From 2f66eb9fec486b44bb4d568d0098fad6d4fe8812 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=9B=D0=B5=D0=BE=D0=BD=D0=B8=D0=B4=20=D0=AE=D1=80=D1=8C?=
 =?UTF-8?q?=D0=B5=D0=B2=20=28Leonid=20Yuriev=29?= <leo@yuriev.ru>
Date: Wed, 15 May 2024 00:09:58 +0300
Subject: [PATCH] =?UTF-8?q?mdbx-tools:=20=D0=BF=D1=80=D0=B5=D0=BE=D0=B1?=
 =?UTF-8?q?=D1=80=D0=B0=D0=B7=D0=BE=D0=B2=D0=B0=D0=BD=D0=B8=D0=B5=20=D0=B8?=
 =?UTF-8?q?=D0=B7=20hex=20=D0=B1=D0=B5=D0=B7=20=D0=BF=D0=B5=D1=80=D0=B5?=
 =?UTF-8?q?=D1=85=D0=BE=D0=B4=D0=BE=D0=B2=20=D0=B2=20`mdbx=5Fload`.?=
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---
 src/tools/load.c | 19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/src/tools/load.c b/src/tools/load.c
index ade698f3..77a81864 100644
--- a/src/tools/load.c
+++ b/src/tools/load.c
@@ -369,16 +369,15 @@ static int badend(void) {
 }
 
 static inline int unhex(unsigned char *c2) {
-  int x, c;
-  x = *c2++ & 0x4f;
-  if (x & 0x40)
-    x -= 55;
-  c = x << 4;
-  x = *c2 & 0x4f;
-  if (x & 0x40)
-    x -= 55;
-  c |= x;
-  return c;
+  int8_t hi = c2[0];
+  hi = (hi | 0x20) - 'a';
+  hi += 10 + ((hi >> 7) & 39);
+
+  int8_t lo = c2[1];
+  lo = (lo | 0x20) - 'a';
+  lo += 10 + ((lo >> 7) & 39);
+
+  return hi << 4 | lo;
 }
 
 __hot static int readline(MDBX_val *out, MDBX_val *buf) {