Function parseSedSubstituteFlags

tools/bash/sed_validation.go:189–218

(expr string)

}

func parseSedSubstituteFlags(expr string) (string, bool) {
	if len(expr) < 4 || expr[0] != 's' {
		return "", false
	}
	delimiter := expr[1]
	if (delimiter >= 'a' && delimiter <= 'z') || (delimiter >= 'A' && delimiter <= 'Z') ||
		(delimiter >= '0' && delimiter <= '9') || delimiter == ' ' || delimiter == '\t' || delimiter == '\n' || delimiter == '\r' {
		return "", false
	}
	parts := 0
	escaped := false
	for i := 2; i < len(expr); i++ {
		ch := expr[i]
		if escaped {
			escaped = false
			continue
		}
		if ch == '\\' {
			escaped = true
			continue
		}
		if ch == delimiter {
			parts++
			if parts == 3 {
				return expr[i+1:], true
			}
		}
	}
	return "", false
}