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(
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 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>