1 files changed, 62 insertions, 0 deletions
diff --git a/java/javaendian.h b/java/javaendian.h
new file mode 100644
index 00000000..fa6207fe
--- /dev/null
+++ b/java/javaendian.h
@@ -0,0 +1,62 @@
+#pragma once
+#include <stdint.h>
+
+/**
+ * Swap bytes between big endian and local number representation
+ */
+namespace util
+{
+#ifdef MULTIMC_BIG_ENDIAN
+inline uint64_t bigswap(uint64_t x)
+{
+	return x;
+};
+inline uint32_t bigswap(uint32_t x)
+{
+	return x;
+};
+inline uint16_t bigswap(uint16_t x)
+{
+	return x;
+};
+inline int64_t bigswap(int64_t x)
+{
+	return x;
+};
+inline int32_t bigswap(int32_t x)
+{
+	return x;
+};
+inline int16_t bigswap(int16_t x)
+{
+	return x;
+};
+#else
+inline uint64_t bigswap(uint64_t x)
+{
+	return (x>>56) | ((x<<40) & 0x00FF000000000000) | ((x<<24) & 0x0000FF0000000000) | ((x<<8)  & 0x000000FF00000000) |
+			((x>>8)  & 0x00000000FF000000) | ((x>>24) & 0x0000000000FF0000) | ((x>>40) & 0x000000000000FF00) | (x<<56);
+};
+inline uint32_t bigswap(uint32_t x)
+{
+	return (x>>24) | ((x<<8) & 0x00FF0000) | ((x>>8) & 0x0000FF00) | (x<<24);
+};
+inline uint16_t bigswap(uint16_t x)
+{
+	return (x>>8) | (x<<8);
+};
+inline int64_t bigswap(int64_t x)
+{
+	return (x>>56) | ((x<<40) & 0x00FF000000000000) | ((x<<24) & 0x0000FF0000000000) | ((x<<8)  & 0x000000FF00000000) |
+			((x>>8)  & 0x00000000FF000000) | ((x>>24) & 0x0000000000FF0000) | ((x>>40) & 0x000000000000FF00) | (x<<56);
+};
+inline int32_t bigswap(int32_t x)
+{
+	return (x>>24) | ((x<<8) & 0x00FF0000) | ((x>>8) & 0x0000FF00) | (x<<24);
+};
+inline int16_t bigswap(int16_t x)
+{
+	return (x>>8) | (x<<8);
+};
+#endif
+}