libtu/iterable.h

   1 /*
   2  * libtu/iterable.h
   3  *
   4  * Copyright (c) Tuomo Valkonen 2005.
   5  *
   6  * You may distribute and modify this library under the terms of either
   7  * the Clarified Artistic License or the GNU LGPL, version 2.1 or later.
   8  */
   9
  10 #ifndef LIBTU_ITERABLE_H
  11 #define LIBTU_ITERABLE_H
  12
  13 #include "types.h"
  14 #include "obj.h"
  15
  16 typedef void *VoidIterator(void *);
  17 typedef Obj *ObjIterator(void *);
  18
  19 typedef bool BoolFilter(void *p, void *param);
  20
  21 #define FOR_ALL_ITER(INIT, ITER, VAR, LL, TMP) \
  22     for(INIT(TMP, LL), (VAR)=ITER(TMP); (VAR)!=NULL; VAR=ITER(TMP))
  23
  24 extern void *iterable_nth(uint n, VoidIterator *iter, void *st);
  25 extern bool iterable_is_on(void *p, VoidIterator *iter, void *st);
  26 extern void *iterable_find(BoolFilter *f, void *fparam,
  27                            VoidIterator *iter, void *st);
  28
  29 #endif /* LIBTU_ITERABLE_H */