Editing fsetpos - FilterMeisterWiki

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= fsetpos =

== Syntax ==
{{int fsetpos(FILE * file, fpos_t * position)}}

== Arguments ==
:'''file'''
::A pointer to the file that you are working with (obtained with ((fopen))).
:'''position'''
::A 64-bit pointer to the new position in the file you want to move to (obtained with ((fgetpos))).

== Return ==
Returns zero if the operation completed successfully, non-zero otherwise.

== Description ==
Changes the current read/write position in the file to the new position, given by '''position'''.  Not really intended for moving to random positions in a file, unless you've already obtained pointers to those positions previously using ((fgetpos)).  For random file seeking, you should use ((fseek)) instead.

Note that '''position''' is actually a 64-bit pointer, which FilterMeister doesn't yet support.  If you need to use this, you should allocate your own memory for the pointer, or use the fact that the k0 & k1 variables are allocated next to each other in memory.
== Comments ==
Due to a bug in early versions of FilterMeister, fsetpos was sometimes used in place of fseek for seeking. It isn't recommended to do this, but if you need to use this workaround, here is more information on using fsetpos instead of fseek from the FMML FilterMeister Mailing List:
<code>
Where you have:

//fsetpos(SETTINGS_FILE, &mybyte);
//seek forward 37 bytes