// Copyright 2016 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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// mkpost processes the output of cgo -godefs to
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// modify the generated types. It is used to clean up
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// the syscall API in an architecture specific manner.
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//
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// mkpost is run after cgo -godefs by mkall.sh.
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package main
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import (
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"fmt"
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"go/format"
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"io/ioutil"
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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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func main() {
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b, err := ioutil.ReadAll(os.Stdin)
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if err != nil {
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log.Fatal(err)
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}
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s := string(b)
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goarch := os.Getenv("GOARCH")
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goos := os.Getenv("GOOS")
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switch {
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case goarch == "s390x" && goos == "linux":
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// Export the types of PtraceRegs fields.
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re := regexp.MustCompile("ptrace(Psw|Fpregs|Per)")
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s = re.ReplaceAllString(s, "Ptrace$1")
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// Replace padding fields inserted by cgo with blank identifiers.
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re = regexp.MustCompile("Pad_cgo[A-Za-z0-9_]*")
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s = re.ReplaceAllString(s, "_")
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// We want to keep X__val in Fsid. Hide it and restore it later.
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s = strings.Replace(s, "X__val", "MKPOSTFSIDVAL", 1)
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// Replace other unwanted fields with blank identifiers.
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re = regexp.MustCompile("X_[A-Za-z0-9_]*")
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s = re.ReplaceAllString(s, "_")
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// Restore X__val in Fsid.
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s = strings.Replace(s, "MKPOSTFSIDVAL", "X__val", 1)
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// Force the type of RawSockaddr.Data to [14]int8 to match
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// the existing gccgo API.
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re = regexp.MustCompile("(Data\\s+\\[14\\])uint8")
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s = re.ReplaceAllString(s, "${1}int8")
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case goos == "freebsd":
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// Keep pre-FreeBSD 10 / non-POSIX 2008 names for timespec fields
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re := regexp.MustCompile("(A|M|C|Birth)tim\\s+Timespec")
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s = re.ReplaceAllString(s, "${1}timespec Timespec")
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}
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// gofmt
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b, err = format.Source([]byte(s))
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if err != nil {
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log.Fatal(err)
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}
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// Append this command to the header to show where the new file
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// came from.
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re := regexp.MustCompile("(cgo -godefs [a-zA-Z0-9_]+\\.go.*)")
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s = re.ReplaceAllString(string(b), "$1 | go run mkpost.go")
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fmt.Print(s)
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}
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