Add disambiguation to to_now and to_unixtime

README.markdown

@@ -72,7 +72,8 @@ timezone. For example, `to_date(Date, auto)` is exactly the same as
 **A Note About Argument Order**: In all cases, `ToTimezone` is optional and if
 omitted, will be determined as described below in "Understanding Timezone
 Determining and Conversion". If `ToTimezone` is specified, it will always be
-immediately left of the `Date` argument. `Date` will always be the last
+immediately left of the `Disambiguate` argument (if it's specified), which is
+always immediately left of `Date` argument. `Date` will always be the last
 argument to any of the conversion and formatting functions.
 
 #### Understanding Timezone Determining and Conversions
@@ -120,8 +121,9 @@ provide an option to disambiguate if you so desire. By default disambiguation
 is disabled, and `qdate` will just guess as to it's best choice. But if you so
 desire, you can make sure qdate does *both* conversions, and returns both.
 
-You can do this by passing a `Disambiguation` argument to `to_string` or
-`to_date`. `Disambiguation` can be an atom of the values:
+You can do this by passing a `Disambiguation` argument to `to_string`,
+`to_date`, `to_unixtime`, and `to_now`. `Disambiguation` can be an atom of the
+values:
 
   + `prefer_standard` *(Default Behavior)*: If an ambiguous result occurs,
     qdate will return the date in standard time rather than daylight time.
@@ -131,10 +133,12 @@ You can do this by passing a `Disambiguation` argument to `to_string` or
     `{ambiguous, DateStandard, DateDaylight}`, where `DateStandard` is the date
 	in Standard Time, and `DateDaylight` is the date in Daylight Saving Time.
 
-So the two more helper functions are:
+So the expanded conversions functions are:
 
   + `to_date(ToTimezone, Disambiguate, Date)`
   + `to_string(FormatString, ToTimezone, Disambiguate, Date)`
+  + `to_unixtime(Disambiguate, Date)`
+  + `to_now(Disambiguate, Date)`
 
 Examples:
 

src/qdate.erl

@@ -18,7 +18,9 @@
     to_date/2,
     to_date/3,
     to_now/1,
+    to_now/2,
     to_unixtime/1,
+    to_unixtime/2,
     unixtime/0
 ]).
 
@@ -250,24 +252,41 @@ get_deterministic_datetime() ->
         {ok, Val}           -> throw({invalid_env_var, {qdate, deterministic_parsing, Val}})
     end.
 
+to_unixtime(Date) ->
+    to_unixtime(?DEFAULT_DISAMBIG, Date).
 
-to_unixtime(Unixtime) when is_integer(Unixtime) ->
+to_unixtime(_, Unixtime) when is_integer(Unixtime) ->
     Unixtime;
-to_unixtime({MegaSecs,Secs,_}) ->
+to_unixtime(_, {MegaSecs,Secs,_}) ->
     MegaSecs*1000000 + Secs;
-to_unixtime(ToParse) ->
+to_unixtime(Disamb, ToParse) ->
     %% We want to treat all unixtimes as GMT
-    Date = to_date("GMT", ToParse),
-    calendar:datetime_to_gregorian_seconds(Date) - ?UNIXTIME_BASE.
+    case to_date("GMT", Disamb, ToParse) of
+        {ambiguous, Standard, Daylight} ->
+            {ambiguous,
+                calendar:datetime_to_gregorian_seconds(Standard) - ?UNIXTIME_BASE,
+                calendar:datetime_to_gregorian_seconds(Daylight) - ?UNIXTIME_BASE};
+        Date ->
+            calendar:datetime_to_gregorian_seconds(Date) - ?UNIXTIME_BASE
+    end.
 
 unixtime() ->
     to_unixtime(os:timestamp()).
 
-to_now(Now = {_,_,_}) ->
+to_now(Date) ->
+    to_now(?DEFAULT_DISAMBIG, Date).
+
+to_now(_, Now = {_,_,_}) ->
     Now;
-to_now(ToParse) ->
-    Unixtime = to_unixtime(ToParse),
-    unixtime_to_now(Unixtime).
+to_now(Disamb, ToParse) ->
+    case to_unixtime(Disamb, ToParse) of
+        {ambiguous, Standard, Daylight} ->
+            {ambiguous, 
+                unixtime_to_now(Standard),
+                unixtime_to_now(Daylight)};
+        Unixtime ->
+            unixtime_to_now(Unixtime)
+    end.
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%