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34 lines
1.1 KiB
C++
34 lines
1.1 KiB
C++
/* ###
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* IP: GHIDRA
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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/// \file crc32.hh
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/// \brief Table and function for computing a CRC32
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#ifndef __CRC32__
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#define __CRC32__
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#include "types.h"
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extern uint4 crc32tab[]; ///< Table for quickly computing a 32-bit Cyclic Redundacy Check (CRC)
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/// \brief Feed 8 bits into a CRC register
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///
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/// \param reg is the current state of the CRC register
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/// \param val holds 8 bits (least significant) to feed in
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/// \return the new value of the register
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inline uint4 crc_update(uint4 reg,uint4 val) {
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return crc32tab[(reg ^ val)&0xff] ^ (reg>>8); }
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#endif
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