libcoopgamma_context_unmarshal.3

.TH LIBCOOPGAMMA_CONTEXT_UNMARSHAL 3 LIBCOOPGAMMA
.SH "NAME"
libcoopgamma_context_unmarshal - Unmarshal a libcoopgamma_context_t
.SH "SYNOPSIS"
.nf
#include <libcoopgamma.h>

int libcoopgamma_context_unmarshal(libcoopgamma_context_t *restrict \fIthis\fP,
                                   void *restrict \fIbuffer\fP, size_t *restrict \fIn\fP);
.fi
.P
Link with
.IR -lcoopgamma .
.SH "DESCRIPTION"
The
.BR libcoopgamma_context_unmarshal ()
function unmarshals
.I this
from a
.I buffer .
The number of read bytes from
.I buffer
is stored in
.I *n
on success.
.P
None if the parameters may be
.IR NULL .
.I this
does not have to be initialised.
.P
On failure,
.I this
should be deinitialised using
.BR libcoopgamma_context_destroy (3).
.P
Undefined behaviour is invoked if the
beginning of
.I buffer
does not contain data stored by
.BR libcoopgamma_context_marshal (3).
.SH "RETURN VALUES"
The
.BR libcoopgamma_context_unmarshal ()
function returns one of the following
values:
.TP
.IR LIBCOOPGAMMA_SUCCESS " (= 0)"
The function was successful.
.TP
.IR LIBCOOPGAMMA_INCOMPATIBLE_DOWNGRADE " (> 0)"
The data in
.I buffer
was stored by an earlier version of
.BR libcoopgamma (7)
that is no longer supported.
.TP
.IR LIBCOOPGAMMA_INCOMPATIBLE_UPGRADE " (> 0)"
The data in
.I buffer
was stored by a newer version of
.BR libcoopgamma (7)
that stores the data in an incompatible format.
.TP
.IR LIBCOOPGAMMA_ERRNO_SET "(= -1)"
An other error was encountered.
.I errno
has been set appropriately.
.SH "ERROR"
The
.BR libcoopgamma_context_marshal ()
function may fail, and returned
.I LIBCOOPGAMMA_ERRNO_SET
for any reason specified for
.BR malloc (3).
.SH "SEE ALSO"
.BR libcoopgamma_context_destroy (3),
.BR libcoopgamma_context_marshal (3),
.BR libcoopgamma_ramps_unmarshal (3),
.BR libcoopgamma_filter_unmarshal (3),
.BR libcoopgamma_crtc_info_unmarshal (3),
.BR libcoopgamma_filter_query_unmarshal (3),
.BR libcoopgamma_queried_filter_unmarshal (3),
.BR libcoopgamma_filter_table_unmarshal (3),
.BR libcoopgamma_error_unmarshal (3),
.BR libcoopgamma_async_context_unmarshal (3)