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executable file 590 lines (451 sloc) 14.114 kB
#!/usr/bin/perl
BEGIN {
push @INC, './lib';
}
use strict ;
sub DEFAULT_ON () { 1 }
sub DEFAULT_OFF () { 2 }
my $tree = {
'all' => {
'io' => { 'pipe' => DEFAULT_OFF,
'unopened' => DEFAULT_OFF,
'closed' => DEFAULT_OFF,
'newline' => DEFAULT_OFF,
'exec' => DEFAULT_OFF,
},
'syntax' => { 'ambiguous' => DEFAULT_OFF,
'semicolon' => DEFAULT_OFF,
'precedence' => DEFAULT_OFF,
'bareword' => DEFAULT_OFF,
'reserved' => DEFAULT_OFF,
'digit' => DEFAULT_OFF,
'parenthesis' => DEFAULT_OFF,
'deprecated' => DEFAULT_OFF,
'printf' => DEFAULT_OFF,
'prototype' => DEFAULT_OFF,
'qw' => DEFAULT_OFF,
},
'severe' => { 'inplace' => DEFAULT_ON,
'internal' => DEFAULT_ON,
'debugging' => DEFAULT_ON,
'malloc' => DEFAULT_ON,
},
'void' => DEFAULT_OFF,
'recursion' => DEFAULT_OFF,
'redefine' => DEFAULT_OFF,
'numeric' => DEFAULT_OFF,
'uninitialized' => DEFAULT_OFF,
'once' => DEFAULT_OFF,
'misc' => DEFAULT_OFF,
'regexp' => DEFAULT_OFF,
'glob' => DEFAULT_OFF,
'y2k' => DEFAULT_OFF,
'chmod' => DEFAULT_OFF,
'umask' => DEFAULT_OFF,
'untie' => DEFAULT_OFF,
'substr' => DEFAULT_OFF,
'taint' => DEFAULT_OFF,
'signal' => DEFAULT_OFF,
'closure' => DEFAULT_OFF,
'overflow' => DEFAULT_OFF,
'portable' => DEFAULT_OFF,
'utf8' => DEFAULT_OFF,
'exiting' => DEFAULT_OFF,
'pack' => DEFAULT_OFF,
'unpack' => DEFAULT_OFF,
#'default' => DEFAULT_ON,
}
} ;
###########################################################################
sub tab {
my($l, $t) = @_;
$t .= "\t" x ($l - (length($t) + 1) / 8);
$t;
}
###########################################################################
my %list ;
my %Value ;
my $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 ;
push @{ $list{$k} }, $index ++ ;
if (ref $v)
{ push (@{ $list{$k} }, walk ($v)) }
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 $indent = shift ;
my ($k, $v) ;
my $max = (sort {$a <=> $b} map { length $_ } keys %$tre)[-1] ;
$prefix .= " " x $indent ;
foreach $k (sort keys %$tre) {
$v = $tre->{$k};
print $prefix . "|\n" ;
print $prefix . "+- $k" ;
if (ref $v)
{
print " " . "-" x ($max - length $k ) . "+\n" ;
printTree ($v, $prefix . "|" , $max + $indent - 1)
}
else
{ print "\n" }
}
}
###########################################################################
sub mkHex
{
my ($max, @a) = @_ ;
my $mask = "\x00" x $max ;
my $string = "" ;
foreach (@a) {
vec($mask, $_, 1) = 1 ;
}
#$string = unpack("H$max", $mask) ;
#$string =~ s/(..)/\x$1/g;
foreach (unpack("C*", $mask)) {
$string .= '\x' . sprintf("%2.2x", $_) ;
}
return $string ;
}
###########################################################################
if (@ARGV && $ARGV[0] eq "tree")
{
#print " all -+\n" ;
printTree($tree, " ", 4) ;
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) ;
walk ($tree) ;
$index *= 2 ;
my $warn_size = int($index / 8) + ($index % 8 != 0) ;
my $k ;
foreach $k (sort { $a <=> $b } keys %Value) {
print WARN tab(5, "#define WARN_$Value{$k}"), "$k\n" ;
}
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 $warn_size) , "\"\n" ;
print WARN <<'EOM';
#define isLEXWARN_on (PL_curcop->cop_warnings != pWARN_STD)
#define isLEXWARN_off (PL_curcop->cop_warnings == pWARN_STD)
#define isWARN_ONCE (PL_dowarn & (G_WARN_ON|G_WARN_ONCE))
#define isWARN_on(c,x) (IsSet(SvPVX(c), 2*(x)))
#define isWARNf_on(c,x) (IsSet(SvPVX(c), 2*(x)+1))
#define ckDEAD(x) \
( ! specialWARN(PL_curcop->cop_warnings) && \
( isWARNf_on(PL_curcop->cop_warnings, WARN_ALL) || \
isWARNf_on(PL_curcop->cop_warnings, x)))
#define ckWARN(x) \
( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \
(PL_curcop->cop_warnings == pWARN_ALL || \
isWARN_on(PL_curcop->cop_warnings, x) ) ) \
|| (isLEXWARN_off && PL_dowarn & G_WARN_ON) )
#define ckWARN2(x,y) \
( (isLEXWARN_on && PL_curcop->cop_warnings != pWARN_NONE && \
(PL_curcop->cop_warnings == pWARN_ALL || \
isWARN_on(PL_curcop->cop_warnings, x) || \
isWARN_on(PL_curcop->cop_warnings, y) ) ) \
|| (isLEXWARN_off && PL_dowarn & G_WARN_ON) )
#define ckWARN_d(x) \
(isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \
(PL_curcop->cop_warnings != pWARN_NONE && \
isWARN_on(PL_curcop->cop_warnings, x) ) )
#define ckWARN2_d(x,y) \
(isLEXWARN_off || PL_curcop->cop_warnings == pWARN_ALL || \
(PL_curcop->cop_warnings != pWARN_NONE && \
(isWARN_on(PL_curcop->cop_warnings, x) || \
isWARN_on(PL_curcop->cop_warnings, y) ) ) )
/* end of file warnings.h */
EOM
close WARN ;
while (<DATA>) {
last if /^KEYWORDS$/ ;
print PM $_ ;
}
#$list{'all'} = [ $offset .. 8 * ($warn_size/2) - 1 ] ;
#my %Keys = map {lc $Value{$_}, $_} keys %Value ;
print PM "%Offsets = (\n" ;
foreach my $k (sort { $a <=> $b } keys %Value) {
my $v = lc $Value{$k} ;
$k *= 2 ;
print PM tab(4, " '$v'"), "=> $k,\n" ;
}
print PM " );\n\n" ;
print PM "%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 "%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 (<DATA>) {
print PM $_ ;
}
close PM ;
__END__
# This file was created by warnings.pl
# Any changes made here will be lost.
#
package warnings;
=head1 NAME
warnings - Perl pragma to control optional warnings
=head1 SYNOPSIS
use warnings;
no warnings;
use warnings "all";
no warnings "all";
use warnings::register;
if (warnings::enabled()) {
warnings::warn("some warning");
}
if (warnings::enabled("void")) {
warnings::warn("void", "some warning");
}
if (warnings::enabled($object)) {
warnings::warn($object, "some warning");
}
warnif("some warning");
warnif("void", "some warning");
warnif($object, "some warning");
=head1 DESCRIPTION
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<perlmodlib/Pragmatic Modules> and L<perllexwarn>.
=cut
use Carp ;
KEYWORDS
$All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ;
sub bits {
my $mask ;
my $catmask ;
my $fatal = 0 ;
foreach my $word (@_) {
if ($word eq 'FATAL') {
$fatal = 1;
}
elsif ($catmask = $Bits{$word}) {
$mask |= $catmask ;
$mask |= $DeadBits{$word} if $fatal ;
}
else
{ croak("unknown warnings category '$word'")}
}
return $mask ;
}
sub import {
shift;
my $mask = ${^WARNING_BITS} ;
if (vec($mask, $Offsets{'all'}, 1)) {
$mask |= $Bits{'all'} ;
$mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1);
}
${^WARNING_BITS} = $mask | bits(@_ ? @_ : 'all') ;
}
sub unimport {
shift;
my $mask = ${^WARNING_BITS} ;
if (vec($mask, $Offsets{'all'}, 1)) {
$mask |= $Bits{'all'} ;
$mask |= $DeadBits{'all'} if vec($mask, $Offsets{'all'}+1, 1);
}
${^WARNING_BITS} = $mask & ~ (bits(@_ ? @_ : 'all') | $All) ;
}
sub __chk
{
my $category ;
my $offset ;
my $isobj = 0 ;
if (@_) {
# check the category supplied.
$category = shift ;
if (ref $category) {
croak ("not an object")
if $category !~ /^([^=]+)=/ ;+
$category = $1 ;
$isobj = 1 ;
}
$offset = $Offsets{$category};
croak("unknown warnings category '$category'")
unless defined $offset;
}
else {
$category = (caller(1))[0] ;
$offset = $Offsets{$category};
croak("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, $i) ;
}
sub enabled
{
croak("Usage: warnings::enabled([category])")
unless @_ == 1 || @_ == 0 ;
my ($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
{
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;
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