Upload CTID.h

CTID.h

@@ -0,0 +1,88 @@
+//------------------------------------------------------------------------------
+/*
+    This file is part of rippled: https://github.com/ripple/rippled
+    Copyright (c) 2019 Ripple Labs Inc.
+
+    Permission to use, copy, modify, and/or distribute this software for any
+    purpose  with  or without fee is hereby granted, provided that the above
+    copyright notice and this permission notice appear in all copies.
+
+    THE  SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH  REGARD  TO  THIS  SOFTWARE  INCLUDING  ALL  IMPLIED  WARRANTIES  OF
+    MERCHANTABILITY  AND  FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY  SPECIAL ,  DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER  RESULTING  FROM  LOSS  OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION  OF  CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+//==============================================================================
+
+#ifndef RIPPLE_RPC_CTID_H_INCLUDED
+#define RIPPLE_RPC_CTID_H_INCLUDED
+
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/regex.hpp>
+#include <optional>
+#include <regex>
+#include <sstream>
+
+namespace ripple {
+
+namespace RPC {
+
+inline std::optional<std::string>
+encodeCTID(
+    uint32_t ledger_seq,
+    uint16_t txn_index,
+    uint16_t network_id) noexcept
+{
+    if (ledger_seq > 0x0FFF'FFFF)
+        return {};
+
+    uint64_t ctidValue =
+        ((0xC000'0000ULL + static_cast<uint64_t>(ledger_seq)) << 32) +
+        (static_cast<uint64_t>(txn_index) << 16) + network_id;
+
+    std::stringstream buffer;
+    buffer << std::hex << std::uppercase << std::setfill('0') << std::setw(16)
+           << ctidValue;
+    return {buffer.str()};
+}
+
+template <typename T>
+inline std::optional<std::tuple<uint32_t, uint16_t, uint16_t>>
+decodeCTID(const T ctid) noexcept
+{
+    uint64_t ctidValue{0};
+    if constexpr (
+        std::is_same_v<T, std::string> || std::is_same_v<T, char*> ||
+        std::is_same_v<T, const char*> || std::is_same_v<T, std::string_view>)
+    {
+        std::string const ctidString(ctid);
+
+        if (ctidString.length() != 16)
+            return {};
+
+        if (!boost::regex_match(ctidString, boost::regex("^[0-9A-F]+$")))
+            return {};
+
+        ctidValue = std::stoull(ctidString, nullptr, 16);
+    }
+    else if constexpr (std::is_integral_v<T>)
+        ctidValue = ctid;
+    else
+        return {};
+
+    if ((ctidValue & 0xF000'0000'0000'0000ULL) != 0xC000'0000'0000'0000ULL)
+        return {};
+
+    uint32_t ledger_seq = (ctidValue >> 32) & 0xFFFF'FFFUL;
+    uint16_t txn_index = (ctidValue >> 16) & 0xFFFFU;
+    uint16_t network_id = ctidValue & 0xFFFFU;
+    return {{ledger_seq, txn_index, network_id}};
+}
+
+}  // namespace RPC
+}  // namespace ripple
+
+#endif