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device: simplify UAPI helper methods

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bufio is not required.

strings.Builder is cheaper than bytes.Buffer for constructing strings.

io.Writer is more flexible than io.StringWriter,
and just as cheap (when used with io.WriteString).

Run gofmt.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
This commit is contained in:
Josh Bleecher Snyder 2020-12-22 10:08:25 -08:00 committed by Jason A. Donenfeld
parent 25b01723dd
commit a1c265b0c5
1 changed files with 5 additions and 12 deletions
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17
device/uapi.go
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@ -7,7 +7,6 @@ package device
import (
"bufio"
"bytes"
"errors"
"fmt"
"io"
@ -33,7 +32,7 @@ func (s IPCError) ErrorCode() int64 {
return s.int64
}
func (device *Device) IpcGetOperation(w io.StringWriter) error {
func (device *Device) IpcGetOperation(w io.Writer) error {
lines := make([]string, 0, 100)
send := func(line string) {
lines = append(lines, line)
@ -99,7 +98,7 @@ func (device *Device) IpcGetOperation(w io.StringWriter) error {
// send lines (does not require resource locks)
for _, line := range lines {
_, err := w.WriteString(line + "\n")
_, err := io.WriteString(w, line+"\n")
if err != nil {
return &IPCError{ipc.IpcErrorIO}
}
@ -397,22 +396,16 @@ func (device *Device) IpcSetOperation(r io.Reader) error {
return nil
}
func (device *Device) IpcGet() (string, error) {
buf := new(bytes.Buffer)
writer := bufio.NewWriter(buf)
if err := device.IpcGetOperation(writer); err != nil {
return "", err
}
if err := writer.Flush(); err != nil {
buf := new(strings.Builder)
if err := device.IpcGetOperation(buf); err != nil {
return "", err
}
return buf.String(), nil
}
func (device *Device) IpcSet(uapiConf string) error {
return device.IpcSetOperation(bufio.NewReader(strings.NewReader(uapiConf)))
return device.IpcSetOperation(strings.NewReader(uapiConf))
}
func (device *Device) IpcHandle(socket net.Conn) {