Add FPDF_GetSecurityHandlerRevision

fpdfsdk/src/fpdfview.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 "../include/fsdk_define.h"
 #include "../include/fpdfview.h"
 #include "../include/fsdk_rendercontext.h"
 #include "../include/fpdf_progressive.h"
@@ skipping 322 matching lines @@
 {
         if (document == NULL) return 0;
         CPDF_Document*pDoc = (CPDF_Document*)document;
         CPDF_Parser* pParser =  (CPDF_Parser*)pDoc->GetParser();
         CPDF_Dictionary* pDict = pParser->GetEncryptDict();
         if (pDict == NULL) return (FX_DWORD)-1;
 
         return pDict->GetInteger("P");
 }
 
+DLLEXPORT int STDCALL FPDF_GetSecurityHandlerRevision(FPDF_DOCUMENT document)
+{
+    if (document == NULL) return -1;
+    CPDF_Document*pDoc = (CPDF_Document*)document;
+    CPDF_Parser* pParser = (CPDF_Parser*)pDoc->GetParser();
+    CPDF_Dictionary* pDict = pParser->GetEncryptDict();
+    if (pDict == NULL) return -1;
+
+    return pDict->GetInteger("R");
+}
+
 DLLEXPORT int STDCALL FPDF_GetPageCount(FPDF_DOCUMENT document)
 {
         if (document == NULL) return 0;
         return ((CPDF_Document*)document)->GetPageCount();
 }
 
 DLLEXPORT FPDF_PAGE STDCALL FPDF_LoadPage(FPDF_DOCUMENT document, int page_index)
 {
         if (document == NULL) return NULL;
         if (page_index < 0 || page_index >= FPDF_GetPageCount(document)) return NULL;
@@ skipping 485 matching lines @@
 {
         if (document == NULL)
                 return NULL;
         if (name == NULL || name[0] == 0) 
                 return NULL;
 
         CPDF_Document* pDoc = (CPDF_Document*)document;
         CPDF_NameTree name_tree(pDoc, FX_BSTRC("Dests"));
         return name_tree.LookupNamedDest(pDoc, name);
 }