wprintf with %lf

[Юрий Катков]

Hello everyone!

I'm trying to print double with wprintf in stdout and some format specifiers don't work.

int main( int argc, char* argv[] )

{

double val = 0.123;

wprintf( L"1 %lf\n", val ); // FAIL

wprintf( L"2 %lf\n", static_cast<float>( val ) ); //FAIL

wprintf( L"3 %f\n", val ); // OK

wprintf( L"4 %f\n", static_cast<float>( val ) ); // OK

printf( "5 %lf\n", val ); // OK

printf( "6 %lf\n", static_cast<float>( val ) ); // OK

printf( "7 %f\n", val ); // OK

printf( "8 %f\n", static_cast<float>( val ) ); // OK

return 0;

}

And what I see in console:

3 0.123000

4 0.123000

5 0.123000

6 0.123000

7 0.123000

8 0.123000

Why %ls doesn't work with wprintf ?

[Brion Vibber]

I think this is a bug in the musl implementation of the standard C library; 8-bit printf implements %lf but wide-char wprintf does not. (This can be seen in vfprintf.c and vfwprintf.c under emscripten/system/lib/libc/musl/src/stdio)

It looks like you can use %F for doubles on both functions, however.

-- brion

--
You received this message because you are subscribed to the Google Groups "emscripten-discuss" group.
To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-disc...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/emscripten-discuss/e4cce172-ac25-45f7-9bd1-879b96208c23%40googlegroups.com.

[Brion Vibber]

I've reported the bug to the musl mailing list with a fix patch for the wprintf implementation.

-- brion

[Юрий Катков]

Thanks a lot!

To unsubscribe from this group and stop receiving emails from it, send an email to emscripten-discuss+unsub...@googlegroups.com.