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// Copyright 2019 The Chromium 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 BASE_JSON_JSON_COMMON_H_
#define BASE_JSON_JSON_COMMON_H_
#include <stddef.h>
#include "base/check_op.h"
#include "base/memory/raw_ptr.h"
namespace base {
namespace internal {
// Chosen to support 99.9% of documents found in the wild late 2016.
// http://crbug.com/673263
const size_t kAbsoluteMaxDepth = 200;
// Simple class that checks for maximum recursion/stack overflow.
class StackMarker {
public:
StackMarker(size_t max_depth, size_t* depth)
: max_depth_(max_depth), depth_(depth) {
++(*depth_);
DCHECK_LE(*depth_, max_depth_);
}
StackMarker(const StackMarker&) = delete;
StackMarker& operator=(const StackMarker&) = delete;
~StackMarker() { --(*depth_); }
bool IsTooDeep() const { return *depth_ >= max_depth_; }
private:
const size_t max_depth_;
const raw_ptr<size_t> depth_;
};
} // namespace internal
} // namespace base
#endif // BASE_JSON_JSON_COMMON_H_
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