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[/] [test_project/] [trunk/] [linux_sd_driver/] [scripts/] [cleanpatch] - Blame information for rev 62

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#!/usr/bin/perl -w
#
# Clean a patch file -- or directory of patch files -- of stealth whitespace.
# WARNING: this can be a highly destructive operation.  Use with caution.
#
 
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 = ) ) {
        $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);
}

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Subversion Repositories test_project

[/] [test_project/] [trunk/] [linux_sd_driver/] [scripts/] [cleanpatch] - Blame information for rev 62

Line No.	Rev	Author	Line
1	62	marcus.erl	`#!/usr/bin/perl -w`
2			`#`
3			`# Clean a patch file -- or directory of patch files -- of stealth whitespace.`
4			`# WARNING: this can be a highly destructive operation. Use with caution.`
5			`#`
6
7			`use bytes;`
8			`use File::Basename;`
9
10			`# Default options`
11			`$max_width = 79;`
12
13			`# Clean up space-tab sequences, either by removing spaces or`
14			`# replacing them with tabs.`
15			`sub clean_space_tabs($)`
16			`{`
17			`no bytes; # Tab alignment depends on characters`
18
19			`my($li) = @_;`
20			`my($lo) = '';`
21			`my $pos = 0;`
22			`my $nsp = 0;`
23			`my($i, $c);`
24
25			`for ($i = 0; $i < length($li); $i++) {`
26			`$c = substr($li, $i, 1);`
27			`if ($c eq "\t") {`
28			`my $npos = ($pos+$nsp+8) & ~7;`
29			`my $ntab = ($npos >> 3) - ($pos >> 3);`
30			`$lo .= "\t" x $ntab;`
31			`$pos = $npos;`
32			`$nsp = 0;`
33			`} elsif ($c eq "\n" \|\| $c eq "\r") {`
34			`$lo .= " " x $nsp;`
35			`$pos += $nsp;`
36			`$nsp = 0;`
37			`$lo .= $c;`
38			`$pos = 0;`
39			`} elsif ($c eq " ") {`
40			`$nsp++;`
41			`} else {`
42			`$lo .= " " x $nsp;`
43			`$pos += $nsp;`
44			`$nsp = 0;`
45			`$lo .= $c;`
46			`$pos++;`
47			`}`
48			`}`
49			`$lo .= " " x $nsp;`
50			`return $lo;`
51			`}`
52
53			`# Compute the visual width of a string`
54			`sub strwidth($) {`
55			`no bytes; # Tab alignment depends on characters`
56
57			`my($li) = @_;`
58			`my($c, $i);`
59			`my $pos = 0;`
60			`my $mlen = 0;`
61
62			`for ($i = 0; $i < length($li); $i++) {`
63			`$c = substr($li,$i,1);`
64			`if ($c eq "\t") {`
65			`$pos = ($pos+8) & ~7;`
66			`} elsif ($c eq "\n") {`
67			`$mlen = $pos if ($pos > $mlen);`
68			`$pos = 0;`
69			`} else {`
70			`$pos++;`
71			`}`
72			`}`
73
74			`$mlen = $pos if ($pos > $mlen);`
75			`return $mlen;`
76			`}`
77
78			`$name = basename($0);`
79
80			`@files = ();`
81
82			`while (defined($a = shift(@ARGV))) {`
83			`if ($a =~ /^-/) {`
84			`if ($a eq '-width' \|\| $a eq '-w') {`
85			`$max_width = shift(@ARGV)+0;`
86			`} else {`
87			`print STDERR "Usage: $name [-width #] files...\n";`
88			`exit 1;`
89			`}`
90			`} else {`
91			`push(@files, $a);`
92			`}`
93			`}`
94
95			`foreach $f ( @files ) {`
96			`print STDERR "$name: $f\n";`
97
98			`if (! -f $f) {`
99			`print STDERR "$f: not a file\n";`
100			`next;`
101			`}`
102
103			`if (!open(FILE, '+<', $f)) {`
104			`print STDERR "$name: Cannot open file: $f: $!\n";`
105			`next;`
106			`}`
107
108			`binmode FILE;`
109
110			`# First, verify that it is not a binary file; consider any file`
111			`# with a zero byte to be a binary file. Is there any better, or`
112			`# additional, heuristic that should be applied?`
113			`$is_binary = 0;`
114
115			`while (read(FILE, $data, 65536) > 0) {`
116			`if ($data =~ /\0/) {`
117			`$is_binary = 1;`
118			`last;`
119			`}`
120			`}`
121
122			`if ($is_binary) {`
123			`print STDERR "$name: $f: binary file\n";`
124			`next;`
125			`}`
126
127			`seek(FILE, 0, 0);`
128
129			`$in_bytes = 0;`
130			`$out_bytes = 0;`
131			`$lineno = 0;`
132
133			`@lines = ();`
134
135			`$in_hunk = 0;`
136			`$err = 0;`
137
138			`while ( defined($line = ) ) {`
139			`$lineno++;`
140			`$in_bytes += length($line);`
141
142			`if (!$in_hunk) {`
143			`if ($line =~`
144			`/^\@\@\s+\-([0-9]+),([0-9]+)\s+\+([0-9]+),([0-9]+)\s\@\@/) {`
145			`$minus_lines = $2;`
146			`$plus_lines = $4;`
147			`if ($minus_lines \|\| $plus_lines) {`
148			`$in_hunk = 1;`
149			`@hunk_lines = ($line);`
150			`}`
151			`} else {`
152			`push(@lines, $line);`
153			`$out_bytes += length($line);`
154			`}`
155			`} else {`
156			`# We're in a hunk`
157
158			`if ($line =~ /^\+/) {`
159			`$plus_lines--;`
160
161			`$text = substr($line, 1);`
162			`$text =~ s/[ \t\r]*$//; # Remove trailing spaces`
163			`$text = clean_space_tabs($text);`
164
165			`$l_width = strwidth($text);`
166			`if ($max_width && $l_width > $max_width) {`
167			`print STDERR`
168			`"$f:$lineno: adds line exceeds $max_width ",`
169			`"characters ($l_width)\n";`
170			`}`
171
172			`push(@hunk_lines, '+'.$text);`
173			`} elsif ($line =~ /^\-/) {`
174			`$minus_lines--;`
175			`push(@hunk_lines, $line);`
176			`} elsif ($line =~ /^ /) {`
177			`$plus_lines--;`
178			`$minus_lines--;`
179			`push(@hunk_lines, $line);`
180			`} else {`
181			`print STDERR "$name: $f: malformed patch\n";`
182			`$err = 1;`
183			`last;`
184			`}`
185
186			`if ($plus_lines < 0 \|\| $minus_lines < 0) {`
187			`print STDERR "$name: $f: malformed patch\n";`
188			`$err = 1;`
189			`last;`
190			`} elsif ($plus_lines == 0 && $minus_lines == 0) {`
191			`# End of a hunk. Process this hunk.`
192			`my $i;`
193			`my $l;`
194			`my @h = ();`
195			`my $adj = 0;`
196			`my $done = 0;`
197
198			`for ($i = scalar(@hunk_lines)-1; $i > 0; $i--) {`
199			`$l = $hunk_lines[$i];`
200			`if (!$done && $l eq "+\n") {`
201			`$adj++; # Skip this line`
202			`} elsif ($l =~ /^[ +]/) {`
203			`$done = 1;`
204			`unshift(@h, $l);`
205			`} else {`
206			`unshift(@h, $l);`
207			`}`
208			`}`
209
210			`$l = $hunk_lines[0]; # Hunk header`
211			`undef @hunk_lines; # Free memory`
212
213			`if ($adj) {`
214			`die unless`
215			`($l =~ /^\@\@\s+\-([0-9]+),([0-9]+)\s+\+([0-9]+),([0-9]+)\s\@\@(.*)$/);`
216			`my $mstart = $1;`
217			`my $mlin = $2;`
218			`my $pstart = $3;`
219			`my $plin = $4;`
220			`my $tail = $5; # doesn't include the final newline`
221
222			`$l = sprintf("@@ -%d,%d +%d,%d @@%s\n",`
223			`$mstart, $mlin, $pstart, $plin-$adj,`
224			`$tail);`
225			`}`
226			`unshift(@h, $l);`
227
228			`# Transfer to the output array`
229			`foreach $l (@h) {`
230			`$out_bytes += length($l);`
231			`push(@lines, $l);`
232			`}`
233
234			`$in_hunk = 0;`
235			`}`
236			`}`
237			`}`
238
239			`if ($in_hunk) {`
240			`print STDERR "$name: $f: malformed patch\n";`
241			`$err = 1;`
242			`}`
243
244			`if (!$err) {`
245			`if ($in_bytes != $out_bytes) {`
246			`# Only write to the file if changed`
247			`seek(FILE, 0, 0);`
248			`print FILE @lines;`
249
250			`if ( !defined($where = tell(FILE)) \|\|`
251			`!truncate(FILE, $where) ) {`
252			`die "$name: Failed to truncate modified file: $f: $!\n";`
253			`}`
254			`}`
255			`}`
256
257			`close(FILE);`
258			`}`