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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build ignore
// +build ignore
// This is a mini version of the stringer tool customized for the Anames table
// in the architecture support for obj.
// This version just generates the slice of strings, not the String method.
package main
import (
"bufio"
"flag"
"fmt"
"log"
"os"
"regexp"
"strings"
)
var (
input = flag.String("i", "", "input file name")
output = flag.String("o", "", "output file name")
pkg = flag.String("p", "", "package name")
)
var Are = regexp.MustCompile(`^\tA([A-Za-z0-9]+)`)
func main() {
flag.Parse()
if *input == "" || *output == "" || *pkg == "" {
flag.Usage()
os.Exit(2)
}
in, err := os.Open(*input)
if err != nil {
log.Fatal(err)
}
fd, err := os.Create(*output)
if err != nil {
log.Fatal(err)
}
out := bufio.NewWriter(fd)
defer out.Flush()
var on = false
s := bufio.NewScanner(in)
first := true
for s.Scan() {
line := s.Text()
if !on {
// First relevant line contains "= obj.ABase".
// If we find it, delete the = so we don't stop immediately.
const prefix = "= obj.ABase"
index := strings.Index(line, prefix)
if index < 0 {
continue
}
// It's on. Start with the header.
fmt.Fprintf(out, header, *input, *output, *pkg, *pkg)
on = true
line = line[:index]
}
// Strip comments so their text won't defeat our heuristic.
index := strings.Index(line, "//")
if index > 0 {
line = line[:index]
}
index = strings.Index(line, "/*")
if index > 0 {
line = line[:index]
}
// Termination condition: Any line with an = changes the sequence,
// so stop there, and stop at a closing brace.
if strings.HasPrefix(line, "}") || strings.ContainsRune(line, '=') {
break
}
sub := Are.FindStringSubmatch(line)
if len(sub) < 2 {
continue
}
if first {
fmt.Fprintf(out, "\tobj.A_ARCHSPECIFIC: %q,\n", sub[1])
first = false
} else {
fmt.Fprintf(out, "\t%q,\n", sub[1])
}
}
fmt.Fprintln(out, "}")
if s.Err() != nil {
log.Fatal(err)
}
}
const header = `// Code generated by stringer -i %s -o %s -p %s; DO NOT EDIT.
package %s
import "cmd/internal/obj"
var Anames = []string{
`
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