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Revert "Fbson to Json" 

This reverts commit 7ce1b2c19c.
This commit is contained in:
Igor Canadi 2015-02-18 13:14:53 -08:00
parent 7ce1b2c19c
commit b8ac71ba18
23 changed files with 3350 additions and 3280 deletions
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149
include/rocksdb/utilities/json_document.h
View File

@ -5,27 +5,15 @@
#pragma once
#ifndef ROCKSDB_LITE
#include <deque>
#include <map>
#include <memory>
#include <string>
#include <map>
#include <unordered_map>
#include <utility>
#include <vector>
#include "rocksdb/slice.h"
// We use JSONDocument for DocumentDB API
// 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
// Implementation inspired by folly::dynamic and rapidjson
namespace rocksdb {
@ -45,38 +33,52 @@ class JSONDocument {
kString,
};
/* implicit */ JSONDocument(); // null
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&& json_document);
~JSONDocument();
Type type() const;
// REQUIRES: IsObject()
bool Contains(const std::string& key) const;
// Returns nullptr if !Contains()
// don't delete the returned pointer
// REQUIRES: IsObject()
// Returns non-owner object
JSONDocument operator[](const std::string& key) const;
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);
// REQUIRES: IsArray() == true || IsObject() == true
size_t Count() const;
// REQUIRES: IsArray()
// Returns non-owner object
JSONDocument operator[](size_t i) const;
JSONDocument& operator=(JSONDocument jsonDocument);
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);
bool IsNull() const;
bool IsArray() const;
@ -93,16 +95,10 @@ class JSONDocument {
// REQUIRES: IsInt64() == true
int64_t GetInt64() const;
// REQUIRES: IsString() == true
std::string GetString() const;
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:
@ -118,42 +114,53 @@ class JSONDocument {
static JSONDocument* Deserialize(const Slice& src);
private:
friend class JSONDocumentBuilder;
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);
JSONDocument(fbson::FbsonValue* val, bool makeCopy);
void InitFromValue(const fbson::FbsonValue* val);
typedef std::vector<JSONDocument*> Array;
typedef std::unordered_map<std::string, JSONDocument*> Object;
// iteration on objects
class const_item_iterator {
private:
class Impl;
public:
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:
friend class ItemsIteratorGenerator;
std::unique_ptr<Impl> it_;
};
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_; }
private:
It it_;
};
class ItemsIteratorGenerator {
public:
/* implicit */ ItemsIteratorGenerator(const fbson::ObjectVal& object);
const_item_iterator begin() const;
const_item_iterator end() const;
/* implicit */ ItemsIteratorGenerator(const Object& object)
: object_(object) {}
const_item_iterator begin() { return object_.begin(); }
const_item_iterator end() { return object_.end(); }
private:
const fbson::ObjectVal& object_;
const Object& object_;
};
std::unique_ptr<char[]> data_;
mutable fbson::FbsonValue* value_;
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_;
// Our serialization format's first byte specifies the encoding version. That
// way, we can easily change our format while providing backwards
@ -162,34 +169,6 @@ 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

3
linters/lint_engine/FacebookFbcodeLintEngine.php
View File

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

768
third-party/fbson/FbsonDocument.h vendored
View File

@ -1,768 +0,0 @@
/*
* 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 defines FbsonDocument, FbsonKeyValue, and various value classes
* which are derived from FbsonValue, and a forward iterator for container
* values - essentially everything that is related to FBSON binary data
* structures.
*
* Implementation notes:
*
* None of the classes in this header file can be instantiated directly (i.e.
* you cannot create a FbsonKeyValue or FbsonValue object - all constructors
* are declared non-public). We use the classes as wrappers on the packed FBSON
* bytes (serialized), and cast the classes (types) to the underlying packed
* byte array.
*
* For the same reason, we cannot define any FBSON value class to be virtual,
* since we never call constructors, and will not instantiate vtbl and vptrs.
*
* Therefore, the classes are defined as packed structures (i.e. no data
* alignment and padding), and the private member variables of the classes are
* defined precisely in the same order as the FBSON spec. This ensures we
* access the packed FBSON bytes correctly.
*
* The packed structures are highly optimized for in-place operations with low
* overhead. The reads (and in-place writes) are performed directly on packed
* bytes. There is no memory allocation at all at runtime.
*
* For updates/writes of values that will expand the original FBSON size, the
* write will fail, and the caller needs to handle buffer increase.
*
* ** Iterator **
* Both ObjectVal class and ArrayVal class have iterator type that you can use
* to declare an iterator on a container object to go through the key-value
* pairs or value list. The iterator has both non-const and const types.
*
* Note: iterators are forward direction only.
*
* ** Query **
* Querying into containers is through the member functions find (for key/value
* pairs) and get (for array elements), and is in streaming style. We don't
* need to read/scan the whole FBSON packed bytes in order to return results.
* Once the key/index is found, we will stop search. You can use text to query
* both objects and array (for array, text will be converted to integer index),
* and use index to retrieve from array. Array index is 0-based.
*
* ** External dictionary **
* During query processing, you can also pass a call-back function, so the
* search will first try to check if the key string exists in the dictionary.
* If so, search will be based on the id instead of the key string.
*
* @author Tian Xia <tianx@fb.com>
*/
#ifndef FBSON_FBSONDOCUMENT_H
#define FBSON_FBSONDOCUMENT_H
#ifndef ROCKSDB_LITE
#include <string.h>
#include <assert.h>
namespace fbson {
#pragma pack(push, 1)
#define FBSON_VER 1
// forward declaration
class FbsonValue;
class ObjectVal;
/*
* FbsonDocument is the main object that accesses and queries FBSON packed
* bytes. NOTE: FbsonDocument only allows object container as the top level
* FBSON value. However, you can use the static method "createValue" to get any
* FbsonValue object from the packed bytes.
*
* FbsonDocument object also dereferences to an object container value
* (ObjectVal) once FBSON is loaded.
*
* ** Load **
* FbsonDocument is usable after loading packed bytes (memory location) into
* the object. We only need the header and first few bytes of the payload after
* header to verify the FBSON.
*
* Note: creating an FbsonDocument (through createDocument) does not allocate
* any memory. The document object is an efficient wrapper on the packed bytes
* which is accessed directly.
*
* ** Query **
* Query is through dereferencing into ObjectVal.
*/
class FbsonDocument {
public:
// create an FbsonDocument object from FBSON packed bytes
static FbsonDocument *createDocument(const char *pb, uint32_t size);
// create an FbsonValue from FBSON packed bytes
static FbsonValue *createValue(const char *pb, uint32_t size);
uint8_t version() { return header_.ver_; }
FbsonValue *getValue() { return ((FbsonValue *)payload_); }
ObjectVal *operator->() { return ((ObjectVal *)payload_); }
const ObjectVal *operator->() const { return ((const ObjectVal *)payload_); }
private:
/*
* FbsonHeader class defines FBSON header (internal to FbsonDocument).
*
* Currently it only contains version information (1-byte). We may expand the
* header to include checksum of the FBSON binary for more security.
*/
struct FbsonHeader {
uint8_t ver_;
} header_;
char payload_[0];
FbsonDocument();
};
/*
* FbsonFwdIteratorT implements FBSON's iterator template.
*
* Note: it is an FORWARD iterator only due to the design of FBSON format.
*/
template <class Iter_Type, class Cont_Type>
class FbsonFwdIteratorT {
typedef Iter_Type iterator;
typedef typename std::iterator_traits<Iter_Type>::pointer pointer;
typedef typename std::iterator_traits<Iter_Type>::reference reference;
public:
explicit FbsonFwdIteratorT(const iterator &i) : current_(i) {}
// allow non-const to const iterator conversion (same container type)
template <class Iter_Ty>
FbsonFwdIteratorT(const FbsonFwdIteratorT<Iter_Ty, Cont_Type> &rhs)
: current_(rhs.base()) {}
bool operator==(const FbsonFwdIteratorT &rhs) const {
return (current_ == rhs.current_);
}
bool operator!=(const FbsonFwdIteratorT &rhs) const {
return !operator==(rhs);
}
bool operator<(const FbsonFwdIteratorT &rhs) const {
return (current_ < rhs.current_);
}
bool operator>(const FbsonFwdIteratorT &rhs) const { return !operator<(rhs); }
FbsonFwdIteratorT &operator++() {
current_ = (iterator)(((char *)current_) + current_->numPackedBytes());
return *this;
}
FbsonFwdIteratorT operator++(int) {
auto tmp = *this;
current_ = (iterator)(((char *)current_) + current_->numPackedBytes());
return tmp;
}
explicit operator pointer() { return current_; }
reference operator*() const { return *current_; }
pointer operator->() const { return current_; }
iterator base() const { return current_; }
private:
iterator current_;
};
typedef int (*hDictInsert)(const char *key, unsigned len);
typedef int (*hDictFind)(const char *key, unsigned len);
/*
* FbsonType defines 10 primitive types and 2 container types, as described
* below.
*
* primitive_value ::=
* 0x00 //null value (0 byte)
* | 0x01 //boolean true (0 byte)
* | 0x02 //boolean false (0 byte)
* | 0x03 int8 //char/int8 (1 byte)
* | 0x04 int16 //int16 (2 bytes)
* | 0x05 int32 //int32 (4 bytes)
* | 0x06 int64 //int64 (8 bytes)
* | 0x07 double //floating point (8 bytes)
* | 0x08 string //variable length string
* | 0x09 binary //variable length binary
*
* container ::=
* 0x0A int32 key_value_list //object, int32 is the total bytes of the object
* | 0x0B int32 value_list //array, int32 is the total bytes of the array
*/
enum class FbsonType : char {
T_Null = 0x00,
T_True = 0x01,
T_False = 0x02,
T_Int8 = 0x03,
T_Int16 = 0x04,
T_Int32 = 0x05,
T_Int64 = 0x06,
T_Double = 0x07,
T_String = 0x08,
T_Binary = 0x09,
T_Object = 0x0A,
T_Array = 0x0B,
NUM_TYPES,
};
typedef std::underlying_type<FbsonType>::type FbsonTypeUnder;
/*
* FbsonKeyValue class defines FBSON key type, as described below.
*
* key ::=
* 0x00 int8 //1-byte dictionary id
* | int8 (byte*) //int8 (>0) is the size of the key string
*
* value ::= primitive_value | container
*
* FbsonKeyValue can be either an id mapping to the key string in an external
* dictionary, or it is the original key string. Whether to read an id or a
* string is decided by the first byte (size_).
*
* Note: a key object must be followed by a value object. Therefore, a key
* object implicitly refers to a key-value pair, and you can get the value
* object right after the key object. The function numPackedBytes hence
* indicates the total size of the key-value pair, so that we will be able go
* to next pair from the key.
*
* ** Dictionary size **
* By default, the dictionary size is 255 (1-byte). Users can define
* "USE_LARGE_DICT" to increase the dictionary size to 655535 (2-byte).
*/
class FbsonKeyValue {
public:
#ifdef USE_LARGE_DICT
static const int sMaxKeyId = 65535;
typedef uint16_t keyid_type;
#else
static const int sMaxKeyId = 255;
typedef uint8_t keyid_type;
#endif // #ifdef USE_LARGE_DICT
static const uint8_t sMaxKeyLen = 64;
// size of the key. 0 indicates it is stored as id
uint8_t klen() const { return size_; }
// get the key string. Note the string may not be null terminated.
const char *getKeyStr() const { return key_.str_; }
keyid_type getKeyId() const { return key_.id_; }
unsigned int keyPackedBytes() const {
return size_ ? (sizeof(size_) + size_)
: (sizeof(size_) + sizeof(keyid_type));
}
FbsonValue *value() const {
return (FbsonValue *)(((char *)this) + keyPackedBytes());
}
// size of the total packed bytes (key+value)
unsigned int numPackedBytes() const;
private:
uint8_t size_;
union key_ {
keyid_type id_;
char str_[1];
} key_;
FbsonKeyValue();
};
/*
* FbsonValue is the base class of all FBSON types. It contains only one member
* variable - type info, which can be retrieved by member functions is[Type]()
* or type().
*/
class FbsonValue {
public:
static const uint32_t sMaxValueLen = 1 << 24; // 16M
bool isNull() const { return (type_ == FbsonType::T_Null); }
bool isTrue() const { return (type_ == FbsonType::T_True); }
bool isFalse() const { return (type_ == FbsonType::T_False); }
bool isInt8() const { return (type_ == FbsonType::T_Int8); }
bool isInt16() const { return (type_ == FbsonType::T_Int16); }
bool isInt32() const { return (type_ == FbsonType::T_Int32); }
bool isInt64() const { return (type_ == FbsonType::T_Int64); }
bool isDouble() const { return (type_ == FbsonType::T_Double); }
bool isString() const { return (type_ == FbsonType::T_String); }
bool isBinary() const { return (type_ == FbsonType::T_Binary); }
bool isObject() const { return (type_ == FbsonType::T_Object); }
bool isArray() const { return (type_ == FbsonType::T_Array); }
FbsonType type() const { return type_; }
// size of the total packed bytes
unsigned int numPackedBytes() const;
// size of the value in bytes
unsigned int size() const;
// get the raw byte array of the value
const char *getValuePtr() const;
protected:
FbsonType type_; // type info
FbsonValue();
};
/*
* NumerValT is the template class (derived from FbsonValue) of all number
* types (integers and double).
*/
template <class T>
class NumberValT : public FbsonValue {
public:
T val() const { return num_; }
unsigned int numPackedBytes() const { return sizeof(FbsonValue) + sizeof(T); }
// catch all unknow specialization of the template class
bool setVal(T value) { return false; }
private:
T num_;
NumberValT();
};
typedef NumberValT<int8_t> Int8Val;
// override setVal for Int8Val
template <>
inline bool Int8Val::setVal(int8_t value) {
if (!isInt8()) {
return false;
}
num_ = value;
return true;
}
typedef NumberValT<int16_t> Int16Val;
// override setVal for Int16Val
template <>
inline bool Int16Val::setVal(int16_t value) {
if (!isInt16()) {
return false;
}
num_ = value;
return true;
}
typedef NumberValT<int32_t> Int32Val;
// override setVal for Int32Val
template <>
inline bool Int32Val::setVal(int32_t value) {
if (!isInt32()) {
return false;
}
num_ = value;
return true;
}
typedef NumberValT<int64_t> Int64Val;
// override setVal for Int64Val
template <>
inline bool Int64Val::setVal(int64_t value) {
if (!isInt64()) {
return false;
}
num_ = value;
return true;
}
typedef NumberValT<double> DoubleVal;
// override setVal for DoubleVal
template <>
inline bool DoubleVal::setVal(double value) {
if (!isDouble()) {
return false;
}
num_ = value;
return true;
}
/*
* BlobVal is the base class (derived from FbsonValue) for string and binary
* types. The size_ indicates the total bytes of the payload_.
*/
class BlobVal : public FbsonValue {
public:
// size of the blob payload only
unsigned int getBlobLen() const { return size_; }
// return the blob as byte array
const char *getBlob() const { return payload_; }
// size of the total packed bytes
unsigned int numPackedBytes() const {
return sizeof(FbsonValue) + sizeof(size_) + size_;
}
protected:
uint32_t size_;
char payload_[0];
// set new blob bytes
bool internalSetVal(const char *blob, uint32_t blobSize) {
// if we cannot fit the new blob, fail the operation
if (blobSize > size_) {
return false;
}
memcpy(payload_, blob, blobSize);
// Set the reset of the bytes to 0. Note we cannot change the size_ of the
// current payload, as all values are packed.
memset(payload_ + blobSize, 0, size_ - blobSize);
return true;
}
BlobVal();
};
/*
* Binary type
*/
class BinaryVal : public BlobVal {
public:
bool setVal(const char *blob, uint32_t blobSize) {
if (!isBinary()) {
return false;
}
return internalSetVal(blob, blobSize);
}
private:
BinaryVal();
};
/*
* String type
* Note: FBSON string may not be a c-string (NULL-terminated)
*/
class StringVal : public BlobVal {
public:
bool setVal(const char *str, uint32_t blobSize) {
if (!isString()) {
return false;
}
return internalSetVal(str, blobSize);
}
private:
StringVal();
};
/*
* ContainerVal is the base class (derived from FbsonValue) for object and
* array types. The size_ indicates the total bytes of the payload_.
*/
class ContainerVal : public FbsonValue {
public:
// size of the container payload only
unsigned int getContainerSize() const { return size_; }
// return the container payload as byte array
const char *getPayload() const { return payload_; }
// size of the total packed bytes
unsigned int numPackedBytes() const {
return sizeof(FbsonValue) + sizeof(size_) + size_;
}
protected:
uint32_t size_;
char payload_[0];
ContainerVal();
};
/*
* Object type
*/
class ObjectVal : public ContainerVal {
public:
// find the FBSON value by a key string
FbsonValue *find(const char *key, hDictFind handler = nullptr) const {
int key_id = -1;
unsigned int klen = strlen(key);
if (handler && (key_id = handler(key, klen)) >= 0) {
return find(key_id);
}
const char *pch = payload_;
const char *fence = payload_ + size_;
while (pch < fence) {
FbsonKeyValue *pkey = (FbsonKeyValue *)(pch);
if (klen == pkey->klen() && strncmp(key, pkey->getKeyStr(), klen) == 0) {
return pkey->value();
}
pch += pkey->numPackedBytes();
}
assert(pch == fence);
return nullptr;
}
// find the FBSON value by a key dictionary ID
FbsonValue *find(int key_id) const {
if (key_id < 0 || key_id > FbsonKeyValue::sMaxKeyId)
return nullptr;
const char *pch = payload_;
const char *fence = payload_ + size_;
while (pch < fence) {
FbsonKeyValue *pkey = (FbsonKeyValue *)(pch);
if (!pkey->klen() && key_id == pkey->getKeyId()) {
return pkey->value();
}
pch += pkey->numPackedBytes();
}
assert(pch == fence);
return nullptr;
}
typedef FbsonKeyValue value_type;
typedef value_type *pointer;
typedef const value_type *const_pointer;
typedef FbsonFwdIteratorT<pointer, ObjectVal> iterator;
typedef FbsonFwdIteratorT<const_pointer, ObjectVal> const_iterator;
iterator begin() { return iterator((pointer)payload_); }
const_iterator begin() const { return const_iterator((pointer)payload_); }
iterator end() { return iterator((pointer)(payload_ + size_)); }
const_iterator end() const {
return const_iterator((pointer)(payload_ + size_));
}
private:
ObjectVal();
};
/*
* Array type
*/
class ArrayVal : public ContainerVal {
public:
// get the FBSON value at index
FbsonValue *get(int idx) const {
if (idx < 0)
return nullptr;
const char *pch = payload_;
const char *fence = payload_ + size_;
while (pch < fence && idx-- > 0)
pch += ((FbsonValue *)pch)->numPackedBytes();
if (idx == -1)
return (FbsonValue *)pch;
else {
assert(pch == fence);
return nullptr;
}
}
// Get number of elements in array
unsigned int numElem() const {
const char *pch = payload_;
const char *fence = payload_ + size_;
unsigned int num = 0;
while (pch < fence) {
++num;
pch += ((FbsonValue *)pch)->numPackedBytes();
}
assert(pch == fence);
return num;
}
typedef FbsonValue value_type;
typedef value_type *pointer;
typedef const value_type *const_pointer;
typedef FbsonFwdIteratorT<pointer, ArrayVal> iterator;
typedef FbsonFwdIteratorT<const_pointer, ArrayVal> const_iterator;
iterator begin() { return iterator((pointer)payload_); }
const_iterator begin() const { return const_iterator((pointer)payload_); }
iterator end() { return iterator((pointer)(payload_ + size_)); }
const_iterator end() const {
return const_iterator((pointer)(payload_ + size_));
}
private:
ArrayVal();
};
inline FbsonDocument *FbsonDocument::createDocument(const char *pb,
uint32_t size) {
if (!pb || size < sizeof(FbsonHeader) + sizeof(FbsonValue)) {
return nullptr;
}
FbsonDocument *doc = (FbsonDocument *)pb;
if (doc->header_.ver_ != FBSON_VER) {
return nullptr;
}
FbsonValue *val = (FbsonValue *)doc->payload_;
if (!val->isObject() || size != sizeof(FbsonHeader) + val->numPackedBytes()) {
return nullptr;
}
return doc;
}
inline FbsonValue *FbsonDocument::createValue(const char *pb, uint32_t size) {
if (!pb || size < sizeof(FbsonHeader) + sizeof(FbsonValue)) {
return nullptr;
}
FbsonDocument *doc = (FbsonDocument *)pb;
if (doc->header_.ver_ != FBSON_VER) {
return nullptr;
}
FbsonValue *val = (FbsonValue *)doc->payload_;
if (size != sizeof(FbsonHeader) + val->numPackedBytes()) {
return nullptr;
}
return val;
}
inline unsigned int FbsonKeyValue::numPackedBytes() const {
unsigned int ks = keyPackedBytes();
FbsonValue *val = (FbsonValue *)(((char *)this) + ks);
return ks + val->numPackedBytes();
}
// Poor man's "virtual" function FbsonValue::numPackedBytes
inline unsigned int FbsonValue::numPackedBytes() const {
switch (type_) {
case FbsonType::T_Null:
case FbsonType::T_True:
case FbsonType::T_False: { return sizeof(type_); }
case FbsonType::T_Int8: { return sizeof(type_) + sizeof(int8_t); }
case FbsonType::T_Int16: { return sizeof(type_) + sizeof(int16_t); }
case FbsonType::T_Int32: { return sizeof(type_) + sizeof(int32_t); }
case FbsonType::T_Int64: { return sizeof(type_) + sizeof(int64_t); }
case FbsonType::T_Double: { return sizeof(type_) + sizeof(double); }
case FbsonType::T_String:
case FbsonType::T_Binary: { return ((BlobVal *)(this))->numPackedBytes(); }
case FbsonType::T_Object:
case FbsonType::T_Array: {
return ((ContainerVal *)(this))->numPackedBytes();
}
default:
return 0;
}
}
inline unsigned int FbsonValue::size() const {
switch (type_) {
case FbsonType::T_Int8: { return sizeof(int8_t); }
case FbsonType::T_Int16: { return sizeof(int16_t); }
case FbsonType::T_Int32: { return sizeof(int32_t); }
case FbsonType::T_Int64: { return sizeof(int64_t); }
case FbsonType::T_Double: { return sizeof(double); }
case FbsonType::T_String:
case FbsonType::T_Binary: { return ((BlobVal *)(this))->getBlobLen(); }
case FbsonType::T_Object:
case FbsonType::T_Array: {
return ((ContainerVal *)(this))->getContainerSize();
}
case FbsonType::T_Null:
case FbsonType::T_True:
case FbsonType::T_False:
default:
return 0;
}
}
inline const char *FbsonValue::getValuePtr() const {
switch (type_) {
case FbsonType::T_Int8:
case FbsonType::T_Int16:
case FbsonType::T_Int32:
case FbsonType::T_Int64:
case FbsonType::T_Double:
return ((char *)this) + sizeof(FbsonType);
case FbsonType::T_String:
case FbsonType::T_Binary:
return ((BlobVal *)(this))->getBlob();
case FbsonType::T_Object:
case FbsonType::T_Array:
return ((ContainerVal *)(this))->getPayload();
case FbsonType::T_Null:
case FbsonType::T_True:
case FbsonType::T_False:
default:
return nullptr;
}
}
#pragma pack(pop)
} // namespace fbson
#endif // ROCKSDB_LITE
#endif // FBSON_FBSONDOCUMENT_H

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@ -1,748 +0,0 @@
/*
* 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

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/*
* 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

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/*
* 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

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/*
* 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

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#ifndef RAPIDJSON_DOCUMENT_H_
#define RAPIDJSON_DOCUMENT_H_
#include "reader.h"
#include "internal/strfunc.h"
#include <new> // placement new
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4127) // conditional expression is constant
#endif
namespace rapidjson {
///////////////////////////////////////////////////////////////////////////////
// GenericValue
//! Represents a JSON value. Use Value for UTF8 encoding and default allocator.
/*!
A JSON value can be one of 7 types. This class is a variant type supporting
these types.
Use the Value if UTF8 and default allocator
\tparam Encoding Encoding of the value. (Even non-string values need to have the same encoding in a document)
\tparam Allocator Allocator type for allocating memory of object, array and string.
*/
#pragma pack (push, 4)
template <typename Encoding, typename Allocator = MemoryPoolAllocator<> >
class GenericValue {
public:
//! Name-value pair in an object.
struct Member {
GenericValue<Encoding, Allocator> name; //!< name of member (must be a string)
GenericValue<Encoding, Allocator> value; //!< value of member.
};
typedef Encoding EncodingType; //!< Encoding type from template parameter.
typedef Allocator AllocatorType; //!< Allocator type from template parameter.
typedef typename Encoding::Ch Ch; //!< Character type derived from Encoding.
typedef Member* MemberIterator; //!< Member iterator for iterating in object.
typedef const Member* ConstMemberIterator; //!< Constant member iterator for iterating in object.
typedef GenericValue* ValueIterator; //!< Value iterator for iterating in array.
typedef const GenericValue* ConstValueIterator; //!< Constant value iterator for iterating in array.
//!@name Constructors and destructor.
//@{
//! Default constructor creates a null value.
GenericValue() : flags_(kNullFlag) {}
//! Copy constructor is not permitted.
private:
GenericValue(const GenericValue& rhs);
public:
//! Constructor with JSON value type.
/*! This creates a Value of specified type with default content.
\param type Type of the value.
\note Default content for number is zero.
*/
GenericValue(Type type) {
static const unsigned defaultFlags[7] = {
kNullFlag, kFalseFlag, kTrueFlag, kObjectFlag, kArrayFlag, kConstStringFlag,
kNumberFlag | kIntFlag | kUintFlag | kInt64Flag | kUint64Flag | kDoubleFlag
};
RAPIDJSON_ASSERT(type <= kNumberType);
flags_ = defaultFlags[type];
memset(&data_, 0, sizeof(data_));
}
//! Constructor for boolean value.
GenericValue(bool b) : flags_(b ? kTrueFlag : kFalseFlag) {}
//! Constructor for int value.
GenericValue(int i) : flags_(kNumberIntFlag) {
data_.n.i64 = i;
if (i >= 0)
flags_ |= kUintFlag | kUint64Flag;
}
//! Constructor for unsigned value.
GenericValue(unsigned u) : flags_(kNumberUintFlag) {
data_.n.u64 = u;
if (!(u & 0x80000000))
flags_ |= kIntFlag | kInt64Flag;
}
//! Constructor for int64_t value.
GenericValue(int64_t i64) : flags_(kNumberInt64Flag) {
data_.n.i64 = i64;
if (i64 >= 0) {
flags_ |= kNumberUint64Flag;
if (!(i64 & 0xFFFFFFFF00000000LL))
flags_ |= kUintFlag;
if (!(i64 & 0xFFFFFFFF80000000LL))
flags_ |= kIntFlag;
}
else if (i64 >= -2147483648LL)
flags_ |= kIntFlag;
}
//! Constructor for uint64_t value.
GenericValue(uint64_t u64) : flags_(kNumberUint64Flag) {
data_.n.u64 = u64;
if (!(u64 & 0x8000000000000000ULL))
flags_ |= kInt64Flag;
if (!(u64 & 0xFFFFFFFF00000000ULL))
flags_ |= kUintFlag;
if (!(u64 & 0xFFFFFFFF80000000ULL))
flags_ |= kIntFlag;
}
//! Constructor for double value.
GenericValue(double d) : flags_(kNumberDoubleFlag) { data_.n.d = d; }
//! Constructor for constant string (i.e. do not make a copy of string)
GenericValue(const Ch* s, SizeType length) {
RAPIDJSON_ASSERT(s != NULL);
flags_ = kConstStringFlag;
data_.s.str = s;
data_.s.length = length;
}
//! Constructor for constant string (i.e. do not make a copy of string)
GenericValue(const Ch* s) { SetStringRaw(s, internal::StrLen(s)); }
//! Constructor for copy-string (i.e. do make a copy of string)
GenericValue(const Ch* s, SizeType length, Allocator& allocator) { SetStringRaw(s, length, allocator); }
//! Constructor for copy-string (i.e. do make a copy of string)
GenericValue(const Ch*s, Allocator& allocator) { SetStringRaw(s, internal::StrLen(s), allocator); }
//! Destructor.
/*! Need to destruct elements of array, members of object, or copy-string.
*/
~GenericValue() {
if (Allocator::kNeedFree) { // Shortcut by Allocator's trait
switch(flags_) {
case kArrayFlag:
for (GenericValue* v = data_.a.elements; v != data_.a.elements + data_.a.size; ++v)
v->~GenericValue();
Allocator::Free(data_.a.elements);
break;
case kObjectFlag:
for (Member* m = data_.o.members; m != data_.o.members + data_.o.size; ++m) {
m->name.~GenericValue();
m->value.~GenericValue();
}
Allocator::Free(data_.o.members);
break;
case kCopyStringFlag:
Allocator::Free(const_cast<Ch*>(data_.s.str));
break;
}
}
}
//@}
//!@name Assignment operators
//@{
//! Assignment with move semantics.
/*! \param rhs Source of the assignment. It will become a null value after assignment.
*/
GenericValue& operator=(GenericValue& rhs) {
RAPIDJSON_ASSERT(this != &rhs);
this->~GenericValue();
memcpy(this, &rhs, sizeof(GenericValue));
rhs.flags_ = kNullFlag;
return *this;
}
//! Assignment with primitive types.
/*! \tparam T Either Type, int, unsigned, int64_t, uint64_t, const Ch*
\param value The value to be assigned.
*/
template <typename T>
GenericValue& operator=(T value) {
this->~GenericValue();
new (this) GenericValue(value);
return *this;
}
//@}
//!@name Type
//@{
Type GetType() const { return static_cast<Type>(flags_ & kTypeMask); }
bool IsNull() const { return flags_ == kNullFlag; }
bool IsFalse() const { return flags_ == kFalseFlag; }
bool IsTrue() const { return flags_ == kTrueFlag; }
bool IsBool() const { return (flags_ & kBoolFlag) != 0; }
bool IsObject() const { return flags_ == kObjectFlag; }
bool IsArray() const { return flags_ == kArrayFlag; }
bool IsNumber() const { return (flags_ & kNumberFlag) != 0; }
bool IsInt() const { return (flags_ & kIntFlag) != 0; }
bool IsUint() const { return (flags_ & kUintFlag) != 0; }
bool IsInt64() const { return (flags_ & kInt64Flag) != 0; }
bool IsUint64() const { return (flags_ & kUint64Flag) != 0; }
bool IsDouble() const { return (flags_ & kDoubleFlag) != 0; }
bool IsString() const { return (flags_ & kStringFlag) != 0; }
//@}
//!@name Null
//@{
GenericValue& SetNull() { this->~GenericValue(); new (this) GenericValue(); return *this; }
//@}
//!@name Bool
//@{
bool GetBool() const { RAPIDJSON_ASSERT(IsBool()); return flags_ == kTrueFlag; }
GenericValue& SetBool(bool b) { this->~GenericValue(); new (this) GenericValue(b); return *this; }
//@}
//!@name Object
//@{
//! Set this value as an empty object.
GenericValue& SetObject() { this->~GenericValue(); new (this) GenericValue(kObjectType); return *this; }
//! Get the value associated with the object's name.
GenericValue& operator[](const Ch* name) {
if (Member* member = FindMember(name))
return member->value;
else {
static GenericValue NullValue;
return NullValue;
}
}
const GenericValue& operator[](const Ch* name) const { return const_cast<GenericValue&>(*this)[name]; }
//! Member iterators.
ConstMemberIterator MemberBegin() const { RAPIDJSON_ASSERT(IsObject()); return data_.o.members; }
ConstMemberIterator MemberEnd() const { RAPIDJSON_ASSERT(IsObject()); return data_.o.members + data_.o.size; }
MemberIterator MemberBegin() { RAPIDJSON_ASSERT(IsObject()); return data_.o.members; }
MemberIterator MemberEnd() { RAPIDJSON_ASSERT(IsObject()); return data_.o.members + data_.o.size; }
//! Check whether a member exists in the object.
bool HasMember(const Ch* name) const { return FindMember(name) != 0; }
//! Add a member (name-value pair) to the object.
/*! \param name A string value as name of member.
\param value Value of any type.
\param allocator Allocator for reallocating memory.
\return The value itself for fluent API.
\note The ownership of name and value will be transfered to this object if success.
*/
GenericValue& AddMember(GenericValue& name, GenericValue& value, Allocator& allocator) {
RAPIDJSON_ASSERT(IsObject());
RAPIDJSON_ASSERT(name.IsString());
Object& o = data_.o;
if (o.size >= o.capacity) {
if (o.capacity == 0) {
o.capacity = kDefaultObjectCapacity;
o.members = (Member*)allocator.Malloc(o.capacity * sizeof(Member));
}
else {
SizeType oldCapacity = o.capacity;
o.capacity *= 2;
o.members = (Member*)allocator.Realloc(o.members, oldCapacity * sizeof(Member), o.capacity * sizeof(Member));
}
}
o.members[o.size].name.RawAssign(name);
o.members[o.size].value.RawAssign(value);
o.size++;
return *this;
}
GenericValue& AddMember(const Ch* name, Allocator& nameAllocator, GenericValue& value, Allocator& allocator) {
GenericValue n(name, internal::StrLen(name), nameAllocator);
return AddMember(n, value, allocator);
}
GenericValue& AddMember(const Ch* name, GenericValue& value, Allocator& allocator) {
GenericValue n(name, internal::StrLen(name));
return AddMember(n, value, allocator);
}
template <typename T>
GenericValue& AddMember(const Ch* name, T value, Allocator& allocator) {
GenericValue n(name, internal::StrLen(name));
GenericValue v(value);
return AddMember(n, v, allocator);
}
//! Remove a member in object by its name.
/*! \param name Name of member to be removed.
\return Whether the member existed.
\note Removing member is implemented by moving the last member. So the ordering of members is changed.
*/
bool RemoveMember(const Ch* name) {
RAPIDJSON_ASSERT(IsObject());
if (Member* m = FindMember(name)) {
RAPIDJSON_ASSERT(data_.o.size > 0);
RAPIDJSON_ASSERT(data_.o.members != 0);
Member* last = data_.o.members + (data_.o.size - 1);
if (data_.o.size > 1 && m != last) {
// Move the last one to this place
m->name = last->name;
m->value = last->value;
}
else {
// Only one left, just destroy
m->name.~GenericValue();
m->value.~GenericValue();
}
--data_.o.size;
return true;
}
return false;
}
//@}
//!@name Array
//@{
//! Set this value as an empty array.
GenericValue& SetArray() { this->~GenericValue(); new (this) GenericValue(kArrayType); return *this; }
//! Get the number of elements in array.
SizeType Size() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.size; }
//! Get the capacity of array.
SizeType Capacity() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.capacity; }
//! Check whether the array is empty.
bool Empty() const { RAPIDJSON_ASSERT(IsArray()); return data_.a.size == 0; }
//! Remove all elements in the array.
/*! This function do not deallocate memory in the array, i.e. the capacity is unchanged.
*/
void Clear() {
RAPIDJSON_ASSERT(IsArray());
for (SizeType i = 0; i < data_.a.size; ++i)
data_.a.elements[i].~GenericValue();
data_.a.size = 0;
}
//! Get an element from array by index.
/*! \param index Zero-based index of element.
\note
\code
Value a(kArrayType);
a.PushBack(123);
int x = a[0].GetInt(); // Error: operator[ is ambiguous, as 0 also mean a null pointer of const char* type.
int y = a[SizeType(0)].GetInt(); // Cast to SizeType will work.
int z = a[0u].GetInt(); // This works too.
\endcode
*/
GenericValue& operator[](SizeType index) {
RAPIDJSON_ASSERT(IsArray());
RAPIDJSON_ASSERT(index < data_.a.size);
return data_.a.elements[index];
}
const GenericValue& operator[](SizeType index) const { return const_cast<GenericValue&>(*this)[index]; }
//! Element iterator
ValueIterator Begin() { RAPIDJSON_ASSERT(IsArray()); return data_.a.elements; }
ValueIterator End() { RAPIDJSON_ASSERT(IsArray()); return data_.a.elements + data_.a.size; }
ConstValueIterator Begin() const { return const_cast<GenericValue&>(*this).Begin(); }
ConstValueIterator End() const { return const_cast<GenericValue&>(*this).End(); }
//! Request the array to have enough capacity to store elements.
/*! \param newCapacity The capacity that the array at least need to have.
\param allocator The allocator for allocating memory. It must be the same one use previously.
\return The value itself for fluent API.
*/
GenericValue& Reserve(SizeType newCapacity, Allocator &allocator) {
RAPIDJSON_ASSERT(IsArray());
if (newCapacity > data_.a.capacity) {
data_.a.elements = (GenericValue*)allocator.Realloc(data_.a.elements, data_.a.capacity * sizeof(GenericValue), newCapacity * sizeof(GenericValue));
data_.a.capacity = newCapacity;
}
return *this;
}
//! Append a value at the end of the array.
/*! \param value The value to be appended.
\param allocator The allocator for allocating memory. It must be the same one use previously.
\return The value itself for fluent API.
\note The ownership of the value will be transfered to this object if success.
\note If the number of elements to be appended is known, calls Reserve() once first may be more efficient.
*/
GenericValue& PushBack(GenericValue& value, Allocator& allocator) {
RAPIDJSON_ASSERT(IsArray());
if (data_.a.size >= data_.a.capacity)
Reserve(data_.a.capacity == 0 ? kDefaultArrayCapacity : data_.a.capacity * 2, allocator);
data_.a.elements[data_.a.size++].RawAssign(value);
return *this;
}
template <typename T>
GenericValue& PushBack(T value, Allocator& allocator) {
GenericValue v(value);
return PushBack(v, allocator);
}
//! Remove the last element in the array.
GenericValue& PopBack() {
RAPIDJSON_ASSERT(IsArray());
RAPIDJSON_ASSERT(!Empty());
data_.a.elements[--data_.a.size].~GenericValue();
return *this;
}
//@}
//!@name Number
//@{
int GetInt() const { RAPIDJSON_ASSERT(flags_ & kIntFlag); return data_.n.i.i; }
unsigned GetUint() const { RAPIDJSON_ASSERT(flags_ & kUintFlag); return data_.n.u.u; }
int64_t GetInt64() const { RAPIDJSON_ASSERT(flags_ & kInt64Flag); return data_.n.i64; }
uint64_t GetUint64() const { RAPIDJSON_ASSERT(flags_ & kUint64Flag); return data_.n.u64; }
double GetDouble() const {
RAPIDJSON_ASSERT(IsNumber());
if ((flags_ & kDoubleFlag) != 0) return data_.n.d; // exact type, no conversion.
if ((flags_ & kIntFlag) != 0) return data_.n.i.i; // int -> double
if ((flags_ & kUintFlag) != 0) return data_.n.u.u; // unsigned -> double
if ((flags_ & kInt64Flag) != 0) return (double)data_.n.i64; // int64_t -> double (may lose precision)
RAPIDJSON_ASSERT((flags_ & kUint64Flag) != 0); return (double)data_.n.u64; // uint64_t -> double (may lose precision)
}
GenericValue& SetInt(int i) { this->~GenericValue(); new (this) GenericValue(i); return *this; }
GenericValue& SetUint(unsigned u) { this->~GenericValue(); new (this) GenericValue(u); return *this; }
GenericValue& SetInt64(int64_t i64) { this->~GenericValue(); new (this) GenericValue(i64); return *this; }
GenericValue& SetUint64(uint64_t u64) { this->~GenericValue(); new (this) GenericValue(u64); return *this; }
GenericValue& SetDouble(double d) { this->~GenericValue(); new (this) GenericValue(d); return *this; }
//@}
//!@name String
//@{
const Ch* GetString() const { RAPIDJSON_ASSERT(IsString()); return data_.s.str; }
//! Get the length of string.
/*! Since rapidjson permits "\u0000" in the json string, strlen(v.GetString()) may not equal to v.GetStringLength().
*/
SizeType GetStringLength() const { RAPIDJSON_ASSERT(IsString()); return data_.s.length; }
//! Set this value as a string without copying source string.
/*! This version has better performance with supplied length, and also support string containing null character.
\param s source string pointer.
\param length The length of source string, excluding the trailing null terminator.
\return The value itself for fluent API.
*/
GenericValue& SetString(const Ch* s, SizeType length) { this->~GenericValue(); SetStringRaw(s, length); return *this; }
//! Set this value as a string without copying source string.
/*! \param s source string pointer.
\return The value itself for fluent API.
*/
GenericValue& SetString(const Ch* s) { return SetString(s, internal::StrLen(s)); }
//! Set this value as a string by copying from source string.
/*! This version has better performance with supplied length, and also support string containing null character.
\param s source string.
\param length The length of source string, excluding the trailing null terminator.
\param allocator Allocator for allocating copied buffer. Commonly use document.GetAllocator().
\return The value itself for fluent API.
*/
GenericValue& SetString(const Ch* s, SizeType length, Allocator& allocator) { this->~GenericValue(); SetStringRaw(s, length, allocator); return *this; }
//! Set this value as a string by copying from source string.
/*! \param s source string.
\param allocator Allocator for allocating copied buffer. Commonly use document.GetAllocator().
\return The value itself for fluent API.
*/
GenericValue& SetString(const Ch* s, Allocator& allocator) { SetString(s, internal::StrLen(s), allocator); return *this; }
//@}
//! Generate events of this value to a Handler.
/*! This function adopts the GoF visitor pattern.
Typical usage is to output this JSON value as JSON text via Writer, which is a Handler.
It can also be used to deep clone this value via GenericDocument, which is also a Handler.
\tparam Handler type of handler.
\param handler An object implementing concept Handler.
*/
template <typename Handler>
const GenericValue& Accept(Handler& handler) const {
switch(GetType()) {
case kNullType: handler.Null(); break;
case kFalseType: handler.Bool(false); break;
case kTrueType: handler.Bool(true); break;
case kObjectType:
handler.StartObject();
for (Member* m = data_.o.members; m != data_.o.members + data_.o.size; ++m) {
handler.String(m->name.data_.s.str, m->name.data_.s.length, false);
m->value.Accept(handler);
}
handler.EndObject(data_.o.size);
break;
case kArrayType:
handler.StartArray();
for (GenericValue* v = data_.a.elements; v != data_.a.elements + data_.a.size; ++v)
v->Accept(handler);
handler.EndArray(data_.a.size);
break;
case kStringType:
handler.String(data_.s.str, data_.s.length, false);
break;
case kNumberType:
if (IsInt()) handler.Int(data_.n.i.i);
else if (IsUint()) handler.Uint(data_.n.u.u);
else if (IsInt64()) handler.Int64(data_.n.i64);
else if (IsUint64()) handler.Uint64(data_.n.u64);
else handler.Double(data_.n.d);
break;
}
return *this;
}
private:
template <typename, typename>
friend class GenericDocument;
enum {
kBoolFlag = 0x100,
kNumberFlag = 0x200,
kIntFlag = 0x400,
kUintFlag = 0x800,
kInt64Flag = 0x1000,
kUint64Flag = 0x2000,
kDoubleFlag = 0x4000,
kStringFlag = 0x100000,
kCopyFlag = 0x200000,
// Initial flags of different types.
kNullFlag = kNullType,
kTrueFlag = kTrueType | kBoolFlag,
kFalseFlag = kFalseType | kBoolFlag,
kNumberIntFlag = kNumberType | kNumberFlag | kIntFlag | kInt64Flag,
kNumberUintFlag = kNumberType | kNumberFlag | kUintFlag | kUint64Flag | kInt64Flag,
kNumberInt64Flag = kNumberType | kNumberFlag | kInt64Flag,
kNumberUint64Flag = kNumberType | kNumberFlag | kUint64Flag,
kNumberDoubleFlag = kNumberType | kNumberFlag | kDoubleFlag,
kConstStringFlag = kStringType | kStringFlag,
kCopyStringFlag = kStringType | kStringFlag | kCopyFlag,
kObjectFlag = kObjectType,
kArrayFlag = kArrayType,
kTypeMask = 0xFF // bitwise-and with mask of 0xFF can be optimized by compiler
};
static const SizeType kDefaultArrayCapacity = 16;
static const SizeType kDefaultObjectCapacity = 16;
struct String {
const Ch* str;
SizeType length;
unsigned hashcode; //!< reserved
}; // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
// By using proper binary layout, retrieval of different integer types do not need conversions.
union Number {
#if RAPIDJSON_ENDIAN == RAPIDJSON_LITTLEENDIAN
struct I {
int i;
char padding[4];
}i;
struct U {
unsigned u;
char padding2[4];
}u;
#else
struct I {
char padding[4];
int i;
}i;
struct U {
char padding2[4];
unsigned u;
}u;
#endif
int64_t i64;
uint64_t u64;
double d;
}; // 8 bytes
struct Object {
Member* members;
SizeType size;
SizeType capacity;
}; // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
struct Array {
GenericValue<Encoding, Allocator>* elements;
SizeType size;
SizeType capacity;
}; // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
union Data {
String s;
Number n;
Object o;
Array a;
}; // 12 bytes in 32-bit mode, 16 bytes in 64-bit mode
//! Find member by name.
Member* FindMember(const Ch* name) {
RAPIDJSON_ASSERT(name);
RAPIDJSON_ASSERT(IsObject());
SizeType length = internal::StrLen(name);
Object& o = data_.o;
for (Member* member = o.members; member != data_.o.members + data_.o.size; ++member)
if (length == member->name.data_.s.length && memcmp(member->name.data_.s.str, name, length * sizeof(Ch)) == 0)
return member;
return 0;
}
const Member* FindMember(const Ch* name) const { return const_cast<GenericValue&>(*this).FindMember(name); }
// Initialize this value as array with initial data, without calling destructor.
void SetArrayRaw(GenericValue* values, SizeType count, Allocator& alloctaor) {
flags_ = kArrayFlag;
data_.a.elements = (GenericValue*)alloctaor.Malloc(count * sizeof(GenericValue));
memcpy(data_.a.elements, values, count * sizeof(GenericValue));
data_.a.size = data_.a.capacity = count;
}
//! Initialize this value as object with initial data, without calling destructor.
void SetObjectRaw(Member* members, SizeType count, Allocator& alloctaor) {
flags_ = kObjectFlag;
data_.o.members = (Member*)alloctaor.Malloc(count * sizeof(Member));
memcpy(data_.o.members, members, count * sizeof(Member));
data_.o.size = data_.o.capacity = count;
}
//! Initialize this value as constant string, without calling destructor.
void SetStringRaw(const Ch* s, SizeType length) {
RAPIDJSON_ASSERT(s != NULL);
flags_ = kConstStringFlag;
data_.s.str = s;
data_.s.length = length;
}
//! Initialize this value as copy string with initial data, without calling destructor.
void SetStringRaw(const Ch* s, SizeType length, Allocator& allocator) {
RAPIDJSON_ASSERT(s != NULL);
flags_ = kCopyStringFlag;
data_.s.str = (Ch *)allocator.Malloc((length + 1) * sizeof(Ch));
data_.s.length = length;
memcpy(const_cast<Ch*>(data_.s.str), s, length * sizeof(Ch));
const_cast<Ch*>(data_.s.str)[length] = '\0';
}
//! Assignment without calling destructor
void RawAssign(GenericValue& rhs) {
memcpy(this, &rhs, sizeof(GenericValue));
rhs.flags_ = kNullFlag;
}
Data data_;
unsigned flags_;
};
#pragma pack (pop)
//! Value with UTF8 encoding.
typedef GenericValue<UTF8<> > Value;
///////////////////////////////////////////////////////////////////////////////
// GenericDocument
//! A document for parsing JSON text as DOM.
/*!
\implements Handler
\tparam Encoding encoding for both parsing and string storage.
\tparam Alloactor allocator for allocating memory for the DOM, and the stack during parsing.
*/
template <typename Encoding, typename Allocator = MemoryPoolAllocator<> >
class GenericDocument : public GenericValue<Encoding, Allocator> {
public:
typedef typename Encoding::Ch Ch; //!< Character type derived from Encoding.
typedef GenericValue<Encoding, Allocator> ValueType; //!< Value type of the document.
typedef Allocator AllocatorType; //!< Allocator type from template parameter.
//! Constructor
/*! \param allocator Optional allocator for allocating stack memory.
\param stackCapacity Initial capacity of stack in bytes.
*/
GenericDocument(Allocator* allocator = 0, size_t stackCapacity = kDefaultStackCapacity) : stack_(allocator, stackCapacity), parseError_(0), errorOffset_(0) {}
//! Parse JSON text from an input stream.
/*! \tparam parseFlags Combination of ParseFlag.
\param stream Input stream to be parsed.
\return The document itself for fluent API.
*/
template <unsigned parseFlags, typename Stream>
GenericDocument& ParseStream(Stream& stream) {
ValueType::SetNull(); // Remove existing root if exist
GenericReader<Encoding, Allocator> reader;
if (reader.template Parse<parseFlags>(stream, *this)) {
RAPIDJSON_ASSERT(stack_.GetSize() == sizeof(ValueType)); // Got one and only one root object
this->RawAssign(*stack_.template Pop<ValueType>(1)); // Add this-> to prevent issue 13.
parseError_ = 0;
errorOffset_ = 0;
}
else {
parseError_ = reader.GetParseError();
errorOffset_ = reader.GetErrorOffset();
ClearStack();
}
return *this;
}
//! Parse JSON text from a mutable string.
/*! \tparam parseFlags Combination of ParseFlag.
\param str Mutable zero-terminated string to be parsed.
\return The document itself for fluent API.
*/
template <unsigned parseFlags>
GenericDocument& ParseInsitu(Ch* str) {
GenericInsituStringStream<Encoding> s(str);
return ParseStream<parseFlags | kParseInsituFlag>(s);
}
//! Parse JSON text from a read-only string.
/*! \tparam parseFlags Combination of ParseFlag (must not contain kParseInsituFlag).
\param str Read-only zero-terminated string to be parsed.
*/
template <unsigned parseFlags>
GenericDocument& Parse(const Ch* str) {
RAPIDJSON_ASSERT(!(parseFlags & kParseInsituFlag));
GenericStringStream<Encoding> s(str);
return ParseStream<parseFlags>(s);
}
//! Whether a parse error was occured in the last parsing.
bool HasParseError() const { return parseError_ != 0; }
//! Get the message of parsing error.
const char* GetParseError() const { return parseError_; }
//! Get the offset in character of the parsing error.
size_t GetErrorOffset() const { return errorOffset_; }
//! Get the allocator of this document.
Allocator& GetAllocator() { return stack_.GetAllocator(); }
//! Get the capacity of stack in bytes.
size_t GetStackCapacity() const { return stack_.GetCapacity(); }
private:
// Prohibit assignment
GenericDocument& operator=(const GenericDocument&);
friend class GenericReader<Encoding, Allocator>; // for Reader to call the following private handler functions
// Implementation of Handler
void Null() { new (stack_.template Push<ValueType>()) ValueType(); }
void Bool(bool b) { new (stack_.template Push<ValueType>()) ValueType(b); }
void Int(int i) { new (stack_.template Push<ValueType>()) ValueType(i); }
void Uint(unsigned i) { new (stack_.template Push<ValueType>()) ValueType(i); }
void Int64(int64_t i) { new (stack_.template Push<ValueType>()) ValueType(i); }
void Uint64(uint64_t i) { new (stack_.template Push<ValueType>()) ValueType(i); }
void Double(double d) { new (stack_.template Push<ValueType>()) ValueType(d); }
void String(const Ch* str, SizeType length, bool copy) {
if (copy)
new (stack_.template Push<ValueType>()) ValueType(str, length, GetAllocator());
else
new (stack_.template Push<ValueType>()) ValueType(str, length);
}
void StartObject() { new (stack_.template Push<ValueType>()) ValueType(kObjectType); }
void EndObject(SizeType memberCount) {
typename ValueType::Member* members = stack_.template Pop<typename ValueType::Member>(memberCount);
stack_.template Top<ValueType>()->SetObjectRaw(members, (SizeType)memberCount, GetAllocator());
}
void StartArray() { new (stack_.template Push<ValueType>()) ValueType(kArrayType); }
void EndArray(SizeType elementCount) {
ValueType* elements = stack_.template Pop<ValueType>(elementCount);
stack_.template Top<ValueType>()->SetArrayRaw(elements, elementCount, GetAllocator());
}
void ClearStack() {
if (Allocator::kNeedFree)
while (stack_.GetSize() > 0) // Here assumes all elements in stack array are GenericValue (Member is actually 2 GenericValue objects)
(stack_.template Pop<ValueType>(1))->~ValueType();
else
stack_.Clear();
}
static const size_t kDefaultStackCapacity = 1024;
internal::Stack<Allocator> stack_;
const char* parseError_;
size_t errorOffset_;
};
typedef GenericDocument<UTF8<> > Document;
} // namespace rapidjson
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // RAPIDJSON_DOCUMENT_H_

46
third-party/rapidjson/filestream.h vendored Normal file
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#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_

54
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#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_

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#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_

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#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_

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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.

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#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_

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#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_

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#ifndef RAPIDJSON_READER_H_
#define RAPIDJSON_READER_H_
// Copyright (c) 2011 Milo Yip (miloyip@gmail.com)
// Version 0.1
#include "rapidjson.h"
#include "internal/pow10.h"
#include "internal/stack.h"
#include <csetjmp>
#ifdef RAPIDJSON_SSE42
#include <nmmintrin.h>
#elif defined(RAPIDJSON_SSE2)
#include <emmintrin.h>
#endif
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4127) // conditional expression is constant
#endif
#ifndef RAPIDJSON_PARSE_ERROR
#define RAPIDJSON_PARSE_ERROR(msg, offset) \
RAPIDJSON_MULTILINEMACRO_BEGIN \
parseError_ = msg; \
errorOffset_ = offset; \
longjmp(jmpbuf_, 1); \
RAPIDJSON_MULTILINEMACRO_END
#endif
namespace rapidjson {
///////////////////////////////////////////////////////////////////////////////
// ParseFlag
//! Combination of parseFlags
enum ParseFlag {
kParseDefaultFlags = 0, //!< Default parse flags. Non-destructive parsing. Text strings are decoded into allocated buffer.
kParseInsituFlag = 1 //!< In-situ(destructive) parsing.
};
///////////////////////////////////////////////////////////////////////////////
// Handler
/*! \class rapidjson::Handler
\brief Concept for receiving events from GenericReader upon parsing.
\code
concept Handler {
typename Ch;
void Null();
void Bool(bool b);
void Int(int i);
void Uint(unsigned i);
void Int64(int64_t i);
void Uint64(uint64_t i);
void Double(double d);
void String(const Ch* str, SizeType length, bool copy);
void StartObject();
void EndObject(SizeType memberCount);
void StartArray();
void EndArray(SizeType elementCount);
};
\endcode
*/
///////////////////////////////////////////////////////////////////////////////
// BaseReaderHandler
//! Default implementation of Handler.
/*! This can be used as base class of any reader handler.
\implements Handler
*/
template<typename Encoding = UTF8<> >
struct BaseReaderHandler {
typedef typename Encoding::Ch Ch;
void Default() {}
void Null() { Default(); }
void Bool(bool) { Default(); }
void Int(int) { Default(); }
void Uint(unsigned) { Default(); }
void Int64(int64_t) { Default(); }
void Uint64(uint64_t) { Default(); }
void Double(double) { Default(); }
void String(const Ch*, SizeType, bool) { Default(); }
void StartObject() { Default(); }
void EndObject(SizeType) { Default(); }
void StartArray() { Default(); }
void EndArray(SizeType) { Default(); }
};
///////////////////////////////////////////////////////////////////////////////
// SkipWhitespace
//! Skip the JSON white spaces in a stream.
/*! \param stream A input stream for skipping white spaces.
\note This function has SSE2/SSE4.2 specialization.
*/
template<typename Stream>
void SkipWhitespace(Stream& stream) {
Stream s = stream; // Use a local copy for optimization
while (s.Peek() == ' ' || s.Peek() == '\n' || s.Peek() == '\r' || s.Peek() == '\t')
s.Take();
stream = s;
}
#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) {
static const char whitespace[16] = " \n\r\t";
__m128i w = _mm_loadu_si128((const __m128i *)&whitespace[0]);
for (;;) {
__m128i s = _mm_loadu_si128((const __m128i *)p);
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) // all 16 characters are whitespace
p += 16;
else { // some of characters may be non-whitespace
#ifdef _MSC_VER // Find the index of first non-whitespace
unsigned long offset;
if (_BitScanForward(&offset, r))
return p + offset;
#else
if (r != 0)
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) {
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"};
__m128i w0 = _mm_loadu_si128((const __m128i *)&whitespaces[0][0]);
__m128i w1 = _mm_loadu_si128((const __m128i *)&whitespaces[1][0]);
__m128i w2 = _mm_loadu_si128((const __m128i *)&whitespaces[2][0]);
__m128i w3 = _mm_loadu_si128((const __m128i *)&whitespaces[3][0]);
for (;;) {
__m128i s = _mm_loadu_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 = ~_mm_movemask_epi8(x);
if (r == 0) // all 16 characters are whitespace
p += 16;
else { // some of characters may be non-whitespace
#ifdef _MSC_VER // Find the index of first non-whitespace
unsigned long offset;
if (_BitScanForward(&offset, r))
return p + offset;
#else
if (r != 0)
return p + __builtin_ffs(r) - 1;
#endif
}
}
}
#endif // RAPIDJSON_SSE2
#ifdef RAPIDJSON_SIMD
//! Template function specialization for InsituStringStream
template<> inline void SkipWhitespace(InsituStringStream& stream) {
stream.src_ = const_cast<char*>(SkipWhitespace_SIMD(stream.src_));
}
//! Template function specialization for StringStream
template<> inline void SkipWhitespace(StringStream& stream) {
stream.src_ = SkipWhitespace_SIMD(stream.src_);
}
#endif // RAPIDJSON_SIMD
///////////////////////////////////////////////////////////////////////////////
// GenericReader
//! SAX-style JSON parser. Use 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 Encoding Encoding of both the stream and the parse output.
\tparam Allocator Allocator type for stack.
*/
template <typename Encoding, typename Allocator = MemoryPoolAllocator<> >
class GenericReader {
public:
typedef typename Encoding::Ch Ch;
//! Constructor.
/*! \param allocator 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(Allocator* allocator = 0, size_t stackCapacity = kDefaultStackCapacity) : stack_(allocator, stackCapacity), parseError_(0), errorOffset_(0) {}
//! Parse JSON text.
/*! \tparam parseFlags Combination of ParseFlag.
\tparam Stream Type of input stream.
\tparam Handler Type of handler which must implement Handler concept.
\param stream Input stream to be parsed.
\param handler The handler to receive events.
\return Whether the parsing is successful.
*/
template <unsigned parseFlags, typename Stream, typename Handler>
bool Parse(Stream& stream, Handler& handler) {
parseError_ = 0;
errorOffset_ = 0;
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4611) // interaction between '_setjmp' and C++ object destruction is non-portable
#endif
if (setjmp(jmpbuf_)) {
#ifdef _MSC_VER
#pragma warning(pop)
#endif
stack_.Clear();
return false;
}
SkipWhitespace(stream);
if (stream.Peek() == '\0')
RAPIDJSON_PARSE_ERROR("Text only contains white space(s)", stream.Tell());
else {
switch (stream.Peek()) {
case '{': ParseObject<parseFlags>(stream, handler); break;
case '[': ParseArray<parseFlags>(stream, handler); break;
default: RAPIDJSON_PARSE_ERROR("Expect either an object or array at root", stream.Tell());
}
SkipWhitespace(stream);
if (stream.Peek() != '\0')
RAPIDJSON_PARSE_ERROR("Nothing should follow the root object or array.", stream.Tell());
}
return true;
}
bool HasParseError() const { return parseError_ != 0; }
const char* GetParseError() const { return parseError_; }
size_t GetErrorOffset() const { return errorOffset_; }
private:
// Parse object: { string : value, ... }
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseObject(Stream& stream, Handler& handler) {
RAPIDJSON_ASSERT(stream.Peek() == '{');
stream.Take(); // Skip '{'
handler.StartObject();
SkipWhitespace(stream);
if (stream.Peek() == '}') {
stream.Take();
handler.EndObject(0); // empty object
return;
}
for (SizeType memberCount = 0;;) {
if (stream.Peek() != '"') {
RAPIDJSON_PARSE_ERROR("Name of an object member must be a string", stream.Tell());
break;
}
ParseString<parseFlags>(stream, handler);
SkipWhitespace(stream);
if (stream.Take() != ':') {
RAPIDJSON_PARSE_ERROR("There must be a colon after the name of object member", stream.Tell());
break;
}
SkipWhitespace(stream);
ParseValue<parseFlags>(stream, handler);
SkipWhitespace(stream);
++memberCount;
switch(stream.Take()) {
case ',': SkipWhitespace(stream); break;
case '}': handler.EndObject(memberCount); return;
default: RAPIDJSON_PARSE_ERROR("Must be a comma or '}' after an object member", stream.Tell());
}
}
}
// Parse array: [ value, ... ]
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseArray(Stream& stream, Handler& handler) {
RAPIDJSON_ASSERT(stream.Peek() == '[');
stream.Take(); // Skip '['
handler.StartArray();
SkipWhitespace(stream);
if (stream.Peek() == ']') {
stream.Take();
handler.EndArray(0); // empty array
return;
}
for (SizeType elementCount = 0;;) {
ParseValue<parseFlags>(stream, handler);
++elementCount;
SkipWhitespace(stream);
switch (stream.Take()) {
case ',': SkipWhitespace(stream); break;
case ']': handler.EndArray(elementCount); return;
default: RAPIDJSON_PARSE_ERROR("Must be a comma or ']' after an array element.", stream.Tell());
}
}
}
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseNull(Stream& stream, Handler& handler) {
RAPIDJSON_ASSERT(stream.Peek() == 'n');
stream.Take();
if (stream.Take() == 'u' && stream.Take() == 'l' && stream.Take() == 'l')
handler.Null();
else
RAPIDJSON_PARSE_ERROR("Invalid value", stream.Tell() - 1);
}
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseTrue(Stream& stream, Handler& handler) {
RAPIDJSON_ASSERT(stream.Peek() == 't');
stream.Take();
if (stream.Take() == 'r' && stream.Take() == 'u' && stream.Take() == 'e')
handler.Bool(true);
else
RAPIDJSON_PARSE_ERROR("Invalid value", stream.Tell());
}
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseFalse(Stream& stream, Handler& handler) {
RAPIDJSON_ASSERT(stream.Peek() == 'f');
stream.Take();
if (stream.Take() == 'a' && stream.Take() == 'l' && stream.Take() == 's' && stream.Take() == 'e')
handler.Bool(false);
else
RAPIDJSON_PARSE_ERROR("Invalid value", stream.Tell() - 1);
}
// Helper function to parse four hexidecimal digits in \uXXXX in ParseString().
template<typename Stream>
unsigned ParseHex4(Stream& stream) {
Stream s = stream; // Use a local copy for optimization
unsigned codepoint = 0;
for (int i = 0; i < 4; i++) {
Ch c = s.Take();
codepoint <<= 4;
codepoint += 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("Incorrect hex digit after \\u escape", s.Tell() - 1);
}
stream = s; // Restore stream
return codepoint;
}
// Parse string, handling the prefix and suffix double quotes and escaping.
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseString(Stream& stream, Handler& handler) {
#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
static const Ch 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
Stream s = stream; // Use a local copy for optimization
RAPIDJSON_ASSERT(s.Peek() == '\"');
s.Take(); // Skip '\"'
Ch *head;
SizeType len;
if (parseFlags & kParseInsituFlag)
head = s.PutBegin();
else
len = 0;
#define RAPIDJSON_PUT(x) \
do { \
if (parseFlags & kParseInsituFlag) \
s.Put(x); \
else { \
*stack_.template Push<Ch>() = x; \
++len; \
} \
} while(false)
for (;;) {
Ch c = s.Take();
if (c == '\\') { // Escape
Ch e = s.Take();
if ((sizeof(Ch) == 1 || (int)e < 256) && escape[(unsigned char)e])
RAPIDJSON_PUT(escape[(unsigned char)e]);
else if (e == 'u') { // Unicode
unsigned codepoint = ParseHex4(s);
if (codepoint >= 0xD800 && codepoint <= 0xDBFF) { // Handle UTF-16 surrogate pair
if (s.Take() != '\\' || s.Take() != 'u') {
RAPIDJSON_PARSE_ERROR("Missing the second \\u in surrogate pair", s.Tell() - 2);
return;
}
unsigned codepoint2 = ParseHex4(s);
if (codepoint2 < 0xDC00 || codepoint2 > 0xDFFF) {
RAPIDJSON_PARSE_ERROR("The second \\u in surrogate pair is invalid", s.Tell() - 2);
return;
}
codepoint = (((codepoint - 0xD800) << 10) | (codepoint2 - 0xDC00)) + 0x10000;
}
Ch buffer[4];
SizeType count = SizeType(Encoding::Encode(buffer, codepoint) - &buffer[0]);
if (parseFlags & kParseInsituFlag)
for (SizeType i = 0; i < count; i++)
s.Put(buffer[i]);
else {
memcpy(stack_.template Push<Ch>(count), buffer, count * sizeof(Ch));
len += count;
}
}
else {
RAPIDJSON_PARSE_ERROR("Unknown escape character", stream.Tell() - 1);
return;
}
}
else if (c == '"') { // Closing double quote
if (parseFlags & kParseInsituFlag) {
size_t length = s.PutEnd(head);
RAPIDJSON_ASSERT(length <= 0xFFFFFFFF);
RAPIDJSON_PUT('\0'); // null-terminate the string
handler.String(head, SizeType(length), false);
}
else {
RAPIDJSON_PUT('\0');
handler.String(stack_.template Pop<Ch>(len), len - 1, true);
}
stream = s; // restore stream
return;
}
else if (c == '\0') {
RAPIDJSON_PARSE_ERROR("lacks ending quotation before the end of string", stream.Tell() - 1);
return;
}
else if ((unsigned)c < 0x20) { // RFC 4627: unescaped = %x20-21 / %x23-5B / %x5D-10FFFF
RAPIDJSON_PARSE_ERROR("Incorrect unescaped character in string", stream.Tell() - 1);
return;
}
else
RAPIDJSON_PUT(c); // Normal character, just copy
}
#undef RAPIDJSON_PUT
}
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseNumber(Stream& stream, Handler& handler) {
Stream s = stream; // Local copy for optimization
// Parse minus
bool minus = false;
if (s.Peek() == '-') {
minus = true;
s.Take();
}
// Parse int: zero / ( digit1-9 *DIGIT )
unsigned i;
bool try64bit = false;
if (s.Peek() == '0') {
i = 0;
s.Take();
}
else if (s.Peek() >= '1' && s.Peek() <= '9') {
i = s.Take() - '0';
if (minus)
while (s.Peek() >= '0' && s.Peek() <= '9') {
if (i >= 214748364) { // 2^31 = 2147483648
if (i != 214748364 || s.Peek() > '8') {
try64bit = true;
break;
}
}
i = i * 10 + (s.Take() - '0');
}
else
while (s.Peek() >= '0' && s.Peek() <= '9') {
if (i >= 429496729) { // 2^32 - 1 = 4294967295
if (i != 429496729 || s.Peek() > '5') {
try64bit = true;
break;
}
}
i = i * 10 + (s.Take() - '0');
}
}
else {
RAPIDJSON_PARSE_ERROR("Expect a value here.", stream.Tell());
return;
}
// Parse 64bit int
uint64_t i64 = 0;
bool useDouble = false;
if (try64bit) {
i64 = i;
if (minus)
while (s.Peek() >= '0' && s.Peek() <= '9') {
if (i64 >= 922337203685477580uLL) // 2^63 = 9223372036854775808
if (i64 != 922337203685477580uLL || s.Peek() > '8') {
useDouble = true;
break;
}
i64 = i64 * 10 + (s.Take() - '0');
}
else
while (s.Peek() >= '0' && s.Peek() <= '9') {
if (i64 >= 1844674407370955161uLL) // 2^64 - 1 = 18446744073709551615
if (i64 != 1844674407370955161uLL || s.Peek() > '5') {
useDouble = true;
break;
}
i64 = i64 * 10 + (s.Take() - '0');
}
}
// Force double for big integer
double d = 0.0;
if (useDouble) {
d = (double)i64;
while (s.Peek() >= '0' && s.Peek() <= '9') {
if (d >= 1E307) {
RAPIDJSON_PARSE_ERROR("Number too big to store in double", stream.Tell());
return;
}
d = d * 10 + (s.Take() - '0');
}
}
// Parse frac = decimal-point 1*DIGIT
int expFrac = 0;
if (s.Peek() == '.') {
if (!useDouble) {
d = try64bit ? (double)i64 : (double)i;
useDouble = true;
}
s.Take();
if (s.Peek() >= '0' && s.Peek() <= '9') {
d = d * 10 + (s.Take() - '0');
--expFrac;
}
else {
RAPIDJSON_PARSE_ERROR("At least one digit in fraction part", stream.Tell());
return;
}
while (s.Peek() >= '0' && s.Peek() <= '9') {
if (expFrac > -16) {
d = d * 10 + (s.Peek() - '0');
--expFrac;
}
s.Take();
}
}
// Parse exp = e [ minus / plus ] 1*DIGIT
int exp = 0;
if (s.Peek() == 'e' || s.Peek() == 'E') {
if (!useDouble) {
d = try64bit ? (double)i64 : (double)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) {
RAPIDJSON_PARSE_ERROR("Number too big to store in double", stream.Tell());
return;
}
}
}
else {
RAPIDJSON_PARSE_ERROR("At least one digit in exponent", s.Tell());
return;
}
if (expMinus)
exp = -exp;
}
// Finish parsing, call event according to the type of number.
if (useDouble) {
d *= internal::Pow10(exp + expFrac);
handler.Double(minus ? -d : d);
}
else {
if (try64bit) {
if (minus)
handler.Int64(-(int64_t)i64);
else
handler.Uint64(i64);
}
else {
if (minus)
handler.Int(-(int)i);
else
handler.Uint(i);
}
}
stream = s; // restore stream
}
// Parse any JSON value
template<unsigned parseFlags, typename Stream, typename Handler>
void ParseValue(Stream& stream, Handler& handler) {
switch (stream.Peek()) {
case 'n': ParseNull <parseFlags>(stream, handler); break;
case 't': ParseTrue <parseFlags>(stream, handler); break;
case 'f': ParseFalse <parseFlags>(stream, handler); break;
case '"': ParseString<parseFlags>(stream, handler); break;
case '{': ParseObject<parseFlags>(stream, handler); break;
case '[': ParseArray <parseFlags>(stream, handler); break;
default : ParseNumber<parseFlags>(stream, handler);
}
}
static const size_t kDefaultStackCapacity = 256; //!< Default stack capacity in bytes for storing a single decoded string.
internal::Stack<Allocator> stack_; //!< A stack for storing decoded string temporarily during non-destructive parsing.
jmp_buf jmpbuf_; //!< setjmp buffer for fast exit from nested parsing function calls.
const char* parseError_;
size_t errorOffset_;
}; // class GenericReader
//! Reader with UTF8 encoding and default allocator.
typedef GenericReader<UTF8<> > Reader;
} // namespace rapidjson
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // RAPIDJSON_READER_H_

49
third-party/rapidjson/stringbuffer.h vendored Normal file
View File

@ -0,0 +1,49 @@
#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_

241
third-party/rapidjson/writer.h vendored Normal file
View File

@ -0,0 +1,241 @@
#ifndef RAPIDJSON_WRITER_H_
#define RAPIDJSON_WRITER_H_
#include "rapidjson.h"
#include "internal/stack.h"
#include "internal/strfunc.h"
#include <cstdio> // snprintf() or _sprintf_s()
#include <new> // placement new
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4127) // conditional expression is constant
#endif
namespace rapidjson {
//! JSON writer
/*! Writer implements the concept Handler.
It generates JSON text by events to an output stream.
User may programmatically calls the functions of a writer to generate JSON text.
On the other side, a writer can also be passed to objects that generates events,
for example Reader::Parse() and Document::Accept().
\tparam Stream Type of ouptut stream.
\tparam Encoding Encoding of both source strings and output.
\implements Handler
*/
template<typename Stream, typename Encoding = UTF8<>, typename Allocator = MemoryPoolAllocator<> >
class Writer {
public:
typedef typename Encoding::Ch Ch;
Writer(Stream& stream, Allocator* allocator = 0, size_t levelDepth = kDefaultLevelDepth) :
stream_(stream), level_stack_(allocator, levelDepth * sizeof(Level)) {}
//@name Implementation of Handler
//@{
Writer& Null() { Prefix(kNullType); WriteNull(); return *this; }
Writer& Bool(bool b) { Prefix(b ? kTrueType : kFalseType); WriteBool(b); return *this; }
Writer& Int(int i) { Prefix(kNumberType); WriteInt(i); return *this; }
Writer& Uint(unsigned u) { Prefix(kNumberType); WriteUint(u); return *this; }
Writer& Int64(int64_t i64) { Prefix(kNumberType); WriteInt64(i64); return *this; }
Writer& Uint64(uint64_t u64) { Prefix(kNumberType); WriteUint64(u64); return *this; }
Writer& Double(double d) { Prefix(kNumberType); WriteDouble(d); return *this; }
Writer& String(const Ch* str, SizeType length, bool copy = false) {
(void)copy;
Prefix(kStringType);
WriteString(str, length);
return *this;
}
Writer& StartObject() {
Prefix(kObjectType);
new (level_stack_.template Push<Level>()) Level(false);
WriteStartObject();
return *this;
}
Writer& EndObject(SizeType memberCount = 0) {
(void)memberCount;
RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
RAPIDJSON_ASSERT(!level_stack_.template Top<Level>()->inArray);
level_stack_.template Pop<Level>(1);
WriteEndObject();
return *this;
}
Writer& StartArray() {
Prefix(kArrayType);
new (level_stack_.template Push<Level>()) Level(true);
WriteStartArray();
return *this;
}
Writer& EndArray(SizeType elementCount = 0) {
(void)elementCount;
RAPIDJSON_ASSERT(level_stack_.GetSize() >= sizeof(Level));
RAPIDJSON_ASSERT(level_stack_.template Top<Level>()->inArray);
level_stack_.template Pop<Level>(1);
WriteEndArray();
return *this;
}
//@}
//! Simpler but slower overload.
Writer& String(const Ch* str) { return String(str, internal::StrLen(str)); }
protected:
//! Information for each nested level
struct Level {
Level(bool inArray_) : inArray(inArray_), valueCount(0) {}
bool inArray; //!< true if in array, otherwise in object
size_t valueCount; //!< number of values in this level
};
static const size_t kDefaultLevelDepth = 32;
void WriteNull() {
stream_.Put('n'); stream_.Put('u'); stream_.Put('l'); stream_.Put('l');
}
void WriteBool(bool b) {
if (b) {
stream_.Put('t'); stream_.Put('r'); stream_.Put('u'); stream_.Put('e');
}
else {
stream_.Put('f'); stream_.Put('a'); stream_.Put('l'); stream_.Put('s'); stream_.Put('e');
}
}
void WriteInt(int i) {
if (i < 0) {
stream_.Put('-');
i = -i;
}
WriteUint((unsigned)i);
}
void WriteUint(unsigned u) {
char buffer[10];
char *p = buffer;
do {
*p++ = (u % 10) + '0';
u /= 10;
} while (u > 0);
do {
--p;
stream_.Put(*p);
} while (p != buffer);
}
void WriteInt64(int64_t i64) {
if (i64 < 0) {
stream_.Put('-');
i64 = -i64;
}
WriteUint64((uint64_t)i64);
}
void WriteUint64(uint64_t u64) {
char buffer[20];
char *p = buffer;
do {
*p++ = char(u64 % 10) + '0';
u64 /= 10;
} while (u64 > 0);
do {
--p;
stream_.Put(*p);
} while (p != buffer);
}
//! \todo Optimization with custom double-to-string converter.
void WriteDouble(double d) {
char buffer[100];
#if _MSC_VER
int ret = sprintf_s(buffer, sizeof(buffer), "%g", d);
#else
int ret = snprintf(buffer, sizeof(buffer), "%g", d);
#endif
RAPIDJSON_ASSERT(ret >= 1);
for (int i = 0; i < ret; i++)
stream_.Put(buffer[i]);
}
void WriteString(const Ch* str, SizeType length) {
static const char hexDigits[] = "0123456789ABCDEF";
static const char escape[256] = {
#define Z16 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
//0 1 2 3 4 5 6 7 8 9 A B C D E F
'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'b', 't', 'n', 'u', 'f', 'r', 'u', 'u', // 00
'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', 'u', // 10
0, 0, '"', 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 20
Z16, Z16, // 30~4F
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,'\\', 0, 0, 0, // 50
Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16, Z16 // 60~FF
#undef Z16
};
stream_.Put('\"');
for (const Ch* p = str; p != str + length; ++p) {
if ((sizeof(Ch) == 1 || *p < 256) && escape[(unsigned char)*p]) {
stream_.Put('\\');
stream_.Put(escape[(unsigned char)*p]);
if (escape[(unsigned char)*p] == 'u') {
stream_.Put('0');
stream_.Put('0');
stream_.Put(hexDigits[(*p) >> 4]);
stream_.Put(hexDigits[(*p) & 0xF]);
}
}
else
stream_.Put(*p);
}
stream_.Put('\"');
}
void WriteStartObject() { stream_.Put('{'); }
void WriteEndObject() { stream_.Put('}'); }
void WriteStartArray() { stream_.Put('['); }
void WriteEndArray() { stream_.Put(']'); }
void Prefix(Type type) {
(void)type;
if (level_stack_.GetSize() != 0) { // this value is not at root
Level* level = level_stack_.template Top<Level>();
if (level->valueCount > 0) {
if (level->inArray)
stream_.Put(','); // add comma if it is not the first element in array
else // in object
stream_.Put((level->valueCount % 2 == 0) ? ',' : ':');
}
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);
}
Stream& stream_;
internal::Stack<Allocator> level_stack_;
private:
// Prohibit assignment for VC C4512 warning
Writer& operator=(const Writer& w);
};
} // namespace rapidjson
#ifdef _MSC_VER
#pragma warning(pop)
#endif
#endif // RAPIDJSON_RAPIDJSON_H_

159
utilities/document/document_db.cc
View File

@ -64,45 +64,43 @@ class Filter {
static Filter* ParseFilter(const JSONDocument& filter);
struct Interval {
JSONDocument upper_bound;
JSONDocument lower_bound;
const JSONDocument* upper_bound;
const JSONDocument* lower_bound;
bool upper_inclusive;
bool lower_inclusive;
Interval()
: upper_bound(),
lower_bound(),
: upper_bound(nullptr),
lower_bound(nullptr),
upper_inclusive(false),
lower_inclusive(false) {}
Interval(const JSONDocument& ub, const JSONDocument& lb, bool ui, bool li)
Interval(const JSONDocument* ub, const JSONDocument* lb, bool ui, bool li)
: upper_bound(ub),
lower_bound(lb),
upper_inclusive(ui),
lower_inclusive(li) {
}
void UpdateUpperBound(const JSONDocument& ub, bool inclusive);
void UpdateLowerBound(const JSONDocument& lb, bool inclusive);
lower_inclusive(li) {}
void UpdateUpperBound(const JSONDocument* ub, bool inclusive);
void UpdateLowerBound(const JSONDocument* lb, bool inclusive);
};
bool SatisfiesFilter(const JSONDocument& document) const;
const Interval* GetInterval(const std::string& field) const;
private:
explicit Filter(const JSONDocument& filter) : filter_(filter.Copy()) {
assert(filter_.IsOwner());
}
explicit Filter(const JSONDocument& filter) : filter_(filter) {}
// copied from the parameter
const JSONDocument filter_;
// upper_bound and lower_bound point to JSONDocuments in filter_, so no need
// to free them
// constant after construction
std::unordered_map<std::string, Interval> intervals_;
};
void Filter::Interval::UpdateUpperBound(const JSONDocument& ub,
void Filter::Interval::UpdateUpperBound(const JSONDocument* ub,
bool inclusive) {
bool update = upper_bound.IsNull();
bool update = (upper_bound == nullptr);
if (!update) {
int cmp = DocumentCompare(upper_bound, ub);
int cmp = DocumentCompare(*upper_bound, *ub);
update = (cmp > 0) || (cmp == 0 && !inclusive);
}
if (update) {
@ -111,11 +109,11 @@ void Filter::Interval::UpdateUpperBound(const JSONDocument& ub,
}
}
void Filter::Interval::UpdateLowerBound(const JSONDocument& lb,
void Filter::Interval::UpdateLowerBound(const JSONDocument* lb,
bool inclusive) {
bool update = lower_bound.IsNull();
bool update = (lower_bound == nullptr);
if (!update) {
int cmp = DocumentCompare(lower_bound, lb);
int cmp = DocumentCompare(*lower_bound, *lb);
update = (cmp < 0) || (cmp == 0 && !inclusive);
}
if (update) {
@ -137,14 +135,14 @@ Filter* Filter::ParseFilter(const JSONDocument& filter) {
continue;
}
assert(f->intervals_.find(items.first) == f->intervals_.end());
if (items.second.IsObject()) {
if (items.second.Count() == 0) {
if (items.second->IsObject()) {
if (items.second->Count() == 0) {
// uhm...?
return nullptr;
}
Interval interval;
for (const auto& condition : items.second.Items()) {
if (condition.second.IsObject() || condition.second.IsArray()) {
for (const auto& condition : items.second->Items()) {
if (condition.second->IsObject() || condition.second->IsArray()) {
// comparison operators not defined on objects. invalid array
return nullptr;
}
@ -166,8 +164,7 @@ Filter* Filter::ParseFilter(const JSONDocument& filter) {
} else {
// equality
f->intervals_.insert(
{items.first, Interval(items.second,
items.second, true, true)});
{items.first, Interval(items.second, items.second, true, true)});
}
}
@ -185,30 +182,30 @@ const Filter::Interval* Filter::GetInterval(const std::string& field) const {
bool Filter::SatisfiesFilter(const JSONDocument& document) const {
for (const auto& interval : intervals_) {
if (!document.Contains(interval.first)) {
auto value = document.Get(interval.first);
if (value == nullptr) {
// doesn't have the value, doesn't satisfy the filter
// (we don't support null queries yet)
return false;
}
auto value = document[interval.first];
if (!interval.second.upper_bound.IsNull()) {
if (value.type() != interval.second.upper_bound.type()) {
if (interval.second.upper_bound != nullptr) {
if (value->type() != interval.second.upper_bound->type()) {
// no cross-type queries yet
// TODO(icanadi) do this at least for numbers!
return false;
}
int cmp = DocumentCompare(interval.second.upper_bound, value);
int cmp = DocumentCompare(*interval.second.upper_bound, *value);
if (cmp < 0 || (cmp == 0 && interval.second.upper_inclusive == false)) {
// bigger (or equal) than upper bound
return false;
}
}
if (!interval.second.lower_bound.IsNull()) {
if (value.type() != interval.second.lower_bound.type()) {
if (interval.second.lower_bound != nullptr) {
if (value->type() != interval.second.lower_bound->type()) {
// no cross-type queries yet
return false;
}
int cmp = DocumentCompare(interval.second.lower_bound, value);
int cmp = DocumentCompare(*interval.second.lower_bound, *value);
if (cmp > 0 || (cmp == 0 && interval.second.lower_inclusive == false)) {
// smaller (or equal) than the lower bound
return false;
@ -389,12 +386,13 @@ class SimpleSortedIndex : public Index {
virtual void GetIndexKey(const JSONDocument& document, std::string* key) const
override {
if (!document.Contains(field_)) {
auto value = document.Get(field_);
if (value == nullptr) {
if (!EncodeJSONPrimitive(JSONDocument(JSONDocument::kNull), key)) {
assert(false);
}
} else {
if (!EncodeJSONPrimitive(document[field_], key)) {
if (!EncodeJSONPrimitive(*value, key)) {
assert(false);
}
}
@ -413,11 +411,11 @@ class SimpleSortedIndex : public Index {
Direction direction;
const JSONDocument* limit;
if (!interval->lower_bound.IsNull()) {
limit = &(interval->lower_bound);
if (interval->lower_bound != nullptr) {
limit = interval->lower_bound;
direction = kForwards;
} else {
limit = &(interval->upper_bound);
limit = interval->upper_bound;
direction = kBackwards;
}
@ -435,13 +433,14 @@ class SimpleSortedIndex : public Index {
Index::Direction direction) const {
auto interval = filter.GetInterval(field_);
assert(interval != nullptr); // because index is useful
if (direction == kForwards) {
if (interval->upper_bound.IsNull()) {
if (interval->upper_bound == nullptr) {
// continue looking, no upper bound
return true;
}
std::string encoded_upper_bound;
if (!EncodeJSONPrimitive(interval->upper_bound, &encoded_upper_bound)) {
if (!EncodeJSONPrimitive(*interval->upper_bound, &encoded_upper_bound)) {
// uhm...?
// TODO(icanadi) store encoded upper and lower bounds in Filter*?
assert(false);
@ -457,12 +456,12 @@ class SimpleSortedIndex : public Index {
: true;
} else {
assert(direction == kBackwards);
if (interval->lower_bound.IsNull()) {
if (interval->lower_bound == nullptr) {
// continue looking, no lower bound
return true;
}
std::string encoded_lower_bound;
if (!EncodeJSONPrimitive(interval->lower_bound, &encoded_lower_bound)) {
if (!EncodeJSONPrimitive(*interval->lower_bound, &encoded_lower_bound)) {
// uhm...?
// TODO(icanadi) store encoded upper and lower bounds in Filter*?
assert(false);
@ -495,7 +494,7 @@ Index* Index::CreateIndexFromDescription(const JSONDocument& description,
return nullptr;
}
const auto& field = *description.Items().begin();
if (field.second.IsInt64() == false || field.second.GetInt64() != 1) {
if (field.second->IsInt64() == false || field.second->GetInt64() != 1) {
// not supported yet
return nullptr;
}
@ -585,7 +584,6 @@ class CursorWithFilterIndexed : public Cursor {
}
current_json_document_.reset(
JSONDocument::Deserialize(primary_index_iter_->value()));
assert(current_json_document_->IsOwner());
if (current_json_document_.get() == nullptr) {
status_ = Status::Corruption("JSON deserialization failed");
valid_ = false;
@ -803,19 +801,16 @@ class DocumentDBImpl : public DocumentDB {
if (!document.IsObject()) {
return Status::InvalidArgument("Document not an object");
}
if (!document.Contains(kPrimaryKey)) {
return Status::InvalidArgument("No primary key");
}
auto primary_key = document[kPrimaryKey];
if (primary_key.IsNull() ||
(!primary_key.IsString() && !primary_key.IsInt64())) {
auto primary_key = document.Get(kPrimaryKey);
if (primary_key == nullptr || primary_key->IsNull() ||
(!primary_key->IsString() && !primary_key->IsInt64())) {
return Status::InvalidArgument(
"Primary key format error");
"No primary key or primary key format error");
}
std::string encoded_document;
document.Serialize(&encoded_document);
std::string primary_key_encoded;
if (!EncodeJSONPrimitive(primary_key, &primary_key_encoded)) {
if (!EncodeJSONPrimitive(*primary_key, &primary_key_encoded)) {
// previous call should be guaranteed to pass because of all primary_key
// conditions checked before
assert(false);
@ -858,19 +853,16 @@ class DocumentDBImpl : public DocumentDB {
if (!document.IsObject()) {
return Status::Corruption("Document corruption");
}
if (!document.Contains(kPrimaryKey)) {
return Status::Corruption("Document corruption");
}
auto primary_key = document[kPrimaryKey];
if (primary_key.IsNull() ||
(!primary_key.IsString() && !primary_key.IsInt64())) {
auto primary_key = document.Get(kPrimaryKey);
if (primary_key == nullptr || primary_key->IsNull() ||
(!primary_key->IsString() && !primary_key->IsInt64())) {
return Status::Corruption("Document corruption");
}
// TODO(icanadi) Instead of doing this, just get primary key encoding from
// cursor, as it already has this information
std::string primary_key_encoded;
if (!EncodeJSONPrimitive(primary_key, &primary_key_encoded)) {
if (!EncodeJSONPrimitive(*primary_key, &primary_key_encoded)) {
// previous call should be guaranteed to pass because of all primary_key
// conditions checked before
assert(false);
@ -901,9 +893,6 @@ class DocumentDBImpl : public DocumentDB {
std::unique_ptr<Cursor> cursor(
ConstructFilterCursor(read_options, nullptr, filter));
if (!updates.IsObject()) {
return Status::Corruption("Bad update document format");
}
WriteBatch batch;
for (; cursor->status().ok() && cursor->Valid(); cursor->Next()) {
const auto& old_document = cursor->document();
@ -914,35 +903,12 @@ class DocumentDBImpl : public DocumentDB {
// TODO(icanadi) Make this nicer, something like class Filter
for (const auto& update : updates.Items()) {
if (update.first == "$set") {
JSONDocumentBuilder builder;
bool res = builder.WriteStartObject();
assert(res);
for (const auto& itr : update.second.Items()) {
for (const auto& itr : update.second->Items()) {
if (itr.first == kPrimaryKey) {
return Status::NotSupported("Please don't change primary key");
}
res = builder.WriteKeyValue(itr.first, itr.second);
assert(res);
new_document.Set(itr.first, *itr.second);
}
res = builder.WriteEndObject();
assert(res);
JSONDocument update_document = builder.GetJSONDocument();
builder.Reset();
res = builder.WriteStartObject();
assert(res);
for (const auto& itr : new_document.Items()) {
if (update_document.Contains(itr.first)) {
res = builder.WriteKeyValue(itr.first,
update_document[itr.first]);
} else {
res = builder.WriteKeyValue(itr.first, new_document[itr.first]);
}
assert(res);
}
res = builder.WriteEndObject();
assert(res);
new_document = builder.GetJSONDocument();
assert(new_document.IsOwner());
} else {
// TODO(icanadi) more commands
return Status::InvalidArgument("Can't understand update command");
@ -950,12 +916,9 @@ class DocumentDBImpl : public DocumentDB {
}
// TODO(icanadi) reuse some of this code
if (!new_document.Contains(kPrimaryKey)) {
return Status::Corruption("Corrupted document -- primary key missing");
}
auto primary_key = new_document[kPrimaryKey];
if (primary_key.IsNull() ||
(!primary_key.IsString() && !primary_key.IsInt64())) {
auto primary_key = new_document.Get(kPrimaryKey);
if (primary_key == nullptr || primary_key->IsNull() ||
(!primary_key->IsString() && !primary_key->IsInt64())) {
// This will happen when document on storage doesn't have primary key,
// since we don't support any update operations on primary key. That's
// why this is corruption error
@ -964,7 +927,7 @@ class DocumentDBImpl : public DocumentDB {
std::string encoded_document;
new_document.Serialize(&encoded_document);
std::string primary_key_encoded;
if (!EncodeJSONPrimitive(primary_key, &primary_key_encoded)) {
if (!EncodeJSONPrimitive(*primary_key, &primary_key_encoded)) {
// previous call should be guaranteed to pass because of all primary_key
// conditions checked before
assert(false);
@ -1019,7 +982,7 @@ class DocumentDBImpl : public DocumentDB {
const auto& command = *command_doc.Items().begin();
if (command.first == "$filter") {
cursor = ConstructFilterCursor(read_options, cursor, command.second);
cursor = ConstructFilterCursor(read_options, cursor, *command.second);
} else {
// only filter is supported for now
delete cursor;
@ -1068,12 +1031,12 @@ class DocumentDBImpl : public DocumentDB {
IndexColumnFamily tmp_storage(nullptr, nullptr);
if (cursor == nullptr) {
auto index_name = query.Get("$index");
IndexColumnFamily* index_column_family = nullptr;
if (query.Contains("$index") && query["$index"].IsString()) {
if (index_name != nullptr && index_name->IsString()) {
{
auto index_name = query["$index"];
MutexLock l(&name_to_index_mutex_);
auto index_iter = name_to_index_.find(index_name.GetString());
auto index_iter = name_to_index_.find(index_name->GetString());
if (index_iter != name_to_index_.end()) {
tmp_storage = index_iter->second;
index_column_family = &tmp_storage;

24
utilities/document/document_db_test.cc
View File

@ -67,7 +67,7 @@ class DocumentDBTest {
TEST(DocumentDBTest, SimpleQueryTest) {
DocumentDBOptions options;
DocumentDB::IndexDescriptor index;
index.description = Parse("{\"name\": 1}");
index.description = Parse("{'name': 1}");
index.name = "name_index";
ASSERT_OK(DocumentDB::Open(options, dbname_, {}, &db_));
@ -78,8 +78,8 @@ TEST(DocumentDBTest, SimpleQueryTest) {
delete index.description;
std::vector<std::string> json_objects = {
"{\"_id\': 1, \"name\": \"One\"}", "{\"_id\": 2, \"name\": \"Two\"}",
"{\"_id\": 3, \"name\": \"Three\"}", "{\"_id\": 4, \"name\": \"Four\"}"};
"{'_id': 1, 'name': 'One'}", "{'_id': 2, 'name': 'Two'}",
"{'_id': 3, 'name': 'Three'}", "{'_id': 4, 'name': 'Four'}"};
for (auto& json : json_objects) {
std::unique_ptr<JSONDocument> document(Parse(json));
@ -255,24 +255,6 @@ TEST(DocumentDBTest, ComplexQueryTest) {
ASSERT_OK(db_->Update(ReadOptions(), WriteOptions(), *query, *update));
}
// update twice: set priority to 15 where job_name is 'white'
{
std::unique_ptr<JSONDocument> query(Parse("{'job_name': 'white'}"));
std::unique_ptr<JSONDocument> update(Parse("{'$set': {'priority': 10},"
"'$set': {'priority': 15}}"));
ASSERT_OK(db_->Update(ReadOptions(), WriteOptions(), *query, *update));
}
// update twice: set priority to 15 and
// progress to 40 where job_name is 'white'
{
std::unique_ptr<JSONDocument> query(Parse("{'job_name': 'white'}"));
std::unique_ptr<JSONDocument> update(
Parse("{'$set': {'priority': 10, 'progress': 35},"
"'$set': {'priority': 15, 'progress': 40}}"));
ASSERT_OK(db_->Update(ReadOptions(), WriteOptions(), *query, *update));
}
// priority < 0
{
std::unique_ptr<JSONDocument> query(

965
utilities/document/json_document.cc
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File diff suppressed because it is too large Load Diff

114
utilities/document/json_document_builder.cc
View File

@ -1,114 +0,0 @@
// Copyright (c) 2013, 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.
#ifndef ROCKSDB_LITE
#include "rocksdb/utilities/json_document.h"
#include "third-party/fbson/FbsonWriter.h"
namespace rocksdb {
JSONDocumentBuilder::JSONDocumentBuilder()
: writer_(new fbson::FbsonWriter()) {
}
JSONDocumentBuilder::JSONDocumentBuilder(fbson::FbsonOutStream* out)
: writer_(new fbson::FbsonWriter(*out)) {
}
void JSONDocumentBuilder::Reset() {
writer_->reset();
}
bool JSONDocumentBuilder::WriteStartArray() {
return writer_->writeStartArray();
}
bool JSONDocumentBuilder::WriteEndArray() {
return writer_->writeEndArray();
}
bool JSONDocumentBuilder::WriteStartObject() {
return writer_->writeStartObject();
}
bool JSONDocumentBuilder::WriteEndObject() {
return writer_->writeEndObject();
}
bool JSONDocumentBuilder::WriteKeyValue(const std::string& key,
const JSONDocument& value) {
size_t bytesWritten = writer_->writeKey(key.c_str(), key.size());
if (bytesWritten == 0) {
return false;
}
return WriteJSONDocument(value);
}
bool JSONDocumentBuilder::WriteJSONDocument(const JSONDocument& value) {
switch (value.type()) {
case JSONDocument::kNull:
return writer_->writeNull() != 0;
case JSONDocument::kInt64:
return writer_->writeInt64(value.GetInt64());
case JSONDocument::kDouble:
return writer_->writeDouble(value.GetDouble());
case JSONDocument::kBool:
return writer_->writeBool(value.GetBool());
case JSONDocument::kString:
{
bool res = writer_->writeStartString();
if (!res) {
return false;
}
const std::string& str = value.GetString();
res = writer_->writeString(str.c_str(), str.size());
if (!res) {
return false;
}
return writer_->writeEndString();
}
case JSONDocument::kArray:
{
bool res = WriteStartArray();
if (!res) {
return false;
}
for (size_t i = 0; i < value.Count(); ++i) {
res = WriteJSONDocument(value[i]);
if (!res) {
return false;
}
}
return WriteEndArray();
}
case JSONDocument::kObject:
{
bool res = WriteStartObject();
if (!res) {
return false;
}
for (auto keyValue : value.Items()) {
WriteKeyValue(keyValue.first, keyValue.second);
}
return WriteEndObject();
}
default:
assert(false);
}
return false;
}
JSONDocument JSONDocumentBuilder::GetJSONDocument() {
fbson::FbsonValue* value =
fbson::FbsonDocument::createValue(writer_->getOutput()->getBuffer(),
writer_->getOutput()->getSize());
return JSONDocument(value, true);
}
JSONDocumentBuilder::~JSONDocumentBuilder() {
}
} // namespace rocksdb
#endif // ROCKSDB_LITE

216
utilities/document/json_document_test.cc
View File

@ -3,9 +3,7 @@
// 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.
#include <map>
#include <set>
#include <string>
#include "rocksdb/utilities/json_document.h"
@ -50,10 +48,6 @@ void AssertField(const JSONDocument& json, const std::string& field,
class JSONDocumentTest {
public:
JSONDocumentTest()
: rnd_(101)
{}
void AssertSampleJSON(const JSONDocument& json) {
AssertField(json, "title", std::string("json"));
AssertField(json, "type", std::string("object"));
@ -100,95 +94,14 @@ class JSONDocumentTest {
"\"flags\": [10, \"parse\", {\"tag\": \"no\", \"status\": 2}], "
"\"age\": 110.5e-4, \"depth\": -10 }, \"latlong\": [53.25, 43.75], "
"\"enabled\": true }";
Random rnd_;
};
TEST(JSONDocumentTest, MakeNullTest) {
JSONDocument x;
ASSERT_TRUE(x.IsNull());
ASSERT_TRUE(x.IsOwner());
ASSERT_TRUE(!x.IsBool());
}
TEST(JSONDocumentTest, MakeBoolTest) {
{
JSONDocument x(true);
ASSERT_TRUE(x.IsOwner());
ASSERT_TRUE(x.IsBool());
ASSERT_TRUE(!x.IsInt64());
ASSERT_EQ(x.GetBool(), true);
}
{
JSONDocument x(false);
ASSERT_TRUE(x.IsOwner());
ASSERT_TRUE(x.IsBool());
ASSERT_TRUE(!x.IsInt64());
ASSERT_EQ(x.GetBool(), false);
}
}
TEST(JSONDocumentTest, MakeInt64Test) {
JSONDocument x(static_cast<int64_t>(16));
ASSERT_TRUE(x.IsInt64());
ASSERT_TRUE(x.IsInt64());
ASSERT_TRUE(!x.IsBool());
ASSERT_TRUE(x.IsOwner());
ASSERT_EQ(x.GetInt64(), 16);
}
TEST(JSONDocumentTest, MakeStringTest) {
JSONDocument x("string");
ASSERT_TRUE(x.IsOwner());
ASSERT_TRUE(x.IsString());
ASSERT_TRUE(!x.IsBool());
ASSERT_EQ(x.GetString(), "string");
}
TEST(JSONDocumentTest, MakeDoubleTest) {
JSONDocument x(5.6);
ASSERT_TRUE(x.IsOwner());
ASSERT_TRUE(x.IsDouble());
ASSERT_TRUE(!x.IsBool());
ASSERT_EQ(x.GetDouble(), 5.6);
}
TEST(JSONDocumentTest, MakeByTypeTest) {
{
JSONDocument x(JSONDocument::kNull);
ASSERT_TRUE(x.IsNull());
}
{
JSONDocument x(JSONDocument::kBool);
ASSERT_TRUE(x.IsBool());
}
{
JSONDocument x(JSONDocument::kString);
ASSERT_TRUE(x.IsString());
}
{
JSONDocument x(JSONDocument::kInt64);
ASSERT_TRUE(x.IsInt64());
}
{
JSONDocument x(JSONDocument::kDouble);
ASSERT_TRUE(x.IsDouble());
}
{
JSONDocument x(JSONDocument::kObject);
ASSERT_TRUE(x.IsObject());
}
{
JSONDocument x(JSONDocument::kArray);
ASSERT_TRUE(x.IsArray());
}
}
TEST(JSONDocumentTest, Parsing) {
std::unique_ptr<JSONDocument> parsed_json(
JSONDocument::ParseJSON(kSampleJSON.c_str()));
ASSERT_TRUE(parsed_json->IsOwner());
JSONDocument x(static_cast<int64_t>(5));
ASSERT_TRUE(x.IsInt64());
// make sure it's correctly parsed
auto parsed_json = JSONDocument::ParseJSON(kSampleJSON.c_str());
ASSERT_TRUE(parsed_json != nullptr);
AssertSampleJSON(*parsed_json);
@ -196,11 +109,13 @@ TEST(JSONDocumentTest, Parsing) {
JSONDocument copied_json_document(*parsed_json);
AssertSampleJSON(copied_json_document);
ASSERT_TRUE(copied_json_document == *parsed_json);
delete parsed_json;
std::unique_ptr<JSONDocument> parsed_different_sample(
JSONDocument::ParseJSON(kSampleJSONDifferent.c_str()));
auto parsed_different_sample =
JSONDocument::ParseJSON(kSampleJSONDifferent.c_str());
ASSERT_TRUE(parsed_different_sample != nullptr);
ASSERT_TRUE(!(*parsed_different_sample == copied_json_document));
delete parsed_different_sample;
// parse error
const std::string kFaultyJSON =
@ -209,116 +124,45 @@ TEST(JSONDocumentTest, Parsing) {
}
TEST(JSONDocumentTest, Serialization) {
std::unique_ptr<JSONDocument> parsed_json(
JSONDocument::ParseJSON(kSampleJSON.c_str()));
auto parsed_json = JSONDocument::ParseJSON(kSampleJSON.c_str());
ASSERT_TRUE(parsed_json != nullptr);
ASSERT_TRUE(parsed_json->IsOwner());
std::string serialized;
parsed_json->Serialize(&serialized);
delete parsed_json;
std::unique_ptr<JSONDocument> deserialized_json(
JSONDocument::Deserialize(Slice(serialized)));
auto deserialized_json = JSONDocument::Deserialize(Slice(serialized));
ASSERT_TRUE(deserialized_json != nullptr);
AssertSampleJSON(*deserialized_json);
delete deserialized_json;
// deserialization failure
ASSERT_TRUE(JSONDocument::Deserialize(
Slice(serialized.data(), serialized.size() - 10)) == nullptr);
}
TEST(JSONDocumentTest, OperatorEqualsTest) {
// kNull
ASSERT_TRUE(JSONDocument() == JSONDocument());
TEST(JSONDocumentTest, Mutation) {
auto sample_json = JSONDocument::ParseJSON(kSampleJSON.c_str());
ASSERT_TRUE(sample_json != nullptr);
auto different_json = JSONDocument::ParseJSON(kSampleJSONDifferent.c_str());
ASSERT_TRUE(different_json != nullptr);
// kBool
ASSERT_TRUE(JSONDocument(false) != JSONDocument());
ASSERT_TRUE(JSONDocument(false) == JSONDocument(false));
ASSERT_TRUE(JSONDocument(true) == JSONDocument(true));
ASSERT_TRUE(JSONDocument(false) != JSONDocument(true));
(*different_json)["properties"]["flags"][2].Set("status", JSONDocument());
// kString
ASSERT_TRUE(JSONDocument("test") != JSONDocument());
ASSERT_TRUE(JSONDocument("test") == JSONDocument("test"));
ASSERT_TRUE(*different_json == *sample_json);
// kInt64
ASSERT_TRUE(JSONDocument(static_cast<int64_t>(15)) != JSONDocument());
ASSERT_TRUE(JSONDocument(static_cast<int64_t>(15)) !=
JSONDocument(static_cast<int64_t>(14)));
ASSERT_TRUE(JSONDocument(static_cast<int64_t>(15)) ==
JSONDocument(static_cast<int64_t>(15)));
delete different_json;
delete sample_json;
unique_ptr<JSONDocument> arrayWithInt8Doc(JSONDocument::ParseJSON("[8]"));
ASSERT_TRUE(arrayWithInt8Doc != nullptr);
ASSERT_TRUE(arrayWithInt8Doc->IsArray());
ASSERT_TRUE((*arrayWithInt8Doc)[0].IsInt64());
ASSERT_TRUE((*arrayWithInt8Doc)[0] == JSONDocument(static_cast<int64_t>(8)));
auto json1 = JSONDocument::ParseJSON("{\"a\": [1, 2, 3]}");
auto json2 = JSONDocument::ParseJSON("{\"a\": [2, 2, 3, 4]}");
ASSERT_TRUE(json1 != nullptr && json2 != nullptr);
unique_ptr<JSONDocument> arrayWithInt16Doc(JSONDocument::ParseJSON("[512]"));
ASSERT_TRUE(arrayWithInt16Doc != nullptr);
ASSERT_TRUE(arrayWithInt16Doc->IsArray());
ASSERT_TRUE((*arrayWithInt16Doc)[0].IsInt64());
ASSERT_TRUE((*arrayWithInt16Doc)[0] ==
JSONDocument(static_cast<int64_t>(512)));
(*json1)["a"].SetInArray(0, static_cast<int64_t>(2))->PushBack(
static_cast<int64_t>(4));
ASSERT_TRUE(*json1 == *json2);
unique_ptr<JSONDocument> arrayWithInt32Doc(
JSONDocument::ParseJSON("[1000000]"));
ASSERT_TRUE(arrayWithInt32Doc != nullptr);
ASSERT_TRUE(arrayWithInt32Doc->IsArray());
ASSERT_TRUE((*arrayWithInt32Doc)[0].IsInt64());
ASSERT_TRUE((*arrayWithInt32Doc)[0] ==
JSONDocument(static_cast<int64_t>(1000000)));
// kDouble
ASSERT_TRUE(JSONDocument(15.) != JSONDocument());
ASSERT_TRUE(JSONDocument(15.) != JSONDocument(14.));
ASSERT_TRUE(JSONDocument(15.) == JSONDocument(15.));
}
TEST(JSONDocumentTest, JSONDocumentBuilderTest) {
unique_ptr<JSONDocument> parsedArray(
JSONDocument::ParseJSON("[1, [123, \"a\", \"b\"], {\"b\":\"c\"}]"));
ASSERT_TRUE(parsedArray != nullptr);
JSONDocumentBuilder builder;
ASSERT_TRUE(builder.WriteStartArray());
ASSERT_TRUE(builder.WriteJSONDocument(1));
ASSERT_TRUE(builder.WriteStartArray());
ASSERT_TRUE(builder.WriteJSONDocument(123));
ASSERT_TRUE(builder.WriteJSONDocument("a"));
ASSERT_TRUE(builder.WriteJSONDocument("b"));
ASSERT_TRUE(builder.WriteEndArray());
ASSERT_TRUE(builder.WriteStartObject());
ASSERT_TRUE(builder.WriteKeyValue("b", "c"));
ASSERT_TRUE(builder.WriteEndObject());
ASSERT_TRUE(builder.WriteEndArray());
ASSERT_TRUE(*parsedArray == builder.GetJSONDocument());
}
TEST(JSONDocumentTest, OwnershipTest) {
std::unique_ptr<JSONDocument> parsed(
JSONDocument::ParseJSON(kSampleJSON.c_str()));
ASSERT_TRUE(parsed != nullptr);
ASSERT_TRUE(parsed->IsOwner());
// Copy constructor from owner -> owner
JSONDocument copy_constructor(*parsed);
ASSERT_TRUE(copy_constructor.IsOwner());
// Copy constructor from non-owner -> non-owner
JSONDocument non_owner((*parsed)["properties"]);
ASSERT_TRUE(!non_owner.IsOwner());
// Move constructor from owner -> owner
JSONDocument moved_from_owner(std::move(copy_constructor));
ASSERT_TRUE(moved_from_owner.IsOwner());
// Move constructor from non-owner -> non-owner
JSONDocument moved_from_non_owner(std::move(non_owner));
ASSERT_TRUE(!moved_from_non_owner.IsOwner());
delete json1;
delete json2;
}
} // namespace rocksdb