From 9718dabe6c6d5979e3f6837ef04a39d3ad8c786c Mon Sep 17 00:00:00 2001
From: Martin Perner <martin@perner.cc>
Date: Wed, 26 Oct 2011 01:00:32 +0200
Subject: Adding locale support to Date plugins

This commits adds support for localized datetime outputs like date(1).
---
 src/Localize.hsc | 98 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 98 insertions(+)
 create mode 100644 src/Localize.hsc

(limited to 'src/Localize.hsc')

diff --git a/src/Localize.hsc b/src/Localize.hsc
new file mode 100644
index 0000000..bfaa6f0
--- /dev/null
+++ b/src/Localize.hsc
@@ -0,0 +1,98 @@
+{-# LANGUAGE ForeignFunctionInterface #-}
+-----------------------------------------------------------------------------
+-- |
+-- Module      :  Localize
+-- Copyright   :  (C) 2011 Martin Perner
+-- License     :  BSD-style (see LICENSE)
+--
+-- Maintainer  :  Martin Perner <martin@perner.cc>
+-- Stability   :  unstable
+-- Portability :  unportable
+--
+-- This module provides an interface to locale information e.g. for DateL
+--
+-----------------------------------------------------------------------------
+
+module Localize
+    ( setupTimeLocale,
+      getTimeLocale
+    ) where
+
+import Foreign
+import Foreign.C
+import qualified System.Locale as L
+
+#ifdef UTF8
+import Codec.Binary.UTF8.String
+#endif
+
+--  get localized strings
+type NlItem = CInt
+
+#include <langinfo.h>
+foreign import ccall unsafe "langinfo.h nl_langinfo"
+  nl_langinfo :: NlItem -> IO CString
+
+#{enum NlItem,
+  , AM_STR , PM_STR \
+  , D_T_FMT , D_FMT , T_FMT , T_FMT_AMPM \
+  , ABDAY_1 , ABDAY_2 , ABDAY_3 , ABDAY_4 , ABDAY_5 , ABDAY_6 , ABDAY_7 \
+  , DAY_1 , DAY_2 , DAY_3 , DAY_4 , DAY_5 , DAY_6 , DAY_7 \
+  , ABMON_1 , ABMON_2 , ABMON_3 , ABMON_4 , ABMON_5 , ABMON_6 , ABMON_7 \
+  , ABMON_8 , ABMON_9 , ABMON_10 , ABMON_11 , ABMON_12 \
+  , MON_1 , MON_2 , MON_3 , MON_4  , MON_5 , MON_6 , MON_7 , MON_8 , MON_9 \
+  , MON_10 , MON_11 , MON_12\
+ }
+
+#let LIST_CTR fst,snd,idx = "( getLangInfo "fst""idx" , getLangInfo "snd""idx" )"
+
+getLangInfo :: NlItem -> String
+#ifdef UTF8
+getLangInfo item = decodeString $ unsafePerformIO $ getLangInfo' item
+#else
+getLangInfo item = unsafePerformIO $ getLangInfo' item
+#endif
+
+getLangInfo' :: NlItem -> IO String
+getLangInfo' item = do
+  itemStr <- nl_langinfo item
+  peekCString itemStr
+
+#include <locale.h>
+foreign import ccall unsafe "locale.h setlocale"
+    setlocale :: CInt -> CString -> IO CString
+
+setupTimeLocale :: String -> IO ()
+setupTimeLocale l = withCString l (setlocale #const LC_TIME) >> return ()
+
+getTimeLocale :: L.TimeLocale
+getTimeLocale = L.TimeLocale {
+    L.wDays = [ #{LIST_CTR "day","abday","1"}
+              , #{LIST_CTR "day","abday","2"}
+              , #{LIST_CTR "day","abday","3"}
+              , #{LIST_CTR "day","abday","4"}
+              , #{LIST_CTR "day","abday","5"}
+              , #{LIST_CTR "day","abday","6"}
+              , #{LIST_CTR "day","abday","7"}
+              ],
+    L.months = [ #{LIST_CTR "mon","abmon","1"}
+               , #{LIST_CTR "mon","abmon","2"}
+               , #{LIST_CTR "mon","abmon","3"}
+               , #{LIST_CTR "mon","abmon","4"}
+               , #{LIST_CTR "mon","abmon","5"}
+               , #{LIST_CTR "mon","abmon","6"}
+               , #{LIST_CTR "mon","abmon","7"}
+               , #{LIST_CTR "mon","abmon","8"}
+               , #{LIST_CTR "mon","abmon","9"}
+               , #{LIST_CTR "mon","abmon","10"}
+               , #{LIST_CTR "mon","abmon","11"}
+               , #{LIST_CTR "mon","abmon","12"}
+              ],
+    -- Intervals are not available from this interface
+    L.intervals = L.intervals L.defaultTimeLocale,
+    L.amPm = (getLangInfo amStr, getLangInfo pmStr),
+    L.dateTimeFmt = getLangInfo dTFmt,
+    L.dateFmt = getLangInfo dFmt,
+    L.timeFmt = getLangInfo tFmt,
+    L.time12Fmt = getLangInfo tFmtAmpm
+  }
-- 
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