- #if defined(WIN32) || defined(__NT__)
- /* TODO To support 64-bit file offset we probably need fseeki64(). */
- #define sdSeekFile fseek
- #define sdTellFile ftell
- #else
- #define sdSeekFile fseeko
- #define sdTellFile ftello
- #endif
+
+ /*
+ * Note that fseek() and ftell() only support a long file offset.
+ * So 64-bit offsets may not be supported on some platforms.
+ * At one point we supported fseeko() and ftello() but they require
+ * the off_t data type, which is not very portable.
+ * So we decided to sacrifice vary large file support in
+ * favor of portability.
+ */
+ #define sdSeekFile fseek
+ #define sdTellFile ftell
+