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Support ANSI sequences with mixed ; and : delimiters (#4169)

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`make bench` shows no loss of performance.
This commit is contained in:
Junegunn Choi
2025-01-10 17:43:13 +09:00
parent cc1d9f124e
commit 14ef8e8051
2 changed files with 10 additions and 16 deletions
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24
src/ansi.go
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@@ -310,20 +310,15 @@ func extractColor(str string, state *ansiState, proc func(string, *ansiState) bo
return trimmed, nil, state
}
func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
func parseAnsiCode(s string) (int, string) {
var remaining string
var i int
if delimiter == 0 {
// Faster than strings.IndexAny(";:")
i = strings.IndexByte(s, ';')
if i < 0 {
i = strings.IndexByte(s, ':')
}
} else {
i = strings.IndexByte(s, delimiter)
// Faster than strings.IndexAny(";:")
i = strings.IndexByte(s, ';')
if i < 0 {
i = strings.IndexByte(s, ':')
}
if i >= 0 {
delimiter = s[i]
remaining = s[i+1:]
s = s[:i]
}
@@ -335,14 +330,14 @@ func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
for _, ch := range stringBytes(s) {
ch -= '0'
if ch > 9 {
return -1, delimiter, remaining
return -1, remaining
}
code = code*10 + int(ch)
}
return code, delimiter, remaining
return code, remaining
}
return -1, delimiter, remaining
return -1, remaining
}
func interpretCode(ansiCode string, prevState *ansiState) ansiState {
@@ -378,11 +373,10 @@ func interpretCode(ansiCode string, prevState *ansiState) ansiState {
state256 := 0
ptr := &state.fg
var delimiter byte
count := 0
for len(ansiCode) != 0 {
var num int
if num, delimiter, ansiCode = parseAnsiCode(ansiCode, delimiter); num != -1 {
if num, ansiCode = parseAnsiCode(ansiCode); num != -1 {
count++
switch state256 {
case 0: