1#!/usr/bin/perl -w 2use strict; 3use File::Temp qw/ tempdir /; 4my $prog = "reducer"; 5 6die "$prog <code file> <error string> [optional command]\n" if ($#ARGV < 0); 7my $file = shift @ARGV; 8die "$prog: [error] cannot read file $file\n" if (! -r $file); 9 10my $magic = shift @ARGV; 11die "$prog: [error] no error string specified\n" if (! defined $magic); 12 13# Create a backup of the file. 14my $dir = tempdir( CLEANUP => 1 ); 15print "$prog: created temporary directory '$dir'\n"; 16my $srcFile = "$dir/$file"; 17`cp $file $srcFile`; 18 19# Create the script. 20my $scriptFile = "$dir/script"; 21open(OUT, ">$scriptFile") or die "$prog: cannot create '$scriptFile'\n"; 22my $reduceOut = "$dir/reduceOut"; 23 24my $command; 25if (scalar(@ARGV) > 0) { $command = \@ARGV; } 26else { 27 my $compiler = "clang"; 28 $command = [$compiler, "-fsyntax-only", "-Wfatal-errors", "-Wno-deprecated-declarations", "-Wimplicit-function-declaration"]; 29} 30push @$command, $srcFile; 31my $commandStr = "@$command"; 32 33print OUT <<ENDTEXT; 34#!/usr/bin/perl -w 35use strict; 36my \$BAD = 1; 37my \$GOOD = 0; 38`rm -f $reduceOut`; 39my \$command = "$commandStr > $reduceOut 2>&1"; 40system(\$command); 41open(IN, "$reduceOut") or exit(\$BAD); 42my \$found = 0; 43while(<IN>) { 44 if (/$magic/) { exit \$GOOD; } 45} 46exit \$BAD; 47ENDTEXT 48close(OUT); 49`chmod +x $scriptFile`; 50 51print "$prog: starting reduction\n"; 52sub multidelta($) { 53 my ($level) = @_; 54 system("multidelta -level=$level $scriptFile $srcFile"); 55} 56 57for (my $i = 1 ; $i <= 5; $i++) { 58 foreach my $level (0,0,1,1,2,2,10) { 59 multidelta($level); 60 } 61} 62 63# Copy the final file. 64`cp $srcFile $file.reduced`; 65print "$prog: generated '$file.reduced"; 66