Re: [Mingw-users] The mysterious case of LoadLibrary("fmifs.dll") and tolower()

[Pete B. <pb...@gm...>]

On 2012.05.16 00:29, Xiaofan Chen wrote:
> Under my English Windows XP SP3 with Chinese Locale (Language for
> Non-Unicode Program set to Chinese).
>
> 1) Build with MinGW gcc 4.6.2
> mcuee@dellxp /c/work/mingw/test
> $ ./test1_mingw32.exe
> tolower(0xe9) = 0xe9
> tolower(0xe9) = 0xe9
>
> 2) Build with TDM64 (MinGW-w64 4.6.1), adding "-m32" to build
> 32bit binary
> mcuee@dellxp /c/work/mingw/test
> $ ./test1_tdm64_win32.exe
> tolower(0xe9) = 0xe9
> tolower(0xe9) = 0xe9

Interesting.

I just tested a 4th machine with XP installed and an "English (Ireland)" 
locale, and still observed the same results as with 7 (second output = 
0xa3). And in the virtual XP mode of Windows 7, when running the same 
program, I got 0x3f. Thus I would think the problem will also manifest 
itself with XP, as long as a western locale is in use.

What I suspect, that would explain your results, is that the second 
tolower() call is dependent on the system locale/codepage for lowercase 
conversion, and AFAIK (correct me if I'm wrong) there's no lowercase 
conversion for Chinese characters. So that might explain why an 0xe9, in 
a Chinese codepage would still be left unchanged.

Regards,

/Pete