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Erlang with Regexp Perl And Port

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How to print unicode on erlang with perl and open port.

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Erlang with Regexp Perl And Port

  1. 1. [LT] Regexp, Perl, and Port id:kdaiba
  2. 2. whoami id:kdaiba Erlang newbie Perl Monger Yokohama.pm Shibuya.pm Tokyo.pm Now, setting up quot;Japan Perl Associationquot; http://trac.endeworks.jp/trac/tpfj/wiki Infrastructure Engineer
  3. 3. Erlang supports unicode in R12B-5
  4. 4. Try to print utf-8 perl -e 'map{printf quot;%d,quot;,$_}(unpack quot;C*quot;,quot;寿quot;);print quot;nquot;;' 229,175,191, 1> UniString = [229,175,191]. quot;寿quot; 2> io:format(quot;~p~nquot;,[UniString]). quot;寿quot; ok 3> It's looks OK on mac's terminal. But ...
  5. 5. When you run this script... #!/usr/local/bin/escript main(_) -> Item0 = quot;寿quot;, Item1 = quot;寿限quot;, Item2 = quot;寿限無quot;, Item3 = [[229,175,191],[233,153,144],[231,132,161]], io:format(quot;~p~nquot;, [Item0]), io:format(quot;~p~nquot;, [Item1]), io:format(quot;~p~nquot;, [Item2]), [io:format(quot;~p~nquot;, [X]) || X <- Item3].
  6. 6. You'll get returns, like below quot;寿quot; [229,175,191,233,153,144] [229,175,191,233,153,144,231,132,161] quot;寿quot; [233,153,144] [231,132,161]
  7. 7. Do google There is a page, quot;Representing Unicode characters in Erlangquot; http://www.erlang.org/eeps/eep-0010.html It's a quot;Erlang Enhancement Proposals (EEPs)quot;, #10 This proposal's STATUS http://www.erlang.org/eeps/ Standards Track EEP Accepted proposal NOT quot;Proposal is implemented in OTP release R12B-5quot;
  8. 8. Can't I use utf-8 now ? use Erlang::Port to see Unicode
  9. 9. I made a perl script to printout utf-8 #!/usr/local/bin/escript main(_) -> perlsay:start(quot;./perlsay.plquot;), perlsay:say(quot;寿限無、寿限無、五劫の擦り切れ、海砂利水魚、水 行末、雲来末、風来末、食う寝る所に住む所、薮ら柑子のぶら柑子、 パイポ、パイポ、パイポのシューリンガン、シューリンガンのグーリンダ イ、グーリンダイのポンポコピーのポンポコナーの長久命の長助quot;), perlsay:stop().
  10. 10. You'll get returns on STDERR 寿限無、寿限無、五劫の擦り切れ、海砂利水魚、水行末、雲来末、 風来末、食う寝る所に住む所、薮ら柑子のぶら柑子、パイポ、パイ ポ、パイポのシューリンガン、シューリンガンのグーリンダイ、グーリン ダイのポンポコピーのポンポコナーの長久命の長助
  11. 11. Easy erlang code and -module(perlsay). -export([say/1]). -export([start/1, stop/0]). -import(perlport, [call/2, stop/1]). say(String) -> call([say, String], perlsay). start(Script) -> perlport:start(Script, perlsay). stop() -> perlport:stop(perlsay).
  12. 12. Spaghetti perl script (1/4) #!/usr/local/bin/perl package Erlang::Port::Say; use strict; use warnings; use Erlang::Port; caller or __PACKAGE__->main(@ARGV); 1;
  13. 13. Spaghetti perl code (2/4) sub main { my $pkg = shift; Erlang::Port->new( sub { my $obj = shift; my $port = shift; my $ret = eval { _my_proc( $obj, $port ) }; $ret = $port->_newTuple( [ $port->_newAtom('error') => $@, ] ) if ($@); $ret; } )->loop(); }
  14. 14. Spagetti perl Script (3/4) sub _my_proc { my $obj = shift; my $port = shift; if ( !UNIVERSAL::isa( $obj, 'ARRAY' ) ) { return $port->_newTuple( [ $port->_newAtom('badarg'), $obj ] ); } my $key = _to_s( $obj->[0] ); if ( !defined($key) || $key ne 'say' ) { return $port->_newTuple( [ $port->_newAtom('badarg'), $obj ] ); } my $str = _to_s( $obj->[1] ); if ( !defined($str) ) { return $port->_newTuple( [ $port->_newAtom('badarg'), $obj ] ); } print STDERR $str, quot;nquot;; $str; }
  15. 15. Spagetti Perl Script (4/4) sub _to_s { my $obj = shift; if ( defined($obj) && !ref($obj) ) { $obj; } elsif ( $obj && ref($obj) eq 'ARRAY' && @$obj == 0 ) { quot;quot;; } elsif ( ref($obj) && UNIVERSAL::isa( $obj, 'Erlang::Atom' ) ) { $$obj; } elsif ( ref($obj) && UNIVERSAL::isa( $obj, 'Erlang::Binary' ) ) { $$obj; } else { undef; } }
  16. 16. quot;song and dancequot; too long ? I'm sorry to be boring
  17. 17. You can use this code like this #!/usr/local/bin/escript main(_) -> perlre:start(quot;./perlre.plquot;), perlsay:start(quot;./perlsay.plquot;), F = perlre:match(quot;赤とんぼquot;,quot;(p{Hiragana}+)quot;), [perlsay:say(X) || X <- F], perlre:stop(), perlsay:stop(). # perlre.pl is a sample code of Erlang::Port
  18. 18. Finally, you get ... とんぼ
  19. 19. Twist ending I need to check B12-R5 Today I have bad feelings. So I download B12-R5. It shows, Eshell V5.6.5 (abort with ^G) But, when I check my mac's erl, it shows Eshell V5.6.4 (abort with ^G) I made a mumbo jumbo ....

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