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-rwxr-xr-xshare/backref.pl192
1 files changed, 192 insertions, 0 deletions
diff --git a/share/backref.pl b/share/backref.pl
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index 0000000..0630022
--- /dev/null
+++ b/share/backref.pl
@@ -0,0 +1,192 @@
+#!/usr/bin/env perl
+#
+# Cross-reference RFC attributes.
+#
+# $Id$
+#
+
+$begin_vendor = 0;
+$blank = 0;
+
+while (@ARGV) {
+ $filename = shift;
+
+ open FILE, "<$filename" or die "Failed to open $filename: $!\n";
+
+ @output = ();
+
+ while (<FILE>) {
+ #
+ # Clear out trailing whitespace
+ #
+ s/[ \t]+$//;
+
+ #
+ # And CR's
+ #
+ s/\r//g;
+
+ #
+ # Suppress multiple blank lines
+ #
+ if (/^\s+$/) {
+ next if ($blank == 1);
+ $blank = 1;
+ next;
+ }
+ $blank = 0;
+
+ #
+ # Remember the vendor
+ #
+ if (/^VENDOR\s+([\w-]+)\s+(\w+)(.*)/) {
+ $name=$1;
+ $len = length $name;
+ if ($len < 32) {
+ $lenx = 32 - $len;
+ $lenx += 7; # round up
+ $lenx /= 8;
+ $lenx = int $lenx;
+ $tabs = "\t" x $lenx;
+ } else {
+ $tabs = " ";
+ }
+ $vendor = $name;
+ next;
+ }
+
+ #
+ # Remember if we did begin-vendor.
+ #
+ if (/^BEGIN-VENDOR\s+([\w-]+)/) {
+ $begin_vendor = 1;
+ if (!defined $vendor) {
+ $vendor = $1;
+ } elsif ($vendor ne $1) {
+ # do something smart
+ }
+
+ next;
+ }
+
+ #
+ # Get attribute.
+ #
+ if (/^ATTRIBUTE\s+([\w-]+)\s+(\w+)\s+(\w+)(.*)/) {
+ $name=$1;
+ $len = length $name;
+ if ($len < 40) {
+ $lenx = 40 - $len;
+ $lenx += 7; # round up
+ $lenx /= 8;
+ $lenx = int $lenx;
+ $tabs = "\t" x $lenx;
+ if ($tabs eq "") {
+ $tabs = " ";
+ }
+ } else {
+ $tabs = " ";
+ }
+
+ $value = $2;
+ $type = $3;
+ $stuff = $4;
+
+ if ($begin_vendor == 0) {
+ #
+ # FIXME: Catch and print conflicting attributes.
+ #
+ $file{$value} = $filename;
+ $file{$value} =~ s/dictionary\.//;
+ $name{$value} = $name . $tabs;
+ }
+
+ #
+ # See if it's old format, with the vendor at the end of
+ # the line. If so, make it the new format.
+ #
+ if ($stuff =~ /$vendor/) {
+ if ($begin_vendor == 0) {
+ $begin_vendor = 1;
+ }
+ $stuff =~ s/$vendor//;
+ $stuff =~ s/\s+$//;
+ }
+
+ next;
+ }
+
+ #
+ # Values.
+ #
+ if (/^VALUE\s+([\w-]+)\s+([\w-\/,.]+)\s+(\w+)(.*)/) {
+ $attr=$1;
+ $len = length $attr;
+ if ($len < 32) {
+ $lenx = 32 - $len;
+ $lenx += 7; # round up
+ $lenx /= 8;
+ $lenx = int $lenx;
+ $tabsa = "\t" x $lenx;
+ if ($tabsa eq "") {
+ $tabsa = " ";
+ $len += 1;
+ } else {
+ $len -= $len % 8;
+ $len += 8 * length $tabsa;
+ }
+ } else {
+ $tabsa = " ";
+ $len += 1;
+ }
+
+ #
+ # For the code below, we assume that the attribute lengths
+ #
+ if ($len < 32) {
+ $lena = 0;
+ } else {
+ $lena = $len - 32;
+ }
+
+ $name = $2;
+ $len = length $name;
+ if ($len < 24) {
+ $lenx = 24 - $lena - $len;
+ $lenx += 7; # round up
+ $lenx /= 8;
+ $lenx = int $lenx;
+ $tabsn = "\t" x $lenx;
+ if ($tabsn eq "") {
+ $tabsn = " ";
+ }
+ } else {
+ $tabsn = " ";
+ }
+
+ next;
+ }
+
+ #
+ # Remember if we did this.
+ #
+ if (/^END-VENDOR/) {
+ $begin_vendor = 0;
+ }
+
+ #
+ # Everything else gets dumped out as-is.
+ #
+ }
+
+ close FILE;
+
+}
+
+#
+# Print out the attributes.
+#
+foreach $attr (sort {$a <=> $b} keys %file) {
+ print $name{$attr}, $attr, "\t", $file{$attr}, "\n";
+}
+