Change in FS API for fs->open() and fs->close()

src/fs.h

@@ -11,8 +11,8 @@ enum { MG_FS_READ = 1, MG_FS_WRITE = 2, MG_FS_DIR = 4 };
 struct mg_fs {
   int (*stat)(const char *path, size_t *size, time_t *mtime);
   void (*list)(const char *path, void (*fn)(const char *, void *), void *);
-  struct mg_fd *(*open)(const char *path, int flags);      // Open file
-  void (*close)(struct mg_fd *fd);                         // Close file
+  void *(*open)(const char *path, int flags);              // Open file
+  void (*close)(void *fd);                                 // Close file
   size_t (*read)(void *fd, void *buf, size_t len);         // Read file
   size_t (*write)(void *fd, const void *buf, size_t len);  // Write file
   size_t (*seek)(void *fd, size_t offset);                 // Set file position
@@ -23,6 +23,8 @@ struct mg_fd {
   void *fd;
   struct mg_fs *fs;
 };
+struct mg_fd *mg_fs_open(struct mg_fs *fs, const char *path, int flags);
+void mg_fs_close(struct mg_fd *fd);
 
 extern struct mg_fs mg_fs_posix;   // POSIX open/close/read/write/seek
 extern struct mg_fs mg_fs_packed;  // Packed FS, see examples/complete