github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/libraries/utils/set/byteset.go (about)

     1  // Copyright 2019 Dolthub, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package set
    16  
    17  type ByteSet struct {
    18  	bytes map[byte]bool
    19  }
    20  
    21  func NewByteSet(bytes []byte) *ByteSet {
    22  	s := &ByteSet{make(map[byte]bool, len(bytes))}
    23  
    24  	for _, b := range bytes {
    25  		s.bytes[b] = true
    26  	}
    27  
    28  	return s
    29  }
    30  
    31  func (bs *ByteSet) Contains(b byte) bool {
    32  	_, present := bs.bytes[b]
    33  	return present
    34  }
    35  
    36  func (bs *ByteSet) ContainsAll(bytes []byte) bool {
    37  	for _, b := range bytes {
    38  		if _, present := bs.bytes[b]; !present {
    39  			return false
    40  		}
    41  	}
    42  
    43  	return true
    44  }