BasicIStreamWrapper< StreamType >

Wrapper of std::basic_istream into RapidJSON's Stream concept. More...

#include <istreamwrapper.h>

Collaboration diagram for BasicIStreamWrapper< StreamType >:

Public Types
typedef StreamType::char_type	Ch

Public Member Functions
	BasicIStreamWrapper (StreamType &stream)
	Constructor. More...
	BasicIStreamWrapper (StreamType &stream, char *buffer, size_t bufferSize)
	Constructor. More...
Ch	Peek () const
Ch	Take ()
size_t	Tell () const
void	Put (Ch)
void	Flush ()
Ch *	PutBegin ()
size_t	PutEnd (Ch *)
const Ch *	Peek4 () const

Private Member Functions
	BasicIStreamWrapper ()
	BasicIStreamWrapper (const BasicIStreamWrapper &)
BasicIStreamWrapper &	operator= (const BasicIStreamWrapper &)
void	Read ()

Private Attributes
StreamType &	stream_
Ch	peekBuffer_ [4]
Ch *	buffer_
size_t	bufferSize_
Ch *	bufferLast_
Ch *	current_
size_t	readCount_
size_t	count_
	Number of characters read. More...
bool	eof_

Detailed Description

template<typename StreamType>
class BasicIStreamWrapper< StreamType >

Wrapper of std::basic_istream into RapidJSON's Stream concept.

The classes can be wrapped including but not limited to:

• std::istringstream
• std::stringstream
• std::wistringstream
• std::wstringstream
• std::ifstream
• std::fstream
• std::wifstream
• std::wfstream

Template Parameters

StreamType

Class derived from std::basic_istream.

Definition at line 48 of file istreamwrapper.h.

Member Typedef Documentation

Ch

typedef StreamType::char_type Ch

Definition at line 50 of file istreamwrapper.h.

Constructor & Destructor Documentation

BasicIStreamWrapper() [1/4]

BasicIStreamWrapper ( StreamType &  stream )

inline

Constructor.

Parameters

stream

stream opened for read.

Definition at line 56 of file istreamwrapper.h.

                                            : stream_(stream), buffer_(peekBuffer_), bufferSize_(4), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { 
        Read();
    }

Here is the call graph for this function:

BasicIStreamWrapper() [2/4]

BasicIStreamWrapper ( StreamType &  stream, char *  buffer, size_t  bufferSize  )

inline

Constructor.

Parameters

stream	stream opened for read.
buffer	user-supplied buffer.
bufferSize	size of buffer in bytes. Must >=4 bytes.

Definition at line 66 of file istreamwrapper.h.

                                                                             : stream_(stream), buffer_(buffer), bufferSize_(bufferSize), bufferLast_(0), current_(buffer_), readCount_(0), count_(0), eof_(false) { 
        RAPIDJSON_ASSERT(bufferSize >= 4);
        Read();
    }

Here is the call graph for this function:

BasicIStreamWrapper() [3/4]

BasicIStreamWrapper ( )

private

Here is the caller graph for this function:

BasicIStreamWrapper() [4/4]

BasicIStreamWrapper ( const BasicIStreamWrapper< StreamType > &  )

private

Member Function Documentation

Flush()

void Flush ( )

inline

Definition at line 77 of file istreamwrapper.h.

{ RAPIDJSON_ASSERT(false); } 

operator=()

BasicIStreamWrapper& operator= ( const BasicIStreamWrapper< StreamType > &  )

private

Here is the caller graph for this function:

Peek()

Ch Peek ( ) const

inline

Definition at line 71 of file istreamwrapper.h.

{ return *current_; }

Peek4()

const Ch* Peek4 ( ) const

inline

Definition at line 82 of file istreamwrapper.h.

                            {
        return (current_ + 4 - !eof_ <= bufferLast_) ? current_ : 0;
    }

Here is the call graph for this function:

Put()

void Put ( Ch  )

inline

Definition at line 76 of file istreamwrapper.h.

{ RAPIDJSON_ASSERT(false); }

PutBegin()

Ch* PutBegin ( )

inline

Definition at line 78 of file istreamwrapper.h.

{ RAPIDJSON_ASSERT(false); return 0; }

PutEnd()

size_t PutEnd ( Ch *  )

inline

Definition at line 79 of file istreamwrapper.h.

{ RAPIDJSON_ASSERT(false); return 0; }

Read()

void Read ( )

inlineprivate

Definition at line 91 of file istreamwrapper.h.

                {
        if (current_ < bufferLast_)
            ++current_;
        else if (!eof_) {
            count_ += readCount_;
            readCount_ = bufferSize_;
            bufferLast_ = buffer_ + readCount_ - 1;
            current_ = buffer_;

            if (!stream_.read(buffer_, static_cast<std::streamsize>(bufferSize_))) {
                readCount_ = static_cast<size_t>(stream_.gcount());
                *(bufferLast_ = buffer_ + readCount_) = '\0';
                eof_ = true;
            }
        }
    }

Here is the caller graph for this function:

Take()

Ch Take ( )

inline

Definition at line 72 of file istreamwrapper.h.

{ Ch c = *current_; Read(); return c; }

Here is the call graph for this function:

Tell()

size_t Tell ( ) const

inline

Definition at line 73 of file istreamwrapper.h.

{ return count_ + static_cast<size_t>(current_ - buffer_); }

Member Data Documentation

buffer_

Ch * buffer_

private

Definition at line 109 of file istreamwrapper.h.

bufferLast_

Ch* bufferLast_

private

Definition at line 111 of file istreamwrapper.h.

bufferSize_

size_t bufferSize_

private

Definition at line 110 of file istreamwrapper.h.

count_

size_t count_

private

Number of characters read.

Definition at line 114 of file istreamwrapper.h.

current_

Ch* current_

private

Definition at line 112 of file istreamwrapper.h.

eof_

bool eof_

private

Definition at line 115 of file istreamwrapper.h.

peekBuffer_

Ch peekBuffer_[4]

private

Definition at line 109 of file istreamwrapper.h.

readCount_

size_t readCount_

private

Definition at line 113 of file istreamwrapper.h.

stream_

StreamType& stream_

private

Definition at line 108 of file istreamwrapper.h.

---

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

• rapidjson/istreamwrapper.h