diff options
Diffstat (limited to '')
-rw-r--r-- | src/cmd/internal/obj/stringer.go | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/cmd/internal/obj/stringer.go b/src/cmd/internal/obj/stringer.go new file mode 100644 index 0000000..a4d507d --- /dev/null +++ b/src/cmd/internal/obj/stringer.go @@ -0,0 +1,104 @@ +// 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{ +` |