// returns zero on success and -1 on failure
public override int Seek(long offset, FS_SEEK origin)
{
SeekOrigin _origin;
switch (origin)
{
case FS_SEEK.CUR: { _origin = SeekOrigin.Current; break; }
case FS_SEEK.END: { _origin = SeekOrigin.End; break; }
case FS_SEEK.SET: { _origin = SeekOrigin.Begin; break; }
default: { _origin = SeekOrigin.Current; common.FatalError($"File_Permanent::Seek: bad origin for {name}\n"); break; }
}
return((int)o.Seek(offset, _origin));
}
public override int Seek(long offset, FS_SEEK origin)
{
switch (origin)
{
case FS_SEEK.CUR: { curPtr += (int)offset; break; }
case FS_SEEK.END: { curPtr = fileSize - (int)offset; break; }
case FS_SEEK.SET: { curPtr = (int)offset; break; }
default: { common.FatalError($"File_Memory::Seek: bad origin for {name}\n"); return(-1); }
}
if (curPtr < 0)
{
curPtr = 0; return(-1);
}
if (curPtr > fileSize)
{
curPtr = fileSize; return(-1);
}
return(0);
}
public override int Seek(long offset, FS_SEEK origin) => - 1;
// Seek on a file. public virtual int Seek(long offset, FS_SEEK origin) => - 1;
