Added opendir, closedir and readdir

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@412 a1c6a512-1295-4272-9138-f99709370657

2 files changed, 104 insertions, 2 deletions

diff --git a/firmware/common/dir.c b/firmware/common/dir.c
new file mode 100644
index 0000000..9388fb2
--- /dev/null
+++ b/firmware/common/dir.c
@@ -0,0 +1,97 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2002 by Björn Stenberg
+ *
+ * All files in this archive are subject to the GNU General Public License.
+ * See the file COPYING in the source tree root for full license agreement.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <string.h>
+#include "fat.h"
+#include "dir.h"
+#include "debug.h"
+#include "types.h"
+
+static DIR thedir;
+static struct dirent theent;
+static bool busy=FALSE;
+
+DIR* opendir(char* name)
+{
+    char* part;
+    struct fat_direntry entry;
+    struct fat_dir* dir = &(thedir.fatdir);
+
+    if ( busy ) {
+        DEBUGF("Only one open dir at a time\n");
+        return NULL;
+    }
+
+    if ( name[0] != '/' ) {
+        DEBUGF("Only absolute paths supported right now\n");
+        return NULL;
+    }
+
+    if ( fat_opendir(dir, 0) < 0 ) {
+        DEBUGF("Failed opening root dir\n");
+        return NULL;
+    }
+
+    while ( (part = strtok(name, "/")) ) {
+        int partlen = strlen(part);
+        /* scan dir for name */
+        while (1) {
+            if (fat_getnext(dir,&entry) < 0)
+                return NULL;
+            if ( !entry.name[0] )
+                return NULL;
+            if ( (entry.attr & FAT_ATTR_DIRECTORY) &&
+                 (!strncmp(part, entry.name, partlen)) ) {
+                if ( fat_opendir(dir, entry.firstcluster) < 0 ) {
+                    DEBUGF("Failed opening dir '%s' (%d)\n",
+                           part, entry.firstcluster);
+                    return NULL;
+                }
+                break;
+            }
+        }
+    }
+
+    busy = TRUE;
+
+    return &thedir;
+}
+
+int closedir(DIR* dir)
+{
+    busy=FALSE;
+    return 0;
+}
+
+struct dirent* readdir(DIR* dir)
+{
+    struct fat_direntry entry;
+
+    if (fat_getnext(&(dir->fatdir),&entry) < 0)
+        return NULL;
+
+    if ( !entry.name[0] )
+        return NULL;
+
+    strncpy(theent.d_name, entry.name, sizeof( theent.d_name ) );
+    theent.attribute = entry.attr;
+    theent.size = entry.filesize;
+
+    return &theent;
+}
diff --git a/firmware/common/dir.h b/firmware/common/dir.h
index 078ede2..2aa2485 100644
--- a/firmware/common/dir.h
+++ b/firmware/common/dir.h
@@ -16,7 +16,6 @@
  * KIND, either express or implied.
  *
  ****************************************************************************/
-
 #ifndef _DIR_H_
 #define _DIR_H_
 
@@ -31,10 +30,16 @@ struct dirent {
 
 
 #ifndef SIMULATOR
+
+#include "fat.h"
+
 typedef struct {
-    int offset;
+    int startcluster;
+    struct fat_dir fatdir;
 } DIR;
+
 #else // SIMULATOR
+
 #ifdef WIN32
 #include <io.h>
 typedef struct DIRtag