Introduce unique_ptr compatible deleters for FPDF typeschromium/3044

Pre-requisite for easily fixing some leaks in sample code,
fuzzers, etc.

Kill off some types completely unused in the C API.

Change-Id: I67f0a5c6eef63d8e062ca4bc97c9db03970fe337
Reviewed-on: https://pdfium-review.googlesource.com/3095
Reviewed-by: dsinclair <dsinclair@chromium.org>
Commit-Queue: Tom Sepez <tsepez@chromium.org>

1 files changed, 41 insertions, 0 deletions

diff --git a/public/cpp/fpdf_deleters.h b/public/cpp/fpdf_deleters.h
new file mode 100644
index 0000000000..6754902a77
--- /dev/null
+++ b/public/cpp/fpdf_deleters.h
@@ -0,0 +1,41 @@
+// Copyright 2017 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.
+
+#ifndef PUBLIC_CPP_FPDF_DELETERS_H_
+#define PUBLIC_CPP_FPDF_DELETERS_H_
+
+#include "public/fpdf_dataavail.h"
+#include "public/fpdf_formfill.h"
+#include "public/fpdf_text.h"
+#include "public/fpdfview.h"
+
+// Custom deleters for using FPDF_* types with std::unique_ptr<>.
+
+struct FPDFAvailDeleter {
+  inline void operator()(FPDF_AVAIL avail) { FPDFAvail_Destroy(avail); }
+};
+
+struct FPDFBitmapDeleter {
+  inline void operator()(FPDF_BITMAP bitmap) { FPDFBitmap_Destroy(bitmap); }
+};
+
+struct FPDFDocumentDeleter {
+  inline void operator()(FPDF_DOCUMENT doc) { FPDF_CloseDocument(doc); }
+};
+
+struct FPDFFormHandleDeleter {
+  inline void operator()(FPDF_FORMHANDLE form) {
+    FPDFDOC_ExitFormFillEnvironment(form);
+  }
+};
+
+struct FPDFTextPageDeleter {
+  inline void operator()(FPDF_TEXTPAGE text) { FPDFText_ClosePage(text); }
+};
+
+struct FPDFPageDeleter {
+  inline void operator()(FPDF_PAGE page) { FPDF_ClosePage(page); }
+};
+
+#endif  // PUBLIC_CPP_FPDF_DELETERS_H_