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Use a string builder instead of appending to a slice

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This commit is contained in:
Kovid Goyal 2022-11-10 20:41:35 +05:30
parent 87b4800fdf
commit eae4899df4
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 16 additions and 16 deletions
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32
tools/utils/shlex/shlex.go
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@ -202,11 +202,11 @@ var ErrUnclosedSingleQuote error = errors.New("EOF found when expecting closing
func (t *Tokenizer) scanStream() (*Token, error) {
state := startState
var tokenType TokenType
var value []rune
var nextRune rune
var nextRuneType runeTokenClass
var err error
var sz int
value := strings.Builder{}
unread_rune := func() {
t.redo_rune.sz = sz
@ -244,7 +244,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
case spaceRuneClass:
{
tokenType = SpaceToken
value = append(value, nextRune)
value.WriteRune(nextRune)
state = inSpaceState
}
case escapingQuoteRuneClass:
@ -265,7 +265,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
default:
{
tokenType = WordToken
value = append(value, nextRune)
value.WriteRune(nextRune)
state = inWordState
}
}
@ -275,13 +275,13 @@ func (t *Tokenizer) scanStream() (*Token, error) {
switch nextRuneType {
case spaceRuneClass:
{
value = append(value, nextRune)
value.WriteRune(nextRune)
}
default:
{
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
unread_rune()
return token, err
}
@ -294,14 +294,14 @@ func (t *Tokenizer) scanStream() (*Token, error) {
{
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
return token, err
}
case spaceRuneClass:
{
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
unread_rune()
return token, err
}
@ -319,7 +319,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
}
default:
{
value = append(value, nextRune)
value.WriteRune(nextRune)
}
}
}
@ -331,13 +331,13 @@ func (t *Tokenizer) scanStream() (*Token, error) {
err = ErrTrailingEscape
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
return token, err
}
default:
{
state = inWordState
value = append(value, nextRune)
value.WriteRune(nextRune)
}
}
}
@ -349,13 +349,13 @@ func (t *Tokenizer) scanStream() (*Token, error) {
err = ErrTrailingQuoteEscape
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
return token, err
}
default:
{
state = quotingEscapingState
value = append(value, nextRune)
value.WriteRune(nextRune)
}
}
}
@ -367,7 +367,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
err = ErrUnclosedDoubleQuote
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
return token, err
}
case escapingQuoteRuneClass:
@ -380,7 +380,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
}
default:
{
value = append(value, nextRune)
value.WriteRune(nextRune)
}
}
}
@ -392,7 +392,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
err = ErrUnclosedSingleQuote
token := &Token{
tokenType: tokenType,
value: string(value)}
value: value.String()}
return token, err
}
case nonEscapingQuoteRuneClass:
@ -401,7 +401,7 @@ func (t *Tokenizer) scanStream() (*Token, error) {
}
default:
{
value = append(value, nextRune)
value.WriteRune(nextRune)
}
}
}