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// 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 XFA_FXFA_FM2JS_CXFA_FMTOJAVASCRIPTDEPTH_H_
#define XFA_FXFA_FM2JS_CXFA_FMTOJAVASCRIPTDEPTH_H_
class CXFA_FMToJavaScriptDepth {
public:
CXFA_FMToJavaScriptDepth() { depth_++; }
~CXFA_FMToJavaScriptDepth() { depth_--; }
bool IsWithinMaxDepth() const { return depth_ <= kMaxDepth; }
static void Reset();
private:
// Arbitarily picked by looking at how deep a translation got before hitting
// the getting fuzzer memory limits. Should be larger then |kMaxParseDepth| in
// cxfa_fmparser.cpp.
const unsigned long kMaxDepth = 5000;
static unsigned long depth_;
};
#endif // XFA_FXFA_FM2JS_CXFA_FMTOJAVASCRIPTDEPTH_H_
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