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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 "mongo/bson/generator_extended_canonical_2_0_0.h"
#include "mongo/bson/util/builder.h"
#include "mongo/util/str.h"
#include <fmt/format.h>
namespace mongo {
class LegacyStrictGenerator : private ExtendedCanonicalV200Generator {
public:
using ExtendedCanonicalV200Generator::writeBool;
using ExtendedCanonicalV200Generator::writeNull;
void writeUndefined(fmt::memory_buffer& buffer) const {
appendTo(buffer, R"({ "$undefined" : true })"_sd);
}
void writeString(fmt::memory_buffer& buffer, StringData str) const {
fmt::format_to(buffer, R"("{}")", str::escape(str));
}
void writeSymbol(fmt::memory_buffer& buffer, StringData symbol) const {
writeString(buffer, symbol);
}
void writeInt32(fmt::memory_buffer& buffer, int32_t val) const {
writeDouble(buffer, val);
}
void writeInt64(fmt::memory_buffer& buffer, int64_t val) const {
fmt::format_to(buffer, R"({{ "$numberLong" : "{}" }})", val);
}
void writeDouble(fmt::memory_buffer& buffer, double val) const {
if (val >= std::numeric_limits<double>::lowest() &&
val <= std::numeric_limits<double>::max())
fmt::format_to(buffer, R"({:.16g})", val);
else if (std::isnan(val))
appendTo(buffer, "NaN"_sd);
else if (std::isinf(val)) {
if (val > 0)
appendTo(buffer, "Infinity"_sd);
else
appendTo(buffer, "-Infinity"_sd);
} else {
StringBuilder ss;
ss << "Number " << val << " cannot be represented in JSON";
uassert(10311, ss.str(), false);
}
}
void writeDecimal128(fmt::memory_buffer& buffer, Decimal128 val) const {
if (val.isNaN())
appendTo(buffer, R"({ "$numberDecimal" : "NaN" })"_sd);
else if (val.isInfinite())
fmt::format_to(buffer,
R"({{ "$numberDecimal" : "{}" }})",
val.isNegative() ? "-Infinity"_sd : "Infinity"_sd);
else {
fmt::format_to(buffer, R"({{ "$numberDecimal" : "{}" }})", val.toString());
}
}
void writeDate(fmt::memory_buffer& buffer, Date_t val) const {
// The two cases in which we cannot convert Date_t::millis to an ISO Date string are
// when the date is too large to format (SERVER-13760), and when the date is before
// the epoch (SERVER-11273). Since Date_t internally stores millis as an unsigned
// long long, despite the fact that it is logically signed (SERVER-8573), this check
// handles both the case where Date_t::millis is too large, and the case where
// Date_t::millis is negative (before the epoch).
if (val.isFormattable()) {
fmt::format_to(buffer, R"({{ "$date" : "{}" }})", dateToISOStringLocal(val));
} else {
fmt::format_to(
buffer, R"({{ "$date" : {{ "$numberLong" : "{}" }} }})", val.toMillisSinceEpoch());
}
}
void writeDBRef(fmt::memory_buffer& buffer, StringData ref, OID id) const {
fmt::format_to(buffer, R"({{ "$ref" : "{}", "$id" : "{}" }})", ref, id.toString());
}
void writeOID(fmt::memory_buffer& buffer, OID val) const {
fmt::format_to(buffer, R"({{ "$oid" : "{}" }})", val.toString());
}
void writeBinData(fmt::memory_buffer& buffer, StringData data, BinDataType type) const {
appendTo(buffer, R"({ "$binary" : ")");
base64::encode(buffer, data);
fmt::format_to(buffer, R"(", "$type" : "{:02x}" }})", type);
}
void writeRegex(fmt::memory_buffer& buffer, StringData pattern, StringData options) const {
fmt::format_to(
buffer, R"({{ "$regex" : "{}", "$options" : "{}" }})", str::escape(pattern), options);
}
void writeCode(fmt::memory_buffer& buffer, StringData code) const {
fmt::format_to(buffer, R"({{ "$code" : "{}" }})", str::escape(code));
}
void writeCodeWithScope(fmt::memory_buffer& buffer,
StringData code,
BSONObj const& scope) const {
fmt::format_to(buffer, R"({{ "$code" : "{}", "$scope" : )", str::escape(code));
scope.jsonStringGenerator(*this, 0, false, buffer);
appendTo(buffer, R"( })");
}
void writeTimestamp(fmt::memory_buffer& buffer, Timestamp val) const {
fmt::format_to(buffer,
R"({{ "$timestamp" : {{ "t" : {}, "i" : {} }} }})",
val.getSecs(),
val.getInc());
}
void writeMinKey(fmt::memory_buffer& buffer) const {
appendTo(buffer, R"({ "$minKey" : 1 })"_sd);
}
void writeMaxKey(fmt::memory_buffer& buffer) const {
appendTo(buffer, R"({ "$maxKey" : 1 })"_sd);
}
void writePadding(fmt::memory_buffer& buffer) const {
buffer.push_back(' ');
}
};
} // namespace mongo
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