diff options
| -rw-r--r-- | indra/llcommon/llstring.cpp | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/indra/llcommon/llstring.cpp b/indra/llcommon/llstring.cpp index 852a57af85..671b0a108c 100644 --- a/indra/llcommon/llstring.cpp +++ b/indra/llcommon/llstring.cpp @@ -672,16 +672,23 @@ std::string ll_convert_wide_to_string(const wchar_t* in, unsigned int code_page) wchar_t* ll_convert_string_to_wide(const std::string& in, unsigned int code_page) { - int output_str_len = MultiByteToWideChar(code_page, 0, in.c_str(), in.length(), NULL, 0); + // From review: + // We can preallocate a wide char buffer that is the same length (in wchar_t elements) as the utf8 input,
+ // plus one for a null terminator, and be guaranteed to not overflow.
+
+ // Normally, I'd call that sort of thing premature optimization, + // but we *are* seeing string operations taking a bunch of time, especially when constructing widgets. +// int output_str_len = MultiByteToWideChar(code_page, 0, in.c_str(), in.length(), NULL, 0); // reserve place to NULL terminator + int output_str_len = in.length(); wchar_t* w_out = new wchar_t[output_str_len + 1]; memset(w_out, 0, output_str_len + 1); - MultiByteToWideChar (code_page, 0, in.c_str(), in.length(), w_out, output_str_len); + int real_output_str_len = MultiByteToWideChar (code_page, 0, in.c_str(), in.length(), w_out, output_str_len); //looks like MultiByteToWideChar didn't add null terminator to converted string, see EXT-4858. - w_out[output_str_len] = 0; + w_out[real_output_str_len] = 0; return w_out; } |