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|
#! /usr/bin/perl -w
use strict;
my @files = ();
my %defines = ();
for (@ARGV) {
if (/^-D(.*)$/) {
$defines{$1} = 1;
} elsif (/^-/) {
printf STDERR "Unknown option '".$_."'\n";
exit 1;
} else {
push @files, $_;
}
}
int(@files) or die "usage: $0 [-D<define>]... <qdoc-file>\n";
my @toc = ();
my %title2page = ();
my $doctitle = "";
my $curpage = "";
my $intoc = 0;
my %prev_skips = ();
my %next_skips = ();
my %define_skips = ();
my %polarity_skips = ();
my $prev_skip = "";
my $next_skip = "";
my $define_skip = "";
my $polarity_skip = 0;
for my $file (@files) {
my $skipping = 0; # no nested ifs!
open FILE, $file or die "File $file cannot be opened.\n";
while (<FILE>) {
if (/^\h*\\if\h+defined\h*\(\h*(\H+)\h*\)/) {
$skipping = !defined($defines{$1});
if (!$intoc) {
$define_skip = $1;
$polarity_skip = $skipping;
}
} elsif (/^\h*\\else/) {
$skipping = 1 - $skipping;
} elsif (/^\h*\\endif/) {
$skipping = 0;
} elsif (keys(%title2page) == 1 && /^\h*\\list/) {
$intoc++;
} elsif (!$intoc) {
if ($skipping && /^\h*\\previouspage\h+(\H+)/) {
$prev_skip = $1;
} elsif ($skipping && /^\h*\\nextpage\h+(\H+)/) {
$next_skip = $1;
} elsif (/^\h*\\page\h+(\H+)/) {
$curpage = $1;
} elsif (/^\h*\\title\h+(.+)$/) {
if ($curpage eq "") {
die "Title '$1' appears in no \\page.\n";
}
if (length($define_skip)) {
$define_skips{$1} = $define_skip;
$polarity_skips{$1} = $polarity_skip;
$prev_skips{$1} = $prev_skip;
$next_skips{$1} = $next_skip;
$define_skip = $prev_skip = $next_skip = "";
}
$title2page{$1} = $curpage;
$doctitle = $1 if (!$doctitle);
$curpage = "";
}
} else {
if (/^\h*\\endlist/) {
$intoc--;
} elsif (!$skipping && /^\h*\\(?:o|li)\h+\\l\h*{(.*)}$/) {
push @toc, $1;
}
}
}
close FILE;
}
my %prev = ();
my %next = ();
my $last = $doctitle;
for my $title (@toc) {
$next{$last} = $title2page{$title};
$prev{$title} = $title2page{$last};
$last = $title;
}
for my $file (@files) {
open IN, $file or die "File $file cannot be opened a second time?!\n";
open OUT, '>'.$file.".out" or die "File $file.out cannot be created.\n";
my $cutting = 0;
while (<IN>) {
if (!$cutting) {
if (/^\h*\\contentspage/) {
$cutting = 1;
}
} else {
if (/^\h*\\title\h+(.+)$/) {
if (defined($define_skips{$1})) {
print OUT " \\if defined(".$define_skips{$1}.")\n";
if ($polarity_skips{$1}) {
print OUT " \\previouspage ".$prev_skips{$1} if ($prev_skips{$1});
print OUT " \\else\n";
}
}
print OUT " \\previouspage ".$prev{$1} if ($prev{$1});
if (defined($define_skips{$1})) {
if (!$polarity_skips{$1}) {
print OUT " \\else\n";
print OUT " \\previouspage ".$prev_skips{$1} if ($prev_skips{$1});
}
print OUT " \\endif\n";
}
print OUT " \\page ".$title2page{$1};
if (defined($define_skips{$1})) {
print OUT " \\if defined(".$define_skips{$1}.")\n";
if ($polarity_skips{$1}) {
print OUT " \\nextpage ".$next_skips{$1} if ($next_skips{$1});
print OUT " \\else\n";
}
}
print OUT " \\nextpage ".$next{$1} if ($next{$1});
if (defined($define_skips{$1})) {
if (!$polarity_skips{$1}) {
print OUT " \\else\n";
print OUT " \\nextpage ".$next_skips{$1} if ($next_skips{$1});
}
print OUT " \\endif\n";
}
print OUT "\n";
$cutting = 0;
} else {
next;
}
}
print OUT $_;
}
close OUT;
close IN;
rename($file.".out", $file) or die "Cannot replace $file with new version.\n";
}
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