C++ wxMBConv::cMB2WC方法代码示例

void FileTestCase::DoRoundTripTest(const wxMBConv& conv)
{
    TestFile tf;

    const wxString data = "Hello\0UTF";

    {
        wxFile fout(tf.GetName(), wxFile::write);
        CPPUNIT_ASSERT( fout.IsOpened() );

        CPPUNIT_ASSERT( fout.Write(data, conv) );
    }

    {
        wxFile fin(tf.GetName(), wxFile::read);
        CPPUNIT_ASSERT( fin.IsOpened() );

        const ssize_t len = fin.Length();
        wxCharBuffer buf(len);
        CPPUNIT_ASSERT_EQUAL( len, fin.Read(buf.data(), len) );

        wxWCharBuffer wbuf(conv.cMB2WC(buf));
#if wxUSE_UNICODE
        CPPUNIT_ASSERT_EQUAL( data, wbuf );
#else // !wxUSE_UNICODE
        CPPUNIT_ASSERT
        (
            memcmp(wbuf, L"Hello\0UTF", data.length()*sizeof(wchar_t)) == 0
        );
#endif // wxUSE_UNICODE/!wxUSE_UNICODE
    }
}

    // test that the conversion between str and wcs (subject to flags) succeeds
    //
    // the first argument is the index in the test array and is used solely for
    // diagnostics
    void Test(size_t n, wxMBConv& conv) const
    {
        if ( str )
        {
            wxWCharBuffer wbuf = conv.cMB2WC(str);

            if ( wcs )
            {
                CPPUNIT_ASSERT_MESSAGE
                (
                    Message(n, "MB2WC failed"),
                    wbuf.data()
                );

                CPPUNIT_ASSERT_MESSAGE
                (
                    Message(n, "MB2WC", wbuf, wcs),
                    wxStrcmp(wbuf, wcs) == 0
                );
            }
            else // conversion is supposed to fail
            {
                CPPUNIT_ASSERT_MESSAGE
                (
                    Message(n, "MB2WC succeeded"),
                    !wbuf.data()
                );
            }
        }

        if ( wcs && !(flags & ONLY_MB2WC) )
        {
            wxCharBuffer buf = conv.cWC2MB(wcs);

            if ( str )
            {
                CPPUNIT_ASSERT_MESSAGE
                (
                    Message(n, "WC2MB failed"),
                    buf.data()
                );

                CPPUNIT_ASSERT_MESSAGE
                (
                    Message(n, "WC2MB", buf, str),
                    strcmp(buf, str) == 0
                );
            }
            else
            {
                CPPUNIT_ASSERT_MESSAGE
                (
                    Message(n, "WC2MB succeeded"),
                    !buf.data()
                );
            }
        }
    }

wxString CTextFile::GetNextLine(const wxMBConv& conv)
{
	wxCHECK_MSG(m_file.IsOpened(), wxEmptyString, wxT("Trying to read from closed file."));
	wxCHECK_MSG(!m_file.Eof(), wxEmptyString, wxT("Trying to read past EOF"));
	wxCHECK_MSG((m_mode == read), wxEmptyString, wxT("Trying to read from non-readable file."));


	wxString line;
	char buffer[TXTBUF_SIZE];

	// Loop until EOF (fgets will then return NULL) or a newline is read.
	while (fgets(buffer, TXTBUF_SIZE, m_file.fp())) {
		// NB: The majority of the time spent by this function is
		//     spent converting the multibyte string to wide-char.
		line += conv.cMB2WC(buffer);

		// Remove any newlines, carriage returns, etc.
		if (line.Length() && (line.Last() == wxT('\n'))) {
			if ((line.Length() > 1)) {
				if (line[line.Length() - 2] == wxT('\r')) {
					// Carriage return + newline
					line.RemoveLast(2);
				} else {
					// Only a newline.
					line.RemoveLast(1);					
				}
			} else {
				// Empty line
				line.Clear();
			}

			// We've read an entire line.
			break;
		}
	}

	return line;
}