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Re: printf functions fail with non-ascii characters
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Re: printf functions fail with non-ascii characters


  • Subject: Re: printf functions fail with non-ascii characters
  • From: "Shawn Erickson" <email@hidden>
  • Date: Wed, 5 Sep 2007 10:49:39 -0700

On 9/5/07, William H. Schultz <email@hidden> wrote:
>  I might be asking a silly question here, but I've been working with this
> for a few days, and I've narrowed my issues down to this:
>
> The wide character versions of the printf functions are failing with various
> non-ascii characters, as can be seen with the following code:
>
>
>
> #include <stdarg.h>
> #include <wchar.h>
>
> int main()
> {
>  wchar_t buf[20];
>  va_list ap;
>  return vswprintf(buf, 20, L"トネヘ", ap);
> }
>
> In case the above doesn't properly survive the e-mail, that's just three
> random Japanese characters in the test string.  This code returns -1 instead
> of the 3 that I would expect by looking at it.  The same is true for various
> other sets of non-ascii characters and various other wide character printf
> functions.
>
> I'm using Xcode 2.4.1 under 10.4.10 on an Intel machine.  This is with g++
> version 4.0.1 (build 5367).
>
> Any ideas?

What encoding are using using for the file that contains main? Using
mulit-byte characters directly in source code is fragile and not
always supported.

-Shawn
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