Merge branch 'sverk/maps-erl_interface'

* sverk/maps-erl_interface:
  erts: Add distribution capability flag for maps DFLAG_MAP_TAG
  erts: Change external format for maps
  erts: Document external format for maps (MAP_EXT)
  erl_interface: Add test for ei_skip_term of container terms
  erl_interface: Add map support in ei_skip_term
  erl_interface: Fix mem leak in ei_decode_encode_test
  erl_interface: test decode/encode of maps
  erl_interface: Add ei encode/decode for maps
  erl_interface: test decode_encode of tuples and lists
  erl_interface: refactor ei_decode_encode_test.c

1 files changed, 33 insertions, 1 deletions

diff --git a/lib/erl_interface/doc/src/ei.xml b/lib/erl_interface/doc/src/ei.xml
index ab185c9179..90495eebd6 100644
--- a/lib/erl_interface/doc/src/ei.xml
+++ b/lib/erl_interface/doc/src/ei.xml
@@ -4,7 +4,7 @@
 <cref>
   <header>
     <copyright>
-      <year>2001</year><year>2013</year>
+      <year>2001</year><year>2014</year>
       <holder>Ericsson AB. All Rights Reserved.</holder>
     </copyright>
     <legalnotice>
@@ -417,6 +417,26 @@ ei_x_encode_empty_list(&amp;x);
       </desc>
     </func>
     <func>
+      <name><ret>int</ret><nametext>ei_encode_map_header(char *buf, int *index, int arity)</nametext></name>
+      <name><ret>int</ret><nametext>ei_x_encode_map_header(ei_x_buff* x, int arity)</nametext></name>
+      <fsummary>Encode a map</fsummary>
+      <desc>
+        <p>This function encodes a map header, with a specified arity. The next
+	   <c>arity*2</c> terms encoded will be the keys and values of the map
+	   encoded in the following order: <c>K1, V1, K2, V2, ..., Kn, Vn</c>.
+	</p>
+        <p>E.g. to encode the map <c>#{a => "Apple", b => "Banana"}</c>:</p>
+        <pre>
+ei_x_encode_map_header(&amp;x, 2);
+ei_x_encode_atom(&amp;x, "a");
+ei_x_encode_string(&amp;x, "Apple");
+ei_x_encode_atom(&amp;x, "b");
+ei_x_encode_string(&amp;x, "Banana");
+        </pre>
+	<p>A correctly encoded map can not have duplicate keys.</p>
+      </desc>
+    </func>
+    <func>
       <name><ret>int</ret><nametext>ei_get_type(const char *buf, const int *index, int *type, int *size)</nametext></name>
       <fsummary>Fetch the type and size of an encoded term</fsummary>
       <desc>
@@ -638,6 +658,18 @@ ei_x_encode_empty_list(&amp;x);
       </desc>
     </func>
     <func>
+      <name><ret>int</ret><nametext>ei_decode_map_header(const char *buf, int *index, int *arity)</nametext></name>
+      <fsummary>Decode a map</fsummary>
+      <desc>
+        <p>This function decodes a map header from the binary
+          format. The number of key-value pairs is returned in
+          <c>*arity</c>. Keys and values follow in the following order:
+	  <c>K1, V1, K2, V2, ..., Kn, Vn</c>. This makes a total of
+	  <c>arity*2</c> terms. If <c>arity</c> is zero, it's an empty map.
+	  A correctly encoded map does not have duplicate keys.</p>
+      </desc>
+    </func>
+    <func>
       <name><ret>int</ret><nametext>ei_decode_ei_term(const char* buf, int* index, ei_term* term)</nametext></name>
       <fsummary>Decode a term, without prior knowledge of type</fsummary>
       <desc>