Native/C++
filebuf (Buffer class for file streams)
aucd29
2013. 10. 2. 19:02
Buffer class for file streams
Standard hierarchy
Public member functions:
filebuf members: |
(constructor) |
Construct object |
is_open |
Check if file is open |
open |
Open file |
close |
Close file |
members inherited from streambuf: |
pubimbue |
Imbue locale |
getloc |
Get current locale |
pubsetbuf |
Set buffer array |
pubseekoff |
Set relative position of internal position pointer |
pubseekpos |
Set absolute position of internal position pointer |
pubsync |
Synchronize stream |
in_avail |
Get number of characters available in input buffer |
snextc |
Increase get pointer and return next character |
sbumpc |
Get current character and increase get pointer |
sgetc |
Get current character |
sgetn |
Get some characters |
sputbackc |
Put character back |
sungetc |
Decrease get pointer |
sputc |
Store character at current put position and increase put pointer |
sputn |
Write some characters |
Protected member functions:
filebuf members: |
seekoff |
Set relative position of internal position pointer [virtual] |
seekpos |
Set absolute position of internal position pointer [virtual] |
underflow |
Get current character [virtual] |
pbackfail |
Put character back [virtual] |
overflow |
Put character at current put position [virtual] |
sync |
Synchronize file buffer [virtual] |
setbuf |
Set buffer [virtual] |
members inherited from streambuf: |
eback |
Get pointer to beginning of input sequence |
egptr |
Get pointer to end of input seuqence |
epptr |
Get pointer to end of output sequence |
gbump |
Increase get pointer |
gptr |
Return get pointer |
pbase |
Get pointer to beginning of output sequence |
pbump |
Increase put pointer |
pptr |
Return put pointer |
setg |
Set input buffer pointers |
setp |
Set output buffer pointers |
imbue |
Imbue locale [virtual] |
showmanyc |
Get number of characters availbale in input sequence [virtual] |
uflow |
Get current character [virtual] |
xsgetn |
Get some characters [virtual] |
xsputn |
Write some characters [virtual] |
Description
The objects instatiated from this class associate an input and an output sequence with a file, allowing the input and output functionality of streams to be performed on files.
Every object of this class controls both an input and an output sequence, although some sequence may be restricted depending on the openmode used to open the file with member function open.
Once an open file is closed (member close) the filebuf object may be used to open other files.
The state of the filebuf object -wether a file is open or not- may be tested by calling member is_open.
This class overrides some virtual members inherited from streambuf to provide a specific functionality adapted to file manipulation. Plese refer to parent class streambuf for more information on streambuf-derived objects.