Quellcode-Bibliothek cleanpatch Sprache: unbekannt

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#!/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 string
sub 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);
}

Quellcode-Bibliothek cleanpatch Sprache: unbekannt

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