27 lines
926 B
Go
27 lines
926 B
Go
// Copyright 2012 Aaron Jacobs. All Rights Reserved.
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// Author: aaronjjacobs@gmail.com (Aaron Jacobs)
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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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package common
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// Msb returns the most significant bit of the supplied data (which must be
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// non-empty). This is the MSB(L) function of RFC 4493.
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func Msb(buf []byte) uint8 {
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if len(buf) == 0 {
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panic("msb requires non-empty buffer.")
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}
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return buf[0] >> 7
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}
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