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authorMattias Andrée <maandree@operamail.com>2013-04-16 00:06:18 +0200
committerMattias Andrée <maandree@operamail.com>2013-04-16 00:06:18 +0200
commit90258fdadace50db3ef72a46aa84e9004c7cb61a (patch)
tree4813be3ed649b7bcdb4588aa6cc28613da80576d /c
parentwhoops, read the filesize instead of the blocksize (diff)
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fix binary logarithm
Signed-off-by: Mattias Andrée <maandree@operamail.com>
Diffstat (limited to 'c')
-rw-r--r--c/sha3.c14
1 files changed, 11 insertions, 3 deletions
diff --git a/c/sha3.c b/c/sha3.c
index d8981ed..72f3e83 100644
--- a/c/sha3.c
+++ b/c/sha3.c
@@ -241,10 +241,18 @@ inline void revarraycopy(byte* src, long soff, byte* dest, long doff, long lengt
/**
* Binary logarithm
*
- * @param X:long The value of which to calculate the binary logarithm
- * @return :long The binary logarithm
+ * @param x The value of which to calculate the binary logarithm
+ * @return The binary logarithm
*/
-#define lb(X) ((((X & 0xFF00) == 0 ? 0 : 8) + ((X & 0xF0F0) == 0 ? 0 : 4)) + (((X & 0xCCCC) == 0 ? 0 : 2) + ((X & 0xAAAA) == 0 ? 0 : 1)))
+static long lb(long x)
+{
+ long rc = 0;
+ if ((x & 0xFF00) != 0) { rc += 8; x >>= 8; }
+ if ((x & 0x00F0) != 0) { rc += 4; x >>= 4; }
+ if ((x & 0x000C) != 0) { rc += 2; x >>= 2; }
+ if ((x & 0x0002) != 0) rc += 1;
+ return rc;
+}
/**