From 47094ea66b449cbf0c3947d573c407275d25c8e2 Mon Sep 17 00:00:00 2001
From: Yann Collet <yann.collet.73@gmail.com>
Date: Mon, 26 Sep 2016 18:03:33 +0200
Subject: [PATCH] added comment on filePos

---
 lib/dictBuilder/zdict.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/dictBuilder/zdict.c b/lib/dictBuilder/zdict.c
index 8a38aadeb..874351ebf 100644
--- a/lib/dictBuilder/zdict.c
+++ b/lib/dictBuilder/zdict.c
@@ -505,7 +505,8 @@ static size_t ZDICT_trainBuffer(dictItem* dictList, U32 dictListSize,
     {   size_t pos;
         for (pos=0; pos < bufferSize; pos++)
             reverseSuffix[suffix[pos]] = (U32)pos;
-        /* build file pos */
+        /* note filePos tracks borders between samples.
+           It's not used at this stage, but planned to become useful in a later update */
         filePos[0] = 0;
         for (pos=1; pos<nbFiles; pos++)
             filePos[pos] = (U32)(filePos[pos-1] + fileSizes[pos-1]);