perl58delta.1

视频监控网络部分的协议ddns,的模块的实现代码,请大家大胆指正.

and directories in an easy, portable, and secure way.  See File::Temp.
[561+]
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\&\f(CW\*(C`Filter::Util::Call\*(C'\fR, by Paul Marquess, provides you with the
framework to write \fIsource filters\fR in Perl.  For most uses, the
frontend Filter::Simple is to be preferred.  See Filter::Util::Call.
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\&\f(CW\*(C`if\*(C'\fR, by Ilya Zakharevich, is a new pragma for conditional inclusion
of modules.
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libnet, by Graham Barr, is a collection of perl5 modules related
to network programming.  See Net::FTP, Net::NNTP, Net::Ping
(not part of libnet, but related), Net::POP3, Net::SMTP,
and Net::Time.
.Sp
Perl installation leaves libnet unconfigured; use \fIlibnetcfg\fR
to configure it.
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\&\f(CW\*(C`List::Util\*(C'\fR, by Graham Barr, is a selection of general-utility
list subroutines, such as \fIsum()\fR, \fImin()\fR, \fIfirst()\fR, and \fIshuffle()\fR.
See List::Util.
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\&\f(CW\*(C`Locale::Constants\*(C'\fR, \f(CW\*(C`Locale::Country\*(C'\fR, \f(CW\*(C`Locale::Currency\*(C'\fR
\&\f(CW\*(C`Locale::Language\*(C'\fR, and Locale::Script, by Neil Bowers, have
been added.  They provide the codes for various locale standards, such
as \*(L"fr\*(R" for France, \*(L"usd\*(R" for \s-1US\s0 Dollar, and \*(L"ja\*(R" for Japanese.
.Sp
.Vb 1
\&    use Locale::Country;
\&
\&    $country = code2country(\*(Aqjp\*(Aq);               # $country gets \*(AqJapan\*(Aq
\&    $code    = country2code(\*(AqNorway\*(Aq);           # $code gets \*(Aqno\*(Aq
.Ve
.Sp
See Locale::Constants, Locale::Country, Locale::Currency,
and Locale::Language.
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\&\f(CW\*(C`Locale::Maketext\*(C'\fR, by Sean Burke, is a localization framework.  See
Locale::Maketext, and Locale::Maketext::TPJ13.  The latter is an
article about software localization, originally published in The Perl
Journal #13, and republished here with kind permission.
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\&\f(CW\*(C`Math::BigRat\*(C'\fR for big rational numbers, to accompany Math::BigInt and
Math::BigFloat, from Tels.  See Math::BigRat.
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\&\f(CW\*(C`Memoize\*(C'\fR can make your functions faster by trading space for time,
from Mark-Jason Dominus.  See Memoize.
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\&\f(CW\*(C`MIME::Base64\*(C'\fR, by Gisle Aas, allows you to encode data in base64,
as defined in \s-1RFC\s0 2045 \- \fI\s-1MIME\s0 (Multipurpose Internet Mail
Extensions)\fR.
.Sp
.Vb 1
\&    use MIME::Base64;
\&
\&    $encoded = encode_base64(\*(AqAladdin:open sesame\*(Aq);
\&    $decoded = decode_base64($encoded);
\&
\&    print $encoded, "\en"; # "QWxhZGRpbjpvcGVuIHNlc2FtZQ=="
.Ve
.Sp
See MIME::Base64.
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\&\f(CW\*(C`MIME::QuotedPrint\*(C'\fR, by Gisle Aas, allows you to encode data
in quoted-printable encoding, as defined in \s-1RFC\s0 2045 \- \fI\s-1MIME\s0
(Multipurpose Internet Mail Extensions)\fR.
.Sp
.Vb 1
\&    use MIME::QuotedPrint;
\&
\&    $encoded = encode_qp("\exDE\exAD\exBE\exEF");
\&    $decoded = decode_qp($encoded);
\&
\&    print $encoded, "\en"; # "=DE=AD=BE=EF\en"
\&    print $decoded, "\en"; # "\exDE\exAD\exBE\exEF\en"
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.Sp
See also PerlIO::via::QuotedPrint.
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\&\f(CW\*(C`NEXT\*(C'\fR, by Damian Conway, is a pseudo-class for method redispatch.
See \s-1NEXT\s0.
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\&\f(CW\*(C`open\*(C'\fR is a new pragma for setting the default I/O layers
for \fIopen()\fR.
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\&\f(CW\*(C`PerlIO::scalar\*(C'\fR, by Nick Ing-Simmons, provides the implementation
of \s-1IO\s0 to \*(L"in memory\*(R" Perl scalars as discussed above.  It also serves
as an example of a loadable PerlIO layer.  Other future possibilities
include PerlIO::Array and PerlIO::Code.  See PerlIO::scalar.
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\&\f(CW\*(C`PerlIO::via\*(C'\fR, by Nick Ing-Simmons, acts as a PerlIO layer and wraps
PerlIO layer functionality provided by a class (typically implemented
in Perl code).
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\&\f(CW\*(C`PerlIO::via::QuotedPrint\*(C'\fR, by Elizabeth Mattijsen, is an example
of a \f(CW\*(C`PerlIO::via\*(C'\fR class:
.Sp
.Vb 2
\&    use PerlIO::via::QuotedPrint;
\&    open($fh,">:via(QuotedPrint)",$path);
.Ve
.Sp
This will automatically convert everything output to \f(CW$fh\fR to
Quoted-Printable.  See PerlIO::via and PerlIO::via::QuotedPrint.
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\&\f(CW\*(C`Pod::ParseLink\*(C'\fR, by Russ Allbery, has been added,
to parse L<> links in pods as described in the new
perlpodspec.
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\&\f(CW\*(C`Pod::Text::Overstrike\*(C'\fR, by Joe Smith, has been added.
It converts \s-1POD\s0 data to formatted overstrike text.
See Pod::Text::Overstrike. [561+]
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\&\f(CW\*(C`Scalar::Util\*(C'\fR is a selection of general-utility scalar subroutines,
such as \fIblessed()\fR, \fIreftype()\fR, and \fItainted()\fR.  See Scalar::Util.
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\&\f(CW\*(C`sort\*(C'\fR is a new pragma for controlling the behaviour of \fIsort()\fR.
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\&\f(CW\*(C`Storable\*(C'\fR gives persistence to Perl data structures by allowing the
storage and retrieval of Perl data to and from files in a fast and
compact binary format.  Because in effect Storable does serialisation
of Perl data structures, with it you can also clone deep, hierarchical
datastructures.  Storable was originally created by Raphael Manfredi,
but it is now maintained by Abhijit Menon-Sen.  Storable has been
enhanced to understand the two new hash features, Unicode keys and
restricted hashes.  See Storable.
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\&\f(CW\*(C`Switch\*(C'\fR, by Damian Conway, has been added.  Just by saying
.Sp
.Vb 1
\&    use Switch;
.Ve
.Sp
you have \f(CW\*(C`switch\*(C'\fR and \f(CW\*(C`case\*(C'\fR available in Perl.
.Sp
.Vb 1
\&    use Switch;
\&
\&    switch ($val) {
\&
\&                case 1          { print "number 1" }
\&                case "a"        { print "string a" }
\&                case [1..10,42] { print "number in list" }
\&                case (@array)   { print "number in list" }
\&                case /\ew+/      { print "pattern" }
\&                case qr/\ew+/    { print "pattern" }
\&                case (%hash)    { print "entry in hash" }
\&                case (\e%hash)   { print "entry in hash" }
\&                case (\e&sub)    { print "arg to subroutine" }
\&                else            { print "previous case not true" }
\&    }
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.Sp
See Switch.
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\&\f(CW\*(C`Test::More\*(C'\fR, by Michael Schwern, is yet another framework for writing
test scripts, more extensive than Test::Simple.  See Test::More.
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\&\f(CW\*(C`Test::Simple\*(C'\fR, by Michael Schwern, has basic utilities for writing
tests.   See Test::Simple.
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\&\f(CW\*(C`Text::Balanced\*(C'\fR, by Damian Conway, has been added, for extracting
delimited text sequences from strings.
.Sp
.Vb 1
\&    use Text::Balanced \*(Aqextract_delimited\*(Aq;
\&
\&    ($a, $b) = extract_delimited("\*(Aqnever say never\*(Aq, he never said", "\*(Aq", \*(Aq\*(Aq);
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\&\f(CW$a\fR will be \*(L"'never say never'\*(R", \f(CW$b\fR will be ', he never said'.
.Sp
In addition to \fIextract_delimited()\fR, there are also \fIextract_bracketed()\fR,
\&\fIextract_quotelike()\fR, \fIextract_codeblock()\fR, \fIextract_variable()\fR,
\&\fIextract_tagged()\fR, \fIextract_multiple()\fR, \fIgen_delimited_pat()\fR, and
\&\fIgen_extract_tagged()\fR.  With these, you can implement rather advanced
parsing algorithms.  See Text::Balanced.
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\&\f(CW\*(C`threads\*(C'\fR, by Arthur Bergman, is an interface to interpreter threads.
Interpreter threads (ithreads) is the new thread model introduced in
Perl 5.6 but only available as an internal interface for extension
writers (and for Win32 Perl for \f(CW\*(C`fork()\*(C'\fR emulation).  See threads,
threads::shared, and perlthrtut.
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\&\f(CW\*(C`threads::shared\*(C'\fR, by Arthur Bergman, allows data sharing for
interpreter threads.  See threads::shared.
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\&\f(CW\*(C`Tie::File\*(C'\fR, by Mark-Jason Dominus, associates a Perl array with the
lines of a file.  See Tie::File.
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\&\f(CW\*(C`Tie::Memoize\*(C'\fR, by Ilya Zakharevich, provides on-demand loaded hashes.
See Tie::Memoize.
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\&\f(CW\*(C`Tie::RefHash::Nestable\*(C'\fR, by Edward Avis, allows storing hash
references (unlike the standard Tie::RefHash)  The module is contained
within Tie::RefHash.  See Tie::RefHash.
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\&\f(CW\*(C`Time::HiRes\*(C'\fR, by Douglas E. Wegscheid, provides high resolution
timing (ualarm, usleep, and gettimeofday).  See Time::HiRes.
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\&\f(CW\*(C`Unicode::UCD\*(C'\fR offers a querying interface to the Unicode Character
Database.  See Unicode::UCD.
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\&\f(CW\*(C`Unicode::Collate\*(C'\fR, by \s-1SADAHIRO\s0 Tomoyuki, implements the \s-1UCA\s0
(Unicode Collation Algorithm) for sorting Unicode strings.
See Unicode::Collate.
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\&\f(CW\*(C`Unicode::Normalize\*(C'\fR, by \s-1SADAHIRO\s0 Tomoyuki, implements the various
Unicode normalization forms.  See Unicode::Normalize.
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\&\f(CW\*(C`XS::APItest\*(C'\fR, by Tim Jenness, is a test extension that exercises \s-1XS\s0
APIs.  Currently only \f(CW\*(C`printf()\*(C'\fR is tested: how to output various
basic data types from \s-1XS\s0.
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\&\f(CW\*(C`XS::Typemap\*(C'\fR, by Tim Jenness, is a test extension that exercises
\&\s-1XS\s0 typemaps.  Nothing gets installed, but the code is worth studying
for extension writers.
.Sh "Updated And Improved Modules and Pragmata"
.IX Subsection "Updated And Improved Modules and Pragmata"
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The following independently supported modules have been updated to the
newest versions from \s-1CPAN:\s0 \s-1CGI\s0, \s-1CPAN\s0, DB_File, File::Spec, File::Temp,
Getopt::Long, Math::BigFloat, Math::BigInt, the podlators bundle
(Pod::Man, Pod::Text), Pod::LaTeX [561+], Pod::Parser, Storable,
Term::ANSIColor, Test, Text\-Tabs+Wrap.
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\&\fIattributes::reftype()\fR now works on tied arguments.
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AutoLoader can now be disabled with \f(CW\*(C`no AutoLoader;\*(C'\fR.
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B::Deparse has been significantly enhanced by Robin Houston.  It can
now deparse almost all of the standard test suite (so that the tests
still succeed).  There is a make target \*(L"test.deparse\*(R" for trying this
out.
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Carp now has better interface documentation, and the \f(CW@CARP_NOT\fR
interface has been added to get optional control over where errors
are reported independently of \f(CW@ISA\fR, by Ben Tilly.
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Class::Struct can now define the classes in compile time.
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Class::Struct now assigns the array/hash element if the accessor
is called with an array/hash element as the \fBsole\fR argument.
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The return value of \fICwd::fastcwd()\fR is now tainted.
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Data::Dumper now has an option to sort hashes.
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Data::Dumper now has an option to dump code references
using B::Deparse.
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DB_File now supports newer Berkeley \s-1DB\s0 versions, among
other improvements.
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Devel::Peek now has an interface for the Perl memory statistics
(this works only if you are using perl's malloc, and if you have
compiled with debugging).
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The English module can now be used without the infamous performance
hit by saying
.Sp
.Vb 1
\&        use English \*(Aq\-no_match_vars\*(Aq;
.Ve
.Sp
(Assuming, of course, that you don't need the troublesome variables
\&\f(CW\*(C`$\`\*(C'\fR, \f(CW$&\fR, or \f(CW\*(C`$\*(Aq\*(C'\fR.)  Also, introduced \f(CW@LAST_MATCH_START\fR and
\&\f(CW@LAST_MATCH_END\fR English aliases for \f(CW\*(C`@\-\*(C'\fR and \f(CW\*(C`@+\*(C'\fR.
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ExtUtils::MakeMaker has been significantly cleaned up and fixed.
The enhanced version has also been backported to earlier releases
of Perl and submitted to \s-1CPAN\s0 so that the earlier releases can
enjoy the fixes.
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The arguments of \fIWriteMakefile()\fR in Makefile.PL are now checked
for sanity much more carefully than before.  This may cause new
warnings when modules are being installed.  See ExtUtils::MakeMaker
for more details.
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ExtUtils::MakeMaker now uses File::Spec internally, which hopefully
leads to better portability.
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Fcntl, Socket, and Sys::Syslog have been rewritten by Nicholas Clark
to use the new-style constant dispatch section (see ExtUtils::Constant).
This means that they will be more robust and hopefully faster.
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File::Find now \fIchdir()\fRs correctly when chasing symbolic links. [561]
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File::Find now has pre\- and post-processing callbacks.  It also
correctly changes directories when chasing symbolic links.  Callbacks
(naughtily) exiting with \*(L"next;\*(R" instead of \*(L"return;\*(R" now work.