1 files changed, 92 insertions, 0 deletions
diff --git a/src/rxvtutil.h b/src/rxvtutil.h
new file mode 100644
index 0000000..9d252d9
--- /dev/null
+++ b/src/rxvtutil.h
@@ -0,0 +1,92 @@
+#ifndef RXVT_UTIL_H
+#define RXVT_UTIL_H
+
+#include <stdlib.h>
+#include <string.h>
+#include "ecb.h"
+#include "estl.h"
+
+#include "emman.h"
+
+// 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
+
+// various utility functions
+template<typename T, typename U> static inline void min_it (T &a, U b) { a = a < (T)b ? a : (T)b; }
+template<typename T, typename U> static inline void max_it (T &a, U b) { a = a > (T)b ? a : (T)b; }
+
+template<typename T, typename U, typename V> static inline T    clamp    (T  v, U a, V b) { return v < (T)a ? a : v >(T)b ? b : v; }
+template<typename T, typename U, typename V> static inline void clamp_it (T &v, U a, V b) {    v = v < (T)a ? a : v >(T)b ? b : v; }
+
+// 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;
+}
+
+// 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));
+}
+
+// in range including end
+#define IN_RANGE_INC(val,beg,end) \
+  ((unsigned int)(val) - (unsigned int)(beg) <= (unsigned int)(end) - (unsigned int)(beg))
+
+// in range excluding end
+#define IN_RANGE_EXC(val,beg,end) \
+  ((unsigned int)(val) - (unsigned int)(beg) <  (unsigned int)(end) - (unsigned int)(beg))
+
+// for m >= -n, ensure remainder lies between 0..n-1
+#define MOD(m,n) (((m) + (n)) % (n))
+
+// makes dynamically allocated objects zero-initialised
+struct zero_initialized
+{
+  void *operator new (size_t s);
+  void operator delete (void *p, size_t s);
+};
+
+struct stringvec : simplevec<char *>
+{
+  ~stringvec ()
+  {
+    for (char **c = begin (); c != end (); c++)
+      free (*c);
+  }
+};
+
+#if 0
+template<typename T>
+struct rxvt_vec : simplevec<void *>
+{
+  typedef T *iterator;
+
+  void push_back (T d) { simplevec<void *>::push_back ((void *)d); }
+  T pop_back () { return (T*)simplevec<void *>::pop_back (); }
+  void erase (int i) { erase (begin () + i); }
+  void erase (iterator i) { simplevec<void *>::erase ((void **)i); }
+  iterator begin () const { return (iterator)simplevec<void *>::begin (); }
+  iterator end () const { return (iterator)simplevec<void *>::end (); }
+  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
+
+typedef estl::scoped_array<char> auto_str;
+
+#endif
+