core/src/filter.c

   1 #include "filter.h"
   2
   3 #include <assert.h> /* assert */
   4
   5 /* Since the behavior for every 'simply filtered' item is the same, use a macro */
   6 #define CASE_FILTER_ACTION(condition,function) \
   7         case condition: \
   8                 if(f->function) { \
   9                         f->function(filter, mode, item, next, nextData); \
  10                 } else { \
  11                         next(nextData, mode, item); \
  12                 } \
  13                 break;
  14
  15 void SimpleFilter_action(void *filter, FilterMode mode, DataItem *item, FilterAction_next next, void *nextData) {
  16         assert(filter && next);
  17         SimpleFilter *f = (SimpleFilter*)filter;
  18
  19         switch(mode) {
  20         CASE_FILTER_ACTION(FILTER_WRITE, onWrite)
  21         CASE_FILTER_ACTION(FILTER_WRITE_COMPLETE, onWriteComplete)
  22         CASE_FILTER_ACTION(FILTER_READ, onRead)
  23         CASE_FILTER_ACTION(FILTER_READ_COMPLETE, onReadComplete)
  24         default:
  25                 /* By default just pass it on no matter what it is*/
  26                 next(nextData, mode, item);
  27                 break;
  28         }
  29 }