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| 1 // Copyright 2013 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 "mojo/public/bindings/lib/bindings_serialization.h" | |
| 6 | |
| 7 #include <assert.h> | |
| 8 | |
| 9 #include "mojo/public/bindings/lib/bindings_internal.h" | |
| 10 | |
| 11 namespace mojo { | |
| 12 namespace internal { | |
| 13 | |
| 14 size_t Align(size_t size) { | |
| 15 const size_t kAlignment = 8; | |
| 16 return size + (kAlignment - (size % kAlignment)) % kAlignment; | |
| 17 } | |
| 18 | |
| 19 void EncodePointer(const void* ptr, uint64_t* offset) { | |
| 20 if (!ptr) { | |
| 21 *offset = 0; | |
| 22 return; | |
| 23 } | |
| 24 | |
| 25 const char* p_obj = reinterpret_cast<const char*>(ptr); | |
| 26 const char* p_slot = reinterpret_cast<const char*>(offset); | |
| 27 assert(p_obj > p_slot); | |
| 28 | |
| 29 *offset = static_cast<uint64_t>(p_obj - p_slot); | |
| 30 } | |
| 31 | |
| 32 const void* DecodePointerRaw(const uint64_t* offset) { | |
| 33 if (!*offset) | |
| 34 return NULL; | |
| 35 return reinterpret_cast<const char*>(offset) + *offset; | |
| 36 } | |
| 37 | |
| 38 bool ValidatePointer(const void* ptr, const Message& message) { | |
| 39 const uint8_t* data = static_cast<const uint8_t*>(ptr); | |
| 40 if (reinterpret_cast<ptrdiff_t>(data) % 8 != 0) | |
| 41 return false; | |
| 42 | |
| 43 const uint8_t* data_start = message.data(); | |
| 44 const uint8_t* data_end = data_start + message.data_num_bytes(); | |
| 45 | |
| 46 return data >= data_start && data < data_end; | |
| 47 } | |
| 48 | |
| 49 void EncodeHandle(Handle* handle, std::vector<Handle>* handles) { | |
| 50 if (handle->is_valid()) { | |
| 51 handles->push_back(*handle); | |
| 52 handle->set_value(static_cast<MojoHandle>(handles->size() - 1)); | |
| 53 } else { | |
| 54 // Encode -1 to mean the invalid handle. | |
| 55 handle->set_value(static_cast<MojoHandle>(-1)); | |
| 56 } | |
| 57 } | |
| 58 | |
| 59 bool DecodeHandle(Handle* handle, std::vector<Handle>* handles) { | |
| 60 // Decode -1 to mean the invalid handle. | |
| 61 if (handle->value() == static_cast<MojoHandle>(-1)) { | |
| 62 *handle = Handle(); | |
| 63 return true; | |
| 64 } | |
| 65 if (handle->value() >= handles->size()) | |
| 66 return false; | |
| 67 // Just leave holes in the vector so we don't screw up other indices. | |
| 68 *handle = FetchAndReset(&handles->at(handle->value())); | |
| 69 return true; | |
| 70 } | |
| 71 | |
| 72 } // namespace internal | |
| 73 } // namespace mojo | |
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Chromium Code Reviews
Issue 220243007:
Mojo: Move mojo/public/bindings/lib to mojo/public/cpp/bindings/lib. (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/src