Fbson to Json

Summary: Replaced rapidjson with fbson

Test Plan:
make all check
make valgrind_check

Reviewers: golovachalexander, igor

Reviewed By: igor

Subscribers: dhruba

Differential Revision: https://reviews.facebook.net/D32733

include/rocksdb/utilities/json_document.h

@@ -5,15 +5,27 @@
 #pragma once
 #ifndef ROCKSDB_LITE
 
-#include <string>
+#include <deque>
 #include <map>
+#include <memory>
+#include <string>
 #include <unordered_map>
+#include <utility>
 #include <vector>
 
 #include "rocksdb/slice.h"
 
 // We use JSONDocument for DocumentDB API
-// Implementation inspired by folly::dynamic and rapidjson
+// Implementation inspired by folly::dynamic, rapidjson and fbson
+
+namespace fbson {
+  class FbsonValue;
+  class ObjectVal;
+  template <typename T>
+  class FbsonWriterT;
+  class FbsonOutStream;
+  typedef FbsonWriterT<FbsonOutStream> FbsonWriter;
+}  // namespace fbson
 
 namespace rocksdb {
 
@@ -33,52 +45,38 @@ class JSONDocument {
     kString,
   };
 
-  JSONDocument();  // null
+  /* implicit */ JSONDocument();  // null
   /* implicit */ JSONDocument(bool b);
   /* implicit */ JSONDocument(double d);
+  /* implicit */ JSONDocument(int8_t i);
+  /* implicit */ JSONDocument(int16_t i);
+  /* implicit */ JSONDocument(int32_t i);
   /* implicit */ JSONDocument(int64_t i);
   /* implicit */ JSONDocument(const std::string& s);
   /* implicit */ JSONDocument(const char* s);
   // constructs JSONDocument of specific type with default value
-  explicit JSONDocument(Type type);
+  explicit JSONDocument(Type _type);
 
-  // copy constructor
   JSONDocument(const JSONDocument& json_document);
 
-  ~JSONDocument();
+  JSONDocument(JSONDocument&& json_document);
 
   Type type() const;
 
   // REQUIRES: IsObject()
   bool Contains(const std::string& key) const;
-  // Returns nullptr if !Contains()
-  // don't delete the returned pointer
-  // REQUIRES: IsObject()
-  const JSONDocument* Get(const std::string& key) const;
-  // REQUIRES: IsObject()
-  JSONDocument& operator[](const std::string& key);
   // REQUIRES: IsObject()
-  const JSONDocument& operator[](const std::string& key) const;
-  // returns `this`, so you can chain operations.
-  // Copies value
-  // REQUIRES: IsObject()
-  JSONDocument* Set(const std::string& key, const JSONDocument& value);
+  // Returns non-owner object
+  JSONDocument operator[](const std::string& key) const;
 
   // REQUIRES: IsArray() == true || IsObject() == true
   size_t Count() const;
 
   // REQUIRES: IsArray()
-  const JSONDocument* GetFromArray(size_t i) const;
-  // REQUIRES: IsArray()
-  JSONDocument& operator[](size_t i);
-  // REQUIRES: IsArray()
-  const JSONDocument& operator[](size_t i) const;
-  // returns `this`, so you can chain operations.
-  // Copies the value
-  // REQUIRES: IsArray() && i < Count()
-  JSONDocument* SetInArray(size_t i, const JSONDocument& value);
-  // REQUIRES: IsArray()
-  JSONDocument* PushBack(const JSONDocument& value);
+  // Returns non-owner object
+  JSONDocument operator[](size_t i) const;
+
+  JSONDocument& operator=(JSONDocument jsonDocument);
 
   bool IsNull() const;
   bool IsArray() const;
@@ -95,10 +93,16 @@ class JSONDocument {
   // REQUIRES: IsInt64() == true
   int64_t GetInt64() const;
   // REQUIRES: IsString() == true
-  const std::string& GetString() const;
+  std::string GetString() const;
 
   bool operator==(const JSONDocument& rhs) const;
 
+  bool operator!=(const JSONDocument& rhs) const;
+
+  JSONDocument Copy() const;
+
+  bool IsOwner() const;
+
   std::string DebugString() const;
 
  private:
@@ -114,53 +118,42 @@ class JSONDocument {
   static JSONDocument* Deserialize(const Slice& src);
 
  private:
-  void SerializeInternal(std::string* dst, bool type_prefix) const;
-  // returns false if Slice doesn't represent valid serialized JSONDocument.
-  // Otherwise, true
-  bool DeserializeInternal(Slice* input);
+  friend class JSONDocumentBuilder;
 
-  typedef std::vector<JSONDocument*> Array;
-  typedef std::unordered_map<std::string, JSONDocument*> Object;
+  JSONDocument(fbson::FbsonValue* val, bool makeCopy);
+
+  void InitFromValue(const fbson::FbsonValue* val);
 
   // iteration on objects
   class const_item_iterator {
+   private:
+    class Impl;
    public:
-    typedef Object::const_iterator It;
-    typedef Object::value_type value_type;
-    /* implicit */ const_item_iterator(It it) : it_(it) {}
-    It& operator++() { return ++it_; }
-    bool operator!=(const const_item_iterator& other) {
-      return it_ != other.it_;
-    }
-    value_type operator*() { return *it_; }
-
+    typedef std::pair<std::string, JSONDocument> value_type;
+    /* implicit */ const_item_iterator(Impl* impl);
+    const_item_iterator(const_item_iterator&&);
+    const_item_iterator& operator++();
+    bool operator!=(const const_item_iterator& other);
+    value_type operator*();
+    ~const_item_iterator();
    private:
-    It it_;
+    friend class ItemsIteratorGenerator;
+    std::unique_ptr<Impl> it_;
   };
+
   class ItemsIteratorGenerator {
    public:
-    /* implicit */ ItemsIteratorGenerator(const Object& object)
-        : object_(object) {}
-    const_item_iterator begin() { return object_.begin(); }
-    const_item_iterator end() { return object_.end(); }
+    /* implicit */ ItemsIteratorGenerator(const fbson::ObjectVal& object);
+    const_item_iterator begin() const;
+
+    const_item_iterator end() const;
 
    private:
-    const Object& object_;
+    const fbson::ObjectVal& object_;
   };
 
-  union Data {
-    Data() : n(nullptr) {}
-    ~Data() {}
-
-    void* n;
-    Array a;
-    bool b;
-    double d;
-    int64_t i;
-    std::string s;
-    Object o;
-  } data_;
-  const Type type_;
+  std::unique_ptr<char[]> data_;
+  mutable fbson::FbsonValue* value_;
 
   // Our serialization format's first byte specifies the encoding version. That
   // way, we can easily change our format while providing backwards
@@ -169,6 +162,34 @@ class JSONDocument {
   static const char kSerializationFormatVersion;
 };
 
+class JSONDocumentBuilder {
+ public:
+  JSONDocumentBuilder();
+
+  explicit JSONDocumentBuilder(fbson::FbsonOutStream* out);
+
+  void Reset();
+
+  bool WriteStartArray();
+
+  bool WriteEndArray();
+
+  bool WriteStartObject();
+
+  bool WriteEndObject();
+
+  bool WriteKeyValue(const std::string& key, const JSONDocument& value);
+
+  bool WriteJSONDocument(const JSONDocument& value);
+
+  JSONDocument GetJSONDocument();
+
+  ~JSONDocumentBuilder();
+
+ private:
+  std::unique_ptr<fbson::FbsonWriter> writer_;
+};
+
 }  // namespace rocksdb
 
 #endif  // ROCKSDB_LITE

linters/lint_engine/FacebookFbcodeLintEngine.php

@@ -87,7 +87,8 @@ class FacebookFbcodeLintEngine extends ArcanistLintEngine {
         $spelling_linter->addPath($path);
         $spelling_linter->addData($path, $this->loadData($path));
       }
-      if (preg_match('/\.(cpp|c|cc|cxx|h|hh|hpp|hxx|tcc)$/', $path)) {
+      if (preg_match('/\.(cpp|c|cc|cxx|h|hh|hpp|hxx|tcc)$/', $path)
+          && !preg_match('/third-party/', $path)) {
         foreach ($cpp_linters as &$linter) {
           $linter->addPath($path);
           $linter->addData($path, $this->loadData($path));

third-party/fbson/FbsonJsonParser.h

+/*
+ *  Copyright (c) 2014, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+/*
+ * This file defines FbsonJsonParserT (template) and FbsonJsonParser.
+ *
+ * FbsonJsonParserT is a template class which implements a JSON parser.
+ * FbsonJsonParserT parses JSON text, and serialize it to FBSON binary format
+ * by using FbsonWriterT object. By default, FbsonJsonParserT creates a new
+ * FbsonWriterT object with an output stream object.  However, you can also
+ * pass in your FbsonWriterT or any stream object that implements some basic
+ * interface of std::ostream (see FbsonStream.h).
+ *
+ * FbsonJsonParser specializes FbsonJsonParserT with FbsonOutStream type (see
+ * FbsonStream.h). So unless you want to provide own a different output stream
+ * type, use FbsonJsonParser object.
+ *
+ * ** Parsing JSON **
+ * FbsonJsonParserT parses JSON string, and directly serializes into FBSON
+ * packed bytes. There are three ways to parse a JSON string: (1) using
+ * c-string, (2) using string with len, (3) using std::istream object. You can
+ * use custome streambuf to redirect output. FbsonOutBuffer is a streambuf used
+ * internally if the input is raw character buffer.
+ *
+ * You can reuse an FbsonJsonParserT object to parse/serialize multiple JSON
+ * strings, and the previous FBSON will be overwritten.
+ *
+ * If parsing fails (returned false), the error code will be set to one of
+ * FbsonErrType, and can be retrieved by calling getErrorCode().
+ *
+ * ** External dictionary **
+ * During parsing a JSON string, you can pass a call-back function to map a key
+ * string to an id, and store the dictionary id in FBSON to save space. The
+ * purpose of using an external dictionary is more towards a collection of
+ * documents (which has common keys) rather than a single document, so that
+ * space saving will be siginificant.
+ *
+ * ** Endianness **
+ * Note: FBSON serialization doesn't assume endianness of the server. However
+ * you will need to ensure that the endianness at the reader side is the same
+ * as that at the writer side (if they are on different machines). Otherwise,
+ * proper conversion is needed when a number value is returned to the
+ * caller/writer.
+ *
+ * @author Tian Xia <tianx@fb.com>
+ */
+
+#ifndef FBSON_FBSONPARSER_H
+#define FBSON_FBSONPARSER_H
+
+#ifndef ROCKSDB_LITE
+
+#include <cmath>
+#include "FbsonDocument.h"
+#include "FbsonWriter.h"
+
+namespace fbson {
+
+const char *const kJsonDelim = " ,]}\t\r\n";
+const char *const kWhiteSpace = " \t\n\r";
+
+/*
+ * Error codes
+ */
+enum class FbsonErrType {
+  E_NONE = 0,
+  E_INVALID_VER,
+  E_EMPTY_STR,
+  E_OUTPUT_FAIL,
+  E_INVALID_DOCU,
+  E_INVALID_VALUE,
+  E_INVALID_KEY,
+  E_INVALID_STR,
+  E_INVALID_OBJ,
+  E_INVALID_ARR,
+  E_INVALID_HEX,
+  E_INVALID_OCTAL,
+  E_INVALID_DECIMAL,
+  E_INVALID_EXPONENT,
+  E_HEX_OVERFLOW,
+  E_OCTAL_OVERFLOW,
+  E_DECIMAL_OVERFLOW,
+  E_DOUBLE_OVERFLOW,
+  E_EXPONENT_OVERFLOW,
+};
+
+/*
+ * Template FbsonJsonParserT
+ */
+template <class OS_TYPE>
+class FbsonJsonParserT {
+ public:
+  FbsonJsonParserT() : err_(FbsonErrType::E_NONE) {}
+
+  explicit FbsonJsonParserT(OS_TYPE &os)
+      : writer_(os), err_(FbsonErrType::E_NONE) {}
+
+  // parse a UTF-8 JSON string
+  bool parse(const std::string &str, hDictInsert handler = nullptr) {
+    return parse(str.c_str(), str.size(), handler);
+  }
+
+  // parse a UTF-8 JSON c-style string (NULL terminated)
+  bool parse(const char *c_str, hDictInsert handler = nullptr) {
+    return parse(c_str, strlen(c_str), handler);
+  }
+
+  // parse a UTF-8 JSON string with length
+  bool parse(const char *pch, uint32_t len, hDictInsert handler = nullptr) {
+    if (!pch || len == 0) {
+      err_ = FbsonErrType::E_EMPTY_STR;
+      return false;
+    }
+
+    FbsonInBuffer sb(pch, len);
+    std::istream in(&sb);
+    return parse(in, handler);
+  }
+
+  // parse UTF-8 JSON text from an input stream
+  bool parse(std::istream &in, hDictInsert handler = nullptr) {
+    bool res = false;
+
+    // reset output stream
+    writer_.reset();
+
+    trim(in);
+
+    if (in.peek() == '{') {
+      in.ignore();
+      res = parseObject(in, handler);
+    } else if (in.peek() == '[') {
+      in.ignore();
+      res = parseArray(in, handler);
+    } else {
+      err_ = FbsonErrType::E_INVALID_DOCU;
+    }
+
+    trim(in);
+    if (res && !in.eof()) {
+      err_ = FbsonErrType::E_INVALID_DOCU;
+      return false;
+    }
+
+    return res;
+  }
+
+  FbsonWriterT<OS_TYPE> &getWriter() { return writer_; }
+
+  FbsonErrType getErrorCode() { return err_; }
+
+  // clear error code
+  void clearErr() { err_ = FbsonErrType::E_NONE; }
+
+ private:
+  // parse a JSON object (comma-separated list of key-value pairs)
+  bool parseObject(std::istream &in, hDictInsert handler) {
+    if (!writer_.writeStartObject()) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    trim(in);
+
+    if (in.peek() == '}') {
+      in.ignore();
+      // empty object
+      if (!writer_.writeEndObject()) {
+        err_ = FbsonErrType::E_OUTPUT_FAIL;
+        return false;
+      }
+      return true;
+    }
+
+    while (in.good()) {
+      if (in.get() != '"') {
+        err_ = FbsonErrType::E_INVALID_KEY;
+        return false;
+      }
+
+      if (!parseKVPair(in, handler)) {
+        return false;
+      }
+
+      trim(in);
+
+      char ch = in.get();
+      if (ch == '}') {
+        // end of the object
+        if (!writer_.writeEndObject()) {
+          err_ = FbsonErrType::E_OUTPUT_FAIL;
+          return false;
+        }
+        return true;
+      } else if (ch != ',') {
+        err_ = FbsonErrType::E_INVALID_OBJ;
+        return false;
+      }
+
+      trim(in);
+    }
+
+    err_ = FbsonErrType::E_INVALID_OBJ;
+    return false;
+  }
+
+  // parse a JSON array (comma-separated list of values)
+  bool parseArray(std::istream &in, hDictInsert handler) {
+    if (!writer_.writeStartArray()) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    trim(in);
+
+    if (in.peek() == ']') {
+      in.ignore();
+      // empty array
+      if (!writer_.writeEndArray()) {
+        err_ = FbsonErrType::E_OUTPUT_FAIL;
+        return false;
+      }
+      return true;
+    }
+
+    while (in.good()) {
+      if (!parseValue(in, handler)) {
+        return false;
+      }
+
+      trim(in);
+
+      char ch = in.get();
+      if (ch == ']') {
+        // end of the array
+        if (!writer_.writeEndArray()) {
+          err_ = FbsonErrType::E_OUTPUT_FAIL;
+          return false;
+        }
+        return true;
+      } else if (ch != ',') {
+        err_ = FbsonErrType::E_INVALID_ARR;
+        return false;
+      }
+
+      trim(in);
+    }
+
+    err_ = FbsonErrType::E_INVALID_ARR;
+    return false;
+  }
+
+  // parse a key-value pair, separated by ":"
+  bool parseKVPair(std::istream &in, hDictInsert handler) {
+    if (parseKey(in, handler) && parseValue(in, handler)) {
+      return true;
+    }
+
+    return false;
+  }
+
+  // parse a key (must be string)
+  bool parseKey(std::istream &in, hDictInsert handler) {
+    char key[FbsonKeyValue::sMaxKeyLen];
+    int i = 0;
+    while (in.good() && in.peek() != '"' && i < FbsonKeyValue::sMaxKeyLen) {
+      key[i++] = in.get();
+    }
+
+    if (!in.good() || in.peek() != '"' || i == 0) {
+      err_ = FbsonErrType::E_INVALID_KEY;
+      return false;
+    }
+
+    in.ignore(); // discard '"'
+
+    int key_id = -1;
+    if (handler) {
+      key_id = handler(key, i);
+    }
+
+    if (key_id < 0) {
+      writer_.writeKey(key, i);
+    } else {
+      writer_.writeKey(key_id);
+    }
+
+    trim(in);
+
+    if (in.get() != ':') {
+      err_ = FbsonErrType::E_INVALID_OBJ;
+      return false;
+    }
+
+    return true;
+  }
+
+  // parse a value
+  bool parseValue(std::istream &in, hDictInsert handler) {
+    bool res = false;
+
+    trim(in);
+
+    switch (in.peek()) {
+    case 'N':
+    case 'n': {
+      in.ignore();
+      res = parseNull(in);
+      break;
+    }
+    case 'T':
+    case 't': {
+      in.ignore();
+      res = parseTrue(in);
+      break;
+    }
+    case 'F':
+    case 'f': {
+      in.ignore();
+      res = parseFalse(in);
+      break;
+    }
+    case '"': {
+      in.ignore();
+      res = parseString(in);
+      break;
+    }
+    case '{': {
+      in.ignore();
+      res = parseObject(in, handler);
+      break;
+    }
+    case '[': {
+      in.ignore();
+      res = parseArray(in, handler);
+      break;
+    }
+    default: {
+      res = parseNumber(in);
+      break;
+    }
+    }
+
+    return res;
+  }
+
+  // parse NULL value
+  bool parseNull(std::istream &in) {
+    if (tolower(in.get()) == 'u' && tolower(in.get()) == 'l' &&
+        tolower(in.get()) == 'l') {
+      writer_.writeNull();
+      return true;
+    }
+
+    err_ = FbsonErrType::E_INVALID_VALUE;
+    return false;
+  }
+
+  // parse TRUE value
+  bool parseTrue(std::istream &in) {
+    if (tolower(in.get()) == 'r' && tolower(in.get()) == 'u' &&
+        tolower(in.get()) == 'e') {
+      writer_.writeBool(true);
+      return true;
+    }
+
+    err_ = FbsonErrType::E_INVALID_VALUE;
+    return false;
+  }
+
+  // parse FALSE value
+  bool parseFalse(std::istream &in) {
+    if (tolower(in.get()) == 'a' && tolower(in.get()) == 'l' &&
+        tolower(in.get()) == 's' && tolower(in.get()) == 'e') {
+      writer_.writeBool(false);
+      return true;
+    }
+
+    err_ = FbsonErrType::E_INVALID_VALUE;
+    return false;
+  }
+
+  // parse a string
+  bool parseString(std::istream &in) {
+    if (!writer_.writeStartString()) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    bool escaped = false;
+    char buffer[4096]; // write 4KB at a time
+    int nread = 0;
+    while (in.good()) {
+      char ch = in.get();
+      if (ch != '"' || escaped) {
+        buffer[nread++] = ch;
+        if (nread == 4096) {
+          // flush buffer
+          if (!writer_.writeString(buffer, nread)) {
+            err_ = FbsonErrType::E_OUTPUT_FAIL;
+            return false;
+          }
+          nread = 0;
+        }
+        // set/reset escape
+        if (ch == '\\' || escaped) {
+          escaped = !escaped;
+        }
+      } else {
+        // write all remaining bytes in the buffer
+        if (nread > 0) {
+          if (!writer_.writeString(buffer, nread)) {
+            err_ = FbsonErrType::E_OUTPUT_FAIL;
+            return false;
+          }
+        }
+        // end writing string
+        if (!writer_.writeEndString()) {
+          err_ = FbsonErrType::E_OUTPUT_FAIL;
+          return false;
+        }
+        return true;
+      }
+    }
+
+    err_ = FbsonErrType::E_INVALID_STR;
+    return false;
+  }
+
+  // parse a number
+  // Number format can be hex, octal, or decimal (including float).
+  // Only decimal can have (+/-) sign prefix.
+  bool parseNumber(std::istream &in) {
+    bool ret = false;
+    switch (in.peek()) {
+    case '0': {
+      in.ignore();
+
+      if (in.peek() == 'x' || in.peek() == 'X') {
+        in.ignore();
+        ret = parseHex(in);
+      } else if (in.peek() == '.') {
+        in.ignore();
+        ret = parseDouble(in, 0, 0, 1);
+      } else {
+        ret = parseOctal(in);
+      }
+
+      break;
+    }
+    case '-': {
+      in.ignore();
+      ret = parseDecimal(in, -1);
+      break;
+    }
+    case '+':
+      in.ignore();
+    // fall through
+    default:
+      ret = parseDecimal(in, 1);
+      break;
+    }
+
+    return ret;
+  }
+
+  // parse a number in hex format
+  bool parseHex(std::istream &in) {
+    uint64_t val = 0;
+    int num_digits = 0;
+    char ch = tolower(in.peek());
+    while (in.good() && !strchr(kJsonDelim, ch) && (++num_digits) <= 16) {
+      if (ch >= '0' && ch <= '9') {
+        val = (val << 4) + (ch - '0');
+      } else if (ch >= 'a' && ch <= 'f') {
+        val = (val << 4) + (ch - 'a' + 10);
+      } else { // unrecognized hex digit
+        err_ = FbsonErrType::E_INVALID_HEX;
+        return false;
+      }
+
+      in.ignore();
+      ch = tolower(in.peek());
+    }
+
+    int size = 0;
+    if (num_digits <= 2) {
+      size = writer_.writeInt8(val);
+    } else if (num_digits <= 4) {
+      size = writer_.writeInt16(val);
+    } else if (num_digits <= 8) {
+      size = writer_.writeInt32(val);
+    } else if (num_digits <= 16) {
+      size = writer_.writeInt64(val);
+    } else {
+      err_ = FbsonErrType::E_HEX_OVERFLOW;
+      return false;
+    }
+
+    if (size == 0) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    return true;
+  }
+
+  // parse a number in octal format
+  bool parseOctal(std::istream &in) {
+    int64_t val = 0;
+    char ch = in.peek();
+    while (in.good() && !strchr(kJsonDelim, ch)) {
+      if (ch >= '0' && ch <= '7') {
+        val = val * 8 + (ch - '0');
+      } else {
+        err_ = FbsonErrType::E_INVALID_OCTAL;
+        return false;
+      }
+
+      // check if the number overflows
+      if (val < 0) {
+        err_ = FbsonErrType::E_OCTAL_OVERFLOW;
+        return false;
+      }
+
+      in.ignore();
+      ch = in.peek();
+    }
+
+    int size = 0;
+    if (val <= std::numeric_limits<int8_t>::max()) {
+      size = writer_.writeInt8(val);
+    } else if (val <= std::numeric_limits<int16_t>::max()) {
+      size = writer_.writeInt16(val);
+    } else if (val <= std::numeric_limits<int32_t>::max()) {
+      size = writer_.writeInt32(val);
+    } else { // val <= INT64_MAX
+      size = writer_.writeInt64(val);
+    }
+
+    if (size == 0) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    return true;
+  }
+
+  // parse a number in decimal (including float)
+  bool parseDecimal(std::istream &in, int sign) {
+    int64_t val = 0;
+    int precision = 0;
+
+    char ch = 0;
+    while (in.good() && (ch = in.peek()) == '0')
+      in.ignore();
+
+    while (in.good() && !strchr(kJsonDelim, ch)) {
+      if (ch >= '0' && ch <= '9') {
+        val = val * 10 + (ch - '0');
+        ++precision;
+      } else if (ch == '.') {
+        // note we don't pop out '.'
+        return parseDouble(in, val, precision, sign);
+      } else {
+        err_ = FbsonErrType::E_INVALID_DECIMAL;
+        return false;
+      }
+
+      in.ignore();
+
+      // if the number overflows int64_t, first parse it as double iff we see a
+      // decimal point later. Otherwise, will treat it as overflow
+      if (val < 0 && val > std::numeric_limits<int64_t>::min()) {
+        return parseDouble(in, (uint64_t)val, precision, sign);
+      }
+
+      ch = in.peek();
+    }
+
+    if (sign < 0) {
+      val = -val;
+    }
+
+    int size = 0;
+    if (val >= std::numeric_limits<int8_t>::min() &&
+        val <= std::numeric_limits<int8_t>::max()) {
+      size = writer_.writeInt8(val);
+    } else if (val >= std::numeric_limits<int16_t>::min() &&
+               val <= std::numeric_limits<int16_t>::max()) {
+      size = writer_.writeInt16(val);
+    } else if (val >= std::numeric_limits<int32_t>::min() &&
+               val <= std::numeric_limits<int32_t>::max()) {
+      size = writer_.writeInt32(val);
+    } else { // val <= INT64_MAX
+      size = writer_.writeInt64(val);
+    }
+
+    if (size == 0) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    return true;
+  }
+
+  // parse IEEE745 double precision:
+  // Significand precision length - 15
+  // Maximum exponent value - 308
+  //
+  // "If a decimal string with at most 15 significant digits is converted to
+  // IEEE 754 double precision representation and then converted back to a
+  // string with the same number of significant digits, then the final string
+  // should match the original"
+  bool parseDouble(std::istream &in, double val, int precision, int sign) {
+    int integ = precision;
+    int frac = 0;
+    bool is_frac = false;
+
+    char ch = in.peek();
+    if (ch == '.') {
+      is_frac = true;
+      in.ignore();
+      ch = in.peek();
+    }
+
+    int exp = 0;
+    while (in.good() && !strchr(kJsonDelim, ch)) {
+      if (ch >= '0' && ch <= '9') {
+        if (precision < 15) {
+          val = val * 10 + (ch - '0');
+          if (is_frac) {
+            ++frac;
+          } else {
+            ++integ;
+          }
+          ++precision;
+        } else if (!is_frac) {
+          ++exp;
+        }
+      } else if (ch == 'e' || ch == 'E') {
+        in.ignore();
+        int exp2;
+        if (!parseExponent(in, exp2)) {
+          return false;
+        }
+
+        exp += exp2;
+        // check if exponent overflows
+        if (exp > 308 || exp < -308) {
+          err_ = FbsonErrType::E_EXPONENT_OVERFLOW;
+          return false;
+        }
+
+        is_frac = true;
+        break;
+      }
+
+      in.ignore();
+      ch = in.peek();
+    }
+
+    if (!is_frac) {
+      err_ = FbsonErrType::E_DECIMAL_OVERFLOW;
+      return false;
+    }
+
+    val *= std::pow(10, exp - frac);
+    if (std::isnan(val) || std::isinf(val)) {
+      err_ = FbsonErrType::E_DOUBLE_OVERFLOW;
+      return false;
+    }
+
+    if (sign < 0) {
+      val = -val;
+    }
+
+    if (writer_.writeDouble(val) == 0) {
+      err_ = FbsonErrType::E_OUTPUT_FAIL;
+      return false;
+    }
+
+    return true;
+  }
+
+  // parse the exponent part of a double number
+  bool parseExponent(std::istream &in, int &exp) {
+    bool neg = false;
+
+    char ch = in.peek();
+    if (ch == '+') {
+      in.ignore();
+      ch = in.peek();
+    } else if (ch == '-') {
+      neg = true;
+      in.ignore();
+      ch = in.peek();
+    }
+
+    exp = 0;
+    while (in.good() && !strchr(kJsonDelim, ch)) {
+      if (ch >= '0' && ch <= '9') {
+        exp = exp * 10 + (ch - '0');
+      } else {
+        err_ = FbsonErrType::E_INVALID_EXPONENT;
+        return false;
+      }
+
+      if (exp > 308) {
+        err_ = FbsonErrType::E_EXPONENT_OVERFLOW;
+        return false;
+      }
+
+      in.ignore();
+      ch = in.peek();
+    }
+
+    if (neg) {
+      exp = -exp;
+    }
+
+    return true;
+  }
+
+  void trim(std::istream &in) {
+    while (in.good() && strchr(kWhiteSpace, in.peek())) {
+      in.ignore();
+    }
+  }
+
+ private:
+  FbsonWriterT<OS_TYPE> writer_;
+  FbsonErrType err_;
+};
+
+typedef FbsonJsonParserT<FbsonOutStream> FbsonJsonParser;
+
+} // namespace fbson
+
+#endif  // ROCKSDB_LITE
+#endif // FBSON_FBSONPARSER_H

third-party/fbson/FbsonStream.h

+/*
+ *  Copyright (c) 2014, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+/*
+ * This header file defines FbsonInBuffer and FbsonOutStream classes.
+ *
+ * ** Input Buffer **
+ * FbsonInBuffer is a customer input buffer to wrap raw character buffer. Its
+ * object instances are used to create std::istream objects interally.
+ *
+ * ** Output Stream **
+ * FbsonOutStream is a custom output stream classes, to contain the FBSON
+ * serialized binary. The class is conveniently used to specialize templates of
+ * FbsonParser and FbsonWriter.
+ *
+ * @author Tian Xia <tianx@fb.com>
+ */
+
+#ifndef FBSON_FBSONSTREAM_H
+#define FBSON_FBSONSTREAM_H
+
+#ifndef ROCKSDB_LITE
+
+#include <iostream>
+
+namespace fbson {
+
+// lengths includes sign
+#define MAX_INT_DIGITS 11
+#define MAX_INT64_DIGITS 20
+#define MAX_DOUBLE_DIGITS 23 // 1(sign)+16(significant)+1(decimal)+5(exponent)
+
+/*
+ * FBSON's implementation of input buffer
+ */
+class FbsonInBuffer : public std::streambuf {
+ public:
+  FbsonInBuffer(const char *str, uint32_t len) {
+    // this is read buffer and the str will not be changed
+    // so we use const_cast (ugly!) to remove constness
+    char *pch(const_cast<char *>(str));
+    setg(pch, pch, pch + len);
+  }
+};
+
+/*
+ * FBSON's implementation of output stream.
+ *
+ * This is a wrapper of a char buffer. By default, the buffer capacity is 1024
+ * bytes. We will double the buffer if realloc is needed for writes.
+ */
+class FbsonOutStream : public std::ostream {
+ public:
+  explicit FbsonOutStream(uint32_t capacity = 1024)
+      : head_(nullptr), size_(0), capacity_(capacity), alloc_(true) {
+    if (capacity_ == 0) {
+      capacity_ = 1024;
+    }
+
+    head_ = (char *)malloc(capacity_);
+  }
+
+  FbsonOutStream(char *buffer, uint32_t capacity)
+      : head_(buffer), size_(0), capacity_(capacity), alloc_(false) {
+    assert(buffer && capacity_ > 0);
+  }
+
+  ~FbsonOutStream() {
+    if (alloc_) {
+      free(head_);
+    }
+  }
+
+  void put(char c) { write(&c, 1); }
+
+  void write(const char *c_str) { write(c_str, strlen(c_str)); }
+
+  void write(const char *bytes, uint32_t len) {
+    if (len == 0)
+      return;
+
+    if (size_ + len > capacity_) {
+      realloc(len);
+    }
+
+    memcpy(head_ + size_, bytes, len);
+    size_ += len;
+  }
+
+  // write the integer to string
+  void write(int i) {
+    // snprintf automatically adds a NULL, so we need one more char
+    if (size_ + MAX_INT_DIGITS + 1 > capacity_) {
+      realloc(MAX_INT_DIGITS + 1);
+    }
+
+    int len = snprintf(head_ + size_, MAX_INT_DIGITS + 1, "%d", i);
+    assert(len > 0);
+    size_ += len;
+  }
+
+  // write the 64bit integer to string
+  void write(int64_t l) {
+    // snprintf automatically adds a NULL, so we need one more char
+    if (size_ + MAX_INT64_DIGITS + 1 > capacity_) {
+      realloc(MAX_INT64_DIGITS + 1);
+    }
+
+    int len = snprintf(head_ + size_, MAX_INT64_DIGITS + 1, "%ld", l);
+    assert(len > 0);
+    size_ += len;
+  }
+
+  // write the double to string
+  void write(double d) {
+    // snprintf automatically adds a NULL, so we need one more char
+    if (size_ + MAX_DOUBLE_DIGITS + 1 > capacity_) {
+      realloc(MAX_DOUBLE_DIGITS + 1);
+    }
+
+    int len = snprintf(head_ + size_, MAX_DOUBLE_DIGITS + 1, "%.15g", d);
+    assert(len > 0);
+    size_ += len;
+  }
+
+  pos_type tellp() const { return size_; }
+
+  void seekp(pos_type pos) { size_ = pos; }
+
+  const char *getBuffer() const { return head_; }
+
+  pos_type getSize() const { return tellp(); }
+
+ private:
+  void realloc(uint32_t len) {
+    assert(capacity_ > 0);
+
+    capacity_ *= 2;
+    while (capacity_ < size_ + len) {
+      capacity_ *= 2;
+    }
+
+    if (alloc_) {
+      char *new_buf = (char *)::realloc(head_, capacity_);
+      assert(new_buf);
+      head_ = new_buf;
+    } else {
+      char *new_buf = (char *)::malloc(capacity_);
+      assert(new_buf);
+      memcpy(new_buf, head_, size_);
+      head_ = new_buf;
+      alloc_ = true;
+    }
+  }
+
+ private:
+  char *head_;
+  uint32_t size_;
+  uint32_t capacity_;
+  bool alloc_;
+};
+
+} // namespace fbson
+
+#endif  // ROCKSDB_LITE
+#endif // FBSON_FBSONSTREAM_H

third-party/fbson/FbsonUtil.h

+/*
+ *  Copyright (c) 2014, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+/*
+ * This header file defines miscellaneous utility classes.
+ *
+ * @author Tian Xia <tianx@fb.com>
+ */
+
+#ifndef FBSON_FBSONUTIL_H
+#define FBSON_FBSONUTIL_H
+
+#ifndef ROCKSDB_LITE
+
+#include <sstream>
+#include "FbsonDocument.h"
+
+namespace fbson {
+
+#define OUT_BUF_SIZE 1024
+
+/*
+ * FbsonToJson converts an FbsonValue object to a JSON string.
+ */
+class FbsonToJson {
+ public:
+  FbsonToJson() : os_(buffer_, OUT_BUF_SIZE) {}
+
+  // get json string
+  const char *json(const FbsonValue *pval) {
+    os_.clear();
+    os_.seekp(0);
+
+    if (pval) {
+      intern_json(pval);
+    }
+
+    os_.put(0);
+    return os_.getBuffer();
+  }
+
+ private:
+  // recursively convert FbsonValue
+  void intern_json(const FbsonValue *val) {
+    switch (val->type()) {
+    case FbsonType::T_Null: {
+      os_.write("null", 4);
+      break;
+    }
+    case FbsonType::T_True: {
+      os_.write("true", 4);
+      break;
+    }
+    case FbsonType::T_False: {
+      os_.write("false", 5);
+      break;
+    }
+    case FbsonType::T_Int8: {
+      os_.write(((Int8Val *)val)->val());
+      break;
+    }
+    case FbsonType::T_Int16: {
+      os_.write(((Int16Val *)val)->val());
+      break;
+    }
+    case FbsonType::T_Int32: {
+      os_.write(((Int32Val *)val)->val());
+      break;
+    }
+    case FbsonType::T_Int64: {
+      os_.write(((Int64Val *)val)->val());
+      break;
+    }
+    case FbsonType::T_Double: {
+      os_.write(((DoubleVal *)val)->val());
+      break;
+    }
+    case FbsonType::T_String: {
+      os_.put('"');
+      os_.write(((StringVal *)val)->getBlob(),
+                ((StringVal *)val)->getBlobLen());
+      os_.put('"');
+      break;
+    }
+    case FbsonType::T_Binary: {
+      os_.write("\"<BINARY>", 9);
+      os_.write(((BinaryVal *)val)->getBlob(),
+                ((BinaryVal *)val)->getBlobLen());
+      os_.write("<BINARY>\"", 9);
+      break;
+    }
+    case FbsonType::T_Object: {
+      object_to_json((ObjectVal *)val);
+      break;
+    }
+    case FbsonType::T_Array: {
+      array_to_json((ArrayVal *)val);
+      break;
+    }
+    default:
+      break;
+    }
+  }
+
+  // convert object
+  void object_to_json(const ObjectVal *val) {
+    os_.put('{');
+
+    auto iter = val->begin();
+    auto iter_fence = val->end();
+
+    while (iter < iter_fence) {
+      // write key
+      if (iter->klen()) {
+        os_.put('"');
+        os_.write(iter->getKeyStr(), iter->klen());
+        os_.put('"');
+      } else {
+        os_.write(iter->getKeyId());
+      }
+      os_.put(':');
+
+      // convert value
+      intern_json(iter->value());
+
+      ++iter;
+      if (iter != iter_fence) {
+        os_.put(',');
+      }
+    }
+
+    assert(iter == iter_fence);
+
+    os_.put('}');
+  }
+
+  // convert array to json
+  void array_to_json(const ArrayVal *val) {
+    os_.put('[');
+
+    auto iter = val->begin();
+    auto iter_fence = val->end();
+
+    while (iter != iter_fence) {
+      // convert value
+      intern_json((const FbsonValue *)iter);
+      ++iter;
+      if (iter != iter_fence) {
+        os_.put(',');
+      }
+    }
+
+    assert(iter == iter_fence);
+
+    os_.put(']');
+  }
+
+ private:
+  FbsonOutStream os_;
+  char buffer_[OUT_BUF_SIZE];
+};
+
+} // namespace fbson
+
+#endif  // ROCKSDB_LITE
+#endif // FBSON_FBSONUTIL_H

third-party/fbson/FbsonWriter.h

+/*
+ *  Copyright (c) 2014, Facebook, Inc.
+ *  All rights reserved.
+ *
+ *  This source code is licensed under the BSD-style license found in the
+ *  LICENSE file in the root directory of this source tree. An additional grant
+ *  of patent rights can be found in the PATENTS file in the same directory.
+ *
+ */
+
+/*
+ * This file defines FbsonWriterT (template) and FbsonWriter.
+ *
+ * FbsonWriterT is a template class which implements an FBSON serializer.
+ * Users call various write functions of FbsonWriterT object to write values
+ * directly to FBSON packed bytes. All write functions of value or key return
+ * the number of bytes written to FBSON, or 0 if there is an error. To write an
+ * object, an array, or a string, you must call writeStart[..] before writing
+ * values or key, and call writeEnd[..] after finishing at the end.
+ *
+ * By default, an FbsonWriterT object creates an output stream buffer.
+ * Alternatively, you can also pass any output stream object to a writer, as
+ * long as the stream object implements some basic functions of std::ostream
+ * (such as FbsonOutStream, see FbsonStream.h).
+ *
+ * FbsonWriter specializes FbsonWriterT with FbsonOutStream type (see
+ * FbsonStream.h). So unless you want to provide own a different output stream
+ * type, use FbsonParser object.
+ *
+ * @author Tian Xia <tianx@fb.com>
+ */
+
+#ifndef FBSON_FBSONWRITER_H
+#define FBSON_FBSONWRITER_H
+
+#ifndef ROCKSDB_LITE
+
+#include <stack>
+#include "FbsonDocument.h"
+#include "FbsonStream.h"
+
+namespace fbson {
+
+template <class OS_TYPE>
+class FbsonWriterT {
+ public:
+  FbsonWriterT()
+      : alloc_(true), hasHdr_(false), kvState_(WS_Value), str_pos_(0) {
+    os_ = new OS_TYPE();
+  }
+
+  explicit FbsonWriterT(OS_TYPE &os)
+      : os_(&os),
+        alloc_(false),
+        hasHdr_(false),
+        kvState_(WS_Value),
+        str_pos_(0) {}
+
+  ~FbsonWriterT() {
+    if (alloc_) {
+      delete os_;
+    }
+  }
+
+  void reset() {
+    os_->clear();
+    os_->seekp(0);
+    hasHdr_ = false;
+    kvState_ = WS_Value;
+    for (; !stack_.empty(); stack_.pop())
+      ;
+  }
+
+  // write a key string (or key id if an external dict is provided)
+  uint32_t writeKey(const char *key,
+                    uint8_t len,
+                    hDictInsert handler = nullptr) {
+    if (len && !stack_.empty() && verifyKeyState()) {
+      int key_id = -1;
+      if (handler) {
+        key_id = handler(key, len);
+      }
+
+      uint32_t size = sizeof(uint8_t);
+      if (key_id < 0) {
+        os_->put(len);
+        os_->write(key, len);
+        size += len;
+      } else if (key_id <= FbsonKeyValue::sMaxKeyId) {
+        FbsonKeyValue::keyid_type idx = key_id;
+        os_->put(0);
+        os_->write((char *)&idx, sizeof(FbsonKeyValue::keyid_type));
+        size += sizeof(FbsonKeyValue::keyid_type);
+      } else { // key id overflow
+        assert(0);
+        return 0;
+      }
+
+      kvState_ = WS_Key;
+      return size;
+    }
+
+    return 0;
+  }
+
+  // write a key id
+  uint32_t writeKey(FbsonKeyValue::keyid_type idx) {
+    if (!stack_.empty() && verifyKeyState()) {
+      os_->put(0);
+      os_->write((char *)&idx, sizeof(FbsonKeyValue::keyid_type));
+      kvState_ = WS_Key;
+      return sizeof(uint8_t) + sizeof(FbsonKeyValue::keyid_type);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeNull() {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Null);
+      kvState_ = WS_Value;
+      return sizeof(FbsonValue);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeBool(bool b) {
+    if (!stack_.empty() && verifyValueState()) {
+      if (b) {
+        os_->put((FbsonTypeUnder)FbsonType::T_True);
+      } else {
+        os_->put((FbsonTypeUnder)FbsonType::T_False);
+      }
+
+      kvState_ = WS_Value;
+      return sizeof(FbsonValue);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeInt8(int8_t v) {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Int8);
+      os_->put(v);
+      kvState_ = WS_Value;
+      return sizeof(Int8Val);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeInt16(int16_t v) {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Int16);
+      os_->write((char *)&v, sizeof(int16_t));
+      kvState_ = WS_Value;
+      return sizeof(Int16Val);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeInt32(int32_t v) {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Int32);
+      os_->write((char *)&v, sizeof(int32_t));
+      kvState_ = WS_Value;
+      return sizeof(Int32Val);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeInt64(int64_t v) {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Int64);
+      os_->write((char *)&v, sizeof(int64_t));
+      kvState_ = WS_Value;
+      return sizeof(Int64Val);
+    }
+
+    return 0;
+  }
+
+  uint32_t writeDouble(double v) {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Double);
+      os_->write((char *)&v, sizeof(double));
+      kvState_ = WS_Value;
+      return sizeof(DoubleVal);
+    }
+
+    return 0;
+  }
+
+  // must call writeStartString before writing a string val
+  bool writeStartString() {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_String);
+      str_pos_ = os_->tellp();
+
+      // fill the size bytes with 0 for now
+      uint32_t size = 0;
+      os_->write((char *)&size, sizeof(uint32_t));
+
+      kvState_ = WS_String;
+      return true;
+    }
+
+    return false;
+  }
+
+  // finish writing a string val
+  bool writeEndString() {
+    if (kvState_ == WS_String) {
+      std::streampos cur_pos = os_->tellp();
+      int32_t size = cur_pos - str_pos_ - sizeof(uint32_t);
+      assert(size >= 0);
+
+      os_->seekp(str_pos_);
+      os_->write((char *)&size, sizeof(uint32_t));
+      os_->seekp(cur_pos);
+
+      kvState_ = WS_Value;
+      return true;
+    }
+
+    return false;
+  }
+
+  uint32_t writeString(const char *str, uint32_t len) {
+    if (kvState_ == WS_String) {
+      os_->write(str, len);
+      return len;
+    }
+
+    return 0;
+  }
+
+  uint32_t writeString(char ch) {
+    if (kvState_ == WS_String) {
+      os_->put(ch);
+      return 1;
+    }
+
+    return 0;
+  }
+
+  // must call writeStartBinary before writing a binary val
+  bool writeStartBinary() {
+    if (!stack_.empty() && verifyValueState()) {
+      os_->put((FbsonTypeUnder)FbsonType::T_Binary);
+      str_pos_ = os_->tellp();
+
+      // fill the size bytes with 0 for now
+      uint32_t size = 0;
+      os_->write((char *)&size, sizeof(uint32_t));
+
+      kvState_ = WS_Binary;
+      return true;
+    }
+
+    return false;
+  }
+
+  // finish writing a binary val
+  bool writeEndBinary() {
+    if (kvState_ == WS_Binary) {
+      std::streampos cur_pos = os_->tellp();
+      int32_t size = cur_pos - str_pos_ - sizeof(uint32_t);
+      assert(size >= 0);
+
+      os_->seekp(str_pos_);
+      os_->write((char *)&size, sizeof(uint32_t));
+      os_->seekp(cur_pos);
+
+      kvState_ = WS_Value;
+      return true;
+    }
+
+    return false;
+  }
+
+  uint32_t writeBinary(const char *bin, uint32_t len) {
+    if (kvState_ == WS_Binary) {
+      os_->write(bin, len);
+      return len;
+    }
+
+    return 0;
+  }
+
+  // must call writeStartObject before writing an object val
+  bool writeStartObject() {
+    if (stack_.empty() || verifyValueState()) {
+      if (stack_.empty()) {
+        // if this is a new FBSON, write the header
+        if (!hasHdr_) {
+          writeHeader();
+        } else
+          return false;
+      }
+
+      os_->put((FbsonTypeUnder)FbsonType::T_Object);
+      // save the size position
+      stack_.push(WriteInfo({WS_Object, os_->tellp()}));
+
+      // fill the size bytes with 0 for now
+      uint32_t size = 0;
+      os_->write((char *)&size, sizeof(uint32_t));
+
+      kvState_ = WS_Value;
+      return true;
+    }
+
+    return false;
+  }
+
+  // finish writing an object val
+  bool writeEndObject() {
+    if (!stack_.empty() && stack_.top().state == WS_Object &&
+        kvState_ == WS_Value) {
+      WriteInfo &ci = stack_.top();
+      std::streampos cur_pos = os_->tellp();
+      int32_t size = cur_pos - ci.sz_pos - sizeof(uint32_t);
+      assert(size >= 0);
+
+      os_->seekp(ci.sz_pos);
+      os_->write((char *)&size, sizeof(uint32_t));
+      os_->seekp(cur_pos);
+      stack_.pop();
+
+      return true;
+    }
+
+    return false;
+  }
+
+  // must call writeStartArray before writing an array val
+  bool writeStartArray() {
+    if (stack_.empty() || verifyValueState()) {
+      if (stack_.empty()) {
+        // if this is a new FBSON, write the header
+        if (!hasHdr_) {
+          writeHeader();
+        } else
+          return false;
+      }
+
+      os_->put((FbsonTypeUnder)FbsonType::T_Array);
+      // save the size position
+      stack_.push(WriteInfo({WS_Array, os_->tellp()}));
+
+      // fill the size bytes with 0 for now
+      uint32_t size = 0;
+      os_->write((char *)&size, sizeof(uint32_t));
+
+      kvState_ = WS_Value;
+      return true;
+    }
+
+    return false;
+  }
+
+  // finish writing an array val
+  bool writeEndArray() {
+    if (!stack_.empty() && stack_.top().state == WS_Array &&
+        kvState_ == WS_Value) {
+      WriteInfo &ci = stack_.top();
+      std::streampos cur_pos = os_->tellp();
+      int32_t size = cur_pos - ci.sz_pos - sizeof(uint32_t);
+      assert(size >= 0);
+
+      os_->seekp(ci.sz_pos);
+      os_->write((char *)&size, sizeof(uint32_t));
+      os_->seekp(cur_pos);
+      stack_.pop();
+
+      return true;
+    }
+
+    return false;
+  }
+
+  OS_TYPE *getOutput() { return os_; }
+
+ private:
+  // verify we are in the right state before writing a value
+  bool verifyValueState() {
+    assert(!stack_.empty());
+    return (stack_.top().state == WS_Object && kvState_ == WS_Key) ||
+           (stack_.top().state == WS_Array && kvState_ == WS_Value);
+  }
+
+  // verify we are in the right state before writing a key
+  bool verifyKeyState() {
+    assert(!stack_.empty());
+    return stack_.top().state == WS_Object && kvState_ == WS_Value;
+  }
+
+  void writeHeader() {
+    os_->put(FBSON_VER);
+    hasHdr_ = true;
+  }
+
+ private:
+  enum WriteState {
+    WS_NONE,
+    WS_Array,
+    WS_Object,
+    WS_Key,
+    WS_Value,
+    WS_String,
+    WS_Binary,
+  };
+
+  struct WriteInfo {
+    WriteState state;
+    std::streampos sz_pos;
+  };
+
+ private:
+  OS_TYPE *os_;
+  bool alloc_;
+  bool hasHdr_;
+  WriteState kvState_; // key or value state
+  std::streampos str_pos_;
+  std::stack<WriteInfo> stack_;
+};
+
+typedef FbsonWriterT<FbsonOutStream> FbsonWriter;
+
+} // namespace fbson
+
+#endif  // ROCKSDB_LITE
+#endif // FBSON_FBSONWRITER_H

third-party/rapidjson/filestream.h

-#ifndef RAPIDJSON_FILESTREAM_H_
-#define RAPIDJSON_FILESTREAM_H_
-
-#include <cstdio>
-
-namespace rapidjson {
-
-//! Wrapper of C file stream for input or output.
-/*!
-	This simple wrapper does not check the validity of the stream.
-	\implements Stream
-*/
-class FileStream {
-public:
-	typedef char Ch;	//!< Character type. Only support char.
-
-	FileStream(FILE* fp) : fp_(fp), count_(0) { Read(); }
-	char Peek() const { return current_; }
-	char Take() { char c = current_; Read(); return c; }
-	size_t Tell() const { return count_; }
-	void Put(char c) { fputc(c, fp_); }
-
-	// Not implemented
-	char* PutBegin() { return 0; }
-	size_t PutEnd(char*) { return 0; }
-
-private:
-	void Read() {
-		RAPIDJSON_ASSERT(fp_ != 0);
-		int c = fgetc(fp_);
-		if (c != EOF) {
-			current_ = (char)c;
-			count_++;
-		}
-		else
-			current_ = '\0';
-	}
-
-	FILE* fp_;
-	char current_;
-	size_t count_;
-};
-
-} // namespace rapidjson
-
-#endif // RAPIDJSON_FILESTREAM_H_

third-party/rapidjson/internal/pow10.h

-#ifndef RAPIDJSON_POW10_
-#define RAPIDJSON_POW10_
-
-namespace rapidjson {
-namespace internal {
-
-//! Computes integer powers of 10 in double (10.0^n).
-/*! This function uses lookup table for fast and accurate results.
-	\param n positive/negative exponent. Must <= 308.
-	\return 10.0^n
-*/
-inline double Pow10(int n) {
-	static const double e[] = { // 1e-308...1e308: 617 * 8 bytes = 4936 bytes
-		1e-308,1e-307,1e-306,1e-305,1e-304,1e-303,1e-302,1e-301,1e-300,
-		1e-299,1e-298,1e-297,1e-296,1e-295,1e-294,1e-293,1e-292,1e-291,1e-290,1e-289,1e-288,1e-287,1e-286,1e-285,1e-284,1e-283,1e-282,1e-281,1e-280,
-		1e-279,1e-278,1e-277,1e-276,1e-275,1e-274,1e-273,1e-272,1e-271,1e-270,1e-269,1e-268,1e-267,1e-266,1e-265,1e-264,1e-263,1e-262,1e-261,1e-260,
-		1e-259,1e-258,1e-257,1e-256,1e-255,1e-254,1e-253,1e-252,1e-251,1e-250,1e-249,1e-248,1e-247,1e-246,1e-245,1e-244,1e-243,1e-242,1e-241,1e-240,
-		1e-239,1e-238,1e-237,1e-236,1e-235,1e-234,1e-233,1e-232,1e-231,1e-230,1e-229,1e-228,1e-227,1e-226,1e-225,1e-224,1e-223,1e-222,1e-221,1e-220,
-		1e-219,1e-218,1e-217,1e-216,1e-215,1e-214,1e-213,1e-212,1e-211,1e-210,1e-209,1e-208,1e-207,1e-206,1e-205,1e-204,1e-203,1e-202,1e-201,1e-200,
-		1e-199,1e-198,1e-197,1e-196,1e-195,1e-194,1e-193,1e-192,1e-191,1e-190,1e-189,1e-188,1e-187,1e-186,1e-185,1e-184,1e-183,1e-182,1e-181,1e-180,
-		1e-179,1e-178,1e-177,1e-176,1e-175,1e-174,1e-173,1e-172,1e-171,1e-170,1e-169,1e-168,1e-167,1e-166,1e-165,1e-164,1e-163,1e-162,1e-161,1e-160,
-		1e-159,1e-158,1e-157,1e-156,1e-155,1e-154,1e-153,1e-152,1e-151,1e-150,1e-149,1e-148,1e-147,1e-146,1e-145,1e-144,1e-143,1e-142,1e-141,1e-140,
-		1e-139,1e-138,1e-137,1e-136,1e-135,1e-134,1e-133,1e-132,1e-131,1e-130,1e-129,1e-128,1e-127,1e-126,1e-125,1e-124,1e-123,1e-122,1e-121,1e-120,
-		1e-119,1e-118,1e-117,1e-116,1e-115,1e-114,1e-113,1e-112,1e-111,1e-110,1e-109,1e-108,1e-107,1e-106,1e-105,1e-104,1e-103,1e-102,1e-101,1e-100,
-		1e-99, 1e-98, 1e-97, 1e-96, 1e-95, 1e-94, 1e-93, 1e-92, 1e-91, 1e-90, 1e-89, 1e-88, 1e-87, 1e-86, 1e-85, 1e-84, 1e-83, 1e-82, 1e-81, 1e-80, 
-		1e-79, 1e-78, 1e-77, 1e-76, 1e-75, 1e-74, 1e-73, 1e-72, 1e-71, 1e-70, 1e-69, 1e-68, 1e-67, 1e-66, 1e-65, 1e-64, 1e-63, 1e-62, 1e-61, 1e-60, 
-		1e-59, 1e-58, 1e-57, 1e-56, 1e-55, 1e-54, 1e-53, 1e-52, 1e-51, 1e-50, 1e-49, 1e-48, 1e-47, 1e-46, 1e-45, 1e-44, 1e-43, 1e-42, 1e-41, 1e-40, 
-		1e-39, 1e-38, 1e-37, 1e-36, 1e-35, 1e-34, 1e-33, 1e-32, 1e-31, 1e-30, 1e-29, 1e-28, 1e-27, 1e-26, 1e-25, 1e-24, 1e-23, 1e-22, 1e-21, 1e-20, 
-		1e-19, 1e-18, 1e-17, 1e-16, 1e-15, 1e-14, 1e-13, 1e-12, 1e-11, 1e-10, 1e-9,  1e-8,  1e-7,  1e-6,  1e-5,  1e-4,  1e-3,  1e-2,  1e-1,  1e+0,  
-		1e+1,  1e+2,  1e+3,  1e+4,  1e+5,  1e+6,  1e+7,  1e+8,  1e+9,  1e+10, 1e+11, 1e+12, 1e+13, 1e+14, 1e+15, 1e+16, 1e+17, 1e+18, 1e+19, 1e+20, 
-		1e+21, 1e+22, 1e+23, 1e+24, 1e+25, 1e+26, 1e+27, 1e+28, 1e+29, 1e+30, 1e+31, 1e+32, 1e+33, 1e+34, 1e+35, 1e+36, 1e+37, 1e+38, 1e+39, 1e+40,
-		1e+41, 1e+42, 1e+43, 1e+44, 1e+45, 1e+46, 1e+47, 1e+48, 1e+49, 1e+50, 1e+51, 1e+52, 1e+53, 1e+54, 1e+55, 1e+56, 1e+57, 1e+58, 1e+59, 1e+60,
-		1e+61, 1e+62, 1e+63, 1e+64, 1e+65, 1e+66, 1e+67, 1e+68, 1e+69, 1e+70, 1e+71, 1e+72, 1e+73, 1e+74, 1e+75, 1e+76, 1e+77, 1e+78, 1e+79, 1e+80,
-		1e+81, 1e+82, 1e+83, 1e+84, 1e+85, 1e+86, 1e+87, 1e+88, 1e+89, 1e+90, 1e+91, 1e+92, 1e+93, 1e+94, 1e+95, 1e+96, 1e+97, 1e+98, 1e+99, 1e+100,
-		1e+101,1e+102,1e+103,1e+104,1e+105,1e+106,1e+107,1e+108,1e+109,1e+110,1e+111,1e+112,1e+113,1e+114,1e+115,1e+116,1e+117,1e+118,1e+119,1e+120,
-		1e+121,1e+122,1e+123,1e+124,1e+125,1e+126,1e+127,1e+128,1e+129,1e+130,1e+131,1e+132,1e+133,1e+134,1e+135,1e+136,1e+137,1e+138,1e+139,1e+140,
-		1e+141,1e+142,1e+143,1e+144,1e+145,1e+146,1e+147,1e+148,1e+149,1e+150,1e+151,1e+152,1e+153,1e+154,1e+155,1e+156,1e+157,1e+158,1e+159,1e+160,
-		1e+161,1e+162,1e+163,1e+164,1e+165,1e+166,1e+167,1e+168,1e+169,1e+170,1e+171,1e+172,1e+173,1e+174,1e+175,1e+176,1e+177,1e+178,1e+179,1e+180,
-		1e+181,1e+182,1e+183,1e+184,1e+185,1e+186,1e+187,1e+188,1e+189,1e+190,1e+191,1e+192,1e+193,1e+194,1e+195,1e+196,1e+197,1e+198,1e+199,1e+200,
-		1e+201,1e+202,1e+203,1e+204,1e+205,1e+206,1e+207,1e+208,1e+209,1e+210,1e+211,1e+212,1e+213,1e+214,1e+215,1e+216,1e+217,1e+218,1e+219,1e+220,
-		1e+221,1e+222,1e+223,1e+224,1e+225,1e+226,1e+227,1e+228,1e+229,1e+230,1e+231,1e+232,1e+233,1e+234,1e+235,1e+236,1e+237,1e+238,1e+239,1e+240,
-		1e+241,1e+242,1e+243,1e+244,1e+245,1e+246,1e+247,1e+248,1e+249,1e+250,1e+251,1e+252,1e+253,1e+254,1e+255,1e+256,1e+257,1e+258,1e+259,1e+260,
-		1e+261,1e+262,1e+263,1e+264,1e+265,1e+266,1e+267,1e+268,1e+269,1e+270,1e+271,1e+272,1e+273,1e+274,1e+275,1e+276,1e+277,1e+278,1e+279,1e+280,
-		1e+281,1e+282,1e+283,1e+284,1e+285,1e+286,1e+287,1e+288,1e+289,1e+290,1e+291,1e+292,1e+293,1e+294,1e+295,1e+296,1e+297,1e+298,1e+299,1e+300,
-		1e+301,1e+302,1e+303,1e+304,1e+305,1e+306,1e+307,1e+308
-	};
-	RAPIDJSON_ASSERT(n <= 308);
-	return n < -308 ? 0.0 : e[n + 308];
-}
-
-} // namespace internal
-} // namespace rapidjson
-
-#endif // RAPIDJSON_POW10_

third-party/rapidjson/internal/stack.h

-#ifndef RAPIDJSON_INTERNAL_STACK_H_
-#define RAPIDJSON_INTERNAL_STACK_H_
-
-namespace rapidjson {
-namespace internal {
-
-///////////////////////////////////////////////////////////////////////////////
-// Stack
-
-//! A type-unsafe stack for storing different types of data.
-/*! \tparam Allocator Allocator for allocating stack memory.
-*/
-template <typename Allocator>
-class Stack {
-public:
-	Stack(Allocator* allocator, size_t stack_capacity) : allocator_(allocator), own_allocator_(0), stack_(0), stack_top_(0), stack_end_(0), stack_capacity_(stack_capacity) {
-		RAPIDJSON_ASSERT(stack_capacity_ > 0);
-		if (!allocator_)
-			own_allocator_ = allocator_ = new Allocator();
-		stack_top_ = stack_ = (char*)allocator_->Malloc(stack_capacity_);
-		stack_end_ = stack_ + stack_capacity_;
-	}
-
-	~Stack() {
-		Allocator::Free(stack_);
-		delete own_allocator_; // Only delete if it is owned by the stack
-	}
-
-	void Clear() { /*stack_top_ = 0;*/ stack_top_ = stack_; }
-
-	template<typename T>
-	T* Push(size_t count = 1) {
-		 // Expand the stack if needed
-		if (stack_top_ + sizeof(T) * count >= stack_end_) {
-			size_t new_capacity = stack_capacity_ * 2;
-			size_t size = GetSize();
-			size_t new_size = GetSize() + sizeof(T) * count;
-			if (new_capacity < new_size)
-				new_capacity = new_size;
-			stack_ = (char*)allocator_->Realloc(stack_, stack_capacity_, new_capacity);
-			stack_capacity_ = new_capacity;
-			stack_top_ = stack_ + size;
-			stack_end_ = stack_ + stack_capacity_;
-		}
-		T* ret = (T*)stack_top_;
-		stack_top_ += sizeof(T) * count;
-		return ret;
-	}
-
-	template<typename T>
-	T* Pop(size_t count) {
-		RAPIDJSON_ASSERT(GetSize() >= count * sizeof(T));
-		stack_top_ -= count * sizeof(T);
-		return (T*)stack_top_;
-	}
-
-	template<typename T>
-	T* Top() { 
-		RAPIDJSON_ASSERT(GetSize() >= sizeof(T));
-		return (T*)(stack_top_ - sizeof(T));
-	}
-
-	template<typename T>
-	T* Bottom() { return (T*)stack_; }
-
-	Allocator& GetAllocator() { return *allocator_; }
-	size_t GetSize() const { return stack_top_ - stack_; }
-	size_t GetCapacity() const { return stack_capacity_; }
-
-private:
-	Allocator* allocator_;
-	Allocator* own_allocator_;
-	char *stack_;
-	char *stack_top_;
-	char *stack_end_;
-	size_t stack_capacity_;
-};
-
-} // namespace internal
-} // namespace rapidjson
-
-#endif // RAPIDJSON_STACK_H_

third-party/rapidjson/internal/strfunc.h

-#ifndef RAPIDJSON_INTERNAL_STRFUNC_H_
-#define RAPIDJSON_INTERNAL_STRFUNC_H_
-
-namespace rapidjson {
-namespace internal {
-
-//! Custom strlen() which works on different character types.
-/*!	\tparam Ch Character type (e.g. char, wchar_t, short)
-	\param s Null-terminated input string.
-	\return Number of characters in the string. 
-	\note This has the same semantics as strlen(), the return value is not number of Unicode codepoints.
-*/
-template <typename Ch>
-inline SizeType StrLen(const Ch* s) {
-	const Ch* p = s;
-	while (*p != '\0')
-		++p;
-	return SizeType(p - s);
-}
-
-} // namespace internal
-} // namespace rapidjson
-
-#endif // RAPIDJSON_INTERNAL_STRFUNC_H_

third-party/rapidjson/license.txt

-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.
\ No newline at end of file

third-party/rapidjson/prettywriter.h

-#ifndef RAPIDJSON_PRETTYWRITER_H_
-#define RAPIDJSON_PRETTYWRITER_H_
-
-#include "writer.h"
-
-namespace rapidjson {
-
-//! Writer with indentation and spacing.
-/*!
-	\tparam Stream Type of ouptut stream.
-	\tparam Encoding Encoding of both source strings and output.
-	\tparam Allocator Type of allocator for allocating memory of stack.
-*/
-template<typename Stream, typename Encoding = UTF8<>, typename Allocator = MemoryPoolAllocator<> >
-class PrettyWriter : public Writer<Stream, Encoding, Allocator> {
-public:
-	typedef Writer<Stream, Encoding, Allocator> Base;
-	typedef typename Base::Ch Ch;
-
-	//! Constructor
-	/*! \param stream Output stream.
-		\param allocator User supplied allocator. If it is null, it will create a private one.
-		\param levelDepth Initial capacity of 
-	*/
-	PrettyWriter(Stream& stream, Allocator* allocator = 0, size_t levelDepth = Base::kDefaultLevelDepth) : 
-		Base(stream, allocator, levelDepth), indentChar_(' '), indentCharCount_(4) {}
-
-	//! Set custom indentation.
-	/*! \param indentChar		Character for indentation. Must be whitespace character (' ', '\t', '\n', '\r').
-		\param indentCharCount	Number of indent characters for each indentation level.
-		\note The default indentation is 4 spaces.
-	*/
-	PrettyWriter& SetIndent(Ch indentChar, unsigned indentCharCount) {
-		RAPIDJSON_ASSERT(indentChar == ' ' || indentChar == '\t' || indentChar == '\n' || indentChar == '\r');
-		indentChar_ = indentChar;
-		indentCharCount_ = indentCharCount;
-		return *this;
-	}
-
-	//@name Implementation of Handler.
-	//@{
-
-	PrettyWriter& Null()				{ PrettyPrefix(kNullType);   Base::WriteNull();			return *this; }
-	PrettyWriter& Bool(bool b)			{ PrettyPrefix(b ? kTrueType : kFalseType); Base::WriteBool(b); return *this; }
-	PrettyWriter& Int(int i)			{ PrettyPrefix(kNumberType); Base::WriteInt(i);			return *this; }
-	PrettyWriter& Uint(unsigned u)		{ PrettyPrefix(kNumberType); Base::WriteUint(u);		return *this; }
-	PrettyWriter& Int64(int64_t i64)	{ PrettyPrefix(kNumberType); Base::WriteInt64(i64);		return *this; }
-	PrettyWriter& Uint64(uint64_t u64)	{ PrettyPrefix(kNumberType); Base::WriteUint64(u64);	return *this; }
-	PrettyWriter& Double(double d)		{ PrettyPrefix(kNumberType); Base::WriteDouble(d);		return *this; }
-
-	PrettyWriter& String(const Ch* str, SizeType length, bool copy = false) {
-		(void)copy;
-		PrettyPrefix(kStringType);
-		Base::WriteString(str, length);
-		return *this;
-	}
-
-	PrettyWriter& StartObject() {
-		PrettyPrefix(kObjectType);
-		new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(false);
-		Base::WriteStartObject();
-		return *this;
-	}
-
-	PrettyWriter& EndObject(SizeType memberCount = 0) {
-		(void)memberCount;
-		RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
-		RAPIDJSON_ASSERT(!Base::level_stack_.template Top<typename Base::Level>()->inArray);
-		bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
-
-		if (!empty) {
-			Base::stream_.Put('\n');
-			WriteIndent();
-		}
-		Base::WriteEndObject();
-		return *this;
-	}
-
-	PrettyWriter& StartArray() {
-		PrettyPrefix(kArrayType);
-		new (Base::level_stack_.template Push<typename Base::Level>()) typename Base::Level(true);
-		Base::WriteStartArray();
-		return *this;
-	}
-
-	PrettyWriter& EndArray(SizeType memberCount = 0) {
-		(void)memberCount;
-		RAPIDJSON_ASSERT(Base::level_stack_.GetSize() >= sizeof(typename Base::Level));
-		RAPIDJSON_ASSERT(Base::level_stack_.template Top<typename Base::Level>()->inArray);
-		bool empty = Base::level_stack_.template Pop<typename Base::Level>(1)->valueCount == 0;
-
-		if (!empty) {
-			Base::stream_.Put('\n');
-			WriteIndent();
-		}
-		Base::WriteEndArray();
-		return *this;
-	}
-
-	//@}
-
-	//! Simpler but slower overload.
-	PrettyWriter& String(const Ch* str) { return String(str, internal::StrLen(str)); }
-
-protected:
-	void PrettyPrefix(Type type) {
-		(void)type;
-		if (Base::level_stack_.GetSize() != 0) { // this value is not at root
-			typename Base::Level* level = Base::level_stack_.template Top<typename Base::Level>();
-
-			if (level->inArray) {
-				if (level->valueCount > 0) {
-					Base::stream_.Put(','); // add comma if it is not the first element in array
-					Base::stream_.Put('\n');
-				}
-				else
-					Base::stream_.Put('\n');
-				WriteIndent();
-			}
-			else {	// in object
-				if (level->valueCount > 0) {
-					if (level->valueCount % 2 == 0) {
-						Base::stream_.Put(',');
-						Base::stream_.Put('\n');
-					}
-					else {
-						Base::stream_.Put(':');
-						Base::stream_.Put(' ');
-					}
-				}
-				else
-					Base::stream_.Put('\n');
-
-				if (level->valueCount % 2 == 0)
-					WriteIndent();
-			}
-			if (!level->inArray && level->valueCount % 2 == 0)
-				RAPIDJSON_ASSERT(type == kStringType);  // if it's in object, then even number should be a name
-			level->valueCount++;
-		}
-		else
-			RAPIDJSON_ASSERT(type == kObjectType || type == kArrayType);
-	}
-
-	void WriteIndent()  {
-		size_t count = (Base::level_stack_.GetSize() / sizeof(typename Base::Level)) * indentCharCount_;
-		PutN(Base::stream_, indentChar_, count);
-	}
-
-	Ch indentChar_;
-	unsigned indentCharCount_;
-};
-
-} // namespace rapidjson
-
-#endif // RAPIDJSON_RAPIDJSON_H_

third-party/rapidjson/rapidjson.h

-#ifndef RAPIDJSON_RAPIDJSON_H_
-#define RAPIDJSON_RAPIDJSON_H_
-
-// Copyright (c) 2011-2012 Milo Yip (miloyip@gmail.com)
-// Version 0.11
-
-#include <cstdlib>	// malloc(), realloc(), free()
-#include <cstring>	// memcpy()
-
-///////////////////////////////////////////////////////////////////////////////
-// RAPIDJSON_NO_INT64DEFINE
-
-// Here defines int64_t and uint64_t types in global namespace.
-// If user have their own definition, can define RAPIDJSON_NO_INT64DEFINE to disable this.
-#ifndef RAPIDJSON_NO_INT64DEFINE
-#ifdef _MSC_VER
-typedef __int64 int64_t;
-typedef unsigned __int64 uint64_t;
-#else
-#include <inttypes.h>
-#endif
-#endif // RAPIDJSON_NO_INT64TYPEDEF
-
-///////////////////////////////////////////////////////////////////////////////
-// RAPIDJSON_ENDIAN
-#define RAPIDJSON_LITTLEENDIAN	0	//!< Little endian machine
-#define RAPIDJSON_BIGENDIAN		1	//!< Big endian machine
-
-//! Endianness of the machine.
-/*!	GCC provided macro for detecting endianness of the target machine. But other
-	compilers may not have this. User can define RAPIDJSON_ENDIAN to either
-	RAPIDJSON_LITTLEENDIAN or RAPIDJSON_BIGENDIAN.
-*/
-#ifndef RAPIDJSON_ENDIAN
-#ifdef __BYTE_ORDER__
-#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
-#define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN
-#else
-#define RAPIDJSON_ENDIAN RAPIDJSON_BIGENDIAN
-#endif // __BYTE_ORDER__
-#else
-#define RAPIDJSON_ENDIAN RAPIDJSON_LITTLEENDIAN	// Assumes little endian otherwise.
-#endif
-#endif // RAPIDJSON_ENDIAN
-
-///////////////////////////////////////////////////////////////////////////////
-// RAPIDJSON_SSE2/RAPIDJSON_SSE42/RAPIDJSON_SIMD
-
-// Enable SSE2 optimization.
-//#define RAPIDJSON_SSE2
-
-// Enable SSE4.2 optimization.
-//#define RAPIDJSON_SSE42
-
-#if defined(RAPIDJSON_SSE2) || defined(RAPIDJSON_SSE42)
-#define RAPIDJSON_SIMD
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
-// RAPIDJSON_NO_SIZETYPEDEFINE
-
-#ifndef RAPIDJSON_NO_SIZETYPEDEFINE
-namespace rapidjson {
-//! Use 32-bit array/string indices even for 64-bit platform, instead of using size_t.
-/*! User may override the SizeType by defining RAPIDJSON_NO_SIZETYPEDEFINE.
-*/
-typedef unsigned SizeType;
-} // namespace rapidjson
-#endif
-
-///////////////////////////////////////////////////////////////////////////////
-// RAPIDJSON_ASSERT
-
-//! Assertion.
-/*! By default, rapidjson uses C assert() for assertion.
-	User can override it by defining RAPIDJSON_ASSERT(x) macro.
-*/
-#ifndef RAPIDJSON_ASSERT
-#include <cassert>
-#define RAPIDJSON_ASSERT(x) assert(x)
-#endif // RAPIDJSON_ASSERT
-
-///////////////////////////////////////////////////////////////////////////////
-// Helpers
-
-#define RAPIDJSON_MULTILINEMACRO_BEGIN do {  
-#define RAPIDJSON_MULTILINEMACRO_END \
-} while((void)0, 0)
-
-namespace rapidjson {
-
-///////////////////////////////////////////////////////////////////////////////
-// Allocator
-
-/*! \class rapidjson::Allocator
-	\brief Concept for allocating, resizing and freeing memory block.
-	
-	Note that Malloc() and Realloc() are non-static but Free() is static.
-	
-	So if an allocator need to support Free(), it needs to put its pointer in 
-	the header of memory block.
-
-\code
-concept Allocator {
-	static const bool kNeedFree;	//!< Whether this allocator needs to call Free().
-
-	// Allocate a memory block.
-	// \param size of the memory block in bytes.
-	// \returns pointer to the memory block.
-	void* Malloc(size_t size);
-
-	// Resize a memory block.
-	// \param originalPtr The pointer to current memory block. Null pointer is permitted.
-	// \param originalSize The current size in bytes. (Design issue: since some allocator may not book-keep this, explicitly pass to it can save memory.)
-	// \param newSize the new size in bytes.
-	void* Realloc(void* originalPtr, size_t originalSize, size_t newSize);
-
-	// Free a memory block.
-	// \param pointer to the memory block. Null pointer is permitted.
-	static void Free(void *ptr);
-};
-\endcode
-*/
-
-///////////////////////////////////////////////////////////////////////////////
-// CrtAllocator
-
-//! C-runtime library allocator.
-/*! This class is just wrapper for standard C library memory routines.
-	\implements Allocator
-*/
-class CrtAllocator {
-public:
-	static const bool kNeedFree = true;
-	void* Malloc(size_t size) { return malloc(size); }
-	void* Realloc(void* originalPtr, size_t originalSize, size_t newSize) { (void)originalSize; return realloc(originalPtr, newSize); }
-	static void Free(void *ptr) { free(ptr); }
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// MemoryPoolAllocator
-
-//! Default memory allocator used by the parser and DOM.
-/*! This allocator allocate memory blocks from pre-allocated memory chunks. 
-
-    It does not free memory blocks. And Realloc() only allocate new memory.
-
-    The memory chunks are allocated by BaseAllocator, which is CrtAllocator by default.
-
-    User may also supply a buffer as the first chunk.
-
-    If the user-buffer is full then additional chunks are allocated by BaseAllocator.
-
-    The user-buffer is not deallocated by this allocator.
-
-    \tparam BaseAllocator the allocator type for allocating memory chunks. Default is CrtAllocator.
-	\implements Allocator
-*/
-template <typename BaseAllocator = CrtAllocator>
-class MemoryPoolAllocator {
-public:
-	static const bool kNeedFree = false;	//!< Tell users that no need to call Free() with this allocator. (concept Allocator)
-
-	//! Constructor with chunkSize.
-	/*! \param chunkSize The size of memory chunk. The default is kDefaultChunkSize.
-		\param baseAllocator The allocator for allocating memory chunks.
-	*/
-	MemoryPoolAllocator(size_t chunkSize = kDefaultChunkCapacity, BaseAllocator* baseAllocator = 0) : 
-		chunkHead_(0), chunk_capacity_(chunkSize), userBuffer_(0), baseAllocator_(baseAllocator), ownBaseAllocator_(0)
-	{
-		if (!baseAllocator_)
-			ownBaseAllocator_ = baseAllocator_ = new BaseAllocator();
-		AddChunk(chunk_capacity_);
-	}
-
-	//! Constructor with user-supplied buffer.
-	/*! The user buffer will be used firstly. When it is full, memory pool allocates new chunk with chunk size.
-
-		The user buffer will not be deallocated when this allocator is destructed.
-
-		\param buffer User supplied buffer.
-		\param size Size of the buffer in bytes. It must at least larger than sizeof(ChunkHeader).
-		\param chunkSize The size of memory chunk. The default is kDefaultChunkSize.
-		\param baseAllocator The allocator for allocating memory chunks.
-	*/
-	MemoryPoolAllocator(char *buffer, size_t size, size_t chunkSize = kDefaultChunkCapacity, BaseAllocator* baseAllocator = 0) :
-		chunkHead_(0), chunk_capacity_(chunkSize), userBuffer_(buffer), baseAllocator_(baseAllocator), ownBaseAllocator_(0)
-	{
-		RAPIDJSON_ASSERT(buffer != 0);
-		RAPIDJSON_ASSERT(size > sizeof(ChunkHeader));
-		chunkHead_ = (ChunkHeader*)buffer;
-		chunkHead_->capacity = size - sizeof(ChunkHeader);
-		chunkHead_->size = 0;
-		chunkHead_->next = 0;
-	}
-
-	//! Destructor.
-	/*! This deallocates all memory chunks, excluding the user-supplied buffer.
-	*/
-	~MemoryPoolAllocator() {
-		Clear();
-		delete ownBaseAllocator_;
-	}
-
-	//! Deallocates all memory chunks, excluding the user-supplied buffer.
-	void Clear() {
-		while(chunkHead_ != 0 && chunkHead_ != (ChunkHeader *)userBuffer_) {
-			ChunkHeader* next = chunkHead_->next;
-			baseAllocator_->Free(chunkHead_);
-			chunkHead_ = next;
-		}
-	}
-
-	//! Computes the total capacity of allocated memory chunks.
-	/*! \return total capacity in bytes.
-	*/
-	size_t Capacity() {
-		size_t capacity = 0;
-		for (ChunkHeader* c = chunkHead_; c != 0; c = c->next)
-			capacity += c->capacity;
-		return capacity;
-	}
-
-	//! Computes the memory blocks allocated.
-	/*! \return total used bytes.
-	*/
-	size_t Size() {
-		size_t size = 0;
-		for (ChunkHeader* c = chunkHead_; c != 0; c = c->next)
-			size += c->size;
-		return size;
-	}
-
-	//! Allocates a memory block. (concept Allocator)
-	void* Malloc(size_t size) {
-		size = (size + 3) & ~3;	// Force aligning size to 4
-
-		if (chunkHead_->size + size > chunkHead_->capacity)
-			AddChunk(chunk_capacity_ > size ? chunk_capacity_ : size);
-
-		char *buffer = (char *)(chunkHead_ + 1) + chunkHead_->size;
-		RAPIDJSON_ASSERT(((uintptr_t)buffer & 3) == 0);	// returned buffer is aligned to 4
-		chunkHead_->size += size;
-
-		return buffer;
-	}
-
-	//! Resizes a memory block (concept Allocator)
-	void* Realloc(void* originalPtr, size_t originalSize, size_t newSize) {
-		if (originalPtr == 0)
-			return Malloc(newSize);
-
-		// Do not shrink if new size is smaller than original
-		if (originalSize >= newSize)
-			return originalPtr;
-
-		// Simply expand it if it is the last allocation and there is sufficient space
-		if (originalPtr == (char *)(chunkHead_ + 1) + chunkHead_->size - originalSize) {
-			size_t increment = newSize - originalSize;
-			increment = (increment + 3) & ~3;	// Force aligning size to 4
-			if (chunkHead_->size + increment <= chunkHead_->capacity) {
-				chunkHead_->size += increment;
-				RAPIDJSON_ASSERT(((uintptr_t)originalPtr & 3) == 0);	// returned buffer is aligned to 4
-				return originalPtr;
-			}
-		}
-
-		// Realloc process: allocate and copy memory, do not free original buffer.
-		void* newBuffer = Malloc(newSize);
-		RAPIDJSON_ASSERT(newBuffer != 0);	// Do not handle out-of-memory explicitly.
-		return memcpy(newBuffer, originalPtr, originalSize);
-	}
-
-	//! Frees a memory block (concept Allocator)
-	static void Free(void *) {} // Do nothing
-
-private:
-	//! Creates a new chunk.
-	/*! \param capacity Capacity of the chunk in bytes.
-	*/
-	void AddChunk(size_t capacity) {
-		ChunkHeader* chunk = (ChunkHeader*)baseAllocator_->Malloc(sizeof(ChunkHeader) + capacity);
-		chunk->capacity = capacity;
-		chunk->size = 0;
-		chunk->next = chunkHead_;
-		chunkHead_ =  chunk;
-	}
-
-	static const int kDefaultChunkCapacity = 64 * 1024; //!< Default chunk capacity.
-
-	//! Chunk header for perpending to each chunk.
-	/*! Chunks are stored as a singly linked list.
-	*/
-	struct ChunkHeader {
-		size_t capacity;	//!< Capacity of the chunk in bytes (excluding the header itself).
-		size_t size;		//!< Current size of allocated memory in bytes.
-		ChunkHeader *next;	//!< Next chunk in the linked list.
-	};
-
-	ChunkHeader *chunkHead_;	//!< Head of the chunk linked-list. Only the head chunk serves allocation.
-	size_t chunk_capacity_;		//!< The minimum capacity of chunk when they are allocated.
-	char *userBuffer_;			//!< User supplied buffer.
-	BaseAllocator* baseAllocator_;	//!< base allocator for allocating memory chunks.
-	BaseAllocator* ownBaseAllocator_;	//!< base allocator created by this object.
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// Encoding
-
-/*! \class rapidjson::Encoding
-	\brief Concept for encoding of Unicode characters.
-
-\code
-concept Encoding {
-	typename Ch;	//! Type of character.
-
-	//! \brief Encode a Unicode codepoint to a buffer.
-	//! \param buffer pointer to destination buffer to store the result. It should have sufficient size of encoding one character.
-	//! \param codepoint An unicode codepoint, ranging from 0x0 to 0x10FFFF inclusively.
-	//! \returns the pointer to the next character after the encoded data.
-	static Ch* Encode(Ch *buffer, unsigned codepoint);
-};
-\endcode
-*/
-
-///////////////////////////////////////////////////////////////////////////////
-// UTF8
-
-//! UTF-8 encoding.
-/*! http://en.wikipedia.org/wiki/UTF-8
-	\tparam CharType Type for storing 8-bit UTF-8 data. Default is char.
-	\implements Encoding
-*/
-template<typename CharType = char>
-struct UTF8 {
-	typedef CharType Ch;
-
-	static Ch* Encode(Ch *buffer, unsigned codepoint) {
-		if (codepoint <= 0x7F) 
-			*buffer++ = codepoint & 0xFF;
-		else if (codepoint <= 0x7FF) {
-			*buffer++ = 0xC0 | ((codepoint >> 6) & 0xFF);
-			*buffer++ = 0x80 | ((codepoint & 0x3F));
-		}
-		else if (codepoint <= 0xFFFF) {
-			*buffer++ = 0xE0 | ((codepoint >> 12) & 0xFF);
-			*buffer++ = 0x80 | ((codepoint >> 6) & 0x3F);
-			*buffer++ = 0x80 | (codepoint & 0x3F);
-		}
-		else {
-			RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
-			*buffer++ = 0xF0 | ((codepoint >> 18) & 0xFF);
-			*buffer++ = 0x80 | ((codepoint >> 12) & 0x3F);
-			*buffer++ = 0x80 | ((codepoint >> 6) & 0x3F);
-			*buffer++ = 0x80 | (codepoint & 0x3F);
-		}
-		return buffer;
-	}
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// UTF16
-
-//! UTF-16 encoding.
-/*! http://en.wikipedia.org/wiki/UTF-16
-	\tparam CharType Type for storing 16-bit UTF-16 data. Default is wchar_t. C++11 may use char16_t instead.
-	\implements Encoding
-*/
-template<typename CharType = wchar_t>
-struct UTF16 {
-	typedef CharType Ch;
-
-	static Ch* Encode(Ch* buffer, unsigned codepoint) {
-		if (codepoint <= 0xFFFF) {
-			RAPIDJSON_ASSERT(codepoint < 0xD800 || codepoint > 0xDFFF); // Code point itself cannot be surrogate pair 
-			*buffer++ = static_cast<Ch>(codepoint);
-		}
-		else {
-			RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
-			unsigned v = codepoint - 0x10000;
-			*buffer++ = static_cast<Ch>((v >> 10) + 0xD800);
-			*buffer++ = (v & 0x3FF) + 0xDC00;
-		}
-		return buffer;
-	}
-};
-
-///////////////////////////////////////////////////////////////////////////////
-// UTF32
-
-//! UTF-32 encoding. 
-/*! http://en.wikipedia.org/wiki/UTF-32
-	\tparam Ch Type for storing 32-bit UTF-32 data. Default is unsigned. C++11 may use char32_t instead.
-	\implements Encoding
-*/
-template<typename CharType = unsigned>
-struct UTF32 {
-	typedef CharType Ch;
-
-	static Ch *Encode(Ch* buffer, unsigned codepoint) {
-		RAPIDJSON_ASSERT(codepoint <= 0x10FFFF);
-		*buffer++ = codepoint;
-		return buffer;
-	}
-};
-
-///////////////////////////////////////////////////////////////////////////////
-//  Stream
-
-/*! \class rapidjson::Stream
-	\brief Concept for reading and writing characters.
-
-	For read-only stream, no need to implement PutBegin(), Put() and PutEnd().
-
-	For write-only stream, only need to implement Put().
-
-\code
-concept Stream {
-	typename Ch;	//!< Character type of the stream.
-
-	//! Read the current character from stream without moving the read cursor.
-	Ch Peek() const;
-
-	//! Read the current character from stream and moving the read cursor to next character.
-	Ch Take();
-
-	//! Get the current read cursor.
-	//! \return Number of characters read from start.
-	size_t Tell();
-
-	//! Begin writing operation at the current read pointer.
-	//! \return The begin writer pointer.
-	Ch* PutBegin();
-
-	//! Write a character.
-	void Put(Ch c);
-
-	//! End the writing operation.
-	//! \param begin The begin write pointer returned by PutBegin().
-	//! \return Number of characters written.
-	size_t PutEnd(Ch* begin);
-}
-\endcode
-*/
-
-//! Put N copies of a character to a stream.
-template<typename Stream, typename Ch>
-inline void PutN(Stream& stream, Ch c, size_t n) {
-	for (size_t i = 0; i < n; i++)
-		stream.Put(c);
-}
-
-///////////////////////////////////////////////////////////////////////////////
-// StringStream
-
-//! Read-only string stream.
-/*! \implements Stream
-*/
-template <typename Encoding>
-struct GenericStringStream {
-	typedef typename Encoding::Ch Ch;
-
-	GenericStringStream(const Ch *src) : src_(src), head_(src) {}
-
-	Ch Peek() const { return *src_; }
-	Ch Take() { return *src_++; }
-	size_t Tell() const { return src_ - head_; }
-
-	Ch* PutBegin() { RAPIDJSON_ASSERT(false); return 0; }
-	void Put(Ch) { RAPIDJSON_ASSERT(false); }
-	size_t PutEnd(Ch*) { RAPIDJSON_ASSERT(false); return 0; }
-
-	const Ch* src_;		//!< Current read position.
-	const Ch* head_;	//!< Original head of the string.
-};
-
-typedef GenericStringStream<UTF8<> > StringStream;
-
-///////////////////////////////////////////////////////////////////////////////
-// InsituStringStream
-
-//! A read-write string stream.
-/*! This string stream is particularly designed for in-situ parsing.
-	\implements Stream
-*/
-template <typename Encoding>
-struct GenericInsituStringStream {
-	typedef typename Encoding::Ch Ch;
-
-	GenericInsituStringStream(Ch *src) : src_(src), dst_(0), head_(src) {}
-
-	// Read
-	Ch Peek() { return *src_; }
-	Ch Take() { return *src_++; }
-	size_t Tell() { return src_ - head_; }
-
-	// Write
-	Ch* PutBegin() { return dst_ = src_; }
-	void Put(Ch c) { RAPIDJSON_ASSERT(dst_ != 0); *dst_++ = c; }
-	size_t PutEnd(Ch* begin) { return dst_ - begin; }
-
-	Ch* src_;
-	Ch* dst_;
-	Ch* head_;
-};
-
-typedef GenericInsituStringStream<UTF8<> > InsituStringStream;
-
-///////////////////////////////////////////////////////////////////////////////
-// Type
-
-//! Type of JSON value
-enum Type {
-	kNullType = 0,		//!< null
-	kFalseType = 1,		//!< false
-	kTrueType = 2,		//!< true
-	kObjectType = 3,	//!< object
-	kArrayType = 4,		//!< array 
-	kStringType = 5,	//!< string
-	kNumberType = 6,	//!< number
-};
-
-} // namespace rapidjson
-
-#endif // RAPIDJSON_RAPIDJSON_H_

third-party/rapidjson/stringbuffer.h

-#ifndef RAPIDJSON_STRINGBUFFER_H_
-#define RAPIDJSON_STRINGBUFFER_H_
-
-#include "rapidjson.h"
-#include "internal/stack.h"
-
-namespace rapidjson {
-
-//! Represents an in-memory output stream.
-/*!
-	\tparam Encoding Encoding of the stream.
-	\tparam Allocator type for allocating memory buffer.
-	\implements Stream
-*/
-template <typename Encoding, typename Allocator = CrtAllocator>
-struct GenericStringBuffer {
-	typedef typename Encoding::Ch Ch;
-
-	GenericStringBuffer(Allocator* allocator = 0, size_t capacity = kDefaultCapacity) : stack_(allocator, capacity) {}
-
-	void Put(Ch c) { *stack_.template Push<Ch>() = c; }
-
-	void Clear() { stack_.Clear(); }
-
-	const char* GetString() const {
-		// Push and pop a null terminator. This is safe.
-		*stack_.template Push<Ch>() = '\0';
-		stack_.template Pop<Ch>(1);
-
-		return stack_.template Bottom<Ch>();
-	}
-
-	size_t Size() const { return stack_.GetSize(); }
-
-	static const size_t kDefaultCapacity = 256;
-	mutable internal::Stack<Allocator> stack_;
-};
-
-typedef GenericStringBuffer<UTF8<> > StringBuffer;
-
-//! Implement specialized version of PutN() with memset() for better performance.
-template<>
-inline void PutN(GenericStringBuffer<UTF8<> >& stream, char c, size_t n) {
-	memset(stream.stack_.Push<char>(n), c, n * sizeof(c));
-}
-
-} // namespace rapidjson
-
-#endif // RAPIDJSON_STRINGBUFFER_H_