自学教程：C++ to_utf8函数代码示例

void GuiClipboard::put(string const & lyx, docstring const & html, docstring const & text){	LYXERR(Debug::ACTION, "GuiClipboard::put(`" << lyx << "' `"			      << to_utf8(html) << "' `" << to_utf8(text) << "')");	// We don't convert the encoding of lyx since the encoding of the	// clipboard contents is specified in the data itself	QMimeData * data = new QMimeData;	if (!lyx.empty()) {		QByteArray const qlyx(lyx.c_str(), lyx.size());		data->setData(lyxMimeType(), qlyx);		// If the OS has not the concept of clipboard ownership,		// we recognize internal data through its checksum.		if (!hasInternal()) {			boost::crc_32_type crc32;			crc32.process_bytes(lyx.c_str(), lyx.size());			checksum = crc32.checksum();		}	}	// Don't test for text.empty() since we want to be able to clear the	// clipboard.	QString const qtext = toqstr(text);	data->setText(qtext);	QString const qhtml = toqstr(html);	data->setHtml(qhtml);	qApp->clipboard()->setMimeData(data, QClipboard::Clipboard);}

docstring InsetListings::getCaption(OutputParams const & runparams) const{	if (paragraphs().empty())		return docstring();	InsetCaption const * ins = getCaptionInset();	if (ins == 0)		return docstring();	TexRow texrow;	odocstringstream ods;	otexstream os(ods, texrow);	ins->getOptArg(os, runparams);	ins->getArgument(os, runparams);	// the caption may contain /label{} but the listings	// package prefer caption={}, label={}	docstring cap = ods.str();	if (!contains(to_utf8(cap), "//label{"))		return cap;	// convert from	//     blah1/label{blah2} blah3	// to	//     blah1 blah3},label={blah2	// to form options	//     caption={blah1 blah3},label={blah2}	//	// NOTE that } is not allowed in blah2.	regex const reg("(.*)////label//{(.*?)//}(.*)");	string const new_cap("//1//3},label={//2");	return from_utf8(regex_replace(to_utf8(cap), reg, new_cap));}

 ChatClient(void *epoll, void *raddr, int raddrlen) : epoll(epoll) {     /*     	Construct a std::string representation of our     	remote address. The actual 32 bit address in a     	sockaddr_in structure is located at +4, and the     	big endian port number is at +2. Since we don't     	want our compiler complaining about pointer math     	we case it to an unsigned char *     */     unsigned char *r = (unsigned char *)raddr;     void *ht_addrstr = inet_ntoa(*(unsigned *)(r+4));     /*     	Next up, we need the port number, but since it is     	in big endian order, we can extract the bytes directly.     */     int port = (r[2] << 8) + r[3];     /*     	Convert that to a string with the HeavyThing string     	library... of course we could use snprintf, etc     	but we are mixing it up on purpose here.     */     void *ht_portstr = string$from_unsigned(port, 10);     /*     	Now we can construct our char * of the above     */     char scratch[32];     int i = string$to_utf8(ht_addrstr, scratch);     scratch[i] = ':';     int j = string$to_utf8(ht_portstr, &scratch[i+1]);     scratch[i+j+1] = 0;     remote_address = std::string(scratch, i+j+1); }

FileFilterList::FileFilterList(docstring const & qt_style_filter){	// FIXME UNICODE	string const filter = to_utf8(qt_style_filter)		+ (qt_style_filter.empty() ? string() : ";;")		+ to_utf8(_("All Files "))#if defined(_WIN32)				+ ("(*.*)");#else		+ ("(*)");#endif	// Split data such as "TeX documents (*.tex);;LyX Documents (*.lyx)"	// into individual filters.	static lyx::regex const separator_re(";;");	string::const_iterator it = filter.begin();	string::const_iterator const end = filter.end();	while (true) {		match_results<string::const_iterator> what;		if (!lyx::regex_search(it, end, what, separator_re)) {			parse_filter(string(it, end));			break;		}		// Everything from the start of the input to		// the start of the match.		parse_filter(string(what[-1].first, what[-1].second));		// Increment the iterator to the end of the match.		it += distance(it, what[0].second);	}}

void InsetRef::validate(LaTeXFeatures & features) const{	string const cmd = getCmdName();	if (cmd == "vref" || cmd == "vpageref")		features.require("varioref");	else if (cmd == "formatted") {		docstring const data = getEscapedLabel(features.runparams());		docstring label;		docstring prefix;		string const fcmd = to_utf8(getFormattedCmd(data, label, prefix));		if (buffer().params().use_refstyle) {			features.require("refstyle");			if (prefix == "cha")				features.addPreambleSnippet("//let//charef=//chapref");			else if (!prefix.empty()) {				string lcmd = "//AtBeginDocument{//providecommand" + 						fcmd + "[1]{//ref{" + to_utf8(prefix) + ":#1}}}";				features.addPreambleSnippet(lcmd);			}		} else {			features.require("prettyref");			// prettyref uses "cha" for chapters, so we provide a kind of			// translation.			if (prefix == "chap")				features.addPreambleSnippet("//let//[email
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