Cloning a bunch of stuff from the native_client repository at r6528

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

Index: ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_instance.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_instance.cc	(revision 0)
+++ ppapi/native_client/src/shared/ppapi_proxy/browser_ppp_instance.cc	(revision 0)
@@ -0,0 +1,174 @@
+// 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/browser_ppp_instance.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <limits>
+
+#include "native_client/src/include/checked_cast.h"
+#include "native_client/src/include/nacl_scoped_ptr.h"
+#include "native_client/src/include/portability.h"
+#include "native_client/src/shared/ppapi_proxy/browser_globals.h"
+#include "native_client/src/shared/ppapi_proxy/browser_ppp.h"
+#include "native_client/src/shared/ppapi_proxy/trusted/srpcgen/ppp_rpc.h"
+#include "native_client/src/shared/ppapi_proxy/utility.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/c/pp_var.h"
+#include "ppapi/c/ppp_instance.h"
+
+using nacl::scoped_array;
+
+namespace ppapi_proxy {
+
+namespace {
+
+char* ArgArraySerialize(int argc,
+                        const char* array[],
+                        uint32_t* serial_size) {
+  uint32_t used = 0;
+  for (int i = 0; i < argc; ++i) {
+    // Note that strlen() cannot ever return SIZE_T_MAX, since that would imply
+    // that there were no nulls anywhere in memory, which would lead to
+    // strlen() never terminating. So this assignment is safe.
+    size_t len = strlen(array[i]) + 1;
+    if (len > std::numeric_limits<uint32_t>::max()) {
+      // Overflow, input string is too long.
+      return NULL;
+    }
+    if (used > std::numeric_limits<uint32_t>::max() - len) {
+      // Overflow, output string is too long.
+      return NULL;
+    }
+    used += static_cast<uint32_t>(len);
+  }
+  // Note that there is a check against numeric_limits<uint32_t> in the code
+  // above, which is why this cast is safe.
+  *serial_size = used;
+  char* serial_array = new char[used];
+
+  size_t pos = 0;
+  for (int i = 0; i < argc; ++i) {
+    size_t len = strlen(array[i]) + 1;
+    strncpy(serial_array + pos, array[i], len);
+    pos += len;
+  }
+  return serial_array;
+}
+
+PP_Bool DidCreate(PP_Instance instance,
+                  uint32_t argc,
+                  const char* argn[],
+                  const char* argv[]) {
+  DebugPrintf("PPP_Instance::DidCreate: instance=%"NACL_PRIu32"\n", instance);
+  uint32_t argn_size;
+  scoped_array<char> argn_serial(ArgArraySerialize(argc, argn, &argn_size));
+  if (argn_serial.get() == NULL) {
+    return PP_FALSE;
+  }
+  uint32_t argv_size;
+  scoped_array<char> argv_serial(ArgArraySerialize(argc, argv, &argv_size));
+  if (argv_serial.get() == NULL) {
+    return PP_FALSE;
+  }
+  int32_t int_argc = static_cast<int32_t>(argc);
+  int32_t success;
+  NaClSrpcError srpc_result =
+      PppInstanceRpcClient::PPP_Instance_DidCreate(GetMainSrpcChannel(instance),
+                                                   instance,
+                                                   int_argc,
+                                                   argn_size,
+                                                   argn_serial.get(),
+                                                   argv_size,
+                                                   argv_serial.get(),
+                                                   &success);
+  DebugPrintf("PPP_Instance::DidCreate: %s\n",
+              NaClSrpcErrorString(srpc_result));
+  if (srpc_result != NACL_SRPC_RESULT_OK) {
+    return PP_FALSE;
+  }
+  return static_cast<PP_Bool>(success != 0);
+}
+
+void DidDestroy(PP_Instance instance) {
+  DebugPrintf("PPP_Instance::DidDestroy: instance=%"NACL_PRIu32"\n", instance);
+  NaClSrpcError srpc_result = PppInstanceRpcClient::PPP_Instance_DidDestroy(
+      GetMainSrpcChannel(instance), instance);
+  DebugPrintf("PPP_Instance::DidDestroy: %s\n",
+              NaClSrpcErrorString(srpc_result));
+}
+
+void DidChangeView(PP_Instance instance,
+                   const PP_Rect* position,
+                   const PP_Rect* clip) {
+  DebugPrintf("PPP_Instance::DidChangeView: instance=%"NACL_PRIu32"\n",
+              instance);
+  int32_t position_array[4];
+  const uint32_t kPositionArraySize = NACL_ARRAY_SIZE(position_array);
+  position_array[0] = position->point.x;
+  position_array[1] = position->point.y;
+  position_array[2] = position->size.width;
+  position_array[3] = position->size.height;
+  int32_t clip_array[4];
+  const uint32_t kClipArraySize = NACL_ARRAY_SIZE(clip_array);
+  clip_array[0] = clip->point.x;
+  clip_array[1] = clip->point.y;
+  clip_array[2] = clip->size.width;
+  clip_array[3] = clip->size.height;
+  NaClSrpcError srpc_result = PppInstanceRpcClient::PPP_Instance_DidChangeView(
+      GetMainSrpcChannel(instance),
+      instance,
+      kPositionArraySize,
+      position_array,
+      kClipArraySize,
+      clip_array);
+  DebugPrintf("PPP_Instance::DidChangeView: %s\n",
+              NaClSrpcErrorString(srpc_result));
+}
+
+void DidChangeFocus(PP_Instance instance, PP_Bool has_focus) {
+  DebugPrintf("PPP_Instance::DidChangeFocus: instance=%"NACL_PRIu32", "
+              "has_focus = %d\n", instance, has_focus);
+  NaClSrpcError srpc_result = PppInstanceRpcClient::PPP_Instance_DidChangeFocus(
+      GetMainSrpcChannel(instance),
+      instance,
+      static_cast<bool>(PP_TRUE == has_focus));
+  DebugPrintf("PPP_Instance::DidChangeFocus: %s\n",
+              NaClSrpcErrorString(srpc_result));
+}
+
+PP_Bool HandleDocumentLoad(PP_Instance instance, PP_Resource url_loader) {
+  DebugPrintf("PPP_Instance::HandleDocumentLoad: instance=%"NACL_PRIu32", "
+              "url_loader=%"NACL_PRIu32"\n", instance, url_loader);
+
+  int32_t result = 0;
+  NaClSrpcError srpc_result =
+      PppInstanceRpcClient::PPP_Instance_HandleDocumentLoad(
+          GetMainSrpcChannel(instance),
+          instance,
+          url_loader,
+          &result);
+
+  DebugPrintf("PPP_Instance::HandleDocumentLoad: %s\n",
+              NaClSrpcErrorString(srpc_result));
+  if (srpc_result == NACL_SRPC_RESULT_OK && result)
+    return PP_TRUE;
+  return PP_FALSE;
+}
+
+}  // namespace
+
+const PPP_Instance* BrowserInstance::GetInterface() {
+  static const PPP_Instance instance_interface = {
+    DidCreate,
+    DidDestroy,
+    DidChangeView,
+    DidChangeFocus,
+    HandleDocumentLoad
+  };
+  return &instance_interface;
+}
+
+}  // namespace ppapi_proxy