chen3feng
Consider wrap string16 class
Consider support string16
// WHAT: // A version of std::basic_string that provides 2-byte characters even when // wchar_t is not implemented as a 2-byte type. You can access this class as // string16. We also define char16, which string16 is based upon. // // WHY: // On Windows, wchar_t is 2 bytes, and it can conveniently handle UTF-16/UCS-2 // data. Plenty of existing code operates on strings encoded as UTF-16. // // On many other platforms, sizeof(wchar_t) is 4 bytes by default. We can make // it 2 bytes by using the GCC flag -fshort-wchar. But then std::wstring fails // at run time, because it calls some functions (like wcslen) that come from // the system's native C library -- which was built with a 4-byte wchar_t! // It's wasteful to use 4-byte wchar_t strings to carry UTF-16 data, and it's // entirely improper on those systems where the encoding of wchar_t is defined // as UTF-32. // // Here, we define string16, which is similar to std::wstring but replaces all // libc functions with custom, 2-byte-char compatible routines. It is capable // of carrying UTF-16-encoded data.
