103 lines
3.3 KiB
Perl
103 lines
3.3 KiB
Perl
package locale;
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our $VERSION = '1.09';
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use Config;
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$Carp::Internal{ (__PACKAGE__) } = 1;
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# A separate bit is used for each of the two forms of the pragma, to save
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# having to look at %^H for the normal case of a plain 'use locale' without an
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# argument.
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$locale::hint_bits = 0x4;
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$locale::partial_hint_bits = 0x10; # If pragma has an argument
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# The pseudo-category :characters consists of 2 real ones; but it also is
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# given its own number, -1, because in the complement form it also has the
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# side effect of "use feature 'unicode_strings'"
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sub import {
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shift; # should be 'locale'; not checked
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$^H{locale} = 0 unless defined $^H{locale};
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if (! @_) { # If no parameter, use the plain form that changes all categories
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$^H |= $locale::hint_bits;
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}
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else {
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my @categories = ( qw(:ctype :collate :messages
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:numeric :monetary :time) );
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for (my $i = 0; $i < @_; $i++) {
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my $arg = $_[$i];
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$complement = $arg =~ s/ : ( ! | not_ ) /:/x;
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if (! grep { $arg eq $_ } @categories, ":characters") {
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require Carp;
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Carp::croak("Unknown parameter '$_[$i]' to 'use locale'");
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}
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if ($complement) {
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if ($i != 0 || $i < @_ - 1) {
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require Carp;
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Carp::croak("Only one argument to 'use locale' allowed"
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. "if is $complement");
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}
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if ($arg eq ':characters') {
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push @_, grep { $_ ne ':ctype' && $_ ne ':collate' }
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@categories;
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# We add 1 to the category number; This category number
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# is -1
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$^H{locale} |= (1 << 0);
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}
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else {
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push @_, grep { $_ ne $arg } @categories;
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}
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next;
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}
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elsif ($arg eq ':characters') {
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push @_, ':ctype', ':collate';
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next;
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}
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$^H |= $locale::partial_hint_bits;
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# This form of the pragma overrides the other
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$^H &= ~$locale::hint_bits;
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$arg =~ s/^://;
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eval { require POSIX; import POSIX 'locale_h'; };
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# Map our names to the ones defined by POSIX
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my $LC = "LC_" . uc($arg);
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my $bit = eval "&POSIX::$LC";
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if (defined $bit) { # XXX Should we warn that this category isn't
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# supported on this platform, or make it
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# always be the C locale?
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# Verify our assumption.
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if (! ($bit >= 0 && $bit < 31)) {
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require Carp;
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Carp::croak("Cannot have ':$arg' parameter to 'use locale'"
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. " on this platform. Use the 'perlbug' utility"
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. " to report this problem, or send email to"
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. " 'perlbug\@perl.org'. $LC=$bit");
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}
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# 1 is added so that the pseudo-category :characters, which is
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# -1, comes out 0.
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$^H{locale} |= 1 << ($bit + 1);
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}
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}
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}
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}
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sub unimport {
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$^H &= ~($locale::hint_bits|$locale::partial_hint_bits);
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$^H{locale} = 0;
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}
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1;
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