public virtual void CalcHashes(Hashes hashFlags, Validations validationFlags)
{
if (IssueModel.Data.HasFatal)
{
return;
}
bool hitCache = Data.fBuf != null && Data.FileSize < Int32.MaxValue;
if ((hashFlags & Hashes.FileMD5) != 0 && Data.fileMD5 == null)
{
var hasher = new Md5Hasher();
if (hitCache)
{
hasher.Append(Data.fBuf, 0, Data.fBuf.Length);
}
else
{
hasher.Append(Data.fbs);
}
Data.fileMD5 = hasher.GetHashAndReset();
}
if ((hashFlags & Hashes.FileSHA1) != 0 && Data.fileSHA1 == null)
{
var hasher = new Sha1Hasher();
if (hitCache)
{
hasher.Append(Data.fBuf, 0, Data.fBuf.Length);
}
else
{
hasher.Append(Data.fbs);
}
Data.fileSHA1 = hasher.GetHashAndReset();
}
if ((hashFlags & Hashes.FileSHA256) != 0 && Data.fileSHA256 == null)
{
var hasher = new Sha256Hasher();
if (hitCache)
{
hasher.Append(Data.fBuf, 0, Data.fBuf.Length);
}
else
{
hasher.Append(Data.fbs);
}
Data.fileSHA256 = hasher.GetHashAndReset();
}
if ((hashFlags & Hashes.MediaSHA1) != 0 && Data.mediaSHA1 == null)
{
if (Data.MediaCount == Data.FileSize && Data.fileSHA1 != null)
{
System.Diagnostics.Debug.Assert(Data.mediaPosition == 0);
Data.mediaSHA1 = Data.fileSHA1;
}
else
{
var hasher = new Sha1Hasher();
if (hitCache)
{
hasher.Append(Data.fBuf, (int)Data.mediaPosition, (int)Data.MediaCount);
}
else
{
hasher.Append(Data.fbs, Data.mediaPosition, Data.MediaCount);
}
Data.mediaSHA1 = hasher.GetHashAndReset();
}
}
if ((hashFlags & Hashes.MetaSHA1) != 0 && Data.metaSHA1 == null)
{
var hasher = new Sha1Hasher();
var suffixPos = Data.mediaPosition + Data.MediaCount;
if (hitCache)
{
hasher.Append(Data.fBuf, 0, (int)Data.mediaPosition, (int)suffixPos, (int)(Data.FileSize - suffixPos));
}
else
{
hasher.Append(Data.fbs, 0, Data.mediaPosition, suffixPos, Data.FileSize - suffixPos);
}
Data.metaSHA1 = hasher.GetHashAndReset();
}
}
