From 0f78b06e8c578819f831a513490278a5f70b01af Mon Sep 17 00:00:00 2001
From: Lee Clagett <code@leeclagett.com>
Date: Thu, 7 Nov 2019 05:45:06 +0000
Subject: Various improvements to the ZMQ JSON-RPC handling:

  - Finding handling function in ZMQ JSON-RPC now uses binary search
  - Temporary `std::vector`s in JSON output now use `epee::span` to
    prevent allocations.
  - Binary -> hex in JSON output no longer allocates temporary buffer
  - C++ structs -> JSON skips intermediate DOM creation, and instead
    write directly to an output stream.
---
 contrib/epee/include/hex.h | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

(limited to 'contrib/epee')

diff --git a/contrib/epee/include/hex.h b/contrib/epee/include/hex.h
index 6e720f128..4e8f90786 100644
--- a/contrib/epee/include/hex.h
+++ b/contrib/epee/include/hex.h
@@ -51,12 +51,22 @@ namespace epee
     template<std::size_t N>
     static std::array<char, N * 2> array(const std::array<std::uint8_t, N>& src) noexcept
     {
-      std::array<char, N * 2> out{{}};
+      std::array<char, N * 2> out;
       static_assert(N <= 128, "keep the stack size down");
       buffer_unchecked(out.data(), {src.data(), src.size()});
       return out;
     }
 
+    //! \return An array containing hex of `src`.
+    template<typename T>
+    static std::array<char, sizeof(T) * 2> array(const T& src) noexcept
+    {
+      std::array<char, sizeof(T) * 2> out;
+      static_assert(sizeof(T) <= 128, "keep the stack size down");
+      buffer_unchecked(out.data(), as_byte_span(src));
+      return out;
+    }
+
     //! Append `src` as hex to `out`.
     static void buffer(std::ostream& out, const span<const std::uint8_t> src);
 
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