1 files changed, 100 insertions, 0 deletions

diff --git a/code/Packet.cpp b/code/Packet.cpp
new file mode 100644
index 0000000..695e371
--- /dev/null
+++ b/code/Packet.cpp
@@ -0,0 +1,100 @@
+#include "Packet.hpp"
+
+Packet::Packet(int id) {
+    Field fLen;
+    fLen.SetVarInt(0);
+    m_fields.push_back(fLen);
+    Field fId;
+    fId.SetVarInt(id);
+    m_fields.push_back(fId);
+}
+
+Packet Packet::operator=(Packet other) {
+    other.swap(*this);
+    return *this;
+}
+
+void Packet::swap(Packet &other) {
+    std::swap(m_fields, other.m_fields);
+    std::swap(m_data, other.m_data);
+    std::swap(m_parsePtr, other.m_parsePtr);
+    std::swap(m_dataLength, other.m_dataLength);
+}
+
+void Packet::CopyToBuff(byte *ptr) {
+    m_fields[0].SetVarInt(GetLength() - m_fields[0].GetLength());
+    for (int i = 0; i < m_fields.size(); i++) {
+        m_fields[i].CopyToBuff(ptr);
+        ptr += m_fields[i].GetLength();
+    }
+}
+
+void Packet::ParseField(FieldType type, size_t len) {
+    if (type == ByteArray && len == 0)
+        throw 118;
+    Field f = FieldParser::Parse(type, m_parsePtr, len);
+    m_fields.push_back(f);
+    m_parsePtr += f.GetLength();
+    if (m_parsePtr == m_data + m_dataLength) {
+        delete[] m_data;
+        m_data = nullptr;
+        m_dataLength = 0;
+        m_parsePtr = nullptr;
+    }
+}
+
+Packet::Packet(byte *data) {
+    Field fLen = FieldParser::Parse(VarInt, data);
+    data += fLen.GetLength();
+    Field fId = FieldParser::Parse(VarInt, data);
+    data += fId.GetLength();
+    m_dataLength = fLen.GetVarInt() - fId.GetLength();
+    m_data = new byte[m_dataLength];
+    std::copy(data,data+m_dataLength,m_data);
+    m_parsePtr = m_data;
+    m_fields.push_back(fLen);
+    m_fields.push_back(fId);
+}
+
+Field &Packet::GetField(int id) {
+    if (id < -2 || id >= m_fields.size() - 2)
+        throw 111;
+    return m_fields[id + 2];
+}
+
+size_t Packet::GetLength() {
+    size_t len = 0;
+    for (int i = 0; i < m_fields.size(); i++)
+        len += m_fields[i].GetLength();
+    return len + m_dataLength;
+}
+
+void Packet::AddField(Field field) {
+    m_fields.push_back(field);
+}
+
+int Packet::GetId() {
+    return m_fields[1].GetVarInt();
+}
+
+Packet::Packet(const Packet &other) {
+    if (other.m_dataLength > 0) {
+        m_dataLength = other.m_dataLength;
+        m_data = new byte[m_dataLength];
+        m_parsePtr = m_data + (other.m_data - other.m_parsePtr);
+        std::copy(other.m_data, other.m_data + m_dataLength, m_data);
+    }
+    m_fields = other.m_fields;
+}
+
+void Packet::ParseFieldArray(Field &field, FieldType type, size_t len) {
+    Field f = FieldParser::Parse(type, m_parsePtr, len);
+    field.Attach(f);
+    m_parsePtr += f.GetLength();
+    if (m_parsePtr == m_data + m_dataLength) {
+        delete[] m_data;
+        m_data = nullptr;
+        m_dataLength = 0;
+        m_parsePtr = nullptr;
+    }
+}