Roderick Sheeter | 437bbad | 2013-11-19 14:32:56 -0800 | [diff] [blame] | 1 | // Copyright 2013 Google Inc. All Rights Reserved. |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | // |
| 15 | // Helper functions for storing integer values into byte streams. |
| 16 | // No bounds checking is performed, that is the responsibility of the caller. |
| 17 | |
| 18 | #ifndef BROTLI_WOFF2_STORE_BYTES_H_ |
| 19 | #define BROTLI_WOFF2_STORE_BYTES_H_ |
| 20 | |
| 21 | #include <inttypes.h> |
| 22 | #include <stddef.h> |
| 23 | #include <string.h> |
| 24 | |
| 25 | namespace woff2 { |
| 26 | |
| 27 | inline size_t StoreU32(uint8_t* dst, size_t offset, uint32_t x) { |
| 28 | dst[offset] = x >> 24; |
| 29 | dst[offset + 1] = x >> 16; |
| 30 | dst[offset + 2] = x >> 8; |
| 31 | dst[offset + 3] = x; |
| 32 | return offset + 4; |
| 33 | } |
| 34 | |
| 35 | inline size_t Store16(uint8_t* dst, size_t offset, int x) { |
| 36 | dst[offset] = x >> 8; |
| 37 | dst[offset + 1] = x; |
| 38 | return offset + 2; |
| 39 | } |
| 40 | |
| 41 | inline void StoreU32(uint32_t val, size_t* offset, uint8_t* dst) { |
| 42 | dst[(*offset)++] = val >> 24; |
| 43 | dst[(*offset)++] = val >> 16; |
| 44 | dst[(*offset)++] = val >> 8; |
| 45 | dst[(*offset)++] = val; |
| 46 | } |
| 47 | |
| 48 | inline void Store16(int val, size_t* offset, uint8_t* dst) { |
| 49 | dst[(*offset)++] = val >> 8; |
| 50 | dst[(*offset)++] = val; |
| 51 | } |
| 52 | |
| 53 | inline void StoreBytes(const uint8_t* data, size_t len, |
| 54 | size_t* offset, uint8_t* dst) { |
| 55 | memcpy(&dst[*offset], data, len); |
| 56 | *offset += len; |
| 57 | } |
| 58 | |
| 59 | } // namespace woff2 |
| 60 | |
| 61 | #endif // BROTLI_WOFF2_STORE_BYTES_H_ |