Werner's Miscellanea
Sign in or create your account | Project List | Help
Werner's Miscellanea Git Source Tree
Root/
| 1 | #!/usr/bin/perl |
| 2 | |
| 3 | |
| 4 | sub usage |
| 5 | { |
| 6 | print STDERR "usage: $0 [-v] pattern [file ...]\n"; |
| 7 | exit(1); |
| 8 | } |
| 9 | |
| 10 | |
| 11 | if ($ARGV[0] eq "-v") { |
| 12 | $invert = 1; |
| 13 | shift @ARGV; |
| 14 | } |
| 15 | &usage if $ARGV[0] =~ /^-/; |
| 16 | |
| 17 | $pattern = shift @ARGV; |
| 18 | &usage unless defined $pattern; |
| 19 | |
| 20 | |
| 21 | sub flush |
| 22 | { |
| 23 | my $mismatch = !($chunk =~ /$pattern/m); |
| 24 | |
| 25 | if ($mismatch == $invert) { |
| 26 | print $head; |
| 27 | print $chunk; |
| 28 | } |
| 29 | undef $head; |
| 30 | undef $chunk; |
| 31 | } |
| 32 | |
| 33 | |
| 34 | $HEAD = 0; |
| 35 | $CHUNK = 1; |
| 36 | $TAIL = 2; |
| 37 | |
| 38 | |
| 39 | $state = $HEAD; |
| 40 | while (<>) { |
| 41 | $state = $HEAD if /^diff /; |
| 42 | if (/^@@ -\d+,(\d+) \+\d+,(\d+)/) { |
| 43 | $state = $CHUNK; |
| 44 | ($in, $out) = ($1, $2); |
| 45 | $chunk = $_; |
| 46 | next; |
| 47 | } |
| 48 | if ($state == $HEAD) { |
| 49 | $head .= $_; |
| 50 | next; |
| 51 | } |
| 52 | next if $state == $TAIL; |
| 53 | $in-- if /^-/; |
| 54 | $out-- if /^\+/; |
| 55 | ($in--, $out--) if /^\s/; |
| 56 | die "in $in out $out" if $in < 0 || $out < 0; |
| 57 | if ($in+$out == 0) { |
| 58 | $state = $TAIL; |
| 59 | &flush; |
| 60 | } else { |
| 61 | $chunk .= $_; |
| 62 | } |
| 63 | } |
| 64 | &flush; |
| 65 |
Branches:
master
