Add FileIOTrusted class.

BUG=none
TEST=none
Review URL: http://codereview.chromium.org/8965007

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@114720 0039d316-1c4b-4281-b951-d872f2087c98

2 files changed, 90 insertions, 0 deletions

diff --git a/ppapi/cpp/trusted/file_io_trusted.cc b/ppapi/cpp/trusted/file_io_trusted.cc
new file mode 100644
index 0000000..a3123ca
--- /dev/null
+++ b/ppapi/cpp/trusted/file_io_trusted.cc
@@ -0,0 +1,54 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/cpp/trusted/file_io_trusted.h"
+
+#include "ppapi/c/pp_errors.h"
+#include "ppapi/c/trusted/ppb_file_io_trusted.h"
+#include "ppapi/cpp/completion_callback.h"
+#include "ppapi/cpp/file_io.h"
+#include "ppapi/cpp/module_impl.h"
+
+namespace pp {
+
+namespace {
+
+template <> const char* interface_name<PPB_FileIOTrusted>() {
+  return PPB_FILEIOTRUSTED_INTERFACE_0_4;
+}
+
+}  // namespace
+
+FileIO_Trusted::FileIO_Trusted() {
+}
+
+int32_t FileIO_Trusted::GetOSFileDescriptor(const FileIO& file_io) {
+  const int32_t kInvalidOSFileDescriptor = -1;
+  if (!has_interface<PPB_FileIOTrusted>())
+    return kInvalidOSFileDescriptor;
+  return get_interface<PPB_FileIOTrusted>()->GetOSFileDescriptor(
+      file_io.pp_resource());
+}
+
+int32_t FileIO_Trusted::WillWrite(const FileIO& file_io,
+                                  int64_t offset,
+                                  int32_t bytes_to_write,
+                                  const CompletionCallback& callback) {
+  if (!has_interface<PPB_FileIOTrusted>())
+    return callback.MayForce(PP_ERROR_NOINTERFACE);
+  return get_interface<PPB_FileIOTrusted>()->WillWrite(
+      file_io.pp_resource(), offset, bytes_to_write,
+      callback.pp_completion_callback());
+}
+
+int32_t FileIO_Trusted::WillSetLength(const FileIO& file_io,
+                                      int64_t length,
+                                      const CompletionCallback& callback) {
+  if (!has_interface<PPB_FileIOTrusted>())
+    return callback.MayForce(PP_ERROR_NOINTERFACE);
+  return get_interface<PPB_FileIOTrusted>()->WillSetLength(
+      file_io.pp_resource(), length, callback.pp_completion_callback());
+}
+
+}  // namespace pp
diff --git a/ppapi/cpp/trusted/file_io_trusted.h b/ppapi/cpp/trusted/file_io_trusted.h
new file mode 100644
index 0000000..3ba2140
--- /dev/null
+++ b/ppapi/cpp/trusted/file_io_trusted.h
@@ -0,0 +1,36 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_CPP_TRUSTED_FILE_IO_TRUSTED_H_
+#define PPAPI_CPP_TRUSTED_FILE_IO_TRUSTED_H_
+
+#include <string>
+
+#include "ppapi/c/pp_stdint.h"
+
+namespace pp {
+
+class FileIO;
+class CompletionCallback;
+
+class FileIO_Trusted {
+ public:
+  /// Creates a FileIO_Trusted object.
+  FileIO_Trusted();
+
+  int32_t GetOSFileDescriptor(const FileIO& file_io);
+
+  int32_t WillWrite(const FileIO& file_io,
+                    int64_t offset,
+                    int32_t bytes_to_write,
+                    const CompletionCallback& callback);
+
+  int32_t WillSetLength(const FileIO& file_io,
+                        int64_t length,
+                        const CompletionCallback& callback);
+};
+
+}  // namespace pp
+
+#endif  // PPAPI_CPP_TRUSTED_FILE_IO_TRUSTED_H_