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# Copyrights 2007-2025 by [Mark Overmeer <markov@cpan.org>].
# For other contributors see ChangeLog.
# See the manual pages for details on the licensing terms.
# Pod stripped from pm file by OODoc 2.03.
# This code is part of distribution Log-Report-Lexicon. Meta-POD processed
# with OODoc into POD and HTML manual-pages. See README.md
# Copyright Mark Overmeer. Licensed under the same terms as Perl itself.
package Log::Report::Lexicon::MOTcompact;{
our $VERSION = '1.12';
}
use base 'Log::Report::Lexicon::Table';
use warnings;
use strict;
use Log::Report 'log-report-lexicon';
use Fcntl qw(SEEK_SET);
use Encode qw(find_encoding);
use constant MAGIC_NUMBER => 0x95_04_12_DE;
sub read($@)
{ my ($class, $fn, %args) = @_;
my $charset = $args{charset};
$charset = $1
if !$charset && $fn =~ m!\.([\w-]+)(?:\@[^/\\]+)?\.g?mo$!i;
my $enc;
if(defined $charset)
{ $enc = find_encoding($charset)
or error __x"unsupported explicit charset {charset} for {fn}"
, charset => $charset, fn => $fn;
}
my (%index, %locs);
my %self =
+( index => \%index # fully prepared ::PO objects
, locs => \%locs # know where to find it
, filename => $fn
);
my $self = bless \%self, $class;
my $fh;
open $fh, "<:raw", $fn
or fault __x"cannot read mo from file {fn}", fn => $fn;
# The magic number will tell us the byte-order
# See http://www.gnu.org/software/gettext/manual/html_node/MO-Files.html
# Found in a bug-report that msgctxt are prepended to the msgid with
# a separating EOT (4)
my ($magic, $superblock, $originals, $translations);
CORE::read $fh, $magic, 4
or fault __x"cannot read magic from {fn}", fn => $fn;
my $byteorder
= $magic eq pack('V', MAGIC_NUMBER) ? 'V'
: $magic eq pack('N', MAGIC_NUMBER) ? 'N'
: error __x"unsupported file type (magic number is {magic%x})"
, magic => $magic;
# The superblock contains pointers to strings
CORE::read $fh, $superblock, 6*4 # 6 times a 32 bit int
or fault __x"cannot read superblock from {fn}", fn => $fn;
my ( $format_rev, $nr_strings, $offset_orig, $offset_trans
, $size_hash, $offset_hash ) = unpack $byteorder x 6, $superblock;
# warn "($format_rev, $nr_strings, $offset_orig, $offset_trans
# , $size_hash, $offset_hash)";
# Read location of all originals
seek $fh, $offset_orig, SEEK_SET
or fault __x"cannot seek to {loc} in {fn} for originals"
, loc => $offset_orig, fn => $fn;
CORE::read $fh, $originals, $nr_strings*8 # each string 2*4 bytes
or fault __x"cannot read originals from {fn}, need {size} at {loc}"
, fn => $fn, loc => $offset_orig, size => $nr_strings*4;
my @origs = unpack $byteorder.'*', $originals;
# Read location of all translations
seek $fh, $offset_trans, SEEK_SET
or fault __x"cannot seek to {loc} in {fn} for translations"
, loc => $offset_orig, fn => $fn;
CORE::read $fh, $translations, $nr_strings*8 # each string 2*4 bytes
or fault __x"cannot read translations from {fn}, need {size} at {loc}"
, fn => $fn, loc => $offset_trans, size => $nr_strings*4;
my @trans = unpack $byteorder.'*', $translations;
# We need the originals as index to the translations (unless there
# is a HASH build-in... which is not defined)
# The strings are strictly ordered, the spec tells me, to allow binary
# search. Better swiftly process the whole block into a hash.
my ($orig_start, $orig_end) = ($origs[1], $origs[-1]+$origs[-2]);
seek $fh, $orig_start, SEEK_SET
or fault __x"cannot seek to {loc} in {fn} for msgid strings"
, loc => $orig_start, fn => $fn;
my ($orig_block, $trans_block);
my $orig_block_size = $orig_end - $orig_start;
CORE::read $fh, $orig_block, $orig_block_size
or fault __x"cannot read msgids from {fn}, need {size} at {loc}"
, fn => $fn, loc => $orig_start, size => $orig_block_size;
my ($trans_start, $trans_end) = ($trans[1], $trans[-1]+$trans[-2]);
seek $fh, $trans_start, SEEK_SET
or fault __x"cannot seek to {loc} in {fn} for transl strings"
, loc => $trans_start, fn => $fn;
my $trans_block_size = $trans_end - $trans_start;
CORE::read $fh, $trans_block, $trans_block_size
or fault __x"cannot read translations from {fn}, need {size} at {loc}"
, fn => $fn, loc => $trans_start, size => $trans_block_size;
while(@origs)
{ my ($id_len, $id_loc) = (shift @origs, shift @origs);
my $msgid_b = substr $orig_block, $id_loc-$orig_start, $id_len;
my $msgctxt_b = $msgid_b =~ s/(.*)\x04// ? $1 : '';
my ($trans_len, $trans_loc) = (shift @trans, shift @trans);
my $msgstr_b = substr $trans_block, $trans_loc - $trans_start, $trans_len;
unless(defined $charset)
{ $msgid_b eq ''
or error __x"the header is not the first entry, needed for charset in {fn}", fn => $fn;
$charset = $msgstr_b =~ m/^content-type:.*?charset=["']?([\w-]+)/mi
? $1 : error __x"cannot detect charset in {fn}", fn => $fn;
trace "auto-detected charset $charset for $fn";
$enc = find_encoding($charset)
or error __x"unsupported charset {charset} in {fn}"
, charset => $charset, fn => $fn;
}
my $msgid = $enc->decode($msgid_b);
my $msgctxt = $enc->decode($msgctxt_b);
my @msgstr = map $enc->decode($_), split /\0x00/, $msgstr_b;
$index{"$msgid#$msgctxt"} = @msgstr > 1 ? \@msgstr : $msgstr[0];
}
close $fh
or failure __x"failed reading from file {fn}", fn => $fn;
$self->{origcharset} = $charset;
$self->setupPluralAlgorithm;
$self;
}
#---------
sub index() {shift->{index}}
sub filename() {shift->{filename}}
sub originalCharset() {shift->{origcharset}}
#---------------
sub msgid($;$)
{ my ($self, $msgid, $msgctxt) = @_;
my $tag = $msgid.'#'.($msgctxt//'');
$self->{index}{$tag};
}
sub msgstr($;$$)
{ my $po = $_[0]->msgid($_[1], $_[3])
or return undef;
ref $po # no plurals defined
or return $po;
# speed!!!
$po->[$_[0]->{algo}->(defined $_[2] ? $_[2] : 1)]
|| $po->[$_[0]->{algo}->(1)];
}
1;
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