1 /* 2 * Copyright © 2017-2018 Aeneas Rekkas <aeneas+oss@aeneas.io> 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 * 16 * @author Aeneas Rekkas <aeneas+oss@aeneas.io> 17 * @copyright 2017-2018 Aeneas Rekkas <aeneas+oss@aeneas.io> 18 * @license Apache-2.0 19 */ 20 21 // Package pagination provides helpers for dealing with pagination. 22 package pagination 23 24 // Index uses limit, offset, and a slice's length to compute start and end indices for said slice. 25 func Index(limit, offset, length int) (start, end int) { 26 if offset > length { 27 return length, length 28 } else if limit+offset > length { 29 return offset, length 30 } 31 32 return offset, offset + limit 33 } 34