# HG changeset patch
# User Matti Hamalainen <ccr@tnsp.org>
# Date 1577711935 -7200
# Node ID a3e3b26accd5ef0ac79f6cacf397647e2a03a71c
# Parent  7615dbdc4d34a15cb6e3ee079fad6aa3e6d5feef
Add comment about minimum buffer size requirement.

diff -r 7615dbdc4d34 -r a3e3b26accd5 th_printf1.c
--- a/th_printf1.c	Mon Dec 30 15:16:04 2019 +0200
+++ b/th_printf1.c	Mon Dec 30 15:18:55 2019 +0200
@@ -35,14 +35,17 @@
     if (val == 0)
         return 0;
 
+    // We assume that the output buffer is at least 2 bytes long
     *pos = 0;
     do
     {
         TH_PFUNC_TYPE_U digit = val % f_radix;
+
         if (digit < 10)
             buf[*pos] = '0' + digit;
         else
             buf[*pos] = (f_upcase ? 'A' : 'a') + digit - 10;
+
         val /= f_radix;
         (*pos)++;
     }