[PATCH v3] msvcirt: Implement most of ifstream.

[Piotr Caban]

On 9/2/20 6:13 PM, Arkadiusz Hiler wrote:
> +/* ?attach at ifstream@@QAEXH at Z */
> +/* ?attach at ifstream@@QEAAXH at Z */
> +DEFINE_THISCALL_WRAPPER(ifstream_attach, 8)
> +void __thiscall ifstream_attach(istream *this, filedesc fd)
> +{
> +    TRACE("(%p %d)\n", this, fd);
> +    if (filebuf_attach(ifstream_rdbuf(this), fd) == NULL)
> +        ios_clear(istream_get_ios(this), IOSTATE_failbit);
The function should add failbit flag to current state (it shouldn't e.g. 
clear eof state). The same applies to all cases where failbit is set.

Thanks,
Piotr