From 6ccff2cbdebca38e4913b679784a4865edfbb12a Mon Sep 17 00:00:00 2001
From: Nils Schneider <nils.schneider@gmail.com>
Date: Tue, 27 Sep 2011 20:16:07 +0200
Subject: remove cryptopp dependency, add simple unittest for SHA256Transform()

---
 src/util.h | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

(limited to 'src/util.h')

diff --git a/src/util.h b/src/util.h
index f0b2f4a71c..14853a0a2e 100644
--- a/src/util.h
+++ b/src/util.h
@@ -726,4 +726,29 @@ inline bool AffinityBugWorkaround(void(*pfn)(void*))
     return false;
 }
 
+template <class T> inline T rotlFixed(T x, unsigned int y)
+{
+	assert(y < sizeof(T)*8);
+	return T((x<<y) | (x>>(sizeof(T)*8-y)));
+}
+
+template <class T> inline T rotrFixed(T x, unsigned int y)
+{
+	assert(y < sizeof(T)*8);
+	return T((x>>y) | (x<<(sizeof(T)*8-y)));
+}
+
+inline uint32_t ByteReverse(uint32_t value)
+{
+#if defined(__MWERKS__) && TARGET_CPU_PPC
+	return (uint32_t)__lwbrx(&value,0);
+#elif _MSC_VER >= 1400 || (_MSC_VER >= 1300 && !defined(_DLL))
+	return _byteswap_ulong(value);
+#else
+	// 6 instructions with rotate instruction, 8 without
+	value = ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8);
+	return rotlFixed(value, 16U);
+#endif
+}
+
 #endif
-- 
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