How to convert a unicode string to its unicode escapes?

问题:

here)?

回答1:

Note this loops over UTF-16 code units, not actual code points.

回答2:

I assume you're doing code-generation (of JavaScript, maybe?)

QString is like a collection of QChar. Loop through the contents, and on each QChar call the unicode method to get the ushort (16-bit integer) value.

Then format each character like "\\u%04X", i.e. \u followed by the 4-digit hex value.

NB. You may need to swap the two bytes (the two hex characters) to get the right result depending on the platform you're running on.

回答3:

wchar_t *input; wstring output;   for (int i=0; i<str_len; i++) {   wchar_t code[7];   swprintf(code, 7, L"\\u%0.4X",input[i]);   output += code; } 

回答4:

I have solved the problem with this code:

EDITED TO A BETTER VERSION: (I just do not want to convert Latin symbols to Unicode, because it will consume additional space without and advantage for my problem (want to remind that I want to generate Unicode RTF)).

Thanks to @Daniel Earwicker for the algorithm and of course +1.

BTW you need to specify UTF-8 for text editor encoding.

回答5:

Hope it helps.

回答6:

My solution:

std::wstring output; QString result;  QTextCodec::setCodecForLocale ( QTextCodec::codecForName ( "UTF-8" ) );  for( uint i = 0; wcslen( input ) > i; ++i ) {     if( isascii( input[ i ] ) )     {         output.reserve( output.size() + 1 );         output += input[ i ];     } else {         wchar_t code[ 7 ];         swprintf( code, 7, L"\\u%0.4X", input[ i ] );         output.reserve( output.size() + 7 ); // "\u"(2) + 5(uint max digits capacity)         output += code;     } }  result.reserve( output.size() ); result.append( QString::fromStdWString( output ) ); 

Works with Russian correct. Transforms

hello привет 

into

hello \\u043F\\u0440\\u0438\\u0432\\u0435\\u0442 

文章来源: How to convert a unicode string to its unicode escapes?