man/zip_register_cancel_callback_with_state.man

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.\" zip_register_cancel_callback_with_state.mdoc -- allow cancelling during zip_close
.\" Copyright (C) 2021 Dieter Baron and Thomas Klausner
.\"
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.TH "ZIP_REGISTER_CANCEL_CALLBACK_WITH_STATE" "3" "April 6, 2021" "NiH" "Library Functions Manual"
.nh
.if n .ad l
.SH "NAME"
\fBzip_register_cancel_callback_with_state\fR
\- allow cancelling during zip_close
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
\fB#include <zip.h>\fR
.sp
\fItypedef void (*zip_cancel_callback)(zip_t *, double, void *);\fR
.sp
\fIvoid\fR
.br
.PD 0
.HP 4n
\fBzip_register_cancel_callback_with_state\fR(\fIzip_t\ *archive\fR, \fIzip_cancel_callback\ callback\fR, \fIvoid\ (*ud_free)(void\ *)\fR, \fIvoid\ *ud\fR);
.PD
.SH "DESCRIPTION"
This function can be used to cancel writing of a zip archive during
zip_close(3).
.PP
The
\fBzip_register_cancel_callback_with_state\fR()
function registers a callback function
\fIcallback\fR
for the zip archive
\fIarchive\fR.
The
\fIud_free\fR
function is called during cleanup for deleting the userdata supplied in
\fIud\fR.
.PP
The callback function is called during
zip_close(3)
in regular intervals (after every zip archive entry that's completely
written to disk, and while writing data for entries) with zip archive
\fIarchive\fR,
the current progress state (see
zip_register_progress_callback_with_state(3))
as a
\fIdouble\fR,
and the user-provided user-data
\fIud\fR
as arguments.
The progress state is a
\fIdouble\fR
in the range from 0.0 to 1.0.
.PP
The callback function should be fast, since it will be called often.
.SH "SEE ALSO"
libzip(3),
zip_close(3),
zip_register_progress_callback_with_state(3)
.SH "HISTORY"
\fBzip_register_cancel_callback_with_state\fR()
was added in libzip 1.6.0.
.SH "AUTHORS"
Dieter Baron <\fIdillo@nih.at\fR>
and
Thomas Klausner <\fItk@giga.or.at\fR>