X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=lib%2Futil.h;h=9318fa7274a0f30b98dbf307a7abef348b35a7a9;hb=734ec5ec13499a2e7112626564cc9bd0c2d06600;hp=b2052f364e0f84f8b7405e396e79c463c20202f2;hpb=300c69464ca88ca97d4ce842b590ce6ce603201b;p=openvswitch

diff --git a/lib/util.h b/lib/util.h
index b2052f36..9318fa72 100644
--- a/lib/util.h
+++ b/lib/util.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012 Nicira Networks.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -78,6 +78,20 @@ extern const char *program_name;
 /* Returns true if X is a power of 2, otherwise false. */
 #define IS_POW2(X) ((X) && !((X) & ((X) - 1)))
 
+static inline bool
+is_pow2(uintmax_t x)
+{
+    return IS_POW2(x);
+}
+
+/* Returns the rightmost 1-bit in 'x' (e.g. 01011000 => 00001000), or 0 if 'x'
+ * is 0. */
+static inline uintmax_t
+rightmost_1bit(uintmax_t x)
+{
+    return x & -x;
+}
+
 #ifndef MIN
 #define MIN(X, Y) ((X) < (Y) ? (X) : (Y))
 #endif
@@ -208,6 +222,16 @@ int ctz(uint32_t);
 
 bool is_all_zeros(const uint8_t *, size_t);
 bool is_all_ones(const uint8_t *, size_t);
+void bitwise_copy(const void *src, unsigned int src_len, unsigned int src_ofs,
+                  void *dst, unsigned int dst_len, unsigned int dst_ofs,
+                  unsigned int n_bits);
+void bitwise_zero(void *dst_, unsigned int dst_len, unsigned dst_ofs,
+                  unsigned int n_bits);
+void bitwise_put(uint64_t value,
+                 void *dst, unsigned int dst_len, unsigned int dst_ofs,
+                 unsigned int n_bits);
+uint64_t bitwise_get(const void *src, unsigned int src_len,
+                     unsigned int src_ofs, unsigned int n_bits);
 
 #ifdef  __cplusplus
 }