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add api to check whether the dst is active

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arkdro
2013-02-21 00:07:14 +04:00
parent d7d8f70463
commit 7bcd1596b0
1 changed files with 17 additions and 0 deletions
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17
src/ezic.erl
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@@ -5,6 +5,8 @@
localtime/1 localtime/1
, utc_to_local/2 , utc_to_local/2
, local_to_utc/2 , local_to_utc/2
, has_dst_utc/2
, has_dst_local/2
]). ]).
@@ -30,7 +32,11 @@ local_to_utc(LocalDatetime, TzName) ->
local_to_utc_handleFlatzone(LocalDatetime, ezic_db:flatzone(NormalDatetime, TzName)). local_to_utc_handleFlatzone(LocalDatetime, ezic_db:flatzone(NormalDatetime, TzName)).
has_dst_utc(Datetime, TzName) ->
has_dst(Datetime, TzName, u).
has_dst_local(Datetime, TzName) ->
has_dst(Datetime, TzName, w).
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% PRIVATE % PRIVATE
@@ -55,3 +61,14 @@ local_to_utc_handleFlatzone(LocalDatetime, #flatzone{offset=Offset, dstoffset=DS
, Offset, {0,0,0}) , Offset, {0,0,0})
, DSTOffset, {0,0,0}). , DSTOffset, {0,0,0}).
has_dst(Datetime, TzName, Flag) ->
NormalDatetime = ezic_date:normalize(Datetime, Flag),
case ezic_db:flatzone(NormalDatetime, TzName) of
#flatzone{dstoffset={0,0,0}} ->
false;
#flatzone{dstoffset={_,_,_}} ->
true;
_ ->
false
end.