Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_file_system.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_file_system.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_file_system.cc	(revision 0)
+++ ppapi/native_client/src/shared/ppapi_proxy/plugin_ppb_file_system.cc	(revision 0)
@@ -0,0 +1,105 @@
+// Copyright (c) 2011 The Native Client 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 "native_client/src/shared/ppapi_proxy/plugin_ppb_file_system.h"
+
+#include "native_client/src/include/portability.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_callback.h"
+#include "native_client/src/shared/ppapi_proxy/plugin_globals.h"
+#include "native_client/src/shared/ppapi_proxy/utility.h"
+#include "ppapi/c/pp_completion_callback.h"
+#include "ppapi/c/pp_errors.h"
+#include "srpcgen/ppb_rpc.h"
+
+namespace ppapi_proxy {
+
+namespace {
+
+PP_Resource Create(PP_Instance instance, PP_FileSystemType type) {
+  DebugPrintf("PPB_FileSystem::Create: instance=%"NACL_PRIu32" "
+              "type=%"NACL_PRIu32"\n",
+              instance, type);
+  PP_Resource pp_resource = kInvalidResourceId;
+  NaClSrpcError srpc_result =
+      PpbFileSystemRpcClient::PPB_FileSystem_Create(
+          GetMainSrpcChannel(),
+          instance,
+          type,
+          &pp_resource);
+  DebugPrintf("PPB_FileSystem::Create: %s\n",
+              NaClSrpcErrorString(srpc_result));
+  if (srpc_result == NACL_SRPC_RESULT_OK)
+    return pp_resource;
+  return kInvalidResourceId;
+}
+
+PP_Bool IsFileSystem(PP_Resource resource) {
+  DebugPrintf("PPB_FileSystem::IsFileSystem: resource=%"NACL_PRIu32"\n",
+              resource);
+  int32_t is_file_system = 0;
+  NaClSrpcError srpc_result =
+      PpbFileSystemRpcClient::PPB_FileSystem_IsFileSystem(
+          GetMainSrpcChannel(),
+          resource,
+          &is_file_system);
+  DebugPrintf("PPB_FileSystem::IsFileSystem: %s\n",
+              NaClSrpcErrorString(srpc_result));
+  if (NACL_SRPC_RESULT_OK != srpc_result) {
+    return PP_FALSE;
+  }
+  return PP_FromBool(is_file_system);
+}
+
+int32_t Open(PP_Resource file_system,
+             int64_t expected_size,
+             struct PP_CompletionCallback callback) {
+  DebugPrintf("PPB_FileSystem::Open: file_system=%"NACL_PRIu32"\n",
+              file_system);
+  int32_t callback_id = CompletionCallbackTable::Get()->AddCallback(callback);
+  if (callback_id == 0)
+    return PP_ERROR_BADARGUMENT;
+
+  int32_t pp_error;
+  NaClSrpcError srpc_result =
+      PpbFileSystemRpcClient::PPB_FileSystem_Open(
+          GetMainSrpcChannel(),
+          file_system,
+          expected_size,
+          callback_id,
+          &pp_error);
+  DebugPrintf("PPB_FileSystem::Open: %s\n",
+              NaClSrpcErrorString(srpc_result));
+  if (srpc_result != NACL_SRPC_RESULT_OK)
+    pp_error = PP_ERROR_FAILED;
+  return MayForceCallback(callback, pp_error);
+}
+
+PP_FileSystemType GetType(PP_Resource file_system) {
+  DebugPrintf("PPB_FileSystem::GetType: file_system=%"NACL_PRIu32"\n",
+              file_system);
+  int32_t type = PP_FILESYSTEMTYPE_INVALID;
+  NaClSrpcError srpc_result =
+      PpbFileSystemRpcClient::PPB_FileSystem_GetType(
+          GetMainSrpcChannel(),
+          file_system,
+          &type);
+  DebugPrintf("PPB_FileSystem::GetType: %s\n",
+              NaClSrpcErrorString(srpc_result));
+  if (srpc_result == NACL_SRPC_RESULT_OK)
+    return static_cast<PP_FileSystemType>(type);
+  return PP_FILESYSTEMTYPE_INVALID;
+}
+
+}  // namespace
+
+const PPB_FileSystem* PluginFileSystem::GetInterface() {
+  static const PPB_FileSystem file_system_interface = {
+    Create,
+    IsFileSystem,
+    Open,
+    GetType
+  };
+  return &file_system_interface;
+}
+}  // namespace ppapi_proxy