/usr/share/gocode/src/github.com/jacobsa/crypto/common/msb.go is in golang-github-jacobsa-crypto-dev 0.0~git20161111.0.293ce0c-3.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 | // Copyright 2012 Aaron Jacobs. All Rights Reserved.
// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
//
// 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.
package common
// Msb returns the most significant bit of the supplied data (which must be
// non-empty). This is the MSB(L) function of RFC 4493.
func Msb(buf []byte) uint8 {
if len(buf) == 0 {
panic("msb requires non-empty buffer.")
}
return buf[0] >> 7
}
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