Mercurial > hg > dav / file diff

--- a/ucx/ucx.h	Fri Sep 22 20:19:00 2017 +0200
+++ b/ucx/ucx.h	Fri Sep 22 20:42:33 2017 +0200
@@ -40,9 +40,10 @@
 #define UCX_VERSION_MAJOR   0
 
 /** Minor UCX version as integer constant. */
-#define UCX_VERSION_MINOR   11
+#define UCX_VERSION_MINOR   12
 
 #include <stdlib.h>
+#include <stdint.h>
 
 #ifdef _WIN32
 #if !(defined __ssize_t_defined || defined _SSIZE_T_)
@@ -86,7 +87,16 @@
  * and 0 if both arguments are equal. If the third argument is
  * <code>NULL</code>, it shall be ignored.
  */
-typedef int(*cmp_func)(void*,void*,void*);
+typedef int(*cmp_func)(const void*,const void*,void*);
+
+/**
+ * Function pointer to a distance function.
+ * 
+ * The distance function shall take three arguments: the two values for which
+ * the distance shall be computed and optional additional data.
+ * The function shall then return the signed distance as integer value.
+ */
+typedef intmax_t(*distance_func)(const void*,const void*,void*);
 
 /**
  * Function pointer to a copy function.
@@ -99,7 +109,7 @@
  * passed to <code>free()</code> depends on the implementation of the
  * respective <code>copy_func</code>.
  */
-typedef void*(*copy_func)(void*,void*);
+typedef void*(*copy_func)(const void*,void*);
 
 /**
  * Function pointer to a write function.