Isolated emscripten in new lib

lib/emscripten/emtests/test_sscanf_hex.cpp

@@ -0,0 +1,32 @@
+// Copyright 2016 The Emscripten Authors.  All rights reserved.
+// Emscripten is available under two separate licenses, the MIT license and the
+// University of Illinois/NCSA Open Source License.  Both these licenses can be
+// found in the LICENSE file.
+
+#include <stdio.h>
+#include <string>
+#include <cstdlib>
+
+int main()
+{
+  unsigned int a, b;
+  sscanf("0x12AB 12AB", "%x %x", &a, &b);
+  printf("%d %d\n", a, b);
+
+  std::string hexstr("0102037F00FF");
+  const char * cstr = hexstr.c_str();
+  int len = hexstr.length() / 2;
+  char * tmp_data = new char[len];
+  for(int i = 0; i < len; i++)
+  {
+      sscanf(cstr, "%2hhx", &tmp_data[i]);
+      cstr += 2 * sizeof(char);
+  }
+
+  for (int j = 0; j < len; j++)
+      printf("%i, ", tmp_data[j]);
+  printf("\n");
+  delete[] tmp_data;
+}
+
+