105 lines
2.2 KiB
Go
105 lines
2.2 KiB
Go
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// Copyright 2015 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// +build ignore
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// This is a mini version of the stringer tool customized for the Anames table
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// in the architecture support for obj.
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// This version just generates the slice of strings, not the String method.
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package main
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import (
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"bufio"
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"flag"
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"fmt"
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"log"
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"os"
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"regexp"
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"strings"
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)
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var (
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input = flag.String("i", "", "input file name")
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output = flag.String("o", "", "output file name")
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pkg = flag.String("p", "", "package name")
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)
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var Are = regexp.MustCompile(`^\tA([A-Z0-9]+)`)
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func main() {
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flag.Parse()
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if *input == "" || *output == "" || *pkg == "" {
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flag.Usage()
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os.Exit(2)
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}
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in, err := os.Open(*input)
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if err != nil {
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log.Fatal(err)
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}
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fd, err := os.Create(*output)
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if err != nil {
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log.Fatal(err)
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}
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out := bufio.NewWriter(fd)
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defer out.Flush()
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var on = false
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s := bufio.NewScanner(in)
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first := true
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for s.Scan() {
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line := s.Text()
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if !on {
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// First relevant line contains "= obj.ABase".
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// If we find it, delete the = so we don't stop immediately.
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const prefix = "= obj.ABase"
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index := strings.Index(line, prefix)
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if index < 0 {
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continue
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}
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// It's on. Start with the header.
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fmt.Fprintf(out, header, *input, *output, *pkg, *pkg)
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on = true
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line = line[:index]
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}
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// Strip comments so their text won't defeat our heuristic.
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index := strings.Index(line, "//")
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if index > 0 {
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line = line[:index]
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}
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index = strings.Index(line, "/*")
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if index > 0 {
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line = line[:index]
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}
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// Termination condition: Any line with an = changes the sequence,
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// so stop there, and stop at a closing brace.
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if strings.HasPrefix(line, "}") || strings.ContainsRune(line, '=') {
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break
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}
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sub := Are.FindStringSubmatch(line)
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if len(sub) < 2 {
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continue
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}
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if first {
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fmt.Fprintf(out, "\tobj.A_ARCHSPECIFIC: %q,\n", sub[1])
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first = false
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} else {
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fmt.Fprintf(out, "\t%q,\n", sub[1])
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}
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}
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fmt.Fprintln(out, "}")
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if s.Err() != nil {
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log.Fatal(err)
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}
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}
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const header = `// Generated by stringer -i %s -o %s -p %s
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// Do not edit.
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package %s
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import "github.com/google/gops/internal/obj"
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var Anames = []string{
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`
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