Re: Character with codepoint #o223 is displayed as \223, do I have a font problem?

[Eli Zaretskii]

> From: nljlistbox2@gmail.com (N. Jackson)
> Date: Fri, 18 Mar 2016 12:17:58 -0300
> 
> I'm finding that the name "Oscar" (with an accent on the initial letter)
> is displayed as
> 
>     Óscar
> 
> That first character (the accented A) is:
> 
>                  position: 258 of 309 (83%), column: 41
>                 character: Ã (displayed as Ã) (codepoint 195, #o303, #xc3)
>         preferred charset: unicode (Unicode (ISO10646))
>     code point in charset: 0xC3
>                    script: latin
>                    syntax: w  which means: word
>                  category: .:Base, L:Left-to-right (strong), j:Japanese, 
> l:Latin, v:Viet
>                  to input: type "C-x 8 RET c3" or "C-x 8 RET LATIN CAPITAL 
> LETTER A WITH TILDE"
>               buffer code: #xC3 #x83
>                 file code: #xC3 #x83 (encoded by coding system utf-8-unix)
>                   display: by this font (glyph code)
>         xft:-PfEd-DejaVu Sans 
> Mono-normal-normal-normal-*-12-*-*-*-m-0-iso10646-1 (#x85)
> 
>     Character code properties: customize what to show
>       name: LATIN CAPITAL LETTER A WITH TILDE
>       old-name: LATIN CAPITAL LETTER A TILDE
>       general-category: Lu (Letter, Uppercase)
>       decomposition: (65 771) ('A' '̃')
> 
>     There are text properties here:
>       fontified            t
> 
> and the second character is:
> 
>                  position: 259 of 309 (83%), column: 42
>                 character: “ (displayed as “) (codepoint 147, #o223, #x93)
>         preferred charset: unicode (Unicode (ISO10646))
>     code point in charset: 0x93
>                    syntax: w  which means: word
>                  category: l:Latin
>                  to input: type "C-x 8 RET 93" or "C-x 8 RET SET TRANSMIT 
> STATE"
>               buffer code: #xC2 #x93
>                 file code: #xC2 #x93 (encoded by coding system utf-8-unix)
>                   display: by this font (glyph code)
>         xft:-PfEd-Unifont-normal-normal-normal-*-12-*-*-*-d-0-iso10646-1 
> (#x96)
> 
>     Character code properties: customize what to show
>       old-name: SET TRANSMIT STATE
>       general-category: Cc (Other, Control)
>       decomposition: (147) ('“')
> 
>     There are text properties here:
>       fontified            t
> 
> Does this mean that the character with codepoint #o223 is missing from
> DejaVu Sans Mono (my default font), or that something else is wrong? (I
> tried setting my default font to several other faces but didn't see any
> change.)

No, it means that Emacs decoded a UTF-8 encoded text as Latin-1.  And
then the result which produced 2 characters out of one, was re-encoded
as UTF-8.

> I'm guessing it's some sort of composition problem, which takes me a
> long way beyond anything I know anything about!

No, composition is not involved.  It's just that the UTF-8 encoding of
Ó is a pair of bytes \303\223.