130 lines
2.7 KiB
Go
130 lines
2.7 KiB
Go
/*
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* Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
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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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*/
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package nm
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import (
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"bufio"
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"os"
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"strings"
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)
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// MatchedItem represents a matched item
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type MatchedItem struct {
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ObjFile string
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Symbol string
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Type SymbolType
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}
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// MatchedFile represents a matched file
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type MatchedFile struct {
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ArFile string
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Items []*MatchedItem
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}
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// Query queries symbol in index files (allow wildcard).
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func Query(dir string, query string) (files []*MatchedFile, err error) {
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fis, err := os.ReadDir(dir)
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if err != nil {
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return
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}
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dir += "/"
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for _, fi := range fis {
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if fi.IsDir() {
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continue
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}
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idxFile := fi.Name()
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if !strings.HasSuffix(idxFile, ".pub") {
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continue
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}
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files = queryIndex(files, dir+fi.Name(), query)
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}
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return
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}
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func queryIndex(files []*MatchedFile, idxFile, query string) []*MatchedFile {
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f, err := os.Open(idxFile)
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if err != nil {
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return files
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}
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defer f.Close()
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r := bufio.NewReader(f)
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line, err := r.ReadString('\n')
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if err != nil || !strings.HasPrefix(line, "nm ") {
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return files
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}
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var items []*MatchedItem
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arFile := line[3 : len(line)-1]
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objFile := ""
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query, flags := parseQuery(query)
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for {
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line, err = r.ReadString('\n')
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if err != nil {
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break
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}
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if strings.HasPrefix(line, "file ") {
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objFile = line[5 : len(line)-1]
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continue
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}
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typ := line[0]
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sym := line[2 : len(line)-1]
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if !match(sym, query, flags) {
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continue
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}
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items = append(items, &MatchedItem{
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ObjFile: objFile,
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Symbol: sym,
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Type: SymbolType(typ),
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})
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}
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if len(items) > 0 {
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files = append(files, &MatchedFile{ArFile: arFile, Items: items})
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}
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return files
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}
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const (
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flagSuffix = 1 << iota
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flagPrefix
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)
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func parseQuery(query string) (text string, flags int) {
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if strings.HasSuffix(query, "*") {
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query = query[:len(query)-1]
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flags = flagPrefix
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}
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if strings.HasPrefix(query, "*") {
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query = query[1:]
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flags |= flagSuffix
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}
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text = query
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return
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}
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func match(s, query string, flags int) bool {
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switch flags {
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case 0:
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return s == query
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case flagPrefix:
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return strings.HasPrefix(s, query)
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case flagSuffix:
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return strings.HasSuffix(s, query)
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default:
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return strings.Contains(s, query)
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}
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}
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