in reply to Unicode/Wide strings and XS

Did you read "Using Unicode in XS" in perlunicode?

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Re: Re: Unicode/Wide strings and XS
by meetraz (Hermit) on Jan 09, 2004 at 15:46 UTC
    Yes, see above where I mentioned SvPVutf8() and sv_utf8_upgrade(). These don't seem to work. Perhaps "Perl Unicode" and "UTF8" are not the same thing as a "Wide String" as refered to by the Win32 API?

    Update:

    Here's an example of what I'm doing:

    // Nodename is SV* holding "examplenode"
printf("Nodename=[%s]\n", SvPV_nolen(Nodename)); // output: "Nodename=
+[examplenode]"

sv_utf8_upgrade(Nodename);

wprintf(L"Got [%s]\n", (wchar_t*)SvPVutf8_nolen(Nodename)); // output:
+ "Nodename=[]"

    [download]
    Am I doing something wrong? The string seems to get clobbered, or it's in a format that Windows won't accept as a "wide string".
[reply]
[d/l]
      Perhaps "Perl Unicode" and "UTF8" are not the same thing as a "Wide String" as refered to by the Win32 API?

      Unicode includes more than one encoding ("transformation format"). Perl uses UTF-8. Windows calls UTF-16 "UNICODE" or "wide" (or close to UTF-16 -- I don't think Windows supports multi-word characters which are part of UTF-16; [that is, Windows "UNICODE" appears to use only fixed-width 16-bit characters]). Windows calls UTF-8 "multi-byte".

      Update: And Perl doesn't support UTF-16 directly (there may be modules that deal with it), which could also be expressed as "Perl doesn't support multi-word nor single-word characters" using some of my loose terminology from above.

                      - tye

      [Updated]

[reply]

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