Removed the windows-specific code from cflash and fat files.

Moved the directory access code in fs.c/.h
fs.c is still windows-specific code, I'll have to write a
POSIX version of that file.

desmume/src/Makefile.am

@@ -8,4 +8,5 @@ libdesmume_a_SOURCES = \
 	FIFO.c FIFO.h \
         GPU.cpp GPU.hpp debug.c debug.h \
 	MMU.cpp MMU.hpp NDSSystem.cpp NDSSystem.hpp \
-	thumb_instructions.cpp thumb_instructions.hpp
+	thumb_instructions.cpp thumb_instructions.hpp \
+	windows/cflash.cpp windows/cflash.h fs.c fs.h

desmume/src/fs.h

@@ -0,0 +1,29 @@
+#ifndef FS_H
+#define FS_H
+
+#include "types.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define FS_IS_DIR 1
+
+#define FS_ERR_NO_MORE_FILES 1
+
+typedef struct {
+	char cFileName[256];
+	char cAlternateFileName[14];
+	u32 flags;
+} FsEntry;
+
+void * FsReadFirst(const char * path, FsEntry * entry);
+int FsReadNext(void * search, FsEntry * entry);
+void FsClose(void * search);
+int FsError(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif