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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