Squashed 'src/ipc/libmultiprocess/' content from commit 35944ffd23fa

git-subtree-dir: src/ipc/libmultiprocess
git-subtree-split: 35944ffd23fa26652b82210351d50e896ce16c8f

include/mp/type-string.h

@@ -0,0 +1,34 @@
+// Copyright (c) 2025 The Bitcoin Core developers
+// Distributed under the MIT software license, see the accompanying
+// file COPYING or http://www.opensource.org/licenses/mit-license.php.
+
+#ifndef MP_PROXY_TYPE_STRING_H
+#define MP_PROXY_TYPE_STRING_H
+
+#include <mp/util.h>
+
+namespace mp {
+template <typename Value, typename Output>
+void CustomBuildField(TypeList<std::string>,
+    Priority<1>,
+    InvokeContext& invoke_context,
+    Value&& value,
+    Output&& output)
+{
+    auto result = output.init(value.size());
+    memcpy(result.begin(), value.data(), value.size());
+}
+
+template <typename Input, typename ReadDest>
+decltype(auto) CustomReadField(TypeList<std::string>,
+    Priority<1>,
+    InvokeContext& invoke_context,
+    Input&& input,
+    ReadDest&& read_dest)
+{
+    auto data = input.get();
+    return read_dest.construct(CharCast(data.begin()), data.size());
+}
+} // namespace mp
+
+#endif // MP_PROXY_TYPE_STRING_H