From dedcf4f94fb7c2a7bcc2217ab4bfb063fa021528 Mon Sep 17 00:00:00 2001
From: Kawe Mazidjatari <48657826+Mauler125@users.noreply.github.com>
Date: Sat, 12 Oct 2024 01:49:49 +0200
Subject: [PATCH] Recast: add >4GB file support for OBJ mesh loader

Needed for very large levels.
---
 src/naveditor/MeshLoaderObj.cpp | 16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/src/naveditor/MeshLoaderObj.cpp b/src/naveditor/MeshLoaderObj.cpp
index 693e8e15..fa3b2a34 100644
--- a/src/naveditor/MeshLoaderObj.cpp
+++ b/src/naveditor/MeshLoaderObj.cpp
@@ -18,6 +18,14 @@
 
 #include "NavEditor/Include/MeshLoaderObj.h"
 
+#ifdef _WIN32
+#define ftell64 _ftelli64
+#define fseeki64 _fseeki64
+#else
+#define ftell64 ftello
+#define fseeki64 fseeko
+#endif
+
 rcMeshLoaderObj::rcMeshLoaderObj() :
 	m_scale(1.0f),
 	m_verts(0),
@@ -139,18 +147,18 @@ bool rcMeshLoaderObj::load(const std::string& filename)
 	FILE* fp = fopen(filename.c_str(), "rb");
 	if (!fp)
 		return false;
-	if (fseek(fp, 0, SEEK_END) != 0)
+	if (fseeki64(fp, 0, SEEK_END) != 0)
 	{
 		fclose(fp);
 		return false;
 	}
-	long bufSize = ftell(fp);
+	const ssize_t bufSize = ftell64(fp);
 	if (bufSize < 0)
 	{
 		fclose(fp);
 		return false;
 	}
-	if (fseek(fp, 0, SEEK_SET) != 0)
+	if (fseeki64(fp, 0, SEEK_SET) != 0)
 	{
 		fclose(fp);
 		return false;
@@ -161,7 +169,7 @@ bool rcMeshLoaderObj::load(const std::string& filename)
 		fclose(fp);
 		return false;
 	}
-	size_t readLen = fread(buf, bufSize, 1, fp);
+	const size_t readLen = fread(buf, bufSize, 1, fp);
 	fclose(fp);
 
 	if (readLen != 1)