Function CreateFileContentHash

src/OpenColorIO/Platform.cpp:333–357

That's the default hash method implementation to compute a hash key based on a file content.

// That's the default hash method implementation to compute a hash key based on a file content.
std::string CreateFileContentHash(const std::string &filename)
{
#if defined(_WIN32) && defined(UNICODE)
    struct _stat fileInfo;
    if (_wstat(Platform::Utf8ToUtf16(filename).c_str(), &fileInfo) == 0)
#else
    struct stat fileInfo;
    if (stat(filename.c_str(), &fileInfo) == 0)
#endif
    {
        // Treat the st_dev (i.e. device) + st_ino (i.e. inode) as a proxy for the contents.

        std::ostringstream fasthash;
        fasthash << fileInfo.st_dev << ":";
#ifdef _WIN32
        // TODO: The hard-linked files are then not correctly supported on Windows platforms.
        fasthash << std::hash<std::string>{}(filename);
#else
        fasthash << fileInfo.st_ino;
#endif
        return fasthash.str();
    }

    return "";
}

} // Platform