https://bugs.gentoo.org/841296
https://github.com/amule-project/amule/issues/342
https://github.com/amule-project/amule/pull/368

commit 1c57ce9c688d26d95fe8f9d7b7590f4670956749
Author: matoro <matoro@users.noreply.github.com>
Date:   Thu Dec 14 00:28:50 2023 -0500

    SafeFile: do endian-swap on float tag values
    
    There are comments noting that writing raw float values may not be
    endian-correct and indeed it is not.  WX does not provide functions for
    endian-swapping floats, but since amule explicitly uses exclusively
    single-precision (32-bit) floats, just cast it into a uint32_t for the
    swapping.
    
    This is a no-op on little-endian.

diff --git a/src/SafeFile.cpp b/src/SafeFile.cpp
index 30f9a7f23..0d9c4f8e7 100644
--- a/src/SafeFile.cpp
+++ b/src/SafeFile.cpp
@@ -31,6 +31,7 @@
 #include <common/Format.h>		// Needed for CFormat
 #include "CompilerSpecific.h"		// Needed for __FUNCTION__
 
+#include <cstring>              // For std::memcpy
 
 #define CHECK_BOM(size, x) ((size >= 3)  && (x[0] == (char)0xEF) && (x[1] == (char)0xBB) && (x[2] == (char)0xBF))
 
@@ -189,6 +190,10 @@ float CFileDataIO::ReadFloat() const
 {
 	float retVal;
 	Read(&retVal, sizeof(float));
+	uint32_t toswap{};
+	std::memcpy(&toswap, &retVal, sizeof(toswap));
+	toswap = ENDIAN_SWAP_32(toswap);
+	std::memcpy(&retVal, &toswap, sizeof(retVal));
 	return retVal;
 }
 
@@ -306,6 +311,10 @@ void CFileDataIO::WriteHash(const CMD4Hash& value)
 
 void CFileDataIO::WriteFloat(float value)
 {
+	uint32_t toswap{};
+	std::memcpy(&toswap, &value, sizeof(toswap));
+	toswap = ENDIAN_SWAP_32(toswap);
+	std::memcpy(&value, &toswap, sizeof(value));
 	Write(&value, sizeof(float));
 }