| ZIP_FILE_EXTRA_FIELDS_COUNT(3) | Library Functions Manual | ZIP_FILE_EXTRA_FIELDS_COUNT(3) |
NAME
zip_file_extra_fields_count,
zip_file_extra_fields_count_by_id —
count extra fields for file in zip
LIBRARY
libzip (-lzip)
SYNOPSIS
#include
<zip.h>
zip_int16_t
zip_file_extra_fields_count(zip_t
*archive, zip_uint64_t
index, zip_flags_t
flags);
zip_int16_t
zip_file_extra_fields_count_by_id(zip_t
*archive, zip_uint64_t
index, zip_uint16_t
extra_field_id,
zip_flags_t flags);
DESCRIPTION
The
zip_file_extra_fields_count()
function counts the extra fields for the file at position
index in the zip archive.
The following flags are supported:
ZIP_FL_CENTRAL- Count extra fields from the archive's central directory.
ZIP_FL_LOCAL- Count extra fields from the local file headers.
ZIP_FL_UNCHANGED- Count the original unchanged extra fields, ignoring any changes made.
The
zip_file_extra_fields_count_by_id()
function counts the extra fields with ID (two-byte signature)
extra_field_id. The other arguments are the same as
for zip_file_extra_fields_count().
Extra fields that are the same in the central directory and the
local file header are merged into one. Therefore, the counts with
ZIP_FL_CENTRAL and
ZIP_FL_LOCAL do not need to add up to the same value
as when given ZIP_FL_CENTRAL|ZIP_FL_LOCAL at the
same time.
RETURN VALUES
Upon successful completion, the requested number of extra fields is returned. Otherwise, -1 is returned and the error code in archive is set to indicate the error.
ERRORS
zip_file_extra_fields_count() and
zip_file_extra_fields_count_by_id() fail if:
- [
ZIP_ER_NOENT] - index is not a valid file index in archive.
SEE ALSO
libzip(3), zip_file_extra_field_delete(3), zip_file_extra_field_get(3), zip_file_extra_field_set(3)
HISTORY
zip_file_extra_fields_count() and
zip_file_extra_fields_count_by_id() were added in
libzip 0.11.
AUTHORS
Dieter Baron <dillo@nih.at> and Thomas Klausner <wiz@gatalith.at>
| December 18, 2017 | Linux 6.11.5-arch1-1 |