.\" zip_file_extra_field_delete.mdoc \-- delete extra field for file in zip
.\" Copyright (C) 2012 Dieter Baron and Thomas Klausner
.\"
.\" This file is part of libzip, a library to manipulate ZIP files.
.\" The authors can be contacted at <libzip@nih.at>
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.TH ZIP_FILE_EXTRA_FIELD_DELETE 3 "June 23, 2012" NiH
.SH "NAME"
zip_file_extra_field_delete , \- .Nm zip_file_extra_field_delete_by_id
delete extra field for file in zip
.SH "LIBRARY"
libzip (-lzip)
.SH "SYNOPSIS"
#include <zip.h>
.PP
int
zip_file_extra_field_delete(struct zip *archive, zip_uint64_t index); \
"zip_uint16_t extra_field_index" "zip_flags_t flags"
.PP
int
zip_file_extra_field_delete_by_id(struct zip *archive, zip_uint64_t index); \
"zip_uint16_t extra_field_id" "zip_uint16_t extra_field_index" "zip_flags_t flags"
.SH "DESCRIPTION"
The
zip_file_extra_field_delete
function deletes the extra field with index
\fBextra_field_index\fR
for the file at position
\fBindex\fR
in the zip archive.
.PP
If
\fBindex\fR
is
\fBZIP_EXTRA_FIELD_ALL,\fR
then all extra fields will be deleted.
.PP
The following flags are supported:
.RS
.TP 18
\fBZIP_FL_CENTRAL\fR
Delete only extra fields from the archive's central directory.
.TP 18
\fBZIP_FL_LOCAL\fR
Delete only extra fields from the local file headers.
.RE
.PP
The
zip_file_extra_field_delete_by_id
function deletes the extra field with ID (two-byte signature)
\fBextra_field_id\fR
and index
\fBextra_field_index\fR
(in other words, the
\fBextra_field_index'th\fR
extra field with ID
\fBextra_field_id )\fR
The other arguments are the same as for
zip_file_extra_field_delete
\fB( ZIP_EXTRA_FIELD_ALL\fR
will delete all extra fields the specified ID).
.SH "RETURN VALUES"
Upon successful completion 0 is returned.
Otherwise, \-1 is returned and the error code in
\fBarchive\fR
is set to indicate the error.
.SH "ERRORS"
zip_file_extra_field_delete
and
zip_file_extra_field_delete_by_id
fail if:
.RS
.TP 4
[ZIP_ER_NOENT]
\fBindex\fR
is not a valid file index in
\fBarchive.\fR
.RE
.SH "SEE ALSO"
libzip(3),
zip_file_extra_field_get(3),
zip_file_extra_field_set(3),
zip_file_extra_fields_count(3)
.SH "AUTHORS"

Dieter Baron <dillo@nih.at>
and
Thomas Klausner <tk@giga.or.at>