Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 1 | #!/usr/bin/perl |
| 2 | |
| 3 | # |
| 4 | # $Id$ |
| 5 | # $Author$ |
| 6 | # |
| 7 | # Simple tool that fetches the ASN.1 specifications from the |
| 8 | # given set of RFC files. |
| 9 | # |
| 10 | |
| 11 | |
| 12 | my $inasn = 0; # Are we inside ASN.1 grammar? |
| 13 | my $found = 0; |
| 14 | |
| 15 | if(-t STDIN && $#ARGV == -1) { |
| 16 | print STDERR "Rip ASN.1 specification from RFC file\n"; |
| 17 | print STDERR "Usage: $0 <rfc-file.txt> ...\n"; |
| 18 | print STDERR "Usage: <someprog> | $0\n"; |
| 19 | exit(1); |
| 20 | } |
| 21 | |
| 22 | while(<>) { |
| 23 | # |
| 24 | # Strip RFC page delimiters. |
| 25 | # |
| 26 | next if /^[A-Z].*\[Page [0-9]+\]$/; |
| 27 | next if /^$/; |
| 28 | next if /^RFC [0-9].*[0-9]+$/; |
| 29 | |
| 30 | if($inasn == 0) { |
| 31 | # |
| 32 | # The least correct way to find the start of ASN |
| 33 | # definition. |
| 34 | # |
| 35 | if(/^[ \t]*END[ \t]*$/) { |
| 36 | print STDERR |
| 37 | "Missed an ASN.1 grammar before line ". $. ."?\n"; |
| 38 | exit(1); |
| 39 | } |
| 40 | |
| 41 | my $rfcid = ''; |
| 42 | $rfcid = $1 . '-' if($ARGV =~ /([a-z0-9]+)/i); |
| 43 | |
| 44 | if(/^[ \t]+([A-Za-z0-9-]+).*DEFINITIONS.*::=/) { |
| 45 | my $fname = $rfcid . $1 . ".asn1"; |
| 46 | open(O, "> $fname") or die "Can't open $fname"; |
| 47 | select(O); |
| 48 | $inasn = 1; |
| 49 | } elsif(/^[ \t]*([A-Za-z0-9-]+).*{.*iso/) { |
| 50 | my $fname = $rfcid . $1 . ".asn1"; |
| 51 | my @a = ($_); |
| 52 | my $i; |
| 53 | for($i = 0; $i < 8; $i++) { |
| 54 | $_ = <>; |
| 55 | push(@a, $_); |
| 56 | if(/DEFINITIONS/) { |
| 57 | $_ = join('', @a); |
| 58 | $inasn = 1; |
| 59 | last; |
| 60 | } |
| 61 | } |
| 62 | next unless $inasn; |
| 63 | open(O, "> $fname") or die "Can't open $fname"; |
| 64 | select(O); |
| 65 | } else { |
| 66 | next; |
| 67 | } |
| 68 | |
| 69 | $found++; |
| 70 | print "\n"; |
| 71 | print "-- \n"; |
Lev Walkin | 0110869 | 2004-09-05 10:39:05 +0000 | [diff] [blame^] | 72 | print "-- ASN.1 module found in $ARGV by $0 at " . $. . "\n"; |
Lev Walkin | f15320b | 2004-06-03 03:38:44 +0000 | [diff] [blame] | 73 | print "-- \n"; |
| 74 | print "\n"; |
| 75 | } |
| 76 | |
| 77 | print; |
| 78 | |
| 79 | if(/^[ \t]*END[ \t]*$/) { |
| 80 | select(STDOUT); |
| 81 | close(O); |
| 82 | $inasn = 0; |
| 83 | } |
| 84 | } |
| 85 | |
| 86 | die "No ASN.1 specifications found\n" unless $found; |