shortnames.go

     1  // Copyright 2022 Google Inc. All Rights Reserved.
     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 report
    16  
    17  import (
    18  	"regexp"
    19  
    20  	"github.com/google/pprof/internal/graph"
    21  )
    22  
    23  var sepRE = regexp.MustCompile(`::|\.`)
    24  
    25  // shortNameList returns a non-empty sequence of shortened names
    26  // (in decreasing preference) that can be used to represent name.
    27  func shortNameList(name string) []string {
    28  	name = graph.ShortenFunctionName(name)
    29  	seps := sepRE.FindAllStringIndex(name, -1)
    30  	result := make([]string, 0, len(seps)+1)
    31  	result = append(result, name)
    32  	for _, sep := range seps {
    33  		// Suffix starting just after sep
    34  		if sep[1] < len(name) {
    35  			result = append(result, name[sep[1]:])
    36  		}
    37  	}
    38  	return result
    39  }
    40
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