Initial commit of progress, minimal formatting niave free list

lfs_bd.h

@@ -10,6 +10,9 @@
 #include "lfs_config.h"
 
 
+// Opaque type for block devices
+typedef void lfs_bd_t;
+
 // Description of block devices
 struct lfs_bd_info {
     lfs_size_t read_size;   // Size of readable block
@@ -27,29 +30,29 @@ struct lfs_bd_info {
 // block device
 struct lfs_bd_ops {
     // Read a block
-    lfs_error_t (*read)(void *bd, uint8_t *buffer,
+    lfs_error_t (*read)(lfs_bd_t *bd, uint8_t *buffer,
             lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
 
     // Program a block
     //
     // The block must have previously been erased.
-    lfs_error_t (*write)(void *bd, const uint8_t *buffer,
+    lfs_error_t (*write)(lfs_bd_t *bd, const uint8_t *buffer,
             lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
 
     // Erase a block
     //
     // A block must be erased before being programmed. The
     // state of an erased block is undefined.
-    lfs_error_t (*erase)(void *bd,
+    lfs_error_t (*erase)(lfs_bd_t *bd,
             lfs_ino_t ino, lfs_off_t off, lfs_size_t size);
 
     // Sync the block device
-    lfs_error_t (*sync)(void *bd);
+    lfs_error_t (*sync)(lfs_bd_t *bd);
 
     // Get a description of the block device
     //
     // Any unknown information may be left as zero
-    lfs_error_t (*info)(void *bd, struct lfs_bd_info *info);
+    lfs_error_t (*info)(lfs_bd_t *bd, struct lfs_bd_info *info);
 };