[p5sagit/p5-mst-13.2.git] / x2p / s2p.SH

: This forces SH files to create target in same directory as SH file.
: This is so that make depend always knows where to find SH derivatives.
case "$0" in
*/*) cd `expr X$0 : 'X\(.*\)/'` ;;
esac
case $CONFIG in
'')
    if test ! -f config.sh; then
	ln ../config.sh . || \
	ln ../../config.sh . || \
	ln ../../../config.sh . || \
	(echo "Can't find config.sh."; exit 1)
    fi
    . config.sh
    ;;
esac
echo "Extracting s2p (with variable substitutions)"
: This section of the file will have variable substitutions done on it.
: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
: Protect any dollar signs and backticks that you do not want interpreted
: by putting a backslash in front.  You may delete these comments.
$spitshell >s2p <<!GROK!THIS!
#!$bin/perl

\$bin = '$bin';
!GROK!THIS!

: In the following dollars and backticks do not need the extra backslash.
$spitshell >>s2p <<'!NO!SUBS!'

# $Header: s2p.SH,v 3.0.1.5 90/10/16 11:32:40 lwall Locked $
#
# $Log:	s2p.SH,v $
# Revision 3.0.1.5  90/10/16  11:32:40  lwall
# patch29: s2p modernized
# 
# Revision 3.0.1.4  90/08/09  05:50:43  lwall
# patch19: s2p didn't translate \n right
# 
# Revision 3.0.1.3  90/03/01  10:31:21  lwall
# patch9: s2p didn't handle \< and \>
# 
# Revision 3.0.1.2  89/11/17  15:51:27  lwall
# patch5: in s2p, line labels without a subsequent statement were done wrong
# patch5: s2p left residue in /tmp
# 
# Revision 3.0.1.1  89/11/11  05:08:25  lwall
# patch2: in s2p, + within patterns needed backslashing
# patch2: s2p was printing out some debugging info to the output file
# 
# Revision 3.0  89/10/18  15:35:02  lwall
# 3.0 baseline
# 
# Revision 2.0.1.1  88/07/11  23:26:23  root
# patch2: s2p didn't put a proper prologue on output script
# 
# Revision 2.0  88/06/05  00:15:55  root
# Baseline version 2.0.
# 
#

$indent = 4;
$shiftwidth = 4;
$l = '{'; $r = '}';

while ($ARGV[0] =~ /^-/) {
    $_ = shift;
  last if /^--/;
    if (/^-D/) {
	$debug++;
	open(BODY,'>-');
	next;
    }
    if (/^-n/) {
	$assumen++;
	next;
    }
    if (/^-p/) {
	$assumep++;
	next;
    }
    die "I don't recognize this switch: $_\n";
}

unless ($debug) {
    open(BODY,">/tmp/sperl$$") ||
      &Die("Can't open temp file: $!\n");
}

if (!$assumen && !$assumep) {
    print BODY <<'EOT';
while ($ARGV[0] =~ /^-/) {
    $_ = shift;
  last if /^--/;
    if (/^-n/) {
	$nflag++;
	next;
    }
    die "I don't recognize this switch: $_\\n";
}

EOT
}

print BODY <<'EOT';

#ifdef PRINTIT
#ifdef ASSUMEP
$printit++;
#else
$printit++ unless $nflag;
#endif
#endif
LINE: while (<>) {
EOT

LINE: while (<>) {

    # Wipe out surrounding whitespace.

    s/[ \t]*(.*)\n$/$1/;

    # Perhaps it's a label/comment.

    if (/^:/) {
	s/^:[ \t]*//;
	$label = &make_label($_);
	if ($. == 1) {
	    $toplabel = $label;
	}
	$_ = "$label:";
	if ($lastlinewaslabel++) {
	    $indent += 4;
	    print BODY &tab, ";\n";
	    $indent -= 4;
	}
	if ($indent >= 2) {
	    $indent -= 2;
	    $indmod = 2;
	}
	next;
    } else {
	$lastlinewaslabel = '';
    }

    # Look for one or two address clauses

    $addr1 = '';
    $addr2 = '';
    if (s/^([0-9]+)//) {
	$addr1 = "$1";
    }
    elsif (s/^\$//) {
	$addr1 = 'eof()';
    }
    elsif (s|^/||) {
	$addr1 = &fetchpat('/');
    }
    if (s/^,//) {
	if (s/^([0-9]+)//) {
	    $addr2 = "$1";
	} elsif (s/^\$//) {
	    $addr2 = "eof()";
	} elsif (s|^/||) {
	    $addr2 = &fetchpat('/');
	} else {
	    &Die("Invalid second address at line $.\n");
	}
	$addr1 .= " .. $addr2";
    }

    # Now we check for metacommands {, }, and ! and worry
    # about indentation.

    s/^[ \t]+//;
    # a { to keep vi happy
    if ($_ eq '}') {
	$indent -= 4;
	next;
    }
    if (s/^!//) {
	$if = 'unless';
	$else = "$r else $l\n";
    } else {
	$if = 'if';
	$else = '';
    }
    if (s/^{//) {	# a } to keep vi happy
	$indmod = 4;
	$redo = $_;
	$_ = '';
	$rmaybe = '';
    } else {
	$rmaybe = "\n$r";
	if ($addr2 || $addr1) {
	    $space = ' ' x $shiftwidth;
	} else {
	    $space = '';
	}
	$_ = &transmogrify();
    }

    # See if we can optimize to modifier form.

    if ($addr1) {
	if ($_ !~ /[\n{}]/ && $rmaybe && !$change &&
	  $_ !~ / if / && $_ !~ / unless /) {
	    s/;$/ $if $addr1;/;
	    $_ = substr($_,$shiftwidth,1000);
	} else {
	    $_ = "$if ($addr1) $l\n$change$_$rmaybe";
	}
	$change = '';
	next LINE;
    }
} continue {
    @lines = split(/\n/,$_);
    for (@lines) {
	unless (s/^ *<<--//) {
	    print BODY &tab;
	}
	print BODY $_, "\n";
    }
    $indent += $indmod;
    $indmod = 0;
    if ($redo) {
	$_ = $redo;
	$redo = '';
	redo LINE;
    }
}
if ($lastlinewaslabel++) {
    $indent += 4;
    print BODY &tab, ";\n";
    $indent -= 4;
}

print BODY "}\n";
if ($appendseen || $tseen || !$assumen) {
    $printit++ if $dseen || (!$assumen && !$assumep);
    print BODY <<'EOT';

continue {
#ifdef PRINTIT
#ifdef DSEEN
#ifdef ASSUMEP
    print if $printit++;
#else
    if ($printit)
	{ print; }
    else
	{ $printit++ unless $nflag; }
#endif
#else
    print if $printit;
#endif
#else
    print;
#endif
#ifdef TSEEN
    $tflag = '';
#endif
#ifdef APPENDSEEN
    if ($atext) { print $atext; $atext = ''; }
#endif
}
EOT
}

close BODY;

unless ($debug) {
    open(HEAD,">/tmp/sperl2$$.c")
      || &Die("Can't open temp file 2: $!\n");
    print HEAD "#define PRINTIT\n" if ($printit);
    print HEAD "#define APPENDSEEN\n" if ($appendseen);
    print HEAD "#define TSEEN\n" if ($tseen);
    print HEAD "#define DSEEN\n" if ($dseen);
    print HEAD "#define ASSUMEN\n" if ($assumen);
    print HEAD "#define ASSUMEP\n" if ($assumep);
    if ($opens) {print HEAD "$opens\n";}
    open(BODY,"/tmp/sperl$$")
      || &Die("Can't reopen temp file: $!\n");
    while (<BODY>) {
	print HEAD $_;
    }
    close HEAD;

    print <<"EOT";
#!$bin/perl
eval 'exec $bin/perl -S \$0 \$*'
	if \$running_under_some_shell;

EOT
    open(BODY,"cc -E /tmp/sperl2$$.c |") ||
	&Die("Can't reopen temp file: $!\n");
    while (<BODY>) {
	/^# [0-9]/ && next;
	/^[ \t]*$/ && next;
	s/^<><>//;
	print;
    }
}

&Cleanup;
exit;

sub Cleanup {
    chdir "/tmp";
    unlink "sperl$$", "sperl2$$", "sperl2$$.c";
}
sub Die {
    &Cleanup;
    die $_[0];
}
sub tab {
    "\t" x ($indent / 8) . ' ' x ($indent % 8);
}
sub make_filehandle {
    local($_) = $_[0];
    local($fname) = $_;
    s/[^a-zA-Z]/_/g;
    s/^_*//;
    substr($_,0,1) =~ y/a-z/A-Z/ if /^[a-z]/;
    if (!$seen{$_}) {
	$opens .= <<"EOT";
open($_,'>$fname') || die "Can't create $fname";
EOT
    }
    $seen{$_} = $_;
}

sub make_label {
    local($label) = @_;
    $label =~ s/[^a-zA-Z0-9]/_/g;
    if ($label =~ /^[0-9_]/) { $label = 'L' . $label; }
    $label = substr($label,0,8);

    # Could be a reserved word, so capitalize it.
    substr($label,0,1) =~ y/a-z/A-Z/
      if $label =~ /^[a-z]/;

    $label;
}

sub transmogrify {
    {	# case
	if (/^d/) {
	    $dseen++;
	    chop($_ = <<'EOT');
<<--#ifdef PRINTIT
$printit = '';
<<--#endif
next LINE;
EOT
	    next;
	}

	if (/^n/) {
	    chop($_ = <<'EOT');
<<--#ifdef PRINTIT
<<--#ifdef DSEEN
<<--#ifdef ASSUMEP
print if $printit++;
<<--#else
if ($printit)
    { print; }
else
    { $printit++ unless $nflag; }
<<--#endif
<<--#else
print if $printit;
<<--#endif
<<--#else
print;
<<--#endif
<<--#ifdef APPENDSEEN
if ($atext) {print $atext; $atext = '';}
<<--#endif
$_ = <>;
<<--#ifdef TSEEN
$tflag = '';
<<--#endif
EOT
	    next;
	}

	if (/^a/) {
	    $appendseen++;
	    $command = $space . '$atext .=' . "\n<<--'";
	    $lastline = 0;
	    while (<>) {
		s/^[ \t]*//;
		s/^[\\]//;
		unless (s|\\$||) { $lastline = 1;}
		s/'/\\'/g;
		s/^([ \t]*\n)/<><>$1/;
		$command .= $_;
		$command .= '<<--';
		last if $lastline;
	    }
	    $_ = $command . "';";
	    last;
	}

	if (/^[ic]/) {
	    if (/^c/) { $change = 1; }
	    $addr1 = '$iter = (' . $addr1 . ')';
	    $command = $space . 'if ($iter == 1) { print'
	      . "\n<<--'";
	    $lastline = 0;
	    while (<>) {
		s/^[ \t]*//;
		s/^[\\]//;
		unless (s/\\$//) { $lastline = 1;}
		s/'/\\'/g;
		s/^([ \t]*\n)/<><>$1/;
		$command .= $_;
		$command .= '<<--';
		last if $lastline;
	    }
	    $_ = $command . "';}";
	    if ($change) {
		$dseen++;
		$change = "$_\n";
		chop($_ = <<"EOT");
<<--#ifdef PRINTIT
$space\$printit = '';
<<--#endif
${space}next LINE;
EOT
	    }
	    last;
	}

	if (/^s/) {
	    $delim = substr($_,1,1);
	    $len = length($_);
	    $repl = $end = 0;
	    $inbracket = 0;
	    for ($i = 2; $i < $len; $i++) {
		$c = substr($_,$i,1);
		if ($c eq $delim) {
		    if ($inbracket) {
			substr($_, $i, 0) = '\\';
			$i++;
			$len++;
		    }
		    else {
			if ($repl) {
			    $end = $i;
			    last;
			} else {
			    $repl = $i;
			}
		    }
		}
		elsif ($c eq '\\') {
		    $i++;
		    if ($i >= $len) {
			$_ .= 'n';
			$_ .= <>;
			$len = length($_);
			$_ = substr($_,0,--$len);
		    }
		    elsif (substr($_,$i,1) =~ /^[n]$/) {
			;
		    }
		    elsif (!$repl &&
		      substr($_,$i,1) =~ /^[(){}\w]$/) {
			$i--;
			$len--;
			substr($_, $i, 1) = '';
		    }
		    elsif (!$repl &&
		      substr($_,$i,1) =~ /^[<>]$/) {
			substr($_,$i,1) = 'b';
		    }
		}
		elsif ($c eq '[' && !$repl) {
		    $i++ if substr($_,$i,1) eq '^';
		    $i++ if substr($_,$i,1) eq ']';
		    $inbracket = 1;
		}
		elsif ($c eq ']') {
		    $inbracket = 0;
		}
		elsif (!$repl && index("()+",$c) >= 0) {
		    substr($_, $i, 0) = '\\';
		    $i++;
		    $len++;
		}
	    }
	    &Die("Malformed substitution at line $.\n")
	      unless $end;
	    $pat = substr($_, 0, $repl + 1);
	    $repl = substr($_, $repl+1, $end-$repl-1);
	    $end = substr($_, $end + 1, 1000);
	    $dol = '$';
	    $repl =~ s/\$/\\$/;
	    $repl =~ s'&'$&'g;
	    $repl =~ s/[\\]([0-9])/$dol$1/g;
	    $subst = "$pat$repl$delim";
	    $cmd = '';
	    while ($end) {
		if ($end =~ s/^g//) {
		    $subst .= 'g';
		    next;
		}
		if ($end =~ s/^p//) {
		    $cmd .= ' && (print)';
		    next;
		}
		if ($end =~ s/^w[ \t]*//) {
		    $fh = &make_filehandle($end);
		    $cmd .= " && (print $fh \$_)";
		    $end = '';
		    next;
		}
		&Die("Unrecognized substitution command".
		  "($end) at line $.\n");
	    }
	    chop ($_ = <<"EOT");
<<--#ifdef TSEEN
$subst && \$tflag++$cmd;
<<--#else
$subst$cmd;
<<--#endif
EOT
	    next;
	}

	if (/^p/) {
	    $_ = 'print;';
	    next;
	}

	if (/^w/) {
	    s/^w[ \t]*//;
	    $fh = &make_filehandle($_);
	    $_ = "print $fh \$_;";
	    next;
	}

	if (/^r/) {
	    $appendseen++;
	    s/^r[ \t]*//;
	    $file = $_;
	    $_ = "\$atext .= `cat $file 2>/dev/null`;";
	    next;
	}

	if (/^P/) {
	    $_ = 'print $1 if /(^.*\n)/;';
	    next;
	}

	if (/^D/) {
	    chop($_ = <<'EOT');
s/^.*\n//;
redo LINE if $_;
next LINE;
EOT
	    next;
	}

	if (/^N/) {
	    chop($_ = <<'EOT');
$_ .= <>;
<<--#ifdef TSEEN
$tflag = '';
<<--#endif
EOT
	    next;
	}

	if (/^h/) {
	    $_ = '$hold = $_;';
	    next;
	}

	if (/^H/) {
	    $_ = '$hold .= $_ ? $_ : "\n";';
	    next;
	}

	if (/^g/) {
	    $_ = '$_ = $hold;';
	    next;
	}

	if (/^G/) {
	    $_ = '$_ .= $hold ? $hold : "\n";';
	    next;
	}

	if (/^x/) {
	    $_ = '($_, $hold) = ($hold, $_);';
	    next;
	}

	if (/^b$/) {
	    $_ = 'next LINE;';
	    next;
	}

	if (/^b/) {
	    s/^b[ \t]*//;
	    $lab = &make_label($_);
	    if ($lab eq $toplabel) {
		$_ = 'redo LINE;';
	    } else {
		$_ = "goto $lab;";
	    }
	    next;
	}

	if (/^t$/) {
	    $_ = 'next LINE if $tflag;';
	    $tseen++;
	    next;
	}

	if (/^t/) {
	    s/^t[ \t]*//;
	    $lab = &make_label($_);
	    $_ = q/if ($tflag) {$tflag = ''; /;
	    if ($lab eq $toplabel) {
		$_ .= 'redo LINE;}';
	    } else {
		$_ .= "goto $lab;}";
	    }
	    $tseen++;
	    next;
	}

	if (/^=/) {
	    $_ = 'print "$.\n";';
	    next;
	}

	if (/^q/) {
	    chop($_ = <<'EOT');
close(ARGV);
@ARGV = ();
next LINE;
EOT
	    next;
	}
    } continue {
	if ($space) {
	    s/^/$space/;
	    s/(\n)(.)/$1$space$2/g;
	}
	last;
    }
    $_;
}

sub fetchpat {
    local($outer) = @_;
    local($addr) = $outer;
    local($inbracket);
    local($prefix,$delim,$ch);

    # Process pattern one potential delimiter at a time.

    DELIM: while (s#^([^\]+(|)[\\/]*)([]+(|)[\\/])##) {
	$prefix = $1;
	$delim = $2;
	if ($delim eq '\\') {
	    s/(.)//;
	    $ch = $1;
	    $delim = '' if $ch =~ /^[(){}A-Za-mo-z]$/;
	    $ch = 'b' if $ch =~ /^[<>]$/;
	    $delim .= $ch;
	}
	elsif ($delim eq '[') {
	    $inbracket = 1;
	    s/^\^// && ($delim .= '^');
	    s/^]// && ($delim .= ']');
	}
	elsif ($delim eq ']') {
	    $inbracket = 0;
	}
	elsif ($inbracket || $delim ne $outer) {
	    $delim = '\\' . $delim;
	}
	$addr .= $prefix;
	$addr .= $delim;
	if ($delim eq $outer && !$inbracket) {
	    last DELIM;
	}
    }
    $addr;
}

!NO!SUBS!
chmod 755 s2p
$eunicefix s2p
Commit	Line	Data
a687059c	1	: This forces SH files to create target in same directory as SH file.
	2	: This is so that make depend always knows where to find SH derivatives.
	3	case "$0" in
	4	/) cd `expr X$0 : 'X\(.*\)/'` ;;
	5	esac
	6	case $CONFIG in
	7	'')
	8	if test ! -f config.sh; then
	9	ln ../config.sh . \|\| \
	10	ln ../../config.sh . \|\| \
	11	ln ../../../config.sh . \|\| \
	12	(echo "Can't find config.sh."; exit 1)
	13	fi
	14	. config.sh
	15	;;
	16	esac
	17	echo "Extracting s2p (with variable substitutions)"
	18	: This section of the file will have variable substitutions done on it.
	19	: Move anything that needs config subs from !NO!SUBS! section to !GROK!THIS!.
	20	: Protect any dollar signs and backticks that you do not want interpreted
	21	: by putting a backslash in front. You may delete these comments.
	22	$spitshell >s2p <<!GROK!THIS!
	23	#!$bin/perl
	24
	25	\$bin = '$bin';
	26	!GROK!THIS!
	27
	28	: In the following dollars and backticks do not need the extra backslash.
	29	$spitshell >>s2p <<'!NO!SUBS!'
	30
0a12ae7d	31	# $Header: s2p.SH,v 3.0.1.5 90/10/16 11:32:40 lwall Locked $
378cc40b	32	#
a687059c	33	# $Log: s2p.SH,v $
0a12ae7d	34	# Revision 3.0.1.5 90/10/16 11:32:40 lwall
	35	# patch29: s2p modernized
	36	#
00bf170e	37	# Revision 3.0.1.4 90/08/09 05:50:43 lwall
	38	# patch19: s2p didn't translate \n right
	39	#
9f68db38	40	# Revision 3.0.1.3 90/03/01 10:31:21 lwall
	41	# patch9: s2p didn't handle \< and \>
	42	#
ffed7fef	43	# Revision 3.0.1.2 89/11/17 15:51:27 lwall
	44	# patch5: in s2p, line labels without a subsequent statement were done wrong
	45	# patch5: s2p left residue in /tmp
	46	#
ae986130	47	# Revision 3.0.1.1 89/11/11 05:08:25 lwall
	48	# patch2: in s2p, + within patterns needed backslashing
	49	# patch2: s2p was printing out some debugging info to the output file
	50	#
a687059c	51	# Revision 3.0 89/10/18 15:35:02 lwall
	52	# 3.0 baseline
	53	#
	54	# Revision 2.0.1.1 88/07/11 23:26:23 root
	55	# patch2: s2p didn't put a proper prologue on output script
	56	#
378cc40b	57	# Revision 2.0 88/06/05 00:15:55 root
	58	# Baseline version 2.0.
	59	#
	60	#
8d063cd8	61
	62	$indent = 4;
	63	$shiftwidth = 4;
	64	$l = '{'; $r = '}';
8d063cd8	65
0a12ae7d	66	while ($ARGV[0] =~ /^-/) {
8d063cd8	67	$_ = shift;
	68	last if /^--/;
	69	if (/^-D/) {
	70	$debug++;
0a12ae7d	71	open(BODY,'>-');
8d063cd8	72	next;
	73	}
	74	if (/^-n/) {
	75	$assumen++;
	76	next;
	77	}
	78	if (/^-p/) {
	79	$assumep++;
	80	next;
	81	}
378cc40b	82	die "I don't recognize this switch: $_\n";
8d063cd8	83	}
	84
	85	unless ($debug) {
0a12ae7d	86	open(BODY,">/tmp/sperl$$") \|\|
0a12ae7d	87	&Die("Can't open temp file: $!\n");
8d063cd8	88	}
	89
	90	if (!$assumen && !$assumep) {
0a12ae7d	91	print BODY <<'EOT';
0a12ae7d	92	while ($ARGV[0] =~ /^-/) {
8d063cd8	93	$_ = shift;
	94	last if /^--/;
	95	if (/^-n/) {
	96	$nflag++;
	97	next;
	98	}
0a12ae7d	99	die "I don't recognize this switch: $_\\n";
8d063cd8	100	}
8d063cd8	101
0a12ae7d	102	EOT
8d063cd8	103	}
8d063cd8	104
0a12ae7d	105	print BODY <<'EOT';
0a12ae7d	106
8d063cd8	107	#ifdef PRINTIT
	108	#ifdef ASSUMEP
	109	$printit++;
	110	#else
	111	$printit++ unless $nflag;
	112	#endif
	113	#endif
0a12ae7d	114	LINE: while (<>) {
	115	EOT
	116
	117	LINE: while (<>) {
	118
	119	# Wipe out surrounding whitespace.
8d063cd8	120
8d063cd8	121	s/[ \t](.)\n$/$1/;
0a12ae7d	122
	123	# Perhaps it's a label/comment.
	124
8d063cd8	125	if (/^:/) {
8d063cd8	126	s/^:[ \t]*//;
0a12ae7d	127	$label = &make_label($_);
8d063cd8	128	if ($. == 1) {
	129	$toplabel = $label;
	130	}
	131	$_ = "$label:";
ffed7fef	132	if ($lastlinewaslabel++) {
ffed7fef	133	$indent += 4;
0a12ae7d	134	print BODY &tab, ";\n";
ffed7fef	135	$indent -= 4;
ffed7fef	136	}
8d063cd8	137	if ($indent >= 2) {
	138	$indent -= 2;
	139	$indmod = 2;
	140	}
	141	next;
	142	} else {
	143	$lastlinewaslabel = '';
	144	}
0a12ae7d	145
	146	# Look for one or two address clauses
	147
8d063cd8	148	$addr1 = '';
	149	$addr2 = '';
	150	if (s/^([0-9]+)//) {
	151	$addr1 = "$1";
	152	}
	153	elsif (s/^\$//) {
	154	$addr1 = 'eof()';
	155	}
	156	elsif (s\|^/\|\|) {
0a12ae7d	157	$addr1 = &fetchpat('/');
8d063cd8	158	}
	159	if (s/^,//) {
	160	if (s/^([0-9]+)//) {
	161	$addr2 = "$1";
	162	} elsif (s/^\$//) {
	163	$addr2 = "eof()";
	164	} elsif (s\|^/\|\|) {
0a12ae7d	165	$addr2 = &fetchpat('/');
8d063cd8	166	} else {
0a12ae7d	167	&Die("Invalid second address at line $.\n");
8d063cd8	168	}
	169	$addr1 .= " .. $addr2";
	170	}
0a12ae7d	171
	172	# Now we check for metacommands {, }, and ! and worry
	173	# about indentation.
	174
378cc40b	175	s/^[ \t]+//;
0a12ae7d	176	# a { to keep vi happy
8d063cd8	177	if ($_ eq '}') {
	178	$indent -= 4;
	179	next;
	180	}
	181	if (s/^!//) {
	182	$if = 'unless';
	183	$else = "$r else $l\n";
	184	} else {
	185	$if = 'if';
	186	$else = '';
	187	}
	188	if (s/^{//) { # a } to keep vi happy
	189	$indmod = 4;
	190	$redo = $_;
	191	$_ = '';
	192	$rmaybe = '';
	193	} else {
	194	$rmaybe = "\n$r";
	195	if ($addr2 \|\| $addr1) {
a687059c	196	$space = ' ' x $shiftwidth;
8d063cd8	197	} else {
	198	$space = '';
	199	}
0a12ae7d	200	$_ = &transmogrify();
8d063cd8	201	}
8d063cd8	202
0a12ae7d	203	# See if we can optimize to modifier form.
0a12ae7d	204
8d063cd8	205	if ($addr1) {
	206	if ($_ !~ /[\n{}]/ && $rmaybe && !$change &&
	207	$_ !~ / if / && $_ !~ / unless /) {
	208	s/;$/ $if $addr1;/;
	209	$_ = substr($_,$shiftwidth,1000);
	210	} else {
0a12ae7d	211	$_ = "$if ($addr1) $l\n$change$_$rmaybe";
8d063cd8	212	}
8d063cd8	213	$change = '';
0a12ae7d	214	next LINE;
8d063cd8	215	}
	216	} continue {
	217	@lines = split(/\n/,$_);
0a12ae7d	218	for (@lines) {
8d063cd8	219	unless (s/^ *<<--//) {
0a12ae7d	220	print BODY &tab;
8d063cd8	221	}
0a12ae7d	222	print BODY $_, "\n";
8d063cd8	223	}
	224	$indent += $indmod;
	225	$indmod = 0;
	226	if ($redo) {
	227	$_ = $redo;
	228	$redo = '';
0a12ae7d	229	redo LINE;
8d063cd8	230	}
8d063cd8	231	}
ffed7fef	232	if ($lastlinewaslabel++) {
ffed7fef	233	$indent += 4;
0a12ae7d	234	print BODY &tab, ";\n";
ffed7fef	235	$indent -= 4;
ffed7fef	236	}
8d063cd8	237
0a12ae7d	238	print BODY "}\n";
8d063cd8	239	if ($appendseen \|\| $tseen \|\| !$assumen) {
8d063cd8	240	$printit++ if $dseen \|\| (!$assumen && !$assumep);
0a12ae7d	241	print BODY <<'EOT';
0a12ae7d	242
8d063cd8	243	continue {
	244	#ifdef PRINTIT
	245	#ifdef DSEEN
	246	#ifdef ASSUMEP
	247	print if $printit++;
	248	#else
0a12ae7d	249	if ($printit)
	250	{ print; }
	251	else
	252	{ $printit++ unless $nflag; }
8d063cd8	253	#endif
	254	#else
	255	print if $printit;
	256	#endif
	257	#else
	258	print;
	259	#endif
	260	#ifdef TSEEN
0a12ae7d	261	$tflag = '';
8d063cd8	262	#endif
8d063cd8	263	#ifdef APPENDSEEN
0a12ae7d	264	if ($atext) { print $atext; $atext = ''; }
8d063cd8	265	#endif
8d063cd8	266	}
0a12ae7d	267	EOT
8d063cd8	268	}
8d063cd8	269
0a12ae7d	270	close BODY;
8d063cd8	271
8d063cd8	272	unless ($debug) {
0a12ae7d	273	open(HEAD,">/tmp/sperl2$$.c")
	274	\|\| &Die("Can't open temp file 2: $!\n");
	275	print HEAD "#define PRINTIT\n" if ($printit);
	276	print HEAD "#define APPENDSEEN\n" if ($appendseen);
	277	print HEAD "#define TSEEN\n" if ($tseen);
	278	print HEAD "#define DSEEN\n" if ($dseen);
	279	print HEAD "#define ASSUMEN\n" if ($assumen);
	280	print HEAD "#define ASSUMEP\n" if ($assumep);
	281	if ($opens) {print HEAD "$opens\n";}
	282	open(BODY,"/tmp/sperl$$")
	283	\|\| &Die("Can't reopen temp file: $!\n");
	284	while (<BODY>) {
	285	print HEAD $_;
8d063cd8	286	}
0a12ae7d	287	close HEAD;
8d063cd8	288
0a12ae7d	289	print <<"EOT";
	290	#!$bin/perl
	291	eval 'exec $bin/perl -S \$0 \$*'
a687059c	292	if \$running_under_some_shell;
a687059c	293
0a12ae7d	294	EOT
	295	open(BODY,"cc -E /tmp/sperl2$$.c \|") \|\|
	296	&Die("Can't reopen temp file: $!\n");
	297	while (<BODY>) {
8d063cd8	298	/^# [0-9]/ && next;
	299	/^[ \t]*$/ && next;
	300	s/^<><>//;
	301	print;
	302	}
	303	}
	304
0a12ae7d	305	&Cleanup;
0a12ae7d	306	exit;
8d063cd8	307
0a12ae7d	308	sub Cleanup {
	309	chdir "/tmp";
	310	unlink "sperl$$", "sperl2$$", "sperl2$$.c";
	311	}
8d063cd8	312	sub Die {
0a12ae7d	313	&Cleanup;
8d063cd8	314	die $_[0];
8d063cd8	315	}
0a12ae7d	316	sub tab {
	317	"\t" x ($indent / 8) . ' ' x ($indent % 8);
	318	}
8d063cd8	319	sub make_filehandle {
0a12ae7d	320	local($_) = $_[0];
0a12ae7d	321	local($fname) = $_;
8d063cd8	322	s/[^a-zA-Z]/_/g;
8d063cd8	323	s/^_*//;
0a12ae7d	324	substr($_,0,1) =~ y/a-z/A-Z/ if /^[a-z]/;
8d063cd8	325	if (!$seen{$_}) {
0a12ae7d	326	$opens .= <<"EOT";
	327	open($_,'>$fname') \|\| die "Can't create $fname";
	328	EOT
8d063cd8	329	}
	330	$seen{$_} = $_;
	331	}
	332
	333	sub make_label {
0a12ae7d	334	local($label) = @_;
8d063cd8	335	$label =~ s/[^a-zA-Z0-9]/_/g;
	336	if ($label =~ /^[0-9_]/) { $label = 'L' . $label; }
	337	$label = substr($label,0,8);
0a12ae7d	338
	339	# Could be a reserved word, so capitalize it.
	340	substr($label,0,1) =~ y/a-z/A-Z/
	341	if $label =~ /^[a-z]/;
	342
8d063cd8	343	$label;
	344	}
	345
	346	sub transmogrify {
	347	{ # case
	348	if (/^d/) {
	349	$dseen++;
0a12ae7d	350	chop($_ = <<'EOT');
8d063cd8	351	<<--#ifdef PRINTIT
0a12ae7d	352	$printit = '';
8d063cd8	353	<<--#endif
0a12ae7d	354	next LINE;
0a12ae7d	355	EOT
8d063cd8	356	next;
	357	}
	358
	359	if (/^n/) {
0a12ae7d	360	chop($_ = <<'EOT');
0a12ae7d	361	<<--#ifdef PRINTIT
8d063cd8	362	<<--#ifdef DSEEN
	363	<<--#ifdef ASSUMEP
	364	print if $printit++;
	365	<<--#else
0a12ae7d	366	if ($printit)
	367	{ print; }
	368	else
	369	{ $printit++ unless $nflag; }
8d063cd8	370	<<--#endif
	371	<<--#else
	372	print if $printit;
	373	<<--#endif
	374	<<--#else
	375	print;
	376	<<--#endif
	377	<<--#ifdef APPENDSEEN
0a12ae7d	378	if ($atext) {print $atext; $atext = '';}
8d063cd8	379	<<--#endif
	380	$_ = <>;
	381	<<--#ifdef TSEEN
0a12ae7d	382	$tflag = '';
	383	<<--#endif
	384	EOT
8d063cd8	385	next;
	386	}
	387
	388	if (/^a/) {
	389	$appendseen++;
0a12ae7d	390	$command = $space . '$atext .=' . "\n<<--'";
8d063cd8	391	$lastline = 0;
	392	while (<>) {
	393	s/^[ \t]*//;
	394	s/^[\\]//;
	395	unless (s\|\\$\|\|) { $lastline = 1;}
	396	s/'/\\'/g;
	397	s/^([ \t]*\n)/<><>$1/;
	398	$command .= $_;
	399	$command .= '<<--';
	400	last if $lastline;
	401	}
	402	$_ = $command . "';";
	403	last;
	404	}
	405
	406	if (/^[ic]/) {
	407	if (/^c/) { $change = 1; }
	408	$addr1 = '$iter = (' . $addr1 . ')';
0a12ae7d	409	$command = $space . 'if ($iter == 1) { print'
0a12ae7d	410	. "\n<<--'";
8d063cd8	411	$lastline = 0;
	412	while (<>) {
	413	s/^[ \t]*//;
	414	s/^[\\]//;
	415	unless (s/\\$//) { $lastline = 1;}
	416	s/'/\\'/g;
	417	s/^([ \t]*\n)/<><>$1/;
	418	$command .= $_;
	419	$command .= '<<--';
	420	last if $lastline;
	421	}
	422	$_ = $command . "';}";
	423	if ($change) {
	424	$dseen++;
	425	$change = "$_\n";
0a12ae7d	426	chop($_ = <<"EOT");
8d063cd8	427	<<--#ifdef PRINTIT
	428	$space\$printit = '';
	429	<<--#endif
0a12ae7d	430	${space}next LINE;
0a12ae7d	431	EOT
8d063cd8	432	}
	433	last;
	434	}
	435
	436	if (/^s/) {
	437	$delim = substr($_,1,1);
	438	$len = length($_);
	439	$repl = $end = 0;
a687059c	440	$inbracket = 0;
8d063cd8	441	for ($i = 2; $i < $len; $i++) {
8d063cd8	442	$c = substr($_,$i,1);
a687059c	443	if ($c eq $delim) {
a687059c	444	if ($inbracket) {
0a12ae7d	445	substr($_, $i, 0) = '\\';
a687059c	446	$i++;
	447	$len++;
	448	}
	449	else {
	450	if ($repl) {
	451	$end = $i;
	452	last;
	453	} else {
	454	$repl = $i;
	455	}
	456	}
	457	}
	458	elsif ($c eq '\\') {
8d063cd8	459	$i++;
	460	if ($i >= $len) {
	461	$_ .= 'n';
	462	$_ .= <>;
	463	$len = length($_);
	464	$_ = substr($_,0,--$len);
	465	}
00bf170e	466	elsif (substr($_,$i,1) =~ /^[n]$/) {
	467	;
	468	}
0a12ae7d	469	elsif (!$repl &&
0a12ae7d	470	substr($_,$i,1) =~ /^[(){}\w]$/) {
8d063cd8	471	$i--;
8d063cd8	472	$len--;
0a12ae7d	473	substr($_, $i, 1) = '';
8d063cd8	474	}
0a12ae7d	475	elsif (!$repl &&
0a12ae7d	476	substr($_,$i,1) =~ /^[<>]$/) {
9f68db38	477	substr($_,$i,1) = 'b';
9f68db38	478	}
8d063cd8	479	}
a687059c	480	elsif ($c eq '[' && !$repl) {
	481	$i++ if substr($_,$i,1) eq '^';
	482	$i++ if substr($_,$i,1) eq ']';
	483	$inbracket = 1;
8d063cd8	484	}
a687059c	485	elsif ($c eq ']') {
	486	$inbracket = 0;
	487	}
ae986130	488	elsif (!$repl && index("()+",$c) >= 0) {
0a12ae7d	489	substr($_, $i, 0) = '\\';
8d063cd8	490	$i++;
	491	$len++;
	492	}
	493	}
0a12ae7d	494	&Die("Malformed substitution at line $.\n")
0a12ae7d	495	unless $end;
8d063cd8	496	$pat = substr($_, 0, $repl + 1);
0a12ae7d	497	$repl = substr($_, $repl+1, $end-$repl-1);
8d063cd8	498	$end = substr($_, $end + 1, 1000);
8d063cd8	499	$dol = '$';
378cc40b	500	$repl =~ s/\$/\\$/;
8d063cd8	501	$repl =~ s'&'$&'g;
	502	$repl =~ s/[\\]([0-9])/$dol$1/g;
	503	$subst = "$pat$repl$delim";
	504	$cmd = '';
	505	while ($end) {
0a12ae7d	506	if ($end =~ s/^g//) {
	507	$subst .= 'g';
	508	next;
	509	}
	510	if ($end =~ s/^p//) {
	511	$cmd .= ' && (print)';
	512	next;
	513	}
8d063cd8	514	if ($end =~ s/^w[ \t]*//) {
0a12ae7d	515	$fh = &make_filehandle($end);
8d063cd8	516	$cmd .= " && (print $fh \$_)";
	517	$end = '';
	518	next;
	519	}
0a12ae7d	520	&Die("Unrecognized substitution command".
0a12ae7d	521	"($end) at line $.\n");
8d063cd8	522	}
0a12ae7d	523	chop ($_ = <<"EOT");
0a12ae7d	524	<<--#ifdef TSEEN
a687059c	525	$subst && \$tflag++$cmd;
	526	<<--#else
	527	$subst$cmd;
0a12ae7d	528	<<--#endif
0a12ae7d	529	EOT
8d063cd8	530	next;
	531	}
	532
	533	if (/^p/) {
	534	$_ = 'print;';
	535	next;
	536	}
	537
	538	if (/^w/) {
	539	s/^w[ \t]*//;
0a12ae7d	540	$fh = &make_filehandle($_);
8d063cd8	541	$_ = "print $fh \$_;";
	542	next;
	543	}
	544
	545	if (/^r/) {
	546	$appendseen++;
	547	s/^r[ \t]*//;
	548	$file = $_;
	549	$_ = "\$atext .= `cat $file 2>/dev/null`;";
	550	next;
	551	}
	552
	553	if (/^P/) {
a687059c	554	$_ = 'print $1 if /(^.*\n)/;';
8d063cd8	555	next;
	556	}
	557
	558	if (/^D/) {
0a12ae7d	559	chop($_ = <<'EOT');
	560	s/^.*\n//;
	561	redo LINE if $_;
	562	next LINE;
	563	EOT
8d063cd8	564	next;
	565	}
	566
	567	if (/^N/) {
0a12ae7d	568	chop($_ = <<'EOT');
8d063cd8	569	$_ .= <>;
8d063cd8	570	<<--#ifdef TSEEN
0a12ae7d	571	$tflag = '';
	572	<<--#endif
	573	EOT
8d063cd8	574	next;
	575	}
	576
	577	if (/^h/) {
	578	$_ = '$hold = $_;';
	579	next;
	580	}
	581
	582	if (/^H/) {
	583	$_ = '$hold .= $_ ? $_ : "\n";';
	584	next;
	585	}
	586
	587	if (/^g/) {
	588	$_ = '$_ = $hold;';
	589	next;
	590	}
	591
	592	if (/^G/) {
	593	$_ = '$_ .= $hold ? $hold : "\n";';
	594	next;
	595	}
	596
	597	if (/^x/) {
	598	$_ = '($_, $hold) = ($hold, $_);';
	599	next;
	600	}
	601
	602	if (/^b$/) {
0a12ae7d	603	$_ = 'next LINE;';
8d063cd8	604	next;
	605	}
	606
	607	if (/^b/) {
	608	s/^b[ \t]*//;
0a12ae7d	609	$lab = &make_label($_);
8d063cd8	610	if ($lab eq $toplabel) {
0a12ae7d	611	$_ = 'redo LINE;';
8d063cd8	612	} else {
	613	$_ = "goto $lab;";
	614	}
	615	next;
	616	}
	617
	618	if (/^t$/) {
0a12ae7d	619	$_ = 'next LINE if $tflag;';
8d063cd8	620	$tseen++;
	621	next;
	622	}
	623
	624	if (/^t/) {
	625	s/^t[ \t]*//;
0a12ae7d	626	$lab = &make_label($_);
0a12ae7d	627	$_ = q/if ($tflag) {$tflag = ''; /;
8d063cd8	628	if ($lab eq $toplabel) {
0a12ae7d	629	$_ .= 'redo LINE;}';
8d063cd8	630	} else {
0a12ae7d	631	$_ .= "goto $lab;}";
8d063cd8	632	}
	633	$tseen++;
	634	next;
	635	}
	636
	637	if (/^=/) {
	638	$_ = 'print "$.\n";';
	639	next;
	640	}
	641
	642	if (/^q/) {
0a12ae7d	643	chop($_ = <<'EOT');
0a12ae7d	644	close(ARGV);
8d063cd8	645	@ARGV = ();
0a12ae7d	646	next LINE;
0a12ae7d	647	EOT
8d063cd8	648	next;
	649	}
	650	} continue {
	651	if ($space) {
	652	s/^/$space/;
	653	s/(\n)(.)/$1$space$2/g;
	654	}
	655	last;
	656	}
	657	$_;
	658	}
	659
a687059c	660	sub fetchpat {
	661	local($outer) = @_;
	662	local($addr) = $outer;
	663	local($inbracket);
	664	local($prefix,$delim,$ch);
	665
0a12ae7d	666	# Process pattern one potential delimiter at a time.
	667
	668	DELIM: while (s#^([^\]+(\|)[\\/]*)([]+(\|)[\\/])##) {
a687059c	669	$prefix = $1;
a687059c	670	$delim = $2;
a687059c	671	if ($delim eq '\\') {
	672	s/(.)//;
	673	$ch = $1;
00bf170e	674	$delim = '' if $ch =~ /^[(){}A-Za-mo-z]$/;
9f68db38	675	$ch = 'b' if $ch =~ /^[<>]$/;
9f68db38	676	$delim .= $ch;
a687059c	677	}
	678	elsif ($delim eq '[') {
	679	$inbracket = 1;
	680	s/^\^// && ($delim .= '^');
	681	s/^]// && ($delim .= ']');
a687059c	682	}
	683	elsif ($delim eq ']') {
	684	$inbracket = 0;
	685	}
	686	elsif ($inbracket \|\| $delim ne $outer) {
a687059c	687	$delim = '\\' . $delim;
	688	}
	689	$addr .= $prefix;
	690	$addr .= $delim;
	691	if ($delim eq $outer && !$inbracket) {
0a12ae7d	692	last DELIM;
a687059c	693	}
	694	}
	695	$addr;
	696	}
	697
	698	!NO!SUBS!
	699	chmod 755 s2p
	700	$eunicefix s2p