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,
+
+'all' => {
+ '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,
+ 'syntax' => { 'ambiguous' => DEFAULT_OFF,
'semicolon' => DEFAULT_OFF,
'precedence' => DEFAULT_OFF,
+ 'bareword' => DEFAULT_OFF,
'reserved' => DEFAULT_OFF,
- 'octal' => DEFAULT_OFF,
'digit' => DEFAULT_OFF,
'parenthesis' => DEFAULT_OFF,
'deprecated' => DEFAULT_OFF,
'printf' => DEFAULT_OFF,
+ 'prototype' => DEFAULT_OFF,
+ 'qw' => DEFAULT_OFF,
},
- 'severe' => { 'inplace' => DEFAULT_ON,
+ '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,
+ '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,
- } ;
+ }
+} ;
###########################################################################
my %list ;
my %Value ;
-my $index = 0 ;
+my $index ;
sub walk
{
}
###########################################################################
+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
{
###########################################################################
+if (@ARGV && $ARGV[0] eq "tree")
+{
+ #print " all -+\n" ;
+ printTree($tree, " ", 4) ;
+ exit ;
+}
#unlink "warnings.h";
#unlink "lib/warnings.pm";
#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 (Nullsv+1) /* use warnings 'all' */
-#define WARN_NONE (Nullsv+2) /* 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)))
+#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 = 0 ;
-@{ $list{"all"} } = walk ($tree) ;
$index *= 2 ;
my $warn_size = int($index / 8) + ($index % 8 != 0) ;
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
print PM $_ ;
}
-$list{'all'} = [ 0 .. 8 * ($warn_size/2) - 1 ] ;
+#$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 $k (sort keys %list) {
}
print PM " );\n\n" ;
+print PM '$NONE = "', ('\0' x $warn_size) , "\";\n" ;
+print PM '$LAST_BIT = ' . "$index ;\n" ;
+print PM '$BYTES = ' . "$warn_size ;\n" ;
while (<DATA>) {
print PM $_ ;
}
use warnings "all";
no warnings "all";
+ use warnings::register;
+ if (warnings::enabled()) {
+ warnings::warn("some warning");
+ }
+
+ if (warnings::enabled("void")) {
+ warnings::warn("void", "some warning");
+ }
+
=head1 DESCRIPTION
If no import list is supplied, all possible warnings are either enabled
or disabled.
-See L<perlmod/Pragmatic Modules> and L<perllexwarn>.
+A number of functions are provided to assist module authors.
+
+=over 4
+
+=item use warnings::register
+
+Creates a new warnings category which has the same name as the module
+where the call to the pragma is used.
+=item warnings::enabled([$category])
+
+Returns TRUE if the warnings category C<$category> is enabled in the
+calling module. Otherwise returns FALSE.
+
+If the parameter, C<$category>, isn't supplied, the current package name
+will be used.
+
+=item warnings::warn([$category,] $message)
+
+If the calling module has I<not> set C<$category> to "FATAL", print
+C<$message> to STDERR.
+If the calling module has set C<$category> to "FATAL", print C<$message>
+STDERR then die.
+
+If the parameter, C<$category>, isn't supplied, the current package name
+will be used.
+
+=back
+
+See L<perlmod/Pragmatic Modules> and L<perllexwarn>.
=cut
KEYWORDS
+$All = "" ; vec($All, $Offsets{'all'}, 2) = 3 ;
+
sub bits {
my $mask ;
my $catmask ;
my $fatal = 0 ;
foreach my $word (@_) {
- if ($word eq 'FATAL')
- { $fatal = 1 }
+ if ($word eq 'FATAL') {
+ $fatal = 1;
+ }
elsif ($catmask = $Bits{$word}) {
- $mask |= $catmask ;
- $mask |= $DeadBits{$word} if $fatal ;
+ $mask |= $catmask ;
+ $mask |= $DeadBits{$word} if $fatal ;
}
else
- { croak "unknown warning category '$word'" }
+ { croak("unknown warnings category '$word'")}
}
return $mask ;
sub import {
shift;
- ${^Warnings} |= bits(@_ ? @_ : 'all') ;
+ ${^WARNING_BITS} |= bits(@_ ? @_ : 'all') ;
}
sub unimport {
shift;
- ${^Warnings} &= ~ bits(@_ ? @_ : 'all') ;
+ 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 enabled
{
- my $string = shift ;
+ croak("Usage: warnings::enabled([category])")
+ unless @_ == 1 || @_ == 0 ;
+ local $Carp::CarpLevel = 1 ;
+ my $category ;
+ my $offset ;
+ my $callers_bitmask = (caller(1))[9] ;
+ return 0 unless defined $callers_bitmask ;
+
+
+ if (@_) {
+ # check the category supplied.
+ $category = shift ;
+ $offset = $Offsets{$category};
+ croak("unknown warnings category '$category'")
+ unless defined $offset;
+ }
+ else {
+ $category = (caller(0))[0] ;
+ $offset = $Offsets{$category};
+ croak("package '$category' not registered for warnings")
+ unless defined $offset ;
+ }
+
+ return vec($callers_bitmask, $offset, 1) ||
+ vec($callers_bitmask, $Offsets{'all'}, 1) ;
+}
+
+
+sub warn
+{
+ croak("Usage: warnings::warn([category,] 'message')")
+ unless @_ == 2 || @_ == 1 ;
+ local $Carp::CarpLevel = 1 ;
+ my $category ;
+ my $offset ;
+ my $callers_bitmask = (caller(1))[9] ;
+
+ if (@_ == 2) {
+ $category = shift ;
+ $offset = $Offsets{$category};
+ croak("unknown warnings category '$category'")
+ unless defined $offset ;
+ }
+ else {
+ $category = (caller(0))[0] ;
+ $offset = $Offsets{$category};
+ croak("package '$category' not registered for warnings")
+ unless defined $offset ;
+ }
- return 1
- if $bits{$string} && ${^Warnings} & $bits{$string} ;
-
- return 0 ;
+ my $message = shift ;
+ croak($message)
+ if vec($callers_bitmask, $offset+1, 1) ||
+ vec($callers_bitmask, $Offsets{'all'}+1, 1) ;
+ carp($message) ;
}
1;
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