perl595delta.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.

example, \f(CW\*(C`prototype(\*(AqCORE::rmdir\*(Aq)\*(C'\fR). (Rafael)
.Sh "\s-1UNITCHECK\s0 blocks"
.IX Subsection "UNITCHECK blocks"
\&\f(CW\*(C`UNITCHECK\*(C'\fR, a new special code block has been introduced, in addition to
\&\f(CW\*(C`BEGIN\*(C'\fR, \f(CW\*(C`CHECK\*(C'\fR, \f(CW\*(C`INIT\*(C'\fR and \f(CW\*(C`END\*(C'\fR.
.PP
\&\f(CW\*(C`CHECK\*(C'\fR and \f(CW\*(C`INIT\*(C'\fR blocks, while useful for some specialized purposes,
are always executed at the transition between the compilation and the
execution of the main program, and thus are useless whenever code is
loaded at runtime. On the other hand, \f(CW\*(C`UNITCHECK\*(C'\fR blocks are executed
just after the unit which defined them has been compiled. See perlmod
for more information. (Alex Gough)
.Sh "\fIreadpipe()\fP is now overridable"
.IX Subsection "readpipe() is now overridable"
The built-in function \fIreadpipe()\fR is now overridable. Overriding it permits
also to override its operator counterpart, \f(CW\*(C`qx//\*(C'\fR (a.k.a. \f(CW\*(C`\`\`\*(C'\fR).
Moreover, it now defaults to \f(CW$_\fR if no argument is provided. (Rafael)
.Sh "default argument for \fIreadline()\fP"
.IX Subsection "default argument for readline()"
\&\fIreadline()\fR now defaults to \f(CW*ARGV\fR if no argument is provided. (Rafael)
.Sh "\s-1UCD\s0 5.0.0"
.IX Subsection "UCD 5.0.0"
The copy of the Unicode Character Database included in Perl 5.9 has
been updated to version 5.0.0.
.Sh "Smart match"
.IX Subsection "Smart match"
The smart match operator (\f(CW\*(C`~~\*(C'\fR) is now available by default (you don't
need to enable it with \f(CW\*(C`use feature\*(C'\fR any longer). (Michael G Schwern)
.ie n .Sh "Implicit loading of ""feature"""
.el .Sh "Implicit loading of \f(CWfeature\fP"
.IX Subsection "Implicit loading of feature"
The \f(CW\*(C`feature\*(C'\fR pragma is now implicitly loaded when you require a minimal
perl version (with the \f(CW\*(C`use VERSION\*(C'\fR construct) greater than, or equal
to, 5.9.5.
.SH "Modules and Pragmas"
.IX Header "Modules and Pragmas"
.ie n .Sh "New Pragma, ""mro"""
.el .Sh "New Pragma, \f(CWmro\fP"
.IX Subsection "New Pragma, mro"
A new pragma, \f(CW\*(C`mro\*(C'\fR (for Method Resolution Order) has been added. It
permits to switch, on a per-class basis, the algorithm that perl uses to
find inherited methods in case of a multiple inheritance hierarchy. The
default \s-1MRO\s0 hasn't changed (\s-1DFS\s0, for Depth First Search). Another \s-1MRO\s0 is
available: the C3 algorithm. See mro for more information.
(Brandon Black)
.PP
Note that, due to changes in the implementation of class hierarchy search,
code that used to undef the \f(CW*ISA\fR glob will most probably break. Anyway,
undef'ing \f(CW*ISA\fR had the side-effect of removing the magic on the \f(CW@ISA\fR
array and should not have been done in the first place.
.Sh "bignum, bigint, bigrat"
.IX Subsection "bignum, bigint, bigrat"
The three numeric pragmas \f(CW\*(C`bignum\*(C'\fR, \f(CW\*(C`bigint\*(C'\fR and \f(CW\*(C`bigrat\*(C'\fR are now
lexically scoped. (Tels)
.Sh "Math::BigInt/Math::BigFloat"
.IX Subsection "Math::BigInt/Math::BigFloat"
Many bugs have been fixed; noteworthy are comparisons with NaN, which
no longer warn about undef values.
.PP
The following things are new:
.IP "\fIconfig()\fR" 4
.IX Item "config()"
The \fIconfig()\fR method now also supports the calling-style
\&\f(CW\*(C`config(\*(Aqlib\*(Aq)\*(C'\fR in addition to \f(CW\*(C`config()\->{\*(Aqlib\*(Aq}\*(C'\fR.
.IP "\fIimport()\fR" 4
.IX Item "import()"
Upon import, using \f(CW\*(C`lib => \*(AqFoo\*(Aq\*(C'\fR now warns if the low-level library
cannot be found. To suppress the warning, you can use \f(CW\*(C`try => \*(AqFoo\*(Aq\*(C'\fR
instead. To convert the warning into a die, use \f(CW\*(C`only => \*(AqFoo\*(Aq\*(C'\fR
instead.
.IP "roundmode common" 4
.IX Item "roundmode common"
A rounding mode of \f(CW\*(C`common\*(C'\fR is now supported.
.PP
Also, support for the following methods has been added:
.IP "\fIbpi()\fR, \fIbcos()\fR, \fIbsin()\fR, \fIbatan()\fR, \fIbatan2()\fR" 4
.IX Item "bpi(), bcos(), bsin(), batan(), batan2()"
.PD 0
.IP "\fIbmuladd()\fR" 4
.IX Item "bmuladd()"
.IP "\fIbexp()\fR, \fIbnok()\fR" 4
.IX Item "bexp(), bnok()"
.IP "\fIfrom_hex()\fR, \fIfrom_oct()\fR, and \fIfrom_bin()\fR" 4
.IX Item "from_hex(), from_oct(), and from_bin()"
.IP "\fIas_oct()\fR" 4
.IX Item "as_oct()"
.PD
.PP
In addition, the default math-backend (Calc (Perl) and FastCalc (\s-1XS\s0)) now
support storing numbers in parts with 9 digits instead of 7 on Perls with
either 64bit integer or long double support. This means math operations
scale better and are thus faster for really big numbers.
.Sh "New Core Modules"
.IX Subsection "New Core Modules"
.IP "\(bu" 4
\&\f(CW\*(C`Locale::Maketext::Simple\*(C'\fR, needed by \s-1CPANPLUS\s0, is a simple wrapper around
\&\f(CW\*(C`Locale::Maketext::Lexicon\*(C'\fR. Note that \f(CW\*(C`Locale::Maketext::Lexicon\*(C'\fR isn't
included in the perl core; the behaviour of \f(CW\*(C`Locale::Maketext::Simple\*(C'\fR
gracefully degrades when the later isn't present.
.IP "\(bu" 4
\&\f(CW\*(C`Params::Check\*(C'\fR implements a generic input parsing/checking mechanism. It
is used by \s-1CPANPLUS\s0.
.IP "\(bu" 4
\&\f(CW\*(C`Term::UI\*(C'\fR simplifies the task to ask questions at a terminal prompt.
.IP "\(bu" 4
\&\f(CW\*(C`Object::Accessor\*(C'\fR provides an interface to create per-object accessors.
.IP "\(bu" 4
\&\f(CW\*(C`Module::Pluggable\*(C'\fR is a simple framework to create modules that accept
pluggable sub-modules.
.IP "\(bu" 4
\&\f(CW\*(C`Module::Load::Conditional\*(C'\fR provides simple ways to query and possibly
load installed modules.
.IP "\(bu" 4
\&\f(CW\*(C`Time::Piece\*(C'\fR provides an object oriented interface to time functions,
overriding the built-ins \fIlocaltime()\fR and \fIgmtime()\fR.
.IP "\(bu" 4
\&\f(CW\*(C`IPC::Cmd\*(C'\fR helps to find and run external commands, possibly
interactively.
.IP "\(bu" 4
\&\f(CW\*(C`File::Fetch\*(C'\fR provide a simple generic file fetching mechanism.
.IP "\(bu" 4
\&\f(CW\*(C`Log::Message\*(C'\fR and \f(CW\*(C`Log::Message::Simple\*(C'\fR are used by the log facility
of \f(CW\*(C`CPANPLUS\*(C'\fR.
.IP "\(bu" 4
\&\f(CW\*(C`Archive::Extract\*(C'\fR is a generic archive extraction mechanism
for \fI.tar\fR (plain, gziped or bzipped) or \fI.zip\fR files.
.IP "\(bu" 4
\&\f(CW\*(C`CPANPLUS\*(C'\fR provides an \s-1API\s0 and a command-line tool to access the \s-1CPAN\s0
mirrors.
.Sh "Module changes"
.IX Subsection "Module changes"
.ie n .IP """assertions""" 4
.el .IP "\f(CWassertions\fR" 4
.IX Item "assertions"
The \f(CW\*(C`assertions\*(C'\fR pragma, its submodules \f(CW\*(C`assertions::activate\*(C'\fR and
\&\f(CW\*(C`assertions::compat\*(C'\fR and the \fB\-A\fR command-line switch have been removed.
The interface was not judged mature enough for inclusion in a stable
release.
.ie n .IP """base""" 4
.el .IP "\f(CWbase\fR" 4
.IX Item "base"
The \f(CW\*(C`base\*(C'\fR pragma now warns if a class tries to inherit from itself.
(Curtis \*(L"Ovid\*(R" Poe)
.ie n .IP """strict""\fR and \f(CW""warnings""" 4
.el .IP "\f(CWstrict\fR and \f(CWwarnings\fR" 4
.IX Item "strict and warnings"
\&\f(CW\*(C`strict\*(C'\fR and \f(CW\*(C`warnings\*(C'\fR will now complain loudly if they are loaded via
incorrect casing (as in \f(CW\*(C`use Strict;\*(C'\fR). (Johan Vromans)
.ie n .IP """warnings""" 4
.el .IP "\f(CWwarnings\fR" 4
.IX Item "warnings"
The \f(CW\*(C`warnings\*(C'\fR pragma doesn't load \f(CW\*(C`Carp\*(C'\fR anymore. That means that code
that used \f(CW\*(C`Carp\*(C'\fR routines without having loaded it at compile time might
need to be adjusted; typically, the following (faulty) code won't work
anymore, and will require parentheses to be added after the function name:
.Sp
.Vb 3
\&    use warnings;
\&    require Carp;
\&    Carp::confess "argh";
.Ve
.ie n .IP """less""" 4
.el .IP "\f(CWless\fR" 4
.IX Item "less"
\&\f(CW\*(C`less\*(C'\fR now does something useful (or at least it tries to). In fact, it
has been turned into a lexical pragma. So, in your modules, you can now
test whether your users have requested to use less \s-1CPU\s0, or less memory,
less magic, or maybe even less fat. See less for more. (Joshua ben
Jore)
.ie n .IP """Attribute::Handlers""" 4
.el .IP "\f(CWAttribute::Handlers\fR" 4
.IX Item "Attribute::Handlers"
\&\f(CW\*(C`Attribute::Handlers\*(C'\fR can now report the caller's file and line number.
(David Feldman)
.ie n .IP """B::Lint""" 4
.el .IP "\f(CWB::Lint\fR" 4
.IX Item "B::Lint"
\&\f(CW\*(C`B::Lint\*(C'\fR is now based on \f(CW\*(C`Module::Pluggable\*(C'\fR, and so can be extended
with plugins. (Joshua ben Jore)
.ie n .IP """B""" 4
.el .IP "\f(CWB\fR" 4
.IX Item "B"
It's now possible to access the lexical pragma hints (\f(CW\*(C`%^H\*(C'\fR) by using the
method \fIB::COP::hints_hash()\fR. It returns a \f(CW\*(C`B::RHE\*(C'\fR object, which in turn
can be used to get a hash reference via the method \fIB::RHE::HASH()\fR. (Joshua
ben Jore)
.ie n .IP """Thread""" 4
.el .IP "\f(CWThread\fR" 4
.IX Item "Thread"
As the old 5005thread threading model has been removed, in favor of the
ithreads scheme, the \f(CW\*(C`Thread\*(C'\fR module is now a compatibility wrapper, to
be used in old code only. It has been removed from the default list of
dynamic extensions.
.SH "Utility Changes"
.IX Header "Utility Changes"
.ie n .Sh """cpanp"""
.el .Sh "\f(CWcpanp\fP"
.IX Subsection "cpanp"
\&\f(CW\*(C`cpanp\*(C'\fR, the \s-1CPANPLUS\s0 shell, has been added. (\f(CW\*(C`cpanp\-run\-perl\*(C'\fR, an
helper for \s-1CPANPLUS\s0 operation, has been added too, but isn't intended for
direct use).
.ie n .Sh """cpan2dist"""
.el .Sh "\f(CWcpan2dist\fP"
.IX Subsection "cpan2dist"
\&\f(CW\*(C`cpan2dist\*(C'\fR is a new utility, that comes with \s-1CPANPLUS\s0. It's a tool to
create distributions (or packages) from \s-1CPAN\s0 modules.
.ie n .Sh """pod2html"""
.el .Sh "\f(CWpod2html\fP"
.IX Subsection "pod2html"
The output of \f(CW\*(C`pod2html\*(C'\fR has been enhanced to be more customizable via
\&\s-1CSS\s0. Some formatting problems were also corrected. (Jari Aalto)
.SH "Documentation"
.IX Header "Documentation"
.Sh "New manpage, perlunifaq"
.IX Subsection "New manpage, perlunifaq"
A new manual page, perlunifaq (the Perl Unicode \s-1FAQ\s0), has been added
(Juerd Waalboer).
.SH "Performance Enhancements"
.IX Header "Performance Enhancements"
.SH "Installation and Configuration Improvements"
.IX Header "Installation and Configuration Improvements"
.Sh "\*(C+ compatibility"
.IX Subsection " compatibility"
Efforts have been made to make perl and the core \s-1XS\s0 modules compilable
with various \*(C+ compilers (although the situation is not perfect with
some of the compilers on some of the platforms tested.)
.Sh "Visual \*(C+"
.IX Subsection "Visual "
Perl now can be compiled with Microsoft Visual \*(C+ 2005.
.Sh "Static build on Win32"
.IX Subsection "Static build on Win32"
It's now possible to build a \f(CW\*(C`perl\-static.exe\*(C'\fR that doesn't depend
on \f(CW\*(C`perl59.dll\*(C'\fR on Win32. See the Win32 makefiles for details.
(Vadim Konovalov)
.Sh "win32 builds"
.IX Subsection "win32 builds"
All win32 builds (MS-Win, WinCE) have been merged and cleaned up.
.ie n .Sh """d_pseudofork""\fP and \f(CW""d_printf_format_null"""
.el .Sh "\f(CWd_pseudofork\fP and \f(CWd_printf_format_null\fP"
.IX Subsection "d_pseudofork and d_printf_format_null"
A new configuration variable, available as \f(CW$Config{d_pseudofork}\fR in
the Config module, has been added, to distinguish real \fIfork()\fR support
from fake pseudofork used on Windows platforms.
.PP
A new configuration variable, \f(CW\*(C`d_printf_format_null\*(C'\fR, has been added, 
to see if printf-like formats are allowed to be \s-1NULL\s0.
.Sh "Help"
.IX Subsection "Help"
\&\f(CW\*(C`Configure \-h\*(C'\fR has been extended with the most used option.
.PP
Much less 'Whoa there' messages.
.Sh "64bit systems"
.IX Subsection "64bit systems"
Better detection of 64bit(only) systems, and setting all the (library)
paths accordingly.
.Sh "Ports"
.IX Subsection "Ports"
Perl has been reported to work on MidnightBSD.
.PP
Support for Cray \s-1XT4\s0 Catamount/Qk has been added.
.PP
Vendor patches have been merged for RedHat and GenToo.
.SH "Selected Bug Fixes"
.IX Header "Selected Bug Fixes"
PerlIO::scalar will now prevent writing to read-only scalars. Moreover,
\&\fIseek()\fR is now supported with PerlIO::scalar\-based filehandles, the
underlying string being zero-filled as needed. (Rafael, Jarkko Hietaniemi)
.PP
\&\fIstudy()\fR never worked for \s-1UTF\-8\s0 strings, but could lead to false results.
It's now a no-op on \s-1UTF\-8\s0 data. (Yves Orton)
.PP
The signals \s-1SIGILL\s0, \s-1SIGBUS\s0 and \s-1SIGSEGV\s0 are now always delivered in an
\&\*(L"unsafe\*(R" manner (contrary to other signals, that are deferred until the
perl interpreter reaches a reasonably stable state; see
\&\*(L"Deferred Signals (Safe Signals)\*(R" in perlipc). (Rafael)
.PP
When a module or a file is loaded through an \f(CW@INC\fR\-hook, and when this hook
has set a filename entry in \f(CW%INC\fR, _\|_FILE_\|_ is now set for this module
accordingly to the contents of that \f(CW%INC\fR entry. (Rafael)
.PP
The \f(CW\*(C`\-w\*(C'\fR and \f(CW\*(C`\-t\*(C'\fR switches can now be used together without messing
up what categories of warnings are activated or not. (Rafael)
.PP
Duping a filehandle which has the \f(CW\*(C`:utf8\*(C'\fR PerlIO layer set will now
properly carry that layer on the duped filehandle. (Rafael)
.PP
Localizing an hash element whose key was given as a variable didn't work
correctly if the variable was changed while the \fIlocal()\fR was in effect (as
in \f(CW\*(C`local $h{$x}; ++$x\*(C'\fR). (Bo Lindbergh)
.SH "New or Changed Diagnostics"
.IX Header "New or Changed Diagnostics"
.Sh "Deprecations"
.IX Subsection "Deprecations"
Two deprecation warnings have been added: (Rafael)
.PP
.Vb 2
\&    Opening dirhandle %s also as a file
\&    Opening filehandle %s also as a directory
.Ve
.SH "Changed Internals"
.IX Header "Changed Internals"
The anonymous hash and array constructors now take 1 op in the optree
instead of 3, now that pp_anonhash and pp_anonlist return a reference to
an hash/array when the op is flagged with OPf_SPECIAL (Nicholas Clark).
.SH "Known Problems"
.IX Header "Known Problems"
.Sh "Platform Specific Problems"
.IX Subsection "Platform Specific Problems"
.SH "Reporting Bugs"
.IX Header "Reporting Bugs"
If you find what you think is a bug, you might check the articles
recently posted to the comp.lang.perl.misc newsgroup and the perl
bug database at http://rt.perl.org/rt3/ .  There may also be
information at http://www.perl.org/ , the Perl Home Page.
.PP
If you believe you have an unreported bug, please run the \fBperlbug\fR
program included with your release.  Be sure to trim your bug down
to a tiny but sufficient test case.  Your bug report, along with the
output of \f(CW\*(C`perl \-V\*(C'\fR, will be sent off to [e-mail] to be
analysed by the Perl porting team.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
The \fIChanges\fR file for exhaustive details on what changed.
.PP
The \fI\s-1INSTALL\s0\fR file for how to build Perl.
.PP
The \fI\s-1README\s0\fR file for general stuff.
.PP
The \fIArtistic\fR and \fICopying\fR files for copyright information.