ZIP_FILE_EXTRA_FIELDS... BSD Library Functions Manual ZIP_FILE_EXTRA_FIELDS...
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 di-
rectory.
ZIP_FL_LOCAL Count extra fields from the local file headers.
ZIP_FL_UNCHANGED Count the original unchanged extra fields, ignor-
ing 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 re-
turned. 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>
BSD December 18, 2017 BSD
Generated by dwww version 1.15 on Sat Jun 29 11:35:10 CEST 2024.