From 844e53910d4aa2c72172a8e4e68acf8de8a103d3 Mon Sep 17 00:00:00 2001
From: calcium <calciumos2@gmail.com>
Date: Sat, 24 Aug 2024 23:34:33 -0400
Subject: [PATCH] Added win32 support.

---
 CMakeLists.txt      |  7 +++----
 include/BigEndian.h | 15 +++++++++++++--
 2 files changed, 16 insertions(+), 6 deletions(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 8fa5111..deff9a0 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -10,9 +10,6 @@ include_directories(${CMAKE_BINARY_DIR})
 set(CMAKE_EXPORT_COMPILE_COMMANDS ON)
 set(CXX_STANDARD 23)
 
-set(BUILD_TESTS OFF)
-set(BUILD_BENCHMARK OFF)
-
 set(CAVM_RUNTIME_CHECK_SUPPORT ON)
 
 add_subdirectory(src)
@@ -26,4 +23,6 @@ message("src " ${CONSTANT_POOL_TAG_SRC})
 add_executable(parser
     ${CONSTANT_POOL_TAG_SRC}
 )
-set(CMAKE_CXX_FLAGS "-std=c++${CXX_STANDARD} -O0 -g -Wpedantic")
\ No newline at end of file
+if (UNIX)
+    set(CMAKE_CXX_FLAGS "-std=c++${CXX_STANDARD} -O0 -g -Wpedantic")
+endif()
\ No newline at end of file
diff --git a/include/BigEndian.h b/include/BigEndian.h
index 446c32b..a0bc1de 100644
--- a/include/BigEndian.h
+++ b/include/BigEndian.h
@@ -4,6 +4,17 @@
 #include <Types.h>
 #include <cstddef>
 
+#ifdef _MSC_VER
+
+#include <intrin.h>
+
+#define __builtin_bswap16 _byteswap_ushort
+#define __builtin_bswap32 _byteswap_ulong
+#define __builtin_bswap64 _byteswap_uint64
+
+#endif
+
+
 template <typename T>
 class BigEndian
 {
@@ -33,8 +44,8 @@ class BigEndian
 				return __builtin_bswap32(val);
 			case 8:
 				return __builtin_bswap64(val);
-			// Clang doesn't support __builtin_bswap128, so we fall back to a generic byte-order swap implementation
-			#ifndef __clang__
+			// Only gcc has a 128-bit byte-order swap builtin, so we fall back to a generic byte-order swap implementation for clang and for msvc
+			#if not defined(__clang__) && not defined(_MSC_VER)
 			case 16:
 				return __builtin_bswap128(val);
 			#endif