added rbitset_malloc()

[r16781]

diff --git a/include/libfirm/adt/raw_bitset.h b/include/libfirm/adt/raw_bitset.h
index 05ac9e4..8ffee7a 100644 (file)
--- a/include/libfirm/adt/raw_bitset.h
+++ b/include/libfirm/adt/raw_bitset.h
@@ -49,6 +49,21 @@
 #define BITSET_SIZE_BYTES(size_bits)    (BITSET_SIZE_ELEMS(size_bits)*4)
 #define BITSET_ELEM(bitset,pos)         bitset[pos / 32]
 
 #define BITSET_SIZE_BYTES(size_bits)    (BITSET_SIZE_ELEMS(size_bits)*4)
 #define BITSET_ELEM(bitset,pos)         bitset[pos / 32]
 

+/**
+ * Allocate an empty raw bitset on the heap.
+ *
+ * @param size  element size of the bitset
+ *
+ * @return the new bitset
+ */
+static INLINE unsigned *rbitset_malloc(unsigned size) {
+       unsigned size_bytes = BITSET_SIZE_BYTES(size);
+       unsigned *res = malloc(size_bytes);
+       memset(res, 0, size_bytes);
+
+       return res;
+}
+

 /**
  * Allocate an empty raw bitset on the stack.
  *
 /**
  * Allocate an empty raw bitset on the stack.
  *