fix for parsing scientific notation numbers #211

diff --git a/plugins.d/charts.d.plugin b/plugins.d/charts.d.plugin
index 40c0356c8f3699bc2bc33dab307fdb82aaf35f4d..aaf7c13be6107444b285b9f42420a05570e2a4ab 100755 (executable)
--- a/plugins.d/charts.d.plugin
+++ b/plugins.d/charts.d.plugin
@@ -249,15 +249,26 @@ float2int() {
        # the length of the multiplier - 1
        l=$[ ${#m} - 1 ]
 
+       # check if the number is in scientific notation
+       if [[ ${f} =~ ^[[:space:]](-)?[0-9.]+(e|E)(\+|-)[0-9]+ ]]
+               then
+               # convert it to decimal
+               # unfortunately, this fork cannot be avoided
+               # if you know of a way to avoid it, please let me know
+               f=$(printf "%0.${l}f" ${f})
+       fi
+
        # split the floating point number
        # in integer (a) and decimal (b)
        a=${f/.*/}
        b=${f/*./}
 
-       # prepend a zero to the integer part
-       # if it is missing
+       # if the integer part is missing
+       # set it to zero
        [ -z "${a}" ] && a="0"
-       # strip leading zeros - base 10 convertion
+
+       # strip leading zeros from the integer part
+       # base 10 convertion
        a=$[10#$a]
 
        # check the length of the decimal part
@@ -266,13 +277,16 @@ float2int() {
                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
+
+       # strip leading zeros from the decimal part
+       # base 10 convertion
        b=$[10#$b]
 
        # store the result