From 9a34028dd6a8526a18c1a23c21cbb86b325e1560 Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <icculus@icculus.org>
Date: Sun, 1 Nov 2009 16:41:49 -0500
Subject: [PATCH] chdir to base of app bundle on the Mac.

---
 Source/OpenGL_Windows.cpp | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/Source/OpenGL_Windows.cpp b/Source/OpenGL_Windows.cpp
index 59df351..a64f5e4 100644
--- a/Source/OpenGL_Windows.cpp
+++ b/Source/OpenGL_Windows.cpp
@@ -1442,6 +1442,19 @@ static inline void chdirToAppPath(const char *argv0)
     char *dir = calcBaseDir(argv0);
     if (dir)
     {
+        #if (defined(__APPLE__) && defined(__MACH__))
+        // Chop off /Contents/MacOS if it's at the end of the string, so we
+        //  land in the base of the app bundle.
+        const size_t len = strlen(dir);
+        const char *bundledirs = "/Contents/MacOS";
+        const size_t bundledirslen = strlen(bundledirs);
+        if (len > bundledirslen)
+        {
+            char *ptr = (dir + len) - bundledirslen;
+            if (strcasecmp(ptr, bundledirs) == 0)
+                *ptr = '\0';
+        }
+        #endif
         chdir(dir);
         free(dir);
     }
-- 
2.39.2