PIIODevice::bytesAvailible()

fix pistringlist pibinarystream write
pibinarystream::binaryStreamSize()
PIByteArray pibinarystream read with more size fix
pistring pibinarystream read optimization
fix bug in PIIOBinaryStream read and write if failed
workaround in PIIOString::readDevice
PISPI readDevice bug Fixed

libs/main/io_devices/pitransparentdevice.cpp

@@ -49,6 +49,15 @@ PITransparentDevice::~PITransparentDevice() {
 }
 
 
+ssize_t PITransparentDevice::bytesAvailible() const {
+	ssize_t ret = 0;
+	que_mutex.lock();
+	if (que.isNotEmpty()) ret = que.back().size();
+	que_mutex.unlock();
+	return ret;
+}
+
+
 int PITransparentDevice::readDevice(void * read_to, int max_size) {
 	if (!canRead()) return -1;
 	que_mutex.lock();