r13976: Add simple script for updating existing prototypes in a header file

(This used to be commit 265cfb39c386e6a630f14e2c339d62d2c3dfa12e)

1 files changed, 189 insertions, 0 deletions

diff --git a/source4/script/update-proto.pl b/source4/script/update-proto.pl
new file mode 100755
index 0000000000..d351e2dcfe
--- /dev/null
+++ b/source4/script/update-proto.pl
@@ -0,0 +1,189 @@
+#!/usr/bin/perl
+# Simple script for updating the prototypes in a C header file
+#
+# Copyright (C) 2006 Jelmer Vernooij <jelmer@samba.org>
+# Published under the GNU GPL
+#
+# TODO:
+#  - update for prototypes that span lines
+
+use strict;
+use warnings;
+use Getopt::Long;
+
+=head1 NAME
+
+update-proto - automatically update prototypes in header files
+
+=head1 SYNOPSIS
+
+update-proto [OPTIONS] <HEADER> <C-FILE>...
+
+update-proto [OPTIONS] <HEADER> 
+
+=head1 DESCRIPTION
+
+Update-proto makes sure the prototypes in a C header file are current
+by comparing the existing prototypes in a header with the function definition 
+in the source file. It aims to keep the diff between the original header 
+and generated one as small as possible.
+
+New prototypes are inserted before any line that contains the following comment:
+
+/* New prototypes are inserted above this line */
+
+It will automatically parse C files after it encounters a line that contains:
+
+/* The following definitions come from FILE */
+
+=head1 OPTIONS
+
+=over 4
+
+=item I<--verbose|-v>
+
+Increase verbosity. Currently only two levels of verbosity are used.
+
+=item I<--help>
+
+Show list of options
+
+=back
+
+=head1 BUGS
+
+Prototypes must appear on one line - they can't be split across multiple lines.
+Some things are erroneously recognized as functions
+
+=head1 LICENSE
+
+update-proto is licensed under the GNU General Public License L<http://www.gnu.org/licenses/gpl.html>.
+
+=head1 AUTHOR
+
+update-proto was written by Jelmer Vernooij L<jelmer@samba.org>.
+	
+=cut
+
+sub Usage()
+{
+	print "Usage: update-proto.pl [OPTIONS] <HEADER> <C-FILE>...\n";
+	exit 1;
+}
+
+sub Help()
+{
+	print "Usage: update-proto.pl [OPTIONS] <HEADER> <C-FILE>...\n";
+	print "Options:\n";
+	print "	--help			Show this help message\n";
+	print "	--verbose		Write changes made to standard error\n\n";
+	exit 0;
+}
+
+my %new_protos = ();
+
+my $verbose = 0;
+
+GetOptions(
+	'help|h' => \&Help,
+	'v|verbose' => sub { $verbose += 1; }
+) or Usage();
+
+my $header = shift @ARGV;
+
+sub process_file($)
+{
+	my $file = shift;
+	open (IN, "<$file");
+	while (my $line = <IN>) {
+		next if ($line =~ /^\s/);
+		next unless ($line =~ /\(/);
+		next if ($line =~ /^\/|[;]|^#|}|^\s*static/);
+		next unless ($line =~ /^([^(]+)(\s+)(\w+)\s*\((.*)\)\s*{*\s*$/);
+
+		my $name = $3;
+
+		next if ($name eq "main");
+		next unless ($1 =~ /^[\*\w\s]+$/);
+
+		$line =~ s/}\s*$//g;
+		$line =~ s/\n//g;
+		
+		$new_protos{$name} = "$line;";
+	}
+	close(IN);
+}
+
+process_file($_) foreach (@ARGV);
+
+my $added = 0;
+my $modified = 0;
+my $deleted = 0;
+my $kept = 0;
+
+sub insert_new_protos()
+{
+	foreach (keys %new_protos) {
+		print "$new_protos{$_}\n";
+		print STDERR "Inserted prototype for `$_'\n" if ($verbose);
+		$added+=1;
+	}
+	%new_protos = ();
+}
+
+open (HDR, "<$header");
+while (my $line = <HDR>) {
+	# Insert prototypes that weren't in the header before
+	if ($line =~ /^\/\* New prototypes are inserted above this line.*\*\/\s*$/) {
+		insert_new_protos();
+		print "$line\n";
+		next;
+	}
+
+	# Recognize C files that prototypes came from
+	if ($line =~ /^\/\* The following definitions come from (.*) \*\//) {
+		insert_new_protos();
+		process_file($1);
+		print "$line";
+		next;
+	}
+	
+	if ($line =~ /^\s*typedef |^\#|^\s*static/) {
+		print "$line";
+		next;
+	}
+
+	unless ($line =~ /^([^(]+)(\s+)(\w+)\s*\((.*)\)\s*;\s*$/)  {
+		print "$line";
+		next;
+	}
+
+	my $name = $3;
+
+	# This prototype is for a function that was removed
+	unless (defined($new_protos{$name})) {
+		$deleted+=1;
+		print STDERR "Removed prototype for `$name'\n" if ($verbose);
+		next;
+	}
+
+	my $nline = $line;
+	chop($nline);
+
+	if ($new_protos{$name} ne $nline) {
+		$modified+=1;
+		print STDERR "Updated prototype for `$name'\n" if ($verbose);
+		print "$new_protos{$name}\n";
+	} else {
+		$kept+=1;
+		print STDERR "Prototype for `$name' didn't change\n" if ($verbose > 1);
+		print "$line";
+	}
+
+	delete $new_protos{$name};
+}
+close(HDR);
+
+print STDERR "$added added, $modified modified, $deleted deleted, $kept unchanged.\n";
+
+1;