+#if wxUSE_UNICODE_WCHAR
+ // the part of the string we have here may be incomplete, i.e. it can stop
+ // in the middle of an UTF-8 character and so converting it would fail; if
+ // this is the case, accumulate the part which we failed to convert until
+ // we get the rest (and also take into account the part which we might have
+ // left unconverted before)
+ const char *src;
+ size_t srcLen;
+ if ( m_unconv.GetDataLen() )
+ {
+ // append the new data to the data remaining since the last time
+ m_unconv.AppendData(p, size);
+ src = m_unconv;
+ srcLen = m_unconv.GetDataLen();
+ }
+ else // no unconverted data left, avoid extra copy
+ {
+ src = p;
+ srcLen = size;
+ }
+
+ size_t wlen;
+ wxWCharBuffer wbuf(m_conv.cMB2WC(src, srcLen, &wlen));
+ if ( wbuf )
+ {
+ // conversion succeeded, clear the unconverted buffer
+ m_unconv = wxMemoryBuffer(0);
+
+ m_str->append(wbuf, wlen);
+ }
+ else // conversion failed
+ {
+ // remember unconverted data if there had been none before (otherwise
+ // we've already got it in the buffer)
+ if ( src == p )
+ m_unconv.AppendData(src, srcLen);
+
+ // pretend that we wrote the data anyhow, otherwise the caller would
+ // believe there was an error and this might not be the case, but do
+ // not update m_pos as m_str hasn't changed
+ return size;
+ }
+#else // !wxUSE_UNICODE_WCHAR
+ // no recoding necessary, the data is supposed to already be in UTF-8 (if
+ // supported) or ASCII otherwise
+ m_str->append(p, size);
+#endif // wxUSE_UNICODE_WCHAR/!wxUSE_UNICODE_WCHAR