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41 lines
1.0 KiB
41 lines
1.0 KiB
10 years ago
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/*
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* Mini Object Storage, (C) 2014 Minio, Inc.
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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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10 years ago
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// +build amd64
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10 years ago
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10 years ago
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package crc32c
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10 years ago
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10 years ago
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// #include <stdint.h>
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// uint32_t crc32c_pcl(uint8_t *buf, int32_t len, uint32_t prev_crc);
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import "C"
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import (
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"errors"
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"unsafe"
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)
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func Crc32c(buffer []byte) (uint32, error) {
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var length = len(buffer)
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if length == 0 {
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return 0, errors.New("Invalid input")
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}
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var cbuf *C.uint8_t
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cbuf = (*C.uint8_t)(unsafe.Pointer(&buffer[0]))
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crc := C.crc32c_pcl(cbuf, C.int32_t(length), C.uint32_t(0))
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return uint32(crc), nil
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}
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