| // Licensed to the Apache Software Foundation (ASF) under one |
| // or more contributor license agreements. See the NOTICE file |
| // distributed with this work for additional information |
| // regarding copyright ownership. The ASF licenses this file |
| // to you under the Apache License, Version 2.0 (the |
| // "License"); you may not use this file except in compliance |
| // with the License. You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, |
| // software distributed under the License is distributed on an |
| // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| // KIND, either express or implied. See the License for the |
| // specific language governing permissions and limitations |
| // under the License. |
| |
| #ifndef PARQUET_UTIL_COMPARISON_H |
| #define PARQUET_UTIL_COMPARISON_H |
| |
| #include <algorithm> |
| |
| #include "parquet/schema.h" |
| #include "parquet/types.h" |
| |
| namespace parquet { |
| |
| template <typename T> |
| struct Compare { |
| explicit Compare(const ColumnDescriptor* descr) : type_length_(descr->type_length()) {} |
| |
| inline bool operator()(const T& a, const T& b) { return a < b; } |
| |
| private: |
| int32_t type_length_; |
| }; |
| |
| template <> |
| inline bool Compare<Int96>::operator()(const Int96& a, const Int96& b) { |
| return std::lexicographical_compare(a.value, a.value + 3, b.value, b.value + 3); |
| } |
| |
| template <> |
| inline bool Compare<ByteArray>::operator()(const ByteArray& a, const ByteArray& b) { |
| auto aptr = reinterpret_cast<const int8_t*>(a.ptr); |
| auto bptr = reinterpret_cast<const int8_t*>(b.ptr); |
| return std::lexicographical_compare(aptr, aptr + a.len, bptr, bptr + b.len); |
| } |
| |
| template <> |
| inline bool Compare<FLBA>::operator()(const FLBA& a, const FLBA& b) { |
| auto aptr = reinterpret_cast<const int8_t*>(a.ptr); |
| auto bptr = reinterpret_cast<const int8_t*>(b.ptr); |
| return std::lexicographical_compare( |
| aptr, aptr + type_length_, bptr, bptr + type_length_); |
| } |
| |
| } // namespace parquet |
| |
| #endif // PARQUET_UTIL_COMPARISON_H |