Mojo C++ bindings: inline pointer encoding/decoding/validating functions.

mojo/public/cpp/bindings/lib/validation_util.cc

 // Copyright 2015 The Chromium 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 "mojo/public/cpp/bindings/lib/validation_util.h"
 
 #include <stdint.h>
 
 #include <limits>
 
 #include "mojo/public/cpp/bindings/lib/message_internal.h"
 #include "mojo/public/cpp/bindings/lib/serialization_util.h"
 #include "mojo/public/cpp/bindings/lib/validation_errors.h"
 #include "mojo/public/interfaces/bindings/interface_control_messages.mojom.h"
 
 namespace mojo {
 namespace internal {
 
-bool ValidateEncodedPointer(const uint64_t* offset) {
-  // - Make sure |*offset| is no more than 32-bits.
-  // - Cast |offset| to uintptr_t so overflow behavior is well defined across
-  //   32-bit and 64-bit systems.
-  return *offset <= std::numeric_limits<uint32_t>::max() &&
-         (reinterpret_cast<uintptr_t>(offset) +
-              static_cast<uint32_t>(*offset) >=
-          reinterpret_cast<uintptr_t>(offset));
-}
-
 bool ValidateStructHeaderAndClaimMemory(const void* data,
                                         ValidationContext* validation_context) {
   if (!IsAligned(data)) {
     ReportValidationError(validation_context,
                           VALIDATION_ERROR_MISALIGNED_OBJECT);
     return false;
   }
   if (!validation_context->IsValidRange(data, sizeof(StructHeader))) {
     ReportValidationError(validation_context,
                           VALIDATION_ERROR_ILLEGAL_MEMORY_RANGE);
@@ skipping 204 matching lines @@
                                ValidationContext* validation_context) {
   if (validation_context->ClaimHandle(input))
     return true;
 
   ReportValidationError(validation_context, VALIDATION_ERROR_ILLEGAL_HANDLE);
   return false;
 }
 
 }  // namespace internal
 }  // namespace mojo