From 28f70b99f183caa7ebd8f55ea95d9997dd3a9003 Mon Sep 17 00:00:00 2001
From: "Costa Tsaousis (ktsaou)" <costa@tsaousis.gr>
Date: Sat, 23 Jan 2016 13:51:31 +0200
Subject: [PATCH] fix float2int()

---
 plugins.d/charts.d.plugin | 36 ++++++++++++++++++++++++------------
 1 file changed, 24 insertions(+), 12 deletions(-)

diff --git a/plugins.d/charts.d.plugin b/plugins.d/charts.d.plugin
index 43a96947..b3b387f9 100755
--- a/plugins.d/charts.d.plugin
+++ b/plugins.d/charts.d.plugin
@@ -239,32 +239,44 @@ fixid() {
 # to integer, give a multiplier
 # the result is stored in ${FLOAT2INT_RESULT}
 # so that no fork is necessary
+# the multiplier must be a power of 10
 float2int() {
 	local f="$1" m="$2" a b l
 
-	# echo >&2 "f='${f}', m='${m}'"
+	#echo >&2 "f='${f}', m='${m}'"
+
+	# the length of the multiplier - 1
+	l=$[ ${#m} - 1 ]
 
 	# split the floating point number
 	# in integer (a) and decimal (b)
 	a=${f/.*/}
 	b=${f/*./}
 
-	# the length of the multiplier
-	l=$[ ${#m} - 1 ]
-
-	# cut the decimal part if it is
-	# longer than the multiplier
-	[ ${#b} -gt ${l} ] && b=${b:0:${l}}
-	b=$[10#$b]
-
-	# prepend a zero to the integer
-	# part, if it is missing
+	# prepend a zero to the integer part
+	# if it is missing
 	[ -z "${a}" ] && a="0"
+	# strip leading zeros - base 10 convertion
 	a=$[10#$a]
 
+	# check the length of the decimal part
+	# against the length of the multiplier
+	if [ ${#b} -gt ${l} ]
+		then
+		# too many digits - take the most significant
+		b=${b:0:${l}}
+	elif [ ${#b} -lt ${l} ]
+		then
+		# too few digits - pad with zero on the right
+		local z="00000000000000000000000" r=$[l - ${#b}]
+		b="${b}${z:0:${r}}"
+	fi
+	# strip leading zeros - base 10 convertion
+	b=$[10#$b]
+
 	# store the result
 	FLOAT2INT_RESULT=$[ (a * m) + b ]
-	# echo >&2 "FLOAT2INT_RESULT='${FLOAT2INT_RESULT}'"
+	#echo >&2 "FLOAT2INT_RESULT='${FLOAT2INT_RESULT}'"
 }
 
 
-- 
2.39.2