Function MVOL_read_block

src/burp/mvol.cpp:976–999

____________________________________________________________ Read a chunk of data from the IO buffer. Return a pointer to the first position NOT read into.

// Return a pointer to the first position NOT read into.
//
UCHAR* MVOL_read_block(BurpGlobals* tdgbl, UCHAR* ptr, ULONG count)
{
	while (count)
	{
		// If buffer empty, reload it
		if (tdgbl->gbl_io_cnt <= 0)
			MVOL_read(tdgbl);

		const ULONG n = MIN(count, (ULONG) tdgbl->gbl_io_cnt);

		// Copy data from the IO buffer

		memcpy(ptr, tdgbl->gbl_io_ptr, n);
		ptr += n;

		// Skip ahead in current buffer

		count -= n;
		tdgbl->gbl_io_cnt -= n;
		tdgbl->gbl_io_ptr += n;
	}

	return ptr;
}


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