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authorRiccardo Spagni <ric@spagni.net>2016-09-17 09:35:49 +0200
committerRiccardo Spagni <ric@spagni.net>2016-09-17 09:35:49 +0200
commitf62ebc5c811b76c05327dd56877024df60a47a9b (patch)
tree81e98c9bf5d11e1bb7e2bff81105af879d43a32a /external/rapidjson/reader.h
parentMerge pull request #1081 (diff)
downloadmonero-f62ebc5c811b76c05327dd56877024df60a47a9b.tar.xz
update rapidjson
Diffstat (limited to 'external/rapidjson/reader.h')
-rw-r--r--external/rapidjson/reader.h3399
1 files changed, 1879 insertions, 1520 deletions
diff --git a/external/rapidjson/reader.h b/external/rapidjson/reader.h
index 8628b53fa..19f8849b1 100644
--- a/external/rapidjson/reader.h
+++ b/external/rapidjson/reader.h
@@ -1,1520 +1,1879 @@
-// Tencent is pleased to support the open source community by making RapidJSON available.
-//
-// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
-//
-// Licensed under the MIT License (the "License"); you may not use this file except
-// in compliance with the License. You may obtain a copy of the License at
-//
-// http://opensource.org/licenses/MIT
-//
-// Unless required by applicable law or agreed to in writing, software distributed
-// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-// CONDITIONS OF ANY KIND, either express or implied. See the License for the
-// specific language governing permissions and limitations under the License.
-
-#ifndef RAPIDJSON_READER_H_
-#define RAPIDJSON_READER_H_
-
-/*! \file reader.h */
-
-#include "rapidjson.h"
-#include "encodings.h"
-#include "internal/meta.h"
-#include "internal/stack.h"
-#include "internal/strtod.h"
-
-#if defined(RAPIDJSON_SIMD) && defined(_MSC_VER)
-#include <intrin.h>
-#pragma intrinsic(_BitScanForward)
-#endif
-#ifdef RAPIDJSON_SSE42
-#include <nmmintrin.h>
-#elif defined(RAPIDJSON_SSE2)
-#include <emmintrin.h>
-#endif
-
-#ifdef _MSC_VER
-RAPIDJSON_DIAG_PUSH
-RAPIDJSON_DIAG_OFF(4127) // conditional expression is constant
-RAPIDJSON_DIAG_OFF(4702) // unreachable code
-#endif
-
-#ifdef __clang__
-RAPIDJSON_DIAG_PUSH
-RAPIDJSON_DIAG_OFF(padded)
-RAPIDJSON_DIAG_OFF(switch-enum)
-#endif
-
-#ifdef __GNUC__
-RAPIDJSON_DIAG_PUSH
-RAPIDJSON_DIAG_OFF(effc++)
-#endif
-
-//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
-#define RAPIDJSON_NOTHING /* deliberately empty */
-#ifndef RAPIDJSON_PARSE_ERROR_EARLY_RETURN
-#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN(value) \
- RAPIDJSON_MULTILINEMACRO_BEGIN \
- if (HasParseError()) { return value; } \
- RAPIDJSON_MULTILINEMACRO_END
-#endif
-#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID \
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN(RAPIDJSON_NOTHING)
-//!@endcond
-
-/*! \def RAPIDJSON_PARSE_ERROR_NORETURN
- \ingroup RAPIDJSON_ERRORS
- \brief Macro to indicate a parse error.
- \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
- \param offset position of the error in JSON input (\c size_t)
-
- This macros can be used as a customization point for the internal
- error handling mechanism of RapidJSON.
-
- A common usage model is to throw an exception instead of requiring the
- caller to explicitly check the \ref rapidjson::GenericReader::Parse's
- return value:
-
- \code
- #define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode,offset) \
- throw ParseException(parseErrorCode, #parseErrorCode, offset)
-
- #include <stdexcept> // std::runtime_error
- #include "rapidjson/error/error.h" // rapidjson::ParseResult
-
- struct ParseException : std::runtime_error, rapidjson::ParseResult {
- ParseException(rapidjson::ParseErrorCode code, const char* msg, size_t offset)
- : std::runtime_error(msg), ParseResult(code, offset) {}
- };
-
- #include "rapidjson/reader.h"
- \endcode
-
- \see RAPIDJSON_PARSE_ERROR, rapidjson::GenericReader::Parse
- */
-#ifndef RAPIDJSON_PARSE_ERROR_NORETURN
-#define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset) \
- RAPIDJSON_MULTILINEMACRO_BEGIN \
- RAPIDJSON_ASSERT(!HasParseError()); /* Error can only be assigned once */ \
- SetParseError(parseErrorCode, offset); \
- RAPIDJSON_MULTILINEMACRO_END
-#endif
-
-/*! \def RAPIDJSON_PARSE_ERROR
- \ingroup RAPIDJSON_ERRORS
- \brief (Internal) macro to indicate and handle a parse error.
- \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
- \param offset position of the error in JSON input (\c size_t)
-
- Invokes RAPIDJSON_PARSE_ERROR_NORETURN and stops the parsing.
-
- \see RAPIDJSON_PARSE_ERROR_NORETURN
- \hideinitializer
- */
-#ifndef RAPIDJSON_PARSE_ERROR
-#define RAPIDJSON_PARSE_ERROR(parseErrorCode, offset) \
- RAPIDJSON_MULTILINEMACRO_BEGIN \
- RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset); \
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID; \
- RAPIDJSON_MULTILINEMACRO_END
-#endif
-
-#include "error/error.h" // ParseErrorCode, ParseResult
-
-RAPIDJSON_NAMESPACE_BEGIN
-
-///////////////////////////////////////////////////////////////////////////////
-// ParseFlag
-
-/*! \def RAPIDJSON_PARSE_DEFAULT_FLAGS
- \ingroup RAPIDJSON_CONFIG
- \brief User-defined kParseDefaultFlags definition.
-
- User can define this as any \c ParseFlag combinations.
-*/
-#ifndef RAPIDJSON_PARSE_DEFAULT_FLAGS
-#define RAPIDJSON_PARSE_DEFAULT_FLAGS kParseNoFlags
-#endif
-
-//! Combination of parseFlags
-/*! \see Reader::Parse, Document::Parse, Document::ParseInsitu, Document::ParseStream
- */
-enum ParseFlag {
- kParseNoFlags = 0, //!< No flags are set.
- kParseInsituFlag = 1, //!< In-situ(destructive) parsing.
- kParseValidateEncodingFlag = 2, //!< Validate encoding of JSON strings.
- kParseIterativeFlag = 4, //!< Iterative(constant complexity in terms of function call stack size) parsing.
- 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.
- kParseFullPrecisionFlag = 16, //!< Parse number in full precision (but slower).
- kParseCommentsFlag = 32, //!< Allow one-line (//) and multi-line (/**/) comments.
- kParseDefaultFlags = RAPIDJSON_PARSE_DEFAULT_FLAGS //!< Default parse flags. Can be customized by defining RAPIDJSON_PARSE_DEFAULT_FLAGS
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Handler
-
-/*! \class rapidjson::Handler
- \brief Concept for receiving events from GenericReader upon parsing.
- The functions return true if no error occurs. If they return false,
- the event publisher should terminate the process.
-\code
-concept Handler {
- typename Ch;
-
- bool Null();
- bool Bool(bool b);
- bool Int(int i);
- bool Uint(unsigned i);
- bool Int64(int64_t i);
- bool Uint64(uint64_t i);
- bool Double(double d);
- bool String(const Ch* str, SizeType length, bool copy);
- bool StartObject();
- bool Key(const Ch* str, SizeType length, bool copy);
- bool EndObject(SizeType memberCount);
- bool StartArray();
- bool EndArray(SizeType elementCount);
-};
-\endcode
-*/
-///////////////////////////////////////////////////////////////////////////////
-// BaseReaderHandler
-
-//! Default implementation of Handler.
-/*! This can be used as base class of any reader handler.
- \note implements Handler concept
-*/
-template<typename Encoding = UTF8<>, typename Derived = void>
-struct BaseReaderHandler {
- typedef typename Encoding::Ch Ch;
-
- typedef typename internal::SelectIf<internal::IsSame<Derived, void>, BaseReaderHandler, Derived>::Type Override;
-
- bool Default() { return true; }
- bool Null() { return static_cast<Override&>(*this).Default(); }
- bool Bool(bool) { return static_cast<Override&>(*this).Default(); }
- bool Int(int) { return static_cast<Override&>(*this).Default(); }
- bool Uint(unsigned) { return static_cast<Override&>(*this).Default(); }
- bool Int64(int64_t) { return static_cast<Override&>(*this).Default(); }
- bool Uint64(uint64_t) { return static_cast<Override&>(*this).Default(); }
- bool Double(double) { return static_cast<Override&>(*this).Default(); }
- bool String(const Ch*, SizeType, bool) { return static_cast<Override&>(*this).Default(); }
- bool StartObject() { return static_cast<Override&>(*this).Default(); }
- bool Key(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
- bool EndObject(SizeType) { return static_cast<Override&>(*this).Default(); }
- bool StartArray() { return static_cast<Override&>(*this).Default(); }
- bool EndArray(SizeType) { return static_cast<Override&>(*this).Default(); }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// StreamLocalCopy
-
-namespace internal {
-
-template<typename Stream, int = StreamTraits<Stream>::copyOptimization>
-class StreamLocalCopy;
-
-//! Do copy optimization.
-template<typename Stream>
-class StreamLocalCopy<Stream, 1> {
-public:
- StreamLocalCopy(Stream& original) : s(original), original_(original) {}
- ~StreamLocalCopy() { original_ = s; }
-
- Stream s;
-
-private:
- StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
-
- Stream& original_;
-};
-
-//! Keep reference.
-template<typename Stream>
-class StreamLocalCopy<Stream, 0> {
-public:
- StreamLocalCopy(Stream& original) : s(original) {}
-
- Stream& s;
-
-private:
- StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
-};
-
-} // namespace internal
-
-///////////////////////////////////////////////////////////////////////////////
-// SkipWhitespace
-
-//! Skip the JSON white spaces in a stream.
-/*! \param is A input stream for skipping white spaces.
- \note This function has SSE2/SSE4.2 specialization.
-*/
-template<typename InputStream>
-void SkipWhitespace(InputStream& is) {
- internal::StreamLocalCopy<InputStream> copy(is);
- InputStream& s(copy.s);
-
- while (s.Peek() == ' ' || s.Peek() == '\n' || s.Peek() == '\r' || s.Peek() == '\t')
- s.Take();
-}
-
-#ifdef RAPIDJSON_SSE42
-//! Skip whitespace with SSE 4.2 pcmpistrm instruction, 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;
-
- // The rest of string using SIMD
- static const char whitespace[16] = " \n\r\t";
- const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
-
- for (;; p += 16) {
- const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
- const int r = _mm_cvtsi128_si32(_mm_cmpistrm(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_BIT_MASK | _SIDD_NEGATIVE_POLARITY));
- if (r != 0) { // some of characters is 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
- }
- }
-}
-
-#elif defined(RAPIDJSON_SSE2)
-
-//! Skip whitespace with SSE2 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;
-
- // The rest of string
- static const char whitespaces[4][17] = {
- " ",
- "\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n",
- "\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r\r",
- "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t"};
-
- 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
- }
- }
-}
-
-#endif // RAPIDJSON_SSE2
-
-#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_);
-}
-#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_() {}
-
- //! 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 (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 (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);
- }
-
- //! Whether a parse error has occured 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 (is.Peek() == '/') {
- is.Take();
-
- if (is.Peek() == '*') {
- is.Take();
- while (true) {
- if (is.Peek() == '\0')
- RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell());
-
- if (is.Take() == '*') {
- if (is.Peek() == '\0')
- RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell());
-
- if (is.Take() == '/')
- break;
- }
- }
- } else if (is.Peek() == '/') {
- is.Take();
- 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 (!handler.StartObject())
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
-
- SkipWhitespaceAndComments<parseFlags>(is);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
-
- if (is.Peek() == '}') {
- is.Take();
- if (!handler.EndObject(0)) // empty object
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- return;
- }
-
- for (SizeType memberCount = 0;;) {
- if (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 (is.Take() != ':')
- 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.Take()) {
- case ',':
- SkipWhitespaceAndComments<parseFlags>(is);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
- break;
- case '}':
- if (!handler.EndObject(memberCount))
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- return;
- default:
- RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissCommaOrCurlyBracket, is.Tell());
- break;
- }
- }
- }
-
- // Parse array: [ value, ... ]
- template<unsigned parseFlags, typename InputStream, typename Handler>
- void ParseArray(InputStream& is, Handler& handler) {
- RAPIDJSON_ASSERT(is.Peek() == '[');
- is.Take(); // Skip '['
-
- if (!handler.StartArray())
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
-
- SkipWhitespaceAndComments<parseFlags>(is);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
-
- if (is.Peek() == ']') {
- is.Take();
- if (!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;
-
- switch (is.Take()) {
- case ',':
- SkipWhitespaceAndComments<parseFlags>(is);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
- break;
- case ']':
- if (!handler.EndArray(elementCount))
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- return;
- default:
- RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell());
- break;
- }
- }
- }
-
- template<unsigned parseFlags, typename InputStream, typename Handler>
- void ParseNull(InputStream& is, Handler& handler) {
- RAPIDJSON_ASSERT(is.Peek() == 'n');
- is.Take();
-
- if (is.Take() == 'u' && is.Take() == 'l' && is.Take() == 'l') {
- if (!handler.Null())
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- }
- else
- RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell() - 1);
- }
-
- template<unsigned parseFlags, typename InputStream, typename Handler>
- void ParseTrue(InputStream& is, Handler& handler) {
- RAPIDJSON_ASSERT(is.Peek() == 't');
- is.Take();
-
- if (is.Take() == 'r' && is.Take() == 'u' && is.Take() == 'e') {
- if (!handler.Bool(true))
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- }
- else
- RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell() - 1);
- }
-
- template<unsigned parseFlags, typename InputStream, typename Handler>
- void ParseFalse(InputStream& is, Handler& handler) {
- RAPIDJSON_ASSERT(is.Peek() == 'f');
- is.Take();
-
- if (is.Take() == 'a' && is.Take() == 'l' && is.Take() == 's' && is.Take() == 'e') {
- if (!handler.Bool(false))
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- }
- else
- RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, is.Tell() - 1);
- }
-
- // Helper function to parse four hexidecimal digits in \uXXXX in ParseString().
- template<typename InputStream>
- unsigned ParseHex4(InputStream& is) {
- unsigned codepoint = 0;
- for (int i = 0; i < 4; i++) {
- Ch c = is.Take();
- 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, is.Tell() - 1);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN(0);
- }
- }
- 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_;
- }
- 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);
-
- 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 (!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
-
- RAPIDJSON_ASSERT(is.Peek() == '\"');
- is.Take(); // Skip '\"'
-
- for (;;) {
- Ch c = is.Peek();
- if (c == '\\') { // Escape
- is.Take();
- Ch e = is.Take();
- if ((sizeof(Ch) == 1 || unsigned(e) < 256) && escape[static_cast<unsigned char>(e)])
- os.Put(static_cast<typename TEncoding::Ch>(escape[static_cast<unsigned char>(e)]));
- else if (e == 'u') { // Unicode
- unsigned codepoint = ParseHex4(is);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
- if (codepoint >= 0xD800 && codepoint <= 0xDBFF) {
- // Handle UTF-16 surrogate pair
- if (is.Take() != '\\' || is.Take() != 'u')
- RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, is.Tell() - 2);
- unsigned codepoint2 = ParseHex4(is);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
- if (codepoint2 < 0xDC00 || codepoint2 > 0xDFFF)
- RAPIDJSON_PARSE_ERROR(kParseErrorStringUnicodeSurrogateInvalid, is.Tell() - 2);
- codepoint = (((codepoint - 0xD800) << 10) | (codepoint2 - 0xDC00)) + 0x10000;
- }
- TEncoding::Encode(os, codepoint);
- }
- else
- RAPIDJSON_PARSE_ERROR(kParseErrorStringEscapeInvalid, is.Tell() - 1);
- }
- else if (c == '"') { // Closing double quote
- is.Take();
- os.Put('\0'); // null-terminate the string
- return;
- }
- else if (c == '\0')
- RAPIDJSON_PARSE_ERROR(kParseErrorStringMissQuotationMark, is.Tell() - 1);
- else if (static_cast<unsigned>(c) < 0x20) // RFC 4627: unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
- RAPIDJSON_PARSE_ERROR(kParseErrorStringEscapeInvalid, is.Tell() - 1);
- else {
- if (parseFlags & kParseValidateEncodingFlag ?
- !Transcoder<SEncoding, TEncoding>::Validate(is, os) :
- !Transcoder<SEncoding, TEncoding>::Transcode(is, os))
- RAPIDJSON_PARSE_ERROR(kParseErrorStringInvalidEncoding, is.Tell());
- }
- }
- }
-
- template<typename InputStream, bool backup>
- class NumberStream;
-
- template<typename InputStream>
- class NumberStream<InputStream, false> {
- public:
- NumberStream(GenericReader& reader, InputStream& s) : is(s) { (void)reader; }
- ~NumberStream() {}
-
- RAPIDJSON_FORCEINLINE Ch Peek() const { return is.Peek(); }
- RAPIDJSON_FORCEINLINE Ch TakePush() { return is.Take(); }
- RAPIDJSON_FORCEINLINE Ch Take() { return is.Take(); }
- 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> : public NumberStream<InputStream, false> {
- typedef NumberStream<InputStream, false> Base;
- public:
- NumberStream(GenericReader& reader, InputStream& is) : NumberStream<InputStream, false>(reader, is), stackStream(reader.stack_) {}
- ~NumberStream() {}
-
- RAPIDJSON_FORCEINLINE Ch TakePush() {
- stackStream.Put(static_cast<char>(Base::is.Peek()));
- return Base::is.Take();
- }
-
- size_t Length() { return stackStream.Length(); }
-
- const char* Pop() {
- stackStream.Put('\0');
- return stackStream.Pop();
- }
-
- private:
- StackStream<char> stackStream;
- };
-
- template<unsigned parseFlags, typename InputStream, typename Handler>
- void ParseNumber(InputStream& is, Handler& handler) {
- internal::StreamLocalCopy<InputStream> copy(is);
- NumberStream<InputStream, (parseFlags & kParseFullPrecisionFlag) != 0> s(*this, copy.s);
-
- // Parse minus
- bool minus = false;
- if (s.Peek() == '-') {
- minus = true;
- s.Take();
- }
-
- // Parse int: zero / ( digit1-9 *DIGIT )
- unsigned i = 0;
- uint64_t i64 = 0;
- bool use64bit = false;
- int significandDigit = 0;
- if (s.Peek() == '0') {
- i = 0;
- s.TakePush();
- }
- else if (s.Peek() >= '1' && s.Peek() <= '9') {
- i = static_cast<unsigned>(s.TakePush() - '0');
-
- if (minus)
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- if (i >= 214748364) { // 2^31 = 2147483648
- if (i != 214748364 || s.Peek() > '8') {
- i64 = i;
- use64bit = true;
- break;
- }
- }
- i = i * 10 + static_cast<unsigned>(s.TakePush() - '0');
- significandDigit++;
- }
- else
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- if (i >= 429496729) { // 2^32 - 1 = 4294967295
- if (i != 429496729 || s.Peek() > '5') {
- i64 = i;
- use64bit = true;
- break;
- }
- }
- i = i * 10 + static_cast<unsigned>(s.TakePush() - '0');
- significandDigit++;
- }
- }
- else
- RAPIDJSON_PARSE_ERROR(kParseErrorValueInvalid, s.Tell());
-
- // Parse 64bit int
- bool useDouble = false;
- double d = 0.0;
- if (use64bit) {
- if (minus)
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- if (i64 >= RAPIDJSON_UINT64_C2(0x0CCCCCCC, 0xCCCCCCCC)) // 2^63 = 9223372036854775808
- if (i64 != RAPIDJSON_UINT64_C2(0x0CCCCCCC, 0xCCCCCCCC) || s.Peek() > '8') {
- d = i64;
- useDouble = true;
- break;
- }
- i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
- significandDigit++;
- }
- else
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- if (i64 >= RAPIDJSON_UINT64_C2(0x19999999, 0x99999999)) // 2^64 - 1 = 18446744073709551615
- if (i64 != RAPIDJSON_UINT64_C2(0x19999999, 0x99999999) || s.Peek() > '5') {
- d = i64;
- useDouble = true;
- break;
- }
- i64 = i64 * 10 + static_cast<unsigned>(s.TakePush() - '0');
- significandDigit++;
- }
- }
-
- // Force double for big integer
- if (useDouble) {
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- if (d >= 1.7976931348623157e307) // DBL_MAX / 10.0
- RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, s.Tell());
- d = d * 10 + (s.TakePush() - '0');
- }
- }
-
- // Parse frac = decimal-point 1*DIGIT
- int expFrac = 0;
- size_t decimalPosition;
- if (s.Peek() == '.') {
- s.Take();
- decimalPosition = s.Length();
-
- if (!(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 (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 (s.Peek() >= '0' && s.Peek() <= '9') {
- if (significandDigit < 17) {
- d = d * 10.0 + (s.TakePush() - '0');
- --expFrac;
- if (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 (s.Peek() == 'e' || s.Peek() == 'E') {
- if (!useDouble) {
- d = use64bit ? i64 : i;
- useDouble = true;
- }
- s.Take();
-
- bool expMinus = false;
- if (s.Peek() == '+')
- s.Take();
- else if (s.Peek() == '-') {
- s.Take();
- expMinus = true;
- }
-
- if (s.Peek() >= '0' && s.Peek() <= '9') {
- exp = static_cast<int>(s.Take() - '0');
- if (expMinus) {
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- exp = exp * 10 + static_cast<int>(s.Take() - '0');
- if (exp >= 214748364) { // Issue #313: prevent overflow exponent
- while (s.Peek() >= '0' && s.Peek() <= '9') // Consume the rest of exponent
- s.Take();
- }
- }
- }
- else { // positive exp
- int maxExp = 308 - expFrac;
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- exp = exp * 10 + static_cast<int>(s.Take() - '0');
- if (exp > maxExp)
- RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, s.Tell());
- }
- }
- }
- else
- RAPIDJSON_PARSE_ERROR(kParseErrorNumberMissExponent, s.Tell());
-
- if (expMinus)
- exp = -exp;
- }
-
- // Finish parsing, call event according to the type of number.
- bool cont = true;
- 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);
-
- cont = handler.Double(minus ? -d : 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 (!cont)
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, s.Tell());
- }
-
- // 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 {
- IterativeParsingStartState = 0,
- IterativeParsingFinishState,
- IterativeParsingErrorState,
-
- // Object states
- IterativeParsingObjectInitialState,
- IterativeParsingMemberKeyState,
- IterativeParsingKeyValueDelimiterState,
- IterativeParsingMemberValueState,
- IterativeParsingMemberDelimiterState,
- IterativeParsingObjectFinishState,
-
- // Array states
- IterativeParsingArrayInitialState,
- IterativeParsingElementState,
- IterativeParsingElementDelimiterState,
- IterativeParsingArrayFinishState,
-
- // Single value state
- IterativeParsingValueState
- };
-
- enum { cIterativeParsingStateCount = IterativeParsingValueState + 1 };
-
- // Tokens
- enum Token {
- LeftBracketToken = 0,
- RightBracketToken,
-
- LeftCurlyBracketToken,
- RightCurlyBracketToken,
-
- CommaToken,
- ColonToken,
-
- StringToken,
- FalseToken,
- TrueToken,
- NullToken,
- NumberToken,
-
- kTokenCount
- };
-
- RAPIDJSON_FORCEINLINE Token Tokenize(Ch c) {
-
-//!@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) {
- // current state x one lookahead token -> new state
- static const char G[cIterativeParsingStateCount][kTokenCount] = {
- // 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
- },
- // 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
- },
- // 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
- },
- // 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
- },
- // 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
- },
- // MemberDelimiter
- {
- IterativeParsingErrorState, // Left bracket
- IterativeParsingErrorState, // Right bracket
- IterativeParsingErrorState, // Left curly bracket
- IterativeParsingErrorState, // Right curly bracket
- IterativeParsingErrorState, // Comma
- IterativeParsingErrorState, // Colon
- IterativeParsingMemberKeyState, // 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
- },
- // ElementDelimiter
- {
- IterativeParsingArrayInitialState, // Left bracket(push Element state)
- IterativeParsingErrorState, // 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
- },
- // 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
- }
- }; // 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:
- {
- // 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:
- {
- // 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 IterativeParsingElementState: RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell()); return;
- default: RAPIDJSON_PARSE_ERROR(kParseErrorUnspecificSyntaxError, is.Tell()); return;
- }
- }
-
- 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_;
-}; // class GenericReader
-
-//! Reader with UTF8 encoding and default allocator.
-typedef GenericReader<UTF8<>, UTF8<> > Reader;
-
-RAPIDJSON_NAMESPACE_END
-
-#ifdef __clang__
-RAPIDJSON_DIAG_POP
-#endif
-
-
-#ifdef __GNUC__
-RAPIDJSON_DIAG_POP
-#endif
-
-#ifdef _MSC_VER
-RAPIDJSON_DIAG_POP
-#endif
-
-#endif // RAPIDJSON_READER_H_
+// Tencent is pleased to support the open source community by making RapidJSON available.
+//
+// Copyright (C) 2015 THL A29 Limited, a Tencent company, and Milo Yip. All rights reserved.
+//
+// Licensed under the MIT License (the "License"); you may not use this file except
+// in compliance with the License. You may obtain a copy of the License at
+//
+// http://opensource.org/licenses/MIT
+//
+// Unless required by applicable law or agreed to in writing, software distributed
+// under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
+// CONDITIONS OF ANY KIND, either express or implied. See the License for the
+// specific language governing permissions and limitations under the License.
+
+#ifndef RAPIDJSON_READER_H_
+#define RAPIDJSON_READER_H_
+
+/*! \file reader.h */
+
+#include "allocators.h"
+#include "stream.h"
+#include "encodedstream.h"
+#include "internal/meta.h"
+#include "internal/stack.h"
+#include "internal/strtod.h"
+#include <limits>
+
+#if defined(RAPIDJSON_SIMD) && defined(_MSC_VER)
+#include <intrin.h>
+#pragma intrinsic(_BitScanForward)
+#endif
+#ifdef RAPIDJSON_SSE42
+#include <nmmintrin.h>
+#elif defined(RAPIDJSON_SSE2)
+#include <emmintrin.h>
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(4127) // conditional expression is constant
+RAPIDJSON_DIAG_OFF(4702) // unreachable code
+#endif
+
+#ifdef __clang__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(old-style-cast)
+RAPIDJSON_DIAG_OFF(padded)
+RAPIDJSON_DIAG_OFF(switch-enum)
+#endif
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_PUSH
+RAPIDJSON_DIAG_OFF(effc++)
+#endif
+
+//!@cond RAPIDJSON_HIDDEN_FROM_DOXYGEN
+#define RAPIDJSON_NOTHING /* deliberately empty */
+#ifndef RAPIDJSON_PARSE_ERROR_EARLY_RETURN
+#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN(value) \
+ RAPIDJSON_MULTILINEMACRO_BEGIN \
+ if (RAPIDJSON_UNLIKELY(HasParseError())) { return value; } \
+ RAPIDJSON_MULTILINEMACRO_END
+#endif
+#define RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID \
+ RAPIDJSON_PARSE_ERROR_EARLY_RETURN(RAPIDJSON_NOTHING)
+//!@endcond
+
+/*! \def RAPIDJSON_PARSE_ERROR_NORETURN
+ \ingroup RAPIDJSON_ERRORS
+ \brief Macro to indicate a parse error.
+ \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
+ \param offset position of the error in JSON input (\c size_t)
+
+ This macros can be used as a customization point for the internal
+ error handling mechanism of RapidJSON.
+
+ A common usage model is to throw an exception instead of requiring the
+ caller to explicitly check the \ref rapidjson::GenericReader::Parse's
+ return value:
+
+ \code
+ #define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode,offset) \
+ throw ParseException(parseErrorCode, #parseErrorCode, offset)
+
+ #include <stdexcept> // std::runtime_error
+ #include "rapidjson/error/error.h" // rapidjson::ParseResult
+
+ struct ParseException : std::runtime_error, rapidjson::ParseResult {
+ ParseException(rapidjson::ParseErrorCode code, const char* msg, size_t offset)
+ : std::runtime_error(msg), ParseResult(code, offset) {}
+ };
+
+ #include "rapidjson/reader.h"
+ \endcode
+
+ \see RAPIDJSON_PARSE_ERROR, rapidjson::GenericReader::Parse
+ */
+#ifndef RAPIDJSON_PARSE_ERROR_NORETURN
+#define RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset) \
+ RAPIDJSON_MULTILINEMACRO_BEGIN \
+ RAPIDJSON_ASSERT(!HasParseError()); /* Error can only be assigned once */ \
+ SetParseError(parseErrorCode, offset); \
+ RAPIDJSON_MULTILINEMACRO_END
+#endif
+
+/*! \def RAPIDJSON_PARSE_ERROR
+ \ingroup RAPIDJSON_ERRORS
+ \brief (Internal) macro to indicate and handle a parse error.
+ \param parseErrorCode \ref rapidjson::ParseErrorCode of the error
+ \param offset position of the error in JSON input (\c size_t)
+
+ Invokes RAPIDJSON_PARSE_ERROR_NORETURN and stops the parsing.
+
+ \see RAPIDJSON_PARSE_ERROR_NORETURN
+ \hideinitializer
+ */
+#ifndef RAPIDJSON_PARSE_ERROR
+#define RAPIDJSON_PARSE_ERROR(parseErrorCode, offset) \
+ RAPIDJSON_MULTILINEMACRO_BEGIN \
+ RAPIDJSON_PARSE_ERROR_NORETURN(parseErrorCode, offset); \
+ RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID; \
+ RAPIDJSON_MULTILINEMACRO_END
+#endif
+
+#include "error/error.h" // ParseErrorCode, ParseResult
+
+RAPIDJSON_NAMESPACE_BEGIN
+
+///////////////////////////////////////////////////////////////////////////////
+// ParseFlag
+
+/*! \def RAPIDJSON_PARSE_DEFAULT_FLAGS
+ \ingroup RAPIDJSON_CONFIG
+ \brief User-defined kParseDefaultFlags definition.
+
+ User can define this as any \c ParseFlag combinations.
+*/
+#ifndef RAPIDJSON_PARSE_DEFAULT_FLAGS
+#define RAPIDJSON_PARSE_DEFAULT_FLAGS kParseNoFlags
+#endif
+
+//! Combination of parseFlags
+/*! \see Reader::Parse, Document::Parse, Document::ParseInsitu, Document::ParseStream
+ */
+enum ParseFlag {
+ kParseNoFlags = 0, //!< No flags are set.
+ kParseInsituFlag = 1, //!< In-situ(destructive) parsing.
+ kParseValidateEncodingFlag = 2, //!< Validate encoding of JSON strings.
+ kParseIterativeFlag = 4, //!< Iterative(constant complexity in terms of function call stack size) parsing.
+ 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.
+ kParseFullPrecisionFlag = 16, //!< Parse number in full precision (but slower).
+ kParseCommentsFlag = 32, //!< Allow one-line (//) and multi-line (/**/) comments.
+ kParseNumbersAsStringsFlag = 64, //!< Parse all numbers (ints/doubles) as strings.
+ kParseTrailingCommasFlag = 128, //!< Allow trailing commas at the end of objects and arrays.
+ kParseNanAndInfFlag = 256, //!< Allow parsing NaN, Inf, Infinity, -Inf and -Infinity as doubles.
+ kParseDefaultFlags = RAPIDJSON_PARSE_DEFAULT_FLAGS //!< Default parse flags. Can be customized by defining RAPIDJSON_PARSE_DEFAULT_FLAGS
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// Handler
+
+/*! \class rapidjson::Handler
+ \brief Concept for receiving events from GenericReader upon parsing.
+ The functions return true if no error occurs. If they return false,
+ the event publisher should terminate the process.
+\code
+concept Handler {
+ typename Ch;
+
+ bool Null();
+ bool Bool(bool b);
+ bool Int(int i);
+ bool Uint(unsigned i);
+ bool Int64(int64_t i);
+ bool Uint64(uint64_t i);
+ bool Double(double d);
+ /// enabled via kParseNumbersAsStringsFlag, string is not null-terminated (use length)
+ bool RawNumber(const Ch* str, SizeType length, bool copy);
+ bool String(const Ch* str, SizeType length, bool copy);
+ bool StartObject();
+ bool Key(const Ch* str, SizeType length, bool copy);
+ bool EndObject(SizeType memberCount);
+ bool StartArray();
+ bool EndArray(SizeType elementCount);
+};
+\endcode
+*/
+///////////////////////////////////////////////////////////////////////////////
+// BaseReaderHandler
+
+//! Default implementation of Handler.
+/*! This can be used as base class of any reader handler.
+ \note implements Handler concept
+*/
+template<typename Encoding = UTF8<>, typename Derived = void>
+struct BaseReaderHandler {
+ typedef typename Encoding::Ch Ch;
+
+ typedef typename internal::SelectIf<internal::IsSame<Derived, void>, BaseReaderHandler, Derived>::Type Override;
+
+ bool Default() { return true; }
+ bool Null() { return static_cast<Override&>(*this).Default(); }
+ bool Bool(bool) { return static_cast<Override&>(*this).Default(); }
+ bool Int(int) { return static_cast<Override&>(*this).Default(); }
+ bool Uint(unsigned) { return static_cast<Override&>(*this).Default(); }
+ bool Int64(int64_t) { return static_cast<Override&>(*this).Default(); }
+ bool Uint64(uint64_t) { return static_cast<Override&>(*this).Default(); }
+ bool Double(double) { return static_cast<Override&>(*this).Default(); }
+ /// enabled via kParseNumbersAsStringsFlag, string is not null-terminated (use length)
+ bool RawNumber(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
+ bool String(const Ch*, SizeType, bool) { return static_cast<Override&>(*this).Default(); }
+ bool StartObject() { return static_cast<Override&>(*this).Default(); }
+ bool Key(const Ch* str, SizeType len, bool copy) { return static_cast<Override&>(*this).String(str, len, copy); }
+ bool EndObject(SizeType) { return static_cast<Override&>(*this).Default(); }
+ bool StartArray() { return static_cast<Override&>(*this).Default(); }
+ bool EndArray(SizeType) { return static_cast<Override&>(*this).Default(); }
+};
+
+///////////////////////////////////////////////////////////////////////////////
+// StreamLocalCopy
+
+namespace internal {
+
+template<typename Stream, int = StreamTraits<Stream>::copyOptimization>
+class StreamLocalCopy;
+
+//! Do copy optimization.
+template<typename Stream>
+class StreamLocalCopy<Stream, 1> {
+public:
+ StreamLocalCopy(Stream& original) : s(original), original_(original) {}
+ ~StreamLocalCopy() { original_ = s; }
+
+ Stream s;
+
+private:
+ StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
+
+ Stream& original_;
+};
+
+//! Keep reference.
+template<typename Stream>
+class StreamLocalCopy<Stream, 0> {
+public:
+ StreamLocalCopy(Stream& original) : s(original) {}
+
+ Stream& s;
+
+private:
+ StreamLocalCopy& operator=(const StreamLocalCopy&) /* = delete */;
+};
+
+} // namespace internal
+
+///////////////////////////////////////////////////////////////////////////////
+// SkipWhitespace
+
+//! Skip the JSON white spaces in a stream.
+/*! \param is A input stream for skipping white spaces.
+ \note This function has SSE2/SSE4.2 specialization.
+*/
+template<typename InputStream>
+void SkipWhitespace(InputStream& is) {
+ internal::StreamLocalCopy<InputStream> copy(is);
+ InputStream& s(copy.s);
+
+ typename InputStream::Ch c;
+ while ((c = s.Peek()) == ' ' || c == '\n' || c == '\r' || c == '\t')
+ s.Take();
+}
+
+inline const char* SkipWhitespace(const char* p, const char* end) {
+ while (p != end && (*p == ' ' || *p == '\n' || *p == '\r' || *p == '\t'))
+ ++p;
+ return p;
+}
+
+#ifdef RAPIDJSON_SSE42
+//! Skip whitespace with SSE 4.2 pcmpistrm instruction, 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;
+
+ // The rest of string using SIMD
+ static const char whitespace[16] = " \n\r\t";
+ const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
+
+ for (;; p += 16) {
+ const __m128i s = _mm_load_si128(reinterpret_cast<const __m128i *>(p));
+ const int r = _mm_cvtsi128_si32(_mm_cmpistrm(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_BIT_MASK | _SIDD_NEGATIVE_POLARITY));
+ if (r != 0) { // some of characters is 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 middle of string using SIMD
+ static const char whitespace[16] = " \n\r\t";
+ const __m128i w = _mm_loadu_si128(reinterpret_cast<const __m128i *>(&whitespace[0]));
+
+ for (; p <= end - 16; p += 16) {
+ const __m128i s = _mm_loadu_si128(reinterpret_cast<const __m128i *>(p));
+ const int r = _mm_cvtsi128_si32(_mm_cmpistrm(w, s, _SIDD_UBYTE_OPS | _SIDD_CMP_EQUAL_ANY | _SIDD_BIT_MASK | _SIDD_NEGATIVE_POLARITY));
+ if (r != 0) { // some of characters is 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_SSE2)
+
+//! Skip whitespace with SSE2 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;
+
+ // 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);
+}
+
+#endif // RAPIDJSON_SSE2
+
+#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_() {}
+
+ //! 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);
+ }
+
+ //! Whether a parse error has occured 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 hexidecimal 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 inital '\\' 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 (RAPIDJSON_LIKELY(e == 'u')) { // Unicode
+ is.Take();
+ unsigned codepoint = ParseHex4(is, escapeOffset);
+ RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
+ if (RAPIDJSON_UNLIKELY(codepoint >= 0xD800 && 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;
+ }
+ 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(kParseErrorStringEscapeInvalid, 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] = { 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19 };
+ 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, 0x19) == 0x19
+ 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
+ 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] = { 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19 };
+ 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, 0x19) == 0x19
+ 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] = { 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19, 0x19 };
+ 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, 0x19) == 0x19
+ 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;
+ }
+#endif
+
+ 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; }
+ ~NumberStream() {}
+
+ 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_) {}
+ ~NumberStream() {}
+
+ 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) {}
+ ~NumberStream() {}
+
+ 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'))) {
+ useNanOrInf = true;
+ if (RAPIDJSON_LIKELY(Consume(s, 'N') && Consume(s, 'a') && Consume(s, 'N'))) {
+ d = std::numeric_limits<double>::quiet_NaN();
+ }
+ else if (RAPIDJSON_LIKELY(Consume(s, 'I') && Consume(s, 'n') && Consume(s, 'f'))) {
+ d = (minus ? -std::numeric_limits<double>::infinity() : std::numeric_limits<double>::infinity());
+ 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());
+ }
+ else
+ 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')) {
+ if (RAPIDJSON_UNLIKELY(d >= 1.7976931348623157e307)) // DBL_MAX / 10.0
+ RAPIDJSON_PARSE_ERROR(kParseErrorNumberTooBig, startOffset);
+ 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) {
+ while (RAPIDJSON_LIKELY(s.Peek() >= '0' && s.Peek() <= '9')) {
+ exp = exp * 10 + static_cast<int>(s.Take() - '0');
+ if (exp >= 214748364) { // Issue #313: prevent overflow exponent
+ 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);
+
+ 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 {
+ IterativeParsingStartState = 0,
+ IterativeParsingFinishState,
+ IterativeParsingErrorState,
+
+ // Object states
+ IterativeParsingObjectInitialState,
+ IterativeParsingMemberKeyState,
+ IterativeParsingKeyValueDelimiterState,
+ IterativeParsingMemberValueState,
+ IterativeParsingMemberDelimiterState,
+ IterativeParsingObjectFinishState,
+
+ // Array states
+ IterativeParsingArrayInitialState,
+ IterativeParsingElementState,
+ IterativeParsingElementDelimiterState,
+ IterativeParsingArrayFinishState,
+
+ // Single value state
+ IterativeParsingValueState
+ };
+
+ enum { cIterativeParsingStateCount = IterativeParsingValueState + 1 };
+
+ // Tokens
+ enum Token {
+ LeftBracketToken = 0,
+ RightBracketToken,
+
+ LeftCurlyBracketToken,
+ RightCurlyBracketToken,
+
+ CommaToken,
+ ColonToken,
+
+ StringToken,
+ FalseToken,
+ TrueToken,
+ NullToken,
+ NumberToken,
+
+ kTokenCount
+ };
+
+ RAPIDJSON_FORCEINLINE Token Tokenize(Ch c) {
+
+//!@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) {
+ // current state x one lookahead token -> new state
+ static const char G[cIterativeParsingStateCount][kTokenCount] = {
+ // 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
+ },
+ // 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
+ },
+ // 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
+ },
+ // 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
+ },
+ // 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
+ },
+ // 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
+ },
+ // 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
+ },
+ // 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
+ },
+ // 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
+ }
+ }; // 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;
+ }
+ }
+
+ 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_;
+}; // class GenericReader
+
+//! Reader with UTF8 encoding and default allocator.
+typedef GenericReader<UTF8<>, UTF8<> > Reader;
+
+RAPIDJSON_NAMESPACE_END
+
+#ifdef __clang__
+RAPIDJSON_DIAG_POP
+#endif
+
+
+#ifdef __GNUC__
+RAPIDJSON_DIAG_POP
+#endif
+
+#ifdef _MSC_VER
+RAPIDJSON_DIAG_POP
+#endif
+
+#endif // RAPIDJSON_READER_H_
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