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#include "CommandParser.h"
#include <QIODevice>
CommandParser::CommandParser(QIODevice *device, QObject *parent) :
QObject(parent) {
m_device = device;
m_expectingDataSize = -1;
connect(m_device, SIGNAL(readyRead()), this, SLOT(checkNext()));
}
void CommandParser::checkNext() {
if (m_expectingDataSize == -1) {
if (m_device->canReadLine()) {
readLine();
checkNext();
}
} else {
if (m_device->bytesAvailable() >= m_expectingDataSize) {
readDataBlock();
checkNext();
}
}
}
void CommandParser::readLine() {
char buffer[128];
qint64 lineLength = m_device->readLine(buffer, 128);
if (lineLength != -1) {
buffer[lineLength - 1] = 0;
processNext(buffer);
}
}
void CommandParser::readDataBlock() {
char *buffer = new char[m_expectingDataSize + 1];
m_device->read(buffer, m_expectingDataSize);
buffer[m_expectingDataSize] = 0;
processNext(buffer);
m_expectingDataSize = -1;
delete[] buffer;
}
void CommandParser::processNext(const char *data) {
if (m_commandName.isNull()) {
m_commandName = data;
m_argumentsExpected = -1;
} else {
processArgument(data);
}
}
void CommandParser::processArgument(const char *data) {
if (m_argumentsExpected == -1) {
m_argumentsExpected = QString(data).toInt();
} else if (m_expectingDataSize == -1) {
m_expectingDataSize = QString(data).toInt();
} else {
m_arguments.append(QString::fromUtf8(data));
}
if (m_arguments.length() == m_argumentsExpected) {
emit commandReady(m_commandName, m_arguments);
m_commandName = QString();
m_arguments.clear();
m_argumentsExpected = -1;
}
}
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