use Config;
use File::Basename qw(&basename &dirname);
+use Cwd;
# List explicitly here the variables you want Configure to
# generate. Metaconfig only looks for shell variables, so you
# This forces PL files to create target in same directory as PL file.
# This is so that make depend always knows where to find PL derivatives.
-chdir(dirname($0));
-($file = basename($0)) =~ s/\.PL$//;
-$file =~ s/\.pl$//
- if ($^O eq 'VMS' or $^O eq 'os2'); # "case-forgiving"
+$origdir = cwd;
+chdir dirname($0);
+$file = basename($0, '.PL');
+$file .= '.com' if $^O eq 'VMS';
open OUT,">$file" or die "Can't create $file: $!";
# You can use $Config{...} to use Configure variables.
print OUT <<"!GROK!THIS!";
-$Config{'startperl'}
- eval 'exec perl -S \$0 "\$@"'
- if 0;
+$Config{startperl}
+ eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
+ if \$running_under_some_shell;
\$startperl = "$Config{startperl}";
+\$perlpath = "$Config{perlpath}";
!GROK!THIS!
# In the following, perl variables are not expanded during extraction.
print OUT <<'!NO!SUBS!';
-# $RCSfile: s2p.PL,v $$Revision: 1.1.1.1 $$Date: 1997/01/11 12:49:38 $
-#
-# $Log: s2p.PL,v $
-# Revision 1.1.1.1 1997/01/11 12:49:38 mbeattie
-# 5.003
+# $RCSfile: s2p.SH,v $$Revision: 4.1 $$Date: 92/08/07 18:29:23 $
#
+# $Log: s2p.SH,v $
+
+=head1 NAME
+
+s2p - Sed to Perl translator
+
+=head1 SYNOPSIS
+
+B<s2p [options] filename>
+
+=head1 DESCRIPTION
+
+I<S2p> takes a sed script specified on the command line (or from
+standard input) and produces a comparable I<perl> script on the
+standard output.
+
+=head2 Options
+
+Options include:
+
+=over 5
+
+=item B<-DE<lt>numberE<gt>>
+
+sets debugging flags.
+
+=item B<-n>
+
+specifies that this sed script was always invoked with a B<sed -n>.
+Otherwise a switch parser is prepended to the front of the script.
+
+=item B<-p>
+
+specifies that this sed script was never invoked with a B<sed -n>.
+Otherwise a switch parser is prepended to the front of the script.
+
+=back
+
+=head2 Considerations
+
+The perl script produced looks very sed-ish, and there may very well
+be better ways to express what you want to do in perl. For instance,
+s2p does not make any use of the split operator, but you might want
+to.
+
+The perl script you end up with may be either faster or slower than
+the original sed script. If you're only interested in speed you'll
+just have to try it both ways. Of course, if you want to do something
+sed doesn't do, you have no choice. It's often possible to speed up
+the perl script by various methods, such as deleting all references to
+$\ and chop.
+
+=head1 ENVIRONMENT
+
+S2p uses no environment variables.
+
+=head1 AUTHOR
+
+Larry Wall E<lt>F<larry@wall.org>E<gt>
+
+=head1 FILES
+
+=head1 SEE ALSO
+
+ perl The perl compiler/interpreter
+
+ a2p awk to perl translator
+
+=head1 DIAGNOSTICS
+
+=head1 BUGS
+
+=cut
$indent = 4;
$shiftwidth = 4;
}
unless ($debug) {
- open(BODY,">/tmp/sperl$$") ||
+ open(BODY,"+>/tmp/sperl$$") ||
&Die("Can't open temp file: $!\n");
}
EOT
}
-close BODY;
-
unless ($debug) {
- open(HEAD,">/tmp/sperl2$$.c")
- || &Die("Can't open temp file 2: $!\n");
- print HEAD "#define PRINTIT\n" if $printit;
- print HEAD "#define APPENDSEEN\n" if $appendseen;
- print HEAD "#define TSEEN\n" if $tseen;
- print HEAD "#define DSEEN\n" if $dseen;
- print HEAD "#define ASSUMEN\n" if $assumen;
- print HEAD "#define ASSUMEP\n" if $assumep;
- print HEAD "#define TOPLABEL\n" if $toplabel;
- print HEAD "#define SAWNEXT\n" if $sawnext;
- if ($opens) {print HEAD "$opens\n";}
- open(BODY,"/tmp/sperl$$")
- || &Die("Can't reopen temp file: $!\n");
- while (<BODY>) {
- print HEAD $_;
- }
- close HEAD;
print &q(<<"EOT");
: $startperl
-: eval 'exec perl -S \$0 \${1+"\$@"}'
+: eval 'exec $perlpath -S \$0 \${1+"\$@"}'
: if \$running_under_some_shell;
:
EOT
- open(BODY,"cc -E /tmp/sperl2$$.c |") ||
- &Die("Can't reopen temp file: $!\n");
+ print"$opens\n" if $opens;
+ seek(BODY, 0, 0) || die "Can't rewind temp file: $!\n";
while (<BODY>) {
- /^# [0-9]/ && next;
/^[ \t]*$/ && next;
+ /^#ifdef (\w+)/ && ((${lc $1} || &skip), next);
+ /^#else/ && (&skip, next);
+ /^#endif/ && next;
s/^<><>//;
print;
}
exit;
sub Cleanup {
- chdir "/tmp";
- unlink "sperl$$", "sperl2$$", "sperl2$$.c";
+ unlink "/tmp/sperl$$";
}
sub Die {
&Cleanup;
$repl = substr($_, $repl+1, $end-$repl-1);
$end = substr($_, $end + 1, 1000);
&simplify($pat);
- $dol = '$';
$subst = "$pat$repl$delim";
$cmd = '';
while ($end) {
$_[0] =~ s/([\w\s!@#%^&-=,:;'"])\1\*/$1+/g;
}
+sub skip {
+ local($level) = 0;
+
+ while(<BODY>) {
+ /^#ifdef/ && $level++;
+ /^#else/ && !$level && return;
+ /^#endif/ && !$level-- && return;
+ }
+
+ die "Unterminated `#ifdef' conditional\n";
+}
!NO!SUBS!
close OUT or die "Can't close $file: $!";
chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';
+chdir $origdir;
https://perl5.git.perl.org / perl5.git / blobdiff