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-rw-r--r--uint128p.c100
1 files changed, 100 insertions, 0 deletions
diff --git a/uint128p.c b/uint128p.c
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index 0000000..57c713e
--- /dev/null
+++ b/uint128p.c
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+#include "uint_t.h"
+
+/**
+ @file uint128p.c
+ @author feh, jannis
+ @source 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;
+}