| // 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. |
| |
| #include "arrow/util/value_parsing.h" |
| |
| #include <string> |
| #include <utility> |
| |
| #include "arrow/vendored/fast_float/fast_float.h" |
| |
| namespace arrow { |
| namespace internal { |
| |
| bool StringToFloat(const char* s, size_t length, float* out) { |
| const auto res = ::arrow_vendored::fast_float::from_chars(s, s + length, *out); |
| return res.ec == std::errc() && res.ptr == s + length; |
| } |
| |
| bool StringToFloat(const char* s, size_t length, double* out) { |
| const auto res = ::arrow_vendored::fast_float::from_chars(s, s + length, *out); |
| return res.ec == std::errc() && res.ptr == s + length; |
| } |
| |
| // ---------------------------------------------------------------------- |
| // strptime-like parsing |
| |
| namespace { |
| |
| class StrptimeTimestampParser : public TimestampParser { |
| public: |
| explicit StrptimeTimestampParser(std::string format) : format_(std::move(format)) {} |
| |
| bool operator()(const char* s, size_t length, TimeUnit::type out_unit, |
| int64_t* out) const override { |
| return ParseTimestampStrptime(s, length, format_.c_str(), |
| /*ignore_time_in_day=*/false, |
| /*allow_trailing_chars=*/false, out_unit, out); |
| } |
| |
| const char* kind() const override { return "strptime"; } |
| |
| const char* format() const override { return format_.c_str(); } |
| |
| private: |
| std::string format_; |
| }; |
| |
| class ISO8601Parser : public TimestampParser { |
| public: |
| ISO8601Parser() {} |
| |
| bool operator()(const char* s, size_t length, TimeUnit::type out_unit, |
| int64_t* out) const override { |
| return ParseTimestampISO8601(s, length, out_unit, out); |
| } |
| |
| const char* kind() const override { return "iso8601"; } |
| }; |
| |
| } // namespace |
| } // namespace internal |
| |
| const char* TimestampParser::format() const { return ""; } |
| |
| std::shared_ptr<TimestampParser> TimestampParser::MakeStrptime(std::string format) { |
| return std::make_shared<internal::StrptimeTimestampParser>(std::move(format)); |
| } |
| |
| std::shared_ptr<TimestampParser> TimestampParser::MakeISO8601() { |
| return std::make_shared<internal::ISO8601Parser>(); |
| } |
| |
| } // namespace arrow |