#include <io.h>
Public Types | |
kSet = SEEK_SET | |
Beginning of the file. | |
kCur = SEEK_CUR | |
Current position. | |
kEnd = SEEK_END | |
End of file. | |
enum | Whence { kSet = SEEK_SET, kCur = SEEK_CUR, kEnd = SEEK_END } |
Public Member Functions | |
virtual | ~IOHandler () |
Virtual destructor. | |
std::string | getImplId (void) const throw () |
String ID of the implementation. | |
virtual void | close (void) throw (DmException) |
Close. | |
virtual int | fileno (void) throw (DmException) |
Return internal file descriptor, if any. | |
virtual struct::stat | fstat (void) throw (DmException) |
virtual size_t | read (char *buffer, size_t count) throw (DmException) |
virtual size_t | write (const char *buffer, size_t count) throw (DmException) |
virtual size_t | readv (const struct iovec *vector, size_t count) throw (DmException) |
virtual size_t | writev (const struct iovec *vector, size_t count) throw (DmException) |
virtual size_t | pread (void *buffer, size_t count, off_t offset) throw (DmException) |
virtual size_t | pwrite (const void *buffer, size_t count, off_t offset) throw (DmException) |
virtual void | seek (off_t offset, Whence whence) throw (DmException) |
virtual off_t | tell (void) throw (DmException) |
Return the cursor position. | |
virtual void | flush (void) throw (DmException) |
Flush the buffer. | |
virtual bool | eof (void) throw (DmException) |
Return true if end of file. |
virtual dmlite::IOHandler::~IOHandler | ( | ) | [virtual] |
Virtual destructor.
virtual void dmlite::IOHandler::close | ( | void | ) | throw (DmException) [virtual] |
Close.
virtual bool dmlite::IOHandler::eof | ( | void | ) | throw (DmException) [virtual] |
Return true if end of file.
virtual int dmlite::IOHandler::fileno | ( | void | ) | throw (DmException) [virtual] |
Return internal file descriptor, if any.
virtual void dmlite::IOHandler::flush | ( | void | ) | throw (DmException) [virtual] |
Flush the buffer.
virtual struct ::stat dmlite::IOHandler::fstat | ( | void | ) | throw (DmException) [virtual] |
Gets information about a file descriptor.
Default implementation combining seek/tell is provided.
std::string dmlite::IOHandler::getImplId | ( | void | ) | const throw () [inline] |
String ID of the implementation.
virtual size_t dmlite::IOHandler::pread | ( | void * | buffer, | |
size_t | count, | |||
off_t | offset | |||
) | throw (DmException) [virtual] |
Read from the given offset without changing the file offset.
buffer | Where to put the data. | |
count | Number of bytes to read. | |
offset | The operation offset. |
virtual size_t dmlite::IOHandler::pwrite | ( | const void * | buffer, | |
size_t | count, | |||
off_t | offset | |||
) | throw (DmException) [virtual] |
Write from the given offset without changing the file offset.
buffer | Data to write. | |
count | Number of bytes to read. | |
offset | The operation offset. |
virtual size_t dmlite::IOHandler::read | ( | char * | buffer, | |
size_t | count | |||
) | throw (DmException) [virtual] |
Read.
buffer | Where to store the data. | |
count | Number of bytes to read. |
virtual size_t dmlite::IOHandler::readv | ( | const struct iovec * | vector, | |
size_t | count | |||
) | throw (DmException) [virtual] |
Read into multiple buffers.
vector | An array with 'count' iovec structs. | |
count | Number of elements in vector. |
A default implementation using read is provided.
virtual void dmlite::IOHandler::seek | ( | off_t | offset, | |
Whence | whence | |||
) | throw (DmException) [virtual] |
Move the cursor.
offset | The offset. | |
whence | Reference. |
virtual off_t dmlite::IOHandler::tell | ( | void | ) | throw (DmException) [virtual] |
Return the cursor position.
virtual size_t dmlite::IOHandler::write | ( | const char * | buffer, | |
size_t | count | |||
) | throw (DmException) [virtual] |
Write.
buffer | Data to write. | |
count | Number of bytes to write. |
virtual size_t dmlite::IOHandler::writev | ( | const struct iovec * | vector, | |
size_t | count | |||
) | throw (DmException) [virtual] |
Write from multiple buffers.
vector | An array with 'count' iovec structs. | |
count | Number of elements in vector. |
A default implementation using write is provided.