NAME

       zip_file_extra_fields_count,  zip_file_extra_fields_count_by_id  -  count extra fields for
       file in zip

LIBRARY

       libzip (-lzip)

SYNOPSIS

       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)

AUTHORS

       Dieter Baron <dillo@nih.at> and Thomas Klausner <tk@giga.or.at>