/*
- * Copyright (c) 2008, 2009 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2012, 2013, 2014 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
static inline unsigned long *
bitmap_unit__(const unsigned long *bitmap, size_t offset)
{
- return (unsigned long *) &bitmap[offset / BITMAP_ULONG_BITS];
+ return CONST_CAST(unsigned long *, &bitmap[offset / BITMAP_ULONG_BITS]);
}
static inline unsigned long
return 1UL << (offset % BITMAP_ULONG_BITS);
}
+#define BITMAP_N_LONGS(N_BITS) DIV_ROUND_UP(N_BITS, BITMAP_ULONG_BITS)
+
+static inline size_t
+bitmap_n_longs(size_t n_bits)
+{
+ return BITMAP_N_LONGS(n_bits);
+}
+
+static inline size_t
+bitmap_n_bytes(size_t n_bits)
+{
+ return bitmap_n_longs(n_bits) * sizeof(unsigned long int);
+}
+
static inline unsigned long *
bitmap_allocate(size_t n_bits)
{
- size_t n_longs = DIV_ROUND_UP(n_bits, BITMAP_ULONG_BITS);
- return xcalloc(sizeof(unsigned long int), n_longs);
+ return xzalloc(bitmap_n_bytes(n_bits));
+}
+
+unsigned long *bitmap_allocate1(size_t n_bits);
+
+static inline unsigned long *
+bitmap_clone(const unsigned long *bitmap, size_t n_bits)
+{
+ return xmemdup(bitmap, bitmap_n_bytes(n_bits));
}
static inline void
void bitmap_set_multiple(unsigned long *, size_t start, size_t count,
bool value);
bool bitmap_equal(const unsigned long *, const unsigned long *, size_t n);
-size_t bitmap_scan(const unsigned long int *, size_t start, size_t end);
+size_t bitmap_scan(const unsigned long int *, bool target,
+ size_t start, size_t end);
+size_t bitmap_count1(const unsigned long *, size_t n);
#define BITMAP_FOR_EACH_1(IDX, SIZE, BITMAP) \
- for ((IDX) = bitmap_scan(BITMAP, 0, SIZE); (IDX) < (SIZE); \
- (IDX) = bitmap_scan(BITMAP, (IDX) + 1, SIZE))
+ for ((IDX) = bitmap_scan(BITMAP, 1, 0, SIZE); (IDX) < (SIZE); \
+ (IDX) = bitmap_scan(BITMAP, 1, (IDX) + 1, SIZE))
#endif /* bitmap.h */