Hasher< Encoding, Allocator >

#include <schema.h>

Collaboration diagram for Hasher< Encoding, Allocator >:

Classes
struct	Number

Public Types
typedef Encoding::Ch	Ch

Public Member Functions
	Hasher (Allocator *allocator=0, size_t stackCapacity=kDefaultSize)
bool	Null ()
bool	Bool (bool b)
bool	Int (int i)
bool	Uint (unsigned u)
bool	Int64 (int64_t i)
bool	Uint64 (uint64_t u)
bool	Double (double d)
bool	RawNumber (const Ch *str, SizeType len, bool)
bool	String (const Ch *str, SizeType len, bool)
bool	StartObject ()
bool	Key (const Ch *str, SizeType len, bool copy)
bool	EndObject (SizeType memberCount)
bool	StartArray ()
bool	EndArray (SizeType elementCount)
bool	IsValid () const
uint64_t	GetHashCode () const

Private Member Functions
bool	WriteType (Type type)
bool	WriteNumber (const Number &n)
bool	WriteBuffer (Type type, const void *data, size_t len)

Static Private Member Functions
static uint64_t	Hash (uint64_t h, uint64_t d)

Private Attributes
Stack< Allocator >	stack_

Static Private Attributes
static const size_t	kDefaultSize = 256

Detailed Description

template<typename Encoding, typename Allocator>
class internal::Hasher< Encoding, Allocator >

Definition at line 220 of file schema.h.

Member Typedef Documentation

Ch

typedef Encoding::Ch Ch

Definition at line 222 of file schema.h.

Constructor & Destructor Documentation

Hasher()

Hasher ( Allocator *  allocator = 0, size_t  stackCapacity = kDefaultSize  )

inline

Definition at line 224 of file schema.h.

: stack_(allocator, stackCapacity) {}

Member Function Documentation

Bool()

bool Bool ( bool  b )

inline

Definition at line 227 of file schema.h.

{ return WriteType(b ? kTrueType : kFalseType); }

Double()

bool Double ( double  d )

inline

Definition at line 232 of file schema.h.

                          { 
        Number n; 
        if (d < 0) n.u.i = static_cast<int64_t>(d);
        else       n.u.u = static_cast<uint64_t>(d); 
        n.d = d;
        return WriteNumber(n);
    }

EndArray()

bool EndArray ( SizeType  elementCount )

inline

Definition at line 262 of file schema.h.

                                         { 
        uint64_t h = Hash(0, kArrayType);
        uint64_t* e = stack_.template Pop<uint64_t>(elementCount);
        for (SizeType i = 0; i < elementCount; i++)
            h = Hash(h, e[i]); // Use hash to achieve element order sensitive
        *stack_.template Push<uint64_t>() = h;
        return true;
    }

EndObject()

bool EndObject ( SizeType  memberCount )

inline

Definition at line 252 of file schema.h.

                                         { 
        uint64_t h = Hash(0, kObjectType);
        uint64_t* kv = stack_.template Pop<uint64_t>(memberCount * 2);
        for (SizeType i = 0; i < memberCount; i++)
            h ^= Hash(kv[i * 2], kv[i * 2 + 1]);  // Use xor to achieve member order insensitive
        *stack_.template Push<uint64_t>() = h;
        return true;
    }

GetHashCode()

uint64_t GetHashCode ( ) const

inline

Definition at line 273 of file schema.h.

                                 {
        RAPIDJSON_ASSERT(IsValid());
        return *stack_.template Top<uint64_t>();
    }

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Hash()

static uint64_t Hash ( uint64_t  h, uint64_t  d  )

inlinestaticprivate

Definition at line 302 of file schema.h.

                                                 {
        static const uint64_t kPrime = RAPIDJSON_UINT64_C2(0x00000100, 0x000001b3);
        h ^= d;
        h *= kPrime;
        return h;
    }

Int()

bool Int ( int  i )

inline

Definition at line 228 of file schema.h.

{ Number n; n.u.i = i; n.d = static_cast<double>(i); return WriteNumber(n); }

Int64()

bool Int64 ( int64_t  i )

inline

Definition at line 230 of file schema.h.

{ Number n; n.u.i = i; n.d = static_cast<double>(i); return WriteNumber(n); }

IsValid()

bool IsValid ( ) const

inline

Definition at line 271 of file schema.h.

{ return stack_.GetSize() == sizeof(uint64_t); }

Key()

bool Key ( const Ch *  str, SizeType  len, bool  copy  )

inline

Definition at line 251 of file schema.h.

{ return String(str, len, copy); }

Null()

bool Null ( )

inline

Definition at line 226 of file schema.h.

{ return WriteType(kNullType); }

RawNumber()

bool RawNumber ( const Ch *  str, SizeType  len, bool    )

inline

Definition at line 240 of file schema.h.

                                                      {
        WriteBuffer(kNumberType, str, len * sizeof(Ch));
        return true;
    }

StartArray()

bool StartArray ( )

inline

Definition at line 261 of file schema.h.

{ return true; }

StartObject()

bool StartObject ( )

inline

Definition at line 250 of file schema.h.

{ return true; }

String()

bool String ( const Ch *  str, SizeType  len, bool    )

inline

Definition at line 245 of file schema.h.

                                                   {
        WriteBuffer(kStringType, str, len * sizeof(Ch));
        return true;
    }

Uint()

bool Uint ( unsigned  u )

inline

Definition at line 229 of file schema.h.

{ Number n; n.u.u = u; n.d = static_cast<double>(u); return WriteNumber(n); }

Uint64()

bool Uint64 ( uint64_t  u )

inline

Definition at line 231 of file schema.h.

{ Number n; n.u.u = u; n.d = static_cast<double>(u); return WriteNumber(n); }

WriteBuffer()

bool WriteBuffer ( Type  type, const void *  data, size_t  len  )

inlineprivate

Definition at line 292 of file schema.h.

                                                              {
        // FNV-1a from http://isthe.com/chongo/tech/comp/fnv/
        uint64_t h = Hash(RAPIDJSON_UINT64_C2(0x84222325, 0xcbf29ce4), type);
        const unsigned char* d = static_cast<const unsigned char*>(data);
        for (size_t i = 0; i < len; i++)
            h = Hash(h, d[i]);
        *stack_.template Push<uint64_t>() = h;
        return true;
    }

WriteNumber()

bool WriteNumber ( const Number &  n )

inlineprivate

Definition at line 290 of file schema.h.

{ return WriteBuffer(kNumberType, &n, sizeof(n)); }

WriteType()

bool WriteType ( Type  type )

inlineprivate

Definition at line 288 of file schema.h.

{ return WriteBuffer(type, 0, 0); }

Member Data Documentation

kDefaultSize

const size_t kDefaultSize = 256

staticprivate

Definition at line 279 of file schema.h.

stack_

Stack<Allocator> stack_

private

Definition at line 309 of file schema.h.

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The documentation for this class was generated from the following file:

• rapidjson/schema.h