1 files changed, 100 insertions, 0 deletions
diff --git a/src/uint128p.c b/src/uint128p.c
new file mode 100644
index 0000000..e109f94
--- /dev/null
+++ b/src/uint128p.c
@@ -0,0 +1,100 @@
+#include "uint_t.h"
+
+/**
+  * @file uint128p.c
+  * @authors feh, jmh
+  * @ref djbdns6
+  * @brief packing/unpacking 128 bit integer to/from char string
+  */
+ 
+void uint128_pack(char s[16],uint128 u)
+{
+   s[0] = u.lo & 255; u.lo >>= 8;
+   s[1] = u.lo & 255; u.lo >>= 8;
+   s[2] = u.lo & 255; u.lo >>= 8;
+   s[3] = u.lo & 255; u.lo >>= 8;
+   s[4] = u.lo & 255; u.lo >>= 8;
+   s[5] = u.lo & 255; u.lo >>= 8;
+   s[6] = u.lo & 255; u.lo >>= 8;
+   s[7] = u.lo & 255; u.lo >>= 8;
+
+   s[8] = u.hi & 255; u.hi >>= 8;
+   s[9] = u.hi & 255; u.hi >>= 8;
+  s[10] = u.hi & 255; u.hi >>= 8;
+  s[11] = u.hi & 255; u.hi >>= 8;
+  s[12] = u.hi & 255; u.hi >>= 8;
+  s[13] = u.hi & 255; u.hi >>= 8;
+  s[14] = u.hi & 255; u.hi >>= 8;
+  s[15] = u.hi & 255; 
+}
+void uint128_pack_big(char s[16],uint128 u)
+{
+  s[15] = u.lo & 255; u.lo >>= 8;
+  s[14] = u.lo & 255; u.lo >>= 8;
+  s[13] = u.lo & 255; u.lo >>= 8;
+  s[12] = u.lo & 255; u.lo >>= 8;
+  s[11] = u.lo & 255; u.lo >>= 8;
+  s[10] = u.lo & 255; u.lo >>= 8;
+   s[9] = u.lo & 255; u.lo >>= 8;
+   s[8] = u.lo & 255; u.lo >>= 8;
+
+   s[7] = u.hi & 255; u.hi >>= 8;
+   s[6] = u.hi & 255; u.hi >>= 8;
+   s[5] = u.hi & 255; u.hi >>= 8;
+   s[4] = u.hi & 255; u.hi >>= 8;
+   s[3] = u.hi & 255; u.hi >>= 8;
+   s[2] = u.hi & 255; u.hi >>= 8;
+   s[1] = u.hi & 255; u.hi >>= 8;
+   s[0] = u.hi & 255; 
+}
+
+void uint128_unpack(char s[16],uint128 *u)
+{
+  uint128 result;
+  result.hi = result.lo = 0ULL;
+
+  result.hi =  (unsigned char) s[15]; result.hi <<= 8;
+  result.hi += (unsigned char) s[14]; result.hi <<= 8;
+  result.hi += (unsigned char) s[13]; result.hi <<= 8;
+  result.hi += (unsigned char) s[12]; result.hi <<= 8;
+  result.hi += (unsigned char) s[11]; result.hi <<= 8;
+  result.hi += (unsigned char) s[10]; result.hi <<= 8;
+  result.hi += (unsigned char)  s[9]; result.hi <<= 8;
+  result.hi += (unsigned char)  s[8];   //correct
+
+  result.lo += (unsigned char)  s[7]; result.lo <<= 8;  
+  result.lo += (unsigned char)  s[6]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[5]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[4]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[3]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[2]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[1]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[0];  
+
+  *u = result;
+}
+void uint128_unpack_big(char s[16],uint128 *u)
+{
+  uint128 result;
+  result.hi = result.lo = 0ULL;
+
+  result.hi =  (unsigned char) s[0]; result.hi <<= 8;
+  result.hi += (unsigned char) s[1]; result.hi <<= 8;
+  result.hi += (unsigned char) s[2]; result.hi <<= 8;
+  result.hi += (unsigned char) s[3]; result.hi <<= 8;
+  result.hi += (unsigned char) s[4]; result.hi <<= 8;
+  result.hi += (unsigned char) s[5]; result.hi <<= 8;
+  result.hi += (unsigned char) s[6]; result.hi <<= 8;
+  result.hi += (unsigned char) s[7];
+  
+  result.lo += (unsigned char)  s[8]; result.lo <<= 8;
+  result.lo += (unsigned char)  s[9]; result.lo <<= 8;
+  result.lo += (unsigned char) s[10]; result.lo <<= 8;
+  result.lo += (unsigned char) s[11]; result.lo <<= 8;
+  result.lo += (unsigned char) s[12]; result.lo <<= 8;
+  result.lo += (unsigned char) s[13]; result.lo <<= 8;
+  result.lo += (unsigned char) s[14]; result.lo <<= 8;
+  result.lo += (unsigned char) s[15];
+
+  *u = result;
+}