#!/usr/bin/perl $VERSION = '1.02'; BEGIN { push @INC, './lib'; } use strict ; sub DEFAULT_ON () { 1 } sub DEFAULT_OFF () { 2 } my $tree = { 'all' => [ 5.008, { 'io' => [ 5.008, { 'pipe' => [ 5.008, DEFAULT_OFF], 'unopened' => [ 5.008, DEFAULT_OFF], 'closed' => [ 5.008, DEFAULT_OFF], 'newline' => [ 5.008, DEFAULT_OFF], 'exec' => [ 5.008, DEFAULT_OFF], 'layer' => [ 5.008, DEFAULT_OFF], }], 'syntax' => [ 5.008, { 'ambiguous' => [ 5.008, DEFAULT_OFF], 'semicolon' => [ 5.008, DEFAULT_OFF], 'precedence' => [ 5.008, DEFAULT_OFF], 'bareword' => [ 5.008, DEFAULT_OFF], 'reserved' => [ 5.008, DEFAULT_OFF], 'digit' => [ 5.008, DEFAULT_OFF], 'parenthesis' => [ 5.008, DEFAULT_OFF], 'printf' => [ 5.008, DEFAULT_OFF], 'prototype' => [ 5.008, DEFAULT_OFF], 'qw' => [ 5.008, DEFAULT_OFF], }], 'severe' => [ 5.008, { 'inplace' => [ 5.008, DEFAULT_ON], 'internal' => [ 5.008, DEFAULT_ON], 'debugging' => [ 5.008, DEFAULT_ON], 'malloc' => [ 5.008, DEFAULT_ON], }], 'deprecated' => [ 5.008, DEFAULT_OFF], 'void' => [ 5.008, DEFAULT_OFF], 'recursion' => [ 5.008, DEFAULT_OFF], 'redefine' => [ 5.008, DEFAULT_OFF], 'numeric' => [ 5.008, DEFAULT_OFF], 'uninitialized' => [ 5.008, DEFAULT_OFF], 'once' => [ 5.008, DEFAULT_OFF], 'misc' => [ 5.008, DEFAULT_OFF], 'regexp' => [ 5.008, DEFAULT_OFF], 'glob' => [ 5.008, DEFAULT_OFF], 'y2k' => [ 5.008, DEFAULT_OFF], 'untie' => [ 5.008, DEFAULT_OFF], 'substr' => [ 5.008, DEFAULT_OFF], 'taint' => [ 5.008, DEFAULT_OFF], 'signal' => [ 5.008, DEFAULT_OFF], 'closure' => [ 5.008, DEFAULT_OFF], 'overflow' => [ 5.008, DEFAULT_OFF], 'portable' => [ 5.008, DEFAULT_OFF], 'utf8' => [ 5.008, DEFAULT_OFF], 'exiting' => [ 5.008, DEFAULT_OFF], 'pack' => [ 5.008, DEFAULT_OFF], 'unpack' => [ 5.008, DEFAULT_OFF], 'threads' => [ 5.008, DEFAULT_OFF], #'default' => [ 5.008, DEFAULT_ON ], }], } ; ########################################################################### sub tab { my($l, $t) = @_; $t .= "\t" x ($l - (length($t) + 1) / 8); $t; } ########################################################################### my %list ; my %Value ; my %ValueToName ; my %NameToValue ; my $index ; my %v_list = () ; sub valueWalk { my $tre = shift ; my @list = () ; my ($k, $v) ; foreach $k (sort keys %$tre) { $v = $tre->{$k}; die "duplicate key $k\n" if defined $list{$k} ; die "Value associated with key '$k' is not an ARRAY reference" if !ref $v || ref $v ne 'ARRAY' ; my ($ver, $rest) = @{ $v } ; push @{ $v_list{$ver} }, $k; if (ref $rest) { valueWalk ($rest) } } } sub orderValues { my $index = 0; foreach my $ver ( sort { $a <=> $b } keys %v_list ) { foreach my $name (@{ $v_list{$ver} } ) { $ValueToName{ $index } = [ uc $name, $ver ] ; $NameToValue{ uc $name } = $index ++ ; } } return $index ; } ########################################################################### sub walk { my $tre = shift ; my @list = () ; my ($k, $v) ; foreach $k (sort keys %$tre) { $v = $tre->{$k}; die "duplicate key $k\n" if defined $list{$k} ; #$Value{$index} = uc $k ; die "Can't find key '$k'" if ! defined $NameToValue{uc $k} ; push @{ $list{$k} }, $NameToValue{uc $k} ; die "Value associated with key '$k' is not an ARRAY reference" if !ref $v || ref $v ne 'ARRAY' ; my ($ver, $rest) = @{ $v } ; if (ref $rest) { push (@{ $list{$k} }, walk ($rest)) } push @list, @{ $list{$k} } ; } return @list ; } ########################################################################### sub mkRange { my @a = @_ ; my @out = @a ; my $i ; for ($i = 1 ; $i < @a; ++ $i) { $out[$i] = ".." if $a[$i] == $a[$i - 1] + 1 && $a[$i] + 1 == $a[$i + 1] ; } my $out = join(",",@out); $out =~ s/,(\.\.,)+/../g ; return $out; } ########################################################################### sub printTree { my $tre = shift ; my $prefix = shift ; my ($k, $v) ; my $max = (sort {$a <=> $b} map { length $_ } keys %$tre)[-1] ; my @keys = sort keys %$tre ; while ($k = shift @keys) { $v = $tre->{$k}; die "Value associated with key '$k' is not an ARRAY reference" if !ref $v || ref $v ne 'ARRAY' ; my $offset ; if ($tre ne $tree) { print $prefix . "|\n" ; print $prefix . "+- $k" ; $offset = ' ' x ($max + 4) ; } else { print $prefix . "$k" ; $offset = ' ' x ($max + 1) ; } my ($ver, $rest) = @{ $v } ; if (ref $rest) { my $bar = @keys ? "|" : " "; print " -" . "-" x ($max - length $k ) . "+\n" ; printTree ($rest, $prefix . $bar . $offset ) } else { print "\n" } } } ########################################################################### sub mkHexOct { my ($f, $max, @a) = @_ ; my $mask = "\x00" x $max ; my $string = "" ; foreach (@a) { vec($mask, $_, 1) = 1 ; } foreach (unpack("C*", $mask)) { if ($f eq 'x') { $string .= '\x' . sprintf("%2.2x", $_) } else { $string .= '\\' . sprintf("%o", $_) } } return $string ; } sub mkHex { my($max, @a) = @_; return mkHexOct("x", $max, @a); } sub mkOct { my($max, @a) = @_; return mkHexOct("o", $max, @a); } ########################################################################### if (@ARGV && $ARGV[0] eq "tree") { printTree($tree, " ") ; exit ; } unlink "warnings.h"; unlink "lib/warnings.pm"; open(WARN, ">warnings.h") || die "Can't create warnings.h: $!\n"; open(PM, ">lib/warnings.pm") || die "Can't create lib/warnings.pm: $!\n"; print WARN <<'EOM' ; /* !!!!!!! DO NOT EDIT THIS FILE !!!!!!! This file is built by warnings.pl Any changes made here will be lost! */ #define Off(x) ((x) / 8) #define Bit(x) (1 << ((x) % 8)) #define IsSet(a, x) ((a)[Off(x)] & Bit(x)) #define G_WARN_OFF 0 /* $^W == 0 */ #define G_WARN_ON 1 /* -w flag and $^W != 0 */ #define G_WARN_ALL_ON 2 /* -W flag */ #define G_WARN_ALL_OFF 4 /* -X flag */ #define G_WARN_ONCE 8 /* set if 'once' ever enabled */ #define G_WARN_ALL_MASK (G_WARN_ALL_ON|G_WARN_ALL_OFF) #define pWARN_STD Nullsv #define pWARN_ALL (Nullsv+1) /* use warnings 'all' */ #define pWARN_NONE (Nullsv+2) /* no warnings 'all' */ #define specialWARN(x) ((x) == pWARN_STD || (x) == pWARN_ALL || \ (x) == pWARN_NONE) EOM my $offset = 0 ; $index = $offset ; #@{ $list{"all"} } = walk ($tree) ; valueWalk ($tree) ; my $index = orderValues(); die < 255 ; Too many warnings categories -- max is 255 rewrite packWARN* & unpackWARN* macros EOM walk ($tree) ; $index *= 2 ; my $warn_size = int($index / 8) + ($index % 8 != 0) ; my $k ; my $last_ver = 0; foreach $k (sort { $a <=> $b } keys %ValueToName) { my ($name, $version) = @{ $ValueToName{$k} }; print WARN "\n/* Warnings Categories added in Perl $version */\n\n" if $last_ver != $version ; print WARN tab(5, "#define WARN_$name"), "$k\n" ; $last_ver = $version ; } print WARN "\n" ; print WARN tab(5, '#define WARNsize'), "$warn_size\n" ; #print WARN tab(5, '#define WARN_ALLstring'), '"', ('\377' x $warn_size) , "\"\n" ; print WARN tab(5, '#define WARN_ALLstring'), '"', ('\125' x $warn_size) , "\"\n" ; print WARN tab(5, '#define WARN_NONEstring'), '"', ('\0' x $warn_size) , "\"\n" ; my $WARN_TAINTstring = mkOct($warn_size, map $_ * 2, @{ $list{'taint'} }); print WARN tab(5, '#define WARN_TAINTstring'), qq["$WARN_TAINTstring"\n] ; print WARN <<'EOM'; #define isLEXWARN_on (PL_curcop->cop_warnings != pWARN_STD) #define isLEXWARN_off (PL_curcop->cop_warnings == pWARN_STD) #define isWARN_ONCE (PL_dowarn & (G_WARN_ON|G_WARN_ONCE)) #define isWARN_on(c,x) (IsSet(SvPVX(c), 2*(x))) #define isWARNf_on(c,x) (IsSet(SvPVX(c), 2*(x)+1)) #define ckWARN(x) \ ( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \ (PL_curcop->cop_warnings == pWARN_ALL || \ isWARN_on(PL_curcop->cop_warnings, x) ) ) \ || (isLEXWARN_off && PL_dowarn & G_WARN_ON) ) #define ckWARN2(x,y) \ ( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \ (PL_curcop->cop_warnings == pWARN_ALL || \ isWARN_on(PL_curcop->cop_warnings, x) || \ isWARN_on(PL_curcop->cop_warnings, y) ) ) \ || (isLEXWARN_off && PL_dowarn & G_WARN_ON) ) #define ckWARN3(x,y,z) \ ( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \ (PL_curcop->cop_warnings == pWARN_ALL || \ isWARN_on(PL_curcop->cop_warnings, x) || \ isWARN_on(PL_curcop->cop_warnings, y) || \ isWARN_on(PL_curcop->cop_warnings, z) ) ) \ || (isLEXWARN_off && PL_dowarn & G_WARN_ON) ) #define ckWARN4(x,y,z,t) \ ( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \ (PL_curcop->cop_warnings == pWARN_ALL || \ isWARN_on(PL_curcop->cop_warnings, x) || \ isWARN_on(PL_curcop->cop_warnings, y) || \ isWARN_on(PL_curcop->cop_warnings, z) || \ isWARN_on(PL_curcop->cop_warnings, t) ) ) \ || (isLEXWARN_off && PL_dowarn & G_WARN_ON) ) #define ckWARN_d(x) \ (isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \ (PL_curcop->cop_warnings != pWARN_NONE && \ isWARN_on(PL_curcop->cop_warnings, x) ) ) #define ckWARN2_d(x,y) \ (isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \ (PL_curcop->cop_warnings != pWARN_NONE && \ (isWARN_on(PL_curcop->cop_warnings, x) || \ isWARN_on(PL_curcop->cop_warnings, y) ) ) ) #define ckWARN3_d(x,y,z) \ (isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \ (PL_curcop->cop_warnings != pWARN_NONE && \ (isWARN_on(PL_curcop->cop_warnings, x) || \ isWARN_on(PL_curcop->cop_warnings, y) || \ isWARN_on(PL_curcop->cop_warnings, z) ) ) ) #define ckWARN4_d(x,y,z,t) \ (isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \ (PL_curcop->cop_warnings != pWARN_NONE && \ (isWARN_on(PL_curcop->cop_warnings, x) || \ isWARN_on(PL_curcop->cop_warnings, y) || \ isWARN_on(PL_curcop->cop_warnings, z) || \ isWARN_on(PL_curcop->cop_warnings, t) ) ) ) #define packWARN(a) (a ) #define packWARN2(a,b) ((a) | (b)<<8 ) #define packWARN3(a,b,c) ((a) | (b)<<8 | (c) <<16 ) #define packWARN4(a,b,c,d) ((a) | (b)<<8 | (c) <<16 | (d) <<24) #define unpackWARN1(x) ((x) & 0xFF) #define unpackWARN2(x) (((x) >>8) & 0xFF) #define unpackWARN3(x) (((x) >>16) & 0xFF) #define unpackWARN4(x) (((x) >>24) & 0xFF) #define ckDEAD(x) \ ( ! specialWARN(PL_curcop->cop_warnings) && \ ( isWARNf_on(PL_curcop->cop_warnings, WARN_ALL) || \ isWARNf_on(PL_curcop->cop_warnings, unpackWARN1(x)) || \ isWARNf_on(PL_curcop->cop_warnings, unpackWARN2(x)) || \ isWARNf_on(PL_curcop->cop_warnings, unpackWARN3(x)) || \ isWARNf_on(PL_curcop->cop_warnings, unpackWARN4(x)))) /* end of file warnings.h */ EOM close WARN ; while () { last if /^KEYWORDS$/ ; print PM $_ ; } #$list{'all'} = [ $offset .. 8 * ($warn_size/2) - 1 ] ; $last_ver = 0; print PM "our %Offsets = (\n" ; foreach my $k (sort { $a <=> $b } keys %ValueToName) { my ($name, $version) = @{ $ValueToName{$k} }; $name = lc $name; $k *= 2 ; if ( $last_ver != $version ) { print PM "\n"; print PM tab(4, " # Warnings Categories added in Perl $version"); print PM "\n\n"; } print PM tab(4, " '$name'"), "=> $k,\n" ; $last_ver = $version; } print PM " );\n\n" ; print PM "our %Bits = (\n" ; foreach $k (sort keys %list) { my $v = $list{$k} ; my @list = sort { $a <=> $b } @$v ; print PM tab(4, " '$k'"), '=> "', # mkHex($warn_size, @list), mkHex($warn_size, map $_ * 2 , @list), '", # [', mkRange(@list), "]\n" ; } print PM " );\n\n" ; print PM "our %DeadBits = (\n" ; foreach $k (sort keys %list) { my $v = $list{$k} ; my @list = sort { $a <=> $b } @$v ; print PM tab(4, " '$k'"), '=> "', # mkHex($warn_size, @list), mkHex($warn_size, map $_ * 2 + 1 , @list), '", # [', mkRange(@list), "]\n" ; } print PM " );\n\n" ; print PM '$NONE = "', ('\0' x $warn_size) , "\";\n" ; print PM '$LAST_BIT = ' . "$index ;\n" ; print PM '$BYTES = ' . "$warn_size ;\n" ; while () { print PM $_ ; } close PM ; __END__ # !!!!!!! DO NOT EDIT THIS FILE !!!!!!! # This file was created by warnings.pl # Any changes made here will be lost. # package warnings; our $VERSION = '1.03'; =head1 NAME warnings - Perl pragma to control optional warnings =head1 SYNOPSIS use warnings; no warnings; use warnings "all"; no warnings "all"; use warnings::register; if (warnings::enabled()) { warnings::warn("some warning"); } if (warnings::enabled("void")) { warnings::warn("void", "some warning"); } if (warnings::enabled($object)) { warnings::warn($object, "some warning"); } warnings::warnif("some warning"); warnings::warnif("void", "some warning"); warnings::warnif($object, "some warning"); =head1 DESCRIPTION The C pragma is a replacement for the command line flag C<-w>, but the pragma is limited to the enclosing block, while the flag is global. See L for more information. If no import list is supplied, all possible warnings are either enabled or disabled. A number of functions are provided to assist module authors. =over 4 =item use warnings::register Creates a new warnings category with the same name as the package where the call to the pragma is used. =item warnings::enabled() Use the warnings category with the same name as the current package. Return TRUE if that warnings category is enabled in the calling module. Otherwise returns FALSE. =item warnings::enabled($category) Return TRUE if the warnings category, C<$category>, is enabled in the calling module. Otherwise returns FALSE. =item warnings::enabled($object) Use the name of the class for the object reference, C<$object>, as the warnings category. Return TRUE if that warnings category is enabled in the first scope where the object is used. Otherwise returns FALSE. =item warnings::warn($message) Print C<$message> to STDERR. Use the warnings category with the same name as the current package. If that warnings category has been set to "FATAL" in the calling module then die. Otherwise return. =item warnings::warn($category, $message) Print C<$message> to STDERR. If the warnings category, C<$category>, has been set to "FATAL" in the calling module then die. Otherwise return. =item warnings::warn($object, $message) Print C<$message> to STDERR. Use the name of the class for the object reference, C<$object>, as the warnings category. If that warnings category has been set to "FATAL" in the scope where C<$object> is first used then die. Otherwise return. =item warnings::warnif($message) Equivalent to: if (warnings::enabled()) { warnings::warn($message) } =item warnings::warnif($category, $message) Equivalent to: if (warnings::enabled($category)) { warnings::warn($category, $message) } =item warnings::warnif($object, $message) Equivalent to: if (warnings::enabled($object)) { warnings::warn($object, $message) } =back See L and L. =cut use Carp (); KEYWORDS $All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ; sub Croaker { delete $Carp::CarpInternal{'warnings'}; Carp::croak(@_); } sub bits { # called from B::Deparse.pm push @_, 'all' unless @_; my $mask; my $catmask ; my $fatal = 0 ; my $no_fatal = 0 ; foreach my $word ( @_ ) { if ($word eq 'FATAL') { $fatal = 1; $no_fatal = 0; } elsif ($word eq 'NONFATAL') { $fatal = 0; $no_fatal = 1; } elsif ($catmask = $Bits{$word}) { $mask |= $catmask ; $mask |= $DeadBits{$word} if $fatal ; $mask &= ~($DeadBits{$word}|$All) if $no_fatal ; } else { Croaker("Unknown warnings category '$word'")} } return $mask ; } sub import { shift; my $catmask ; my $fatal = 0 ; my $no_fatal = 0 ; my $mask = ${^WARNING_BITS} ; if (vec($mask, $Offsets{'all'}, 1)) { $mask |= $Bits{'all'} ; $mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1); } push @_, 'all' unless @_; foreach my $word ( @_ ) { if ($word eq 'FATAL') { $fatal = 1; $no_fatal = 0; } elsif ($word eq 'NONFATAL') { $fatal = 0; $no_fatal = 1; } elsif ($catmask = $Bits{$word}) { $mask |= $catmask ; $mask |= $DeadBits{$word} if $fatal ; $mask &= ~($DeadBits{$word}|$All) if $no_fatal ; } else { Croaker("Unknown warnings category '$word'")} } ${^WARNING_BITS} = $mask ; } sub unimport { shift; my $catmask ; my $mask = ${^WARNING_BITS} ; if (vec($mask, $Offsets{'all'}, 1)) { $mask |= $Bits{'all'} ; $mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1); } push @_, 'all' unless @_; foreach my $word ( @_ ) { if ($word eq 'FATAL') { next; } elsif ($catmask = $Bits{$word}) { $mask &= ~($catmask | $DeadBits{$word} | $All); } else { Croaker("Unknown warnings category '$word'")} } ${^WARNING_BITS} = $mask ; } sub __chk { my $category ; my $offset ; my $isobj = 0 ; if (@_) { # check the category supplied. $category = shift ; if (ref $category) { Croaker ("not an object") if $category !~ /^([^=]+)=/ ; $category = $1 ; $isobj = 1 ; } $offset = $Offsets{$category}; Croaker("Unknown warnings category '$category'") unless defined $offset; } else { $category = (caller(1))[0] ; $offset = $Offsets{$category}; Croaker("package '$category' not registered for warnings") unless defined $offset ; } my $this_pkg = (caller(1))[0] ; my $i = 2 ; my $pkg ; if ($isobj) { while (do { { package DB; $pkg = (caller($i++))[0] } } ) { last unless @DB::args && $DB::args[0] =~ /^$category=/ ; } $i -= 2 ; } else { for ($i = 2 ; $pkg = (caller($i))[0] ; ++ $i) { last if $pkg ne $this_pkg ; } $i = 2 if !$pkg || $pkg eq $this_pkg ; } my $callers_bitmask = (caller($i))[9] ; return ($callers_bitmask, $offset, $i) ; } sub enabled { Croaker("Usage: warnings::enabled([category])") unless @_ == 1 || @_ == 0 ; my ($callers_bitmask, $offset, $i) = __chk(@_) ; return 0 unless defined $callers_bitmask ; return vec($callers_bitmask, $offset, 1) || vec($callers_bitmask, $Offsets{'all'}, 1) ; } sub warn { Croaker("Usage: warnings::warn([category,] 'message')") unless @_ == 2 || @_ == 1 ; my $message = pop ; my ($callers_bitmask, $offset, $i) = __chk(@_) ; Carp::croak($message) if vec($callers_bitmask, $offset+1, 1) || vec($callers_bitmask, $Offsets{'all'}+1, 1) ; Carp::carp($message) ; } sub warnif { Croaker("Usage: warnings::warnif([category,] 'message')") unless @_ == 2 || @_ == 1 ; my $message = pop ; my ($callers_bitmask, $offset, $i) = __chk(@_) ; return unless defined $callers_bitmask && (vec($callers_bitmask, $offset, 1) || vec($callers_bitmask, $Offsets{'all'}, 1)) ; Carp::croak($message) if vec($callers_bitmask, $offset+1, 1) || vec($callers_bitmask, $Offsets{'all'}+1, 1) ; Carp::carp($message) ; } 1;