Added test for util.printx() and make it match spec.

fpdfsdk/javascript/PublicMethods.cpp

 // Copyright 2014 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "fpdfsdk/javascript/PublicMethods.h"
 
 #include <algorithm>
 #include <string>
@@ skipping 1422 matching lines @@
   CFX_WideString& Value = pEvent->Value();
   std::string strSrc = CFX_ByteString::FromUnicode(Value).c_str();
 
   switch (iIndex) {
     case 0:
       cFormat = "99999";
       break;
     case 1:
       cFormat = "99999-9999";
       break;
-    case 2: {
-      std::string NumberStr;
-      util::printx("9999999999", strSrc, NumberStr);
-      if (NumberStr.length() >= 10)
+    case 2:
+      if (util::printx("9999999999", strSrc).length() >= 10)
         cFormat = "(999) 999-9999";
       else
         cFormat = "999-9999";
       break;
-    }
     case 3:
       cFormat = "999-99-9999";
       break;
   }
 
-  std::string strDes;
-  util::printx(cFormat, strSrc, strDes);
-  Value = CFX_WideString::FromLocal(strDes.c_str());
+  Value = CFX_WideString::FromLocal(util::printx(cFormat, strSrc).c_str());
   return TRUE;
 }
 
 // function AFSpecial_KeystrokeEx(mask)
 FX_BOOL CJS_PublicMethods::AFSpecial_KeystrokeEx(
     IJS_Context* cc,
     const std::vector<CJS_Value>& params,
     CJS_Value& vRet,
     CFX_WideString& sError) {
   CJS_Context* pContext = (CJS_Context*)cc;
@@ skipping 101 matching lines @@
   int iIndex = params[0].ToInt();
   CFX_WideString& val = pEvent->Value();
   std::string strSrc = CFX_ByteString::FromUnicode(val).c_str();
   std::wstring wstrChange = pEvent->Change().c_str();
 
   switch (iIndex) {
     case 0:
       cFormat = "99999";
       break;
     case 1:
-      // cFormat = "99999-9999";
       cFormat = "999999999";
       break;
-    case 2: {
-      std::string NumberStr;
-      util::printx("9999999999", strSrc, NumberStr);
+    case 2:
       if (strSrc.length() + wstrChange.length() > 7)
-        // cFormat = "(999) 999-9999";
         cFormat = "9999999999";
       else
-        // cFormat = "999-9999";
         cFormat = "9999999";
       break;
-    }
     case 3:
-      // cFormat = "999-99-9999";
       cFormat = "999999999";
       break;
   }
 
   std::vector<CJS_Value> params2;
   params2.push_back(CJS_Value(CJS_Runtime::FromContext(cc), cFormat.c_str()));
   return AFSpecial_KeystrokeEx(cc, params2, vRet, sError);
 }
 
 FX_BOOL CJS_PublicMethods::AFMergeChange(IJS_Context* cc,
@@ skipping 283 matching lines @@
     nums.SetElement(nIndex, CJS_Value(pRuntime, sPart.c_str()));
   }
 
   if (nums.GetLength() > 0)
     vRet = nums;
   else
     vRet.SetNull();
 
   return TRUE;
 }