| 1 | #!/usr/bin/perl |
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| 2 | |
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| 3 | BEGIN { |
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| 4 | push @INC, './lib'; |
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| 5 | } |
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| 6 | use strict ; |
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| 7 | |
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| 8 | sub DEFAULT_ON () { 1 } |
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| 9 | sub DEFAULT_OFF () { 2 } |
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| 10 | |
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| 11 | my $tree = { |
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| 12 | |
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| 13 | 'all' => { |
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| 14 | 'io' => { 'pipe' => DEFAULT_OFF, |
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| 15 | 'unopened' => DEFAULT_OFF, |
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| 16 | 'closed' => DEFAULT_OFF, |
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| 17 | 'newline' => DEFAULT_OFF, |
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| 18 | 'exec' => DEFAULT_OFF, |
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| 19 | }, |
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| 20 | 'syntax' => { 'ambiguous' => DEFAULT_OFF, |
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| 21 | 'semicolon' => DEFAULT_OFF, |
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| 22 | 'precedence' => DEFAULT_OFF, |
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| 23 | 'bareword' => DEFAULT_OFF, |
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| 24 | 'reserved' => DEFAULT_OFF, |
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| 25 | 'digit' => DEFAULT_OFF, |
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| 26 | 'parenthesis' => DEFAULT_OFF, |
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| 27 | 'deprecated' => DEFAULT_OFF, |
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| 28 | 'printf' => DEFAULT_OFF, |
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| 29 | 'prototype' => DEFAULT_OFF, |
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| 30 | 'qw' => DEFAULT_OFF, |
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| 31 | }, |
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| 32 | 'severe' => { 'inplace' => DEFAULT_ON, |
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| 33 | 'internal' => DEFAULT_ON, |
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| 34 | 'debugging' => DEFAULT_ON, |
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| 35 | 'malloc' => DEFAULT_ON, |
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| 36 | }, |
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| 37 | 'void' => DEFAULT_OFF, |
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| 38 | 'recursion' => DEFAULT_OFF, |
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| 39 | 'redefine' => DEFAULT_OFF, |
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| 40 | 'numeric' => DEFAULT_OFF, |
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| 41 | 'uninitialized' => DEFAULT_OFF, |
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| 42 | 'once' => DEFAULT_OFF, |
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| 43 | 'misc' => DEFAULT_OFF, |
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| 44 | 'regexp' => DEFAULT_OFF, |
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| 45 | 'glob' => DEFAULT_OFF, |
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| 46 | 'y2k' => DEFAULT_OFF, |
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| 47 | 'chmod' => DEFAULT_OFF, |
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| 48 | 'umask' => DEFAULT_OFF, |
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| 49 | 'untie' => DEFAULT_OFF, |
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| 50 | 'substr' => DEFAULT_OFF, |
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| 51 | 'taint' => DEFAULT_OFF, |
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| 52 | 'signal' => DEFAULT_OFF, |
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| 53 | 'closure' => DEFAULT_OFF, |
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| 54 | 'overflow' => DEFAULT_OFF, |
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| 55 | 'portable' => DEFAULT_OFF, |
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| 56 | 'utf8' => DEFAULT_OFF, |
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| 57 | 'exiting' => DEFAULT_OFF, |
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| 58 | 'pack' => DEFAULT_OFF, |
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| 59 | 'unpack' => DEFAULT_OFF, |
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| 60 | #'default' => DEFAULT_ON, |
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| 61 | } |
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| 62 | } ; |
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| 63 | |
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| 64 | |
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| 65 | ########################################################################### |
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| 66 | sub tab { |
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| 67 | my($l, $t) = @_; |
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| 68 | $t .= "\t" x ($l - (length($t) + 1) / 8); |
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| 69 | $t; |
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| 70 | } |
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| 71 | |
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| 72 | ########################################################################### |
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| 73 | |
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| 74 | my %list ; |
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| 75 | my %Value ; |
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| 76 | my $index ; |
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| 77 | |
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| 78 | sub walk |
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| 79 | { |
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| 80 | my $tre = shift ; |
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| 81 | my @list = () ; |
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| 82 | my ($k, $v) ; |
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| 83 | |
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| 84 | foreach $k (sort keys %$tre) { |
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| 85 | $v = $tre->{$k}; |
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| 86 | die "duplicate key $k\n" if defined $list{$k} ; |
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| 87 | $Value{$index} = uc $k ; |
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| 88 | push @{ $list{$k} }, $index ++ ; |
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| 89 | if (ref $v) |
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| 90 | { push (@{ $list{$k} }, walk ($v)) } |
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| 91 | push @list, @{ $list{$k} } ; |
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| 92 | } |
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| 93 | |
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| 94 | return @list ; |
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| 95 | } |
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| 96 | |
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| 97 | ########################################################################### |
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| 98 | |
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| 99 | sub mkRange |
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| 100 | { |
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| 101 | my @a = @_ ; |
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| 102 | my @out = @a ; |
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| 103 | my $i ; |
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| 104 | |
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| 105 | |
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| 106 | for ($i = 1 ; $i < @a; ++ $i) { |
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| 107 | $out[$i] = ".." |
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| 108 | if $a[$i] == $a[$i - 1] + 1 && $a[$i] + 1 == $a[$i + 1] ; |
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| 109 | } |
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| 110 | |
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| 111 | my $out = join(",",@out); |
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| 112 | |
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| 113 | $out =~ s/,(\.\.,)+/../g ; |
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| 114 | return $out; |
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| 115 | } |
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| 116 | |
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| 117 | ########################################################################### |
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| 118 | sub printTree |
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| 119 | { |
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| 120 | my $tre = shift ; |
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| 121 | my $prefix = shift ; |
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| 122 | my $indent = shift ; |
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| 123 | my ($k, $v) ; |
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| 124 | |
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| 125 | my $max = (sort {$a <=> $b} map { length $_ } keys %$tre)[-1] ; |
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| 126 | |
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| 127 | $prefix .= " " x $indent ; |
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| 128 | foreach $k (sort keys %$tre) { |
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| 129 | $v = $tre->{$k}; |
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| 130 | print $prefix . "|\n" ; |
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| 131 | print $prefix . "+- $k" ; |
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| 132 | if (ref $v) |
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| 133 | { |
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| 134 | print " " . "-" x ($max - length $k ) . "+\n" ; |
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| 135 | printTree ($v, $prefix . "|" , $max + $indent - 1) |
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| 136 | } |
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| 137 | else |
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| 138 | { print "\n" } |
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| 139 | } |
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| 140 | |
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| 141 | } |
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| 142 | |
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| 143 | ########################################################################### |
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| 144 | |
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| 145 | sub mkHex |
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| 146 | { |
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| 147 | my ($max, @a) = @_ ; |
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| 148 | my $mask = "\x00" x $max ; |
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| 149 | my $string = "" ; |
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| 150 | |
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| 151 | foreach (@a) { |
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| 152 | vec($mask, $_, 1) = 1 ; |
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| 153 | } |
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| 154 | |
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| 155 | #$string = unpack("H$max", $mask) ; |
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| 156 | #$string =~ s/(..)/\x$1/g; |
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| 157 | foreach (unpack("C*", $mask)) { |
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| 158 | $string .= '\x' . sprintf("%2.2x", $_) ; |
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| 159 | } |
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| 160 | return $string ; |
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| 161 | } |
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| 162 | |
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| 163 | ########################################################################### |
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| 164 | |
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| 165 | if (@ARGV && $ARGV[0] eq "tree") |
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| 166 | { |
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| 167 | #print " all -+\n" ; |
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| 168 | printTree($tree, " ", 4) ; |
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| 169 | exit ; |
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| 170 | } |
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| 171 | |
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| 172 | #unlink "warnings.h"; |
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| 173 | #unlink "lib/warnings.pm"; |
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| 174 | open(WARN, ">warnings.h") || die "Can't create warnings.h: $!\n"; |
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| 175 | open(PM, ">lib/warnings.pm") || die "Can't create lib/warnings.pm: $!\n"; |
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| 176 | |
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| 177 | print WARN <<'EOM' ; |
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| 178 | /* !!!!!!! DO NOT EDIT THIS FILE !!!!!!! |
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| 179 | This file is built by warnings.pl |
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| 180 | Any changes made here will be lost! |
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| 181 | */ |
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| 182 | |
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| 183 | |
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| 184 | #define Off(x) ((x) / 8) |
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| 185 | #define Bit(x) (1 << ((x) % 8)) |
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| 186 | #define IsSet(a, x) ((a)[Off(x)] & Bit(x)) |
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| 187 | |
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| 188 | |
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| 189 | #define G_WARN_OFF 0 /* $^W == 0 */ |
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| 190 | #define G_WARN_ON 1 /* -w flag and $^W != 0 */ |
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| 191 | #define G_WARN_ALL_ON 2 /* -W flag */ |
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| 192 | #define G_WARN_ALL_OFF 4 /* -X flag */ |
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| 193 | #define G_WARN_ONCE 8 /* set if 'once' ever enabled */ |
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| 194 | #define G_WARN_ALL_MASK (G_WARN_ALL_ON|G_WARN_ALL_OFF) |
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| 195 | |
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| 196 | #define pWARN_STD Nullsv |
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| 197 | #define pWARN_ALL (Nullsv+1) /* use warnings 'all' */ |
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| 198 | #define pWARN_NONE (Nullsv+2) /* no warnings 'all' */ |
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| 199 | |
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| 200 | #define specialWARN(x) ((x) == pWARN_STD || (x) == pWARN_ALL || \ |
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| 201 | (x) == pWARN_NONE) |
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| 202 | |
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| 203 | #define ckDEAD(x) \ |
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| 204 | ( ! specialWARN(PL_curcop->cop_warnings) && \ |
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| 205 | IsSet(SvPVX(PL_curcop->cop_warnings), 2*x+1)) |
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| 206 | |
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| 207 | #define ckWARN(x) \ |
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| 208 | ( (PL_curcop->cop_warnings != pWARN_STD && \ |
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| 209 | PL_curcop->cop_warnings != pWARN_NONE && \ |
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| 210 | (PL_curcop->cop_warnings == pWARN_ALL || \ |
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| 211 | IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) ) ) \ |
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| 212 | || (PL_curcop->cop_warnings == pWARN_STD && PL_dowarn & G_WARN_ON) ) |
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| 213 | |
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| 214 | #define ckWARN2(x,y) \ |
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| 215 | ( (PL_curcop->cop_warnings != pWARN_STD && \ |
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| 216 | PL_curcop->cop_warnings != pWARN_NONE && \ |
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| 217 | (PL_curcop->cop_warnings == pWARN_ALL || \ |
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| 218 | IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) || \ |
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| 219 | IsSet(SvPVX(PL_curcop->cop_warnings), 2*y) ) ) \ |
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| 220 | || (PL_curcop->cop_warnings == pWARN_STD && PL_dowarn & G_WARN_ON) ) |
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| 221 | |
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| 222 | #define ckWARN_d(x) \ |
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| 223 | (PL_curcop->cop_warnings == pWARN_STD || \ |
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| 224 | PL_curcop->cop_warnings == pWARN_ALL || \ |
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| 225 | (PL_curcop->cop_warnings != pWARN_NONE && \ |
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| 226 | IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) ) ) |
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| 227 | |
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| 228 | #define ckWARN2_d(x,y) \ |
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| 229 | (PL_curcop->cop_warnings == pWARN_STD || \ |
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| 230 | PL_curcop->cop_warnings == pWARN_ALL || \ |
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| 231 | (PL_curcop->cop_warnings != pWARN_NONE && \ |
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| 232 | (IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) || \ |
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| 233 | IsSet(SvPVX(PL_curcop->cop_warnings), 2*y) ) ) ) |
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| 234 | |
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| 235 | |
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| 236 | #define isLEXWARN_on (PL_curcop->cop_warnings != pWARN_STD) |
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| 237 | #define isLEXWARN_off (PL_curcop->cop_warnings == pWARN_STD) |
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| 238 | #define isWARN_ONCE (PL_dowarn & (G_WARN_ON|G_WARN_ONCE)) |
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| 239 | #define isWARN_on(c,x) (IsSet(SvPVX(c), 2*(x))) |
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| 240 | |
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| 241 | EOM |
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| 242 | |
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| 243 | my $offset = 0 ; |
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| 244 | |
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| 245 | $index = $offset ; |
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| 246 | #@{ $list{"all"} } = walk ($tree) ; |
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| 247 | walk ($tree) ; |
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| 248 | |
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| 249 | |
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| 250 | $index *= 2 ; |
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| 251 | my $warn_size = int($index / 8) + ($index % 8 != 0) ; |
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| 252 | |
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| 253 | my $k ; |
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| 254 | foreach $k (sort { $a <=> $b } keys %Value) { |
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| 255 | print WARN tab(5, "#define WARN_$Value{$k}"), "$k\n" ; |
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| 256 | } |
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| 257 | print WARN "\n" ; |
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| 258 | |
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| 259 | print WARN tab(5, '#define WARNsize'), "$warn_size\n" ; |
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| 260 | #print WARN tab(5, '#define WARN_ALLstring'), '"', ('\377' x $warn_size) , "\"\n" ; |
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| 261 | print WARN tab(5, '#define WARN_ALLstring'), '"', ('\125' x $warn_size) , "\"\n" ; |
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| 262 | print WARN tab(5, '#define WARN_NONEstring'), '"', ('\0' x $warn_size) , "\"\n" ; |
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| 263 | |
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| 264 | print WARN <<'EOM'; |
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| 265 | |
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| 266 | /* end of file warnings.h */ |
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| 267 | |
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| 268 | EOM |
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| 269 | |
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| 270 | close WARN ; |
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| 271 | |
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| 272 | while (<DATA>) { |
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| 273 | last if /^KEYWORDS$/ ; |
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| 274 | print PM $_ ; |
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| 275 | } |
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| 276 | |
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| 277 | #$list{'all'} = [ $offset .. 8 * ($warn_size/2) - 1 ] ; |
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| 278 | |
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| 279 | #my %Keys = map {lc $Value{$_}, $_} keys %Value ; |
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| 280 | |
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| 281 | print PM "%Offsets = (\n" ; |
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| 282 | foreach my $k (sort { $a <=> $b } keys %Value) { |
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| 283 | my $v = lc $Value{$k} ; |
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| 284 | $k *= 2 ; |
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| 285 | print PM tab(4, " '$v'"), "=> $k,\n" ; |
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| 286 | } |
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| 287 | |
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| 288 | print PM " );\n\n" ; |
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| 289 | |
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| 290 | print PM "%Bits = (\n" ; |
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| 291 | foreach $k (sort keys %list) { |
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| 292 | |
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| 293 | my $v = $list{$k} ; |
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| 294 | my @list = sort { $a <=> $b } @$v ; |
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| 295 | |
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| 296 | print PM tab(4, " '$k'"), '=> "', |
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| 297 | # mkHex($warn_size, @list), |
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| 298 | mkHex($warn_size, map $_ * 2 , @list), |
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| 299 | '", # [', mkRange(@list), "]\n" ; |
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| 300 | } |
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| 301 | |
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| 302 | print PM " );\n\n" ; |
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| 303 | |
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| 304 | print PM "%DeadBits = (\n" ; |
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| 305 | foreach $k (sort keys %list) { |
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| 306 | |
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| 307 | my $v = $list{$k} ; |
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| 308 | my @list = sort { $a <=> $b } @$v ; |
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| 309 | |
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| 310 | print PM tab(4, " '$k'"), '=> "', |
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| 311 | # mkHex($warn_size, @list), |
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| 312 | mkHex($warn_size, map $_ * 2 + 1 , @list), |
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| 313 | '", # [', mkRange(@list), "]\n" ; |
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| 314 | } |
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| 315 | |
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| 316 | print PM " );\n\n" ; |
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| 317 | print PM '$NONE = "', ('\0' x $warn_size) , "\";\n" ; |
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| 318 | print PM '$LAST_BIT = ' . "$index ;\n" ; |
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| 319 | print PM '$BYTES = ' . "$warn_size ;\n" ; |
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| 320 | while (<DATA>) { |
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| 321 | print PM $_ ; |
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| 322 | } |
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| 323 | |
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| 324 | close PM ; |
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| 325 | |
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| 326 | __END__ |
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| 327 | |
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| 328 | # This file was created by warnings.pl |
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| 329 | # Any changes made here will be lost. |
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| 330 | # |
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| 331 | |
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| 332 | package warnings; |
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| 333 | |
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| 334 | =head1 NAME |
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| 335 | |
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| 336 | warnings - Perl pragma to control optional warnings |
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| 337 | |
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| 338 | =head1 SYNOPSIS |
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| 339 | |
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| 340 | use warnings; |
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| 341 | no warnings; |
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| 342 | |
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| 343 | use warnings "all"; |
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| 344 | no warnings "all"; |
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| 345 | |
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| 346 | use warnings::register; |
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| 347 | if (warnings::enabled()) { |
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| 348 | warnings::warn("some warning"); |
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| 349 | } |
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| 350 | |
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| 351 | if (warnings::enabled("void")) { |
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| 352 | warnings::warn("void", "some warning"); |
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| 353 | } |
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| 354 | |
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| 355 | =head1 DESCRIPTION |
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| 356 | |
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| 357 | If no import list is supplied, all possible warnings are either enabled |
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| 358 | or disabled. |
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| 359 | |
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| 360 | A number of functions are provided to assist module authors. |
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| 361 | |
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| 362 | =over 4 |
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| 363 | |
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| 364 | =item use warnings::register |
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| 365 | |
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| 366 | Creates a new warnings category which has the same name as the module |
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| 367 | where the call to the pragma is used. |
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| 368 | |
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| 369 | =item warnings::enabled([$category]) |
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| 370 | |
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| 371 | Returns TRUE if the warnings category C<$category> is enabled in the |
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| 372 | calling module. Otherwise returns FALSE. |
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| 373 | |
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| 374 | If the parameter, C<$category>, isn't supplied, the current package name |
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| 375 | will be used. |
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| 376 | |
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| 377 | =item warnings::warn([$category,] $message) |
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| 378 | |
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| 379 | If the calling module has I<not> set C<$category> to "FATAL", print |
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| 380 | C<$message> to STDERR. |
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| 381 | If the calling module has set C<$category> to "FATAL", print C<$message> |
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| 382 | STDERR then die. |
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| 383 | |
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| 384 | If the parameter, C<$category>, isn't supplied, the current package name |
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| 385 | will be used. |
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| 386 | |
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| 387 | =back |
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| 388 | |
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| 389 | See L<perlmod/Pragmatic Modules> and L<perllexwarn>. |
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| 390 | |
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| 391 | =cut |
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| 392 | |
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| 393 | use Carp ; |
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| 394 | |
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| 395 | KEYWORDS |
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| 396 | |
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| 397 | $All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ; |
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| 398 | |
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| 399 | sub bits { |
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| 400 | my $mask ; |
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| 401 | my $catmask ; |
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| 402 | my $fatal = 0 ; |
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| 403 | foreach my $word (@_) { |
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| 404 | if ($word eq 'FATAL') { |
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| 405 | $fatal = 1; |
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| 406 | } |
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| 407 | elsif ($catmask = $Bits{$word}) { |
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| 408 | $mask |= $catmask ; |
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| 409 | $mask |= $DeadBits{$word} if $fatal ; |
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| 410 | } |
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| 411 | else |
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| 412 | { croak("unknown warnings category '$word'")} |
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| 413 | } |
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| 414 | |
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| 415 | return $mask ; |
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| 416 | } |
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| 417 | |
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| 418 | sub import { |
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| 419 | shift; |
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| 420 | ${^WARNING_BITS} |= bits(@_ ? @_ : 'all') ; |
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| 421 | } |
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| 422 | |
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| 423 | sub unimport { |
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| 424 | shift; |
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| 425 | my $mask = ${^WARNING_BITS} ; |
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| 426 | if (vec($mask, $Offsets{'all'}, 1)) { |
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| 427 | $mask = $Bits{'all'} ; |
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| 428 | $mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1); |
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| 429 | } |
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| 430 | ${^WARNING_BITS} = $mask & ~ (bits(@_ ? @_ : 'all') | $All) ; |
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| 431 | } |
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| 432 | |
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| 433 | sub enabled |
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| 434 | { |
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| 435 | croak("Usage: warnings::enabled([category])") |
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| 436 | unless @_ == 1 || @_ == 0 ; |
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| 437 | local $Carp::CarpLevel = 1 ; |
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| 438 | my $category ; |
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| 439 | my $offset ; |
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| 440 | my $callers_bitmask = (caller(1))[9] ; |
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| 441 | return 0 unless defined $callers_bitmask ; |
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| 442 | |
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| 443 | |
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| 444 | if (@_) { |
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| 445 | # check the category supplied. |
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| 446 | $category = shift ; |
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| 447 | $offset = $Offsets{$category}; |
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| 448 | croak("unknown warnings category '$category'") |
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| 449 | unless defined $offset; |
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| 450 | } |
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| 451 | else { |
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| 452 | $category = (caller(0))[0] ; |
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| 453 | $offset = $Offsets{$category}; |
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| 454 | croak("package '$category' not registered for warnings") |
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| 455 | unless defined $offset ; |
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| 456 | } |
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| 457 | |
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| 458 | return vec($callers_bitmask, $offset, 1) || |
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| 459 | vec($callers_bitmask, $Offsets{'all'}, 1) ; |
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| 460 | } |
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| 461 | |
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| 462 | |
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| 463 | sub warn |
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| 464 | { |
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| 465 | croak("Usage: warnings::warn([category,] 'message')") |
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| 466 | unless @_ == 2 || @_ == 1 ; |
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| 467 | local $Carp::CarpLevel = 1 ; |
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| 468 | my $category ; |
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| 469 | my $offset ; |
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| 470 | my $callers_bitmask = (caller(1))[9] ; |
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| 471 | |
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| 472 | if (@_ == 2) { |
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| 473 | $category = shift ; |
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| 474 | $offset = $Offsets{$category}; |
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| 475 | croak("unknown warnings category '$category'") |
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| 476 | unless defined $offset ; |
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| 477 | } |
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| 478 | else { |
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| 479 | $category = (caller(0))[0] ; |
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| 480 | $offset = $Offsets{$category}; |
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| 481 | croak("package '$category' not registered for warnings") |
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| 482 | unless defined $offset ; |
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| 483 | } |
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| 484 | |
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| 485 | my $message = shift ; |
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| 486 | croak($message) |
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| 487 | if vec($callers_bitmask, $offset+1, 1) || |
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| 488 | vec($callers_bitmask, $Offsets{'all'}+1, 1) ; |
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| 489 | carp($message) ; |
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| 490 | } |
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| 491 | |
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| 492 | 1; |
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