Diff: mbed-os/features/filesystem/FileSystem.cpp

Revision:

0:9b3d4731edbb

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os/features/filesystem/FileSystem.cpp	Thu Jun 21 13:51:43 2018 +0000
@@ -0,0 +1,172 @@
+/* mbed Microcontroller Library
+ * Copyright (c) 2006-2013 ARM Limited
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mbed.h"
+#include "filesystem/Dir.h"
+#include "filesystem/File.h"
+#include "filesystem/FileSystem.h"
+#include <errno.h>
+
+
+FileSystem::FileSystem(const char *name)
+    : FileSystemLike(name)
+{
+}
+
+int FileSystem::reformat(BlockDevice *bd)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::remove(const char *path)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::rename(const char *path, const char *newpath)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::stat(const char *path, struct stat *st)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::mkdir(const char *path, mode_t mode)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::statvfs(const char *path, struct statvfs *buf)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::file_sync(fs_file_t file)
+{
+    return 0;
+}
+
+int FileSystem::file_isatty(fs_file_t file)
+{
+    return false;
+}
+
+off_t FileSystem::file_tell(fs_file_t file)
+{
+    return file_seek(file, 0, SEEK_CUR);
+}
+
+void FileSystem::file_rewind(fs_file_t file)
+{
+    file_seek(file, 0, SEEK_SET);
+}
+
+off_t FileSystem::file_size(fs_file_t file)
+{
+    off_t off = file_tell(file);
+    off_t size = file_seek(file, 0, SEEK_END);
+    file_seek(file, off, SEEK_SET);
+    return size;
+}
+
+int FileSystem::dir_open(fs_dir_t *dir, const char *path)
+{
+    return -ENOSYS;
+}
+
+int FileSystem::dir_close(fs_dir_t dir)
+{
+    return -ENOSYS;
+}
+
+ssize_t FileSystem::dir_read(fs_dir_t dir, struct dirent *ent)
+{
+    return -ENOSYS;
+}
+
+void FileSystem::dir_seek(fs_dir_t dir, off_t offset)
+{
+}
+
+off_t FileSystem::dir_tell(fs_dir_t dir)
+{
+    return 0;
+}
+
+void FileSystem::dir_rewind(fs_dir_t dir)
+{
+    // Note, the may not satisfy rewind on all filesystems
+    dir_seek(dir, 0);
+}
+
+size_t FileSystem::dir_size(fs_dir_t dir)
+{
+    off_t off = dir_tell(dir);
+    size_t size = 0;
+    struct dirent *ent = new struct dirent;
+
+    dir_rewind(dir);
+    while (true) {
+        int res = dir_read(dir, ent);
+        if (res <= 0) {
+            break;
+        }
+
+        size += 1;
+    }
+    dir_seek(dir, off);
+
+    delete ent;
+    return size;
+}
+
+// Internally used file wrapper that manages memory on close
+template <typename F>
+class Managed : public F {
+public:
+    virtual int close() {
+        int err = F::close();
+        delete this;
+        return err;
+    }
+};
+
+int FileSystem::open(FileHandle **file, const char *path, int flags)
+{
+    File *f = new Managed<File>;
+    int err = f->open(this, path, flags);
+    if (err) {
+        delete f;
+        return err;
+    }
+
+    *file = f;
+    return 0;
+}
+
+int FileSystem::open(DirHandle **dir, const char *path) {
+    Dir *d = new Managed<Dir>;
+    int err = d->open(this, path);
+    if (err) {
+        delete d;
+        return err;
+    }
+
+    *dir = d;
+    return 0;
+}