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authorLukas Larsson <[email protected]>2011-07-13 12:17:00 +0200
committerLukas Larsson <[email protected]>2011-07-21 14:50:21 +0200
commit220f8190fd49369c9fcfd25e56acdfb3340eeb3b (patch)
treec5154d853aa0bcc6478af57fd43b6d29662fedea /lib/asn1
parent6613732f28da2977c308500eacabea5fe332f5fa (diff)
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Optmized encode_length by doing some calculations at compile time rather than runtime
Diffstat (limited to 'lib/asn1')
-rw-r--r--lib/asn1/src/asn1ct_constructed_per.erl40
1 files changed, 37 insertions, 3 deletions
diff --git a/lib/asn1/src/asn1ct_constructed_per.erl b/lib/asn1/src/asn1ct_constructed_per.erl
index 72c8a3fd9a..dd681fdebe 100644
--- a/lib/asn1/src/asn1ct_constructed_per.erl
+++ b/lib/asn1/src/asn1ct_constructed_per.erl
@@ -439,9 +439,7 @@ gen_encode_sof(Erule,Typename,SeqOrSetOf,D) when is_record(D,type) ->
_->
""
end,
- emit({nl,indent(3),"?RT_PER:encode_length(",
- {asis,SizeConstraint},
- ",length(Val)),",nl}),
+ gen_encode_length(SizeConstraint, is_optimized(Erule)),
emit({indent(3),"'enc_",asn1ct_gen:list2name(Typename),
"_components'(Val",ObjFun,", [])"}),
emit({nl,"].",nl}),
@@ -453,6 +451,42 @@ gen_encode_sof(Erule,Typename,SeqOrSetOf,D) when is_record(D,type) ->
end,
gen_encode_sof_components(Erule,Typename,SeqOrSetOf,NewComponentType).
+
+%% Logic copied from asn1_per_bin_rt2ct:encode_constrained_number
+gen_encode_length({Lb,Ub},true) when Ub =< 65535, Lb >= 0 ->
+ Range = Ub - Lb + 1,
+ V2 = ["(length(Val) - ",Lb,")"],
+ Encode = if
+ Range == 1 ->
+ "[]";
+ Range == 2 ->
+ {"[",V2,"]"};
+ Range =< 4 ->
+ {"[10,2,",V2,"]"};
+ Range =< 8 ->
+ {"[10,3,",V2,"]"};
+ Range =< 16 ->
+ {"[10,4,",V2,"]"};
+ Range =< 32 ->
+ {"[10,5,",V2,"]"};
+ Range =< 64 ->
+ {"[10,6,",V2,"]"};
+ Range =< 128 ->
+ {"[10,7,",V2,"]"};
+ Range =< 255 ->
+ {"[10,8,",V2,"]"};
+ Range =< 256 ->
+ {"[20,1,",V2,"]"};
+ Range =< 65536 ->
+ {"[20,2,<<",V2,":16>>]"};
+ true ->
+ {"?RT_PER:encode_length(",{asis,{Lb,Ub}},",length(Val))"}
+ end,
+ emit({nl,Encode,",",nl});
+gen_encode_length(SizeConstraint,_) ->
+ emit({nl,indent(3),"?RT_PER:encode_length(",
+ {asis,SizeConstraint},",length(Val)),",nl}).
+
gen_decode_sof(Erules,Typename,SeqOrSetOf,D) when is_record(D,type) ->
asn1ct_name:start(),
{_SeqOrSetOf,ComponentType} = D#type.def,