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akyahoo
Joined: 10 Nov 2009
Posts: 24
Location: Beijing, China
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 Posted: Wed Nov 11, 2009 11:35 am Post subject: Why .txt file becomes ANSI after removing BOM? |
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I use AkelPad to save a .txt file as UTF-8. The BOM is removed.
Later, I use Windows Notepad to open it. It shows its encoding is ANSI, not UTF-8. Why? |
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FeyFre
Joined: 07 Aug 2007
Posts: 2234
Location: Vinnitsa, Ukraine
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| Posted: Wed Nov 11, 2009 1:02 pm Post subject: |
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akyahoo
Because latin 1 subset of UTF-8 encoding is egual to ANSI's latin-1 Encoding (Windows 1252): they both uses byte range [0-127]. And so texts UTF-8 w/o BOM and ANSI 1252 are binary equal. And Notepad has no any idea what was this or that text.
If you will try to to save UTF-8 text which contains Cyrillic chars w/o BOM, you`ll notice that those chars represented by two bytes, and the any smart-enought text editor(don't know if Notepad is) will analyze those pairs and correctly decide that text is in BOM-less UTF-8 encoding. |
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akyahoo
Joined: 10 Nov 2009
Posts: 24
Location: Beijing, China
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| Posted: Thu Nov 19, 2009 3:09 am Post subject: |
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| FeyFre wrote: | akyahoo
Because latin 1 subset of UTF-8 encoding is egual to ANSI's latin-1 Encoding (Windows 1252): they both uses byte range [0-127]. And so texts UTF-8 w/o BOM and ANSI 1252 are binary equal. And Notepad has no any idea what was this or that text.
If you will try to to save UTF-8 text which contains Cyrillic chars w/o BOM, you`ll notice that those chars represented by two bytes, and the any smart-enought text editor(don't know if Notepad is) will analyze those pairs and correctly decide that text is in BOM-less UTF-8 encoding. |
Thank you. |
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