summaryrefslogtreecommitdiffstats
path: root/perl-install/common.pm
blob: 279307e85ce8977952901b2e31e6c18373f06ea5 (plain)
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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
package common;

use diagnostics;
use strict;
use vars qw(@ISA %EXPORT_TAGS @EXPORT_OK $printable_chars $sizeof_int $bitof_int $cancel $SECTORSIZE);

@ISA = qw(Exporter);
%EXPORT_TAGS = (
    common     => [ qw(__ min max sqr sum sign product bool listlength bool2text to_int to_float ikeys member divide is_empty_array_ref is_empty_hash_ref add2hash set_new set_add round round_up round_down first second top uniq translate untranslate warp_text formatAlaTeX) ],
    functional => [ qw(fold_left map_index map_tab_hash mapn mapn_ difference2 before_leaving catch_cdie cdie) ],
    file       => [ qw(dirname basename touch all glob_ cat_ chop_ mode) ],
    system     => [ qw(sync makedev unmakedev psizeof strcpy gettimeofday syscall_ crypt_ getVarsFromSh setVarsInSh) ],
    constant   => [ qw($printable_chars $sizeof_int $bitof_int $SECTORSIZE) ],
);
@EXPORT_OK = map { @$_ } values %EXPORT_TAGS;


#-#####################################################################################
#- Globals
#-#####################################################################################
$printable_chars = "\x20-\x7E";
$sizeof_int      = psizeof("i");
$bitof_int       = $sizeof_int * 8;
$SECTORSIZE      = 512;

#-#####################################################################################
#- Functions
#-#####################################################################################

sub fold_left(&@) {
    my $f = shift;
    local $a = shift;
    foreach $b (@_) { $a = &$f() }
    $a
}

sub _ { my $s = shift @_; sprintf translate($s), @_ }
#-delete $main::{'_'};
sub __ { $_[0] }
sub min { fold_left { $a < $b ? $a : $b } @_ }
sub max { fold_left { $a > $b ? $a : $b } @_ }
sub sum { fold_left { $a + $b } @_ }
sub sqr { $_[0] * $_[0] }
sub sign { $_[0] <=> 0 }
sub product { fold_left { $a * $b } @_ }
sub first { $_[0] }
sub second { $_[1] }
sub top { $_[$#_] }
sub uniq { my %l; @l{@_} = (); keys %l }
sub to_int { $_[0] =~ /(\d*)/; $1 }
sub to_float { $_[0] =~ /(\d*(\.\d*)?)/; $1 }
sub ikeys { my %l = @_; sort { $a <=> $b } keys %l }
sub add2hash { my ($a, $b) = @_; while (my ($k, $v) = each %{$b || {}}) { $a->{$k} ||= $v } }
sub member { my $e = shift; foreach (@_) { $e eq $_ and return 1 } 0 }
sub dirname { @_ == 1 or die "usage: dirname <name>\n"; local $_ = shift; s|[^/]*/*\s*$||; s|(.)/*$|$1|; $_ || '.' }
sub basename { @_ == 1 or die "usage: basename <name>\n"; local $_ = shift; s|/*\s*$||; s|.*/||; $_ }
sub bool { $_[0] ? 1 : 0 }
sub listlength { scalar @_ }
sub bool2text { $_[0] ? "true" : "false" }
sub strcpy { substr($_[0], $_[2] || 0, length $_[1]) = $_[1] }
sub cat_ { local *F; open F, $_[0] or $_[1] ? die "cat of file $_[0] failed: $!\n" : return; my @l = <F>; wantarray ? @l : join '', @l }
sub chop_ { map { my $l = $_; chomp $l; $l } @_ }
sub divide { my $d = int $_[0] / $_[1]; wantarray ? ($d, $_[0] % $_[1]) : $d }
sub round { int ($_[0] + 0.5) }
sub round_up { my ($i, $r) = @_; $i += $r - ($i + $r - 1) % $r - 1; }
sub round_down { my ($i, $r) = @_; $i -= $i % $r; }
sub is_empty_array_ref { my $a = shift; !defined $a || @$a == 0 }
sub is_empty_hash_ref { my $a = shift; !defined $a || keys(%$a) == 0 }
sub difference2 { my %l; @l{@{$_[1]}} = (); grep { !exists $l{$_} } @{$_[0]} }
sub intersection { my (%l, @m); @l{@{shift @_}} = (); foreach (@_) { @m = grep { exists $l{$_} } @$_; %l = (); @l{@m} = (); } keys %l }

sub set_new(@) { my %l; @l{@_} = undef; { list => [ @_ ], hash => \%l } }
sub set_add($@) { my $o = shift; foreach (@_) { exists $o->{hash}{$_} and next; push @{$o->{list}}, $_; $o->{hash}{$_} = undef } }

sub sync { syscall_('sync') }
sub gettimeofday { my $t = pack "LL"; syscall_('gettimeofday', $t, 0) or die "gettimeofday failed: $!\n"; unpack("LL", $t) }

sub remove_spaces { local $_ = shift; s/^ +//; s/ +$//; $_ }
sub mode { my @l = stat $_[0] or die "unable to get mode of file $_[0]: $!\n"; $l[2] }
sub psizeof { length pack $_[0] }

sub touch {
    my $f = shift;
    unless (-e $f) {
	local *F;
	open F, ">$f";
    }
    my $now = time;
    utime $now, $now, $f;
}

sub map_index(&@) {
    my $f = shift;
    my @l;
    local $::i = 0;
    foreach (@_) { push @l, &$f($::i); $::i++; }
    @l;
}

#- pseudo-array-hash :)
sub map_tab_hash(&$@) {
    my ($f, $fields, @tab_hash) = @_;
    my %hash;
    my $key = { map_index {($_, $::i + 1)} @{$fields} };

    for (my $i = 0; $i < @tab_hash; $i += 2) {
	my $h = [$key, @{$tab_hash[$i + 1]}];
	&$f($i, $h) if $f;
	$hash{ $tab_hash[$i] } = $h;
      }
    %hash;
}

sub smapn {
    my $f = shift;
    my $n = shift;
    my @r = ();
    for (my $i = 0; $i < $n; $i++) { push @r, &$f(map { $_->[$i] } @_); }
    @r
}
sub mapn(&@) {
    my $f = shift;
    smapn($f, min(map { scalar @$_ } @_), @_);
}
sub mapn_(&@) {
    my $f = shift;
    smapn($f, max(map { scalar @$_ } @_), @_);
}


sub add_f4before_leaving {
    my ($f, $b, $name) = @_;

    unless ($common::before_leaving::{$name}) {
	no strict 'refs';
	${"common::before_leaving::$name"} = 1;
	${"common::before_leaving::list"} = 1;
    }
    local *N = *{$common::before_leaving::{$name}};
    my $list = *common::before_leaving::list;
    $list->{$b}{$name} = $f;
    *N = sub {
	my $f = $list->{$_[0]}{$name} or die '';
	$name eq 'DESTROY' and delete $list->{$_[0]};
	goto $f;
    } unless defined &{*N};

}

#- ! the functions are not called in the order wanted, in case of multiple before_leaving :(
sub before_leaving(&) {
    my ($f) = @_;
    my $b = bless {}, 'common::before_leaving';
    add_f4before_leaving($f, $b, 'DESTROY');
    $b;
}

sub catch_cdie(&&) {
    my ($f, $catch) = @_;

    local @common::cdie_catches;
    unshift @common::cdie_catches, $catch;
    &$f();
}

sub cdie {
    $@ = join '', @_;
    foreach (@common::cdie_catches) {
	&{$_}(@_) and return;
    }
    die join '', @_;
}

sub all {
    my $d = shift;

    local *F;
    opendir F, $d or die "all: can't open dir $d: $!\n";
    grep { $_ ne '.' && $_ ne '..' } readdir F;
}

sub glob_ {
    my ($d, $f) = ($_[0] =~ /\*/) ? (dirname($_[0]), basename($_[0])) : ($_[0], '*');

    $d =~ /\*/ and die "glob_: wildcard in directory not handled ($_[0])\n";
    ($f = quotemeta $f) =~ s/\\\*/.*/g;

    $d =~ m|/$| or $d .= '/';
    map { $d eq './' ? $_ : "$d$_" } grep { /$f/ } all($d);
}


sub syscall_ {
    my $f = shift;

    require 'syscall.ph';
    syscall(&{$common::{"SYS_$f"}}, @_) == 0;
}


sub crypt_ {
    local $_ = (gettimeofday())[1] % 0x40;
    tr [\0-\x3f] [0-9a-zA-Z./];
    crypt($_[0], $_)
}

sub makedev { ($_[0] << 8) | $_[1] }
sub unmakedev { $_[0] >> 8, $_[0] & 0xff }

sub translate {
    my ($s) = @_;
    my ($lang) = substr($ENV{LC_ALL} || $ENV{LANGUAGE} || $ENV{LC_MESSAGES} || $ENV{LANG} || '', 0, 2);
    unless (defined $po::I18N::{$lang}) {
	local $@;
	local $SIG{__DIE__} = 'none';
	eval { require "po/$lang.pm"; };
    }
    $po::I18N::{$lang} or return $s;
    my $l = *{$po::I18N::{$lang}};
    $l->{$s} || $s;
}

sub untranslate($@) {
    my $s = shift;
    foreach (@_) { translate($_) eq $s and return $_ }
    die "untranslate failed";
}

sub warp_text($;$) {
    my ($text, $width) = @_;
    $width ||= 80;

    my @l;
    foreach (split "\n", $text) {
	my $t = '';
	foreach (split /\s+/, $_) {
	    if (length "$t $_" > $width) {
		push @l, $t;
		$t = $_;
	    } else {
		$t = "$t $_";
	    }
	}
	push @l, $t;
    }
    @l;
}

sub formatAlaTeX($) {
    my ($t, $tmp);
    foreach (split "\n", $_[0]) {
	if (/^$/) {
	    $t .= ($t && "\n") . $tmp;
	    $tmp = '';
	} else {
	    $tmp = ($tmp && "$tmp ") . $_;
	}
    }
    $t . ($t && $tmp && "\n") . $tmp;
}

sub getVarsFromSh($) {
    my %l;
    local *F;
    open F, $_[0] or return;
    foreach (<F>) {
	my ($v, $val, $val2) =
	  /^\s*			# leading space
	   (\w+) =		# variable
	   (
   	       "([^"]*)"	# double-quoted text
   	     | '([^']*)'	# single-quoted text
   	     | [^'"\s]+		# normal text
           )
           \s*$			# end of line
          /x or next;
	$l{$v} = $val2 || $val;
    }
    %l;
}

sub setVarsInSh {
    my ($file, $l, @fields) = @_;
    @fields = keys %$l unless @fields;

    local *F;
    open F, "> $_[0]" or die "cannot create config file $file";
    $l->{$_} and print F "$_=$l->{$_}\n" foreach @fields;
}

sub best_match {
    my ($str, @lis) = @_;
    my @words = split /\W+/, $str;
    my ($max, $res) = 0;

    foreach (@lis) {
	my $count = 0;
	foreach my $i (@words) {
	    $count++ if /$i/i;
	}
	$max = $count, $res = $_ if $count >= $max;
    }
    $res;
}

sub bestMatchSentence {

    my $best = -1;
    my $bestSentence;
    my @s = split /\W+/, shift;
    foreach (@_) {
	my $count = 0;
	foreach my $e (@s) {
	    $count++ if /$e/i;
	}
	$best = $count, $bestSentence = $_ if $count > $best;
    }
    $bestSentence;
}

# count the number of character that match
sub bestMatchSentence2 {

    my $best = -1;
    my $bestSentence;
    my @s = split /\W+/, shift;
    foreach (@_) {
	my $count = 0;
	foreach my $e (@s) {
	    $count+= length ($e) if /$e/i;
	}
	$best = $count, $bestSentence = $_ if $count > $best;
    }
    $bestSentence;
}


#-######################################################################################
#- Wonderful perl :(
#-######################################################################################
1; #