Debug PGN parsing from a string. Add the ParseSANMoves() function. Add a new tests set

src/LargeFileStream.cpp

@@ -37,8 +37,9 @@ char LargeFileStream::operator[](loctype loc) {
   if (use_string) {
     if (loc >= content.size()) {
       eof = true;
+      return ('?');
     }
-    return ('?');
+    return (content[loc]);
   }
 
   // Goto the right memory chuck

src/PGN.cpp

@@ -410,4 +410,13 @@ loctype PGN::GotoEOL(loctype loc) {
   }
 }
 
+void ParseSANMoves(const std::string &sequence,HalfMove *moves) {
+  PGN parser;
+  // Note that PGN need a results (* at the end)
+  // Otherwise an InvalidGameResult exception is raised
+  parser.FromString(sequence+" *");
+  parser.ParseNextGame();
+  parser.GetMoves(moves);
+}
+
 } // namespace pgnp

src/PGN.hpp

@@ -102,4 +102,12 @@ struct STRCheckFailed : public std::exception {
   }
 };
 
+/**
+ * @brief Parse a simple sequence of SAN moves
+ *
+ * @param sequence e.g: 1.e4 e5 2.Nf3
+ * @param moves Returned moves sequence
+ */
+void ParseSANMoves(const std::string &sequence,HalfMove *moves);
+
 } // namespace pgnp