--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SDL3/SDL_endian.h	Mon Jan 05 02:15:46 2026 -0500
@@ -0,0 +1,645 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2025 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+/**
+ * # CategoryEndian
+ *
+ * Functions converting endian-specific values to different byte orders.
+ *
+ * These functions either unconditionally swap byte order (SDL_Swap16,
+ * SDL_Swap32, SDL_Swap64, SDL_SwapFloat), or they swap to/from the system's
+ * native byte order (SDL_Swap16LE, SDL_Swap16BE, SDL_Swap32LE, SDL_Swap32BE,
+ * SDL_Swap32LE, SDL_Swap32BE, SDL_SwapFloatLE, SDL_SwapFloatBE). In the
+ * latter case, the functionality is provided by macros that become no-ops if
+ * a swap isn't necessary: on an x86 (littleendian) processor, SDL_Swap32LE
+ * does nothing, but SDL_Swap32BE reverses the bytes of the data. On a PowerPC
+ * processor (bigendian), the macros behavior is reversed.
+ *
+ * The swap routines are inline functions, and attempt to use compiler
+ * intrinsics, inline assembly, and other magic to make byteswapping
+ * efficient.
+ */
+
+#ifndef SDL_endian_h_
+#define SDL_endian_h_
+
+#include <SDL3/SDL_stdinc.h>
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1400)
+/* As of Clang 11, '_m_prefetchw' is conflicting with the winnt.h's version,
+   so we define the needed '_m_prefetch' here as a pseudo-header, until the issue is fixed. */
+#if defined(__clang__) &&  !SDL_HAS_BUILTIN(_m_prefetch)
+#ifndef __PRFCHWINTRIN_H
+#define __PRFCHWINTRIN_H
+static __inline__ void __attribute__((__always_inline__, __nodebug__))
+_m_prefetch(void *__P)
+{
+  __builtin_prefetch(__P, 0, 3 /* _MM_HINT_T0 */);
+}
+#endif /* __PRFCHWINTRIN_H */
+#endif /* __clang__ */
+
+#include <intrin.h>
+#endif
+
+/**
+ *  \name The two types of endianness
+ */
+/* @{ */
+
+
+/**
+ * A value to represent littleendian byteorder.
+ *
+ * This is used with the preprocessor macro SDL_BYTEORDER, to determine a
+ * platform's byte ordering:
+ *
+ * ```c
+ * #if SDL_BYTEORDER == SDL_LIL_ENDIAN
+ * SDL_Log("This system is littleendian.");
+ * #endif
+ * ```
+ *
+ * \since This macro is available since SDL 3.2.0.
+ *
+ * \sa SDL_BYTEORDER
+ * \sa SDL_BIG_ENDIAN
+ */
+#define SDL_LIL_ENDIAN  1234
+
+/**
+ * A value to represent bigendian byteorder.
+ *
+ * This is used with the preprocessor macro SDL_BYTEORDER, to determine a
+ * platform's byte ordering:
+ *
+ * ```c
+ * #if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ * SDL_Log("This system is bigendian.");
+ * #endif
+ * ```
+ *
+ * \since This macro is available since SDL 3.2.0.
+ *
+ * \sa SDL_BYTEORDER
+ * \sa SDL_LIL_ENDIAN
+ */
+#define SDL_BIG_ENDIAN  4321
+
+/* @} */
+
+#ifndef SDL_BYTEORDER
+#ifdef SDL_WIKI_DOCUMENTATION_SECTION
+
+/**
+ * A macro that reports the target system's byte order.
+ *
+ * This is set to either SDL_LIL_ENDIAN or SDL_BIG_ENDIAN (and maybe other
+ * values in the future, if something else becomes popular). This can be
+ * tested with the preprocessor, so decisions can be made at compile time.
+ *
+ * ```c
+ * #if SDL_BYTEORDER == SDL_BIG_ENDIAN
+ * SDL_Log("This system is bigendian.");
+ * #endif
+ * ```
+ *
+ * \since This macro is available since SDL 3.2.0.
+ *
+ * \sa SDL_LIL_ENDIAN
+ * \sa SDL_BIG_ENDIAN
+ */
+#define SDL_BYTEORDER   SDL_LIL_ENDIAN___or_maybe___SDL_BIG_ENDIAN
+#elif defined(SDL_PLATFORM_LINUX) || defined(__GLIBC__)
+#include <endian.h>
+#define SDL_BYTEORDER  __BYTE_ORDER
+#elif defined(SDL_PLATFORM_SOLARIS)
+#include <sys/byteorder.h>
+#if defined(_LITTLE_ENDIAN)
+#define SDL_BYTEORDER   SDL_LIL_ENDIAN
+#elif defined(_BIG_ENDIAN)
+#define SDL_BYTEORDER   SDL_BIG_ENDIAN
+#else
+#error Unsupported endianness
+#endif
+#elif defined(SDL_PLATFORM_OPENBSD) || defined(__DragonFly__)
+#include <endian.h>
+#define SDL_BYTEORDER  BYTE_ORDER
+#elif defined(SDL_PLATFORM_FREEBSD) || defined(SDL_PLATFORM_NETBSD)
+#include <sys/endian.h>
+#define SDL_BYTEORDER  BYTE_ORDER
+/* predefs from newer gcc and clang versions: */
+#elif defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__) && defined(__BYTE_ORDER__)
+#if (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+#define SDL_BYTEORDER   SDL_LIL_ENDIAN
+#elif (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__)
+#define SDL_BYTEORDER   SDL_BIG_ENDIAN
+#else
+#error Unsupported endianness
+#endif /**/
+#else
+#if defined(__hppa__) || \
+    defined(__m68k__) || defined(mc68000) || defined(_M_M68K) || \
+    (defined(__MIPS__) && defined(__MIPSEB__)) || \
+    defined(__ppc__) || defined(__POWERPC__) || defined(__powerpc__) || defined(__PPC__) || \
+    defined(__sparc__) || defined(__sparc)
+#define SDL_BYTEORDER   SDL_BIG_ENDIAN
+#else
+#define SDL_BYTEORDER   SDL_LIL_ENDIAN
+#endif
+#endif /* SDL_PLATFORM_LINUX */
+#endif /* !SDL_BYTEORDER */
+
+#ifndef SDL_FLOATWORDORDER
+#ifdef SDL_WIKI_DOCUMENTATION_SECTION
+
+/**
+ * A macro that reports the target system's floating point word order.
+ *
+ * This is set to either SDL_LIL_ENDIAN or SDL_BIG_ENDIAN (and maybe other
+ * values in the future, if something else becomes popular). This can be
+ * tested with the preprocessor, so decisions can be made at compile time.
+ *
+ * ```c
+ * #if SDL_FLOATWORDORDER == SDL_BIG_ENDIAN
+ * SDL_Log("This system's floats are bigendian.");
+ * #endif
+ * ```
+ *
+ * \since This macro is available since SDL 3.2.0.
+ *
+ * \sa SDL_LIL_ENDIAN
+ * \sa SDL_BIG_ENDIAN
+ */
+#define SDL_FLOATWORDORDER   SDL_LIL_ENDIAN___or_maybe___SDL_BIG_ENDIAN
+/* predefs from newer gcc versions: */
+#elif defined(__ORDER_LITTLE_ENDIAN__) && defined(__ORDER_BIG_ENDIAN__) && defined(__FLOAT_WORD_ORDER__)
+#if (__FLOAT_WORD_ORDER__ == __ORDER_LITTLE_ENDIAN__)
+#define SDL_FLOATWORDORDER   SDL_LIL_ENDIAN
+#elif (__FLOAT_WORD_ORDER__ == __ORDER_BIG_ENDIAN__)
+#define SDL_FLOATWORDORDER   SDL_BIG_ENDIAN
+#else
+#error Unsupported endianness
+#endif /**/
+#elif defined(__MAVERICK__)
+/* For Maverick, float words are always little-endian. */
+#define SDL_FLOATWORDORDER   SDL_LIL_ENDIAN
+#elif (defined(__arm__) || defined(__thumb__)) && !defined(__VFP_FP__) && !defined(__ARM_EABI__)
+/* For FPA, float words are always big-endian. */
+#define SDL_FLOATWORDORDER   SDL_BIG_ENDIAN
+#else
+/* By default, assume that floats words follow the memory system mode. */
+#define SDL_FLOATWORDORDER   SDL_BYTEORDER
+#endif /* __FLOAT_WORD_ORDER__ */
+#endif /* !SDL_FLOATWORDORDER */
+
+
+#include <SDL3/SDL_begin_code.h>
+/* Set up for C function definitions, even when using C++ */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* various modern compilers may have builtin swap */
+#if defined(__GNUC__) || defined(__clang__)
+#   define HAS_BUILTIN_BSWAP16 (SDL_HAS_BUILTIN(__builtin_bswap16)) || \
+        (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 8))
+#   define HAS_BUILTIN_BSWAP32 (SDL_HAS_BUILTIN(__builtin_bswap32)) || \
+        (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+#   define HAS_BUILTIN_BSWAP64 (SDL_HAS_BUILTIN(__builtin_bswap64)) || \
+        (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 3))
+
+    /* this one is broken */
+#   define HAS_BROKEN_BSWAP (__GNUC__ == 2 && __GNUC_MINOR__ <= 95)
+#else
+#   define HAS_BUILTIN_BSWAP16 0
+#   define HAS_BUILTIN_BSWAP32 0
+#   define HAS_BUILTIN_BSWAP64 0
+#   define HAS_BROKEN_BSWAP 0
+#endif
+
+/* Byte swap 16-bit integer. */
+#ifndef SDL_WIKI_DOCUMENTATION_SECTION
+#if HAS_BUILTIN_BSWAP16
+#define SDL_Swap16(x) __builtin_bswap16(x)
+#elif (defined(_MSC_VER) && (_MSC_VER >= 1400)) && !defined(__ICL)
+#pragma intrinsic(_byteswap_ushort)
+#define SDL_Swap16(x) _byteswap_ushort(x)
+#elif defined(__i386__) && !HAS_BROKEN_BSWAP
+SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x)
+{
+  __asm__("xchgb %b0,%h0": "=q"(x):"0"(x));
+    return x;
+}
+#elif defined(__x86_64__)
+SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x)
+{
+  __asm__("xchgb %b0,%h0": "=abcd"(x):"0"(x));
+    return x;
+}
+#elif (defined(__powerpc__) || defined(__ppc__))
+SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x)
+{
+    int result;
+
+  __asm__("rlwimi %0,%2,8,16,23": "=&r"(result):"0"(x >> 8), "r"(x));
+    return (Uint16)result;
+}
+#elif (defined(__m68k__) && !defined(__mcoldfire__))
+SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x)
+{
+  __asm__("rorw #8,%0": "=d"(x): "0"(x):"cc");
+    return x;
+}
+#elif defined(__WATCOMC__) && defined(__386__)
+extern __inline Uint16 SDL_Swap16(Uint16);
+#pragma aux SDL_Swap16 = \
+  "xchg al, ah" \
+  parm   [ax]   \
+  modify [ax];
+#else
+SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x)
+{
+    return SDL_static_cast(Uint16, ((x << 8) | (x >> 8)));
+}
+#endif
+#endif
+
+/* Byte swap 32-bit integer. */
+#ifndef SDL_WIKI_DOCUMENTATION_SECTION
+#if HAS_BUILTIN_BSWAP32
+#define SDL_Swap32(x) __builtin_bswap32(x)
+#elif (defined(_MSC_VER) && (_MSC_VER >= 1400)) && !defined(__ICL)
+#pragma intrinsic(_byteswap_ulong)
+#define SDL_Swap32(x) _byteswap_ulong(x)
+#elif defined(__i386__) && !HAS_BROKEN_BSWAP
+SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
+{
+  __asm__("bswap %0": "=r"(x):"0"(x));
+    return x;
+}
+#elif defined(__x86_64__)
+SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
+{
+  __asm__("bswapl %0": "=r"(x):"0"(x));
+    return x;
+}
+#elif (defined(__powerpc__) || defined(__ppc__))
+SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
+{
+    Uint32 result;
+
+  __asm__("rlwimi %0,%2,24,16,23": "=&r"(result): "0" (x>>24),  "r"(x));
+  __asm__("rlwimi %0,%2,8,8,15"  : "=&r"(result): "0" (result), "r"(x));
+  __asm__("rlwimi %0,%2,24,0,7"  : "=&r"(result): "0" (result), "r"(x));
+    return result;
+}
+#elif (defined(__m68k__) && !defined(__mcoldfire__))
+SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
+{
+  __asm__("rorw #8,%0\n\tswap %0\n\trorw #8,%0": "=d"(x): "0"(x):"cc");
+    return x;
+}
+#elif defined(__WATCOMC__) && defined(__386__)
+extern __inline Uint32 SDL_Swap32(Uint32);
+#pragma aux SDL_Swap32 = \
+  "bswap eax"  \
+  parm   [eax] \
+  modify [eax];
+#else
+SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x)
+{
+    return SDL_static_cast(Uint32, ((x << 24) | ((x << 8) & 0x00FF0000) |
+                                    ((x >> 8) & 0x0000FF00) | (x >> 24)));
+}
+#endif
+#endif
+
+/* Byte swap 64-bit integer. */
+#ifndef SDL_WIKI_DOCUMENTATION_SECTION
+#if HAS_BUILTIN_BSWAP64
+#define SDL_Swap64(x) __builtin_bswap64(x)
+#elif (defined(_MSC_VER) && (_MSC_VER >= 1400)) && !defined(__ICL)
+#pragma intrinsic(_byteswap_uint64)
+#define SDL_Swap64(x) _byteswap_uint64(x)
+#elif defined(__i386__) && !HAS_BROKEN_BSWAP
+SDL_FORCE_INLINE Uint64 SDL_Swap64(Uint64 x)
+{
+    union {
+        struct {
+            Uint32 a, b;
+        } s;
+        Uint64 u;
+    } v;
+    v.u = x;
+  __asm__("bswapl %0 ; bswapl %1 ; xchgl %0,%1"
+          : "=r"(v.s.a), "=r"(v.s.b)
+          : "0" (v.s.a),  "1"(v.s.b));
+    return v.u;
+}
+#elif defined(__x86_64__)
+SDL_FORCE_INLINE Uint64 SDL_Swap64(Uint64 x)
+{
+  __asm__("bswapq %0": "=r"(x):"0"(x));
+    return x;
+}
+#elif defined(__WATCOMC__) && defined(__386__)
+extern __inline Uint64 SDL_Swap64(Uint64);
+#pragma aux SDL_Swap64 = \
+  "bswap eax"     \
+  "bswap edx"     \
+  "xchg eax,edx"  \
+  parm [eax edx]  \
+  modify [eax edx];
+#else
+SDL_FORCE_INLINE Uint64 SDL_Swap64(Uint64 x)
+{
+    Uint32 hi, lo;
+
+    /* Separate into high and low 32-bit values and swap them */
+    lo = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
+    x >>= 32;
+    hi = SDL_static_cast(Uint32, x & 0xFFFFFFFF);
+    x = SDL_Swap32(lo);
+    x <<= 32;
+    x |= SDL_Swap32(hi);
+    return (x);
+}
+#endif
+#endif
+
+/**
+ * Byte-swap a floating point number.
+ *
+ * This will always byte-swap the value, whether it's currently in the native
+ * byteorder of the system or not. You should use SDL_SwapFloatLE or
+ * SDL_SwapFloatBE instead, in most cases.
+ *
+ * Note that this is a forced-inline function in a header, and not a public
+ * API function available in the SDL library (which is to say, the code is
+ * embedded in the calling program and the linker and dynamic loader will not
+ * be able to find this function inside SDL itself).
+ *
+ * \param x the value to byte-swap.
+ * \returns x, with its bytes in the opposite endian order.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+SDL_FORCE_INLINE float SDL_SwapFloat(float x)
+{
+    union {
+        float f;
+        Uint32 ui32;
+    } swapper;
+    swapper.f = x;
+    swapper.ui32 = SDL_Swap32(swapper.ui32);
+    return swapper.f;
+}
+
+/* remove extra macros */
+#undef HAS_BROKEN_BSWAP
+#undef HAS_BUILTIN_BSWAP16
+#undef HAS_BUILTIN_BSWAP32
+#undef HAS_BUILTIN_BSWAP64
+
+
+#ifdef SDL_WIKI_DOCUMENTATION_SECTION
+
+/**
+ * Byte-swap an unsigned 16-bit number.
+ *
+ * This will always byte-swap the value, whether it's currently in the native
+ * byteorder of the system or not. You should use SDL_Swap16LE or SDL_Swap16BE
+ * instead, in most cases.
+ *
+ * Note that this is a forced-inline function in a header, and not a public
+ * API function available in the SDL library (which is to say, the code is
+ * embedded in the calling program and the linker and dynamic loader will not
+ * be able to find this function inside SDL itself).
+ *
+ * \param x the value to byte-swap.
+ * \returns `x`, with its bytes in the opposite endian order.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+SDL_FORCE_INLINE Uint16 SDL_Swap16(Uint16 x) { return x_but_byteswapped; }
+
+/**
+ * Byte-swap an unsigned 32-bit number.
+ *
+ * This will always byte-swap the value, whether it's currently in the native
+ * byteorder of the system or not. You should use SDL_Swap32LE or SDL_Swap32BE
+ * instead, in most cases.
+ *
+ * Note that this is a forced-inline function in a header, and not a public
+ * API function available in the SDL library (which is to say, the code is
+ * embedded in the calling program and the linker and dynamic loader will not
+ * be able to find this function inside SDL itself).
+ *
+ * \param x the value to byte-swap.
+ * \returns `x`, with its bytes in the opposite endian order.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+SDL_FORCE_INLINE Uint32 SDL_Swap32(Uint32 x) { return x_but_byteswapped; }
+
+/**
+ * Byte-swap an unsigned 64-bit number.
+ *
+ * This will always byte-swap the value, whether it's currently in the native
+ * byteorder of the system or not. You should use SDL_Swap64LE or SDL_Swap64BE
+ * instead, in most cases.
+ *
+ * Note that this is a forced-inline function in a header, and not a public
+ * API function available in the SDL library (which is to say, the code is
+ * embedded in the calling program and the linker and dynamic loader will not
+ * be able to find this function inside SDL itself).
+ *
+ * \param x the value to byte-swap.
+ * \returns `x`, with its bytes in the opposite endian order.
+ *
+ * \threadsafety It is safe to call this function from any thread.
+ *
+ * \since This function is available since SDL 3.2.0.
+ */
+SDL_FORCE_INLINE Uint64 SDL_Swap64(Uint64 x) { return x_but_byteswapped; }
+
+/**
+ * Swap a 16-bit value from littleendian to native byte order.
+ *
+ * If this is running on a littleendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in littleendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Swap16LE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a 32-bit value from littleendian to native byte order.
+ *
+ * If this is running on a littleendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in littleendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Swap32LE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a 64-bit value from littleendian to native byte order.
+ *
+ * If this is running on a littleendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in littleendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Swap64LE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a floating point value from littleendian to native byte order.
+ *
+ * If this is running on a littleendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in littleendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_SwapFloatLE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a 16-bit value from bigendian to native byte order.
+ *
+ * If this is running on a bigendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in bigendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Swap16BE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a 32-bit value from bigendian to native byte order.
+ *
+ * If this is running on a bigendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in bigendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Swap32BE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a 64-bit value from bigendian to native byte order.
+ *
+ * If this is running on a bigendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in bigendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_Swap64BE(x) SwapOnlyIfNecessary(x)
+
+/**
+ * Swap a floating point value from bigendian to native byte order.
+ *
+ * If this is running on a bigendian system, `x` is returned unchanged.
+ *
+ * This macro never references `x` more than once, avoiding side effects.
+ *
+ * \param x the value to swap, in bigendian byte order.
+ * \returns `x` in native byte order.
+ *
+ * \threadsafety It is safe to call this macro from any thread.
+ *
+ * \since This macro is available since SDL 3.2.0.
+ */
+#define SDL_SwapFloatBE(x) SwapOnlyIfNecessary(x)
+
+#elif SDL_BYTEORDER == SDL_LIL_ENDIAN
+#define SDL_Swap16LE(x)     (x)
+#define SDL_Swap32LE(x)     (x)
+#define SDL_Swap64LE(x)     (x)
+#define SDL_SwapFloatLE(x)  (x)
+#define SDL_Swap16BE(x)     SDL_Swap16(x)
+#define SDL_Swap32BE(x)     SDL_Swap32(x)
+#define SDL_Swap64BE(x)     SDL_Swap64(x)
+#define SDL_SwapFloatBE(x)  SDL_SwapFloat(x)
+#else
+#define SDL_Swap16LE(x)     SDL_Swap16(x)
+#define SDL_Swap32LE(x)     SDL_Swap32(x)
+#define SDL_Swap64LE(x)     SDL_Swap64(x)
+#define SDL_SwapFloatLE(x)  SDL_SwapFloat(x)
+#define SDL_Swap16BE(x)     (x)
+#define SDL_Swap32BE(x)     (x)
+#define SDL_Swap64BE(x)     (x)
+#define SDL_SwapFloatBE(x)  (x)
+#endif
+
+/* Ends C function definitions when using C++ */
+#ifdef __cplusplus
+}
+#endif
+#include <SDL3/SDL_close_code.h>
+
+#endif /* SDL_endian_h_ */