Make FDF document creation return unique_ptrs

Review-Url: https://codereview.chromium.org/2538533003

4 files changed, 31 insertions, 22 deletions

diff --git a/core/fpdfapi/parser/cfdf_document.cpp b/core/fpdfapi/parser/cfdf_document.cpp
index 546308c3a3..41e285245d 100644
--- a/core/fpdfapi/parser/cfdf_document.cpp
+++ b/core/fpdfapi/parser/cfdf_document.cpp
@@ -25,24 +25,26 @@ CFDF_Document::~CFDF_Document() {
     m_pFile->Release();
 }
 
-CFDF_Document* CFDF_Document::CreateNewDoc() {
-  CFDF_Document* pDoc = new CFDF_Document;
+std::unique_ptr<CFDF_Document> CFDF_Document::CreateNewDoc() {
+  auto pDoc = pdfium::MakeUnique<CFDF_Document>();
   pDoc->m_pRootDict = pDoc->NewIndirect<CPDF_Dictionary>();
   pDoc->m_pRootDict->SetNewFor<CPDF_Dictionary>("FDF");
   return pDoc;
 }
 
-CFDF_Document* CFDF_Document::ParseFile(IFX_SeekableReadStream* pFile,
-                                        bool bOwnFile) {
+std::unique_ptr<CFDF_Document> CFDF_Document::ParseFile(
+    IFX_SeekableReadStream* pFile,
+    bool bOwnFile) {
   if (!pFile)
     return nullptr;
 
-  std::unique_ptr<CFDF_Document> pDoc(new CFDF_Document);
+  auto pDoc = pdfium::MakeUnique<CFDF_Document>();
   pDoc->ParseStream(pFile, bOwnFile);
-  return pDoc->m_pRootDict ? pDoc.release() : nullptr;
+  return pDoc->m_pRootDict ? std::move(pDoc) : nullptr;
 }
 
-CFDF_Document* CFDF_Document::ParseMemory(const uint8_t* pData, uint32_t size) {
+std::unique_ptr<CFDF_Document> CFDF_Document::ParseMemory(const uint8_t* pData,
+                                                          uint32_t size) {
   return CFDF_Document::ParseFile(FX_CreateMemoryStream((uint8_t*)pData, size),
                                   true);
 }
diff --git a/core/fpdfapi/parser/cfdf_document.h b/core/fpdfapi/parser/cfdf_document.h
index 075119376f..1b47368458 100644
--- a/core/fpdfapi/parser/cfdf_document.h
+++ b/core/fpdfapi/parser/cfdf_document.h
@@ -7,6 +7,8 @@
 #ifndef CORE_FPDFAPI_PARSER_CFDF_DOCUMENT_H_
 #define CORE_FPDFAPI_PARSER_CFDF_DOCUMENT_H_
 
+#include <memory>
+
 #include "core/fpdfapi/parser/cpdf_indirect_object_holder.h"
 #include "core/fpdfapi/parser/cpdf_object.h"
 #include "core/fxcrt/fx_basic.h"
@@ -15,17 +17,19 @@ class CPDF_Dictionary;
 
 class CFDF_Document : public CPDF_IndirectObjectHolder {
  public:
-  static CFDF_Document* CreateNewDoc();
-  static CFDF_Document* ParseFile(IFX_SeekableReadStream* pFile,
-                                  bool bOwnFile = false);
-  static CFDF_Document* ParseMemory(const uint8_t* pData, uint32_t size);
+  static std::unique_ptr<CFDF_Document> CreateNewDoc();
+  static std::unique_ptr<CFDF_Document> ParseFile(IFX_SeekableReadStream* pFile,
+                                                  bool bOwnFile = false);
+  static std::unique_ptr<CFDF_Document> ParseMemory(const uint8_t* pData,
+                                                    uint32_t size);
+
+  CFDF_Document();
   ~CFDF_Document() override;
 
   bool WriteBuf(CFX_ByteTextBuf& buf) const;
   CPDF_Dictionary* GetRoot() const { return m_pRootDict; }
 
  protected:
-  CFDF_Document();
   void ParseStream(IFX_SeekableReadStream* pFile, bool bOwnFile);
 
   CPDF_Dictionary* m_pRootDict;
diff --git a/core/fpdfdoc/cpdf_interform.cpp b/core/fpdfdoc/cpdf_interform.cpp
index 00365c7224..c323986603 100644
--- a/core/fpdfdoc/cpdf_interform.cpp
+++ b/core/fpdfdoc/cpdf_interform.cpp
@@ -1185,8 +1185,9 @@ CPDF_FormField* CPDF_InterForm::CheckRequiredFields(
   return nullptr;
 }
 
-CFDF_Document* CPDF_InterForm::ExportToFDF(const CFX_WideStringC& pdf_path,
-                                           bool bSimpleFileSpec) const {
+std::unique_ptr<CFDF_Document> CPDF_InterForm::ExportToFDF(
+    const CFX_WideStringC& pdf_path,
+    bool bSimpleFileSpec) const {
   std::vector<CPDF_FormField*> fields;
   size_t nCount = m_pFieldTree->m_Root.CountFields();
   for (size_t i = 0; i < nCount; ++i)
@@ -1194,12 +1195,12 @@ CFDF_Document* CPDF_InterForm::ExportToFDF(const CFX_WideStringC& pdf_path,
   return ExportToFDF(pdf_path, fields, true, bSimpleFileSpec);
 }
 
-CFDF_Document* CPDF_InterForm::ExportToFDF(
+std::unique_ptr<CFDF_Document> CPDF_InterForm::ExportToFDF(
     const CFX_WideStringC& pdf_path,
     const std::vector<CPDF_FormField*>& fields,
     bool bIncludeOrExclude,
     bool bSimpleFileSpec) const {
-  CFDF_Document* pDoc = CFDF_Document::CreateNewDoc();
+  std::unique_ptr<CFDF_Document> pDoc = CFDF_Document::CreateNewDoc();
   if (!pDoc)
     return nullptr;
 
diff --git a/core/fpdfdoc/cpdf_interform.h b/core/fpdfdoc/cpdf_interform.h
index fbff0289a1..f03ffb1e60 100644
--- a/core/fpdfdoc/cpdf_interform.h
+++ b/core/fpdfdoc/cpdf_interform.h
@@ -73,12 +73,14 @@ class CPDF_InterForm {
       const std::vector<CPDF_FormField*>* fields,
       bool bIncludeOrExclude) const;
 
-  CFDF_Document* ExportToFDF(const CFX_WideStringC& pdf_path,
-                             bool bSimpleFileSpec) const;
-  CFDF_Document* ExportToFDF(const CFX_WideStringC& pdf_path,
-                             const std::vector<CPDF_FormField*>& fields,
-                             bool bIncludeOrExclude,
-                             bool bSimpleFileSpec) const;
+  std::unique_ptr<CFDF_Document> ExportToFDF(const CFX_WideStringC& pdf_path,
+                                             bool bSimpleFileSpec) const;
+
+  std::unique_ptr<CFDF_Document> ExportToFDF(
+      const CFX_WideStringC& pdf_path,
+      const std::vector<CPDF_FormField*>& fields,
+      bool bIncludeOrExclude,
+      bool bSimpleFileSpec) const;
 
   bool ResetForm(const std::vector<CPDF_FormField*>& fields,
                  bool bIncludeOrExclude,