--- rxvt-unicode/src/rxvtutil.h	2006/01/30 16:12:58	1.24
+++ rxvt-unicode/src/rxvtutil.h	2007/12/04 16:33:42	1.35
@@ -4,26 +4,24 @@
 #include <cstdlib>
 #include <cstring>
 
+using namespace std;
+
 #define PP_CONCAT_(a, b) a ## b
 #define PP_CONCAT(a, b) PP_CONCAT_(a, b)
 #define PP_STRINGIFY_(a) #a
 #define PP_STRINGIFY(a) PP_STRINGIFY_(a)
 
-// actually, some gcc-3.x versions work, too
-#define HAVE_GCC_BUILTINS (__GNUC__ >= 4)
+#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
 
-#ifndef __attribute__
-# if __GNUC__
-#  if (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || (__GNUC__ < 2)
-#   define __attribute__(x)
-#  endif
-# endif
-# define __attribute__(x)
+#if __GNUC__ >= 4
+# define rxvt_attribute(x) __attribute__(x)
+#else
+# define rxvt_attribute(x)
 #endif
 
-#define NORETURN __attribute__ ((noreturn))
-#define UNUSED   __attribute__ ((unused))
-#define CONST    __attribute__ ((const))
+#define NORETURN rxvt_attribute ((noreturn))
+#define UNUSED   rxvt_attribute ((unused))
+#define CONST    rxvt_attribute ((const))
 
 // increases code size unless -fno-enforce-eh-specs
 #if __GNUC__
@@ -56,18 +54,39 @@
 
 template<typename T, typename U> static inline void swap (T& a, U& b) { T t=a; a=(T)b; b=(U)t; }
 
+template<typename T> static inline T squared_diff (T a, T b) { return (a-b)*(a-b); }
+
 // linear interpolation
 template<typename T, typename U, typename P>
 static inline
 T lerp (T a, U b, P p)
 {
-  return (int(a) * int(p) + int(b) * int(100 - p)) / 100;
+  return (long(a) * long(100 - p) + long(b) * long(p) + 50) / 100;
+}
+
+template <typename I, typename T>
+I find (I first, I last, const T& value)
+{
+  while (first != last && *first != value)
+    ++first;
+
+  return first;
+}
+
+// return a very temporary (and never deallocated) buffer. keep small.
+void *rxvt_temp_buf (int len);
+
+template<typename T>
+static inline T *
+rxvt_temp_buf (int len)
+{
+  return (T *)rxvt_temp_buf (len * sizeof (T));
 }
 
 // some bit functions, xft fuck me plenty
 #if HAVE_GCC_BUILTINS
-static inline int ctz      (unsigned int x) CONST { return __builtin_ctz      (x); }
-static inline int popcount (unsigned int x) CONST { return __builtin_popcount (x); }
+static inline int ctz      (unsigned int x) { return __builtin_ctz      (x); }
+static inline int popcount (unsigned int x) { return __builtin_popcount (x); }
 #else
 // count trailing zero bits and count # of one bits
 int ctz      (unsigned int x) CONST;
@@ -89,7 +108,7 @@
 };
 
 /* simplevec taken (and heavily modified), from:
- * 
+ *
  *  MICO --- a free CORBA implementation
  *  Copyright (C) 1997-98 Kay Roemer & Arno Puder
  */
@@ -345,7 +364,17 @@
 
 template<typename T>
 struct vector : simplevec<T>
-{ };
+{
+};
+
+struct stringvec : simplevec<char *>
+{
+  ~stringvec ()
+  {
+    for (char **c = begin (); c != end (); c++)
+      free (*c);
+  }
+};
 
 #if 0
 template<typename T>
@@ -363,15 +392,6 @@
 };
 #endif
 
-template <typename I, typename T>
-I find (I first, I last, const T& value)
-{
-  while (first != last && *first != value)
-    ++first;
-
-  return first;
-}
-
 template<typename T>
 struct auto_ptr {
   T *p;
@@ -432,24 +452,5 @@
 
 typedef auto_ptr<char> auto_str;
 
-struct stringvec : simplevec<char *>
-{
-  ~stringvec ()
-  {
-    for (char **c = begin (); c != end (); c++)
-      free (*c);
-  }
-};
-
-// return a very temporary (and never deallocated) buffer. keep small.
-void *rxvt_temp_buf (int len);
-
-template<typename T>
-static inline T *
-rxvt_temp_buf (int len)
-{
-  return (T *)rxvt_temp_buf (len * sizeof (T));
-}
-
 #endif