dir.c

   1 /*
   2  * All the functions related with dir, like open/read/closedir, are
   3  * implemented here.
   4  *
   5  * Copyright (C) 2009 Liu Aleaxander -- All rights reserved. This file
   6  * can be redistributed under the terms of the GNU Public License.
   7  */
   8
   9 #include <stdio.h>
  10 #include "fstk.h"
  11 #include "file.h"
  12 #include "dirent.h"
  13 #include "fstk_malloc.h"
  14
  15
  16 DIR * this_dir = NULL;
  17
  18 DIR * fstk_opendir(struct fstk *fs, char *name)
  19 {
  20         DIR *dir = fstk_malloc(sizeof(*dir));
  21
  22         if (!dir) {
  23                 malloc_error("DIR structure");
  24                 return NULL;
  25         }
  26         dir->dd_dir = fstk_open(fs, name);
  27         if (!dir->dd_dir) {
  28                 fstk_free(dir);
  29                 return NULL;
  30         }
  31
  32         return dir;
  33 }
  34
  35
  36 struct dirent *fstk_readdir(DIR *dir)
  37 {
  38         struct fstk *fs = dir->dd_dir->fs;
  39
  40         return fs->ops->readdir(dir->dd_dir);
  41 }
  42
  43
  44 void fstk_closedir(DIR *dir)
  45 {
  46         if (!dir)
  47                 return;
  48         fstk_close(dir->dd_dir);
  49         fstk_free(dir);
  50 }
  51
  52
  53 void set_current_dentry(struct fstk *fs)
  54 {
  55         if (!(this_dir = fstk_opendir(fs, "/")))
  56                 printf("Warning: setting this_dir error\n");
  57 }
  58
  59 void free_current_dentry(void)
  60 {
  61         if (this_dir)
  62                 fstk_closedir(this_dir);
  63 }