1 files changed, 262 insertions, 0 deletions

diff --git a/src/network/packet.cpp b/src/network/packet.cpp
new file mode 100644
index 000000000..0e22f1eb4
--- /dev/null
+++ b/src/network/packet.cpp
@@ -0,0 +1,262 @@
+// SPDX-FileCopyrightText: Copyright 2017 Citra Emulator Project
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#ifdef _WIN32
+#include <winsock2.h>
+#else
+#include <arpa/inet.h>
+#endif
+#include <cstring>
+#include <string>
+#include "network/packet.h"
+
+namespace Network {
+
+#ifndef htonll
+static u64 htonll(u64 x) {
+    return ((1 == htonl(1)) ? (x) : ((uint64_t)htonl((x)&0xFFFFFFFF) << 32) | htonl((x) >> 32));
+}
+#endif
+
+#ifndef ntohll
+static u64 ntohll(u64 x) {
+    return ((1 == ntohl(1)) ? (x) : ((uint64_t)ntohl((x)&0xFFFFFFFF) << 32) | ntohl((x) >> 32));
+}
+#endif
+
+void Packet::Append(const void* in_data, std::size_t size_in_bytes) {
+    if (in_data && (size_in_bytes > 0)) {
+        std::size_t start = data.size();
+        data.resize(start + size_in_bytes);
+        std::memcpy(&data[start], in_data, size_in_bytes);
+    }
+}
+
+void Packet::Read(void* out_data, std::size_t size_in_bytes) {
+    if (out_data && CheckSize(size_in_bytes)) {
+        std::memcpy(out_data, &data[read_pos], size_in_bytes);
+        read_pos += size_in_bytes;
+    }
+}
+
+void Packet::Clear() {
+    data.clear();
+    read_pos = 0;
+    is_valid = true;
+}
+
+const void* Packet::GetData() const {
+    return !data.empty() ? &data[0] : nullptr;
+}
+
+void Packet::IgnoreBytes(u32 length) {
+    read_pos += length;
+}
+
+std::size_t Packet::GetDataSize() const {
+    return data.size();
+}
+
+bool Packet::EndOfPacket() const {
+    return read_pos >= data.size();
+}
+
+Packet::operator bool() const {
+    return is_valid;
+}
+
+Packet& Packet::Read(bool& out_data) {
+    u8 value{};
+    if (Read(value)) {
+        out_data = (value != 0);
+    }
+    return *this;
+}
+
+Packet& Packet::Read(s8& out_data) {
+    Read(&out_data, sizeof(out_data));
+    return *this;
+}
+
+Packet& Packet::Read(u8& out_data) {
+    Read(&out_data, sizeof(out_data));
+    return *this;
+}
+
+Packet& Packet::Read(s16& out_data) {
+    s16 value{};
+    Read(&value, sizeof(value));
+    out_data = ntohs(value);
+    return *this;
+}
+
+Packet& Packet::Read(u16& out_data) {
+    u16 value{};
+    Read(&value, sizeof(value));
+    out_data = ntohs(value);
+    return *this;
+}
+
+Packet& Packet::Read(s32& out_data) {
+    s32 value{};
+    Read(&value, sizeof(value));
+    out_data = ntohl(value);
+    return *this;
+}
+
+Packet& Packet::Read(u32& out_data) {
+    u32 value{};
+    Read(&value, sizeof(value));
+    out_data = ntohl(value);
+    return *this;
+}
+
+Packet& Packet::Read(s64& out_data) {
+    s64 value{};
+    Read(&value, sizeof(value));
+    out_data = ntohll(value);
+    return *this;
+}
+
+Packet& Packet::Read(u64& out_data) {
+    u64 value{};
+    Read(&value, sizeof(value));
+    out_data = ntohll(value);
+    return *this;
+}
+
+Packet& Packet::Read(float& out_data) {
+    Read(&out_data, sizeof(out_data));
+    return *this;
+}
+
+Packet& Packet::Read(double& out_data) {
+    Read(&out_data, sizeof(out_data));
+    return *this;
+}
+
+Packet& Packet::Read(char* out_data) {
+    // First extract string length
+    u32 length = 0;
+    Read(length);
+
+    if ((length > 0) && CheckSize(length)) {
+        // Then extract characters
+        std::memcpy(out_data, &data[read_pos], length);
+        out_data[length] = '\0';
+
+        // Update reading position
+        read_pos += length;
+    }
+
+    return *this;
+}
+
+Packet& Packet::Read(std::string& out_data) {
+    // First extract string length
+    u32 length = 0;
+    Read(length);
+
+    out_data.clear();
+    if ((length > 0) && CheckSize(length)) {
+        // Then extract characters
+        out_data.assign(&data[read_pos], length);
+
+        // Update reading position
+        read_pos += length;
+    }
+
+    return *this;
+}
+
+Packet& Packet::Write(bool in_data) {
+    Write(static_cast<u8>(in_data));
+    return *this;
+}
+
+Packet& Packet::Write(s8 in_data) {
+    Append(&in_data, sizeof(in_data));
+    return *this;
+}
+
+Packet& Packet::Write(u8 in_data) {
+    Append(&in_data, sizeof(in_data));
+    return *this;
+}
+
+Packet& Packet::Write(s16 in_data) {
+    s16 toWrite = htons(in_data);
+    Append(&toWrite, sizeof(toWrite));
+    return *this;
+}
+
+Packet& Packet::Write(u16 in_data) {
+    u16 toWrite = htons(in_data);
+    Append(&toWrite, sizeof(toWrite));
+    return *this;
+}
+
+Packet& Packet::Write(s32 in_data) {
+    s32 toWrite = htonl(in_data);
+    Append(&toWrite, sizeof(toWrite));
+    return *this;
+}
+
+Packet& Packet::Write(u32 in_data) {
+    u32 toWrite = htonl(in_data);
+    Append(&toWrite, sizeof(toWrite));
+    return *this;
+}
+
+Packet& Packet::Write(s64 in_data) {
+    s64 toWrite = htonll(in_data);
+    Append(&toWrite, sizeof(toWrite));
+    return *this;
+}
+
+Packet& Packet::Write(u64 in_data) {
+    u64 toWrite = htonll(in_data);
+    Append(&toWrite, sizeof(toWrite));
+    return *this;
+}
+
+Packet& Packet::Write(float in_data) {
+    Append(&in_data, sizeof(in_data));
+    return *this;
+}
+
+Packet& Packet::Write(double in_data) {
+    Append(&in_data, sizeof(in_data));
+    return *this;
+}
+
+Packet& Packet::Write(const char* in_data) {
+    // First insert string length
+    u32 length = static_cast<u32>(std::strlen(in_data));
+    Write(length);
+
+    // Then insert characters
+    Append(in_data, length * sizeof(char));
+
+    return *this;
+}
+
+Packet& Packet::Write(const std::string& in_data) {
+    // First insert string length
+    u32 length = static_cast<u32>(in_data.size());
+    Write(length);
+
+    // Then insert characters
+    if (length > 0)
+        Append(in_data.c_str(), length * sizeof(std::string::value_type));
+
+    return *this;
+}
+
+bool Packet::CheckSize(std::size_t size) {
+    is_valid = is_valid && (read_pos + size <= data.size());
+
+    return is_valid;
+}
+
+} // namespace Network