libjava/classes.pl

   1 # classes.pl - A perl program to generate most of the contents of
   2 # javaprims.h automatically.
   3
   4 # Copyright (C) 1998, 1999  Cygnus Solutions
   5 #
   6 # This file is part of libjava.
   7 #
   8 # This software is copyrighted work licensed under the terms of the
   9 # Libjava License.  Please consult the file "LIBJAVA_LICENSE" for
  10 # details.
  11
  12 # Usage: cd <top-srcdir> ; perl classes.pl.
  13 # Can also be run from the `include' directory; this lets us
  14 # more easily insert the output into javaprims.h (which is where it goes).
  15
  16 use DirHandle;
  17
  18 if (-d 'java')
  19 {
  20     # Ok here.
  21 }
  22 elsif (-d '../java')
  23 {
  24     chdir ('..');
  25 }
  26 else
  27 {
  28     die "couldn't find java directory\n";
  29 }
  30
  31 &scan ('java', 2);
  32
  33 exit 0;
  34
  35 sub scan
  36 {
  37     local ($dir, $indent) = @_;
  38     local (@subdirs) = ();
  39     local (%classes) = ();
  40
  41     local ($d) = new DirHandle $dir;
  42     local (*JFILE);
  43     local ($name);
  44     if (defined $d)
  45     {
  46         while (defined ($name = $d->read))
  47         {
  48             next if $name eq 'CVS';
  49             next if $name eq '.';
  50             next if $name eq '..';
  51             if ($dir eq 'java'
  52                 && $name ne 'lang'
  53                 && $name ne 'util'
  54                 && $name ne 'io')
  55             {
  56                 # We only generate decls for java.lang, java.io, and
  57                 # java.util.
  58                 next;
  59             }
  60             if (-d ($dir . '/' . $name))
  61             {
  62                 push (@subdirs, $name);
  63                 next;
  64             }
  65             next unless $name =~ /\.java$/;
  66
  67             open (FILE, "< $dir/$name");
  68             while (<FILE>)
  69             {
  70                 # NOTE: we don't skip `/*' comments.
  71                 s,//.*$,,;
  72                 # For now assume that class names start with upper
  73                 # case letter.
  74                 next unless /(class|interface) ([A-Z][A-Za-z0-9]+)/;
  75                 $classes{$2} = 1;
  76             }
  77             close (FILE);
  78         }
  79
  80         undef $d;
  81     }
  82
  83     local ($spaces) = ' ' x $indent;
  84     local ($classname);
  85     ($classname = $dir) =~ s/^.*\///;
  86     print $spaces, "namespace ", $classname, "\n";
  87     print $spaces, "{\n";
  88
  89     foreach (sort keys %classes)
  90     {
  91         print $spaces, "  class ", $_, ";\n";
  92     }
  93     print "\n" if scalar @classes > 0 && scalar @subdirs > 0;
  94
  95     local ($first) = 1;
  96     foreach (sort @subdirs)
  97     {
  98         print "\n" unless $first;
  99         $first = 0;
 100         &scan ("$dir/$_", $indent + 2);
 101     }
 102
 103     print $spaces, "};\n";
 104 }