From 8649b9257876d1b016746126c95c9e803a680e5d Mon Sep 17 00:00:00 2001
From: Lukas Larsson <lukas@erlang-solutions.com>
Date: Fri, 22 Jul 2011 16:55:33 +0200
Subject: Extract generic is_nif_loadable function from decode

---
 lib/asn1/src/asn1rt_ber_bin_v2.erl | 34 ++++++++++++++++++++++------------
 1 file changed, 22 insertions(+), 12 deletions(-)

(limited to 'lib')

diff --git a/lib/asn1/src/asn1rt_ber_bin_v2.erl b/lib/asn1/src/asn1rt_ber_bin_v2.erl
index 2df289e2b8..4c75b5918f 100644
--- a/lib/asn1/src/asn1rt_ber_bin_v2.erl
+++ b/lib/asn1/src/asn1rt_ber_bin_v2.erl
@@ -54,6 +54,8 @@
 
 -export([decode_primitive_incomplete/2,decode_selective/2]).
  
+-compile(export_all).
+
 -include("asn1_records.hrl"). 
  
 % the encoding of class of tag bits 8 and 7 
@@ -164,28 +166,36 @@ decode(B) ->
 
 %% asn1-1.7
 decode(B, nif) ->
-    case application:get_env(asn1, nif_loadable) of
-	{ok, true} ->
+    case is_nif_loadable() of
+	true ->
 	    case asn1rt_nif:decode_ber_tlv(B) of
 		{error, Reason} -> handle_error(Reason, B);
 		Else -> Else
 	    end;
-	{ok, false} ->
-	    decode(B);
-	undefined ->
-	    case catch code:load_file(asn1rt_nif) of
-		{module, asn1rt_nif} ->
-		    application:set_env(asn1, nif_loadable, true);
-		_Else ->
-		    application:set_env(asn1, nif_loadable, false)
-	    end,
-	    decode(B, nif)
+	false ->
+	    decode(B)
     end;
 decode(B,erlang) when is_binary(B) ->
     decode_primitive(B);
 decode(Tlv,erlang) ->
     {Tlv,<<>>}.
 
+%% Have to check this since asn1 is not guaranteed to be available
+is_nif_loadable() ->
+    case application:get_env(asn1, nif_loadable) of
+	{ok,R} ->
+	    R;
+	undefined ->
+	    case catch code:load_file(asn1rt_nif) of
+		{module, asn1rt_nif} ->
+		    application:set_env(asn1, nif_loadable, true),
+		    true;
+		_Else ->
+		    application:set_env(asn1, nif_loadable, false),
+		    false
+	    end
+    end.
+
 handle_error([],_)->
     exit({error,{asn1,{"memory allocation problem"}}});
 handle_error({$1,_},L) -> % error in nif
-- 
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