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Unified bufferd network I/O

Unified bufferd network I/O — Posix style buffered network input/output.

Synopsis

typedef             GnomeVFSSocketBuffer;
GnomeVFSSocketBuffer* gnome_vfs_socket_buffer_new       (GnomeVFSSocket *socket);
GnomeVFSResult      gnome_vfs_socket_buffer_destroy     (GnomeVFSSocketBuffer *socket_buffer,
                                                         gboolean close_socket,
                                                         GnomeVFSCancellation *cancellation);
GnomeVFSResult      gnome_vfs_socket_buffer_read        (GnomeVFSSocketBuffer *socket_buffer,
                                                         gpointer buffer,
                                                         GnomeVFSFileSize bytes,
                                                         GnomeVFSFileSize *bytes_read,
                                                         GnomeVFSCancellation *cancellation);
GnomeVFSResult      gnome_vfs_socket_buffer_peekc       (GnomeVFSSocketBuffer *socket_buffer,
                                                         char *character,
                                                         GnomeVFSCancellation *cancellation);
GnomeVFSResult      gnome_vfs_socket_buffer_write       (GnomeVFSSocketBuffer *socket_buffer,
                                                         gconstpointer buffer,
                                                         GnomeVFSFileSize bytes,
                                                         GnomeVFSFileSize *bytes_written,
                                                         GnomeVFSCancellation *cancellation);
GnomeVFSResult      gnome_vfs_socket_buffer_flush       (GnomeVFSSocketBuffer *socket_buffer,
                                                         GnomeVFSCancellation *cancellation);
GnomeVFSResult      gnome_vfs_socket_buffer_read_until  (GnomeVFSSocketBuffer *socket_buffer,
                                                         gpointer buffer,
                                                         GnomeVFSFileSize bytes,
                                                         gconstpointer boundary,
                                                         GnomeVFSFileSize boundary_len,
                                                         GnomeVFSFileSize *bytes_read,
                                                         gboolean *got_boundary,
                                                         GnomeVFSCancellation *cancellation);

Description

The GnomeVFSSocketBuffer functions are very similar to the GnomeVFSSocket ones. The only difference is that all input/output is done through an internally managed buffer. This might increase I/O performance as well as give you the possibility to use some convenient functions like gnome_vfs_socket_buffer_peekc and gnome_vfs_socket_buffer_read_until.

You can manually force all internally buffered data to get written with gnome_vfs_socket_buffer_flush.

Details

GnomeVFSSocketBuffer

typedef struct GnomeVFSSocketBuffer GnomeVFSSocketBuffer;

A handle to a socket buffer. A socket buffer is a temporary in-memory storage for data that is read from or written to a GnomeVFSSocket.


gnome_vfs_socket_buffer_new ()

GnomeVFSSocketBuffer* gnome_vfs_socket_buffer_new       (GnomeVFSSocket *socket);

Create a socket buffer around socket. A buffered socket allows data to be poked at without reading it as it will be buffered. A future read will retrieve the data again.

socket :

socket to be buffered.

Returns :

a newly allocated GnomeVFSSocketBuffer.

gnome_vfs_socket_buffer_destroy ()

GnomeVFSResult      gnome_vfs_socket_buffer_destroy     (GnomeVFSSocketBuffer *socket_buffer,
                                                         gboolean close_socket,
                                                         GnomeVFSCancellation *cancellation);

Free the socket buffer.

socket_buffer :

buffered socket to destroy.

close_socket :

if TRUE, the socket being buffered will be closed.

cancellation :

handle allowing cancellation of the operation.

Returns :

GnomeVFSResult indicating the success of the operation.

gnome_vfs_socket_buffer_read ()

GnomeVFSResult      gnome_vfs_socket_buffer_read        (GnomeVFSSocketBuffer *socket_buffer,
                                                         gpointer buffer,
                                                         GnomeVFSFileSize bytes,
                                                         GnomeVFSFileSize *bytes_read,
                                                         GnomeVFSCancellation *cancellation);

Read bytes bytes of data from the socket into socket_buffer.

socket_buffer :

buffered socket to read data from.

buffer :

allocated buffer of at least bytes bytes to be read into.

bytes :

number of bytes to read from socket_buffer into buffer.

bytes_read :

pointer to a GnomeVFSFileSize, will contain the number of bytes actually read from the socket_buffer on return.

cancellation :

handle allowing cancellation of the operation.

Returns :

GnomeVFSResult indicating the success of the operation.

gnome_vfs_socket_buffer_peekc ()

GnomeVFSResult      gnome_vfs_socket_buffer_peekc       (GnomeVFSSocketBuffer *socket_buffer,
                                                         char *character,
                                                         GnomeVFSCancellation *cancellation);

Peek at the next character in socket_buffer without actually reading the character in. The next read will retrieve c (as well as any following data if requested).

socket_buffer :

the socket buffer to read from.

character :

pointer to a char, will contain a character on return from a successful "peek".

cancellation :

handle allowing cancellation of the operation.

Returns :

GnomeVFSResult indicating the success of the operation.

gnome_vfs_socket_buffer_write ()

GnomeVFSResult      gnome_vfs_socket_buffer_write       (GnomeVFSSocketBuffer *socket_buffer,
                                                         gconstpointer buffer,
                                                         GnomeVFSFileSize bytes,
                                                         GnomeVFSFileSize *bytes_written,
                                                         GnomeVFSCancellation *cancellation);

Write bytes bytes of data from buffer to socket_buffer.

socket_buffer :

buffered socket to write data to.

buffer :

data to write to the socket_buffer.

bytes :

number of bytes to write from buffer to socket_buffer.

bytes_written :

pointer to a GnomeVFSFileSize, will contain the number of bytes actually written to the socket_buffer on return.

cancellation :

handle allowing cancellation of the operation.

Returns :

GnomeVFSResult indicating the success of the operation.

gnome_vfs_socket_buffer_flush ()

GnomeVFSResult      gnome_vfs_socket_buffer_flush       (GnomeVFSSocketBuffer *socket_buffer,
                                                         GnomeVFSCancellation *cancellation);

Write all outstanding data to socket_buffer.

socket_buffer :

buffer to flush.

cancellation :

handle allowing cancellation of the operation.

Returns :

GnomeVFSResult indicating the success of the operation.

gnome_vfs_socket_buffer_read_until ()

GnomeVFSResult      gnome_vfs_socket_buffer_read_until  (GnomeVFSSocketBuffer *socket_buffer,
                                                         gpointer buffer,
                                                         GnomeVFSFileSize bytes,
                                                         gconstpointer boundary,
                                                         GnomeVFSFileSize boundary_len,
                                                         GnomeVFSFileSize *bytes_read,
                                                         gboolean *got_boundary,
                                                         GnomeVFSCancellation *cancellation);

Read up to bytes bytes of data from the socket_buffer into buffer until boundary is reached. got_boundary will be set accordingly.

Note that if bytes is smaller than boundary_len there is no way to detected the boundary! So if you want to make sure that every boundary is found (in a loop maybe) assure that bytes is at least as big as boundary_len.

socket_buffer :

buffered socket to read data from.

buffer :

allocated buffer of at least bytes bytes to be read into.

bytes :

maximum number of bytes to read from socket_buffer into buffer.

boundary :

the boundary until which is read.

boundary_len :

the length of the boundary.

bytes_read :

pointer to a GnomeVFSFileSize, will contain the number of bytes actually read from the socket_buffer on return.

got_boundary :

pointer to a gboolean which will be TRUE if the boundary was found or FALSE otherwise.

cancellation :

handle allowing cancellation of the operation.

Returns :

GnomeVFSResult indicating the success of the operation.

Since 2.8

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