Can you try fast_io instead of iostream? fast_io always does codecvt itself
instead of relying on crt. It also directly supports cryptopp's hash
function
On Thu, Jun 15, 2023, 05:14 Jeffrey Walton <noloa...@gmail.com> wrote:
> On Thu, Jun 15, 2023 at 12:16 AM fa <fery....@gmail.com> wrote:
> >
> > I tried two methods:
> >
> >
> > 1.
> >
> >
> > void CryptoHashes::makeFileHash(const QString &filePath)
> >
> > {
> >
> > FileSource f(filePath.toStdString().c_str(), true, new HashFilter(hash,
> new HexEncoder(new StringSink(digest))));
> >
> > }
> >
> >
> >
> > 2.
> >
> >
> > void CryptoHashes::makeFileHash(const QString &filePath)
> >
> > {
> >
> > std::filesystem::path _path {
> std::filesystem::u8path(filePath.toStdString()) };
> >
> > std::ifstream m_file(_path, std::ios::in);
> >
> >
> > FileSource f(m_file, true, new HashFilter(hash, new HexEncoder(new
> StringSink(digest))));
> >
> > }
> >
> >
> >
> > the only exception is that when I tried method 2, it always calculated
> hash of NULL, no matter which file I selected.
>
> std::ifstream does not have a ctor that takes a std::filesystem::path.
> See https://cplusplus.com/reference/fstream/ifstream/ifstream/ . It
> looks like you need to do something like
> https://stackoverflow.com/a/45401869 .
>
> Jeff
>
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