Move hash gen func to own file.

SVN revision: 27605

1 files changed, 35 insertions, 0 deletions

diff --git a/legacy/eet/src/lib/eet_utils.c b/legacy/eet/src/lib/eet_utils.c
new file mode 100644
index 0000000000..898d87fa1f
--- /dev/null
+++ b/legacy/eet/src/lib/eet_utils.c
@@ -0,0 +1,35 @@
+int
+_eet_hash_gen(const char *key, int hash_size)
+{
+   int                  hash_num = 0;
+   int                  value, i;
+   unsigned char        *ptr;
+ 
+   const int masks[9] =
+     {
+        0x00,
+        0x01,
+        0x03,
+        0x07,
+        0x0f,
+        0x1f,
+        0x3f,
+        0x7f,
+        0xff
+     };
+ 
+   /* no string - index 0 */
+   if (!key) return 0;
+ 
+   /* calc hash num */
+   for (i = 0, ptr = (unsigned char *)key, value = (int)(*ptr);
+        value;
+        ptr++, i++, value = (int)(*ptr))
+     hash_num ^= (value | (value << 8)) >> (i & 0x7);
+
+   /* mask it */
+   hash_num &= masks[hash_size];
+   /* return it */
+   return hash_num;
+}
+