add CLAMP macro

git-svn-id: file:///home/lennart/svn/public/pulseaudio/branches/lennart@1876 fefdeb5f-60dc-0310-8127-8f9354f1896f

diff --git a/src/pulsecore/macro.h b/src/pulsecore/macro.h
index d0dff5e..c6bba43 100644 (file)
--- a/src/pulsecore/macro.h
+++ b/src/pulsecore/macro.h
@@ -28,7 +28,7 @@
 #include <unistd.h>
 #include <assert.h>
 #include <limits.h>
-#include <unistd.h>  
+#include <unistd.h>
 
 #include <pulsecore/log.h>
 
@@ -72,6 +72,10 @@ static inline size_t pa_page_align(size_t l) {
 #define MIN(a, b) ((a) < (b) ? (a) : (b))
 #endif
 
+#ifndef CLAMP
+#define CLAMP(x, low, high)  (((x) > (high)) ? (high) : (((x) < (low)) ? (low) : (x)))
+#endif
+
 /* This type is not intended to be used in exported APIs! Use classic "int" there! */
 #ifdef HAVE_STD_BOOL
 typedef _Bool pa_bool_t;