ZIP_FILE_EXTRA_FIELDS_COUNT(3)ZIP_FILE_EXTRA_FIELDS_COUNT(3)NAMEzip_file_extra_fields_count , - .Nm 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(struct zip *archive,
zip_uint64_t index); "zip_flags_t flags"
zip_int16_t zip_file_extra_fields_count_by_id(struct zip *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 head‐
ers.
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.
ERRORSzip_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 ALSOlibzip(3), zip_file_extra_field_delete(3), zip_file_extra_field_get(3),
zip_file_extra_field_set(3)AUTHORS
Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>
NiH February 20, 2013ZIP_FILE_EXTRA_FIELDS_COUNT(3)
