1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
#!/usr/bin/perl -w
use strict;
use vars qw($Needs_Write $Verbose @Changed $TAP);
use File::Compare;
use Symbol;
use Text::Wrap;
# Common functions needed by the regen scripts
$Needs_Write = $^O eq 'cygwin' || $^O eq 'os2' || $^O eq 'MSWin32';
$Verbose = 0;
@ARGV = grep { not($_ eq '-q' and $Verbose = -1) }
grep { not($_ eq '--tap' and $TAP = 1) }
grep { not($_ eq '-v' and $Verbose = 1) } @ARGV;
END {
print STDOUT "Changed: @Changed\n" if @Changed;
}
sub safer_unlink {
my @names = @_;
my $cnt = 0;
my $name;
foreach $name (@names) {
next unless -e $name;
chmod 0777, $name if $Needs_Write;
( CORE::unlink($name) and ++$cnt
or warn "Couldn't unlink $name: $!\n" );
}
return $cnt;
}
sub safer_rename_silent {
my ($from, $to) = @_;
# Some dosish systems can't rename over an existing file:
safer_unlink $to;
chmod 0600, $from if $Needs_Write;
rename $from, $to;
}
sub rename_if_different {
my ($from, $to) = @_;
if ($TAP) {
my $not = compare($from, $to) ? 'not ' : '';
print STDOUT $not . "ok - $0 $to\n";
safer_unlink($from);
return;
}
if (compare($from, $to) == 0) {
warn "no changes between '$from' & '$to'\n" if $Verbose > 0;
safer_unlink($from);
return;
}
warn "changed '$from' to '$to'\n" if $Verbose > 0;
push @Changed, $to unless $Verbose < 0;
safer_rename_silent($from, $to) or die "renaming $from to $to: $!";
}
# Saf*er*, but not totally safe. And assumes always open for output.
sub safer_open {
my $name = shift;
if (-f $name) {
unlink $name or die "$name exists but can't unlink: $!";
}
my $fh = gensym;
open $fh, ">$name" or die "Can't create $name: $!";
*{$fh}->{name} = $name;
binmode $fh;
$fh;
}
sub safer_close {
my $fh = shift;
close $fh or die 'Error closing ' . *{$fh}->{name} . ": $!";
}
sub read_only_top {
my %args = @_;
die "Missing language argument" unless defined $args{lang};
die "Unknown language argument '$args{lang}'"
unless $args{lang} eq 'Perl' or $args{lang} eq 'C';
my $style = $args{style} ? " $args{style} " : ' ';
my $raw = "-*- buffer-read-only: t -*-\n";
if ($args{file}) {
$raw .= "\n $args{file}\n";
}
if ($args{copyright}) {
local $" = ', ';
local $Text::Wrap::columns = 75;
$raw .= wrap(' ', ' ', <<"EOM") . "\n";
Copyright (C) @{$args{copyright}} by\0Larry\0Wall\0and\0others
You may distribute under the terms of either the GNU General Public
License or the Artistic License, as specified in the README file.
EOM
}
$raw .= "!!!!!!! DO NOT EDIT THIS FILE !!!!!!!\n";
if ($args{by}) {
$raw .= "This file is built by $args{by}";
if ($args{from}) {
my @from = ref $args{from} eq 'ARRAY' ? @{$args{from}} : $args{from};
my $last = pop @from;
if (@from) {
$raw .= ' from ' . join (', ', @from) . " and $last";
} else {
$raw .= " from $last";
}
}
$raw .= ".\n";
}
$raw .= "Any changes made here will be lost!\n";
$raw .= $args{final} if $args{final};
local $Text::Wrap::columns = 78;
my $cooked = $args{lang} eq 'Perl'
? wrap('# ', '# ', $raw) . "\n" : wrap('/* ', $style, $raw) . " */\n\n";
$cooked =~ tr/\0/ /; # Don't break Larry's name etc
$cooked =~ s/ +$//mg; # Remove all trailing spaces
return $cooked;
}
1;
|
