1 /* 2 * Copyright (C) 2016 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #ifndef _NANOHUB_CRC_H_ 18 #define _NANOHUB_CRC_H_ 19 20 #include <stddef.h> 21 #include <stdint.h> 22 23 #define CRC_RESIDUE 0xC704DD7BUL 24 #define CRC_INIT 0xFFFFFFFFUL 25 26 /** 27 * Implements CRC with the following parameters: 28 * 29 * Width: 32 30 * Poly: 04C11DB7 31 * Init: FFFFFFFF 32 * RefIn: False 33 * RefOut: False 34 * XorOut: 00000000 35 * 36 * The CRC implementation will pad the buffer with zeroes to the nearest 37 * multiple of 4 bytes (if necessary). 38 */ 39 uint32_t crc32(const void *buf, size_t size, uint32_t crc); 40 41 /* concrete public implementation of crc32() w/o HW acceleration */ 42 uint32_t soft_crc32(const void *buf, size_t size, uint32_t crc); 43 44 45 #endif /* _NANOHUB_CRC_H_ */ 46
