NAME
        FRead -- Reads a number of blocks from an input (buffered) (V36)

   SYNOPSIS
        count = FRead(fh, buf, blocklen, blocks)
        D0            D1  D2     D3        D4

        long fread(bptr, strptr, ulong, ulong)

   FUNCTION
        Attempts to read a number of blocks, each blocklen long, into the
        specified buffer from the input stream.  May return less than
        the number of blocks requested, either due to EOF or read errors.
        This call is buffered.

   INPUTS
        fh       - filehandle to use for buffered I/O
        buf      - Area to read bytes into.
        blocklen - number of bytes per block.  Must be > 0.
        blocks   - number of blocks to read.  Must be > 0.

   RESULT
        count - Number of _blocks_ read, or 0 for EOF.  On an error, the
                number of blocks actually read is returned.

   BUGS
        Doesn't clear ioerr() before starting.  if you want to find out
        about errors, use SetIoErr(0L) before calling.

   SEE ALSO
        fgetc(), fwrite(), fgets()