Encoding.default_internal $B$N$?$a$N%Q%C%A(B

[drenovac]

[ruby-core:18774] に Michael Selig から Encoding::default_internal
の提案がありました。

http://redmine.ruby-lang.org/wiki/ruby/DevelopersMeeting20080922
ã«è¿½åŠ ã—ãŸã‚‰
Encoding::default_internal (Michael Selig, ruby-core:18774)
結果は
→ pending (今週中)
となりました。この件を勧めるためにパッチを作りました。
よかったら入れておきますが、田中さん、成瀬さんあたりが
きっともっといいものを作れるのでこちらのパッチを使わなくても
いいです。

テストは未だ初期段階ですが、とりあえず次のようにテストしました
(実行は -Eutf-8, -Eshift_jis, -Eeuc-jp, そして -E 無しで、
ãã‚Œãžã‚Œã®å ´åˆ default_internal の値を色々変更しました
(合わせて最後の行のファイル番語も変更しないといけません))

Encoding.default_internal = ‘utf-8’
# tested with ‘utf-8’, ‘shift_jis’, and ‘euc-jp’

s = “\u3042\u3044\u3046\u3048\u304A”
File.open(‘testout1.txt’, ‘w:shift_jis’) do |f| f.write s end
File.open(‘testout2.txt’, ‘w:euc-jp’) do |f| f.write s end
File.open(‘testout3.txt’, ‘w:utf-8’) do |f| f.write s end

File.open(‘testout1.txt’, ‘r:shift_jis’) do |f| s = f.read; p s.encoding
end
File.open(‘testout2.txt’, ‘r:euc-jp’) do |f| s = f.read; p s.encoding
end
File.open(‘testout3.txt’, ‘r:utf-8’) do |f| s = f.read; p s.encoding end
File.open(‘testout3.txt’, ‘r:ASCII-8BIT’) do |f| s = f.read; p
s.encoding end

for next line, change file number to pick up default_internal

File.open(‘testout3.txt’, ‘r’) do |f| s = f.read; p s.encoding end

是非とも宜しくお願いします。 Martin.

#-#-# Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-# http://www.sw.it.aoyama.ac.jp mailto:[email protected]

[drenovac]

e$B@.@%$G$9!#e(B

Martin D. wrote:

[ruby-core:18774] e$B$Ke(B Michael Selig e$B$+$ie(B Encoding::default_internal
e$B$NDs0F$,$"$j$^$7$?!#e(B

e$B$^$D$b$H$5$s$KCk$4$mJ9$$$?$H$3$m!"$^$@;W0FCf$N$h$&$G$9!#e(B

e$B7k6Ie(B default_internal e$B$C$F$N$Oe(B multi-locale e$B$r;X8~$9$ke(B
Ruby e$B$+$i$9$k$H5U9T$9$kB8:_$J$N$G!“Fq$7$$$H$3$m$G$O$”$j$^$9!#e(B

[drenovac]

In article 6.0.0.20.2.20080924195217.06173a20@localhost,
Martin D. [email protected] writes:

http://redmine.ruby-lang.org/wiki/ruby/DevelopersMeeting20080922
e$B$KDI2C$7$?$ie(B
Encoding::default_internal (Michael Selig, ruby-core:18774)
e$B7k2L$Oe(B
→ pending (e$B:#=5Cfe(B)
e$B$H$J$j$^$7$?!#$3$N7o$r4+$a$k$?$a$K%Q%C%A$r:n$j$^$7$?!#e(B

Encoding.default_internal = ‘utf-8’
# tested with ‘utf-8’, ‘shift_jis’, and ‘euc-jp’

e$BJQ992DG=$H$9$k$3$H$K$D$$$F$O!"%9%l%C%I%;!<%U$G$J$$$3$H$K2??Me(B
e$B$b7|G0$rI=L@$7$F$$$^$9$M!#;d$b4m$&$$$H;W$$$^$9!#e(B

e$B$^$?!“JQ49$9$k$N$K$O$=$l$O$=$l$G6lO+$,$”$k$s$8$c$J$$$G$7$g$&e(B
e$B$+!#e(B

e$B$?$H$($P!"e(BPython 3000 e$B$G$O!“e(Bargv
e$B$KJQ$J%P%$%HNs$,M?$($i$l$?e(B
e$B>l9g$K5/F0;~$K%(%i!<$K$J$k$H$$$&OC$,$”$j$^$7$?!#e(B
http://mail.python.org/pipermail/python-3000/2007-September/010445.html
(e$B8=:_$I$&$J$C$F$$$k$+$O3NG’$7$F$$$^$;$s!#e(B)

e$BJQ49$9$k$H$$$&$3$H$O<:GT$9$k2DG=@-$,M-$k$o$1$G!“<:GT$r$&$^$/e(B
e$B07$($k$+9M$($F$_$kI,MW$,$”$k$N$G$O$J$$$G$7$g$&$+!#e(B

[drenovac]

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36517] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Wed, 24 Sep 2008 21:23:48 +0900, “NARUSE, Yui”
[email protected] writes:

|Martin D. wrote:
|> [ruby-core:18774] e$B$Ke(B Michael Selig e$B$+$ie(B Encoding::default_internal
|> e$B$NDs0F$,$“$j$^$7$?!#e(B
|
|e$B$^$D$b$H$5$s$KCk$4$mJ9$$$?$H$3$m!”$^$@;W0FCf$N$h$&$G$9!#e(B
|
|e$B7k6Ie(B default_internal e$B$C$F$N$Oe(B multi-locale e$B$r;X8~$9$ke(B
|Ruby e$B$+$i$9$k$H5U9T$9$kB8:_$J$N$G!“Fq$7$$$H$3$m$G$O$”$j$^$9!#e(B

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default_internale$B$Oe(BIOe$B$Ge(Binternale$B$r;XDj$7$J$+$C$?>l9g$N%(%s%3!<e(B
e$B%G%#%s%0$G$"$ke(B
*
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• default_internale$B$be(B-Ee$B%*%W%7%g%s$G;XDj$9$k!#;XDj=q<0$Oe(B

  -E iso-2022-jp:utf-8

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  e$B$O!"6u$Ne(Bdefault_internale$B$r;XDj$7$Fe(B

  -E iso-2022-jp:

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  euc-jp:e$B!W$HF1$80Ue(B
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*
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                            e$BD>A0$G?=$7Lu$J$$e(B
                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

[drenovac]

e$B1J0f!wCNG=!%6e9)Bg$G$9!%e(B

From: Yukihiro M. [email protected]
Subject: [ruby-dev:36523] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B
Date: Thu, 25 Sep 2008 00:49:10 +0900
Message-ID: [email protected]

|Martin D. wrote:
|> [ruby-core:18774] e$B$Ke(B Michael Selig e$B$+$ie(B Encoding::default_internal
|> e$B$NDs0F$,$“$j$^$7$?!#e(B
|
|e$B$^$D$b$H$5$s$KCk$4$mJ9$$$?$H$3$m!”$^$@;W0FCf$N$h$&$G$9!#e(B
|
|e$B7k6Ie(B default_internal e$B$C$F$N$Oe(B multi-locale e$B$r;X8~$9$ke(B
|Ruby e$B$+$i$9$k$H5U9T$9$kB8:_$J$N$G!“Fq$7$$$H$3$m$G$O$”$j$^$9!#e(B

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[drenovac]

e$B$3$s$K$A$O!"$J$+$`$ie(B(e$B$&e(B)e$B$G$9!#e(B

In message “[ruby-dev:36523] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Sep.25,2008 00:49:10, [email protected] wrote:
| e$B:#F|0lF|9M$($F!"F3F~$9$k$3$H$K$7$^$7$?!#e(B
|
| e$B0J2<$N$h$&$J;EMM$r9M$($F$$$^$9!#e(B

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e$B?^$N$&$A$@$H$$$&$3$H$G$9$h$Me(B?

| e$B$3$l$K$H$b$J$$!“e(BUTF-{16,32}e$BBP1~$Oe(Bence$B$+$i30$7$?J}$,$h$$$+$b$7e(B
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[drenovac]

e$B@.@%$G$9!#e(B

Yukihiro M. wrote:

e$B$G$-$^$;$s$7!#MW$9$k$K:#$Ne(BM17Ne$B$G$Oe(BASCII e$B%3%s%Q%A$G$J$$%(%s%3!<e(B
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e$B$H$Oe(B(e$BEvLLe(B)e$B%5%]!<%H$7$J$/$F$b$h$$$N$G$O$J$$$+!”$H$$$&0UL#$G$9!#e(B

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e$B;W$&$K!“8=:_7|0F$N=t!9$NLdBj$K0lDL$j2r$O$”$C$F!"C<E*$K8@$($Pe(B
e$B!Ve(B7bit ASCII String e$B$re(B UTF-16
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e$BNc$($P!"e(BUTF-16LE e$B$Ne(B str="e$B$“e(B” e$B$KBP$7$Fe(B
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e$B$K7h$^$C$F$$$^$9!#e(B
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e$B=hM}B.EY$b$^$!Bg>fIW$G$7$g$&!#e(B

e$B@55,I=8=$b;EMM>e$NG:$_$OA4$/$"$j$^$;$s!#e(B
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ASCIIe$B8_49LdBj$r2sHr$G$-$k$3$H$N4r$7$5$NJ}$,Bg$-$$$H;W$C$F$$$ke(B
e$B$N$G$9$,e(B(e$B@55,I=8=$H$+$bHf3SE<+A3$K;H$($k$h$&$K$J$k$7e(B)e$B!"$$$d!“e(B
e$B$=$l$G$be(BUTF-16e$B$r$=$N$^$^JQ49$J$7$K07$($kJ}$,NI$$$N$@$H$$$&$3e(B
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e$B0J>e$N$h$&$K!"e(BUTF-{16,32} e$B$O%P%$%HNs$H$7$F$Oe(B ASCII
e$BHs8_49$G$b!"e(B
e$B%3!<%I%]%$%s%HNs$H$7$F$Oe(B ASCII e$B8_49$J$N$G!"e(B
e$B$=$3$^$GG:$_$,B?$$$o$1$G$O$J$$$N$G$9!#e(B

[drenovac]

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36532] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Thu, 25 Sep 2008 06:03:31 +0900, “U.Nakamura”
[email protected] writes:

|| e$B0J2<$N$h$&$J;EMM$r9M$($F$$$^$9!#e(B
|
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open(path, “r:UTF-16BE”)

e$B$H;XDj$9$k$H!“%U%!%$%k$NFbMF$Oe(BUTF-8e$B$KJQ49$5$l$FFI$_9~$^$l!”=he(B
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                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

[drenovac]

e$B@.@%$G$9!#e(B

Yukihiro M. wrote:

|
|e$B7k6Ie(B default_internal e$B$C$F$N$Oe(B multi-locale e$B$r;X8~$9$ke(B
|Ruby e$B$+$i$9$k$H5U9T$9$kB8:_$J$N$G!“Fq$7$$$H$3$m$G$O$”$j$^$9!#e(B

e$B:#F|0lF|9M$($F!"F3F~$9$k$3$H$K$7$^$7$?!#e(B

e$B0J2<$N$h$&$J;EMM$r9M$($F$$$^$9!#e(B

• default_internale$B$Oe(BIOe$B$Ge(Binternale$B$r;XDj$7$J$+$C$?>l9g$N%(%s%3!<e(B
  e$B%G%#%s%0$G$"$ke(B

internal e$B$r;XDj$7$J$+$C$?>l9g!"e(BIO#internal_encoding e$B$Oe(B nil
e$B$N$^$^$Ge(B
e$B$$$$$G$7$g$&$+!#e(B

• e$B$3$l$,;XDj$5$l$F$$$k;~e(BIOe$B$+$i$NF~NO$Oe(B(e$B%P%$%J%j$G$J$$8B$je(B)e$B!"e(B
  e$B$3$N%(%s%3!<%G%#%s%0$r;}$De(B(e$BI,MW$J$iJQ49$9$ke(B)e$B!#e(B

• (e$B=EMWe(B)e$B$J$K$b;XDj$7$J$$>l9g$Ne(Bdefault_externale$B$Oe(Blocalee$B!#e(B
  default_internale$B$O!Ve(BUTF-8e$B!W!#e(B

• e$B?7@_$Ne(B-Le$B%*%W%7%g%s$r;XDj$9$k$He(Bdefault_externale$B$Oe(Blocalee$B!"e(B
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e$B$3$l$O$3$N$^$^$@$H$^$:$$$G$9!#e(B
e$B$9$Y$F$,e(B UTF-8 e$B$J$i$P8@$&$^$G$bLdBj$"$j$^$;$s!#e(B
e$B$7$+$7!"F~NO85!&=PNO@h!&%9%/%j%W%H$N%j%F%i%k$,A4$FNc$($Pe(B CP932
e$B$N>l9g!"e(B
Ruby 1.9 e$B$G$OF~NO$H%j%F%i%k$r7k9g$G$-$^$;$s!#e(B
e$B$3$l$,!"e(BPerl
e$BEy$N>l9g$O%j%F%i%k$bJQ49$7$F$7$^$&$N$GLdBj$J$$$N$G$9$,!"e(B
Ruby 1.9 e$B$G$Oe(B e$B%j%F%i%k$O$=$N$^$^$J$N$GIT0lCW$,H/@8$7$^$9!#e(B

oneliner
e$BEy$N4JC1$J%9%/%j%W%H$G%j%F%i%k$r$=$N$^$^G’<1$5$;$?$$>l9g$K!"e(B
-L e$B0l$D$H$O$$$(%*%W%7%g%s$,I,MW$H$$$&$N$OHQ;($G$O$J$$$G$7$g$&$+!#e(B

e$B$3$l$N0l$D$N2r7h:v$O%j%F%i%k$be(B default_internal
e$B$KJQ49$7$F$7$^$&$3$H$G$9!#e(B

e$B$b$&0l$D$Oe(B default_internal e$B$N=i4|CM$r6u$K$7!"e(B
Unicoder e$BMQ$N%*%W%7%g%s$r?7@_$9$k$3$H$G$9e(B (e$B9,$$e(B -U
e$B$,6u$$$F$$$^$9e(B)e$B!#e(B

e$B;W$&$K!“e(BRuby
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e$B$J$<$J$i$P!”$=$N$h$&$J>l9g$O=q$/@dBPNL!"=hM}$K$+$+$k@dBP;~4V$,C;$$$N$G!"e(B
e$B:3:Y$J0c$$$N%$%s%Q%/%H$,Bg$-$$$+$i$G$9!#e(B

e$BNc$($Pe(B ruby -pe’1’ < hoge.txt e$B$H$7$?$H$-$K!"e(B
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e$B$4$F$4$F$H%%W%7%g%s$r$D$1$5$;$k$N$OG:$_B?$-e(B Unicoder
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• (e$BL$Dje(B)Dire$B$J$I$,JV$9%Q%9L>$Oe(Bdefault_externale$B$+$ie(B
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  e$B@8$7$?>l9g!"J8;z$,2=$1$k$N$OHr$1$?$$e(B(e$B%P%$%J%j$GJV$9$+e(B)e$B!#e(B

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e$B$s!<!"H`$N>l9g$O$=$l$3$=e(B UTF-8 e$B$KJQ49$7$FFbIt$G=hM}$7$F!"e(B
UTF-{16,32} e$B$GJV$;$P$$$$$@$1$@$H;W$C$?$N$G$9$,!#e(B
e$BB3$-$O$&$5$5$s$NJ}$K!#e(B

[drenovac]

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36534] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Thu, 25 Sep 2008 06:31:27 +0900, “NARUSE, Yui”
[email protected] writes:

|> e$B0J2<$N$h$&$J;EMM$r9M$($F$$$^$9!#e(B
|>
|> * default_internale$B$Oe(BIOe$B$Ge(Binternale$B$r;XDj$7$J$+$C$?>l9g$N%(%s%3!<e(B
|> e$B%G%#%s%0$G$"$ke(B
|
|internal e$B$r;XDj$7$J$+$C$?>l9g!"e(BIO#internal_encoding e$B$Oe(B nil e$B$N$^$^$Ge(B
|e$B$$$$$G$7$g$&$+!#e(B

default_internale$B$,e(Bnile$B$N;~!"e(B

open(path, “r”)

e$B$Oe(B

open(path, “r:default_external”)

e$B$H2r<a$5$l$^$9!#e(Bnile$B$G$J$$;~!"e(B

open(path, “r:default_external:internal_encoding”)

e$B$K$J$j$^$9!#e(B

|> * e$B?7@$Ne(B-Le$B%%W%7%g%s$r;XDj$9$k$He(Bdefault_externale$B$Oe(Blocalee$B!“e(B
|> default_internale$B$O6u$K$J$k!#e(B
|
|e$B$3$l$O$3$N$^$^$@$H$^$:$$$G$9!#e(B
|e$B$9$Y$F$,e(B UTF-8 e$B$J$i$P8@$&$^$G$bLdBj$”$j$^$;$s!#e(B
|e$B$7$+$7!"F~NO85!&=PNO@h!&%9%/%j%W%H$N%j%F%i%k$,A4$FNc$($Pe(B CP932 e$B$N>l9g!"e(B
|Ruby 1.9 e$B$G$OF~NO$H%j%F%i%k$r7k9g$G$-$^$;$s!#e(B
|e$B$3$l$,!"e(BPerl e$BEy$N>l9g$O%j%F%i%k$bJQ49$7$F$7$^$&$N$GLdBj$J$$$N$G$9$,!"e(B
|Ruby 1.9 e$B$G$Oe(B e$B%j%F%i%k$O$=$N$^$^$J$N$GIT0lCW$,H/@8$7$^$9!#e(B
|
|oneliner e$BEy$N4JC1$J%9%/%j%W%H$G%j%F%i%k$r$=$N$^$^G’<1$5$;$?$$>l9g$K!"e(B
|-L e$B0l$D$H$O$$$(%%W%7%g%s$,I,MW$H$$$&$N$OHQ;($G$O$J$$$G$7$g$&$+!#e(B
|
|e$B$3$l$N0l$D$N2r7h:v$O%j%F%i%k$be(B default_internal e$B$KJQ49$7$F$7$^$&$3$H$G$9!#e(B
|
|e$B$b$&0l$D$Oe(B default_internal e$B$N=i4|CM$r6u$K$7!"e(B
|Unicoder e$BMQ$N%*%W%7%g%s$r?7@$9$k$3$H$G$9e(B (e$B9,$$e(B -U e$B$,6u$$$F$$$^$9e(B)e$B!#e(B
|
|e$B;W$&$K!“e(BRuby e$B$OF|!9$N4JC1$J%9%/%j%W%H$K:GE,2=$5$l$k$Y$-$G$9!#e(B
|e$B$J$<$J$i$P!”$=$N$h$&$J>l9g$O=q$/@dBPNL!"=hM}$K$+$+$k@dBP;~4V$,C;$$$N$G!"e(B
|e$B:3:Y$J0c$$$N%$%s%Q%/%H$,Bg$-$$$+$i$G$9!#e(B
|
|e$BNc$($Pe(B ruby -pe’1’ < hoge.txt e$B$H$7$?$H$-$K!"e(B
|e$BL5BL$KJQ49$,e(B2e$B2sAv$k$N$O$$$+$,$J$b$N$+$H$+!“e(B
|e$B?t9T$N=q$-<N$F%9%/%j%W%H$G$$$A$$$Ae(B -L e$B;XDj$7$J$$$H$$$1$J$$$H$+!“e(B
|e$B?t9T$KBP$7$F$Ne(B " -L” e$B$J$N$G!”$^$!$=$l$J$j$K%$%s%Q%/%H$O!#e(B
|
|e$B0lJ}$Ne(B Unicode e$B$O4pK\E*$K5pBg$J2@Mu$rC[$/:]$K??2A$rH/4x$9$k$o$1$G!“e(B
|e$B$4$F$4$F$H%%W%7%g%s$r$D$1$5$;$k$N$OG:$_B?$-e(B Unicoder e$B$K$OHQ;($G$7$g$&$,!"e(B
|-U e$B%%W%7%g%s0l$D$J$i$PLdBj$J$$$s$8$c$J$$$+$”$!!#e(B

e$B$^$"!"e(B-Ue$B%*%W%7%g%s$O;d$b9M$($?$s$G$9$1$I$M!#$?$@!"7k6I!“e(B
default_internale$B$H$7$Fe(BUTF-8e$B$r!V?d>)!W$9$k$3$H$K$J$k$N$G!”$$$Ce(B
e$B$=$=$A$i$r%G%U%)%k%H$K$9$kJ}$,e(B{e$B$$$5$.$h$$e(B|e$B%H!<%?%k$N%3%9%H:oe(B
e$B8:$K$J$ke(B}e$B$H46$8$^$7$?!#e(B

e$B%j%F%i%k$N%(%s%3!<%G%#%s%0$K4X$9$k9M;!$,<e$+$C$?$N$OG’$a$k$Ne(B
e$B$G$9$,!“=q$-<N$F%9%/%j%W%H$N;Y1g$K4X$7$F$Oe(B -e e$B$G$Oe(B -L
e$B$b;XDje(B
e$B$7$?$3$H$K$9$ke(B(e$B$I$&$;F~NO$b%9%/%j%W%H$be(Blocalee$B$G$”$k$3$H$,4|e(B
e$BBT$5$l$ke(B)e$B!"$H$$$&$3$H$GBP1~$G$-$k$N$G$O$J$$$G$7$g$&$+!#e(B

|> e$B8=:_$G$O4pK\e(BUnicodee$B$G9=$o$J$$$H$O;W$$$^$9$,!"%Q%9L>$K$D$$$F$Oe(B
|> e$BJQ49$KH<$&%G!<%?%m%9$G%U%!%$%k$,8+$D$1$i$l$J$$;vBV$rHr$1$k$3e(B
|> e$B$H$r9M$($J$1$l$P$J$j$^$;$s!#>e$G$O!VL$Dj!W$H=q$$$F$$$^$9$,!"e(B
|> e$B!VJQ49$K<:GT$7$?;~$K$O%P%$%J%j!W$H$$$&$N$,8=<BE*$JBP=h$G$O$Je(B
|> e$B$$$+$H;W$$$^$9!#e(B
|
|e$BKh2se(B roundtrip e$B$9$k$3$H$r3NG’$7$^$9$+$M$'!#e(B
|e$B$G!"La$i$J$+$C$?$i85$Ne(B encoding e$B$N$^$^JV$9$H$+!#e(B
|ASCII-8BIT e$B$r$D$1$A$c$&$N$OITJX$J$s$8$c$J$$$+$H;W$$$^$9!#e(B

e$B3NG’$N<jCJ$O$H$b$+$/!“!V85$Ne(Bencodinge$B!W$H$Oe(Bdefault_externale$B$Ge(B
e$B$9$+$M!#$^$”!"$=$l$O$=$l$G$R$H$D$NA*Br;h$@$H$O;W$$$^$9!#e(B

|> * e$B4pK\e(BUTF-8e$B$rJV$;$P$h$$!"F~NO$be(BUTF-8e$B$r4|BTe(B
|> * e$B$h$j?F@Z$J%i%$%V%i%j$Oe(Bdefault_internale$B$GJV$9!#F~NO$Oe(B
|> encodinge$B$r8+$FBP=he(B
|
|default_internal e$B$,6u$N>l9g$Oe(B default_external e$B$GJV$9$N$G$9$+$M!#e(B

e$B$=$&$G$9!#e(B

                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

[drenovac]

e$B$3$s$K$A$O!"$J$+$`$ie(B(e$B$&e(B)e$B$G$9!#e(B

In message “[ruby-dev:36533] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Sep.25,2008 06:19:21, [email protected] wrote:
| e$B8D?ME*$K$O!Ve(BUTF-16e$B"*e(BUTF-8e$B"e(BUTF-16e$B!W%b%G%k$G==J,$G$“$j!”$+$De(B
| ASCIIe$B8_49LdBj$r2sHr$G$-$k$3$H$N4r$7$5$NJ}$,Bg$-$$$H;W$C$F$$$ke(B
| e$B$N$G$9$,e(B(e$B@55,I=8=$H$+$bHf3SE<+A3$K;H$($k$h$&$K$J$k$7e(B)e$B!“$$$d!“e(B
| e$B$=$l$G$be(BUTF-16e$B$r$=$N$^$^JQ49$J$7$K07$($kJ}$,NI$$$N$@$H$$$&$3e(B
| e$B$H$G$”$l$P!”$<$R;XE&$7$F$/$@$5$$!#e(B

e$B$“$s$^$j$3$&$$$&$3$H$r8@$&$N$O9%$-$G$O$J$$$N$G$9$,!”<B9TB.EYe(B
e$B$N%m%9$,GO</$K$J$j$^$;$s!#e(B
100MBe$B$Ne(BUTF-16LEe$B$J%F%-%9%H$+$i@55,I=8=%^%C%A$GI,MW$J9T$rH4$-=Pe(B
e$B$9$H$$$&=hM}$r9T$C$F$$$?$N$G$9$,!"e(BUTF-8e$B$X$NJQ49$r7PM3$9$k$3$He(B
e$B$K$h$C$F<B9T;~4V$,$*$h$=G$K$J$j$^$7$?!#e(B
(UTF-16LEe$B$N$^$^$Ge(B2e$BJ,DxEY!“e(BUTF-8e$B7PM3$Ge(B4e$BJ,DxEYe(B)
e$B<B:]$K$Oe(B100MBe$B$G$N;n9T7k2L$r85$K?t==e(BGBe$B$N%F%-%9%H$KBP$7$FF1Ey$Ne(B
e$B=hM}$r9T$C$?$N$G$9$,!”$3$l$re(BUTF-8e$B7PM3$G$d$C$F$$$?$i$H;W$&$H$>e(B
e$B$C$H$7$^$9!#e(B

UTF-16LEe$B$J@55,I=8=%*%V%8%'%/%H$N@8@.$K$D$$$F$Oe(Bencodee$B$r$+$^$9e(B
e$BI,MW$,$“$k$o$1$G3N$+$K$”$s$^$j<+A3$8$c$J$$$G$9$,!"$@$+$i@[email protected](B
e$B$G$-$J$$J}$,%^%7$H$$$&$[$IIT<+A3$H$O;W$C$F$$$^$;$s!#<g4Q$G$9e(B
e$B$1$I!#e(B

e$B$=$l$G$O!#e(B

[drenovac]

e$B$^$D$b$H$5$s!“@.@%$5$s!”$3$s$K$A$O!#e(B

e$B@.@%$5$s$HF146$NE@$,$"$j$^$9!#2<$r8+$F$/$@$5$$!#e(B

At 06:31 08/09/25, NARUSE, Yui wrote:

|> e$B$NDs0F$,$“$j$^$7$?!#e(B
|
|e$B$^$D$b$H$5$s$KCk$4$mJ9$$$?$H$3$m!”$^$@;W0FCf$N$h$&$G$9!#e(B
|
|e$B7k6Ie(B default_internal e$B$C$F$N$Oe(B multi-locale e$B$r;X8~$9$ke(B
|Ruby e$B$+$i$9$k$H5U9T$9$kB8:_$J$N$G!“Fq$7$$$H$3$m$G$O$”$j$^$9!#e(B

e$B:#F|0lF|9M$($F!"F3F~$9$k$3$H$K$7$^$7$?!#e(B

e$B$"$j$,$H$&$4$6$$$^$7$?!#e(B

• (e$B=EMWe(B)e$B$J$K$b;XDj$7$J$$>l9g$Ne(Bdefault_externale$B$Oe(Blocalee$B!#e(B
  default_internale$B$O!Ve(BUTF-8e$B!W!#e(B

• e$B?7@_$Ne(B-Le$B%*%W%7%g%s$r;XDj$9$k$He(Bdefault_externale$B$Oe(Blocalee$B!"e(B
  default_internale$B$O6u$K$J$k!#e(B

e$B$3$l$O$3$N$^$^$@$H$^$:$$$G$9!#e(B
e$B$9$Y$F$,e(B UTF-8 e$B$J$i$P8@$&$^$G$bLdBj$"$j$^$;$s!#e(B
e$B$7$+$7!"F~NO85!&=PNO@h!&%9%/%j%W%H$N%j%F%i%k$,A4$FNc$($Pe(B CP932 e$B$N>l9g!"e(B
Ruby 1.9 e$B$G$OF~NO$H%j%F%i%k$r7k9g$G$-$^$;$s!#e(B

e$B$3$l$O:,K\E*$JLdBj$J$N$+!“!Ve(B-L e$B$r;XDj$7$J$$8B$j!W$J$N$+e(B?
e$B8e<T$@$H;W$$$^$9$,!”@.@%$5$s!"3NG’$G$-$^$9$+!#e(B

e$B$3$l$,!"e(BPerl e$BEy$N>l9g$O%j%F%i%k$bJQ49$7$F$7$^$&$N$GLdBj$J$$$N$G$9$,!"e(B
Ruby 1.9 e$B$G$Oe(B e$B%j%F%i%k$O$=$N$^$^$J$N$GIT0lCW$,H/@8$7$^$9!#e(B

oneliner e$BEy$N4JC1$J%9%/%j%W%H$G%j%F%i%k$r$=$N$^$^G’<1$5$;$?$$>l9g$K!"e(B
-L e$B0l$D$H$O$$$(%*%W%7%g%s$,I,MW$H$$$&$N$OHQ;($G$O$J$$$G$7$g$&$+!#e(B

e$B$=$&$G$9$M!#e(B

e$B$3$l$N0l$D$N2r7h:v$O%j%F%i%k$be(B default_internal e$B$KJQ49$7$F$7$^$&$3$H$G$9!#e(B

e$B$b$&0l$D$Oe(B default_internal e$B$N=i4|CM$r6u$K$7!"e(B
Unicoder e$BMQ$N%*%W%7%g%s$r?7@_$9$k$3$H$G$9e(B (e$B9,$$e(B -U e$B$,6u$$$F$$$^$9e(B)e$B!#e(B

e$B$3$l$O$$$$%“%$%G%#%”$@$H;W$$$^$9!#e(B

e$B;W$&$K!“e(BRuby e$B$OF|!9$N4JC1$J%9%/%j%W%H$K:GE,2=$5$l$k$Y$-$G$9!#e(B
e$B$J$<$J$i$P!”$=$N$h$&$J>l9g$O=q$/@dBPNL!"=hM}$K$+$+$k@dBP;~4V$,C;$$$N$G!"e(B
e$B:3:Y$J0c$$$N%$%s%Q%/%H$,Bg$-$$$+$i$G$9!#e(B

e$BNc$($Pe(B ruby -pe’1’ < hoge.txt e$B$H$7$?$H$-$K!"e(B
e$BL5BL$KJQ49$,e(B2e$B2sAv$k$N$O$$$+$,$J$b$N$+$H$+!"e(B

e$B$3$l$O$=$l$[$I$NLdBj$G$O$J$$$H;W$$$^$9!#e(B

e$B?t9T$N=q$-<N$F%9%/%j%W%H$G$$$A$$$Ae(B -L e$B;XDj$7$J$$$H$$$1$J$$$H$+!“e(B
e$B?t9T$KBP$7$F$Ne(B " -L” e$B$J$N$G!"$^$!$=$l$J$j$K%$%s%Q%/%H$O!#e(B

e$B$=$&$G$9$M!#$b$&0l$D$A$g$C$H?4G[$J$N$Oe(B 1.8 e$B$H$N8_49@-$G$9!#e(B
-L e$B$NF3F~$G$=$Ne(B -L e$B$rIU$1$k$+$I$&$+$J$I$N:n6H$,H/@8$7$^$9!#e(B

e$B0lJ}$Ne(B Unicode e$B$O4pK\E*$K5pBg$J2@Mu$rC[$/:]$K??2A$rH/4x$9$k$o$1$G!“e(B
e$B$4$F$4$F$H%%W%7%g%s$r$D$1$5$;$k$N$OG:$_B?$-e(B Unicoder e$B$K$OHQ;($G$7$g$&$,!"e(B
-U e$B%%W%7%g%s0l$D$J$i$PLdBj$J$$$s$8$c$J$$$+$”$!!#e(B

e$B$=$&$G$9$M!#e(B

e$BKh2se(B roundtrip e$B$9$k$3$H$r3NG’$7$^$9$+$M$'!#e(B
e$B$G!"La$i$J$+$C$?$i85$Ne(B encoding e$B$N$^$^JV$9$H$+!#e(B
ASCII-8BIT e$B$r$D$1$A$c$&$N$OITJX$J$s$8$c$J$$$+$H;W$$$^$9!#e(B

e$B$3$l$OHyL/$JLdBj$G$9!#$J$<$J$iJQ49$G$-$J$$$N$O7k9=>/$J$/!“e(B
e$B$?$^$K$7$+5/$3$i$J$$LdBj$3$=Fq$7$$LdBj$O$”$j$^$;$s!#e(B

e$B$3$N7k2L!"3F<o%i%$%V%i%j$Oe(B

• e$B4pK\e(BUTF-8e$B$rJV$;$P$h$$!"F~NO$be(BUTF-8e$B$r4|BTe(B
• e$B$h$j?F@Z$J%i%$%V%i%j$Oe(Bdefault_internale$B$GJV$9!#F~NO$Oe(B
  encodinge$B$r8+$FBP=he(B

e$B$3$3$O$A$g$C$H?4G[$N$H$3$m$G$9!#FC$K309q$N%W%m%0%i%^$Oe(B
e$B!VA4Ite(B UTF-8 e$B$G$d$C$F$7$^$&!WF08~$,6/$$$G$7$g$&!#e(B
e$B$=$l$G$$$$$H$$$&2DG=@-$b$“$j$^$9$,!”$=$&$G$O$J$$2DG=@-$be(B
e$B$"$j$^$9!#e(B

default_internal e$B$,6u$N>l9g$Oe(B default_external e$B$GJV$9$N$G$9$+$M!#e(B

e$B%Q%C%A$r:n$C$?$H$-$K!"!Ve(Bdefault_internal e$B$,6u$J$ie(B
default_externale$B!We(B
e$B$rJV$95!G=$NI,MW@-$r46$8;O$a$^$7$?!#e(B

e$B59$7$/$*4j$$$7$^$9!#e(B Martin.

#-#-# Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-# http://www.sw.it.aoyama.ac.jp mailto:[email protected]

[drenovac]

At 00:39 08/09/25, Tanaka A. wrote:

Encoding.default_internal = ‘utf-8’
# tested with ‘utf-8’, ‘shift_jis’, and ‘euc-jp’

e$BJQ992DG=$H$9$k$3$H$K$D$$$F$O!"%9%l%C%I%;!<%U$G$J$$$3$H$K2??Me(B
e$B$b7|G0$rI=L@$7$F$$$^$9$M!#;d$b4m$&$$$H;W$$$^$9!#e(B

e$B%9%l%C%IKh$K$9$k$K$OLdBj$J$$$H;W$$$^$9!#$7$+$7e(B default_external
e$B$b8=:_%9%l%C%IKh$K$J$C$F$J$$$G$9$h$M!#<BAuE*$K$OFq$7$$$G$7$g$&$+!#e(B

e$B$^$?!“JQ49$9$k$N$K$O$=$l$O$=$l$G6lO+$,$”$k$s$8$c$J$$$G$7$g$&e(B
e$B$+!#e(B

e$B$?$H$($P!"e(BPython 3000 e$B$G$O!“e(Bargv e$B$KJQ$J%P%$%HNs$,M?$($i$l$?e(B
e$B>l9g$K5/F0;~$K%(%i!<$K$J$k$H$$$&OC$,$”$j$^$7$?!#e(B
[Python-3000] Unicode and OS strings
(e$B8=:_$I$&$J$C$F$$$k$+$O3NG’$7$F$$$^$;$s!#e(B)

e$BJQ49$9$k$H$$$&$3$H$O<:GT$9$k2DG=@-$,M-$k$o$1$G!“<:GT$r$&$^$/e(B
e$B07$($k$+9M$($F$_$kI,MW$,$”$k$N$G$O$J$$$G$7$g$&$+!#e(B

e$B$=$&$G$9$M!#e(Bargv e$B$NJQ49$G$-$J$$$b$N$re(B ASCII-8BIT
e$B$K$9$k$N$Oe(B

• e$B$=$3$^$GBP1~$9$kI,MW$,$"$k>l9g!"BP1~$G$-$ke(B
• e$BBP1~$7$J$$$H$$$:$l$I$3$+%(%i!<$K$J$ke(B
  e$B$H$$$&0UL#$G3d$j$H$$$$$?$$:v$@$H;W$$$^$9!#e(B

e$B59$7$/$*4j$$$7$^$9!#e(B Martin.

#-#-# Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-# http://www.sw.it.aoyama.ac.jp mailto:[email protected]

[drenovac]

e$B$J$+$`$i$5$s!"$3$s$K$A$O!#e(B

e$B0lHLE*$K$Oe(B Ruby e$B$Ne(B UTF-16 e$B$N=hM}$OB.$/$“$j$^$;$s!#e(B
e$B$J$<$J$ie(B 1e$B%P%$%H$4$H$K=hM}$7$F$$$^$9!#e(B
[e$B54<V$O$=$N$X$s0c$&$+$b$7$l$^$;$s!#e(B]
e$B99$K!“JQ49$O!VJ8;z$4$H$K>.$5$$4X?t$r8F$V!W$3$He(B
e$B$K$J$C$F$$$^$9$N$G!”$=$N$?$a$KCY$$$H$$$&2DG=@-e(B
e$B$b$”$j$^$9!#e(B(e$B$=$&$G$J$$2DG=@-$b$“$j$^$9e(B)
e$B$=$l0J30$K$b9M$($i$l$k$3$H$OMM!9e(B (e$BNc$($P@55,I=8=e(B
e$B$,$I$N$0$i$$J#;($b$N$J$N$+e(B) e$B$J$N$G!”$b$7$b$&>/$7e(B
e$B>$7$$>pJs$,$"$j$^$7$?$i@'Hs65$($F$/$@$5$$!#e(B

e$B59$7$/$*4j$$$7$^$9!#e(B Martin.

At 07:12 08/09/25, U.Nakamura wrote:

e$B$“$s$^$j$3$&$$$&$3$H$r8@$&$N$O9%$-$G$O$J$$$N$G$9$,!”<B9TB.EYe(B
e$BI,MW$,$“$k$o$1$G3N$+$K$”$s$^$j<+A3$8$c$J$$$G$9$,!"$@$+$i@[email protected](B
e$B$G$-$J$$J}$,%^%7$H$$$&$[$IIT<+A3$H$O;W$C$F$$$^$;$s!#<g4Q$G$9e(B
e$B$1$I!#e(B

e$B$=$l$G$O!#e(B

U.Nakamura [email protected]

#-#-# Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-# http://www.sw.it.aoyama.ac.jp mailto:[email protected]

[drenovac]

e$B$3$s$K$A$O!"$J$+$`$ie(B(e$B$&e(B)e$B$G$9!#e(B

In message “[ruby-dev:36545] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Sep.25,2008 10:38:35, [email protected] wrote:

e$B0lHLE*$K$Oe(B Ruby e$B$Ne(B UTF-16 e$B$N=hM}$OB.$/$“$j$^$;$s!#e(B
e$B$J$<$J$ie(B 1e$B%P%$%H$4$H$K=hM}$7$F$$$^$9!#e(B
[e$B54<V$O$=$N$X$s0c$&$+$b$7$l$^$;$s!#e(B]
e$B99$K!“JQ49$O!VJ8;z$4$H$K>.$5$$4X?t$r8F$V!W$3$He(B
e$B$K$J$C$F$$$^$9$N$G!”$=$N$?$a$KCY$$$H$$$&2DG=@-e(B
e$B$b$”$j$^$9!#e(B(e$B$=$&$G$J$$2DG=@-$b$“$j$^$9e(B)
e$B$=$l0J30$K$b9M$($i$l$k$3$H$OMM!9e(B (e$BNc$($P@55,I=8=e(B
e$B$,$I$N$0$i$$J#;($b$N$J$N$+e(B) e$B$J$N$G!”$b$7$b$&>/$7e(B
e$B>$7$$>pJs$,$"$j$^$7$?$i@'Hs65$($F$/$@$5$$!#e(B

e$BF~NO%F%-%9%H$O4pK\E*$Ke(B0x0000e$B!Ae(B0x007Fe$B$NHO0O$G$9e(B(e$B$J$s$Ge(BUTF-16e$B$Je(B
e$B$s$@$h$C$F46$8$G$9$,e(B)e$B!#e(B
e$B$@$$$?$$e(B50e$BJ8;z!Ae(B100e$BJ8;zDxEY$ND9$5$N9T$rC10L$K$7$F@55,I=8=%^%Ce(B
e$B%A$r9T$C$F$$$^$9!#e(B
e$B@55,I=8=$Oe(B1e$B7o$N%0%k!<%W2=$r4^$`$@$1$NC1=c$J$b$N$G$9!#e(B
e$B$A$J$_$K@55,I=8=%^%C%A<+BN$O$3$N%1!<%9$G$Oe(BUTF-8e$B$NJ}$,<c43B.$+e(B
e$B$C$?$G$9e(B(e$B$[$\8m:9$NHO0O$G$9$,e(B)e$B!#e(B

e$B$H$$$&$o$1$Ge(B2e$BG$NB.EY:9$H$$$&$N$O$[$\A4$FJQ49Ii2Y$@$H$$$&$3$He(B
e$B$K$J$j$^$9!#e(B

e$B$=$l$G$O!#e(B

[drenovac]

Yuguie$B$G$9!#e(B

Yukihiro M. e$B$5$s$O=q$-$^$7$?e(B:

open(path, “r:default_external:internal_encoding”)
e$B$3$l$O!"e(Bdefault_internale$B$,e(Bnile$B$G$J$$%W%m%;%9$+$ie(Brequiree$B$5$l$?%i%$%V%i%je(B
e$B$,!"e(Bopen(path,
“r”)e$B$K$h$C$F85$N%j%=!<%9$H$O%P%$%HNs$H$7$F0[$J$k$b$N$rF@e(B
e$B$k$3$H$K$J$j$^$9!#$G$9$+$i!"e(B1.8e$B$+$i$N%i%$%V%i%j$N0\9T$r>/$7$@$1:$Fq$K$7e(B
e$B$^$9!#e(B

e$B$^$?!"e(Bdefault_internale$B$,e(Bnile$B$G$J$$$H$-$Ke(B

open(path, “r:default_external”)

e$B$,e(B

open(path, “r:default_external:default_internal”)

e$B$H2r<a$5$l$k$3$H$O$J$$$N$G$9$Me(B?
"mode:external:internal"e$B$,4pK\7A$G!"e(B
e$B>JN,$9$k$H%G%U%)%k%H$,F~$k$H$$$&;EMM$N$[$&$,J,$+$j$d$9$$$H46$8$^$9!#e(B

e$B$?$@$7!"$=$N$h$&$K$9$k$He(Bdefault_externale$B$r$=$N$^$^<h$j9~$`$3$H$r4|BT$7$Fe(B
e$B$$$kJ8;zJQ49=hM}7O$N%i%$%V%i%j$O3+$$$?$"$H$K99$Ke(Binternale$B$r@_Dj$7$J$$$H$$e(B
e$B$1$J$/$J$C$FLLE]$K$J$k!"$H$$$&LdBj$O$"$j$^$9!#e(B

e$B$=$3$G!"3+H/2q5D$G$*OC$7$7$?$h$&$Je(B
Encoding.with_internal(Encoding::UTF8) {
open(path, “r:external”)
}

e$B$_$?$$$J$d$jJ}$d%^%8%C%/%3%a%s%H$G;XDj$9$k$H$$$&$d$jJ}$"$k$o$1$G$9$1$l$Ie(B
e$B$b!#$3$l$O$3$l$GJ#;($G$9$h$M!#FCDj$NJQ49$r!"$"$k$$$OJQ49$5$l$J$$$3$H$r4|e(B
e$BBT$9$k%i%$%V%i%j<BAu$O$I$N$h$&$K$7$?$i$h$$$b$N$G$7$g$&$+!#e(B

[drenovac]

e$B$J$+$@$G$9!#e(B

At Thu, 25 Sep 2008 00:49:10 +0900,
Yukihiro M. wrote in [ruby-dev:36523]:

• default_internale$B$Oe(BIOe$B$Ge(Binternale$B$r;XDj$7$J$+$C$?>l9g$N%(%s%3!<e(B
  e$B%G%#%s%0$G$"$ke(B
• e$B$3$l$,;XDj$5$l$F$$$k;~e(BIOe$B$+$i$NF~NO$Oe(B(e$B%P%$%J%j$G$J$$8B$je(B)e$B!"e(B
  e$B$3$N%(%s%3!<%G%#%s%0$r;}$De(B(e$BI,MW$J$iJQ49$9$ke(B)e$B!#e(B

e$BJQ49$r$5$;$k$J$iJQ49$r;XDj$9$k$[$&$,$$$$$s$8$c$J$$$G$7$g$&$+!#$?e(B
e$B$H$($Pe(Binternale$B$r6u$K$7$?$H$-$K$Oe(Bdefaulte$B$r;H$&$H$+!#e(B

e$B$N$h$&$K=q$/!#5U$Ke(Bdefault_internale$B$X$NJQ49$rM^@)$9$k$?$a$Ke(B
e$B$O!"6u$Ne(Bdefault_internale$B$r;XDj$7$Fe(B

-E iso-2022-jp:

e$B$N$h$&$K=q$/!#5lMh$N!Ve(B-E euc-jpe$B!W$O!Ve(B-E euc-jp:e$B!W$HF1$80Ue(B
e$BL#$K$J$k!#e(B

e$B!Ve(B:e$B!W$J$7$Ge(B -E euc-jp
e$B$J$I$H;XDj$7$?>l9g$O$I$&$J$k$s$G$7$g$&$+!#e(B
e$B$^$?!"e(Binternale$B$He(Bexternale$B$=$l$>$l$@$1$r;XDj$9$k%*%W%7%g%s$rJ#?t;Xe(B
e$BDj$7$?>l9g$H$+!#e(B

[drenovac]

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36535] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Thu, 25 Sep 2008 06:39:14 +0900, Hidetoshi NAGAI
[email protected] writes:

|> e$B:#F|0lF|9M$($F!“F3F~$9$k$3$H$K$7$^$7$?!#e(B
|
|e$B:Y$+$$;EMM$K4X$7$F$O?'!9$H0U8+$O$”$k$h$&$G$9$,!$e(B
|e$B;d<+?H$O>/$J$/$H$be(B default_internal e$B$NF3F~<+BN$O4?7^$7$^$9!%e(B
|
|# e$B@N$*4j$$$7$?$1$l$I$b!V%0%m!<%P%k$J>uBV$OF~$l$J$$!W$H$$$&$3$H$Ge(B
|# e$B6/$/5q@d$5$l$?$b$N$H;w$F$$$k$h$&$J5$$b$7$J$$$G$O$J$$$G$9$,!%e(B(^_^;

(e$BDs0F$5$l$?%Q%C%A$H0c$C$Fe(B)e$B;d$N;EMM$G$Oe(Bdefault_encodinge$B$O5/F0e(B
e$B;~$K7h$^$j!“>/$J$/$H$be(BRubye$B%l%Y%k$G$OJQ99$G$-$^$;$s!#$N$G!”>ue(B
e$BBV$G$O$J$$$G$9$M!#0JA0$KH?BP$7$F$$$?$N$O;v<B$G!"$=$l$r9M$($ke(B
e$B$H$b$&$7$o$1$J$$$H;W$$$^$9!#e(B

|> * e$B$3$l$,;XDj$5$l$F$$$k;~e(BIOe$B$+$i$NF~NO$Oe(B(e$B%P%$%J%j$G$J$$8B$je(B)e$B!"e(B
|> e$B$3$N%(%s%3!<%G%#%s%0$r;}$De(B(e$BI,MW$J$iJQ49$9$ke(B)e$B!#e(B
|
|e$B30It$N%i%$%V%i%j$H$N$d$j<h$j$be(B IO e$B$K=`$:$k$b$N$He(B
|e$B9M$($F$b$h$$$G$9$h$M!)e(B

e$B$=$&$G$9!#%i%$%V%i%j$N>l9g$KBP1~$K$D$$$F$O2<$K<($7$?DL$j$K$Je(B
e$B$j$^$9!#e(B

|> e$B$3$N7k2L!"3F<o%i%$%V%i%j$Oe(B
|>
|> * e$B4pK\e(BUTF-8e$B$rJV$;$P$h$$!"F~NO$be(BUTF-8e$B$r4|BTe(B
|> * e$B$h$j?F@Z$J%i%$%V%i%j$Oe(Bdefault_internale$B$GJV$9!#F~NO$Oe(B
|> encodinge$B$r8+$FBP=he(B
|>
|> e$B$H$$$&FsCJ3,BP1~$,$G$-$^$9!#CJ3,E*$KA0<Te(B(e$B%l%Y%ke(B1)e$B$+$i!“8e<Te(B
|> (e$B%l%Y%ke(B2)e$B$K0\9T$9$l$P$h$$$N$G$O$J$$$G$7$g$&$+!#e(B
|
|e$B30It$N%i%$%V%i%j$rMQ$$$k3HD%%i%$%V%i%j$H$7$F$O!$e(B
|default_internal e$B$,6u$G$J$1$l$Pe(B default_internal e$B$G!$e(B
|default_internal e$B$,6u$G$”$k$J$ie(B default_extenral e$B$Ge(B
|e$BJV$9$h$&$K$9$k$H$$$&$N$,4pK$G$7$g$&$+!)e(B

e$B$O$$!#$=$&$J$j$^$9!#>e5-$N$[$+$K%i%$%V%i%j$K$h$C$F$O!“M?$($ie(B
e$B$l$?%G!<%?e(B(e$BJ8;zNse(B)e$B$N%(%s%3!<%G%#%s%0$r$=$N$^$^JV$9$H$$$&%*%&e(B
e$B%`JV$7%?%$%W$N$b$N$,$”$j$($k$G$7$g$&$M!#e(B

|e$B3HD%%i%$%V%i%jB&$Oe(B core e$B$N;EMM$,3NDj$7$J$$$HF0$-$E$i$$$G$9!%e(B
|e$B$G!$e(Bfeature freeze e$B$,6a$E$$$F$+$ie(B core e$B$,?'!9$H$$$8$i$l$k$He(B
|e$BBP1~$,A4$/4V$K9g$$$^$;$s!%e(B
|
|# e$B!V$9$Y$F$NJQ99$KB(:B$KBP1~$7B3$1$k!W$H$$$&$N$O!$e(B
|# e$B$5$9$,$K$4MF<O$r!%e(B(^_^)
|
|e$B$b$72DG=$G$"$k$J$i!$%j%j!<%9%9%1%8%e!<%k$K$*$$$F!$e(B
|core e$B$Ne(B feature freeze e$B$+$ie(B ext e$B$Ne(B feature freeze e$B$^$G$Ke(B
|e$B>/$74V$r6u$1$F$$$?$@$1$k$H=u$+$j$^$9!%e(B

e$B$3$l$K$D$$$F$b?=$7Lu$J$/;W$$$^$9!#e(BYuguie$B$5$s$H$O$^$@$A$c$s$He(B
e$BOC$7$F$$$^$;$s$,!":#2s$NJQ99$K$D$$$F$NBP1~$Oe(Bfreezee$B$NBP>]$G$Oe(B
e$B$J$$$H$$$&$3$H$K$G$-$?$i$$$$$H;W$C$F$$$^$9!#$G$-$l$Pe(B1e$B%v7n$/e(B
e$B$i$$$N4|4V$G!#e(B

                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

[drenovac]

e$B$^$D$b$He(B e$B$f$-$R$m$G$9e(B

In message “Re: [ruby-dev:36548] Re: Encoding.default_internal
e$B$N$?$a$N%Q%C%Ae(B”
on Thu, 25 Sep 2008 12:16:10 +0900, “Yugui (Yuki S.)”
[email protected] writes:

|> open(path, “r”)
|> e$B$Oe(B
|> open(path, “r:default_external”)
|> e$B$H2r<a$5$l$^$9!#e(Bnile$B$G$J$$;~!"e(B
|>
|> open(path, “r:default_external:internal_encoding”)
|
|e$B$3$l$O!"e(Bdefault_internale$B$,e(Bnile$B$G$J$$%W%m%;%9$+$ie(Brequiree$B$5$l$?%i%$%V%i%je(B
|e$B$,!"e(Bopen(path, “r”)e$B$K$h$C$F85$N%j%=!<%9$H$O%P%$%HNs$H$7$F0[$J$k$b$N$rF@e(B
|e$B$k$3$H$K$J$j$^$9!#$G$9$+$i!"e(B1.8e$B$+$i$N%i%$%V%i%j$N0\9T$r>/$7$@$1:$Fq$K$7e(B
|e$B$^$9!#e(B

e$B$=$&$G$9$M!#$=$l$O;v<B$G$9!#e(B

|e$B$^$?!"e(Bdefault_internale$B$,e(Bnile$B$G$J$$$H$-$Ke(B
|
| open(path, “r:default_external”)
|
|e$B$,e(B
|
| open(path, “r:default_external:default_internal”)
|
|e$B$H2r<a$5$l$k$3$H$O$J$$$N$G$9$Me(B? "mode:external:internal"e$B$,4pK\7A$G!"e(B
|e$B>JN,$9$k$H%G%U%)%k%H$,F~$k$H$$$&;EMM$N$[$&$,J,$+$j$d$9$$$H46$8$^$9!#e(B

e$B$3$l$O$=$N$h$&$K2r<a$5$l$?J}$,NI$$$H;W$$$^$9!#$D$^$j!"e(B

| open(path, “r:default_external”)
|e$B$,e(B
| open(path, “r:default_external:default_internal”)

e$B$H$$$&$3$H$G$9!#e(B

|e$B$?$@$7!“$=$N$h$&$K$9$k$He(Bdefault_externale$B$r$=$N$^$^<h$j9~$`$3$H$r4|BT$7$Fe(B
|e$B$$$kJ8;zJQ49=hM}7O$N%i%$%V%i%j$O3+$$$?$”$H$K99$Ke(Binternale$B$r@_Dj$7$J$$$H$$e(B
|e$B$1$J$/$J$C$FLLE]$K$J$k!“$H$$$&LdBj$O$”$j$^$9!#e(B

e$B$=$NLdBj$O$"$j$^$9$M!#e(B

|e$B$=$3$G!“3+H/2q5D$G$*OC$7$7$?$h$&$Je(B
|Encoding.with_internal(Encoding::UTF8) {
| open(path, “r:external”)
|}
|
|e$B$_$?$$$J$d$jJ}$d%^%8%C%/%3%a%s%H$G;XDj$9$k$H$$$&$d$jJ}$”$k$o$1$G$9$1$l$Ie(B
|e$B$b!#$3$l$O$3$l$GJ#;($G$9$h$M!#FCDj$NJQ49$r!“$”$k$$$OJQ49$5$l$J$$$3$H$r4|e(B
|e$BBT$9$k%i%$%V%i%j<BAu$O$I$N$h$&$K$7$?$i$h$$$b$N$G$7$g$&$+!#e(B

e$B$A$g$C$H6l$7$$$G$9$,!"e(B

open(path, “r:default_external:”)

e$B$C$F$N$O$I$&$G$7$g$&$+$M!#$“$”!“$”$He(B

open(path, “r:ascii-8bit”)

e$B$@$1$Oe(Bdefault_internale$B$,$J$s$G$"$m$&$H$=$N$^$^FI$_9~$s$@J}$,e(B
e$B$h$$$G$7$g$&$M!#e(B

                            e$B$^$D$b$He(B e$B$f$-$R$me(B /:|)

[drenovac]

At 14:30 08/09/25, Nobuyoshi N. wrote:

e$B$J$+$@$G$9!#e(B

At Thu, 25 Sep 2008 00:49:10 +0900,
Yukihiro M. wrote in [ruby-dev:36523]:

e$B$N$h$&$K=q$/!#5U$Ke(Bdefault_internale$B$X$NJQ49$rM^@)$9$k$?$a$Ke(B
e$B$O!"6u$Ne(Bdefault_internale$B$r;XDj$7$Fe(B

-E iso-2022-jp:

e$B$N$h$&$K=q$/!#5lMh$N!Ve(B-E euc-jpe$B!W$O!Ve(B-E euc-jp:e$B!W$HF1$80Ue(B
e$BL#$K$J$k!#e(B

e$B!Ve(B:e$B!W$J$7$Ge(B -E euc-jp e$B$J$I$H;XDj$7$?>l9g$O$I$&$J$k$s$G$7$g$&$+!#e(B

e$BD>A0$K=q$$$?$h$&$Ke(B -E euc-jp: e$B$HF1$80UL#$K$J$k!#e(B

e$B$^$?!"e(Binternale$B$He(Bexternale$B$=$l$>$l$@$1$r;XDj$9$k%*%W%7%g%s$rJ#?t;Xe(B
e$BDj$7$?>l9g$H$+!#e(B

e$B3N$+$K!“Nc$($P%3%^%s%I%i%$%s$Ge(B -E
shift_jise$B!”%9%/%j%W%H$NCf$Ge(B
#!/usr/bin/ruby -E :utf-8 e$B$H$+$H$$$&AH$_9g$o$;$r9M$($J$$$He(B
e$B$$$1$^$;$s$h$M!#e(B

e$B59$7$/$*4j$$$7$^$9!#e(B Martin.

#-#-# Martin J. Du"rst, Assoc. Professor, Aoyama Gakuin University
#-#-# http://www.sw.it.aoyama.ac.jp mailto:[email protected]