App/Toponaming: ComplexGeoData realthunder original

Minor modifications to make it compile with previous refactorings.
The only substantial change to the original is moving the
getElementHistory function from ComplexGeoData to MappedName so
that the dehash function can remain private.

src/App/ElementMap.cpp

@@ -1155,5 +1155,58 @@ std::vector<MappedElement> ElementMap::getAll() const
     return ret;
 }
 
+long ElementMap::getElementHistory(const MappedName & name,
+                                   long masterTag,
+                                   MappedName *original,
+                                   std::vector<MappedName> *history) const
+{
+    long tag = 0;
+    int len = 0;
+    int pos = name.findTagInElementName(&tag,&len,nullptr,nullptr,true);
+    if(pos < 0) {
+        if(original)
+            *original = name;
+        return tag;
+    }
+    if(!original && !history)
+        return tag;
+
+    MappedName tmp;
+    MappedName &ret = original?*original:tmp;
+    if(name.startsWith(ELEMENT_MAP_PREFIX)) {
+        unsigned offset = ELEMENT_MAP_PREFIX_SIZE;
+        ret = MappedName::fromRawData(name, offset);
+    } else
+        ret = name;
+
+    while(1) {
+        if(!len || len>pos) {
+            FC_WARN("invalid name length " << name);
+            return 0;
+        }
+        bool dehashed = false;
+        if (ret.startsWith(MAPPED_CHILD_ELEMENTS_PREFIX, len)) {
+            int offset = (int)POSTFIX_TAG_SIZE;
+            MappedName tmp = MappedName::fromRawData(ret, len+offset, pos-len-offset);
+            MappedName postfix = dehashElementName(tmp);
+            if (postfix != tmp) {
+                dehashed = true;
+                ret = MappedName::fromRawData(ret, 0, len) + postfix;
+            }
+        }
+        if (!dehashed)
+            ret = dehashElementName(MappedName::fromRawData(ret, 0, len));
+
+        long tag2 = 0;
+        pos = ret.findTagInElementName(&tag2,&len,nullptr,nullptr,true);
+        if(pos < 0 || (tag2!=tag && tag2!=-tag && tag!=masterTag && -tag!=masterTag))
+            return tag;
+        tag = tag2;
+        if(history)
+            history->push_back(ret.copy());
+    }
+}
+
+
 
 }// Namespace Data