u8(x), 0); // extract
|
||
|
|
uint64_t high = vgetq_lane_u64(vreinterpretq_u64_u8(x), 1); // extract
|
||
|
|
|
||
|
|
if (low == 0) {
|
||
|
|
if (high != 0) {
|
||
|
|
uint32_t lz = internal::clzll(high);
|
||
|
|
return p + 8 + (lz >> 3);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
uint32_t lz = internal::clzll(low);
|
||
|
|
return p + (lz >> 3);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
inline const char *SkipWhitespace_SIMD(const char* p, const char* end) {
|
||
|
|
// Fast return for single non-whitespace
|
||
|
|
if (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
|
||
|
|
++p;
|
||
|
|
else
|
||
|
|
return p;
|
||
|
|
|
||
|
|
const uint8x16_t w0 = vmovq_n_u8(' ');
|
||
|
|
const uint8x16_t w1 = vmovq_n_u8('\n');
|
||
|
|
const uint8x16_t w2 = vmovq_n_u8('\r');
|
||
|
|
const uint8x16_t w3 = vmovq_n_u8('\t');
|
||
|
|
|
||
|
|
for (; p <= end - 16; p += 16) {
|
||
|
|
const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
|
||
|
|
uint8x16_t x = vceqq_u8(s, w0);
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, w1));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, w2));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, w3));
|
||
|
|
|
||
|
|
x = vmvnq_u8(x); // Negate
|
||
|
|
x = vrev64q_u8(x); // Rev in 64
|
||
|
|
uint64_t low = vgetq_lane_u64(vreinterpretq_u64_u8(x), 0); // extract
|
||
|
|
uint64_t high = vgetq_lane_u64(vreinterpretq_u64_u8(x), 1); // extract
|
||
|
|
|
||
|
|
if (low == 0) {
|
||
|
|
if (high != 0) {
|
||
|
|
uint32_t lz = internal::clzll(high);
|
||
|
|
return p + 8 + (lz >> 3);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
uint32_t lz = internal::clzll(low);
|
||
|
|
return p + (lz >> 3);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return SkipWhitespace(p, end);
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // RAPIDJSON_NEON
|
||
|
|
|
||
|
|
#ifdef RAPIDJSON_SIMD
|
||
|
|
//! Template function specialization for InsituStringStream
|
||
|
|
template<> inline void SkipWhitespace(InsituStringStream& is) {
|
||
|
|
is.src_ = const_cast<char*>(SkipWhitespace_SIMD(is.src_));
|
||
|
|
}
|
||
|
|
|
||
|
|
//! Template function specialization for StringStream
|
||
|
|
template<> inline void SkipWhitespace(StringStream& is) {
|
||
|
|
is.src_ = SkipWhitespace_SIMD(is.src_);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<> inline void SkipWhitespace(EncodedInputStream<UTF8<>, MemoryStream>& is) {
|
||
|
|
is.is_.src_ = SkipWhitespace_SIMD(is.is_.src_, is.is_.end_);
|
||
|
|
}
|
||
|
|
#endif // RAPIDJSON_SIMD
|
||
|
|
|
||
|
|
///////////////////////////////////////////////////////////////////////////////
|
||
|
|
// GenericReader
|
||
|
|
|
||
|
|
//! SAX-style JSON parser. Use \ref Reader for UTF8 encoding and default allocator.
|
||
|
|
/*! GenericReader parses JSON text from a stream, and send events synchronously to an
|
||
|
|
object implementing Handler concept.
|
||
|
|
|
||
|
|
It needs to allocate a stack for storing a single decoded string during
|
||
|
|
non-destructive parsing.
|
||
|
|
|
||
|
|
For in-situ parsing, the decoded string is directly written to the source
|
||
|
|
text string, no temporary buffer is required.
|
||
|
|
|
||
|
|
A GenericReader object can be reused for parsing multiple JSON text.
|
||
|
|
|
||
|
|
\tparam SourceEncoding Encoding of the input stream.
|
||
|
|
\tparam TargetEncoding Encoding of the parse output.
|
||
|
|
\tparam StackAllocator Allocator type for stack.
|
||
|
|
*/
|
||
|
|
template <typename SourceEncoding, typename TargetEncoding, typename StackAllocator = CrtAllocator>
|
||
|
|
class GenericReader {
|
||
|
|
public:
|
||
|
|
typedef typename SourceEncoding::Ch Ch; //!< SourceEncoding character type
|
||
|
|
|
||
|
|
//! Constructor.
|
||
|
|
/*! \param stackAllocator Optional allocator for allocating stack memory. (Only use for non-destructive parsing)
|
||
|
|
\param stackCapacity stack capacity in bytes for storing a single decoded string. (Only use for non-destructive parsing)
|
||
|
|
*/
|
||
|
|
GenericReader(StackAllocator* stackAllocator = 0, size_t stackCapacity = kDefaultStackCapacity) :
|
||
|
|
stack_(stackAllocator, stackCapacity), parseResult_(), state_(IterativeParsingStartState) {}
|
||
|
|
|
||
|
|
//! Parse JSON text.
|
||
|
|
/*! \tparam parseFlags Combination of \ref ParseFlag.
|
||
|
|
\tparam InputStream Type of input stream, implementing Stream concept.
|
||
|
|
\tparam Handler Type of handler, implementing Handler concept.
|
||
|
|
\param is Input stream to be parsed.
|
||
|
|
\param handler The handler to receive events.
|
||
|
|
\return Whether the parsing is successful.
|
||
|
|
*/
|
||
|
|
template <unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
ParseResult Parse(InputStream& is, Handler& handler) {
|
||
|
|
if (parseFlags & kParseIterativeFlag)
|
||
|
|
return IterativeParse<parseFlags>(is, handler);
|
||
|
|
|
||
|
|
parseResult_.Clear();
|
||
|
|
|
||
|
|
ClearStackOnExit scope(*this);
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(is.Peek() == '\0')) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorDocumentEmpty, is.Tell());
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
ParseValue<parseFlags>(is, handler);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
|
||
|
|
if (!(parseFlags & kParseStopWhenDoneFlag)) {
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(is.Peek() != '\0')) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorDocumentRootNotSingular, is.Tell());
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return parseResult_;
|
||
|
|
}
|
||
|
|
|
||
|
|
//! Parse JSON text (with \ref kParseDefaultFlags)
|
||
|
|
/*! \tparam InputStream Type of input stream, implementing Stream concept
|
||
|
|
\tparam Handler Type of handler, implementing Handler concept.
|
||
|
|
\param is Input stream to be parsed.
|
||
|
|
\param handler The handler to receive events.
|
||
|
|
\return Whether the parsing is successful.
|
||
|
|
*/
|
||
|
|
template <typename InputStream, typename Handler>
|
||
|
|
ParseResult Parse(InputStream& is, Handler& handler) {
|
||
|
|
return Parse<kParseDefaultFlags>(is, handler);
|
||
|
|
}
|
||
|
|
|
||
|
|
//! Initialize JSON text token-by-token parsing
|
||
|
|
/*!
|
||
|
|
*/
|
||
|
|
void IterativeParseInit() {
|
||
|
|
parseResult_.Clear();
|
||
|
|
state_ = IterativeParsingStartState;
|
||
|
|
}
|
||
|
|
|
||
|
|
//! Parse one token from JSON text
|
||
|
|
/*! \tparam InputStream Type of input stream, implementing Stream concept
|
||
|
|
\tparam Handler Type of handler, implementing Handler concept.
|
||
|
|
\param is Input stream to be parsed.
|
||
|
|
\param handler The handler to receive events.
|
||
|
|
\return Whether the parsing is successful.
|
||
|
|
*/
|
||
|
|
template <unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
bool IterativeParseNext(InputStream& is, Handler& handler) {
|
||
|
|
while (RAPIDJSON_LIKELY(is.Peek() != '\0')) {
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
|
||
|
|
Token t = Tokenize(is.Peek());
|
||
|
|
IterativeParsingState n = Predict(state_, t);
|
||
|
|
IterativeParsingState d = Transit<parseFlags>(state_, t, n, is, handler);
|
||
|
|
|
||
|
|
// If we've finished or hit an error...
|
||
|
|
if (RAPIDJSON_UNLIKELY(IsIterativeParsingCompleteState(d))) {
|
||
|
|
// Report errors.
|
||
|
|
if (d == IterativeParsingErrorState) {
|
||
|
|
HandleError(state_, is);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Transition to the finish state.
|
||
|
|
RAPIDJSON_ASSERT(d == IterativeParsingFinishState);
|
||
|
|
state_ = d;
|
||
|
|
|
||
|
|
// If StopWhenDone is not set...
|
||
|
|
if (!(parseFlags & kParseStopWhenDoneFlag)) {
|
||
|
|
// ... and extra non-whitespace data is found...
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
if (is.Peek() != '\0') {
|
||
|
|
// ... this is considered an error.
|
||
|
|
HandleError(state_, is);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Success! We are done!
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Transition to the new state.
|
||
|
|
state_ = d;
|
||
|
|
|
||
|
|
// If we parsed anything other than a delimiter, we invoked the handler, so we can return true now.
|
||
|
|
if (!IsIterativeParsingDelimiterState(n))
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
// We reached the end of file.
|
||
|
|
stack_.Clear();
|
||
|
|
|
||
|
|
if (state_ != IterativeParsingFinishState) {
|
||
|
|
HandleError(state_, is);
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
//! Check if token-by-token parsing JSON text is complete
|
||
|
|
/*! \return Whether the JSON has been fully decoded.
|
||
|
|
*/
|
||
|
|
RAPIDJSON_FORCEINLINE bool IterativeParseComplete() const {
|
||
|
|
return IsIterativeParsingCompleteState(state_);
|
||
|
|
}
|
||
|
|
|
||
|
|
//! Whether a parse error has occurred in the last parsing.
|
||
|
|
bool HasParseError() const { return parseResult_.IsError(); }
|
||
|
|
|
||
|
|
//! Get the \ref ParseErrorCode of last parsing.
|
||
|
|
ParseErrorCode GetParseErrorCode() const { return parseResult_.Code(); }
|
||
|
|
|
||
|
|
//! Get the position of last parsing error in input, 0 otherwise.
|
||
|
|
size_t GetErrorOffset() const { return parseResult_.Offset(); }
|
||
|
|
|
||
|
|
protected:
|
||
|
|
void SetParseError(ParseErrorCode code, size_t offset) { parseResult_.Set(code, offset); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
// Prohibit copy constructor & assignment operator.
|
||
|
|
GenericReader(const GenericReader&);
|
||
|
|
GenericReader& operator=(const GenericReader&);
|
||
|
|
|
||
|
|
void ClearStack() { stack_.Clear(); }
|
||
|
|
|
||
|
|
// clear stack on any exit from ParseStream, e.g. due to exception
|
||
|
|
struct ClearStackOnExit {
|
||
|
|
explicit ClearStackOnExit(GenericReader& r) : r_(r) {}
|
||
|
|
~ClearStackOnExit() { r_.ClearStack(); }
|
||
|
|
private:
|
||
|
|
GenericReader& r_;
|
||
|
|
ClearStackOnExit(const ClearStackOnExit&);
|
||
|
|
ClearStackOnExit& operator=(const ClearStackOnExit&);
|
||
|
|
};
|
||
|
|
|
||
|
|
template<unsigned parseFlags, typename InputStream>
|
||
|
|
void SkipWhitespaceAndComments(InputStream& is) {
|
||
|
|
SkipWhitespace(is);
|
||
|
|
|
||
|
|
if (parseFlags & kParseCommentsFlag) {
|
||
|
|
while (RAPIDJSON_UNLIKELY(Consume(is, '/'))) {
|
||
|
|
if (Consume(is, '*')) {
|
||
|
|
while (true) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(is.Peek() == '\0'))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell());
|
||
|
|
else if (Consume(is, '*')) {
|
||
|
|
if (Consume(is, '/'))
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
is.Take();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (RAPIDJSON_LIKELY(Consume(is, '/')))
|
||
|
|
while (is.Peek() != '\0' && is.Take() != '\n') {}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell());
|
||
|
|
|
||
|
|
SkipWhitespace(is);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse object: { string : value, ... }
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseObject(InputStream& is, Handler& handler) {
|
||
|
|
RAPIDJSON_ASSERT(is.Peek() == '{');
|
||
|
|
is.Take(); // Skip '{'
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.StartObject()))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
if (Consume(is, '}')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.EndObject(0))) // empty object
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (SizeType memberCount = 0;;) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(is.Peek() != '"'))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissName, is.Tell());
|
||
|
|
|
||
|
|
ParseString<parseFlags>(is, handler, true);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(!Consume(is, ':')))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissColon, is.Tell());
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
ParseValue<parseFlags>(is, handler);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
++memberCount;
|
||
|
|
|
||
|
|
switch (is.Peek()) {
|
||
|
|
case ',':
|
||
|
|
is.Take();
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
break;
|
||
|
|
case '}':
|
||
|
|
is.Take();
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.EndObject(memberCount)))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
return;
|
||
|
|
default:
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissCommaOrCurlyBracket, is.Tell()); break; // This useless break is only for making warning and coverage happy
|
||
|
|
}
|
||
|
|
|
||
|
|
if (parseFlags & kParseTrailingCommasFlag) {
|
||
|
|
if (is.Peek() == '}') {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.EndObject(memberCount)))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
is.Take();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse array: [ value, ... ]
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseArray(InputStream& is, Handler& handler) {
|
||
|
|
RAPIDJSON_ASSERT(is.Peek() == '[');
|
||
|
|
is.Take(); // Skip '['
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.StartArray()))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
if (Consume(is, ']')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.EndArray(0))) // empty array
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
for (SizeType elementCount = 0;;) {
|
||
|
|
ParseValue<parseFlags>(is, handler);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
++elementCount;
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
|
||
|
|
if (Consume(is, ',')) {
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
}
|
||
|
|
else if (Consume(is, ']')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.EndArray(elementCount)))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell());
|
||
|
|
|
||
|
|
if (parseFlags & kParseTrailingCommasFlag) {
|
||
|
|
if (is.Peek() == ']') {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.EndArray(elementCount)))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
is.Take();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseNull(InputStream& is, Handler& handler) {
|
||
|
|
RAPIDJSON_ASSERT(is.Peek() == 'n');
|
||
|
|
is.Take();
|
||
|
|
|
||
|
|
if (RAPIDJSON_LIKELY(Consume(is, 'u') && Consume(is, 'l') && Consume(is, 'l'))) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.Null()))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell());
|
||
|
|
}
|
||
|
|
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseTrue(InputStream& is, Handler& handler) {
|
||
|
|
RAPIDJSON_ASSERT(is.Peek() == 't');
|
||
|
|
is.Take();
|
||
|
|
|
||
|
|
if (RAPIDJSON_LIKELY(Consume(is, 'r') && Consume(is, 'u') && Consume(is, 'e'))) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.Bool(true)))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell());
|
||
|
|
}
|
||
|
|
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseFalse(InputStream& is, Handler& handler) {
|
||
|
|
RAPIDJSON_ASSERT(is.Peek() == 'f');
|
||
|
|
is.Take();
|
||
|
|
|
||
|
|
if (RAPIDJSON_LIKELY(Consume(is, 'a') && Consume(is, 'l') && Consume(is, 's') && Consume(is, 'e'))) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(!handler.Bool(false)))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell());
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename InputStream>
|
||
|
|
RAPIDJSON_FORCEINLINE static bool Consume(InputStream& is, typename InputStream::Ch expect) {
|
||
|
|
if (RAPIDJSON_LIKELY(is.Peek() == expect)) {
|
||
|
|
is.Take();
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Helper function to parse four hexadecimal digits in \uXXXX in ParseString().
|
||
|
|
template<typename InputStream>
|
||
|
|
unsigned ParseHex4(InputStream& is, size_t escapeOffset) {
|
||
|
|
unsigned codepoint = 0;
|
||
|
|
for (int i = 0; i < 4; i++) {
|
||
|
|
Ch c = is.Peek();
|
||
|
|
codepoint <<= 4;
|
||
|
|
codepoint += static_cast<unsigned>(c);
|
||
|
|
if (c >= '0' && c <= '9')
|
||
|
|
codepoint -= '0';
|
||
|
|
else if (c >= 'A' && c <= 'F')
|
||
|
|
codepoint -= 'A' - 10;
|
||
|
|
else if (c >= 'a' && c <= 'f')
|
||
|
|
codepoint -= 'a' - 10;
|
||
|
|
else {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorStringUnicodeEscapeInvalidHex, escapeOffset);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(0);
|
||
|
|
}
|
||
|
|
is.Take();
|
||
|
|
}
|
||
|
|
return codepoint;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename CharType>
|
||
|
|
class StackStream {
|
||
|
|
public:
|
||
|
|
typedef CharType Ch;
|
||
|
|
|
||
|
|
StackStream(internal::Stack<StackAllocator>& stack) : stack_(stack), length_(0) {}
|
||
|
|
RAPIDJSON_FORCEINLINE void Put(Ch c) {
|
||
|
|
*stack_.template Push<Ch>() = c;
|
||
|
|
++length_;
|
||
|
|
}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE void* Push(SizeType count) {
|
||
|
|
length_ += count;
|
||
|
|
return stack_.template Push<Ch>(count);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t Length() const { return length_; }
|
||
|
|
|
||
|
|
Ch* Pop() {
|
||
|
|
return stack_.template Pop<Ch>(length_);
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
StackStream(const StackStream&);
|
||
|
|
StackStream& operator=(const StackStream&);
|
||
|
|
|
||
|
|
internal::Stack<StackAllocator>& stack_;
|
||
|
|
SizeType length_;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Parse string and generate String event. Different code paths for kParseInsituFlag.
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseString(InputStream& is, Handler& handler, bool isKey = false) {
|
||
|
|
internal::StreamLocalCopy<InputStream> copy(is);
|
||
|
|
InputStream& s(copy.s);
|
||
|
|
|
||
|
|
RAPIDJSON_ASSERT(s.Peek() == '\"');
|
||
|
|
s.Take(); // Skip '\"'
|
||
|
|
|
||
|
|
bool success = false;
|
||
|
|
if (parseFlags & kParseInsituFlag) {
|
||
|
|
typename InputStream::Ch *head = s.PutBegin();
|
||
|
|
ParseStringToStream<parseFlags, SourceEncoding, SourceEncoding>(s, s);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
size_t length = s.PutEnd(head) - 1;
|
||
|
|
RAPIDJSON_ASSERT(length <= 0xFFFFFFFF);
|
||
|
|
const typename TargetEncoding::Ch* const str = reinterpret_cast<typename TargetEncoding::Ch*>(head);
|
||
|
|
success = (isKey ? handler.Key(str, SizeType(length), false) : handler.String(str, SizeType(length), false));
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
StackStream<typename TargetEncoding::Ch> stackStream(stack_);
|
||
|
|
ParseStringToStream<parseFlags, SourceEncoding, TargetEncoding>(s, stackStream);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
SizeType length = static_cast<SizeType>(stackStream.Length()) - 1;
|
||
|
|
const typename TargetEncoding::Ch* const str = stackStream.Pop();
|
||
|
|
success = (isKey ? handler.Key(str, length, true) : handler.String(str, length, true));
|
||
|
|
}
|
||
|
|
if (RAPIDJSON_UNLIKELY(!success))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, s.Tell());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse string to an output is
|
||
|
|
// This function handles the prefix/suffix double quotes, escaping, and optional encoding validation.
|
||
|
|
template<unsigned parseFlags, typename SEncoding, typename TEncoding, typename InputStream, typename OutputStream>
|
||
|
|
RAPIDJSON_FORCEINLINE void ParseStringToStream(InputStream& is, OutputStream& os) {
|
||
|
|
//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
|
||
|
|
#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
|
||
|
|
static const char escape[256] = {
|
||
|
|
Z16, Z16, 0, 0,'\"', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, '/',
|
||
|
|
Z16, Z16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'\\', 0, 0, 0,
|
||
|
|
0, 0,'\b', 0, 0, 0,'\f', 0, 0, 0, 0, 0, 0, 0,'\n', 0,
|
||
|
|
0, 0,'\r', 0,'\t', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
||
|
|
Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16
|
||
|
|
};
|
||
|
|
#undef Z16
|
||
|
|
//!@endcond
|
||
|
|
|
||
|
|
for (;;) {
|
||
|
|
// Scan and copy string before "\\\"" or < 0x20. This is an optional optimzation.
|
||
|
|
if (!(parseFlags & kParseValidateEncodingFlag))
|
||
|
|
ScanCopyUnescapedString(is, os);
|
||
|
|
|
||
|
|
Ch c = is.Peek();
|
||
|
|
if (RAPIDJSON_UNLIKELY(c == '\\')) { // Escape
|
||
|
|
size_t escapeOffset = is.Tell(); // For invalid escaping, report the initial '\\' as error offset
|
||
|
|
is.Take();
|
||
|
|
Ch e = is.Peek();
|
||
|
|
if ((sizeof(Ch) == 1 || unsigned(e) < 256) && RAPIDJSON_LIKELY(escape[static_cast<unsigned char>(e)])) {
|
||
|
|
is.Take();
|
||
|
|
os.Put(static_cast<typename TEncoding::Ch>(escape[static_cast<unsigned char>(e)]));
|
||
|
|
}
|
||
|
|
else if ((parseFlags & kParseEscapedApostropheFlag) && RAPIDJSON_LIKELY(e == '\'')) { // Allow escaped apostrophe
|
||
|
|
is.Take();
|
||
|
|
os.Put('\'');
|
||
|
|
}
|
||
|
|
else if (RAPIDJSON_LIKELY(e == 'u')) { // Unicode
|
||
|
|
is.Take();
|
||
|
|
unsigned codepoint = ParseHex4(is, escapeOffset);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
if (RAPIDJSON_UNLIKELY(codepoint >= 0xD800 && codepoint <= 0xDFFF)) {
|
||
|
|
// high surrogate, check if followed by valid low surrogate
|
||
|
|
if (RAPIDJSON_LIKELY(codepoint <= 0xDBFF)) {
|
||
|
|
// Handle UTF-16 surrogate pair
|
||
|
|
if (RAPIDJSON_UNLIKELY(!Consume(is, '\\') || !Consume(is, 'u')))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, escapeOffset);
|
||
|
|
unsigned codepoint2 = ParseHex4(is, escapeOffset);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
|
||
|
|
if (RAPIDJSON_UNLIKELY(codepoint2 < 0xDC00 || codepoint2 > 0xDFFF))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, escapeOffset);
|
||
|
|
codepoint = (((codepoint - 0xD800) << 10) | (codepoint2 - 0xDC00)) + 0x10000;
|
||
|
|
}
|
||
|
|
// single low surrogate
|
||
|
|
else
|
||
|
|
{
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, escapeOffset);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
TEncoding::Encode(os, codepoint);
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringEscapeInvalid, escapeOffset);
|
||
|
|
}
|
||
|
|
else if (RAPIDJSON_UNLIKELY(c == '"')) { // Closing double quote
|
||
|
|
is.Take();
|
||
|
|
os.Put('\0'); // null-terminate the string
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else if (RAPIDJSON_UNLIKELY(static_cast<unsigned>(c) < 0x20)) { // RFC 4627: unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
|
||
|
|
if (c == '\0')
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringMissQuotationMark, is.Tell());
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringInvalidEncoding, is.Tell());
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
size_t offset = is.Tell();
|
||
|
|
if (RAPIDJSON_UNLIKELY((parseFlags & kParseValidateEncodingFlag ?
|
||
|
|
!Transcoder<SEncoding, TEncoding>::Validate(is, os) :
|
||
|
|
!Transcoder<SEncoding, TEncoding>::Transcode(is, os))))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorStringInvalidEncoding, offset);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename InputStream, typename OutputStream>
|
||
|
|
static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(InputStream&, OutputStream&) {
|
||
|
|
// Do nothing for generic version
|
||
|
|
}
|
||
|
|
|
||
|
|
#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42)
|
||
|
|
// StringStream -> StackStream<char>
|
||
|
|
static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(StringStream& is, StackStream<char>& os) {
|
||
|
|
const char* p = is.src_;
|
||
|
|
|
||
|
|
// Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
while (p != nextAligned)
|
||
|
|
if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
|
||
|
|
is.src_ = p;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
os.Put(*p++);
|
||
|
|
|
||
|
|
// The rest of string using SIMD
|
||
|
|
static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
|
||
|
|
static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
|
||
|
|
static const char space[16] = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
|
||
|
|
const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
|
||
|
|
const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
|
||
|
|
const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
|
||
|
|
|
||
|
|
for (;; p += 16) {
|
||
|
|
const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
|
||
|
|
const __m128i t1 = _mm_cmpeq_epi8(s, dq);
|
||
|
|
const __m128i t2 = _mm_cmpeq_epi8(s, bs);
|
||
|
|
const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
|
||
|
|
const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
|
||
|
|
unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
|
||
|
|
if (RAPIDJSON_UNLIKELY(r != 0)) { // some of characters is escaped
|
||
|
|
SizeType length;
|
||
|
|
#ifdef _MSC_VER // Find the index of first escaped
|
||
|
|
unsigned long offset;
|
||
|
|
_BitScanForward(&offset, r);
|
||
|
|
length = offset;
|
||
|
|
#else
|
||
|
|
length = static_cast<SizeType>(__builtin_ffs(r) - 1);
|
||
|
|
#endif
|
||
|
|
if (length != 0) {
|
||
|
|
char* q = reinterpret_cast<char*>(os.Push(length));
|
||
|
|
for (size_t i = 0; i < length; i++)
|
||
|
|
q[i] = p[i];
|
||
|
|
|
||
|
|
p += length;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
_mm_storeu_si128(reinterpret_cast<__m128i *>(os.Push(16)), s);
|
||
|
|
}
|
||
|
|
|
||
|
|
is.src_ = p;
|
||
|
|
}
|
||
|
|
|
||
|
|
// InsituStringStream -> InsituStringStream
|
||
|
|
static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(InsituStringStream& is, InsituStringStream& os) {
|
||
|
|
RAPIDJSON_ASSERT(&is == &os);
|
||
|
|
(void)os;
|
||
|
|
|
||
|
|
if (is.src_ == is.dst_) {
|
||
|
|
SkipUnescapedString(is);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
char* p = is.src_;
|
||
|
|
char *q = is.dst_;
|
||
|
|
|
||
|
|
// Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
while (p != nextAligned)
|
||
|
|
if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
|
||
|
|
is.src_ = p;
|
||
|
|
is.dst_ = q;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
*q++ = *p++;
|
||
|
|
|
||
|
|
// The rest of string using SIMD
|
||
|
|
static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
|
||
|
|
static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
|
||
|
|
static const char space[16] = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
|
||
|
|
const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
|
||
|
|
const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
|
||
|
|
const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
|
||
|
|
|
||
|
|
for (;; p += 16, q += 16) {
|
||
|
|
const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
|
||
|
|
const __m128i t1 = _mm_cmpeq_epi8(s, dq);
|
||
|
|
const __m128i t2 = _mm_cmpeq_epi8(s, bs);
|
||
|
|
const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
|
||
|
|
const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
|
||
|
|
unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
|
||
|
|
if (RAPIDJSON_UNLIKELY(r != 0)) { // some of characters is escaped
|
||
|
|
size_t length;
|
||
|
|
#ifdef _MSC_VER // Find the index of first escaped
|
||
|
|
unsigned long offset;
|
||
|
|
_BitScanForward(&offset, r);
|
||
|
|
length = offset;
|
||
|
|
#else
|
||
|
|
length = static_cast<size_t>(__builtin_ffs(r) - 1);
|
||
|
|
#endif
|
||
|
|
for (const char* pend = p + length; p != pend; )
|
||
|
|
*q++ = *p++;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
_mm_storeu_si128(reinterpret_cast<__m128i *>(q), s);
|
||
|
|
}
|
||
|
|
|
||
|
|
is.src_ = p;
|
||
|
|
is.dst_ = q;
|
||
|
|
}
|
||
|
|
|
||
|
|
// When read/write pointers are the same for insitu stream, just skip unescaped characters
|
||
|
|
static RAPIDJSON_FORCEINLINE void SkipUnescapedString(InsituStringStream& is) {
|
||
|
|
RAPIDJSON_ASSERT(is.src_ == is.dst_);
|
||
|
|
char* p = is.src_;
|
||
|
|
|
||
|
|
// Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
for (; p != nextAligned; p++)
|
||
|
|
if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
|
||
|
|
is.src_ = is.dst_ = p;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// The rest of string using SIMD
|
||
|
|
static const char dquote[16] = { '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"', '\"' };
|
||
|
|
static const char bslash[16] = { '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\', '\\' };
|
||
|
|
static const char space[16] = { 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F, 0x1F };
|
||
|
|
const __m128i dq = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&dquote[0]));
|
||
|
|
const __m128i bs = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&bslash[0]));
|
||
|
|
const __m128i sp = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&space[0]));
|
||
|
|
|
||
|
|
for (;; p += 16) {
|
||
|
|
const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
|
||
|
|
const __m128i t1 = _mm_cmpeq_epi8(s, dq);
|
||
|
|
const __m128i t2 = _mm_cmpeq_epi8(s, bs);
|
||
|
|
const __m128i t3 = _mm_cmpeq_epi8(_mm_max_epu8(s, sp), sp); // s < 0x20 <=> max(s, 0x1F) == 0x1F
|
||
|
|
const __m128i x = _mm_or_si128(_mm_or_si128(t1, t2), t3);
|
||
|
|
unsigned short r = static_cast<unsigned short>(_mm_movemask_epi8(x));
|
||
|
|
if (RAPIDJSON_UNLIKELY(r != 0)) { // some of characters is escaped
|
||
|
|
size_t length;
|
||
|
|
#ifdef _MSC_VER // Find the index of first escaped
|
||
|
|
unsigned long offset;
|
||
|
|
_BitScanForward(&offset, r);
|
||
|
|
length = offset;
|
||
|
|
#else
|
||
|
|
length = static_cast<size_t>(__builtin_ffs(r) - 1);
|
||
|
|
#endif
|
||
|
|
p += length;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
is.src_ = is.dst_ = p;
|
||
|
|
}
|
||
|
|
#elif defined(RAPIDJSON_NEON)
|
||
|
|
// StringStream -> StackStream<char>
|
||
|
|
static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(StringStream& is, StackStream<char>& os) {
|
||
|
|
const char* p = is.src_;
|
||
|
|
|
||
|
|
// Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
while (p != nextAligned)
|
||
|
|
if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
|
||
|
|
is.src_ = p;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
os.Put(*p++);
|
||
|
|
|
||
|
|
// The rest of string using SIMD
|
||
|
|
const uint8x16_t s0 = vmovq_n_u8('"');
|
||
|
|
const uint8x16_t s1 = vmovq_n_u8('\\');
|
||
|
|
const uint8x16_t s2 = vmovq_n_u8('\b');
|
||
|
|
const uint8x16_t s3 = vmovq_n_u8(32);
|
||
|
|
|
||
|
|
for (;; p += 16) {
|
||
|
|
const uint8x16_t s = vld1q_u8(reinterpret_cast<const uint8_t *>(p));
|
||
|
|
uint8x16_t x = vceqq_u8(s, s0);
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, s1));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, s2));
|
||
|
|
x = vorrq_u8(x, vcltq_u8(s, s3));
|
||
|
|
|
||
|
|
x = vrev64q_u8(x); // Rev in 64
|
||
|
|
uint64_t low = vgetq_lane_u64(vreinterpretq_u64_u8(x), 0); // extract
|
||
|
|
uint64_t high = vgetq_lane_u64(vreinterpretq_u64_u8(x), 1); // extract
|
||
|
|
|
||
|
|
SizeType length = 0;
|
||
|
|
bool escaped = false;
|
||
|
|
if (low == 0) {
|
||
|
|
if (high != 0) {
|
||
|
|
uint32_t lz = internal::clzll(high);
|
||
|
|
length = 8 + (lz >> 3);
|
||
|
|
escaped = true;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
uint32_t lz = internal::clzll(low);
|
||
|
|
length = lz >> 3;
|
||
|
|
escaped = true;
|
||
|
|
}
|
||
|
|
if (RAPIDJSON_UNLIKELY(escaped)) { // some of characters is escaped
|
||
|
|
if (length != 0) {
|
||
|
|
char* q = reinterpret_cast<char*>(os.Push(length));
|
||
|
|
for (size_t i = 0; i < length; i++)
|
||
|
|
q[i] = p[i];
|
||
|
|
|
||
|
|
p += length;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
vst1q_u8(reinterpret_cast<uint8_t *>(os.Push(16)), s);
|
||
|
|
}
|
||
|
|
|
||
|
|
is.src_ = p;
|
||
|
|
}
|
||
|
|
|
||
|
|
// InsituStringStream -> InsituStringStream
|
||
|
|
static RAPIDJSON_FORCEINLINE void ScanCopyUnescapedString(InsituStringStream& is, InsituStringStream& os) {
|
||
|
|
RAPIDJSON_ASSERT(&is == &os);
|
||
|
|
(void)os;
|
||
|
|
|
||
|
|
if (is.src_ == is.dst_) {
|
||
|
|
SkipUnescapedString(is);
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
char* p = is.src_;
|
||
|
|
char *q = is.dst_;
|
||
|
|
|
||
|
|
// Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
while (p != nextAligned)
|
||
|
|
if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
|
||
|
|
is.src_ = p;
|
||
|
|
is.dst_ = q;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
*q++ = *p++;
|
||
|
|
|
||
|
|
// The rest of string using SIMD
|
||
|
|
const uint8x16_t s0 = vmovq_n_u8('"');
|
||
|
|
const uint8x16_t s1 = vmovq_n_u8('\\');
|
||
|
|
const uint8x16_t s2 = vmovq_n_u8('\b');
|
||
|
|
const uint8x16_t s3 = vmovq_n_u8(32);
|
||
|
|
|
||
|
|
for (;; p += 16, q += 16) {
|
||
|
|
const uint8x16_t s = vld1q_u8(reinterpret_cast<uint8_t *>(p));
|
||
|
|
uint8x16_t x = vceqq_u8(s, s0);
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, s1));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, s2));
|
||
|
|
x = vorrq_u8(x, vcltq_u8(s, s3));
|
||
|
|
|
||
|
|
x = vrev64q_u8(x); // Rev in 64
|
||
|
|
uint64_t low = vgetq_lane_u64(vreinterpretq_u64_u8(x), 0); // extract
|
||
|
|
uint64_t high = vgetq_lane_u64(vreinterpretq_u64_u8(x), 1); // extract
|
||
|
|
|
||
|
|
SizeType length = 0;
|
||
|
|
bool escaped = false;
|
||
|
|
if (low == 0) {
|
||
|
|
if (high != 0) {
|
||
|
|
uint32_t lz = internal::clzll(high);
|
||
|
|
length = 8 + (lz >> 3);
|
||
|
|
escaped = true;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
uint32_t lz = internal::clzll(low);
|
||
|
|
length = lz >> 3;
|
||
|
|
escaped = true;
|
||
|
|
}
|
||
|
|
if (RAPIDJSON_UNLIKELY(escaped)) { // some of characters is escaped
|
||
|
|
for (const char* pend = p + length; p != pend; ) {
|
||
|
|
*q++ = *p++;
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
vst1q_u8(reinterpret_cast<uint8_t *>(q), s);
|
||
|
|
}
|
||
|
|
|
||
|
|
is.src_ = p;
|
||
|
|
is.dst_ = q;
|
||
|
|
}
|
||
|
|
|
||
|
|
// When read/write pointers are the same for insitu stream, just skip unescaped characters
|
||
|
|
static RAPIDJSON_FORCEINLINE void SkipUnescapedString(InsituStringStream& is) {
|
||
|
|
RAPIDJSON_ASSERT(is.src_ == is.dst_);
|
||
|
|
char* p = is.src_;
|
||
|
|
|
||
|
|
// Scan one by one until alignment (unaligned load may cross page boundary and cause crash)
|
||
|
|
const char* nextAligned = reinterpret_cast<const char*>((reinterpret_cast<size_t>(p) + 15) & static_cast<size_t>(~15));
|
||
|
|
for (; p != nextAligned; p++)
|
||
|
|
if (RAPIDJSON_UNLIKELY(*p == '\"') || RAPIDJSON_UNLIKELY(*p == '\\') || RAPIDJSON_UNLIKELY(static_cast<unsigned>(*p) < 0x20)) {
|
||
|
|
is.src_ = is.dst_ = p;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// The rest of string using SIMD
|
||
|
|
const uint8x16_t s0 = vmovq_n_u8('"');
|
||
|
|
const uint8x16_t s1 = vmovq_n_u8('\\');
|
||
|
|
const uint8x16_t s2 = vmovq_n_u8('\b');
|
||
|
|
const uint8x16_t s3 = vmovq_n_u8(32);
|
||
|
|
|
||
|
|
for (;; p += 16) {
|
||
|
|
const uint8x16_t s = vld1q_u8(reinterpret_cast<uint8_t *>(p));
|
||
|
|
uint8x16_t x = vceqq_u8(s, s0);
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, s1));
|
||
|
|
x = vorrq_u8(x, vceqq_u8(s, s2));
|
||
|
|
x = vorrq_u8(x, vcltq_u8(s, s3));
|
||
|
|
|
||
|
|
x = vrev64q_u8(x); // Rev in 64
|
||
|
|
uint64_t low = vgetq_lane_u64(vreinterpretq_u64_u8(x), 0); // extract
|
||
|
|
uint64_t high = vgetq_lane_u64(vreinterpretq_u64_u8(x), 1); // extract
|
||
|
|
|
||
|
|
if (low == 0) {
|
||
|
|
if (high != 0) {
|
||
|
|
uint32_t lz = internal::clzll(high);
|
||
|
|
p += 8 + (lz >> 3);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
uint32_t lz = internal::clzll(low);
|
||
|
|
p += lz >> 3;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
is.src_ = is.dst_ = p;
|
||
|
|
}
|
||
|
|
#endif // RAPIDJSON_NEON
|
||
|
|
|
||
|
|
template<typename InputStream, bool backup, bool pushOnTake>
|
||
|
|
class NumberStream;
|
||
|
|
|
||
|
|
template<typename InputStream>
|
||
|
|
class NumberStream<InputStream, false, false> {
|
||
|
|
public:
|
||
|
|
typedef typename InputStream::Ch Ch;
|
||
|
|
|
||
|
|
NumberStream(GenericReader& reader, InputStream& s) : is(s) { (void)reader; }
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE Ch Peek() const { return is.Peek(); }
|
||
|
|
RAPIDJSON_FORCEINLINE Ch TakePush() { return is.Take(); }
|
||
|
|
RAPIDJSON_FORCEINLINE Ch Take() { return is.Take(); }
|
||
|
|
RAPIDJSON_FORCEINLINE void Push(char) {}
|
||
|
|
|
||
|
|
size_t Tell() { return is.Tell(); }
|
||
|
|
size_t Length() { return 0; }
|
||
|
|
const char* Pop() { return 0; }
|
||
|
|
|
||
|
|
protected:
|
||
|
|
NumberStream& operator=(const NumberStream&);
|
||
|
|
|
||
|
|
InputStream& is;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename InputStream>
|
||
|
|
class NumberStream<InputStream, true, false> : public NumberStream<InputStream, false, false> {
|
||
|
|
typedef NumberStream<InputStream, false, false> Base;
|
||
|
|
public:
|
||
|
|
NumberStream(GenericReader& reader, InputStream& is) : Base(reader, is), stackStream(reader.stack_) {}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE Ch TakePush() {
|
||
|
|
stackStream.Put(static_cast<char>(Base::is.Peek()));
|
||
|
|
return Base::is.Take();
|
||
|
|
}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE void Push(char c) {
|
||
|
|
stackStream.Put(c);
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t Length() { return stackStream.Length(); }
|
||
|
|
|
||
|
|
const char* Pop() {
|
||
|
|
stackStream.Put('\0');
|
||
|
|
return stackStream.Pop();
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
StackStream<char> stackStream;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename InputStream>
|
||
|
|
class NumberStream<InputStream, true, true> : public NumberStream<InputStream, true, false> {
|
||
|
|
typedef NumberStream<InputStream, true, false> Base;
|
||
|
|
public:
|
||
|
|
NumberStream(GenericReader& reader, InputStream& is) : Base(reader, is) {}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE Ch Take() { return Base::TakePush(); }
|
||
|
|
};
|
||
|
|
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseNumber(InputStream& is, Handler& handler) {
|
||
|
|
internal::StreamLocalCopy<InputStream> copy(is);
|
||
|
|
NumberStream<InputStream,
|
||
|
|
((parseFlags & kParseNumbersAsStringsFlag) != 0) ?
|
||
|
|
((parseFlags & kParseInsituFlag) == 0) :
|
||
|
|
((parseFlags & kParseFullPrecisionFlag) != 0),
|
||
|
|
(parseFlags & kParseNumbersAsStringsFlag) != 0 &&
|
||
|
|
(parseFlags & kParseInsituFlag) == 0> s(*this, copy.s);
|
||
|
|
|
||
|
|
size_t startOffset = s.Tell();
|
||
|
|
double d = 0.0;
|
||
|
|
bool useNanOrInf = false;
|
||
|
|
|
||
|
|
// Parse minus
|
||
|
|
bool minus = Consume(s, '-');
|
||
|
|
|
||
|
|
// Parse int: zero / ( digit1-9 *DIGIT )
|
||
|
|
unsigned i = 0;
|
||
|
|
uint64_t i64 = 0;
|
||
|
|
bool use64bit = false;
|
||
|
|
int significandDigit = 0;
|
||
|
|
if (RAPIDJSON_UNLIKELY(s.Peek() == '0')) {
|
||
|
|
i = 0;
|
||
|
|
s.TakePush();
|
||
|
|
}
|
||
|
|
else if (RAPIDJSON_LIKELY(s.Peek() >= '1' && s.Peek() <= '9')) {
|
||
|
|
i = static_cast<unsigned>(s.TakePush() - '0');
|
||
|
|
|
||
|
|
if (minus)
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(i >= 214748364)) { // 2^31 = 2147483648
|
||
|
|
if (RAPIDJSON_LIKELY(i != 214748364 || s.Peek() > '8')) {
|
||
|
|
i64 = i;
|
||
|
|
use64bit = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
i = i * 10 + static_cast<unsigned>(s.TakePush() - '0');
|
||
|
|
significandDigit++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(i >= 429496729)) { // 2^32 - 1 = 4294967295
|
||
|
|
if (RAPIDJSON_LIKELY(i != 429496729 || s.Peek() > '5')) {
|
||
|
|
i64 = i;
|
||
|
|
use64bit = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
i = i * 10 + static_cast<unsigned>(s.TakePush() - '0');
|
||
|
|
significandDigit++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Parse NaN or Infinity here
|
||
|
|
else if ((parseFlags & kParseNanAndInfFlag) && RAPIDJSON_LIKELY((s.Peek() == 'I' || s.Peek() == 'N'))) {
|
||
|
|
if (Consume(s, 'N')) {
|
||
|
|
if (Consume(s, 'a') && Consume(s, 'N')) {
|
||
|
|
d = std::numeric_limits<double>::quiet_NaN();
|
||
|
|
useNanOrInf = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else if (RAPIDJSON_LIKELY(Consume(s, 'I'))) {
|
||
|
|
if (Consume(s, 'n') && Consume(s, 'f')) {
|
||
|
|
d = (minus ? -std::numeric_limits<double>::infinity() : std::numeric_limits<double>::infinity());
|
||
|
|
useNanOrInf = true;
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(s.Peek() == 'i' && !(Consume(s, 'i') && Consume(s, 'n')
|
||
|
|
&& Consume(s, 'i') && Consume(s, 't') && Consume(s, 'y')))) {
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(!useNanOrInf)) {
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
|
||
|
|
|
||
|
|
// Parse 64bit int
|
||
|
|
bool useDouble = false;
|
||
|
|
if (use64bit) {
|
||
|
|
if (minus)
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(i64 >= RAPIDJSON_UINT64_C2(0x0CCCCCCC, 0xCCCCCCCC))) // 2^63 = 9223372036854775808
|
||
|
|
if (RAPIDJSON_LIKELY(i64 != RAPIDJSON_UINT64_C2(0x0CCCCCCC, 0xCCCCCCCC) || s.Peek() > '8')) {
|
||
|
|
d = static_cast<double>(i64);
|
||
|
|
useDouble = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
|
||
|
|
significandDigit++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
if (RAPIDJSON_UNLIKELY(i64 >= RAPIDJSON_UINT64_C2(0x19999999, 0x99999999))) // 2^64 - 1 = 18446744073709551615
|
||
|
|
if (RAPIDJSON_LIKELY(i64 != RAPIDJSON_UINT64_C2(0x19999999, 0x99999999) || s.Peek() > '5')) {
|
||
|
|
d = static_cast<double>(i64);
|
||
|
|
useDouble = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
|
||
|
|
significandDigit++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Force double for big integer
|
||
|
|
if (useDouble) {
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
d = d * 10 + (s.TakePush() - '0');
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse frac = decimal-point 1*DIGIT
|
||
|
|
int expFrac = 0;
|
||
|
|
size_t decimalPosition;
|
||
|
|
if (Consume(s, '.')) {
|
||
|
|
decimalPosition = s.Length();
|
||
|
|
|
||
|
|
if (RAPIDJSON_UNLIKELY(!(s.Peek() >= '0' && s.Peek() <= '9')))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorNumberMissFraction, s.Tell());
|
||
|
|
|
||
|
|
if (!useDouble) {
|
||
|
|
#if RAPIDJSON_64BIT
|
||
|
|
// Use i64 to store significand in 64-bit architecture
|
||
|
|
if (!use64bit)
|
||
|
|
i64 = i;
|
||
|
|
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
if (i64 > RAPIDJSON_UINT64_C2(0x1FFFFF, 0xFFFFFFFF)) // 2^53 - 1 for fast path
|
||
|
|
break;
|
||
|
|
else {
|
||
|
|
i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
|
||
|
|
--expFrac;
|
||
|
|
if (i64 != 0)
|
||
|
|
significandDigit++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
d = static_cast<double>(i64);
|
||
|
|
#else
|
||
|
|
// Use double to store significand in 32-bit architecture
|
||
|
|
d = static_cast<double>(use64bit ? i64 : i);
|
||
|
|
#endif
|
||
|
|
useDouble = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
if (significandDigit < 17) {
|
||
|
|
d = d * 10.0 + (s.TakePush() - '0');
|
||
|
|
--expFrac;
|
||
|
|
if (RAPIDJSON_LIKELY(d > 0.0))
|
||
|
|
significandDigit++;
|
||
|
|
}
|
||
|
|
else
|
||
|
|
s.TakePush();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
decimalPosition = s.Length(); // decimal position at the end of integer.
|
||
|
|
|
||
|
|
// Parse exp = e [ minus / plus ] 1*DIGIT
|
||
|
|
int exp = 0;
|
||
|
|
if (Consume(s, 'e') || Consume(s, 'E')) {
|
||
|
|
if (!useDouble) {
|
||
|
|
d = static_cast<double>(use64bit ? i64 : i);
|
||
|
|
useDouble = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool expMinus = false;
|
||
|
|
if (Consume(s, '+'))
|
||
|
|
;
|
||
|
|
else if (Consume(s, '-'))
|
||
|
|
expMinus = true;
|
||
|
|
|
||
|
|
if (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
exp = static_cast<int>(s.Take() - '0');
|
||
|
|
if (expMinus) {
|
||
|
|
// (exp + expFrac) must not underflow int => we're detecting when -exp gets
|
||
|
|
// dangerously close to INT_MIN (a pessimistic next digit 9 would push it into
|
||
|
|
// underflow territory):
|
||
|
|
//
|
||
|
|
// -(exp * 10 + 9) + expFrac >= INT_MIN
|
||
|
|
// <=> exp <= (expFrac - INT_MIN - 9) / 10
|
||
|
|
RAPIDJSON_ASSERT(expFrac <= 0);
|
||
|
|
int maxExp = (expFrac + 2147483639) / 10;
|
||
|
|
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
exp = exp * 10 + static_cast<int>(s.Take() - '0');
|
||
|
|
if (RAPIDJSON_UNLIKELY(exp > maxExp)) {
|
||
|
|
while (RAPIDJSON_UNLIKELY(s.Peek() >= '0' && s.Peek() <= '9')) // Consume the rest of exponent
|
||
|
|
s.Take();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else { // positive exp
|
||
|
|
int maxExp = 308 - expFrac;
|
||
|
|
while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
|
||
|
|
exp = exp * 10 + static_cast<int>(s.Take() - '0');
|
||
|
|
if (RAPIDJSON_UNLIKELY(exp > maxExp))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, startOffset);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorNumberMissExponent, s.Tell());
|
||
|
|
|
||
|
|
if (expMinus)
|
||
|
|
exp = -exp;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Finish parsing, call event according to the type of number.
|
||
|
|
bool cont = true;
|
||
|
|
|
||
|
|
if (parseFlags & kParseNumbersAsStringsFlag) {
|
||
|
|
if (parseFlags & kParseInsituFlag) {
|
||
|
|
s.Pop(); // Pop stack no matter if it will be used or not.
|
||
|
|
typename InputStream::Ch* head = is.PutBegin();
|
||
|
|
const size_t length = s.Tell() - startOffset;
|
||
|
|
RAPIDJSON_ASSERT(length <= 0xFFFFFFFF);
|
||
|
|
// unable to insert the \0 character here, it will erase the comma after this number
|
||
|
|
const typename TargetEncoding::Ch* const str = reinterpret_cast<typename TargetEncoding::Ch*>(head);
|
||
|
|
cont = handler.RawNumber(str, SizeType(length), false);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
SizeType numCharsToCopy = static_cast<SizeType>(s.Length());
|
||
|
|
StringStream srcStream(s.Pop());
|
||
|
|
StackStream<typename TargetEncoding::Ch> dstStream(stack_);
|
||
|
|
while (numCharsToCopy--) {
|
||
|
|
Transcoder<UTF8<>, TargetEncoding>::Transcode(srcStream, dstStream);
|
||
|
|
}
|
||
|
|
dstStream.Put('\0');
|
||
|
|
const typename TargetEncoding::Ch* str = dstStream.Pop();
|
||
|
|
const SizeType length = static_cast<SizeType>(dstStream.Length()) - 1;
|
||
|
|
cont = handler.RawNumber(str, SizeType(length), true);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
size_t length = s.Length();
|
||
|
|
const char* decimal = s.Pop(); // Pop stack no matter if it will be used or not.
|
||
|
|
|
||
|
|
if (useDouble) {
|
||
|
|
int p = exp + expFrac;
|
||
|
|
if (parseFlags & kParseFullPrecisionFlag)
|
||
|
|
d = internal::StrtodFullPrecision(d, p, decimal, length, decimalPosition, exp);
|
||
|
|
else
|
||
|
|
d = internal::StrtodNormalPrecision(d, p);
|
||
|
|
|
||
|
|
// Use > max, instead of == inf, to fix bogus warning -Wfloat-equal
|
||
|
|
if (d > (std::numeric_limits<double>::max)()) {
|
||
|
|
// Overflow
|
||
|
|
// TODO: internal::StrtodX should report overflow (or underflow)
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, startOffset);
|
||
|
|
}
|
||
|
|
|
||
|
|
cont = handler.Double(minus ? -d : d);
|
||
|
|
}
|
||
|
|
else if (useNanOrInf) {
|
||
|
|
cont = handler.Double(d);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (use64bit) {
|
||
|
|
if (minus)
|
||
|
|
cont = handler.Int64(static_cast<int64_t>(~i64 + 1));
|
||
|
|
else
|
||
|
|
cont = handler.Uint64(i64);
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
if (minus)
|
||
|
|
cont = handler.Int(static_cast<int32_t>(~i + 1));
|
||
|
|
else
|
||
|
|
cont = handler.Uint(i);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (RAPIDJSON_UNLIKELY(!cont))
|
||
|
|
RAPIDJSON_PARSE_ERROR(kParseErrorTermination, startOffset);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Parse any JSON value
|
||
|
|
template<unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
void ParseValue(InputStream& is, Handler& handler) {
|
||
|
|
switch (is.Peek()) {
|
||
|
|
case 'n': ParseNull <parseFlags>(is, handler); break;
|
||
|
|
case 't': ParseTrue <parseFlags>(is, handler); break;
|
||
|
|
case 'f': ParseFalse <parseFlags>(is, handler); break;
|
||
|
|
case '"': ParseString<parseFlags>(is, handler); break;
|
||
|
|
case '{': ParseObject<parseFlags>(is, handler); break;
|
||
|
|
case '[': ParseArray <parseFlags>(is, handler); break;
|
||
|
|
default :
|
||
|
|
ParseNumber<parseFlags>(is, handler);
|
||
|
|
break;
|
||
|
|
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Iterative Parsing
|
||
|
|
|
||
|
|
// States
|
||
|
|
enum IterativeParsingState {
|
||
|
|
IterativeParsingFinishState = 0, // sink states at top
|
||
|
|
IterativeParsingErrorState, // sink states at top
|
||
|
|
IterativeParsingStartState,
|
||
|
|
|
||
|
|
// Object states
|
||
|
|
IterativeParsingObjectInitialState,
|
||
|
|
IterativeParsingMemberKeyState,
|
||
|
|
IterativeParsingMemberValueState,
|
||
|
|
IterativeParsingObjectFinishState,
|
||
|
|
|
||
|
|
// Array states
|
||
|
|
IterativeParsingArrayInitialState,
|
||
|
|
IterativeParsingElementState,
|
||
|
|
IterativeParsingArrayFinishState,
|
||
|
|
|
||
|
|
// Single value state
|
||
|
|
IterativeParsingValueState,
|
||
|
|
|
||
|
|
// Delimiter states (at bottom)
|
||
|
|
IterativeParsingElementDelimiterState,
|
||
|
|
IterativeParsingMemberDelimiterState,
|
||
|
|
IterativeParsingKeyValueDelimiterState,
|
||
|
|
|
||
|
|
cIterativeParsingStateCount
|
||
|
|
};
|
||
|
|
|
||
|
|
// Tokens
|
||
|
|
enum Token {
|
||
|
|
LeftBracketToken = 0,
|
||
|
|
RightBracketToken,
|
||
|
|
|
||
|
|
LeftCurlyBracketToken,
|
||
|
|
RightCurlyBracketToken,
|
||
|
|
|
||
|
|
CommaToken,
|
||
|
|
ColonToken,
|
||
|
|
|
||
|
|
StringToken,
|
||
|
|
FalseToken,
|
||
|
|
TrueToken,
|
||
|
|
NullToken,
|
||
|
|
NumberToken,
|
||
|
|
|
||
|
|
kTokenCount
|
||
|
|
};
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE Token Tokenize(Ch c) const {
|
||
|
|
|
||
|
|
//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
|
||
|
|
#define N NumberToken
|
||
|
|
#define N16 N,N,N,N,N,N,N,N,N,N,N,N,N,N,N,N
|
||
|
|
// Maps from ASCII to Token
|
||
|
|
static const unsigned char tokenMap[256] = {
|
||
|
|
N16, // 00~0F
|
||
|
|
N16, // 10~1F
|
||
|
|
N, N, StringToken, N, N, N, N, N, N, N, N, N, CommaToken, N, N, N, // 20~2F
|
||
|
|
N, N, N, N, N, N, N, N, N, N, ColonToken, N, N, N, N, N, // 30~3F
|
||
|
|
N16, // 40~4F
|
||
|
|
N, N, N, N, N, N, N, N, N, N, N, LeftBracketToken, N, RightBracketToken, N, N, // 50~5F
|
||
|
|
N, N, N, N, N, N, FalseToken, N, N, N, N, N, N, N, NullToken, N, // 60~6F
|
||
|
|
N, N, N, N, TrueToken, N, N, N, N, N, N, LeftCurlyBracketToken, N, RightCurlyBracketToken, N, N, // 70~7F
|
||
|
|
N16, N16, N16, N16, N16, N16, N16, N16 // 80~FF
|
||
|
|
};
|
||
|
|
#undef N
|
||
|
|
#undef N16
|
||
|
|
//!@endcond
|
||
|
|
|
||
|
|
if (sizeof(Ch) == 1 || static_cast<unsigned>(c) < 256)
|
||
|
|
return static_cast<Token>(tokenMap[static_cast<unsigned char>(c)]);
|
||
|
|
else
|
||
|
|
return NumberToken;
|
||
|
|
}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE IterativeParsingState Predict(IterativeParsingState state, Token token) const {
|
||
|
|
// current state x one lookahead token -> new state
|
||
|
|
static const char G[cIterativeParsingStateCount][kTokenCount] = {
|
||
|
|
// Finish(sink state)
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState
|
||
|
|
},
|
||
|
|
// Error(sink state)
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState
|
||
|
|
},
|
||
|
|
// Start
|
||
|
|
{
|
||
|
|
IterativeParsingArrayInitialState, // Left bracket
|
||
|
|
IterativeParsingErrorState, // Right bracket
|
||
|
|
IterativeParsingObjectInitialState, // Left curly bracket
|
||
|
|
IterativeParsingErrorState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingValueState, // String
|
||
|
|
IterativeParsingValueState, // False
|
||
|
|
IterativeParsingValueState, // True
|
||
|
|
IterativeParsingValueState, // Null
|
||
|
|
IterativeParsingValueState // Number
|
||
|
|
},
|
||
|
|
// ObjectInitial
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, // Left bracket
|
||
|
|
IterativeParsingErrorState, // Right bracket
|
||
|
|
IterativeParsingErrorState, // Left curly bracket
|
||
|
|
IterativeParsingObjectFinishState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingMemberKeyState, // String
|
||
|
|
IterativeParsingErrorState, // False
|
||
|
|
IterativeParsingErrorState, // True
|
||
|
|
IterativeParsingErrorState, // Null
|
||
|
|
IterativeParsingErrorState // Number
|
||
|
|
},
|
||
|
|
// MemberKey
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, // Left bracket
|
||
|
|
IterativeParsingErrorState, // Right bracket
|
||
|
|
IterativeParsingErrorState, // Left curly bracket
|
||
|
|
IterativeParsingErrorState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingKeyValueDelimiterState, // Colon
|
||
|
|
IterativeParsingErrorState, // String
|
||
|
|
IterativeParsingErrorState, // False
|
||
|
|
IterativeParsingErrorState, // True
|
||
|
|
IterativeParsingErrorState, // Null
|
||
|
|
IterativeParsingErrorState // Number
|
||
|
|
},
|
||
|
|
// MemberValue
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, // Left bracket
|
||
|
|
IterativeParsingErrorState, // Right bracket
|
||
|
|
IterativeParsingErrorState, // Left curly bracket
|
||
|
|
IterativeParsingObjectFinishState, // Right curly bracket
|
||
|
|
IterativeParsingMemberDelimiterState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingErrorState, // String
|
||
|
|
IterativeParsingErrorState, // False
|
||
|
|
IterativeParsingErrorState, // True
|
||
|
|
IterativeParsingErrorState, // Null
|
||
|
|
IterativeParsingErrorState // Number
|
||
|
|
},
|
||
|
|
// ObjectFinish(sink state)
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState
|
||
|
|
},
|
||
|
|
// ArrayInitial
|
||
|
|
{
|
||
|
|
IterativeParsingArrayInitialState, // Left bracket(push Element state)
|
||
|
|
IterativeParsingArrayFinishState, // Right bracket
|
||
|
|
IterativeParsingObjectInitialState, // Left curly bracket(push Element state)
|
||
|
|
IterativeParsingErrorState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingElementState, // String
|
||
|
|
IterativeParsingElementState, // False
|
||
|
|
IterativeParsingElementState, // True
|
||
|
|
IterativeParsingElementState, // Null
|
||
|
|
IterativeParsingElementState // Number
|
||
|
|
},
|
||
|
|
// Element
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, // Left bracket
|
||
|
|
IterativeParsingArrayFinishState, // Right bracket
|
||
|
|
IterativeParsingErrorState, // Left curly bracket
|
||
|
|
IterativeParsingErrorState, // Right curly bracket
|
||
|
|
IterativeParsingElementDelimiterState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingErrorState, // String
|
||
|
|
IterativeParsingErrorState, // False
|
||
|
|
IterativeParsingErrorState, // True
|
||
|
|
IterativeParsingErrorState, // Null
|
||
|
|
IterativeParsingErrorState // Number
|
||
|
|
},
|
||
|
|
// ArrayFinish(sink state)
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState
|
||
|
|
},
|
||
|
|
// Single Value (sink state)
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState, IterativeParsingErrorState,
|
||
|
|
IterativeParsingErrorState
|
||
|
|
},
|
||
|
|
// ElementDelimiter
|
||
|
|
{
|
||
|
|
IterativeParsingArrayInitialState, // Left bracket(push Element state)
|
||
|
|
IterativeParsingArrayFinishState, // Right bracket
|
||
|
|
IterativeParsingObjectInitialState, // Left curly bracket(push Element state)
|
||
|
|
IterativeParsingErrorState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingElementState, // String
|
||
|
|
IterativeParsingElementState, // False
|
||
|
|
IterativeParsingElementState, // True
|
||
|
|
IterativeParsingElementState, // Null
|
||
|
|
IterativeParsingElementState // Number
|
||
|
|
},
|
||
|
|
// MemberDelimiter
|
||
|
|
{
|
||
|
|
IterativeParsingErrorState, // Left bracket
|
||
|
|
IterativeParsingErrorState, // Right bracket
|
||
|
|
IterativeParsingErrorState, // Left curly bracket
|
||
|
|
IterativeParsingObjectFinishState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingMemberKeyState, // String
|
||
|
|
IterativeParsingErrorState, // False
|
||
|
|
IterativeParsingErrorState, // True
|
||
|
|
IterativeParsingErrorState, // Null
|
||
|
|
IterativeParsingErrorState // Number
|
||
|
|
},
|
||
|
|
// KeyValueDelimiter
|
||
|
|
{
|
||
|
|
IterativeParsingArrayInitialState, // Left bracket(push MemberValue state)
|
||
|
|
IterativeParsingErrorState, // Right bracket
|
||
|
|
IterativeParsingObjectInitialState, // Left curly bracket(push MemberValue state)
|
||
|
|
IterativeParsingErrorState, // Right curly bracket
|
||
|
|
IterativeParsingErrorState, // Comma
|
||
|
|
IterativeParsingErrorState, // Colon
|
||
|
|
IterativeParsingMemberValueState, // String
|
||
|
|
IterativeParsingMemberValueState, // False
|
||
|
|
IterativeParsingMemberValueState, // True
|
||
|
|
IterativeParsingMemberValueState, // Null
|
||
|
|
IterativeParsingMemberValueState // Number
|
||
|
|
},
|
||
|
|
}; // End of G
|
||
|
|
|
||
|
|
return static_cast<IterativeParsingState>(G[state][token]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Make an advance in the token stream and state based on the candidate destination state which was returned by Transit().
|
||
|
|
// May return a new state on state pop.
|
||
|
|
template <unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
RAPIDJSON_FORCEINLINE IterativeParsingState Transit(IterativeParsingState src, Token token, IterativeParsingState dst, InputStream& is, Handler& handler) {
|
||
|
|
(void)token;
|
||
|
|
|
||
|
|
switch (dst) {
|
||
|
|
case IterativeParsingErrorState:
|
||
|
|
return dst;
|
||
|
|
|
||
|
|
case IterativeParsingObjectInitialState:
|
||
|
|
case IterativeParsingArrayInitialState:
|
||
|
|
{
|
||
|
|
// Push the state(Element or MemeberValue) if we are nested in another array or value of member.
|
||
|
|
// In this way we can get the correct state on ObjectFinish or ArrayFinish by frame pop.
|
||
|
|
IterativeParsingState n = src;
|
||
|
|
if (src == IterativeParsingArrayInitialState || src == IterativeParsingElementDelimiterState)
|
||
|
|
n = IterativeParsingElementState;
|
||
|
|
else if (src == IterativeParsingKeyValueDelimiterState)
|
||
|
|
n = IterativeParsingMemberValueState;
|
||
|
|
// Push current state.
|
||
|
|
*stack_.template Push<SizeType>(1) = n;
|
||
|
|
// Initialize and push the member/element count.
|
||
|
|
*stack_.template Push<SizeType>(1) = 0;
|
||
|
|
// Call handler
|
||
|
|
bool hr = (dst == IterativeParsingObjectInitialState) ? handler.StartObject() : handler.StartArray();
|
||
|
|
// On handler short circuits the parsing.
|
||
|
|
if (!hr) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorTermination, is.Tell());
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
is.Take();
|
||
|
|
return dst;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
case IterativeParsingMemberKeyState:
|
||
|
|
ParseString<parseFlags>(is, handler, true);
|
||
|
|
if (HasParseError())
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
else
|
||
|
|
return dst;
|
||
|
|
|
||
|
|
case IterativeParsingKeyValueDelimiterState:
|
||
|
|
RAPIDJSON_ASSERT(token == ColonToken);
|
||
|
|
is.Take();
|
||
|
|
return dst;
|
||
|
|
|
||
|
|
case IterativeParsingMemberValueState:
|
||
|
|
// Must be non-compound value. Or it would be ObjectInitial or ArrayInitial state.
|
||
|
|
ParseValue<parseFlags>(is, handler);
|
||
|
|
if (HasParseError()) {
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
return dst;
|
||
|
|
|
||
|
|
case IterativeParsingElementState:
|
||
|
|
// Must be non-compound value. Or it would be ObjectInitial or ArrayInitial state.
|
||
|
|
ParseValue<parseFlags>(is, handler);
|
||
|
|
if (HasParseError()) {
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
return dst;
|
||
|
|
|
||
|
|
case IterativeParsingMemberDelimiterState:
|
||
|
|
case IterativeParsingElementDelimiterState:
|
||
|
|
is.Take();
|
||
|
|
// Update member/element count.
|
||
|
|
*stack_.template Top<SizeType>() = *stack_.template Top<SizeType>() + 1;
|
||
|
|
return dst;
|
||
|
|
|
||
|
|
case IterativeParsingObjectFinishState:
|
||
|
|
{
|
||
|
|
// Transit from delimiter is only allowed when trailing commas are enabled
|
||
|
|
if (!(parseFlags & kParseTrailingCommasFlag) && src == IterativeParsingMemberDelimiterState) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorObjectMissName, is.Tell());
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
// Get member count.
|
||
|
|
SizeType c = *stack_.template Pop<SizeType>(1);
|
||
|
|
// If the object is not empty, count the last member.
|
||
|
|
if (src == IterativeParsingMemberValueState)
|
||
|
|
++c;
|
||
|
|
// Restore the state.
|
||
|
|
IterativeParsingState n = static_cast<IterativeParsingState>(*stack_.template Pop<SizeType>(1));
|
||
|
|
// Transit to Finish state if this is the topmost scope.
|
||
|
|
if (n == IterativeParsingStartState)
|
||
|
|
n = IterativeParsingFinishState;
|
||
|
|
// Call handler
|
||
|
|
bool hr = handler.EndObject(c);
|
||
|
|
// On handler short circuits the parsing.
|
||
|
|
if (!hr) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorTermination, is.Tell());
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
is.Take();
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
case IterativeParsingArrayFinishState:
|
||
|
|
{
|
||
|
|
// Transit from delimiter is only allowed when trailing commas are enabled
|
||
|
|
if (!(parseFlags & kParseTrailingCommasFlag) && src == IterativeParsingElementDelimiterState) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorValueInvalid, is.Tell());
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
// Get element count.
|
||
|
|
SizeType c = *stack_.template Pop<SizeType>(1);
|
||
|
|
// If the array is not empty, count the last element.
|
||
|
|
if (src == IterativeParsingElementState)
|
||
|
|
++c;
|
||
|
|
// Restore the state.
|
||
|
|
IterativeParsingState n = static_cast<IterativeParsingState>(*stack_.template Pop<SizeType>(1));
|
||
|
|
// Transit to Finish state if this is the topmost scope.
|
||
|
|
if (n == IterativeParsingStartState)
|
||
|
|
n = IterativeParsingFinishState;
|
||
|
|
// Call handler
|
||
|
|
bool hr = handler.EndArray(c);
|
||
|
|
// On handler short circuits the parsing.
|
||
|
|
if (!hr) {
|
||
|
|
RAPIDJSON_PARSE_ERROR_NORETURN(kParseErrorTermination, is.Tell());
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
else {
|
||
|
|
is.Take();
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
default:
|
||
|
|
// This branch is for IterativeParsingValueState actually.
|
||
|
|
// Use `default:` rather than
|
||
|
|
// `case IterativeParsingValueState:` is for code coverage.
|
||
|
|
|
||
|
|
// The IterativeParsingStartState is not enumerated in this switch-case.
|
||
|
|
// It is impossible for that case. And it can be caught by following assertion.
|
||
|
|
|
||
|
|
// The IterativeParsingFinishState is not enumerated in this switch-case either.
|
||
|
|
// It is a "derivative" state which cannot triggered from Predict() directly.
|
||
|
|
// Therefore it cannot happen here. And it can be caught by following assertion.
|
||
|
|
RAPIDJSON_ASSERT(dst == IterativeParsingValueState);
|
||
|
|
|
||
|
|
// Must be non-compound value. Or it would be ObjectInitial or ArrayInitial state.
|
||
|
|
ParseValue<parseFlags>(is, handler);
|
||
|
|
if (HasParseError()) {
|
||
|
|
return IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
return IterativeParsingFinishState;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
template <typename InputStream>
|
||
|
|
void HandleError(IterativeParsingState src, InputStream& is) {
|
||
|
|
if (HasParseError()) {
|
||
|
|
// Error flag has been set.
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (src) {
|
||
|
|
case IterativeParsingStartState: RAPIDJSON_PARSE_ERROR(kParseErrorDocumentEmpty, is.Tell()); return;
|
||
|
|
case IterativeParsingFinishState: RAPIDJSON_PARSE_ERROR(kParseErrorDocumentRootNotSingular, is.Tell()); return;
|
||
|
|
case IterativeParsingObjectInitialState:
|
||
|
|
case IterativeParsingMemberDelimiterState: RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissName, is.Tell()); return;
|
||
|
|
case IterativeParsingMemberKeyState: RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissColon, is.Tell()); return;
|
||
|
|
case IterativeParsingMemberValueState: RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissCommaOrCurlyBracket, is.Tell()); return;
|
||
|
|
case IterativeParsingKeyValueDelimiterState:
|
||
|
|
case IterativeParsingArrayInitialState:
|
||
|
|
case IterativeParsingElementDelimiterState: RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell()); return;
|
||
|
|
default: RAPIDJSON_ASSERT(src == IterativeParsingElementState); RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell()); return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE bool IsIterativeParsingDelimiterState(IterativeParsingState s) const {
|
||
|
|
return s >= IterativeParsingElementDelimiterState;
|
||
|
|
}
|
||
|
|
|
||
|
|
RAPIDJSON_FORCEINLINE bool IsIterativeParsingCompleteState(IterativeParsingState s) const {
|
||
|
|
return s <= IterativeParsingErrorState;
|
||
|
|
}
|
||
|
|
|
||
|
|
template <unsigned parseFlags, typename InputStream, typename Handler>
|
||
|
|
ParseResult IterativeParse(InputStream& is, Handler& handler) {
|
||
|
|
parseResult_.Clear();
|
||
|
|
ClearStackOnExit scope(*this);
|
||
|
|
IterativeParsingState state = IterativeParsingStartState;
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
while (is.Peek() != '\0') {
|
||
|
|
Token t = Tokenize(is.Peek());
|
||
|
|
IterativeParsingState n = Predict(state, t);
|
||
|
|
IterativeParsingState d = Transit<parseFlags>(state, t, n, is, handler);
|
||
|
|
|
||
|
|
if (d == IterativeParsingErrorState) {
|
||
|
|
HandleError(state, is);
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
state = d;
|
||
|
|
|
||
|
|
// Do not further consume streams if a root JSON has been parsed.
|
||
|
|
if ((parseFlags & kParseStopWhenDoneFlag) && state == IterativeParsingFinishState)
|
||
|
|
break;
|
||
|
|
|
||
|
|
SkipWhitespaceAndComments<parseFlags>(is);
|
||
|
|
RAPIDJSON_PARSE_ERROR_EARLY_RETURN(parseResult_);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Handle the end of file.
|
||
|
|
if (state != IterativeParsingFinishState)
|
||
|
|
HandleError(state, is);
|
||
|
|
|
||
|
|
return parseResult_;
|
||
|
|
}
|
||
|
|
|
||
|
|
static const size_t kDefaultStackCapacity = 256; //!< Default stack capacity in bytes for storing a single decoded string.
|
||
|
|
internal::Stack<StackAllocator> stack_; //!< A stack for storing decoded string temporarily during non-destructive parsing.
|
||
|
|
ParseResult parseResult_;
|
||
|
|
IterativeParsingState state_;
|
||
|
|
}; // class GenericReader
|
||
|
|
|
||
|
|
//! Reader with UTF8 encoding and default allocator.
|
||
|
|
typedef GenericReader<UTF8<>, UTF8<> > Reader;
|
||
|
|
|
||
|
|
RAPIDJSON_NAMESPACE_END
|
||
|
|
|
||
|
|
#if defined(__clang__) || defined(_MSC_VER)
|
||
|
|
RAPIDJSON_DIAG_POP
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#ifdef __GNUC__
|
||
|
|
RAPIDJSON_DIAG_POP
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#endif // RAPIDJSON_READER_H_
|