Cloning a bunch of stuff from the native_client repository at r6528

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

+/*
+  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/include/nacl_macros.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/plugin_nacl_file.h"
+#include "native_client/src/shared/ppapi_proxy/utility.h"
+#include "native_client/src/shared/srpc/nacl_srpc.h"
+#include "ppapi/c/pp_errors.h"
+#include "srpcgen/ppb_rpc.h"
+
+namespace ppapi_proxy {
+
+int32_t StreamAsFile(PP_Instance instance,
+                     const char* url,
+                     struct PP_CompletionCallback callback) {
+  DebugPrintf("NaClFile::StreamAsFile: instance=%"NACL_PRIu32" url=%s\n",
+              instance, url);
+
+  int32_t callback_id =
+      CompletionCallbackTable::Get()->AddCallback(callback);
+  if (callback_id == 0)
+    return PP_ERROR_BADARGUMENT;
+
+  NaClSrpcError srpc_result = NaClFileRpcClient::StreamAsFile(
+          GetMainSrpcChannel(), instance, const_cast<char*>(url), callback_id);
+  DebugPrintf("NaClFile::StreamAsFile: %s\n", NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result == NACL_SRPC_RESULT_OK)
+    return PP_OK_COMPLETIONPENDING;
+  return MayForceCallback(callback, PP_ERROR_FAILED);
+}
+
+
+int GetFileDesc(PP_Instance instance, const char* url) {
+  DebugPrintf("NaClFile::GetFileDesc: instance=%"NACL_PRIu32" url=%s\n",
+              instance, url);
+
+  int file_desc;
+  NaClSrpcError srpc_result = NaClFileRpcClient::GetFileDesc(
+      GetMainSrpcChannel(), instance, const_cast<char*>(url), &file_desc);
+  DebugPrintf("NaClFile::GetFileDesc: %s\n", NaClSrpcErrorString(srpc_result));
+
+  if (srpc_result == NACL_SRPC_RESULT_OK)
+    return file_desc;
+  return NACL_NO_FILE_DESC;
+}
+
+}  // namespace ppapi_proxy