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円記号(U+00a5)の変換 (2010-06-19 20:22 by Anonymous #51410)

U+00a5（円記号）をほかのコードに変換すると、全角の円記号（例えば、EUCなら0xA1EF）になりますが、0x5cに変換するオプションはありますでしょうか。
一部のアプリケーションで Shift_JIS のテキストを UTF に変換したときに、0x5c を U+00a5 にしてしまうものがあって困っています。

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RE: 円記号(U+00a5)の変換 (2010-06-19 21:06 by naruse #51413)

--cp932 で変換されます。
ただ、いくつかほかの文字も一緒に変換されてしまうのでそこはご留意のほどを。
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RE: 円記号(U+00a5)の変換 (2010-06-19 22:36 by Anonymous #51415)

ありがとうございました。
--cp932 で変換した後にさらに -e で EUC にしようかと思いましたが、--oc=CP51932 でもよいのでしょうか。
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RE: 円記号(U+00a5)の変換 (2010-06-19 23:18 by naruse #51416)

Windows風にシフトJISからEUCにしたい場合でしたら、
--ic=CP932 --oc=CP51932 がよいですね
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RE: 円記号(U+00a5)の変換 (2010-06-20 00:04 by Anonymous #51419)

やりたいことは、文字コードが不明なテキスト（たくさん）をバッチで処理して、ISO-2022-JP で定義されるコードに収まっている EUC に統一することです。
今まで教えていただいたことをもとにすると
-I --oc=CP51932
で目的は達成できそうですね。

ところで、CP932 や CP51932 を指定しなければ、U+00a5 が区点コード 0179 の全角の円記号に変換されるのはどうしてなのでしょうか。
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RE: 円記号(U+00a5)の変換 (2010-06-20 04:56 by naruse #51425)

CP932などを指定しなかった場合はJIS風の変換になります。
また、nkfでは0x00-0x7Fの範囲は常にASCIIであると仮定します。
結果、U+00A5はJIS X 0208の円記号、つまり全角円記号になります。

などと理屈はつけられますが、端的に言えば昔そうなってて、
今も互換性のためにそのままになっている、というのが本質ですね。
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RE: 円記号(U+00a5)の変換 (2010-06-20 23:01 by Anonymous #51444)

どうもありがとうございました。勉強になりました。
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