diff options
Diffstat (limited to 'lib/output.js')
| -rw-r--r-- | lib/output.js | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/lib/output.js b/lib/output.js index cc39c2df..38b4f8bc 100644 --- a/lib/output.js +++ b/lib/output.js @@ -119,15 +119,20 @@ function OutputStream(options) { }); } : function(str) { var s = ""; - for (var i = 0; i < str.length; i++) { - if (is_surrogate_pair_head(str[i]) && !is_surrogate_pair_tail(str[i + 1]) - || is_surrogate_pair_tail(str[i]) && !is_surrogate_pair_head(str[i - 1])) { - s += "\\u" + str.charCodeAt(i).toString(16); - } else { - s += str[i]; + for (var i = 0, j = 0; i < str.length; i++) { + var code = str.charCodeAt(i); + if (is_surrogate_pair_head(code)) { + if (is_surrogate_pair_tail(str.charCodeAt(i + 1))) { + i++; + continue; + } + } else if (!is_surrogate_pair_tail(code)) { + continue; } + s += str.slice(j, i) + "\\u" + code.toString(16); + j = i + 1; } - return s; + return j == 0 ? str : s + str.slice(j); }; function make_string(str, quote) { |