On Fri, 2002-01-25 at 09:29, Andreas Schwab wrote:
> |> /* This is a hack to allow mangling of file pos independent
> |> * of actual bytes read. Simply place the data at page,
> |> * return the bytes, and set `start' to the desired offset
> |> * as an unsigned int. - Paul.Russell@rustcorp.com.au
> |> */
> It is documented, RTFC.
Comment or Code? The comment is somewhat ambiguous and incorrect.
Reading the code, I take it that "start" is either a pointer into
the buffer where the string of n data bytes starts, or else
(when it is assigned a value less than the beginning of the buffer)
it is a special value by which the file offset is to be adjusted,
instead of n. Thus the comment might be clarified:
/*
* This is a hack to allow adjusting the file offset
* by a number different from the number of bytes read.
* Simply place the data at page, return the number of
* bytes read, and set "start" to the (signed long) amount
* by which the file offset is to be increased or
* decreased
*/
My question then is: why would one want to adjust the file
offset other than by +n?
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This archive was generated by hypermail 2b29 : Thu Jan 31 2002 - 21:00:32 EST