9e960f4c4f
Currently, there are some useless includes in the codebase. We can use a tool named include-what-you-use to optimize these includes. By using a strict include-what-you-use policy, we can get lots of benefits from it.
61 lines
2.5 KiB
C++
61 lines
2.5 KiB
C++
// Licensed to the Apache Software Foundation (ASF) under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing,
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// software distributed under the License is distributed on an
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// "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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// KIND, either express or implied. See the License for the
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// specific language governing permissions and limitations
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// under the License.
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// This file is copied from
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// https://github.com/apache/impala/blob/branch-2.9.0/be/src/exprs/math-functions.h
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// and modified by Doris
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#pragma once
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#include <stdint.h>
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#include "util/string_parser.hpp"
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#include "vec/common/string_ref.h"
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namespace doris {
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class FunctionContext;
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class MathFunctions {
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public:
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static double my_double_round(double value, int64_t dec, bool dec_unsigned, bool truncate);
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// Converts src_num in decimal to dest_base,
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// and fills expr_val.string_val with the result.
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static doris::StringRef decimal_to_base(doris::FunctionContext* ctx, int64_t src_num,
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int8_t dest_base);
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// Converts src_num representing a number in src_base but encoded in decimal
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// into its actual decimal number.
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// For example, if src_num is 21 and src_base is 5,
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// then this function sets *result to 2*5^1 + 1*5^0 = 11.
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// Returns false if overflow occurred, true upon success.
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static bool decimal_in_base_to_decimal(int64_t src_num, int8_t src_base, int64_t* result);
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// Helper function used in Conv to implement behavior consistent
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// with MySQL and Hive in case of numeric overflow during Conv.
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// Inspects parse_res, and in case of overflow sets num to MAXINT64 if dest_base
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// is positive, otherwise to -1.
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// Returns true if no parse_res == PARSE_SUCCESS || parse_res == PARSE_OVERFLOW.
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// Returns false otherwise, indicating some other error condition.
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static bool handle_parse_result(int8_t dest_base, int64_t* num,
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StringParser::ParseResult parse_res);
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static constexpr int32_t MIN_BASE = 2;
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static constexpr int32_t MAX_BASE = 36;
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};
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} // namespace doris
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