1 files changed, 82 insertions, 0 deletions
diff --git a/extmod/vfs_fat_ffconf.c b/extmod/vfs_fat_ffconf.c
new file mode 100644
index 0000000000..f8935af751
--- /dev/null
+++ b/extmod/vfs_fat_ffconf.c
@@ -0,0 +1,82 @@
+/*
+ * This file is part of the Micro Python project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2013, 2014 Damien P. George
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include "py/mpconfig.h"
+#if MICROPY_FSUSERMOUNT
+
+#include <string.h>
+
+#include "py/mpstate.h"
+#include "lib/fatfs/ff.h"
+#include "lib/fatfs/ffconf.h"
+#include "lib/fatfs/diskio.h"
+#include "extmod/fsusermount.h"
+
+STATIC bool check_path(const TCHAR **path, const char *mount_point_str, mp_uint_t mount_point_len) {
+    if (strncmp(*path, mount_point_str, mount_point_len) == 0) {
+        if ((*path)[mount_point_len] == '/') {
+            *path += mount_point_len;
+            return true;
+        } else if ((*path)[mount_point_len] == '\0') {
+            *path = "/";
+            return true;
+        }
+    }
+    return false;
+}
+
+// "path" is the path to lookup; will advance this pointer beyond the volume name.
+// Returns logical drive number (-1 means invalid path).
+int ff_get_ldnumber (const TCHAR **path) {
+    if (!(*path)) {
+        return -1;
+    }
+
+    if (**path != '/') {
+        #if _FS_RPATH
+        return ff_CurrVol;
+        #else
+        return -1;
+        #endif
+    }
+
+    for (size_t i = 0; i < MP_ARRAY_SIZE(MP_STATE_PORT(fs_user_mount)); ++i) {
+        fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[i];
+        if (vfs != NULL && check_path(path, vfs->str, vfs->len)) {
+            return i;
+        }
+    }
+
+    return -1;
+}
+
+void ff_get_volname(BYTE vol, TCHAR **dest) {
+    fs_user_mount_t *vfs = MP_STATE_PORT(fs_user_mount)[vol];
+    memcpy(*dest, vfs->str, vfs->len);
+    *dest += vfs->len;
+}
+
+#endif // MICROPY_FSUSERMOUNT