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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261#!/usr/bin/env perl# SPDX-License-Identifier: GPL-2.0## Clean a patch file -- or directory of patch files -- of stealth whitespace.# WARNING: this can be a highly destructive operation. Use with caution.#
use warnings;use bytes;use File::Basename;
# Default options$max_width = 79;
# Clean up space-tab sequences, either by removing spaces or# replacing them with tabs.sub clean_space_tabs($){ no bytes; # Tab alignment depends on characters
my($li) = @_; my($lo) = ''; my $pos = 0; my $nsp = 0; my($i, $c);
for ($i = 0; $i < length($li); $i++) { $c = substr($li, $i, 1); if ($c eq "\t") { my $npos = ($pos+$nsp+8) & ~7; my $ntab = ($npos >> 3) - ($pos >> 3); $lo .= "\t" x $ntab; $pos = $npos; $nsp = 0; } elsif ($c eq "\n" || $c eq "\r") { $lo .= " " x $nsp; $pos += $nsp; $nsp = 0; $lo .= $c; $pos = 0; } elsif ($c eq " ") { $nsp++; } else { $lo .= " " x $nsp; $pos += $nsp; $nsp = 0; $lo .= $c; $pos++; } } $lo .= " " x $nsp; return $lo;}
# Compute the visual width of a stringsub strwidth($) { no bytes; # Tab alignment depends on characters
my($li) = @_; my($c, $i); my $pos = 0; my $mlen = 0;
for ($i = 0; $i < length($li); $i++) { $c = substr($li,$i,1); if ($c eq "\t") { $pos = ($pos+8) & ~7; } elsif ($c eq "\n") { $mlen = $pos if ($pos > $mlen); $pos = 0; } else { $pos++; } }
$mlen = $pos if ($pos > $mlen); return $mlen;}
$name = basename($0);
@files = ();
while (defined($a = shift(@ARGV))) { if ($a =~ /^-/) { if ($a eq '-width' || $a eq '-w') { $max_width = shift(@ARGV)+0; } else { print STDERR "Usage: $name [-width #] files...\n"; exit 1; } } else { push(@files, $a); }}
foreach $f ( @files ) { print STDERR "$name: $f\n";
if (! -f $f) { print STDERR "$f: not a file\n"; next; }
if (!open(FILE, '+<', $f)) { print STDERR "$name: Cannot open file: $f: $!\n"; next; }
binmode FILE;
# First, verify that it is not a binary file; consider any file # with a zero byte to be a binary file. Is there any better, or # additional, heuristic that should be applied? $is_binary = 0;
while (read(FILE, $data, 65536) > 0) { if ($data =~ /\0/) { $is_binary = 1; last; } }
if ($is_binary) { print STDERR "$name: $f: binary file\n"; next; }
seek(FILE, 0, 0);
$in_bytes = 0; $out_bytes = 0; $lineno = 0;
@lines = ();
$in_hunk = 0; $err = 0;
while ( defined($line = <FILE>) ) { $lineno++; $in_bytes += length($line);
if (!$in_hunk) { if ($line =~ /^\@\@\s+\-([0-9]+),([0-9]+)\s+\+([0-9]+),([0-9]+)\s\@\@/) { $minus_lines = $2; $plus_lines = $4; if ($minus_lines || $plus_lines) { $in_hunk = 1; @hunk_lines = ($line); } } else { push(@lines, $line); $out_bytes += length($line); } } else { # We're in a hunk
if ($line =~ /^\+/) { $plus_lines--;
$text = substr($line, 1); $text =~ s/[ \t\r]*$//; # Remove trailing spaces $text = clean_space_tabs($text);
$l_width = strwidth($text); if ($max_width && $l_width > $max_width) { print STDERR "$f:$lineno: adds line exceeds $max_width ", "characters ($l_width)\n"; }
push(@hunk_lines, '+'.$text); } elsif ($line =~ /^\-/) { $minus_lines--; push(@hunk_lines, $line); } elsif ($line =~ /^ /) { $plus_lines--; $minus_lines--; push(@hunk_lines, $line); } else { print STDERR "$name: $f: malformed patch\n"; $err = 1; last; }
if ($plus_lines < 0 || $minus_lines < 0) { print STDERR "$name: $f: malformed patch\n"; $err = 1; last; } elsif ($plus_lines == 0 && $minus_lines == 0) { # End of a hunk. Process this hunk. my $i; my $l; my @h = (); my $adj = 0; my $done = 0;
for ($i = scalar(@hunk_lines)-1; $i > 0; $i--) { $l = $hunk_lines[$i]; if (!$done && $l eq "+\n") { $adj++; # Skip this line } elsif ($l =~ /^[ +]/) { $done = 1; unshift(@h, $l); } else { unshift(@h, $l); } }
$l = $hunk_lines[0]; # Hunk header undef @hunk_lines; # Free memory
if ($adj) { die unless ($l =~ /^\@\@\s+\-([0-9]+),([0-9]+)\s+\+([0-9]+),([0-9]+)\s\@\@(.*)$/); my $mstart = $1; my $mlin = $2; my $pstart = $3; my $plin = $4; my $tail = $5; # doesn't include the final newline
$l = sprintf("@@ -%d,%d +%d,%d @@%s\n", $mstart, $mlin, $pstart, $plin-$adj, $tail); } unshift(@h, $l);
# Transfer to the output array foreach $l (@h) { $out_bytes += length($l); push(@lines, $l); }
$in_hunk = 0; } } }
if ($in_hunk) { print STDERR "$name: $f: malformed patch\n"; $err = 1; }
if (!$err) { if ($in_bytes != $out_bytes) { # Only write to the file if changed seek(FILE, 0, 0); print FILE @lines;
if ( !defined($where = tell(FILE)) || !truncate(FILE, $where) ) { die "$name: Failed to truncate modified file: $f: $!\n"; } } }
close(FILE);}