[perl5.git] / warnings.pl

#!/usr/bin/perl

BEGIN {
  push @INC, './lib';
}
use strict ;

sub DEFAULT_ON  () { 1 }
sub DEFAULT_OFF () { 2 }

my $tree = {
       	 'unsafe'	=> { 	'untie'		=> DEFAULT_OFF,
				'substr'	=> DEFAULT_OFF,
				'taint'		=> DEFAULT_OFF,
				'signal'	=> DEFAULT_OFF,
				'closure'	=> DEFAULT_OFF,
				'overflow'	=> DEFAULT_OFF,
				'portable'	=> DEFAULT_OFF,
				'utf8'		=> DEFAULT_OFF,
			   } ,
       	 'io'  		=> { 	'pipe' 		=> DEFAULT_OFF,
       				'unopened'	=> DEFAULT_OFF,
       				'closed'	=> DEFAULT_OFF,
       				'newline'	=> DEFAULT_OFF,
       				'exec'		=> DEFAULT_OFF,
       				#'wr in in file'=> DEFAULT_OFF,
			   },
       	 'syntax'	=> { 	'ambiguous'	=> DEFAULT_OFF,
			     	'semicolon'	=> DEFAULT_OFF,
			     	'precedence'	=> DEFAULT_OFF,
			     	'reserved'	=> DEFAULT_OFF,
				'octal'		=> DEFAULT_OFF,
				'digit'		=> DEFAULT_OFF,
			     	'parenthesis'	=> DEFAULT_OFF,
       	 			'deprecated'	=> DEFAULT_OFF,
       	 			'printf'	=> DEFAULT_OFF,
			   },
       	 'severe'	=> { 	'inplace'	=> DEFAULT_ON,
	 			'internal'	=> DEFAULT_ON,
         			'debugging'	=> DEFAULT_ON,
	 		   },
       	 'void'		=> DEFAULT_OFF,
       	 'recursion'	=> DEFAULT_OFF,
       	 'redefine'	=> DEFAULT_OFF,
       	 'numeric'	=> DEFAULT_OFF,
         'uninitialized'=> DEFAULT_OFF,
       	 'once'		=> DEFAULT_OFF,
       	 'misc'		=> 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 = 0 ;

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 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 ;
}

###########################################################################


#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 WARN_STD		Nullsv
#define WARN_ALL		(&PL_sv_yes)	/* use warnings 'all' */
#define WARN_NONE		(&PL_sv_no)	/* no  warnings 'all' */

#define specialWARN(x)		((x) == WARN_STD || (x) == WARN_ALL ||	\
				 (x) == WARN_NONE)

#define ckDEAD(x)							\
	   ( ! specialWARN(PL_curcop->cop_warnings) &&			\
	    IsSet(SvPVX(PL_curcop->cop_warnings), 2*x+1))

#define ckWARN(x)							\
	( (PL_curcop->cop_warnings != WARN_STD &&			\
	   PL_curcop->cop_warnings != WARN_NONE &&			\
	      (PL_curcop->cop_warnings == WARN_ALL ||			\
	       IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) ) )		\
	  || (PL_curcop->cop_warnings == WARN_STD && PL_dowarn & G_WARN_ON) )

#define ckWARN2(x,y)							\
	  ( (PL_curcop->cop_warnings != WARN_STD  &&			\
	     PL_curcop->cop_warnings != WARN_NONE &&			\
	      (PL_curcop->cop_warnings == WARN_ALL ||			\
	        IsSet(SvPVX(PL_curcop->cop_warnings), 2*x)  ||		\
	        IsSet(SvPVX(PL_curcop->cop_warnings), 2*y) ) ) 		\
	    ||	(PL_curcop->cop_warnings == WARN_STD && PL_dowarn & G_WARN_ON) )

#define ckWARN_d(x)							\
	  (PL_curcop->cop_warnings == WARN_STD ||			\
	   PL_curcop->cop_warnings == WARN_ALL ||			\
	     (PL_curcop->cop_warnings != WARN_NONE &&			\
	      IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) ) )

#define ckWARN2_d(x,y)							\
	  (PL_curcop->cop_warnings == WARN_STD ||			\
	   PL_curcop->cop_warnings == WARN_ALL ||			\
	     (PL_curcop->cop_warnings != WARN_NONE &&			\
	        (IsSet(SvPVX(PL_curcop->cop_warnings), 2*x)  ||		\
	         IsSet(SvPVX(PL_curcop->cop_warnings), 2*y) ) ) )


#define isLEXWARN_on 	(PL_curcop->cop_warnings != WARN_STD)
#define isLEXWARN_off	(PL_curcop->cop_warnings == WARN_STD)
#define isWARN_ONCE	(PL_dowarn & (G_WARN_ON|G_WARN_ONCE))
#define isWARN_on(c,x)	(IsSet(SvPVX(c), 2*(x)))

EOM


$index = 0 ;
@{ $list{"all"} } = walk ($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';

/* end of file warnings.h */

EOM

close WARN ;

while (<DATA>) {
    last if /^KEYWORDS$/ ;
    print PM $_ ;
}

$list{'all'} = [ 0 .. 8 * ($warn_size/2) - 1 ] ;
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" ;
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";

=head1 DESCRIPTION

If no import list is supplied, all possible warnings are either enabled
or disabled.

See L<perlmod/Pragmatic Modules> and L<perllexwarn>.


=cut

use Carp ;

KEYWORDS

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 $fatal ;
	}
	else
	  { croak "unknown warning category '$word'" }
    }

    return $mask ;
}

sub import {
    shift;
    ${^Warnings} |= bits(@_ ? @_ : 'all') ;
}

sub unimport {
    shift;
    ${^Warnings} &= ~ bits(@_ ? @_ : 'all') ;
}

sub enabled
{
    my $string = shift ;

    return 1
	if $bits{$string} && ${^Warnings} & $bits{$string} ;
   
    return 0 ; 
}

1;
Commit	Line	Data
599cee73 PM	1	#!/usr/bin/perl
599cee73 PM	2
73f0cc2d GS	3	BEGIN {
	4	push @INC, './lib';
	5	}
599cee73 PM	6	use strict ;
	7
	8	sub DEFAULT_ON () { 1 }
	9	sub DEFAULT_OFF () { 2 }
	10
	11	my $tree = {
	12	'unsafe' => { 'untie' => DEFAULT_OFF,
	13	'substr' => DEFAULT_OFF,
	14	'taint' => DEFAULT_OFF,
	15	'signal' => DEFAULT_OFF,
	16	'closure' => DEFAULT_OFF,
627300f0 JH	17	'overflow' => DEFAULT_OFF,
627300f0 JH	18	'portable' => DEFAULT_OFF,
599cee73 PM	19	'utf8' => DEFAULT_OFF,
	20	} ,
	21	'io' => { 'pipe' => DEFAULT_OFF,
	22	'unopened' => DEFAULT_OFF,
	23	'closed' => DEFAULT_OFF,
	24	'newline' => DEFAULT_OFF,
	25	'exec' => DEFAULT_OFF,
	26	#'wr in in file'=> DEFAULT_OFF,
	27	},
	28	'syntax' => { 'ambiguous' => DEFAULT_OFF,
	29	'semicolon' => DEFAULT_OFF,
	30	'precedence' => DEFAULT_OFF,
	31	'reserved' => DEFAULT_OFF,
	32	'octal' => DEFAULT_OFF,
627300f0	33	'digit' => DEFAULT_OFF,
599cee73 PM	34	'parenthesis' => DEFAULT_OFF,
	35	'deprecated' => DEFAULT_OFF,
	36	'printf' => DEFAULT_OFF,
	37	},
0453d815 PM	38	'severe' => { 'inplace' => DEFAULT_ON,
	39	'internal' => DEFAULT_ON,
	40	'debugging' => DEFAULT_ON,
	41	},
599cee73 PM	42	'void' => DEFAULT_OFF,
	43	'recursion' => DEFAULT_OFF,
	44	'redefine' => DEFAULT_OFF,
	45	'numeric' => DEFAULT_OFF,
	46	'uninitialized'=> DEFAULT_OFF,
	47	'once' => DEFAULT_OFF,
	48	'misc' => DEFAULT_OFF,
0453d815	49	#'default' => DEFAULT_ON,
599cee73 PM	50	} ;
	51
	52
	53	###########################################################################
	54	sub tab {
	55	my($l, $t) = @_;
	56	$t .= "\t" x ($l - (length($t) + 1) / 8);
	57	$t;
	58	}
	59
	60	###########################################################################
	61
	62	my %list ;
	63	my %Value ;
	64	my $index = 0 ;
	65
	66	sub walk
	67	{
	68	my $tre = shift ;
	69	my @list = () ;
	70	my ($k, $v) ;
	71
95dfd3ab GS	72	foreach $k (sort keys %$tre) {
95dfd3ab GS	73	$v = $tre->{$k};
599cee73 PM	74	die "duplicate key $k\n" if defined $list{$k} ;
	75	$Value{$index} = uc $k ;
	76	push @{ $list{$k} }, $index ++ ;
	77	if (ref $v)
	78	{ push (@{ $list{$k} }, walk ($v)) }
	79	push @list, @{ $list{$k} } ;
	80	}
	81
	82	return @list ;
599cee73 PM	83	}
	84
	85	###########################################################################
	86
	87	sub mkRange
	88	{
	89	my @a = @_ ;
	90	my @out = @a ;
	91	my $i ;
	92
	93
	94	for ($i = 1 ; $i < @a; ++ $i) {
	95	$out[$i] = ".."
	96	if $a[$i] == $a[$i - 1] + 1 && $a[$i] + 1 == $a[$i + 1] ;
	97	}
	98
	99	my $out = join(",",@out);
	100
	101	$out =~ s/,(\.\.,)+/../g ;
	102	return $out;
	103	}
	104
	105	###########################################################################
	106
	107	sub mkHex
	108	{
	109	my ($max, @a) = @_ ;
	110	my $mask = "\x00" x $max ;
	111	my $string = "" ;
	112
	113	foreach (@a) {
	114	vec($mask, $_, 1) = 1 ;
	115	}
	116
	117	#$string = unpack("H$max", $mask) ;
	118	#$string =~ s/(..)/\x$1/g;
	119	foreach (unpack("C*", $mask)) {
	120	$string .= '\x' . sprintf("%2.2x", $_) ;
	121	}
	122	return $string ;
	123	}
	124
	125	###########################################################################
	126
	127
4438c4b7 JH	128	#unlink "warnings.h";
	129	#unlink "lib/warnings.pm";
	130	open(WARN, ">warnings.h") \|\| die "Can't create warnings.h: $!\n";
	131	open(PM, ">lib/warnings.pm") \|\| die "Can't create lib/warnings.pm: $!\n";
599cee73 PM	132
	133	print WARN <<'EOM' ;
	134	/* !!!!!!! DO NOT EDIT THIS FILE !!!!!!!
4438c4b7	135	This file is built by warnings.pl
599cee73 PM	136	Any changes made here will be lost!
	137	*/
	138
	139
0453d815 PM	140	#define Off(x) ((x) / 8)
0453d815 PM	141	#define Bit(x) (1 << ((x) % 8))
599cee73 PM	142	#define IsSet(a, x) ((a)[Off(x)] & Bit(x))
599cee73 PM	143
0453d815	144
599cee73	145	#define G_WARN_OFF 0 /* $^W == 0 */
0453d815	146	#define G_WARN_ON 1 /* -w flag and $^W != 0 */
599cee73 PM	147	#define G_WARN_ALL_ON 2 /* -W flag */
599cee73 PM	148	#define G_WARN_ALL_OFF 4 /* -X flag */
0453d815	149	#define G_WARN_ONCE 8 /* set if 'once' ever enabled */
599cee73 PM	150	#define G_WARN_ALL_MASK (G_WARN_ALL_ON\|G_WARN_ALL_OFF)
599cee73 PM	151
0453d815	152	#define WARN_STD Nullsv
4438c4b7 JH	153	#define WARN_ALL (&PL_sv_yes) /* use warnings 'all' */
4438c4b7 JH	154	#define WARN_NONE (&PL_sv_no) /* no warnings 'all' */
599cee73	155
0453d815 PM	156	#define specialWARN(x) ((x) == WARN_STD \|\| (x) == WARN_ALL \|\| \
0453d815 PM	157	(x) == WARN_NONE)
599cee73 PM	158
599cee73 PM	159	#define ckDEAD(x) \
0453d815	160	( ! specialWARN(PL_curcop->cop_warnings) && \
e24b16f9	161	IsSet(SvPVX(PL_curcop->cop_warnings), 2*x+1))
599cee73 PM	162
599cee73 PM	163	#define ckWARN(x) \
0453d815 PM	164	( (PL_curcop->cop_warnings != WARN_STD && \
0453d815 PM	165	PL_curcop->cop_warnings != WARN_NONE && \
e24b16f9 GS	166	(PL_curcop->cop_warnings == WARN_ALL \|\| \
e24b16f9 GS	167	IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) ) ) \
0453d815	168	\|\| (PL_curcop->cop_warnings == WARN_STD && PL_dowarn & G_WARN_ON) )
599cee73 PM	169
599cee73 PM	170	#define ckWARN2(x,y) \
0453d815 PM	171	( (PL_curcop->cop_warnings != WARN_STD && \
0453d815 PM	172	PL_curcop->cop_warnings != WARN_NONE && \
e24b16f9 GS	173	(PL_curcop->cop_warnings == WARN_ALL \|\| \
	174	IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) \|\| \
	175	IsSet(SvPVX(PL_curcop->cop_warnings), 2*y) ) ) \
0453d815	176	\|\| (PL_curcop->cop_warnings == WARN_STD && PL_dowarn & G_WARN_ON) )
599cee73	177
0453d815 PM	178	#define ckWARN_d(x) \
	179	(PL_curcop->cop_warnings == WARN_STD \|\| \
	180	PL_curcop->cop_warnings == WARN_ALL \|\| \
	181	(PL_curcop->cop_warnings != WARN_NONE && \
	182	IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) ) )
599cee73	183
0453d815 PM	184	#define ckWARN2_d(x,y) \
	185	(PL_curcop->cop_warnings == WARN_STD \|\| \
	186	PL_curcop->cop_warnings == WARN_ALL \|\| \
	187	(PL_curcop->cop_warnings != WARN_NONE && \
	188	(IsSet(SvPVX(PL_curcop->cop_warnings), 2*x) \|\| \
	189	IsSet(SvPVX(PL_curcop->cop_warnings), 2*y) ) ) )
599cee73	190
599cee73	191
0453d815 PM	192	#define isLEXWARN_on (PL_curcop->cop_warnings != WARN_STD)
	193	#define isLEXWARN_off (PL_curcop->cop_warnings == WARN_STD)
	194	#define isWARN_ONCE (PL_dowarn & (G_WARN_ON\|G_WARN_ONCE))
	195	#define isWARN_on(c,x) (IsSet(SvPVX(c), 2*(x)))
599cee73 PM	196
	197	EOM
	198
	199
	200	$index = 0 ;
	201	@{ $list{"all"} } = walk ($tree) ;
	202
	203	$index *= 2 ;
	204	my $warn_size = int($index / 8) + ($index % 8 != 0) ;
	205
	206	my $k ;
	207	foreach $k (sort { $a <=> $b } keys %Value) {
	208	print WARN tab(5, "#define WARN_$Value{$k}"), "$k\n" ;
	209	}
	210	print WARN "\n" ;
	211
	212	print WARN tab(5, '#define WARNsize'), "$warn_size\n" ;
	213	#print WARN tab(5, '#define WARN_ALLstring'), '"', ('\377' x $warn_size) , "\"\n" ;
	214	print WARN tab(5, '#define WARN_ALLstring'), '"', ('\125' x $warn_size) , "\"\n" ;
	215	print WARN tab(5, '#define WARN_NONEstring'), '"', ('\0' x $warn_size) , "\"\n" ;
	216
	217	print WARN <<'EOM';
	218
4438c4b7	219	/* end of file warnings.h */
599cee73 PM	220
	221	EOM
	222
	223	close WARN ;
	224
	225	while (<DATA>) {
	226	last if /^KEYWORDS$/ ;
	227	print PM $_ ;
	228	}
	229
	230	$list{'all'} = [ 0 .. 8 * ($warn_size/2) - 1 ] ;
	231	print PM "%Bits = (\n" ;
	232	foreach $k (sort keys %list) {
	233
	234	my $v = $list{$k} ;
	235	my @list = sort { $a <=> $b } @$v ;
	236
	237	print PM tab(4, " '$k'"), '=> "',
	238	# mkHex($warn_size, @list),
	239	mkHex($warn_size, map $_ * 2 , @list),
	240	'", # [', mkRange(@list), "]\n" ;
	241	}
	242
	243	print PM " );\n\n" ;
	244
	245	print PM "%DeadBits = (\n" ;
	246	foreach $k (sort keys %list) {
	247
	248	my $v = $list{$k} ;
	249	my @list = sort { $a <=> $b } @$v ;
	250
	251	print PM tab(4, " '$k'"), '=> "',
	252	# mkHex($warn_size, @list),
	253	mkHex($warn_size, map $_ * 2 + 1 , @list),
	254	'", # [', mkRange(@list), "]\n" ;
	255	}
	256
	257	print PM " );\n\n" ;
	258	while (<DATA>) {
	259	print PM $_ ;
	260	}
	261
	262	close PM ;
	263
	264	__END__
	265
4438c4b7	266	# This file was created by warnings.pl
599cee73 PM	267	# Any changes made here will be lost.
	268	#
	269
4438c4b7	270	package warnings;
599cee73 PM	271
	272	=head1 NAME
	273
4438c4b7	274	warnings - Perl pragma to control optional warnings
599cee73 PM	275
	276	=head1 SYNOPSIS
	277
4438c4b7 JH	278	use warnings;
4438c4b7 JH	279	no warnings;
599cee73	280
4438c4b7 JH	281	use warnings "all";
4438c4b7 JH	282	no warnings "all";
599cee73 PM	283
	284	=head1 DESCRIPTION
	285
0453d815 PM	286	If no import list is supplied, all possible warnings are either enabled
0453d815 PM	287	or disabled.
599cee73	288
0453d815	289	See L<perlmod/Pragmatic Modules> and L<perllexwarn>.
599cee73 PM	290
	291
	292	=cut
	293
	294	use Carp ;
	295
	296	KEYWORDS
	297
	298	sub bits {
	299	my $mask ;
	300	my $catmask ;
	301	my $fatal = 0 ;
	302	foreach my $word (@_) {
	303	if ($word eq 'FATAL')
	304	{ $fatal = 1 }
	305	elsif ($catmask = $Bits{$word}) {
	306	$mask \|= $catmask ;
	307	$mask \|= $DeadBits{$word} if $fatal ;
	308	}
	309	else
	310	{ croak "unknown warning category '$word'" }
	311	}
	312
	313	return $mask ;
	314	}
	315
	316	sub import {
	317	shift;
4438c4b7	318	${^Warnings} \|= bits(@_ ? @_ : 'all') ;
599cee73 PM	319	}
	320
	321	sub unimport {
	322	shift;
4438c4b7	323	${^Warnings} &= ~ bits(@_ ? @_ : 'all') ;
599cee73 PM	324	}
	325
	326	sub enabled
	327	{
	328	my $string = shift ;
	329
	330	return 1
4438c4b7	331	if $bits{$string} && ${^Warnings} & $bits{$string} ;
599cee73 PM	332
	333	return 0 ;
	334	}
	335
	336	1;