From 6929ba75c06a6b8ff6911c660f2d4e5a9e4f5170 Mon Sep 17 00:00:00 2001
From: Thomas Geymayer <tomgey@gmail.com>
Date: Sun, 18 May 2014 13:33:10 +0200
Subject: [PATCH] cppbind: convert maps from nasal.

---
 simgear/nasal/cppbind/NasalHash.cxx    |  8 ++++++++
 simgear/nasal/cppbind/NasalHash.hxx    | 24 ++++++++++++++++++++++++
 simgear/nasal/cppbind/cppbind_test.cxx |  5 +++++
 3 files changed, 37 insertions(+)

diff --git a/simgear/nasal/cppbind/NasalHash.cxx b/simgear/nasal/cppbind/NasalHash.cxx
index d1dd3be3..7cd99468 100644
--- a/simgear/nasal/cppbind/NasalHash.cxx
+++ b/simgear/nasal/cppbind/NasalHash.cxx
@@ -54,6 +54,14 @@ namespace nasal
                                                                 : naNil();
   }
 
+  //----------------------------------------------------------------------------
+  std::vector<std::string> Hash::keys() const
+  {
+    naRef keys = naNewVector(_context);
+    naHash_keys(keys, _hash);
+    return from_nasal<std::vector<std::string> >(_context, keys);
+  }
+
   //----------------------------------------------------------------------------
   Hash Hash::createHash(const std::string& name)
   {
diff --git a/simgear/nasal/cppbind/NasalHash.hxx b/simgear/nasal/cppbind/NasalHash.hxx
index e1de133d..e330428e 100644
--- a/simgear/nasal/cppbind/NasalHash.hxx
+++ b/simgear/nasal/cppbind/NasalHash.hxx
@@ -22,6 +22,8 @@
 #include "from_nasal.hxx"
 #include "to_nasal.hxx"
 
+#include <simgear/structure/map.hxx>
+
 namespace nasal
 {
 
@@ -101,6 +103,11 @@ namespace nasal
         return from_nasal_helper(_context, get(name), static_cast<Sig*>(0));
       }
 
+      /**
+       * Get a list of all keys
+       */
+      std::vector<std::string> keys() const;
+
       /**
        * Create a new child hash (module)
        *
@@ -129,4 +136,21 @@ namespace nasal
 
 } // namespace nasal
 
+template<class Value>
+simgear::Map<std::string, Value>
+from_nasal_helper( naContext c,
+                   naRef ref,
+                   const simgear::Map<std::string, Value>* )
+{
+
+  nasal::Hash hash = from_nasal_helper(c, ref, static_cast<nasal::Hash*>(0));
+  std::vector<std::string> const& keys = hash.keys();
+
+  simgear::Map<std::string, Value> map;
+  for(size_t i = 0; i < keys.size(); ++i)
+    map[ keys[i] ] = hash.get<Value>(keys[i]);
+
+  return map;
+}
+
 #endif /* SG_NASAL_HASH_HXX_ */
diff --git a/simgear/nasal/cppbind/cppbind_test.cxx b/simgear/nasal/cppbind/cppbind_test.cxx
index 098b21af..9dce3e1e 100644
--- a/simgear/nasal/cppbind/cppbind_test.cxx
+++ b/simgear/nasal/cppbind/cppbind_test.cxx
@@ -168,6 +168,11 @@ int main(int argc, char* argv[])
   r = to_nasal(c, hash);
   VERIFY( naIsHash(r) );
 
+  simgear::StringMap string_map = from_nasal<simgear::StringMap>(c, r);
+  VERIFY( string_map.at("vec") == "string" )
+  VERIFY( string_map.at("name") == "my-name" )
+  VERIFY( string_map.at("string") == "blub" )
+
   VERIFY( hash.get<std::string>("name") == "my-name" );
   VERIFY( naIsString(hash.get("name")) );
 
-- 
2.39.5