Make the fuchsia mojo/public repo the source of truth.

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 <limits>
-#include <string>
-
-#include "mojo/public/cpp/bindings/lib/bindings_serialization.h"
-#include "mojo/public/cpp/bindings/lib/validation_errors.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));
-}
-
-ValidationError ValidateStructHeaderAndClaimMemory(
-    const void* data,
-    BoundsChecker* bounds_checker,
-    std::string* err) {
-  if (!IsAligned(data)) {
-    MOJO_INTERNAL_DEBUG_SET_ERROR_MSG(err) << "";
-    return ValidationError::MISALIGNED_OBJECT;
-  }
-  if (!bounds_checker->IsValidRange(data, sizeof(StructHeader))) {
-    MOJO_INTERNAL_DEBUG_SET_ERROR_MSG(err) << "";
-    return ValidationError::ILLEGAL_MEMORY_RANGE;
-  }
-
-  const StructHeader* header = static_cast<const StructHeader*>(data);
-
-  if (header->num_bytes < sizeof(StructHeader)) {
-    MOJO_INTERNAL_DEBUG_SET_ERROR_MSG(err) << "";
-    return ValidationError::UNEXPECTED_STRUCT_HEADER;
-  }
-
-  if (!bounds_checker->ClaimMemory(data, header->num_bytes)) {
-    MOJO_INTERNAL_DEBUG_SET_ERROR_MSG(err) << "";
-    return ValidationError::ILLEGAL_MEMORY_RANGE;
-  }
-
-  return ValidationError::NONE;
-}
-
-}  // namespace internal
-}  // namespace mojo