X-Git-Url: https://code.delx.au/gnu-emacs/blobdiff_plain/61655fd96ce959e47ad8d047387e5585843fc789..50c117fe86d94719807cbe08353c032779b3b910:/src/region-cache.h

diff --git a/src/region-cache.h b/src/region-cache.h
index e4c6b59ee9..1f336cebaf 100644
--- a/src/region-cache.h
+++ b/src/region-cache.h
@@ -1,6 +1,6 @@
 /* Header file: Caching facts about regions of the buffer, for optimization.
 
-Copyright (C) 1985-1986, 1993, 1995, 2001-2013 Free Software Foundation,
+Copyright (C) 1985-1986, 1993, 1995, 2001-2015 Free Software Foundation,
 Inc.
 
 This file is part of GNU Emacs.
@@ -89,24 +89,19 @@ extern void invalidate_region_cache (struct buffer *BUF,
 /* The scanning functions.
 
    Basically, if you're scanning forward/backward from position POS,
-   and region_cache_forward/backward returns true, you can skip all
-   the text between POS and *NEXT.  And if the function returns false,
+   and region_cache_forward/backward returns nonzero, you can skip all
+   the text between POS and *NEXT.  And if the function returns zero,
    you should examine all the text from POS to *NEXT, and call
    know_region_cache depending on what you find there; this way, you
    might be able to avoid scanning it again.  */
 
-/* Return true if the text immediately after POS in BUF is known, for
-   the purposes of CACHE.  If NEXT is non-zero, set *NEXT to the nearest
+/* Return the value for the text immediately after POS in BUF if the value
+   is known, for the purposes of CACHE, and return zero otherwise.
+   If NEXT is non-zero, set *NEXT to the nearest
    position after POS where the knowledge changes.  */
-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);