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Codes.pm
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package Locale::Codes; # Copyright (C) 2001 Canon Research Centre Europe (CRE). # Copyright (C) 2002-2009 Neil Bowers # Copyright (c) 2010-2015 Sullivan Beck # This program is free software; you can redistribute it and/or modify it # under the same terms as Perl itself. use strict; require 5.006; use warnings; use Carp; use Locale::Codes::Constants; #======================================================================= # Public Global Variables #======================================================================= # This module is not called directly... %Data is filled in by the # calling modules. our($VERSION,%Data,%Retired); # $Data{ TYPE }{ code2id }{ CODESET } { CODE } = [ ID, I ] # { id2code }{ CODESET } { ID } = CODE # { id2names }{ ID } = [ NAME, NAME, ... ] # { alias2id }{ NAME } = [ ID, I ] # { id } = FIRST_UNUSED_ID # { codealias }{ CODESET } { ALIAS } = CODE # # $Retired{ TYPE }{ CODESET }{ code }{ CODE } = NAME # { name }{ NAME } = [CODE,NAME] (the key is lowercase) $VERSION='3.34'; #======================================================================= # # _code ( TYPE,CODE,CODESET ) # #======================================================================= sub _code { return 1 if (@_ > 3); my($type,$code,$codeset) = @_; $code = '' if (! $code); # Determine the codeset $codeset = $ALL_CODESETS{$type}{'default'} if (! defined($codeset) || $codeset eq ''); $codeset = lc($codeset); return 1 if (! exists $ALL_CODESETS{$type}{'codesets'}{$codeset}); return (0,$code,$codeset) if (! $code); # Determine the properties of the codeset my($op,@args) = @{ $ALL_CODESETS{$type}{'codesets'}{$codeset} }; if ($op eq 'lc') { $code = lc($code); } elsif ($op eq 'uc') { $code = uc($code); } elsif ($op eq 'ucfirst') { $code = ucfirst(lc($code)); } elsif ($op eq 'numeric') { return (1) unless ($code =~ /^\d+$/); my $l = $args[0]; $code = sprintf("%.${l}d", $code); } return (0,$code,$codeset); } #======================================================================= # # _code2name ( TYPE,CODE [,CODESET] [,'retired'] ) # #======================================================================= sub _code2name { my($type,@args) = @_; my $retired = 0; if (@args > 0 && $args[$#args] && $args[$#args] eq 'retired') { pop(@args); $retired = 1; } my($err,$code,$codeset) = _code($type,@args); return undef if ($err || ! defined $code); $code = $Data{$type}{'codealias'}{$codeset}{$code} if (exists $Data{$type}{'codealias'}{$codeset}{$code}); if (exists $Data{$type}{'code2id'}{$codeset} && exists $Data{$type}{'code2id'}{$codeset}{$code}) { my ($id,$i) = @{ $Data{$type}{'code2id'}{$codeset}{$code} }; my $name = $Data{$type}{'id2names'}{$id}[$i]; return $name; } elsif ($retired && exists $Retired{$type}{$codeset}{'code'}{$code}) { return $Retired{$type}{$codeset}{'code'}{$code}; } else { return undef; } } #======================================================================= # # _name2code ( TYPE,NAME [,CODESET] [,'retired'] ) # #======================================================================= sub _name2code { my($type,$name,@args) = @_; return undef if (! $name); $name = lc($name); my $retired = 0; if (@args > 0 && $args[$#args] && $args[$#args] eq 'retired') { pop(@args); $retired = 1; } my($err,$tmp,$codeset) = _code($type,'',@args); return undef if ($err); if (exists $Data{$type}{'alias2id'}{$name}) { my $id = $Data{$type}{'alias2id'}{$name}[0]; if (exists $Data{$type}{'id2code'}{$codeset}{$id}) { return $Data{$type}{'id2code'}{$codeset}{$id}; } } elsif ($retired && exists $Retired{$type}{$codeset}{'name'}{$name}) { return $Retired{$type}{$codeset}{'name'}{$name}[0]; } return undef; } #======================================================================= # # _code2code ( TYPE,CODE,CODESET ) # #======================================================================= sub _code2code { my($type,@args) = @_; (@args == 3) or croak "${type}_code2code() takes 3 arguments!"; my($code,$inset,$outset) = @args; my($err,$tmp); ($err,$code,$inset) = _code($type,$code,$inset); return undef if ($err); ($err,$tmp,$outset) = _code($type,'',$outset); return undef if ($err); my $name = _code2name($type,$code,$inset); my $outcode = _name2code($type,$name,$outset); return $outcode; } #======================================================================= # # _all_codes ( TYPE [,CODESET] [,'retired'] ) # #======================================================================= sub _all_codes { my($type,@args) = @_; my $retired = 0; if (@args > 0 && $args[$#args] && $args[$#args] eq 'retired') { pop(@args); $retired = 1; } my ($err,$tmp,$codeset) = _code($type,'',@args); return () if ($err); if (! exists $Data{$type}{'code2id'}{$codeset}) { return (); } my @codes = keys %{ $Data{$type}{'code2id'}{$codeset} }; push(@codes,keys %{ $Retired{$type}{$codeset}{'code'} }) if ($retired); return (sort @codes); } #======================================================================= # # _all_names ( TYPE [,CODESET] [,'retired'] ) # #======================================================================= sub _all_names { my($type,@args) = @_; my $retired = 0; if (@args > 0 && $args[$#args] && $args[$#args] eq 'retired') { pop(@args); $retired = 1; } my ($err,$tmp,$codeset) = _code($type,'',@args); return () if ($err); my @codes = _all_codes($type,$codeset); my @names; foreach my $code (@codes) { my($id,$i) = @{ $Data{$type}{'code2id'}{$codeset}{$code} }; my $name = $Data{$type}{'id2names'}{$id}[$i]; push(@names,$name); } if ($retired) { foreach my $lc (keys %{ $Retired{$type}{$codeset}{'name'} }) { my $name = $Retired{$type}{$codeset}{'name'}{$lc}[1]; push @names,$name; } } return (sort @names); } #======================================================================= # # _rename ( TYPE,CODE,NAME,CODESET ) # # Change the official name for a code. The original is retained # as an alias, but the new name will be returned if you lookup the # name from code. # #======================================================================= sub _rename { my($type,$code,$new_name,@args) = @_; my $nowarn = 0; $nowarn = 1, pop(@args) if (@args && $args[$#args] eq "nowarn"); my $codeset = shift(@args); my $err; ($err,$code,$codeset) = _code($type,$code,$codeset); if (! $codeset) { carp "rename_$type(): unknown codeset\n" unless ($nowarn); return 0; } $code = $Data{$type}{'codealias'}{$codeset}{$code} if (exists $Data{$type}{'codealias'}{$codeset}{$code}); # Check that $code exists in the codeset. my $id; if (exists $Data{$type}{'code2id'}{$codeset}{$code}) { $id = $Data{$type}{'code2id'}{$codeset}{$code}[0]; } else { carp "rename_$type(): unknown code: $code\n" unless ($nowarn); return 0; } # Cases: # 1. Renaming to a name which exists with a different ID # Error # # 2. Renaming to a name which exists with the same ID # Just change code2id (I value) # # 3. Renaming to a new name # Create a new alias # Change code2id (I value) if (exists $Data{$type}{'alias2id'}{lc($new_name)}) { # Existing name (case 1 and 2) my ($new_id,$i) = @{ $Data{$type}{'alias2id'}{lc($new_name)} }; if ($new_id != $id) { # Case 1 carp "rename_$type(): rename to an existing $type not allowed\n" unless ($nowarn); return 0; } # Case 2 $Data{$type}{'code2id'}{$codeset}{$code}[1] = $i; } else { # Case 3 push @{ $Data{$type}{'id2names'}{$id} },$new_name; my $i = $#{ $Data{$type}{'id2names'}{$id} }; $Data{$type}{'alias2id'}{lc($new_name)} = [ $id,$i ]; $Data{$type}{'code2id'}{$codeset}{$code}[1] = $i; } return 1; } #======================================================================= # # _add_code ( TYPE,CODE,NAME,CODESET ) # # Add a new code to the codeset. Both CODE and NAME must be # unused in the code set. # #======================================================================= sub _add_code { my($type,$code,$name,@args) = @_; my $nowarn = 0; $nowarn = 1, pop(@args) if (@args && $args[$#args] eq "nowarn"); my $codeset = shift(@args); my $err; ($err,$code,$codeset) = _code($type,$code,$codeset); if (! $codeset) { carp "add_$type(): unknown codeset\n" unless ($nowarn); return 0; } # Check that $code is unused. if (exists $Data{$type}{'code2id'}{$codeset}{$code} || exists $Data{$type}{'codealias'}{$codeset}{$code}) { carp "add_$type(): code already in use: $code\n" unless ($nowarn); return 0; } # Check to see that $name is unused in this code set. If it is # used (but not in this code set), we'll use that ID. Otherwise, # we'll need to get the next available ID. my ($id,$i); if (exists $Data{$type}{'alias2id'}{lc($name)}) { ($id,$i) = @{ $Data{$type}{'alias2id'}{lc($name)} }; if (exists $Data{$type}{'id2code'}{$codeset}{$id}) { carp "add_$type(): name already in use: $name\n" unless ($nowarn); return 0; } } else { $id = $Data{$type}{'id'}++; $i = 0; $Data{$type}{'alias2id'}{lc($name)} = [ $id,$i ]; $Data{$type}{'id2names'}{$id} = [ $name ]; } # Add the new code $Data{$type}{'code2id'}{$codeset}{$code} = [ $id,$i ]; $Data{$type}{'id2code'}{$codeset}{$id} = $code; return 1; } #======================================================================= # # _delete_code ( TYPE,CODE,CODESET ) # # Delete a code from the codeset. # #======================================================================= sub _delete_code { my($type,$code,@args) = @_; my $nowarn = 0; $nowarn = 1, pop(@args) if (@args && $args[$#args] eq "nowarn"); my $codeset = shift(@args); my $err; ($err,$code,$codeset) = _code($type,$code,$codeset); if (! $codeset) { carp "delete_$type(): unknown codeset\n" unless ($nowarn); return 0; } $code = $Data{$type}{'codealias'}{$codeset}{$code} if (exists $Data{$type}{'codealias'}{$codeset}{$code}); # Check that $code is valid. if (! exists $Data{$type}{'code2id'}{$codeset}{$code}) { carp "delete_$type(): code does not exist: $code\n" unless ($nowarn); return 0; } # Delete the code my $id = $Data{$type}{'code2id'}{$codeset}{$code}[0]; delete $Data{$type}{'code2id'}{$codeset}{$code}; delete $Data{$type}{'id2code'}{$codeset}{$id}; # Delete any aliases that are linked to this code foreach my $alias (keys %{ $Data{$type}{'codealias'}{$codeset} }) { next if ($Data{$type}{'codealias'}{$codeset}{$alias} ne $code); delete $Data{$type}{'codealias'}{$codeset}{$alias}; } # If this ID is not used in any other codeset, delete it completely. foreach my $c (keys %{ $Data{$type}{'id2code'} }) { return 1 if (exists $Data{$type}{'id2code'}{$c}{$id}); } my @names = @{ $Data{$type}{'id2names'}{$id} }; delete $Data{$type}{'id2names'}{$id}; foreach my $name (@names) { delete $Data{$type}{'alias2id'}{lc($name)}; } return 1; } #======================================================================= # # _add_alias ( TYPE,NAME,NEW_NAME ) # # Add a new alias. NAME must exist, and NEW_NAME must be unused. # #======================================================================= sub _add_alias { my($type,$name,$new_name,$nowarn) = @_; $nowarn = (defined($nowarn) && $nowarn eq "nowarn" ? 1 : 0); # Check that $name is used and $new_name is new. my($id); if (exists $Data{$type}{'alias2id'}{lc($name)}) { $id = $Data{$type}{'alias2id'}{lc($name)}[0]; } else { carp "add_${type}_alias(): name does not exist: $name\n" unless ($nowarn); return 0; } if (exists $Data{$type}{'alias2id'}{lc($new_name)}) { carp "add_${type}_alias(): alias already in use: $new_name\n" unless ($nowarn); return 0; } # Add the new alias push @{ $Data{$type}{'id2names'}{$id} },$new_name; my $i = $#{ $Data{$type}{'id2names'}{$id} }; $Data{$type}{'alias2id'}{lc($new_name)} = [ $id,$i ]; return 1; } #======================================================================= # # _delete_alias ( TYPE,NAME ) # # This deletes a name from the list of names used by an element. # NAME must be used, but must NOT be the only name in the list. # # Any id2name that references this name will be changed to # refer to the first name in the list. # #======================================================================= sub _delete_alias { my($type,$name,$nowarn) = @_; $nowarn = (defined($nowarn) && $nowarn eq "nowarn" ? 1 : 0); # Check that $name is used. my($id,$i); if (exists $Data{$type}{'alias2id'}{lc($name)}) { ($id,$i) = @{ $Data{$type}{'alias2id'}{lc($name)} }; } else { carp "delete_${type}_alias(): name does not exist: $name\n" unless ($nowarn); return 0; } my $n = $#{ $Data{$type}{'id2names'}{$id} } + 1; if ($n == 1) { carp "delete_${type}_alias(): only one name defined (use _delete_${type} instead)\n" unless ($nowarn); return 0; } # Delete the alias. splice (@{ $Data{$type}{'id2names'}{$id} },$i,1); delete $Data{$type}{'alias2id'}{lc($name)}; # Every element that refers to this ID: # Ignore if I < $i # Set to 0 if I = $i # Decrement if I > $i foreach my $codeset (keys %{ $Data{'code2id'} }) { foreach my $code (keys %{ $Data{'code2id'}{$codeset} }) { my($jd,$j) = @{ $Data{'code2id'}{$codeset}{$code} }; next if ($jd ne $id || $j < $i); if ($i == $j) { $Data{'code2id'}{$codeset}{$code}[1] = 0; } else { $Data{'code2id'}{$codeset}{$code}[1]--; } } } return 1; } #======================================================================= # # _rename_code ( TYPE,CODE,NEW_CODE,CODESET ) # # Change the official code. The original is retained as an alias, but # the new name will be returned if you lookup the code from name. # #======================================================================= sub _rename_code { my($type,$code,$new_code,@args) = @_; my $nowarn = 0; $nowarn = 1, pop(@args) if (@args && $args[$#args] eq "nowarn"); my $codeset = shift(@args); my $err; ($err,$code,$codeset) = _code($type,$code,$codeset); ($err,$new_code,$codeset) = _code($type,$new_code,$codeset) if (! $err); if (! $codeset) { carp "rename_$type(): unknown codeset\n" unless ($nowarn); return 0; } $code = $Data{$type}{'codealias'}{$codeset}{$code} if (exists $Data{$type}{'codealias'}{$codeset}{$code}); # Check that $code exists in the codeset. if (! exists $Data{$type}{'code2id'}{$codeset}{$code}) { carp "rename_$type(): unknown code: $code\n" unless ($nowarn); return 0; } # Cases: # 1. Renaming code to an existing alias of this code: # Make the alias real and the code an alias # # 2. Renaming code to some other existing alias: # Error # # 3. Renaming code to some other code: # Error ( # # 4. Renaming code to a new code: # Make code into an alias # Replace code with new_code. if (exists $Data{$type}{'codealias'}{$codeset}{$new_code}) { # Cases 1 and 2 if ($Data{$type}{'codealias'}{$codeset}{$new_code} eq $code) { # Case 1 delete $Data{$type}{'codealias'}{$codeset}{$new_code}; } else { # Case 2 carp "rename_$type(): new code already in use: $new_code\n" unless ($nowarn); return 0; } } elsif (exists $Data{$type}{'code2id'}{$codeset}{$new_code}) { # Case 3 carp "rename_$type(): new code already in use: $new_code\n" unless ($nowarn); return 0; } # Cases 1 and 4 $Data{$type}{'codealias'}{$codeset}{$code} = $new_code; my $id = $Data{$type}{'code2id'}{$codeset}{$code}[0]; $Data{$type}{'code2id'}{$codeset}{$new_code} = $Data{$type}{'code2id'}{$codeset}{$code}; delete $Data{$type}{'code2id'}{$codeset}{$code}; $Data{$type}{'id2code'}{$codeset}{$id} = $new_code; return 1; } #======================================================================= # # _add_code_alias ( TYPE,CODE,NEW_CODE,CODESET ) # # Adds an alias for the code. # #======================================================================= sub _add_code_alias { my($type,$code,$new_code,@args) = @_; my $nowarn = 0; $nowarn = 1, pop(@args) if (@args && $args[$#args] eq "nowarn"); my $codeset = shift(@args); my $err; ($err,$code,$codeset) = _code($type,$code,$codeset); ($err,$new_code,$codeset) = _code($type,$new_code,$codeset) if (! $err); if (! $codeset) { carp "add_${type}_code_alias(): unknown codeset\n" unless ($nowarn); return 0; } $code = $Data{$type}{'codealias'}{$codeset}{$code} if (exists $Data{$type}{'codealias'}{$codeset}{$code}); # Check that $code exists in the codeset and that $new_code # does not exist. if (! exists $Data{$type}{'code2id'}{$codeset}{$code}) { carp "add_${type}_code_alias(): unknown code: $code\n" unless ($nowarn); return 0; } if (exists $Data{$type}{'code2id'}{$codeset}{$new_code} || exists $Data{$type}{'codealias'}{$codeset}{$new_code}) { carp "add_${type}_code_alias(): code already in use: $new_code\n" unless ($nowarn); return 0; } # Add the alias $Data{$type}{'codealias'}{$codeset}{$new_code} = $code; return 1; } #======================================================================= # # _delete_code_alias ( TYPE,CODE,CODESET ) # # Deletes an alias for the code. # #======================================================================= sub _delete_code_alias { my($type,$code,@args) = @_; my $nowarn = 0; $nowarn = 1, pop(@args) if (@args && $args[$#args] eq "nowarn"); my $codeset = shift(@args); my $err; ($err,$code,$codeset) = Locale::Codes::_code($type,$code,$codeset); if (! $codeset) { carp "delete_${type}_code_alias(): unknown codeset\n" unless ($nowarn); return 0; } # Check that $code exists in the codeset as an alias. if (! exists $Data{$type}{'codealias'}{$codeset}{$code}) { carp "delete_${type}_code_alias(): no alias defined: $code\n" unless ($nowarn); return 0; } # Delete the alias delete $Data{$type}{'codealias'}{$codeset}{$code}; return 1; } 1; # Local Variables: # mode: cperl # indent-tabs-mode: nil # cperl-indent-level: 3 # cperl-continued-statement-offset: 2 # cperl-continued-brace-offset: 0 # cperl-brace-offset: 0 # cperl-brace-imaginary-offset: 0 # cperl-label-offset: -2 # End: