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ZIP_FILE_EXTRA_FIELDS_COUNT(3)                        Library Functions Manual

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>

NiH                            February 20, 2013
                                                ZIP_FILE_EXTRA_FIELDS_COUNT(3)