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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the Server Side Public License in all respects for
* all of the code used other than as permitted herein. If you modify file(s)
* with this exception, you may extend this exception to your version of the
* file(s), but you are not obligated to do so. If you do not wish to do so,
* delete this exception statement from your version. If you delete this
* exception statement from all source files in the program, then also delete
* it in the license file.
*/
#pragma once
#include <array>
#include <ostream>
#include "mongo/base/string_data.h"
#include "mongo/bson/bsonelement.h"
#include "mongo/util/stacktrace.h"
namespace mongo::stack_trace_detail {
/**
* A utility for uint64_t <=> uppercase hex string conversions. It
* can be used to produce a StringData.
*
* sink << Hex(x); // as a temporary
*
* Hex hx(x);
* StringData sd = hx; // sd storage is in `hx`.
*/
class Hex {
public:
using Buf = std::array<char, 18>; // 64/4 hex digits plus potential "0x"
static StringData toHex(uint64_t x, Buf& buf, bool showBase = false);
static uint64_t fromHex(StringData s);
explicit Hex(uint64_t x, bool showBase = false) : _str{toHex(x, _buf, showBase)} {}
explicit Hex(const void* x, bool showBase = false)
: Hex{reinterpret_cast<uintptr_t>(x), showBase} {}
operator StringData() const {
return _str;
}
private:
Buf _buf;
StringData _str;
};
class Dec {
public:
using Buf = std::array<char, 20>; // ceil(64*log10(2))
static StringData toDec(uint64_t x, Buf& buf);
static uint64_t fromDec(StringData s);
explicit Dec(uint64_t x) : _str(toDec(x, _buf)) {}
operator StringData() const {
return _str;
}
private:
Buf _buf;
StringData _str;
};
} // namespace mongo::stack_trace_detail
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