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Header File
<owl/file.h>
Description
The TFile class encapsulates standard file characteristics and
operations.
Constructors
TFile::TFile
Form 1
TFile();
Form 2
TFile(
TFileHandle& handle, bool shouldClose );
Form 3
TFile( LPCTSTR
name, const uint32 mode=ReadOnly|PermRead|OpenExisting );
Description
Form 1: Creates a TFile
object with a file handle of FileNull.
Form 2: Creates a TFile
object with a file handle of handle.
Form 3: Creates a TFile
object and opens file name with the given attributes.
Public Data Members
File Flags
Member Functions
Close
Syntax
bool Close();
Description
Closes the file. Returns nonzero if successful,
0 otherwise.
GetName
Syntax
const string& GetName() const;
Description
Get file name.
Flush
Syntax
void Flush();
Description
Performs any pending I/O functions.
GetStatus
Form 1
bool GetStatus( TFileStatus& status
) const;
Form 2
bool GetStatus( LPCTSTR name,
TFileStatus& status );
Description
Form 1: Fills status with the current file
status. Returns nonzero if successful, 0 otherwise.
Form 2: Fills status with the status for name.
Returns nonzero if successful, 0 otherwise.
IsOpen
Syntax
int IsOpen() const;
Description
Returns 1 if the file is open, 0 otherwise.
Length
Length64
Form 1
uint32 Length() const;
Form 2
uint64 Length64() const;
Form 3
booo Length( uint32 newLen );
Form 4
booo Length( uint64 newLen );
Description
Form 1: Returns the file length.
Form 2: Returns the file length.
Form 3: Resizes file to newLen, return false if
error.
Form 4: Resizes file to newLen, return
false if error.
LockRange
Form 1
void LockRange( uint32 position, uint32
count );
Form 2
void LockRange( uint64 position, uint64
count );
Description
Locks count bytes, beginning at position of the
associated file.
Open
Syntax
bool Open( LPCTSTR name, uint32
mode=ReadOnly|PermRead|OpenExisting);
Description
Opens file name with the given attributes.
Returns 1 if successful, 0 otherwise.
Position
Position64
Form 1
uint32 Position() const;
Form 2
uint64 Position64() const;
Description
Form 1: Returns the current position of the
file pointer. Returns -1 to indicate an error.
Form 2: Returns the current position
of the file pointer. Returns -1 to indicate an error.
Read
Syntax
uint32 Read( void *buffer, uint32
numBytes );
Description
Reads numBytes from the file into buffer.
Seek
Form 1
uint32 Seek( long offset, int origin =
beg );
Form 2
uint64 Seek( int64 offset, int origin =
beg );
Description
Repositions the file pointer to offset bytes
from the specified origin.
SeekToBegin
SeekToBegin64
Form 1
uint32 SeekToBegin();
Form 2
uint64 SeekToBegin64();
Description
Repositions the file pointer to the beginning
of the file.
SeekToEnd
SeekToEnd64
Form 1
uint32 SeekToEnd();
Form 2
uint64 SeekToEnd64();
Description
Repositions the file pointer to the end of the
file.
SetStatus
Syntax
static bool SetStatus( LPCTSTR name,
const TFileStatus& status );
Description
Sets file name's status to status.
UnlockRange
Form 1
void UnlockRange(uint32 Position,
uint32 count );
Form 2
void UnlockRange(uint64 Position,
uint64 count );
Description
Unlocks the range at the given Position.
Write
Syntax
bool Write( const void *buffer, uint32
numBytes );
Description
Writes numbytes of buffer to the file.
ReadStruct
Form 1
uint32
ReadStruct(void* buffer, TBinField* fields, TByteOrderType type);
Form 2
static uint32
ReadStruct(uint8* readBuf, void* buffer, TBinField* fields, TByteOrderType type);
Description
Form 1. Read structure from file.
Form 2. Read structure from buffer.
WriteStruct
Form 1
uint32
WriteStruct(void* buffer, TBinField* fields,TByteOrderType type);
Form 2
static uint32
WriteStruct(uint8* writeBuf, void* buffer, TBinField* fields, TByteOrderType type);
Description
Form 1. Write structure to file.
Form 2. Read structure to buffer.
StructSize
Syntax
static uint32 StructSize(TBinField
_OWLFAR* fields);
Description
Return size of structure;
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