OSSP::uuid(3perl)

NAME
OSSP::uuid - OSSP uuid Perl Binding

DESCRIPTION
OSSP OSSP::uuid is a ISO-C:1999 application programming interface (API) and corresponding command line interface (CLI) for the generation of RFC 9562, ISO/IEC 11578:1996 and IETF RFC-4122 compliant Universally Unique Identifier (UUID). It supports DCE 1.1 variant UUIDs of version 1 (time and node based), version 3 (name based, MD5), version 4 (random number based) and version 5 (name based, SHA-1). Additional API bindings are provided for the Perl:5 language. Optional backward compatibility exists for the ISO-C DCE-1.1 and Perl Data::UUID APIs.

OSSP::uuid is the Perl binding to the OSSP uuid API. Three variants are provided:

  TIE-STYLE API
The TIE-style API is a functionality-reduced wrapper around the OO-style API and intended for very high-level convenience programming:

    use OSSP::uuid;
    tie my $uuid, 'OSSP::uuid::tie', $mode, ...;
    $uuid = [ $mode, ... ];
    print "UUID=$uuid\n";
    untie $uuid;

  OO-STYLE API
The OO-style API is a wrapper around the C-style API and intended for high-level regular programming.

    use OSSP::uuid;
    my $uuid = new OSSP::uuid;
    $uuid->load ($name);
    $uuid->make ($mode, ...);
    $result = $uuid->isnil();
    $result = $uuid->compare($uuid2);
    $uuid->import($fmt, $data_ptr);
    $data_ptr = $uuid->export($fmt);
    [(]$str[, $rc)] = $uuid->error();
    $ver = $uuid->version();
    undef $uuid;

Additionally, the strings "v1", "v3", "v4", "v5", "v6", "v7", and "mc" can be used in $mode and the strings "bin", "str", and "txt" $fmt.

  C-STYLE API
The C-style API is a direct mapping of the OSSP uuid ISO-C API to Perl and is intended for low-level programming. See uuid(3) for a description of the functions and their expected arguments.

    use OSSP::uuid qw(:all);
    my $uuid; $rc = uuid_create($uuid);
    $rc = uuid_load($uuid, $name);
    $rc = uuid_make($uuid, $mode, ...);
    $rc = uuid_isnil($uuid, $result);
    $rc = uuid_ismax($uuid, $result);
    $rc = uuid_compare($uuid, $uuid2, $result);
    $rc = uuid_import($uuid, $fmt, $data_ptr, $data_len);
    $rc = uuid_export($uuid, $fmt, $data_ptr, $data_len);
    $str = uuid_error($rc);
    $ver = uuid_version();
    $rc = uuid_destroy($uuid);

Additionally, the following constants are exported for use in $rc, $mode, $fmt, and $ver: UUID_VERSION, UUID_LEN_BIN, UUID_LEN_STR, UUID_RC_OK, UUID_RC_ARG, UUID_RC_MEM, UUID_RC_SYS, UUID_RC_INT, UUID_RC_IMP, UUID_MAKE_V1, UUID_MAKE_V3, UUID_MAKE_V4, UUID_MAKE_V5, UUID_MAKE_MC, UUID_MAKE_V6, UUID_MAKE_V7, UUID_FMT_BIN, UUID_FMT_STR, UUID_FMT_SIV, UUID_FMT_TXT.

EXAMPLES
The following two examples create the version 3 UUID 02d9e6d5-9467-382e-8f9b-9300a64ac3cd, both via the OO-style and the C-style API. Error handling is omitted here for easier reading, but has to be added for production-quality code.

    #   TIE-style API (very high-level)
    use OSSP::uuid;
    tie my $uuid, 'OSSP::uuid::tie';
    $uuid = [ "v1" ];
    print "UUIDs: $uuid, $uuid, $uuid\n";
    $uuid = [ "v3", "ns:URL", "http://www.ossp.org/" ];
    print "UUIDs: $uuid, $uuid, $uuid\n";
    untie $uuid;

    #   OO-style API (high-level)
    use OSSP::uuid;
    my $uuid    = new OSSP::uuid;
    my $uuid_ns = new OSSP::uuid;
    $uuid_ns->load("ns:URL");
    $uuid->make("v3", $uuid_ns, "http://www.ossp.org/");
    undef $uuid_ns;
    my $str = $uuid->export("str");
    undef $uuid;
    print "$str\n";

    #   C-style API (low-level)
    use OSSP::uuid qw(:all);
    my $uuid;    uuid_create($uuid);
    my $uuid_ns; uuid_create($uuid_ns);
    uuid_load($uuid_ns, "ns:URL");
    uuid_make($uuid, UUID_MAKE_V3, $uuid_ns, "http://www.ossp.org/");
    uuid_destroy($uuid_ns);
    my $str; uuid_export($uuid, UUID_FMT_STR, $str, undef);
    uuid_destroy($uuid);
    print "$str\n";

SEE ALSO
uuid(1), uuid-config(1), uuid(3)

HISTORY
The Perl binding OSSP::uuid to OSSP uuid was implemented in November 2004 by Ralf S. Engelschall <rse@engelschall.com>.