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package helper
import (
"bytes"
"io"
"syscall"
)
type argsWt [][]byte
func (a argsWt) WriteTo(w io.Writer) (int64, error) {
nt := 0
for _, arg := range a {
n, err := w.Write(arg)
nt += n
if err != nil {
return int64(nt), err
}
}
return int64(nt), nil
}
func (a argsWt) String() string {
return string(
bytes.TrimSuffix(
bytes.ReplaceAll(
bytes.Join(a, nil),
[]byte{0}, []byte{' '},
),
[]byte{' '},
),
)
}
// NewCheckedArgs returns a checked null-terminated argument writer for a copy of args.
func NewCheckedArgs(args ...string) (wt io.WriterTo, err error) {
a := make(argsWt, len(args))
for i, arg := range args {
a[i], err = syscall.ByteSliceFromString(arg)
if err != nil {
return
}
}
wt = a
return
}
// MustNewCheckedArgs returns a checked null-terminated argument writer for a copy of args.
// If s contains a NUL byte this function panics instead of returning an error.
func MustNewCheckedArgs(args ...string) io.WriterTo {
a, err := NewCheckedArgs(args...)
if err != nil {
panic(err.Error())
}
return a
}
|
