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 PpapiPermissions::PpapiPermissions(uint32 perms) : permissions_(perms) {}
  16
  17 PpapiPermissions::~PpapiPermissions() {}
  18
  19 // static
  20 PpapiPermissions PpapiPermissions::AllPermissions() {
  21   return PpapiPermissions(PERMISSION_ALL_BITS);
  22 }
  23
  24 // static
  25 PpapiPermissions PpapiPermissions::GetForCommandLine(uint32 base_perms) {
  26   uint32 additional_permissions = 0;
  27
  28 #if !defined(OS_NACL)
  29   // Testing permissions. The testing flag implies all permissions since the
  30   // test plugin needs to test all interfaces.
  31   if (base::CommandLine::ForCurrentProcess()->HasSwitch(
  32           switches::kEnablePepperTesting))
  33     additional_permissions |= ppapi::PERMISSION_ALL_BITS;
  34 #endif
  35
  36   return PpapiPermissions(base_perms | additional_permissions);
  37 }
  38
  39 bool PpapiPermissions::HasPermission(Permission perm) const {
  40   // Check that "perm" is a power of two to make sure the caller didn't set
  41   // more than one permission bit. We may want to change how permissions are
  42   // represented in the future so don't want callers making assumptions about
  43   // bits.
  44   uint32 perm_int = static_cast<uint32>(perm);
  45   if (!perm_int)
  46     return true;  // You always have "no permission".
  47   DCHECK((perm_int & (perm_int - 1)) == 0);
  48   return !!(permissions_ & perm_int);
  49 }
  50
  51 }  // namespace ppapi