mm_vms.pm

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.

    $target = "Perl$Config{'exe_ext'}" unless $target;
    my $shrtarget;
    ($shrtarget,$targdir) = fileparse($target);
    $shrtarget =~ s/^([^.]*)/$1Shr/;
    $shrtarget = $targdir . $shrtarget;
    $target = "Perlshr.$Config{'dlext'}" unless $target;
    $tmpdir = "[]" unless $tmpdir;
    $tmpdir = $self->fixpath($tmpdir,1);
    if (@optlibs) { $extralist = join(' ',@optlibs); }
    else          { $extralist = ''; }
    # Let ExtUtils::Liblist find the necessary libs for us (but skip PerlShr)
    # that's what we're building here).
    push @optlibs, grep { !/PerlShr/i } split ' ', +($self->ext())[2];
    if ($libperl) {
	unless (-f $libperl || -f ($libperl = $self->catfile($Config{'installarchlib'},'CORE',$libperl))) {
	    print STDOUT "Warning: $libperl not found\n";
	    undef $libperl;
	}
    }
    unless ($libperl) {
	if (defined $self->{PERL_SRC}) {
	    $libperl = $self->catfile($self->{PERL_SRC},"libperl$self->{LIB_EXT}");
	} elsif (-f ($libperl = $self->catfile($Config{'installarchlib'},'CORE',"libperl$self->{LIB_EXT}")) ) {
	} else {
	    print STDOUT "Warning: $libperl not found
    If you're going to build a static perl binary, make sure perl is installed
    otherwise ignore this warning\n";
	}
    }
    $libperldir = $self->fixpath((fileparse($libperl))[1],1);

    push @m, '
# Fill in the target you want to produce if it\'s not perl
MAP_TARGET    = ',$self->fixpath($target,0),'
MAP_SHRTARGET = ',$self->fixpath($shrtarget,0),"
MAP_LINKCMD   = $linkcmd
MAP_PERLINC   = ", $perlinc ? map('"$_" ',@{$perlinc}) : '',"
MAP_EXTRA     = $extralist
MAP_LIBPERL = ",$self->fixpath($libperl,0),'
';


    push @m,"\n${tmpdir}Makeaperl.Opt : \$(MAP_EXTRA)\n";
    foreach (@optlibs) {
	push @m,'	$(NOECHO) $(PERL) -e "print q{',$_,'}" >>$(MMS$TARGET)',"\n";
    }
    push @m,"\n${tmpdir}PerlShr.Opt :\n\t";
    push @m,'$(NOECHO) $(PERL) -e "print q{$(MAP_SHRTARGET)}" >$(MMS$TARGET)',"\n";

    push @m,'
$(MAP_SHRTARGET) : $(MAP_LIBPERL) Makeaperl.Opt ',"${libperldir}Perlshr_Attr.Opt",'
	$(MAP_LINKCMD)/Shareable=$(MMS$TARGET) $(MAP_LIBPERL), Makeaperl.Opt/Option ',"${libperldir}Perlshr_Attr.Opt/Option",'
$(MAP_TARGET) : $(MAP_SHRTARGET) ',"${tmpdir}perlmain\$(OBJ_EXT) ${tmpdir}PerlShr.Opt",'
	$(MAP_LINKCMD) ',"${tmpdir}perlmain\$(OBJ_EXT)",', PerlShr.Opt/Option
	$(NOECHO) $(ECHO) "To install the new ""$(MAP_TARGET)"" binary, say"
	$(NOECHO) $(ECHO) "    $(MAKE)$(USEMAKEFILE)$(FIRST_MAKEFILE) inst_perl $(USEMACROS)MAP_TARGET=$(MAP_TARGET)$(ENDMACRO)"
	$(NOECHO) $(ECHO) "To remove the intermediate files, say
	$(NOECHO) $(ECHO) "    $(MAKE)$(USEMAKEFILE)$(FIRST_MAKEFILE) map_clean"
';
    push @m,"\n${tmpdir}perlmain.c : \$(FIRST_MAKEFILE)\n\t\$(NOECHO) \$(PERL) -e 1 >${tmpdir}Writemain.tmp\n";
    push @m, "# More from the 255-char line length limit\n";
    foreach (@staticpkgs) {
	push @m,'	$(NOECHO) $(PERL) -e "print q{',$_,qq[}" >>${tmpdir}Writemain.tmp\n];
    }

    push @m, sprintf <<'MAKE_FRAG', $tmpdir, $tmpdir;
	$(NOECHO) $(PERL) $(MAP_PERLINC) -ane "use ExtUtils::Miniperl; writemain(@F)" %sWritemain.tmp >$(MMS$TARGET)
	$(NOECHO) $(RM_F) %sWritemain.tmp
MAKE_FRAG

    push @m, q[
# Still more from the 255-char line length limit
doc_inst_perl :
	$(NOECHO) $(MKPATH) $(DESTINSTALLARCHLIB)
	$(NOECHO) $(ECHO) "Perl binary $(MAP_TARGET)|" >.MM_tmp
	$(NOECHO) $(ECHO) "MAP_STATIC|$(MAP_STATIC)|" >>.MM_tmp
	$(NOECHO) $(PERL) -pl040 -e " " ].$self->catfile('$(INST_ARCHAUTODIR)','extralibs.all'),q[ >>.MM_tmp
	$(NOECHO) $(ECHO) -e "MAP_LIBPERL|$(MAP_LIBPERL)|" >>.MM_tmp
	$(NOECHO) $(DOC_INSTALL) <.MM_tmp >>].$self->catfile('$(DESTINSTALLARCHLIB)','perllocal.pod').q[
	$(NOECHO) $(RM_F) .MM_tmp
];

    push @m, "
inst_perl : pure_inst_perl doc_inst_perl
	\$(NOECHO) \$(NOOP)

pure_inst_perl : \$(MAP_TARGET)
	$self->{CP} \$(MAP_SHRTARGET) ",$self->fixpath($Config{'installbin'},1),"
	$self->{CP} \$(MAP_TARGET) ",$self->fixpath($Config{'installbin'},1),"

clean :: map_clean
	\$(NOECHO) \$(NOOP)

map_clean :
	\$(RM_F) ${tmpdir}perlmain\$(OBJ_EXT) ${tmpdir}perlmain.c \$(FIRST_MAKEFILE)
	\$(RM_F) ${tmpdir}Makeaperl.Opt ${tmpdir}PerlShr.Opt \$(MAP_TARGET)
";

    join '', @m;
}

# --- Output postprocessing section ---

=item maketext_filter (override)

Insure that colons marking targets are preceded by space, in order
to distinguish the target delimiter from a colon appearing as
part of a filespec.

=cut

sub maketext_filter {
    my($self, $text) = @_;

    $text =~ s/^([^\s:=]+)(:+\s)/$1 $2/mg;
    return $text;
}

=item prefixify (override)

prefixifying on VMS is simple.  Each should simply be:

    perl_root:[some.dir]

which can just be converted to:

    volume:[your.prefix.some.dir]

otherwise you get the default layout.

In effect, your search prefix is ignored and $Config{vms_prefix} is
used instead.

=cut

sub prefixify {
    my($self, $var, $sprefix, $rprefix, $default) = @_;

    # Translate $(PERLPREFIX) to a real path.
    $rprefix = $self->eliminate_macros($rprefix);
    $rprefix = VMS::Filespec::vmspath($rprefix) if $rprefix;
    $sprefix = VMS::Filespec::vmspath($sprefix) if $sprefix;

    $default = VMS::Filespec::vmsify($default) 
      unless $default =~ /\[.*\]/;

    (my $var_no_install = $var) =~ s/^install//;
    my $path = $self->{uc $var} || 
               $ExtUtils::MM_Unix::Config_Override{lc $var} || 
               $Config{lc $var} || $Config{lc $var_no_install};

    if( !$path ) {
        print STDERR "  no Config found for $var.\n" if $Verbose >= 2;
        $path = $self->_prefixify_default($rprefix, $default);
    }
    elsif( !$self->{ARGS}{PREFIX} || !$self->file_name_is_absolute($path) ) {
        # do nothing if there's no prefix or if its relative
    }
    elsif( $sprefix eq $rprefix ) {
        print STDERR "  no new prefix.\n" if $Verbose >= 2;
    }
    else {

        print STDERR "  prefixify $var => $path\n"     if $Verbose >= 2;
        print STDERR "    from $sprefix to $rprefix\n" if $Verbose >= 2;

        my($path_vol, $path_dirs) = $self->splitpath( $path );
        if( $path_vol eq $Config{vms_prefix}.':' ) {
            print STDERR "  $Config{vms_prefix}: seen\n" if $Verbose >= 2;

            $path_dirs =~ s{^\[}{\[.} unless $path_dirs =~ m{^\[\.};
            $path = $self->_catprefix($rprefix, $path_dirs);
        }
        else {
            $path = $self->_prefixify_default($rprefix, $default);
        }
    }

    print "    now $path\n" if $Verbose >= 2;
    return $self->{uc $var} = $path;
}


sub _prefixify_default {
    my($self, $rprefix, $default) = @_;

    print STDERR "  cannot prefix, using default.\n" if $Verbose >= 2;

    if( !$default ) {
        print STDERR "No default!\n" if $Verbose >= 1;
        return;
    }
    if( !$rprefix ) {
        print STDERR "No replacement prefix!\n" if $Verbose >= 1;
        return '';
    }

    return $self->_catprefix($rprefix, $default);
}

sub _catprefix {
    my($self, $rprefix, $default) = @_;

    my($rvol, $rdirs) = $self->splitpath($rprefix);
    if( $rvol ) {
        return $self->catpath($rvol,
                                   $self->catdir($rdirs, $default),
                                   ''
                                  )
    }
    else {
        return $self->catdir($rdirs, $default);
    }
}


=item cd

=cut

sub cd {
    my($self, $dir, @cmds) = @_;

    $dir = vmspath($dir);

    my $cmd = join "\n\t", map "$_", @cmds;

    # No leading tab makes it look right when embedded
    my $make_frag = sprintf <<'MAKE_FRAG', $dir, $cmd;
startdir = F$Environment("Default")
	Set Default %s
	%s
	Set Default 'startdir'
MAKE_FRAG

    # No trailing newline makes this easier to embed
    chomp $make_frag;

    return $make_frag;
}


=item oneliner

=cut

sub oneliner {
    my($self, $cmd, $switches) = @_;
    $switches = [] unless defined $switches;

    # Strip leading and trailing newlines
    $cmd =~ s{^\n+}{};
    $cmd =~ s{\n+$}{};

    $cmd = $self->quote_literal($cmd);
    $cmd = $self->escape_newlines($cmd);

    # Switches must be quoted else they will be lowercased.
    $switches = join ' ', map { qq{"$_"} } @$switches;

    return qq{\$(ABSPERLRUN) $switches -e $cmd "--"};
}


=item B<echo>

perl trips up on "<foo>" thinking it's an input redirect.  So we use the
native Write command instead.  Besides, its faster.

=cut

sub echo {
    my($self, $text, $file, $appending) = @_;
    $appending ||= 0;

    my $opencmd = $appending ? 'Open/Append' : 'Open/Write';

    my @cmds = ("\$(NOECHO) $opencmd MMECHOFILE $file ");
    push @cmds, map { '$(NOECHO) Write MMECHOFILE '.$self->quote_literal($_) } 
                split /\n/, $text;
    push @cmds, '$(NOECHO) Close MMECHOFILE';
    return @cmds;
}


=item quote_literal

=cut

sub quote_literal {
    my($self, $text) = @_;

    # I believe this is all we should need.
    $text =~ s{"}{""}g;

    return qq{"$text"};
}

=item escape_newlines

=cut

sub escape_newlines {
    my($self, $text) = @_;

    $text =~ s{\n}{-\n}g;

    return $text;
}

=item max_exec_len

256 characters.

=cut

sub max_exec_len {
    my $self = shift;

    return $self->{_MAX_EXEC_LEN} ||= 256;
}

=item init_linker

=cut

sub init_linker {
    my $self = shift;
    $self->{EXPORT_LIST} ||= '$(BASEEXT).opt';

    my $shr = $Config{dbgprefix} . 'PERLSHR';
    if ($self->{PERL_SRC}) {
        $self->{PERL_ARCHIVE} ||=
          $self->catfile($self->{PERL_SRC}, "$shr.$Config{'dlext'}");
    }
    else {
        $self->{PERL_ARCHIVE} ||=
          $ENV{$shr} ? $ENV{$shr} : "Sys\$Share:$shr.$Config{'dlext'}";
    }

    $self->{PERL_ARCHIVE_AFTER} ||= '';
}

=item eliminate_macros

Expands MM[KS]/Make macros in a text string, using the contents of
identically named elements of C<%$self>, and returns the result
as a file specification in Unix syntax.

NOTE:  This is the canonical version of the method.  The version in
File::Spec::VMS is deprecated.

=cut

sub eliminate_macros {
    my($self,$path) = @_;
    return '' unless $path;
    $self = {} unless ref $self;

    if ($path =~ /\s/) {
      return join ' ', map { $self->eliminate_macros($_) } split /\s+/, $path;
    }

    my($npath) = unixify($path);
    # sometimes unixify will return a string with an off-by-one trailing null
    $npath =~ s{\0$}{};

    my($complex) = 0;
    my($head,$macro,$tail);

    # perform m##g in scalar context so it acts as an iterator
    while ($npath =~ m#(.*?)\$\((\S+?)\)(.*)#gs) { 
        if (defined $self->{$2}) {
            ($head,$macro,$tail) = ($1,$2,$3);
            if (ref $self->{$macro}) {
                if (ref $self->{$macro} eq 'ARRAY') {
                    $macro = join ' ', @{$self->{$macro}};
                }
                else {
                    print "Note: can't expand macro \$($macro) containing ",ref($self->{$macro}),
                          "\n\t(using MMK-specific deferred substitutuon; MMS will break)\n";
                    $macro = "\cB$macro\cB";
                    $complex = 1;
                }
            }
            else { ($macro = unixify($self->{$macro})) =~ s#/\Z(?!\n)##; }
            $npath = "$head$macro$tail";
        }
    }
    if ($complex) { $npath =~ s#\cB(.*?)\cB#\${$1}#gs; }
    $npath;
}

=item fixpath

   my $path = $mm->fixpath($path);
   my $path = $mm->fixpath($path, $is_dir);

Catchall routine to clean up problem MM[SK]/Make macros.  Expands macros
in any directory specification, in order to avoid juxtaposing two
VMS-syntax directories when MM[SK] is run.  Also expands expressions which
are all macro, so that we can tell how long the expansion is, and avoid
overrunning DCL's command buffer when MM[KS] is running.

fixpath() checks to see whether the result matches the name of a
directory in the current default directory and returns a directory or
file specification accordingly.  C<$is_dir> can be set to true to
force fixpath() to consider the path to be a directory or false to force
it to be a file.

NOTE:  This is the canonical version of the method.  The version in
File::Spec::VMS is deprecated.

=cut

sub fixpath {
    my($self,$path,$force_path) = @_;
    return '' unless $path;
    $self = bless {} unless ref $self;
    my($fixedpath,$prefix,$name);

    if ($path =~ /[ \t]/) {
      return join ' ',
             map { $self->fixpath($_,$force_path) }
	     split /[ \t]+/, $path;
    }

    if ($path =~ m#^\$\([^\)]+\)\Z(?!\n)#s || $path =~ m#[/:>\]]#) { 
        if ($force_path or $path =~ /(?:DIR\)|\])\Z(?!\n)/) {
            $fixedpath = vmspath($self->eliminate_macros($path));
        }
        else {
            $fixedpath = vmsify($self->eliminate_macros($path));
        }
    }
    elsif ((($prefix,$name) = ($path =~ m#^\$\(([^\)]+)\)(.+)#s)) && $self->{$prefix}) {
        my($vmspre) = $self->eliminate_macros("\$($prefix)");
        # is it a dir or just a name?
        $vmspre = ($vmspre =~ m|/| or $prefix =~ /DIR\Z(?!\n)/) ? vmspath($vmspre) : '';
        $fixedpath = ($vmspre ? $vmspre : $self->{$prefix}) . $name;
        $fixedpath = vmspath($fixedpath) if $force_path;
    }
    else {
        $fixedpath = $path;
        $fixedpath = vmspath($fixedpath) if $force_path;
    }
    # No hints, so we try to guess
    if (!defined($force_path) and $fixedpath !~ /[:>(.\]]/) {
        $fixedpath = vmspath($fixedpath) if -d $fixedpath;
    }

    # Trim off root dirname if it's had other dirs inserted in front of it.
    $fixedpath =~ s/\.000000([\]>])/$1/;
    # Special case for VMS absolute directory specs: these will have had device
    # prepended during trip through Unix syntax in eliminate_macros(), since
    # Unix syntax has no way to express "absolute from the top of this device's
    # directory tree".
    if ($path =~ /^[\[>][^.\-]/) { $fixedpath =~ s/^[^\[<]+//; }

    return $fixedpath;
}


=item os_flavor

VMS is VMS.

=cut

sub os_flavor {
    return('VMS');
}

=back


=head1 AUTHOR

Original author Charles Bailey F<[e-mail]>

Maintained by Michael G Schwern F<[e-mail]>

See L<ExtUtils::MakeMaker> for patching and contact information.


=cut

1;