| /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
| /* This Source Code Form is subject to the terms of the Mozilla Public |
| * License, v. 2.0. If a copy of the MPL was not distributed with this |
| * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
| |
| /* Implementations of hash functions. */ |
| |
| #include "mozilla/HashFunctions.h" |
| #include "mozilla/Types.h" |
| |
| #include <string.h> |
| |
| namespace mozilla { |
| |
| uint32_t |
| HashBytes(const void* bytes, size_t length) |
| { |
| uint32_t hash = 0; |
| const char* b = reinterpret_cast<const char*>(bytes); |
| |
| /* Walk word by word. */ |
| size_t i = 0; |
| for (; i < length - (length % sizeof(size_t)); i += sizeof(size_t)) { |
| /* Do an explicitly unaligned load of the data. */ |
| size_t data; |
| memcpy(&data, b + i, sizeof(size_t)); |
| |
| hash = AddToHash(hash, data, sizeof(data)); |
| } |
| |
| /* Get the remaining bytes. */ |
| for (; i < length; i++) |
| hash = AddToHash(hash, b[i]); |
| |
| return hash; |
| } |
| |
| } /* namespace mozilla */ |
