| 1 | #!/usr/bin/perl |
| 2 | |
| 3 | BEGIN { |
| 4 | push @INC, './lib'; |
| 5 | } |
| 6 | use strict ; |
| 7 | |
| 8 | sub DEFAULT_ON () { 1 } |
| 9 | sub DEFAULT_OFF () { 2 } |
| 10 | |
| 11 | my $tree = { |
| 12 | |
| 13 | 'all' => { |
| 14 | 'io' => { 'pipe' => DEFAULT_OFF, |
| 15 | 'unopened' => DEFAULT_OFF, |
| 16 | 'closed' => DEFAULT_OFF, |
| 17 | 'newline' => DEFAULT_OFF, |
| 18 | 'exec' => DEFAULT_OFF, |
| 19 | }, |
| 20 | 'syntax' => { 'ambiguous' => DEFAULT_OFF, |
| 21 | 'semicolon' => DEFAULT_OFF, |
| 22 | 'precedence' => DEFAULT_OFF, |
| 23 | 'bareword' => DEFAULT_OFF, |
| 24 | 'reserved' => DEFAULT_OFF, |
| 25 | 'digit' => DEFAULT_OFF, |
| 26 | 'parenthesis' => DEFAULT_OFF, |
| 27 | 'deprecated' => DEFAULT_OFF, |
| 28 | 'printf' => DEFAULT_OFF, |
| 29 | 'prototype' => DEFAULT_OFF, |
| 30 | 'qw' => DEFAULT_OFF, |
| 31 | }, |
| 32 | 'severe' => { 'inplace' => DEFAULT_ON, |
| 33 | 'internal' => DEFAULT_ON, |
| 34 | 'debugging' => DEFAULT_ON, |
| 35 | 'malloc' => DEFAULT_ON, |
| 36 | }, |
| 37 | 'void' => DEFAULT_OFF, |
| 38 | 'recursion' => DEFAULT_OFF, |
| 39 | 'redefine' => DEFAULT_OFF, |
| 40 | 'numeric' => DEFAULT_OFF, |
| 41 | 'uninitialized' => DEFAULT_OFF, |
| 42 | 'once' => DEFAULT_OFF, |
| 43 | 'misc' => DEFAULT_OFF, |
| 44 | 'regexp' => DEFAULT_OFF, |
| 45 | 'glob' => DEFAULT_OFF, |
| 46 | 'y2k' => DEFAULT_OFF, |
| 47 | 'chmod' => DEFAULT_OFF, |
| 48 | 'umask' => DEFAULT_OFF, |
| 49 | 'untie' => DEFAULT_OFF, |
| 50 | 'substr' => DEFAULT_OFF, |
| 51 | 'taint' => DEFAULT_OFF, |
| 52 | 'signal' => DEFAULT_OFF, |
| 53 | 'closure' => DEFAULT_OFF, |
| 54 | 'overflow' => DEFAULT_OFF, |
| 55 | 'portable' => DEFAULT_OFF, |
| 56 | 'utf8' => DEFAULT_OFF, |
| 57 | 'exiting' => DEFAULT_OFF, |
| 58 | 'pack' => DEFAULT_OFF, |
| 59 | 'unpack' => DEFAULT_OFF, |
| 60 | #'default' => DEFAULT_ON, |
| 61 | } |
| 62 | } ; |
| 63 | |
| 64 | |
| 65 | ########################################################################### |
| 66 | sub tab { |
| 67 | my($l, $t) = @_; |
| 68 | $t .= "\t" x ($l - (length($t) + 1) / 8); |
| 69 | $t; |
| 70 | } |
| 71 | |
| 72 | ########################################################################### |
| 73 | |
| 74 | my %list ; |
| 75 | my %Value ; |
| 76 | my $index ; |
| 77 | |
| 78 | sub walk |
| 79 | { |
| 80 | my $tre = shift ; |
| 81 | my @list = () ; |
| 82 | my ($k, $v) ; |
| 83 | |
| 84 | foreach $k (sort keys %$tre) { |
| 85 | $v = $tre->{$k}; |
| 86 | die "duplicate key $k\n" if defined $list{$k} ; |
| 87 | $Value{$index} = uc $k ; |
| 88 | push @{ $list{$k} }, $index ++ ; |
| 89 | if (ref $v) |
| 90 | { push (@{ $list{$k} }, walk ($v)) } |
| 91 | push @list, @{ $list{$k} } ; |
| 92 | } |
| 93 | |
| 94 | return @list ; |
| 95 | } |
| 96 | |
| 97 | ########################################################################### |
| 98 | |
| 99 | sub mkRange |
| 100 | { |
| 101 | my @a = @_ ; |
| 102 | my @out = @a ; |
| 103 | my $i ; |
| 104 | |
| 105 | |
| 106 | for ($i = 1 ; $i < @a; ++ $i) { |
| 107 | $out[$i] = ".." |
| 108 | if $a[$i] == $a[$i - 1] + 1 && $a[$i] + 1 == $a[$i + 1] ; |
| 109 | } |
| 110 | |
| 111 | my $out = join(",",@out); |
| 112 | |
| 113 | $out =~ s/,(\.\.,)+/../g ; |
| 114 | return $out; |
| 115 | } |
| 116 | |
| 117 | ########################################################################### |
| 118 | sub printTree |
| 119 | { |
| 120 | my $tre = shift ; |
| 121 | my $prefix = shift ; |
| 122 | my $indent = shift ; |
| 123 | my ($k, $v) ; |
| 124 | |
| 125 | my $max = (sort {$a <=> $b} map { length $_ } keys %$tre)[-1] ; |
| 126 | |
| 127 | $prefix .= " " x $indent ; |
| 128 | foreach $k (sort keys %$tre) { |
| 129 | $v = $tre->{$k}; |
| 130 | print $prefix . "|\n" ; |
| 131 | print $prefix . "+- $k" ; |
| 132 | if (ref $v) |
| 133 | { |
| 134 | print " " . "-" x ($max - length $k ) . "+\n" ; |
| 135 | printTree ($v, $prefix . "|" , $max + $indent - 1) |
| 136 | } |
| 137 | else |
| 138 | { print "\n" } |
| 139 | } |
| 140 | |
| 141 | } |
| 142 | |
| 143 | ########################################################################### |
| 144 | |
| 145 | sub mkHex |
| 146 | { |
| 147 | my ($max, @a) = @_ ; |
| 148 | my $mask = "\x00" x $max ; |
| 149 | my $string = "" ; |
| 150 | |
| 151 | foreach (@a) { |
| 152 | vec($mask, $_, 1) = 1 ; |
| 153 | } |
| 154 | |
| 155 | #$string = unpack("H$max", $mask) ; |
| 156 | #$string =~ s/(..)/\x$1/g; |
| 157 | foreach (unpack("C*", $mask)) { |
| 158 | $string .= '\x' . sprintf("%2.2x", $_) ; |
| 159 | } |
| 160 | return $string ; |
| 161 | } |
| 162 | |
| 163 | ########################################################################### |
| 164 | |
| 165 | if (@ARGV && $ARGV[0] eq "tree") |
| 166 | { |
| 167 | #print " all -+\n" ; |
| 168 | printTree($tree, " ", 4) ; |
| 169 | exit ; |
| 170 | } |
| 171 | |
| 172 | #unlink "warnings.h"; |
| 173 | #unlink "lib/warnings.pm"; |
| 174 | open(WARN, ">warnings.h") || die "Can't create warnings.h: $!\n"; |
| 175 | open(PM, ">lib/warnings.pm") || die "Can't create lib/warnings.pm: $!\n"; |
| 176 | |
| 177 | print WARN <<'EOM' ; |
| 178 | /* !!!!!!! DO NOT EDIT THIS FILE !!!!!!! |
| 179 | This file is built by warnings.pl |
| 180 | Any changes made here will be lost! |
| 181 | */ |
| 182 | |
| 183 | |
| 184 | #define Off(x) ((x) / 8) |
| 185 | #define Bit(x) (1 << ((x) % 8)) |
| 186 | #define IsSet(a, x) ((a)[Off(x)] & Bit(x)) |
| 187 | |
| 188 | |
| 189 | #define G_WARN_OFF 0 /* $^W == 0 */ |
| 190 | #define G_WARN_ON 1 /* -w flag and $^W != 0 */ |
| 191 | #define G_WARN_ALL_ON 2 /* -W flag */ |
| 192 | #define G_WARN_ALL_OFF 4 /* -X flag */ |
| 193 | #define G_WARN_ONCE 8 /* set if 'once' ever enabled */ |
| 194 | #define G_WARN_ALL_MASK (G_WARN_ALL_ON|G_WARN_ALL_OFF) |
| 195 | |
| 196 | #define pWARN_STD Nullsv |
| 197 | #define pWARN_ALL (Nullsv+1) /* use warnings 'all' */ |
| 198 | #define pWARN_NONE (Nullsv+2) /* no warnings 'all' */ |
| 199 | |
| 200 | #define specialWARN(x) ((x) == pWARN_STD || (x) == pWARN_ALL || \ |
| 201 | (x) == pWARN_NONE) |
| 202 | EOM |
| 203 | |
| 204 | my $offset = 0 ; |
| 205 | |
| 206 | $index = $offset ; |
| 207 | #@{ $list{"all"} } = walk ($tree) ; |
| 208 | walk ($tree) ; |
| 209 | |
| 210 | |
| 211 | $index *= 2 ; |
| 212 | my $warn_size = int($index / 8) + ($index % 8 != 0) ; |
| 213 | |
| 214 | my $k ; |
| 215 | foreach $k (sort { $a <=> $b } keys %Value) { |
| 216 | print WARN tab(5, "#define WARN_$Value{$k}"), "$k\n" ; |
| 217 | } |
| 218 | print WARN "\n" ; |
| 219 | |
| 220 | print WARN tab(5, '#define WARNsize'), "$warn_size\n" ; |
| 221 | #print WARN tab(5, '#define WARN_ALLstring'), '"', ('\377' x $warn_size) , "\"\n" ; |
| 222 | print WARN tab(5, '#define WARN_ALLstring'), '"', ('\125' x $warn_size) , "\"\n" ; |
| 223 | print WARN tab(5, '#define WARN_NONEstring'), '"', ('\0' x $warn_size) , "\"\n" ; |
| 224 | |
| 225 | print WARN <<'EOM'; |
| 226 | |
| 227 | #define isLEXWARN_on (PL_curcop->cop_warnings != pWARN_STD) |
| 228 | #define isLEXWARN_off (PL_curcop->cop_warnings == pWARN_STD) |
| 229 | #define isWARN_ONCE (PL_dowarn & (G_WARN_ON|G_WARN_ONCE)) |
| 230 | #define isWARN_on(c,x) (IsSet(SvPVX(c), 2*(x))) |
| 231 | #define isWARNf_on(c,x) (IsSet(SvPVX(c), 2*(x)+1)) |
| 232 | |
| 233 | #define ckDEAD(x) \ |
| 234 | ( ! specialWARN(PL_curcop->cop_warnings) && \ |
| 235 | ( isWARNf_on(PL_curcop->cop_warnings, WARN_ALL) || \ |
| 236 | isWARNf_on(PL_curcop->cop_warnings, x))) |
| 237 | |
| 238 | #define ckWARN(x) \ |
| 239 | ( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \ |
| 240 | (PL_curcop->cop_warnings == pWARN_ALL || \ |
| 241 | isWARN_on(PL_curcop->cop_warnings, x) ) ) \ |
| 242 | || (isLEXWARN_off && PL_dowarn & G_WARN_ON) ) |
| 243 | |
| 244 | #define ckWARN2(x,y) \ |
| 245 | ( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \ |
| 246 | (PL_curcop->cop_warnings == pWARN_ALL || \ |
| 247 | isWARN_on(PL_curcop->cop_warnings, x) || \ |
| 248 | isWARN_on(PL_curcop->cop_warnings, y) ) ) \ |
| 249 | || (isLEXWARN_off && PL_dowarn & G_WARN_ON) ) |
| 250 | |
| 251 | #define ckWARN_d(x) \ |
| 252 | (isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \ |
| 253 | (PL_curcop->cop_warnings != pWARN_NONE && \ |
| 254 | isWARN_on(PL_curcop->cop_warnings, x) ) ) |
| 255 | |
| 256 | #define ckWARN2_d(x,y) \ |
| 257 | (isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \ |
| 258 | (PL_curcop->cop_warnings != pWARN_NONE && \ |
| 259 | (isWARN_on(PL_curcop->cop_warnings, x) || \ |
| 260 | isWARN_on(PL_curcop->cop_warnings, y) ) ) ) |
| 261 | |
| 262 | /* end of file warnings.h */ |
| 263 | |
| 264 | EOM |
| 265 | |
| 266 | close WARN ; |
| 267 | |
| 268 | while (<DATA>) { |
| 269 | last if /^KEYWORDS$/ ; |
| 270 | print PM $_ ; |
| 271 | } |
| 272 | |
| 273 | #$list{'all'} = [ $offset .. 8 * ($warn_size/2) - 1 ] ; |
| 274 | |
| 275 | #my %Keys = map {lc $Value{$_}, $_} keys %Value ; |
| 276 | |
| 277 | print PM "%Offsets = (\n" ; |
| 278 | foreach my $k (sort { $a <=> $b } keys %Value) { |
| 279 | my $v = lc $Value{$k} ; |
| 280 | $k *= 2 ; |
| 281 | print PM tab(4, " '$v'"), "=> $k,\n" ; |
| 282 | } |
| 283 | |
| 284 | print PM " );\n\n" ; |
| 285 | |
| 286 | print PM "%Bits = (\n" ; |
| 287 | foreach $k (sort keys %list) { |
| 288 | |
| 289 | my $v = $list{$k} ; |
| 290 | my @list = sort { $a <=> $b } @$v ; |
| 291 | |
| 292 | print PM tab(4, " '$k'"), '=> "', |
| 293 | # mkHex($warn_size, @list), |
| 294 | mkHex($warn_size, map $_ * 2 , @list), |
| 295 | '", # [', mkRange(@list), "]\n" ; |
| 296 | } |
| 297 | |
| 298 | print PM " );\n\n" ; |
| 299 | |
| 300 | print PM "%DeadBits = (\n" ; |
| 301 | foreach $k (sort keys %list) { |
| 302 | |
| 303 | my $v = $list{$k} ; |
| 304 | my @list = sort { $a <=> $b } @$v ; |
| 305 | |
| 306 | print PM tab(4, " '$k'"), '=> "', |
| 307 | # mkHex($warn_size, @list), |
| 308 | mkHex($warn_size, map $_ * 2 + 1 , @list), |
| 309 | '", # [', mkRange(@list), "]\n" ; |
| 310 | } |
| 311 | |
| 312 | print PM " );\n\n" ; |
| 313 | print PM '$NONE = "', ('\0' x $warn_size) , "\";\n" ; |
| 314 | print PM '$LAST_BIT = ' . "$index ;\n" ; |
| 315 | print PM '$BYTES = ' . "$warn_size ;\n" ; |
| 316 | while (<DATA>) { |
| 317 | print PM $_ ; |
| 318 | } |
| 319 | |
| 320 | close PM ; |
| 321 | |
| 322 | __END__ |
| 323 | |
| 324 | # This file was created by warnings.pl |
| 325 | # Any changes made here will be lost. |
| 326 | # |
| 327 | |
| 328 | package warnings; |
| 329 | |
| 330 | =head1 NAME |
| 331 | |
| 332 | warnings - Perl pragma to control optional warnings |
| 333 | |
| 334 | =head1 SYNOPSIS |
| 335 | |
| 336 | use warnings; |
| 337 | no warnings; |
| 338 | |
| 339 | use warnings "all"; |
| 340 | no warnings "all"; |
| 341 | |
| 342 | use warnings::register; |
| 343 | if (warnings::enabled()) { |
| 344 | warnings::warn("some warning"); |
| 345 | } |
| 346 | |
| 347 | if (warnings::enabled("void")) { |
| 348 | warnings::warn("void", "some warning"); |
| 349 | } |
| 350 | |
| 351 | =head1 DESCRIPTION |
| 352 | |
| 353 | If no import list is supplied, all possible warnings are either enabled |
| 354 | or disabled. |
| 355 | |
| 356 | A number of functions are provided to assist module authors. |
| 357 | |
| 358 | =over 4 |
| 359 | |
| 360 | =item use warnings::register |
| 361 | |
| 362 | Creates a new warnings category which has the same name as the module |
| 363 | where the call to the pragma is used. |
| 364 | |
| 365 | =item warnings::enabled([$category]) |
| 366 | |
| 367 | Returns TRUE if the warnings category C<$category> is enabled in the |
| 368 | calling module. Otherwise returns FALSE. |
| 369 | |
| 370 | If the parameter, C<$category>, isn't supplied, the current package name |
| 371 | will be used. |
| 372 | |
| 373 | =item warnings::warn([$category,] $message) |
| 374 | |
| 375 | If the calling module has I<not> set C<$category> to "FATAL", print |
| 376 | C<$message> to STDERR. |
| 377 | If the calling module has set C<$category> to "FATAL", print C<$message> |
| 378 | STDERR then die. |
| 379 | |
| 380 | If the parameter, C<$category>, isn't supplied, the current package name |
| 381 | will be used. |
| 382 | |
| 383 | =back |
| 384 | |
| 385 | See L<perlmodlib/Pragmatic Modules> and L<perllexwarn>. |
| 386 | |
| 387 | =cut |
| 388 | |
| 389 | use Carp ; |
| 390 | |
| 391 | KEYWORDS |
| 392 | |
| 393 | $All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ; |
| 394 | |
| 395 | sub bits { |
| 396 | my $mask ; |
| 397 | my $catmask ; |
| 398 | my $fatal = 0 ; |
| 399 | foreach my $word (@_) { |
| 400 | if ($word eq 'FATAL') { |
| 401 | $fatal = 1; |
| 402 | } |
| 403 | elsif ($catmask = $Bits{$word}) { |
| 404 | $mask |= $catmask ; |
| 405 | $mask |= $DeadBits{$word} if $fatal ; |
| 406 | } |
| 407 | else |
| 408 | { croak("unknown warnings category '$word'")} |
| 409 | } |
| 410 | |
| 411 | return $mask ; |
| 412 | } |
| 413 | |
| 414 | sub import { |
| 415 | shift; |
| 416 | ${^WARNING_BITS} |= bits(@_ ? @_ : 'all') ; |
| 417 | } |
| 418 | |
| 419 | sub unimport { |
| 420 | shift; |
| 421 | my $mask = ${^WARNING_BITS} ; |
| 422 | if (vec($mask, $Offsets{'all'}, 1)) { |
| 423 | $mask = $Bits{'all'} ; |
| 424 | $mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1); |
| 425 | } |
| 426 | ${^WARNING_BITS} = $mask & ~ (bits(@_ ? @_ : 'all') | $All) ; |
| 427 | } |
| 428 | |
| 429 | sub enabled |
| 430 | { |
| 431 | croak("Usage: warnings::enabled([category])") |
| 432 | unless @_ == 1 || @_ == 0 ; |
| 433 | local $Carp::CarpLevel = 1 ; |
| 434 | my $category ; |
| 435 | my $offset ; |
| 436 | my $callers_bitmask = (caller(1))[9] ; |
| 437 | return 0 unless defined $callers_bitmask ; |
| 438 | |
| 439 | |
| 440 | if (@_) { |
| 441 | # check the category supplied. |
| 442 | $category = shift ; |
| 443 | $offset = $Offsets{$category}; |
| 444 | croak("unknown warnings category '$category'") |
| 445 | unless defined $offset; |
| 446 | } |
| 447 | else { |
| 448 | $category = (caller(0))[0] ; |
| 449 | $offset = $Offsets{$category}; |
| 450 | croak("package '$category' not registered for warnings") |
| 451 | unless defined $offset ; |
| 452 | } |
| 453 | |
| 454 | return vec($callers_bitmask, $offset, 1) || |
| 455 | vec($callers_bitmask, $Offsets{'all'}, 1) ; |
| 456 | } |
| 457 | |
| 458 | |
| 459 | sub warn |
| 460 | { |
| 461 | croak("Usage: warnings::warn([category,] 'message')") |
| 462 | unless @_ == 2 || @_ == 1 ; |
| 463 | local $Carp::CarpLevel = 1 ; |
| 464 | my $category ; |
| 465 | my $offset ; |
| 466 | my $callers_bitmask = (caller(1))[9] ; |
| 467 | |
| 468 | if (@_ == 2) { |
| 469 | $category = shift ; |
| 470 | $offset = $Offsets{$category}; |
| 471 | croak("unknown warnings category '$category'") |
| 472 | unless defined $offset ; |
| 473 | } |
| 474 | else { |
| 475 | $category = (caller(0))[0] ; |
| 476 | $offset = $Offsets{$category}; |
| 477 | croak("package '$category' not registered for warnings") |
| 478 | unless defined $offset ; |
| 479 | } |
| 480 | |
| 481 | my $message = shift ; |
| 482 | croak($message) |
| 483 | if vec($callers_bitmask, $offset+1, 1) || |
| 484 | vec($callers_bitmask, $Offsets{'all'}+1, 1) ; |
| 485 | carp($message) ; |
| 486 | } |
| 487 | |
| 488 | 1; |