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vmg committed Oct 10, 2014
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313 changes: 313 additions & 0 deletions 132html
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#! /usr/bin/perl -w

# Script to turn PCRE man pages into HTML


# Subroutine to handle font changes and other escapes

sub do_line {
my($s) = $_[0];

$s =~ s/</&#60;/g; # Deal with < and >
$s =~ s/>/&#62;/g;
$s =~ s"\\fI(.*?)\\f[RP]"<i>$1</i>"g;
$s =~ s"\\fB(.*?)\\f[RP]"<b>$1</b>"g;
$s =~ s"\\e"\\"g;
$s =~ s/(?<=Copyright )\(c\)/&copy;/g;
$s;
}

# Subroutine to ensure not in a paragraph

sub end_para {
if ($inpara)
{
print TEMP "</PRE>\n" if ($inpre);
print TEMP "</P>\n";
}
$inpara = $inpre = 0;
$wrotetext = 0;
}

# Subroutine to start a new paragraph

sub new_para {
&end_para();
print TEMP "<P>\n";
$inpara = 1;
}


# Main program

$innf = 0;
$inpara = 0;
$inpre = 0;
$wrotetext = 0;
$toc = 0;
$ref = 1;

while ($#ARGV >= 0 && $ARGV[0] =~ /^-/)
{
$toc = 1 if $ARGV[0] eq "-toc";
shift;
}

# Initial output to STDOUT

print <<End ;
<html>
<head>
<title>$ARGV[0] specification</title>
</head>
<body bgcolor="#FFFFFF" text="#00005A" link="#0066FF" alink="#3399FF" vlink="#2222BB">
<h1>$ARGV[0] man page</h1>
<p>
Return to the <a href="index.html">PCRE index page</a>.
</p>
<p>
This page is part of the PCRE HTML documentation. It was generated automatically
from the original man page. If there is any nonsense in it, please consult the
man page, in case the conversion went wrong.
<br>
End

print "<ul>\n" if ($toc);

open(TEMP, ">/tmp/$$") || die "Can't open /tmp/$$ for output\n";

while (<STDIN>)
{
# Handle lines beginning with a dot

if (/^\./)
{
# Some of the PCRE man pages used to contain instances of .br. However,
# they should have all been removed because they cause trouble in some
# (other) automated systems that translate man pages to HTML. Complain if
# we find .br or .in (another macro that is deprecated).

if (/^\.br/ || /^\.in/)
{
print STDERR "\n*** Deprecated macro encountered - rewrite needed\n";
print STDERR "*** $_\n";
die "*** Processing abandoned\n";
}

# Instead of .br, relevent "literal" sections are enclosed in .nf/.fi.

elsif (/^\.nf/)
{
$innf = 1;
}

elsif (/^\.fi/)
{
$innf = 0;
}

# Handling .sp is subtle. If it is inside a literal section, do nothing if
# the next line is a non literal text line; similarly, if not inside a
# literal section, do nothing if a literal follows, unless we are inside
# a .nf/.ne section. The point being that the <pre> and </pre> that delimit
# literal sections will do the spacing. Always skip if no previous output.

elsif (/^\.sp/)
{
if ($wrotetext)
{
$_ = <STDIN>;
if ($inpre)
{
print TEMP "\n" if (/^[\s.]/);
}
else
{
print TEMP "<br>\n<br>\n" if ($innf || !/^[\s.]/);
}
redo; # Now process the lookahead line we just read
}
}
elsif (/^\.TP/ || /^\.PP/ || /^\.P/)
{
&new_para();
}
elsif (/^\.SH\s*("?)(.*)\1/)
{
# Ignore the NAME section
if ($2 =~ /^NAME\b/)
{
<STDIN>;
next;
}

&end_para();
my($title) = &do_line($2);
if ($toc)
{
printf("<li><a name=\"TOC%d\" href=\"#SEC%d\">$title</a>\n",
$ref, $ref);
printf TEMP ("<br><a name=\"SEC%d\" href=\"#TOC1\">$title</a><br>\n",
$ref, $ref);
$ref++;
}
else
{
print TEMP "<br><b>\n$title\n</b><br>\n";
}
}
elsif (/^\.SS\s*("?)(.*)\1/)
{
&end_para();
my($title) = &do_line($2);
print TEMP "<br><b>\n$title\n</b><br>\n";
}
elsif (/^\.B\s*(.*)/)
{
&new_para() if (!$inpara);
$_ = &do_line($1);
s/"(.*?)"/$1/g;
print TEMP "<b>$_</b>\n";
$wrotetext = 1;
}
elsif (/^\.I\s*(.*)/)
{
&new_para() if (!$inpara);
$_ = &do_line($1);
s/"(.*?)"/$1/g;
print TEMP "<i>$_</i>\n";
$wrotetext = 1;
}

# A comment that starts "HREF" takes the next line as a name that
# is turned into a hyperlink, using the text given, which might be
# in a special font. If it ends in () or (digits) or punctuation, they
# aren't part of the link.

elsif (/^\.\\"\s*HREF/)
{
$_=<STDIN>;
chomp;
$_ = &do_line($_);
$_ =~ s/\s+$//;
$_ =~ /^(?:<.>)?([^<(]+)(?:\(\))?(?:<\/.>)?(?:\(\d+\))?[.,;:]?$/;
print TEMP "<a href=\"$1.html\">$_</a>\n";
}

# A comment that starts "HTML" inserts literal HTML

elsif (/^\.\\"\s*HTML\s*(.*)/)
{
print TEMP $1;
}

# A comment that starts < inserts that HTML at the end of the
# *next* input line - so as not to get a newline between them.

elsif (/^\.\\"\s*(<.*>)/)
{
my($markup) = $1;
$_=<STDIN>;
chomp;
$_ = &do_line($_);
$_ =~ s/\s+$//;
print TEMP "$_$markup\n";
}

# A comment that starts JOIN joins the next two lines together, with one
# space between them. Then that line is processed. This is used in some
# displays where two lines are needed for the "man" version. JOINSH works
# the same, except that it assumes this is a shell command, so removes
# continuation backslashes.

elsif (/^\.\\"\s*JOIN(SH)?/)
{
my($one,$two);
$one = <STDIN>;
$two = <STDIN>;
$one =~ s/\s*\\e\s*$// if (defined($1));
chomp($one);
$two =~ s/^\s+//;
$_ = "$one $two";
redo; # Process the joined lines
}

# .EX/.EE are used in the pcredemo page to bracket the entire program,
# which is unmodified except for turning backslash into "\e".

elsif (/^\.EX\s*$/)
{
print TEMP "<PRE>\n";
while (<STDIN>)
{
last if /^\.EE\s*$/;
s/\\e/\\/g;
s/&/&amp;/g;
s/</&lt;/g;
s/>/&gt;/g;
print TEMP;
}
}

# Ignore anything not recognized

next;
}

# Line does not begin with a dot. Replace blank lines with new paragraphs

if (/^\s*$/)
{
&end_para() if ($wrotetext);
next;
}

# Convert fonts changes and output an ordinary line. Ensure that indented
# lines are marked as literal.

$_ = &do_line($_);
&new_para() if (!$inpara);

if (/^\s/)
{
if (!$inpre)
{
print TEMP "<pre>\n";
$inpre = 1;
}
}
elsif ($inpre)
{
print TEMP "</pre>\n";
$inpre = 0;
}

# Add <br> to the end of a non-literal line if we are within .nf/.fi

$_ .= "<br>\n" if (!$inpre && $innf);

print TEMP;
$wrotetext = 1;
}

# The TOC, if present, will have been written - terminate it

print "</ul>\n" if ($toc);

# Copy the remainder to the standard output

close(TEMP);
open(TEMP, "/tmp/$$") || die "Can't open /tmp/$$ for input\n";

print while (<TEMP>);

print <<End ;
<p>
Return to the <a href="index.html">PCRE index page</a>.
</p>
End

close(TEMP);
unlink("/tmp/$$");

# End
45 changes: 45 additions & 0 deletions AUTHORS
Original file line number Diff line number Diff line change
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THE MAIN PCRE LIBRARY
---------------------

Written by: Philip Hazel
Email local part: ph10
Email domain: cam.ac.uk

University of Cambridge Computing Service,
Cambridge, England.

Copyright (c) 1997-2014 University of Cambridge
All rights reserved


PCRE JUST-IN-TIME COMPILATION SUPPORT
-------------------------------------

Written by: Zoltan Herczeg
Email local part: hzmester
Emain domain: freemail.hu

Copyright(c) 2010-2014 Zoltan Herczeg
All rights reserved.


STACK-LESS JUST-IN-TIME COMPILER
--------------------------------

Written by: Zoltan Herczeg
Email local part: hzmester
Emain domain: freemail.hu

Copyright(c) 2009-2014 Zoltan Herczeg
All rights reserved.


THE C++ WRAPPER LIBRARY
-----------------------

Written by: Google Inc.

Copyright (c) 2007-2012 Google Inc
All rights reserved

####
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