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#!/usr/bin/perl
use strict;
my @depth2latex = (
'\chapter',
'\section',
'\subsection',
'\subsubsection',
'\paragraph',
'\subparagraph'
);
my $skip_depth = 1;
sub find_footnotes {
my @text = @_;
my @notes = ();
my $found = 0;
my $l;
for ($l = 0; $l <= $#text; $l++) {
if ($text[$l] =~ m/^FOOTNOTES:$/) {
$found = 1;
}
next unless $found;
if ($text[$l] =~ m/^\[[0-9]+\]\s/) {
push @notes, $l;
}
}
return @notes;
};
sub find_sections {
my @text = @_;
my @sections = ();
my $l;
for ($l = 0; $l <= $#text - 1; $l++) {
next unless (($text[$l + 1] =~ m/^=======*$/) or
($text[$l + 1] =~ m/^-------*$/));
next unless ($text[$l] =~ m/^(([0-9]+\.)+) /);
push @sections, $l;
}
return @sections;
};
my @text = ();
while (<>) {
push @text, $_;
}
my @footnotes = find_footnotes(@text);
my @sections = find_sections(@text);
#Format footnotes
my %footnote_by_number = ();
my $f;
for ($f = 0; $f <= $#footnotes; $f++) {
my $l = $footnotes[$f];
die unless ($text[$l] =~ m/^\[([0-9]+)\]\s+(.*)/);
my $footnote = $1;
my $text = $2;
die "duplicate footnote number $footnote" if defined($footnote_by_number{$footnote});
$footnote_by_number{$footnote} = "$text\n";
my $next;
if ($f < $#footnotes) {
$next = $footnotes[$f + 1];
} else {
$next = $#text + 1;
}
for ($l = $footnotes[$f] + 1; $l < $next; $l++) {
next if ($text[$l] =~ m/^$/);
$footnote_by_number{$footnote} .= $text[$l];
}
}
#Format sections
my %label_by_section = ();
my $s;
my %latest_by_depth = ();
for ($s = 0; $s <= $#sections; $s++) {
my $l = $sections[$s];
die unless ($text[$l] =~ m/^(([0-9]+\.)+)\s+(.+)\s*/);
my $section = $1;
my $name = $3;
my @path = split(/\./, $section);
my $depth = $#path - $skip_depth;
if ($depth < 0) {
$depth = 0;
}
if ($depth > $#depth2latex) {
$depth = $#depth2latex;
}
$latest_by_depth{$#path} = $name;
my $type = $depth2latex[$depth];
my $label = $name;
#Prepend hierarchical path to make name unique
for (my $i = 1; $i <= $#path - $skip_depth; $i++) {
last if (not defined $latest_by_depth{$#path - $i});
$label = "$latest_by_depth{$#path - $i} / $label";
}
#It's best to avoid underscore in labels
$label =~ s/_/-/g;
$text[$l] = $type . "{$name}\\label{sec:$label}\n";
$label_by_section{$section} = $label;
}
my $ifndef = 0;
my $listing = 0;
my $table = 0;
my $buffer = "";
for my $line (@text) {
last if ($line =~ m/^FOOTNOTES:$/);
next if (($line =~ m/^=======*$/) or
($line =~ m/^-------*$/));
if ($line =~ m/^#if/) {
print "\\begin{lstlisting}\n";
$ifndef++;
}
if ($ifndef) {
if ($line =~ m/^#endif/) {
$ifndef--;
}
$buffer .= $line;
if (not $ifndef) {
print $buffer;
print "\\end{lstlisting}\n";
$buffer = "";
}
next;
}
if (not $table and $line =~ m/^\+\-/) {
print "\\begin{verbatim}\n";
$table = 1;
}
if ($table and not $line =~ m/^(\+\-|\|)/) {
print "\\end{verbatim}\n";
$table = 0;
}
if (not $listing and $line =~ m/^\t/) {
print "\\begin{lstlisting}\n";
$listing = 1;
}
if ($listing and $line =~ m/^$/) {
$buffer .= $line;
next;
}
if ($listing and not $line =~ m/^\t/) {
print "\\end{lstlisting}\n";
$listing = 0;
}
if (not $table and not $listing) {
if ($line =~ m/\S+\s*\^\s*\S+/) {
$line =~ s/(\S+\s*\^\s*)(\S+)/\$$1\{$2\}\$/g;
} else {
$line =~ s/\^/\\^/go;
}
$line =~ s/#/\\#/go;
$line =~ s/&/\\&/go;
if ($line =~ m/\[[0-9]+\]/) { #premature optimization
for my $n (keys(%footnote_by_number)) {
my $txt = $footnote_by_number{$n};
$line =~ s/\[$n\]/\n\\footnote{$txt}/g;
}
}
}
if ($line =~ m/"(([0-9]+\.)+)[^"]*"/) {
my $section = $1;
$line =~ s/"(([0-9]+\.)+)[^"]*"/\\ref{sec:$label_by_section{$section}}~\\nameref{sec:$label_by_section{$section}}/g;
}
print $buffer;
$buffer = "";
print $line;
}
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