table of contents
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 <tk@giga.or.at>
December 18, 2017 | Linux 5.14.0-427.18.1.el9_4.x86_64 |