590 lines
14 KiB
Perl
590 lines
14 KiB
Perl
#!/usr/bin/perl
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BEGIN {
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push @INC, './lib';
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}
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use strict ;
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sub DEFAULT_ON () { 1 }
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sub DEFAULT_OFF () { 2 }
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my $tree = {
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'all' => {
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'io' => { 'pipe' => DEFAULT_OFF,
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'unopened' => DEFAULT_OFF,
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'closed' => DEFAULT_OFF,
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'newline' => DEFAULT_OFF,
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'exec' => DEFAULT_OFF,
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},
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'syntax' => { 'ambiguous' => DEFAULT_OFF,
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'semicolon' => DEFAULT_OFF,
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'precedence' => DEFAULT_OFF,
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'bareword' => DEFAULT_OFF,
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'reserved' => DEFAULT_OFF,
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'digit' => DEFAULT_OFF,
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'parenthesis' => DEFAULT_OFF,
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'deprecated' => DEFAULT_OFF,
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'printf' => DEFAULT_OFF,
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'prototype' => DEFAULT_OFF,
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'qw' => DEFAULT_OFF,
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},
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'severe' => { 'inplace' => DEFAULT_ON,
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'internal' => DEFAULT_ON,
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'debugging' => DEFAULT_ON,
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'malloc' => DEFAULT_ON,
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},
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'void' => DEFAULT_OFF,
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'recursion' => DEFAULT_OFF,
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'redefine' => DEFAULT_OFF,
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'numeric' => DEFAULT_OFF,
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'uninitialized' => DEFAULT_OFF,
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'once' => DEFAULT_OFF,
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'misc' => DEFAULT_OFF,
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'regexp' => DEFAULT_OFF,
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'glob' => DEFAULT_OFF,
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'y2k' => DEFAULT_OFF,
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'chmod' => DEFAULT_OFF,
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'umask' => DEFAULT_OFF,
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'untie' => DEFAULT_OFF,
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'substr' => DEFAULT_OFF,
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'taint' => DEFAULT_OFF,
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'signal' => DEFAULT_OFF,
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'closure' => DEFAULT_OFF,
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'overflow' => DEFAULT_OFF,
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'portable' => DEFAULT_OFF,
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'utf8' => DEFAULT_OFF,
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'exiting' => DEFAULT_OFF,
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'pack' => DEFAULT_OFF,
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'unpack' => DEFAULT_OFF,
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#'default' => DEFAULT_ON,
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}
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} ;
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###########################################################################
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sub tab {
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my($l, $t) = @_;
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$t .= "\t" x ($l - (length($t) + 1) / 8);
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$t;
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}
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###########################################################################
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my %list ;
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my %Value ;
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my $index ;
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sub walk
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{
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my $tre = shift ;
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my @list = () ;
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my ($k, $v) ;
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foreach $k (sort keys %$tre) {
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$v = $tre->{$k};
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die "duplicate key $k\n" if defined $list{$k} ;
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$Value{$index} = uc $k ;
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push @{ $list{$k} }, $index ++ ;
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if (ref $v)
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{ push (@{ $list{$k} }, walk ($v)) }
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push @list, @{ $list{$k} } ;
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}
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return @list ;
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}
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###########################################################################
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sub mkRange
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{
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my @a = @_ ;
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my @out = @a ;
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my $i ;
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for ($i = 1 ; $i < @a; ++ $i) {
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$out[$i] = ".."
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if $a[$i] == $a[$i - 1] + 1 && $a[$i] + 1 == $a[$i + 1] ;
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}
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my $out = join(",",@out);
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$out =~ s/,(\.\.,)+/../g ;
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return $out;
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}
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###########################################################################
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sub printTree
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{
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my $tre = shift ;
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my $prefix = shift ;
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my $indent = shift ;
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my ($k, $v) ;
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my $max = (sort {$a <=> $b} map { length $_ } keys %$tre)[-1] ;
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$prefix .= " " x $indent ;
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foreach $k (sort keys %$tre) {
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$v = $tre->{$k};
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print $prefix . "|\n" ;
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print $prefix . "+- $k" ;
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if (ref $v)
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{
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print " " . "-" x ($max - length $k ) . "+\n" ;
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printTree ($v, $prefix . "|" , $max + $indent - 1)
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}
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else
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{ print "\n" }
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}
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}
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###########################################################################
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sub mkHex
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{
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my ($max, @a) = @_ ;
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my $mask = "\x00" x $max ;
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my $string = "" ;
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foreach (@a) {
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vec($mask, $_, 1) = 1 ;
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}
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#$string = unpack("H$max", $mask) ;
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#$string =~ s/(..)/\x$1/g;
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foreach (unpack("C*", $mask)) {
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$string .= '\x' . sprintf("%2.2x", $_) ;
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}
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return $string ;
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}
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###########################################################################
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if (@ARGV && $ARGV[0] eq "tree")
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{
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#print " all -+\n" ;
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printTree($tree, " ", 4) ;
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exit ;
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}
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unlink "warnings.h";
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unlink "lib/warnings.pm";
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open(WARN, ">warnings.h") || die "Can't create warnings.h: $!\n";
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open(PM, ">lib/warnings.pm") || die "Can't create lib/warnings.pm: $!\n";
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print WARN <<'EOM' ;
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/* !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
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This file is built by warnings.pl
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Any changes made here will be lost!
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*/
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#define Off(x) ((x) / 8)
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#define Bit(x) (1 << ((x) % 8))
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#define IsSet(a, x) ((a)[Off(x)] & Bit(x))
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#define G_WARN_OFF 0 /* $^W == 0 */
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#define G_WARN_ON 1 /* -w flag and $^W != 0 */
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#define G_WARN_ALL_ON 2 /* -W flag */
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#define G_WARN_ALL_OFF 4 /* -X flag */
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#define G_WARN_ONCE 8 /* set if 'once' ever enabled */
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#define G_WARN_ALL_MASK (G_WARN_ALL_ON|G_WARN_ALL_OFF)
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#define pWARN_STD Nullsv
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#define pWARN_ALL (Nullsv+1) /* use warnings 'all' */
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#define pWARN_NONE (Nullsv+2) /* no warnings 'all' */
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#define specialWARN(x) ((x) == pWARN_STD || (x) == pWARN_ALL || \
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(x) == pWARN_NONE)
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EOM
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my $offset = 0 ;
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$index = $offset ;
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#@{ $list{"all"} } = walk ($tree) ;
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walk ($tree) ;
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$index *= 2 ;
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my $warn_size = int($index / 8) + ($index % 8 != 0) ;
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my $k ;
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foreach $k (sort { $a <=> $b } keys %Value) {
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print WARN tab(5, "#define WARN_$Value{$k}"), "$k\n" ;
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}
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print WARN "\n" ;
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print WARN tab(5, '#define WARNsize'), "$warn_size\n" ;
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#print WARN tab(5, '#define WARN_ALLstring'), '"', ('\377' x $warn_size) , "\"\n" ;
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print WARN tab(5, '#define WARN_ALLstring'), '"', ('\125' x $warn_size) , "\"\n" ;
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print WARN tab(5, '#define WARN_NONEstring'), '"', ('\0' x $warn_size) , "\"\n" ;
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print WARN <<'EOM';
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#define isLEXWARN_on (PL_curcop->cop_warnings != pWARN_STD)
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#define isLEXWARN_off (PL_curcop->cop_warnings == pWARN_STD)
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#define isWARN_ONCE (PL_dowarn & (G_WARN_ON|G_WARN_ONCE))
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#define isWARN_on(c,x) (IsSet(SvPVX(c), 2*(x)))
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#define isWARNf_on(c,x) (IsSet(SvPVX(c), 2*(x)+1))
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#define ckDEAD(x) \
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( ! specialWARN(PL_curcop->cop_warnings) && \
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( isWARNf_on(PL_curcop->cop_warnings, WARN_ALL) || \
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isWARNf_on(PL_curcop->cop_warnings, x)))
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#define ckWARN(x) \
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( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \
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(PL_curcop->cop_warnings == pWARN_ALL || \
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isWARN_on(PL_curcop->cop_warnings, x) ) ) \
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|| (isLEXWARN_off && PL_dowarn & G_WARN_ON) )
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#define ckWARN2(x,y) \
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( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \
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(PL_curcop->cop_warnings == pWARN_ALL || \
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isWARN_on(PL_curcop->cop_warnings, x) || \
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isWARN_on(PL_curcop->cop_warnings, y) ) ) \
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|| (isLEXWARN_off && PL_dowarn & G_WARN_ON) )
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#define ckWARN_d(x) \
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(isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \
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(PL_curcop->cop_warnings != pWARN_NONE && \
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isWARN_on(PL_curcop->cop_warnings, x) ) )
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#define ckWARN2_d(x,y) \
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(isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \
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(PL_curcop->cop_warnings != pWARN_NONE && \
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(isWARN_on(PL_curcop->cop_warnings, x) || \
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isWARN_on(PL_curcop->cop_warnings, y) ) ) )
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/* end of file warnings.h */
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EOM
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close WARN ;
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while (<DATA>) {
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last if /^KEYWORDS$/ ;
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print PM $_ ;
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}
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#$list{'all'} = [ $offset .. 8 * ($warn_size/2) - 1 ] ;
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#my %Keys = map {lc $Value{$_}, $_} keys %Value ;
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print PM "%Offsets = (\n" ;
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foreach my $k (sort { $a <=> $b } keys %Value) {
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my $v = lc $Value{$k} ;
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$k *= 2 ;
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print PM tab(4, " '$v'"), "=> $k,\n" ;
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}
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print PM " );\n\n" ;
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print PM "%Bits = (\n" ;
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foreach $k (sort keys %list) {
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my $v = $list{$k} ;
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my @list = sort { $a <=> $b } @$v ;
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print PM tab(4, " '$k'"), '=> "',
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# mkHex($warn_size, @list),
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mkHex($warn_size, map $_ * 2 , @list),
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'", # [', mkRange(@list), "]\n" ;
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}
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print PM " );\n\n" ;
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print PM "%DeadBits = (\n" ;
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foreach $k (sort keys %list) {
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my $v = $list{$k} ;
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my @list = sort { $a <=> $b } @$v ;
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print PM tab(4, " '$k'"), '=> "',
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# mkHex($warn_size, @list),
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mkHex($warn_size, map $_ * 2 + 1 , @list),
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'", # [', mkRange(@list), "]\n" ;
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}
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print PM " );\n\n" ;
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print PM '$NONE = "', ('\0' x $warn_size) , "\";\n" ;
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print PM '$LAST_BIT = ' . "$index ;\n" ;
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print PM '$BYTES = ' . "$warn_size ;\n" ;
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while (<DATA>) {
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print PM $_ ;
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}
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close PM ;
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__END__
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# This file was created by warnings.pl
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# Any changes made here will be lost.
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#
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package warnings;
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=head1 NAME
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warnings - Perl pragma to control optional warnings
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=head1 SYNOPSIS
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use warnings;
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no warnings;
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use warnings "all";
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no warnings "all";
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use warnings::register;
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if (warnings::enabled()) {
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warnings::warn("some warning");
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}
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if (warnings::enabled("void")) {
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warnings::warn("void", "some warning");
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}
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if (warnings::enabled($object)) {
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warnings::warn($object, "some warning");
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}
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warnif("some warning");
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warnif("void", "some warning");
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warnif($object, "some warning");
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=head1 DESCRIPTION
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If no import list is supplied, all possible warnings are either enabled
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or disabled.
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A number of functions are provided to assist module authors.
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=over 4
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=item use warnings::register
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Creates a new warnings category with the same name as the package where
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the call to the pragma is used.
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=item warnings::enabled()
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Use the warnings category with the same name as the current package.
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Return TRUE if that warnings category is enabled in the calling module.
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Otherwise returns FALSE.
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=item warnings::enabled($category)
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Return TRUE if the warnings category, C<$category>, is enabled in the
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calling module.
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Otherwise returns FALSE.
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=item warnings::enabled($object)
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Use the name of the class for the object reference, C<$object>, as the
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warnings category.
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Return TRUE if that warnings category is enabled in the first scope
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where the object is used.
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Otherwise returns FALSE.
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=item warnings::warn($message)
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Print C<$message> to STDERR.
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Use the warnings category with the same name as the current package.
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If that warnings category has been set to "FATAL" in the calling module
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then die. Otherwise return.
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=item warnings::warn($category, $message)
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Print C<$message> to STDERR.
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If the warnings category, C<$category>, has been set to "FATAL" in the
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calling module then die. Otherwise return.
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=item warnings::warn($object, $message)
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Print C<$message> to STDERR.
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Use the name of the class for the object reference, C<$object>, as the
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warnings category.
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If that warnings category has been set to "FATAL" in the scope where C<$object>
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is first used then die. Otherwise return.
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=item warnings::warnif($message)
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Equivalent to:
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if (warnings::enabled())
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{ warnings::warn($message) }
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=item warnings::warnif($category, $message)
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Equivalent to:
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if (warnings::enabled($category))
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{ warnings::warn($category, $message) }
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=item warnings::warnif($object, $message)
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Equivalent to:
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if (warnings::enabled($object))
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{ warnings::warn($object, $message) }
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=back
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See L<perlmodlib/Pragmatic Modules> and L<perllexwarn>.
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=cut
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use Carp ;
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KEYWORDS
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$All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ;
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sub bits {
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my $mask ;
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my $catmask ;
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my $fatal = 0 ;
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foreach my $word (@_) {
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if ($word eq 'FATAL') {
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$fatal = 1;
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}
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elsif ($catmask = $Bits{$word}) {
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$mask |= $catmask ;
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$mask |= $DeadBits{$word} if $fatal ;
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}
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else
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{ croak("unknown warnings category '$word'")}
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}
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return $mask ;
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}
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sub import {
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shift;
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my $mask = ${^WARNING_BITS} ;
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if (vec($mask, $Offsets{'all'}, 1)) {
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$mask |= $Bits{'all'} ;
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$mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1);
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}
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${^WARNING_BITS} = $mask | bits(@_ ? @_ : 'all') ;
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}
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sub unimport {
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shift;
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my $mask = ${^WARNING_BITS} ;
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if (vec($mask, $Offsets{'all'}, 1)) {
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$mask |= $Bits{'all'} ;
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$mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1);
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}
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${^WARNING_BITS} = $mask & ~ (bits(@_ ? @_ : 'all') | $All) ;
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}
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sub __chk
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{
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my $category ;
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my $offset ;
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my $isobj = 0 ;
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if (@_) {
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# check the category supplied.
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$category = shift ;
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if (ref $category) {
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croak ("not an object")
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if $category !~ /^([^=]+)=/ ;+
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$category = $1 ;
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$isobj = 1 ;
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}
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$offset = $Offsets{$category};
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croak("unknown warnings category '$category'")
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unless defined $offset;
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}
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else {
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$category = (caller(1))[0] ;
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$offset = $Offsets{$category};
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croak("package '$category' not registered for warnings")
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unless defined $offset ;
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}
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my $this_pkg = (caller(1))[0] ;
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my $i = 2 ;
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my $pkg ;
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if ($isobj) {
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while (do { { package DB; $pkg = (caller($i++))[0] } } ) {
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last unless @DB::args && $DB::args[0] =~ /^$category=/ ;
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}
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$i -= 2 ;
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}
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else {
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for ($i = 2 ; $pkg = (caller($i))[0] ; ++ $i) {
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last if $pkg ne $this_pkg ;
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}
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$i = 2
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if !$pkg || $pkg eq $this_pkg ;
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}
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my $callers_bitmask = (caller($i))[9] ;
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return ($callers_bitmask, $offset, $i) ;
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}
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sub enabled
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{
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croak("Usage: warnings::enabled([category])")
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unless @_ == 1 || @_ == 0 ;
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my ($callers_bitmask, $offset, $i) = __chk(@_) ;
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return 0 unless defined $callers_bitmask ;
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return vec($callers_bitmask, $offset, 1) ||
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vec($callers_bitmask, $Offsets{'all'}, 1) ;
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}
|
|
|
|
|
|
sub warn
|
|
{
|
|
croak("Usage: warnings::warn([category,] 'message')")
|
|
unless @_ == 2 || @_ == 1 ;
|
|
|
|
my $message = pop ;
|
|
my ($callers_bitmask, $offset, $i) = __chk(@_) ;
|
|
local $Carp::CarpLevel = $i ;
|
|
croak($message)
|
|
if vec($callers_bitmask, $offset+1, 1) ||
|
|
vec($callers_bitmask, $Offsets{'all'}+1, 1) ;
|
|
carp($message) ;
|
|
}
|
|
|
|
sub warnif
|
|
{
|
|
croak("Usage: warnings::warnif([category,] 'message')")
|
|
unless @_ == 2 || @_ == 1 ;
|
|
|
|
my $message = pop ;
|
|
my ($callers_bitmask, $offset, $i) = __chk(@_) ;
|
|
local $Carp::CarpLevel = $i ;
|
|
|
|
return
|
|
unless defined $callers_bitmask &&
|
|
(vec($callers_bitmask, $offset, 1) ||
|
|
vec($callers_bitmask, $Offsets{'all'}, 1)) ;
|
|
|
|
croak($message)
|
|
if vec($callers_bitmask, $offset+1, 1) ||
|
|
vec($callers_bitmask, $Offsets{'all'}+1, 1) ;
|
|
|
|
carp($message) ;
|
|
}
|
|
1;
|