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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