[ZH] Add endian compat for StdBIGFileSystem

Author: Mauller

Dependencies/Utility/Utility/endian_compat.h

@@ -0,0 +1,82 @@
+/*
+**	Command & Conquer Generals Zero Hour(tm)
+**	Copyright 2025 TheSuperHackers
+**
+**	This program is free software: you can redistribute it and/or modify
+**	it under the terms of the GNU General Public License as published by
+**	the Free Software Foundation, either version 3 of the License, or
+**	(at your option) any later version.
+**
+**	This program is distributed in the hope that it will be useful,
+**	but WITHOUT ANY WARRANTY; without even the implied warranty of
+**	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+**	GNU General Public License for more details.
+**
+**	You should have received a copy of the GNU General Public License
+**	along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+// This file contains macros to help with endian conversions between different endian systems.
+#pragma once
+
+#if defined(__linux__) || defined(__CYGWIN__)
+#include <endian.h>
+
+#elif defined(__APPLE__)
+#include <libkern/OSByteOrder.h>
+
+#define htobe16(x) OSSwapHostToBigInt16(x)
+#define htole16(x) OSSwapHostToLittleInt16(x)
+#define be16toh(x) OSSwapBigToHostInt16(x)
+#define le16toh(x) OSSwapLittleToHostInt16(x)
+
+#define htobe32(x) OSSwapHostToBigInt32(x)
+#define htole32(x) OSSwapHostToLittleInt32(x)
+#define be32toh(x) OSSwapBigToHostInt32(x)
+#define le32toh(x) OSSwapLittleToHostInt32(x)
+
+#define htobe64(x) OSSwapHostToBigInt64(x)
+#define htole64(x) OSSwapHostToLittleInt64(x)
+#define be64toh(x) OSSwapBigToHostInt64(x)
+#define le64toh(x) OSSwapLittleToHostInt64(x)
+
+#elif defined(__OpenBSD__)
+#include <sys/endian.h>
+
+#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__DragonFly__)
+#include <sys/endian.h>
+
+#define be16toh(x) betoh16(x)
+#define le16toh(x) letoh16(x)
+
+#define be32toh(x) betoh32(x)
+#define le32toh(x) letoh32(x)
+
+#define be64toh(x) betoh64(x)
+#define le64toh(x) letoh64(x)
+
+#elif defined(_WIN32) || defined(_WIN64))
+#if defined (_MSC_VER)
+#include <intrin.h>
+#else
+#include <stdlib.h>
+#endif // _MSC_VER
+
+#define htobe16(x) _byteswap_ushort(x)
+#define htole16(x) (x)
+#define be16toh(x) _byteswap_ushort(x)
+#define le16toh(x) (x)
+
+#define htobe32(x) _byteswap_ulong(x)
+#define htole32(x) (x)
+#define be32toh(x) _byteswap_ulong(x)
+#define le32toh(x) (x)
+
+#define htobe64(x) _byteswap_uint64(x)
+#define htole64(x) (x)
+#define be64toh(x) _byteswap_uint64(x)
+#define le64toh(x) (x)
+
+#else
+#error platform not supported
+#endif

GeneralsMD/Code/GameEngineDevice/Source/StdDevice/Common/StdBIGFileSystem.cpp

@@ -36,6 +36,7 @@
 #include "StdDevice/Common/StdBIGFile.h"
 #include "StdDevice/Common/StdBIGFileSystem.h"
 #include "Common/Registry.h"
+#include "Utility/endian_compat.h"
 
 static const char *BIGFileIdentifier = "BIGF";
 
@@ -113,7 +114,7 @@ ArchiveFile * StdBIGFileSystem::openArchiveFile(const Char *filename) {
 	// read in the number of files contained in this BIG file.
 	// change the order of the bytes cause the file size is in reverse byte order for some reason.
 	fp->read(&numLittleFiles, 4);
-	numLittleFiles = ntohl(numLittleFiles);
+	numLittleFiles = be32toh(numLittleFiles);
 
 	DEBUG_LOG(("StdBIGFileSystem::openArchiveFile - %d are contained in archive\n", numLittleFiles));
 //	for (Int i = 0; i < 2; ++i) {
@@ -133,8 +134,8 @@ ArchiveFile * StdBIGFileSystem::openArchiveFile(const Char *filename) {
 		fp->read(&fileOffset, 4);
 		fp->read(&filesize, 4);
 
-		filesize = ntohl(filesize);
-		fileOffset = ntohl(fileOffset);
+		filesize = be32toh(filesize);
+		fileOffset = be32toh(fileOffset);
 
 		fileInfo->m_archiveFilename = archiveFileName;
 		fileInfo->m_offset = fileOffset;