ppapi/shared_impl/ppapi_permissions.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ppapi/shared_impl/ppapi_permissions.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/logging.h"
   9 #include "ppapi/shared_impl/ppapi_switches.h"
  10
  11 namespace ppapi {
  12
  13 PpapiPermissions::PpapiPermissions() : permissions_(0) {
  14 }
  15
  16 PpapiPermissions::PpapiPermissions(uint32 perms) : permissions_(perms) {
  17 }
  18
  19 PpapiPermissions::~PpapiPermissions() {
  20 }
  21
  22 // static
  23 PpapiPermissions PpapiPermissions::AllPermissions() {
  24   return PpapiPermissions(PERMISSION_ALL_BITS);
  25 }
  26
  27 // static
  28 PpapiPermissions PpapiPermissions::GetForCommandLine(uint32 base_perms) {
  29   uint32 additional_permissions = 0;
  30
  31 #if !defined(OS_NACL)
  32   // Testing permissions. The testing flag implies all permissions since the
  33   // test plugin needs to test all interfaces.
  34   if (CommandLine::ForCurrentProcess()->HasSwitch(
  35           switches::kEnablePepperTesting))
  36     additional_permissions |= ppapi::PERMISSION_ALL_BITS;
  37 #endif
  38
  39   return PpapiPermissions(base_perms | additional_permissions);
  40 }
  41
  42 bool PpapiPermissions::HasPermission(Permission perm) const {
  43   // Check that "perm" is a power of two to make sure the caller didn't set
  44   // more than one permission bit. We may want to change how permissions are
  45   // represented in the future so don't want callers making assumptions about
  46   // bits.
  47   uint32 perm_int = static_cast<uint32>(perm);
  48   if (!perm_int)
  49     return true;  // You always have "no permission".
  50   DCHECK((perm_int & (perm_int - 1)) == 0);
  51   return !!(permissions_ & perm_int);
  52 }
  53
  54 }  // namespace ppapi