String::view - how to convert to wchar_t

Hello friends of coherence,.
I would like to know, how can I convert String::View wchar_t in C++
I need to transfer the result of consistency to xqilla/xerces parser that works with XMLCh * which is of type const wchar_t *.

If I have:

String::view mystringview

obtained from the deserialized object of POF

How can I convert to type wchar_t variable please?

I'm quite lost...

I use coh 3.6.1.

Thank you
Jan

Hi Jan,

The easiest thing would be to convert a std::wstring first and then access its array of wchar_t. The chain of consistency supports the direct assignment from std::string and std::wstring.

size32_t cch = mystringview->length(); // character count
size_t cb = sizeof(XMLCh + 1) * cch; // byte count
XMLCh* xstr = (XMLCh*) malloc(cb);

std::wstring wstr = mystringview; // converts UTF-8 to wchar_t and inserts content into wstring
memcpy(xstr, wstr.data(), cb);

It was however to make at least an intermediate copy of the data. A more effective solution would be to browse the contents of the string to extract a wchar_t both. Internally, the string is stored in UTF-8 format and direct way in wchar_t format memcpy is not feasible. Here is the iterative approach.

size32_t cch = mystringview->length(); // character count
size_t cb = sizeof(XMLCh + 1) * cch; // byte count
XMLCh* xstr = (XMLCh*) malloc(cb);

const char* iter = mystringview->getCString(); // obtain raw access to UTF-8 array
for (size_t i = 0; i < cch; ++i)
    {
    xstr[i] = String::next(iter); // decodes the next wchar_t from the UTF-8 array, and increments iter accordingly
    }
xstr[i] = 0;

Thank you

Mark
The Oracle coherence

Tags: Fusion Middleware

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