zip_file_extra_fields_count
NAME
zip_file_extra_fields_count,
zip_file_extra_fields_count_by_id —
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
Thezip_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.