FileReadStream Class Reference

File byte stream for input using fread(). More...

#include <filereadstream.h>

Public Types
typedef char	Ch
	Character type (byte). More...

Public Member Functions
	FileReadStream (std::FILE *fp, 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
void	Read ()

Private Attributes
std::FILE *	fp_
Ch *	buffer_
size_t	bufferSize_
Ch *	bufferLast_
Ch *	current_
size_t	readCount_
size_t	count_
	Number of characters read. More...
bool	eof_

Detailed Description

File byte stream for input using fread().

Note

implements Stream concept

Member Typedef Documentation

typedef char FileReadStream::Ch

Character type (byte).

Constructor & Destructor Documentation

FileReadStream::FileReadStream ( std::FILE *  fp, char *  buffer, size_t  bufferSize  )

inline

Constructor.

Parameters

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

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

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Member Function Documentation

void FileReadStream::Flush ( )

inline

{ RAPIDJSON_ASSERT(false); } 

Ch FileReadStream::Peek ( ) const

inline

{ return *current_; }

const Ch* FileReadStream::Peek4 ( ) const

inline

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

void FileReadStream::Put ( Ch  )

inline

{ RAPIDJSON_ASSERT(false); }

Ch* FileReadStream::PutBegin ( )

inline

{ RAPIDJSON_ASSERT(false); return 0; }

size_t FileReadStream::PutEnd ( Ch *  )

inline

{ RAPIDJSON_ASSERT(false); return 0; }

void FileReadStream::Read ( )

inlineprivate

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

 if (readCount_ < bufferSize_) {
 buffer_[readCount_] = '\0';
 ++bufferLast_;
 eof_ = true;
 }
 }
 }

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Ch FileReadStream::Take ( )

inline

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

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size_t FileReadStream::Tell ( ) const

inline

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

Member Data Documentation

Ch* FileReadStream::buffer_

private

Ch* FileReadStream::bufferLast_

private

size_t FileReadStream::bufferSize_

private

size_t FileReadStream::count_

private

Number of characters read.

Ch* FileReadStream::current_

private

bool FileReadStream::eof_

private

std::FILE* FileReadStream::fp_

private

size_t FileReadStream::readCount_

private

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

• dep/rapidjson/rapidjson/filereadstream.h