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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.
package ld
import (
"cmd/link/internal/loader"
"encoding/binary"
"fmt"
"os"
)
var atExitFuncs []func()
func AtExit(f func()) {
atExitFuncs = append(atExitFuncs, f)
}
// runAtExitFuncs runs the queued set of AtExit functions.
func runAtExitFuncs() {
for i := len(atExitFuncs) - 1; i >= 0; i-- {
atExitFuncs[i]()
}
atExitFuncs = nil
}
// Exit exits with code after executing all atExitFuncs.
func Exit(code int) {
runAtExitFuncs()
os.Exit(code)
}
// Exitf logs an error message then calls Exit(2).
func Exitf(format string, a ...interface{}) {
fmt.Fprintf(os.Stderr, os.Args[0]+": "+format+"\n", a...)
nerrors++
Exit(2)
}
// afterErrorAction updates 'nerrors' on error and invokes exit or
// panics in the proper circumstances.
func afterErrorAction() {
nerrors++
if *flagH {
panic("error")
}
if nerrors > 20 {
Exitf("too many errors")
}
}
// Errorf logs an error message.
//
// If more than 20 errors have been printed, exit with an error.
//
// Logging an error means that on exit cmd/link will delete any
// output file and return a non-zero error code.
//
// TODO: remove. Use ctxt.Errorf instead.
// All remaining calls use nil as first arg.
func Errorf(dummy *int, format string, args ...interface{}) {
format += "\n"
fmt.Fprintf(os.Stderr, format, args...)
afterErrorAction()
}
// Errorf method logs an error message.
//
// If more than 20 errors have been printed, exit with an error.
//
// Logging an error means that on exit cmd/link will delete any
// output file and return a non-zero error code.
func (ctxt *Link) Errorf(s loader.Sym, format string, args ...interface{}) {
if ctxt.loader != nil {
ctxt.loader.Errorf(s, format, args...)
return
}
// Note: this is not expected to happen very often.
format = fmt.Sprintf("sym %d: %s", s, format)
format += "\n"
fmt.Fprintf(os.Stderr, format, args...)
afterErrorAction()
}
func artrim(x []byte) string {
i := 0
j := len(x)
for i < len(x) && x[i] == ' ' {
i++
}
for j > i && x[j-1] == ' ' {
j--
}
return string(x[i:j])
}
func stringtouint32(x []uint32, s string) {
for i := 0; len(s) > 0; i++ {
var buf [4]byte
s = s[copy(buf[:], s):]
x[i] = binary.LittleEndian.Uint32(buf[:])
}
}
// contains reports whether v is in s.
func contains(s []string, v string) bool {
for _, x := range s {
if x == v {
return true
}
}
return false
}
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