TShMIn Class Reference

#include <fl.h>

Inheritance diagram for TShMIn:

Collaboration diagram for TShMIn:

Public Member Functions
	TShMIn (const TStr &Str)
	TShMIn (void *_Bf, const TSize &_BfL)
	~TShMIn ()
bool	Eof ()
int	Len () const
char	GetCh ()
char *	getCursor ()
char	PeekCh ()
void	LoadCs ()
int	GetBf (const void *LBf, const TSize &LBfL)
bool	GetNextLnBf (TChA &LnChA)
void	LoadAndAdvance (void *Dest, TSize ElemSize)
	Copy memory into the destination and advance the cursor. More...
char *	AdvanceCursor (TSize N)
	Return the current pointer and advance the cursor. More...
void	CloseMapping ()
	munmap the mapping. Note that munmap is not called by the destructor More...
Public Member Functions inherited from TSIn
	TSIn ()
	TSIn (const TStr &Str)
virtual	~TSIn ()
virtual void	Reset ()
bool	IsFastMode () const
void	SetFastMode (const bool &_FastMode)
void	LoadBf (const void *Bf, const TSize &BfL)
void *	LoadNewBf (const int &BfL)
void	Load (bool &Bool)
void	Load (uchar &UCh)
void	Load (char &Ch)
void	Load (short &Short)
void	Load (ushort &UShort)
void	Load (int &Int)
void	Load (uint &UInt)
void	Load (int64 &Int)
void	Load (uint64 &UInt)
void	Load (double &Flt)
void	Load (sdouble &SFlt)
void	Load (ldouble &LFlt)
void	Load (char *&CStr, const int &MxCStrLen, const int &CStrLen)
void	Load (char *&CStr)
TSIn &	operator>> (bool &Bool)
TSIn &	operator>> (uchar &UCh)
TSIn &	operator>> (char &Ch)
TSIn &	operator>> (short &Sh)
TSIn &	operator>> (ushort &USh)
TSIn &	operator>> (int &Int)
TSIn &	operator>> (uint &UInt)
TSIn &	operator>> (int64 &Int)
TSIn &	operator>> (uint64 &UInt)
TSIn &	operator>> (float &Flt)
TSIn &	operator>> (double &Double)
TSIn &	operator>> (long double &LDouble)
bool	GetNextLn (TStr &LnStr)
bool	GetNextLn (TChA &LnChA)
Public Member Functions inherited from TSBase
	TSBase (const TSStr &Nm)
virtual	~TSBase ()
virtual TStr	GetSNm () const

Private Attributes
char *	OriginalBuffer
TSize	TotalLength
TSize	SizeLeft
char *	Cursor
bool	IsMemoryMapped

Additional Inherited Members
Static Public Attributes inherited from TSIn
static const TPt< TSIn >	StdIn =PSIn(new TStdIn())
Protected Attributes inherited from TSBase
TCRef	CRef
TSStr	SNm
TCs	Cs

Detailed Description

Definition at line 384 of file fl.h.

Constructor & Destructor Documentation

TShMIn::TShMIn

(

const TStr &

Str

)

Definition at line 538 of file fl.cpp.

References TStr::CStr(), Cursor, EAssertR, TStr::Empty(), IsMemoryMapped, OriginalBuffer, SEEK_END, SEEK_SET, SizeLeft, TExcept::Throw(), and TotalLength.

                             : TSBase("Input-Shared_Memory"), 
    TSIn("Input-Shared_Memory"), TotalLength(0),
    SizeLeft(0) {

#ifdef GLib_LINUX
      TStr FNm = Str;
      TFileId FileId;
      int fd;
      uint64 FLen;
      EAssertR(!FNm.Empty(), "Empty file-name.");
      FileId=fopen(FNm.CStr(), "rb");
      fd = fileno(FileId);
      EAssertR(FileId!=NULL, "Can not open file '"+FNm+"'.");
      EAssertR(
          fseek(FileId, 0, SEEK_END)==0,
          "Error seeking into file '"+TStr(FNm)+"'.");
      FLen=(uint64)ftell(FileId);
      EAssertR(
          fseek(FileId, 0, SEEK_SET)==0,
          "Error seeking into file '"+TStr(FNm)+"'.");
      char *Mapped;
      Mapped = (char *) mmap (0, FLen, PROT_READ, MAP_PRIVATE, fd, 0);
      EAssertR(Mapped!=MAP_FAILED, "mmap failed in TShMIn.");
      OriginalBuffer = Mapped;
      Cursor = OriginalBuffer;
      SizeLeft = FLen;
      TotalLength = FLen;
      IsMemoryMapped = true;
#else
      TExcept::Throw("TMIn::TMIn(TStr, Bool): GLib_LINUX undefined.\n");
#endif
    }

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TShMIn::TShMIn	(	void *	_Bf,
		const TSize &	_BfL
	)

Definition at line 571 of file fl.cpp.

References Cursor, and OriginalBuffer.

                                          : TSBase("Input-Shared_Memory"), 
  TSIn("Input-Shared_Memory"), TotalLength(_BfL), SizeLeft(_BfL), IsMemoryMapped(false) {
    OriginalBuffer = (char*)_Bf;
    Cursor = (char*)_Bf;
  }

TShMIn::~TShMIn ( )

inline

Definition at line 394 of file fl.h.

{}

Member Function Documentation

char* TShMIn::AdvanceCursor ( TSize  N )

inline

Return the current pointer and advance the cursor.

Definition at line 425 of file fl.h.

References Cursor.

Referenced by LoadAndAdvance(), TBigStrPool::LoadPoolShM(), and TVec< TVal, TSizeTy >::LoadShM().

                                 {
      char* TempCursor = Cursor;
      Cursor += N;
      SizeLeft -= N;
      return TempCursor;
    }

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void TShMIn::CloseMapping

(

)

munmap the mapping. Note that munmap is not called by the destructor

Definition at line 577 of file fl.cpp.

References Cursor, IsMemoryMapped, OriginalBuffer, SizeLeft, and TotalLength.

                          {
  if (OriginalBuffer!=NULL){
    if (IsMemoryMapped) {
#ifdef GLib_LINUX
      munmap(OriginalBuffer, TotalLength);
      IsMemoryMapped = false;
      OriginalBuffer = NULL;
      Cursor = NULL;
      TotalLength= 0;
      SizeLeft = 0;
#endif
    }
  }
}

bool TShMIn::Eof ( )

inlinevirtual

Implements TSIn.

Definition at line 395 of file fl.h.

{ return SizeLeft<=0; }

int TShMIn::GetBf ( const void *  LBf, const TSize &  LBfL  )

inlinevirtual

Implements TSIn.

Definition at line 412 of file fl.h.

References LoadAndAdvance().

Referenced by LoadCs().

                                                 {
      LoadAndAdvance((char*)LBf, LBfL);
      return 0;
    }

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char TShMIn::GetCh ( )

inlinevirtual

Implements TSIn.

Definition at line 397 of file fl.h.

References LoadAndAdvance().

                 {
      char c;
      LoadAndAdvance(&c, sizeof(c));
      return c;
    }

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char* TShMIn::getCursor ( )

inline

Definition at line 402 of file fl.h.

References Cursor.

                      {
      return Cursor;
    }

bool TShMIn::GetNextLnBf ( TChA &  LnChA )

inlinevirtual

Implements TSIn.

Definition at line 416 of file fl.h.

                                 {
      return false;
    }

int TShMIn::Len ( ) const

inlinevirtual

Implements TSIn.

Definition at line 396 of file fl.h.

References TotalLength.

{ return TotalLength; }

void TShMIn::LoadAndAdvance ( void *  Dest, TSize  ElemSize  )

inline

Copy memory into the destination and advance the cursor.

Definition at line 420 of file fl.h.

References AdvanceCursor().

Referenced by GetBf(), and GetCh().

                                                    {
      memcpy(Dest, Cursor, ElemSize);
      AdvanceCursor(ElemSize);
    }

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void TShMIn::LoadCs ( )

inlinevirtual

Reimplemented from TSIn.

Definition at line 408 of file fl.h.

References GetBf().

Referenced by TBigStrPool::LoadPoolShM(), THash< TPair, THash >::LoadShM(), and TStrHash< TInt, TBigStrPool >::LoadShM().

                  {
      TCs TestCs;
      GetBf(&TestCs, sizeof(TestCs));
    }

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char TShMIn::PeekCh ( )

inlinevirtual

Implements TSIn.

Definition at line 405 of file fl.h.

                  {
      return ((char*)Cursor)[0];
    }

Member Data Documentation

char* TShMIn::Cursor

private

Definition at line 389 of file fl.h.

Referenced by AdvanceCursor(), CloseMapping(), getCursor(), and TShMIn().

bool TShMIn::IsMemoryMapped

private

Definition at line 390 of file fl.h.

Referenced by CloseMapping(), and TShMIn().

char* TShMIn::OriginalBuffer

private

Definition at line 386 of file fl.h.

Referenced by CloseMapping(), and TShMIn().

TSize TShMIn::SizeLeft

private

Definition at line 388 of file fl.h.

Referenced by CloseMapping(), and TShMIn().

TSize TShMIn::TotalLength

private

Definition at line 387 of file fl.h.

Referenced by CloseMapping(), Len(), and TShMIn().

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

• glib-core/fl.h
• glib-core/fl.cpp