From 35200031e88c65da6a0bde563f20d95c1dd4f464 Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sat, 14 Sep 2019 01:45:31 +0200
Subject: Use struct for bytecode header instead of pointer arithmetic

---
 src/std/misc.c | 54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 54 insertions(+)
 create mode 100644 src/std/misc.c

(limited to 'src/std/misc.c')

diff --git a/src/std/misc.c b/src/std/misc.c
new file mode 100644
index 0000000..f53797d
--- /dev/null
+++ b/src/std/misc.c
@@ -0,0 +1,54 @@
+#include "../../include/std/misc.h"
+
+#if defined(_MSC_VER)
+u16 byteswap16(u16 value) {
+    return _byteswap_ushort(value);
+}
+
+u32 byteswap32(u32 value) {
+    return _byteswap_ulong(value);
+}
+
+u64 byteswap64(u64 value) {
+    return _byteswap_uint64(value);
+}
+#elif defined(__GNUC__)
+u16 byteswap16(u16 value) {
+    return __builtin_bswap16(value);
+}
+u32 byteswap32(u32 value) {
+    return __builtin_bswap32(value);
+}
+u64 byteswap64(u64 value) {
+    return __builtin_bswap64(value);
+}
+#else
+u16 byteswap16(u16 value) {
+    u16 result = 0;
+    result |= (value & 0x00FF) << 8;
+    result |= (value & 0xFF00) >> 8;
+    return result;
+}
+
+u32 byteswap32(u32 value) {
+    u32 result = 0;
+    result |= (value & 0x000000FF) << 24;
+    result |= (value & 0x0000FF00) << 8;
+    result |= (value & 0x00FF0000) >> 8;
+    result |= (value & 0xFF000000) >> 24;
+    return result;
+}
+
+u64 byteswap64(u64 value) {
+    u64 result = 0;
+    result |= (value & 0x00000000000000FF) << 56;
+    result |= (value & 0x000000000000FF00) << 40;
+    result |= (value & 0x0000000000FF0000) << 24;
+    result |= (value & 0x00000000FF000000) << 8;
+    result |= (value & 0x000000FF00000000) >> 8;
+    result |= (value & 0x0000FF0000000000) >> 24;
+    result |= (value & 0x00FF000000000000) >> 40;
+    result |= (value & 0xFF00000000000000) >> 56;
+    return result;
+}
+#endif
-- 
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