| /* |
| * Copyright 2011 Google Inc. All Rights Reserved. |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #ifndef SFNTLY_CPP_SRC_SFNTLY_PORT_ENDIAN_H_ |
| #define SFNTLY_CPP_SRC_SFNTLY_PORT_ENDIAN_H_ |
| |
| #include "sfntly/port/config.h" |
| #include "sfntly/port/type.h" |
| |
| namespace sfntly { |
| |
| static inline uint16_t EndianSwap16(uint16_t value) { |
| return (uint16_t)((value >> 8) | (value << 8)); |
| } |
| |
| static inline int32_t EndianSwap32(int32_t value) { |
| return (((value & 0x000000ff) << 24) | |
| ((value & 0x0000ff00) << 8) | |
| ((value & 0x00ff0000) >> 8) | |
| ((value & 0xff000000) >> 24)); |
| } |
| |
| static inline uint64_t EndianSwap64(uint64_t value) { |
| return (((value & 0x00000000000000ffLL) << 56) | |
| ((value & 0x000000000000ff00LL) << 40) | |
| ((value & 0x0000000000ff0000LL) << 24) | |
| ((value & 0x00000000ff000000LL) << 8) | |
| ((value & 0x000000ff00000000LL) >> 8) | |
| ((value & 0x0000ff0000000000LL) >> 24) | |
| ((value & 0x00ff000000000000LL) >> 40) | |
| ((value & 0xff00000000000000LL) >> 56)); |
| } |
| |
| #ifdef SFNTLY_LITTLE_ENDIAN |
| #define ToBE16(n) EndianSwap16(n) |
| #define ToBE32(n) EndianSwap32(n) |
| #define ToBE64(n) EndianSwap64(n) |
| #define ToLE16(n) (n) |
| #define ToLE32(n) (n) |
| #define ToLE64(n) (n) |
| #define FromBE16(n) EndianSwap16(n) |
| #define FromBE32(n) EndianSwap32(n) |
| #define FromBE64(n) EndianSwap64(n) |
| #define FromLE16(n) (n) |
| #define FromLE32(n) (n) |
| #define FromLE64(n) (n) |
| #else // SFNTLY_BIG_ENDIAN |
| #define ToBE16(n) (n) |
| #define ToBE32(n) (n) |
| #define ToBE64(n) (n) |
| #define ToLE16(n) EndianSwap16(n) |
| #define ToLE32(n) EndianSwap32(n) |
| #define ToLE64(n) EndianSwap64(n) |
| #define FromBE16(n) (n) |
| #define FromBE32(n) (n) |
| #define FromBE64(n) (n) |
| #define FromLE16(n) EndianSwap16(n) |
| #define FromLE32(n) EndianSwap32(n) |
| #define FromLE64(n) EndianSwap64(n) |
| #endif |
| |
| } // namespace sfntly |
| |
| #endif // SFNTLY_CPP_SRC_SFNTLY_PORT_ENDIAN_H_ |