diff options
Diffstat (limited to 'src/libutil/aterm-map.cc')
| -rw-r--r-- | src/libutil/aterm-map.cc | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/src/libutil/aterm-map.cc b/src/libutil/aterm-map.cc index f400464378f5..33388e148a65 100644 --- a/src/libutil/aterm-map.cc +++ b/src/libutil/aterm-map.cc @@ -111,34 +111,35 @@ void ATermMap::copy(KeyValue * elements, unsigned int capacity) } +/* !!! use a bigger shift for 64-bit platforms? */ static const unsigned int shift = 16; -static const unsigned int knuth = (unsigned int) (0.6180339887 * (1 << shift)); +static const unsigned long knuth = (unsigned long) (0.6180339887 * (1 << shift)); -unsigned int ATermMap::hash1(ATerm key) const +unsigned long ATermMap::hash1(ATerm key) const { /* Don't care about the least significant bits of the ATerm pointer since they're always 0. */ - unsigned int key2 = ((unsigned int) key) >> 2; + unsigned long key2 = ((unsigned long) key) >> 2; /* Approximately equal to: double d = key2 * 0.6180339887; unsigned int h = (int) (capacity * (d - floor(d))); */ - unsigned int h = (capacity * ((key2 * knuth) & ((1 << shift) - 1))) >> shift; + unsigned long h = (capacity * ((key2 * knuth) & ((1 << shift) - 1))) >> shift; return h; } -unsigned int ATermMap::hash2(ATerm key) const +unsigned long ATermMap::hash2(ATerm key) const { - unsigned int key2 = ((unsigned int) key) >> 2; + unsigned long key2 = ((unsigned long) key) >> 2; /* Note: the result must be relatively prime to `capacity' (which is a power of 2), so we make sure that the result is always odd. */ - unsigned int h = ((key2 * 134217689) & (capacity - 1)) | 1; + unsigned long h = ((key2 * 134217689) & (capacity - 1)) | 1; return h; } |