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rapidjson.patch
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From a370360015d8e2d34f0b543105de2b1716be1440 Mon Sep 17 00:00:00 2001
From: = <[email protected]>
Date: Thu, 21 May 2015 10:44:44 +0200
Subject: [PATCH] Reading single values in addition to objects and arrays
---
rapidjson/include/rapidjson/reader.h | 2899 ++++++++++++++++++++++----------------------
1 file changed, 1455 insertions(+), 1444 deletions(-)
diff --git a/rapidjson/include/rapidjson/reader.h b/rapidjson/include/rapidjson/reader.h
index 5f54581..2b41a49 100644
--- a/rapidjson/include/rapidjson/reader.h
+++ b/rapidjson/include/rapidjson/reader.h
@@ -1,1444 +1,1455 @@
-// Copyright (C) 2011 Milo Yip
-//
-// Permission is hereby granted, free of charge, to any person obtaining a copy
-// of this software and associated documentation files (the "Software"), to deal
-// in the Software without restriction, including without limitation the rights
-// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-// copies of the Software, and to permit persons to whom the Software is
-// furnished to do so, subject to the following conditions:
-//
-// The above copyright notice and this permission notice shall be included in
-// all copies or substantial portions of the Software.
-//
-// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-// THE SOFTWARE.
-
-#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 __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).
- 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) & ~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_load_si128((const __m128i *)&whitespace[0]);
-
- for (;; p += 16) {
- const __m128i s = _mm_load_si128((const __m128i *)p);
- const unsigned 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) & ~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((const __m128i *)&whitespaces[0][0]);
- const __m128i w1 = _mm_loadu_si128((const __m128i *)&whitespaces[1][0]);
- const __m128i w2 = _mm_loadu_si128((const __m128i *)&whitespaces[2][0]);
- const __m128i w3 = _mm_loadu_si128((const __m128i *)&whitespaces[3][0]);
-
- for (;; p += 16) {
- const __m128i s = _mm_load_si128((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 = (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);
-
- SkipWhitespace(is);
-
- 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)) {
- SkipWhitespace(is);
-
- 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&);
- };
-
- // 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());
-
- SkipWhitespace(is);
-
- 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;
-
- SkipWhitespace(is);
-
- if (is.Take() != ':')
- RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissColon, is.Tell());
-
- SkipWhitespace(is);
-
- ParseValue<parseFlags>(is, handler);
- RAPIDJSON_PARSE_ERROR_EARLY_RETURN_VOID;
-
- SkipWhitespace(is);
-
- ++memberCount;
-
- switch (is.Take()) {
- case ',': SkipWhitespace(is); break;
- case '}':
- if (!handler.EndObject(memberCount))
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- return;
- default: RAPIDJSON_PARSE_ERROR(kParseErrorObjectMissCommaOrCurlyBracket, is.Tell());
- }
- }
- }
-
- // 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());
-
- SkipWhitespace(is);
-
- 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;
- SkipWhitespace(is);
-
- switch (is.Take()) {
- case ',': SkipWhitespace(is); break;
- case ']':
- if (!handler.EndArray(elementCount))
- RAPIDJSON_PARSE_ERROR(kParseErrorTermination, is.Tell());
- return;
- default: RAPIDJSON_PARSE_ERROR(kParseErrorArrayMissCommaOrSquareBracket, is.Tell());
- }
- }
- }
-
- 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 = (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[(unsigned char)e]) {
- os.Put(escape[(unsigned char)e]);
- }
- else if (e == 'u') { // Unicode
- unsigned codepoint = ParseHex4(is);
- 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);
- 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 ((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((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 = (double)i64;
-#else
- // Use double to store significand in 32-bit architecture
- d = use64bit ? (double)i64 : (double)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 = s.Take() - '0';
- while (s.Peek() >= '0' && s.Peek() <= '9') {
- exp = exp * 10 + (s.Take() - '0');
- if (exp > 308 && !expMinus) // exp > 308 should be rare, so it should be checked first.
- 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(-(int64_t)i64);
- else
- cont = handler.Uint64(i64);
- }
- else {
- if (minus)
- cont = handler.Int(-(int)i);
- 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;