-extern int region_cache_forward (struct buffer *BUF,
- struct region_cache *CACHE,
- ptrdiff_t POS,
- ptrdiff_t *NEXT);
-
-/* Return true if the text immediately before POS in BUF is known, for
- the purposes of CACHE. If NEXT is non-zero, set *NEXT to the nearest
- position before POS where the knowledge changes. */
-extern int region_cache_backward (struct buffer *BUF,
- struct region_cache *CACHE,
- ptrdiff_t POS,
- ptrdiff_t *NEXT);
+extern int region_cache_forward (struct buffer *buf, struct region_cache *c,
+ ptrdiff_t pos, ptrdiff_t *next);
+
+/* Likewise, except before POS rather than after POS. */
+extern int region_cache_backward (struct buffer *buf, struct region_cache *c,
+ ptrdiff_t pos, ptrdiff_t *next);
+
+#endif /* EMACS_REGION_CACHE_H */