From 4e9a857b90c3c17271bfc033570605be99de6b93 Mon Sep 17 00:00:00 2001
From: cheatfate <eugene.kabanov@status.im>
Date: Thu, 18 Feb 2021 16:27:00 +0200
Subject: [PATCH] Link to original procedure for hexValue().

---
 chronos/streams/chunkstream.nim | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/chronos/streams/chunkstream.nim b/chronos/streams/chunkstream.nim
index 5e36b83..d5f439e 100644
--- a/chronos/streams/chunkstream.nim
+++ b/chronos/streams/chunkstream.nim
@@ -37,6 +37,8 @@ proc LT(x, y: uint32): uint32 {.inline.} =
   (z xor ((y xor x) and (y xor z))) shr 31
 
 proc hexValue(c: byte): int =
+  # This is nim adaptation of
+  # https://github.com/pornin/CTTK/blob/master/src/hex.c#L28-L52
   let x = uint32(c) - 0x30'u32
   let y = uint32(c) - 0x41'u32
   let z = uint32(c) - 0x61'u32