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+-----------------------------------------------------------------------------
+-- |
+-- Module : Plugins.Monitors.CpuFreq
+-- Copyright : (c) Juraj Hercek
+-- License : BSD-style (see LICENSE)
+--
+-- Maintainer : Juraj Hercek <juhe_haskell@hck.sk>
+-- Stability : unstable
+-- Portability : unportable
+--
+-- A cpu frequency monitor for Xmobar
+--
+-----------------------------------------------------------------------------
+
+module Xmobar.Plugins.Monitors.CpuFreq where
+
+import Xmobar.Plugins.Monitors.Common
+import Xmobar.Plugins.Monitors.CoreCommon
+
+-- |
+-- Cpu frequency default configuration. Default template contains only
+-- one core frequency, user should specify custom template in order to
+-- get more cpu frequencies.
+cpuFreqConfig :: IO MConfig
+cpuFreqConfig =
+ mkMConfig "Freq: <cpu0>" (map ((++) "cpu" . show) [0 :: Int ..])
+
+
+-- |
+-- Function retrieves monitor string holding the cpu frequency (or
+-- frequencies)
+runCpuFreq :: [String] -> Monitor String
+runCpuFreq _ = do
+ suffix <- getConfigValue useSuffix
+ ddigits <- getConfigValue decDigits
+ let path = ["/sys/devices/system/cpu/cpu", "/cpufreq/scaling_cur_freq"]
+ divisor = 1e6 :: Double
+ fmt x | x < 1 = if suffix then mhzFmt x ++ "MHz"
+ else ghzFmt x
+ | otherwise = ghzFmt x ++ if suffix then "GHz" else ""
+ mhzFmt x = show (round (x * 1000) :: Integer)
+ ghzFmt = showDigits ddigits
+ failureMessage <- getConfigValue naString
+ checkedDataRetrieval failureMessage [path] Nothing (/divisor) fmt