--- rxvt-unicode/src/rxvtutil.h	2006/01/25 00:42:21	1.20
+++ rxvt-unicode/src/rxvtutil.h	2007/12/02 22:36:42	1.33
@@ -4,11 +4,34 @@
 #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)
 
+#define HAVE_GCC_BUILTINS (__GNUC__ >= 4 || (__GNUC__ == 3 && __GNUC_MINOR__ == 4))
+
+#if __GNUC__ >= 4
+# define rxvt_attribute(x) __attribute__(x)
+#else
+# define rxvt_attribute(x)
+#endif
+
+#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__
+# define NOTHROW
+# define THROW(x)
+#else
+# define NOTHROW  throw()
+# define THROW(x) throw x
+#endif
+
 extern class byteorder {
   static unsigned int e; // at least 32 bits
 public:
@@ -31,6 +54,45 @@
 
 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 (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) { 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;
+int popcount (unsigned int x) CONST;
+#endif
+
 // in range including end
 #define IN_RANGE_INC(val,beg,end) \
   ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
@@ -46,7 +108,7 @@
 };
 
 /* simplevec taken (and heavily modified), from:
- * 
+ *
  *  MICO --- a free CORBA implementation
  *  Copyright (C) 1997-98 Kay Roemer & Arno Puder
  */
@@ -304,7 +366,15 @@
 struct vector : simplevec<T>
 { };
 
-#if 0
+struct stringvec : simplevec<char *>
+{
+  ~stringvec ()
+  {
+    for (char **c = begin (); c != end (); c++)
+      free (*c);
+  }
+};
+
 template<typename T>
 struct rxvt_vec : simplevec<void *> {
   typedef T *iterator;
@@ -318,16 +388,6 @@
   T &operator [] (int i) { return * (T *) (& ((* (simplevec<void *> *)this)[i])); }
   const T &operator [] (int i) const { return * (const T *) (& ((* (const simplevec<void *> *)this)[i])); }
 };
-#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 {
@@ -389,24 +449,5 @@
 
 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>
-inline T *
-rxvt_temp_buf (int len)
-{
-  return (T *)rxvt_temp_buf (len * sizeof (T));
-}
-
 #endif