| // 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. |
| |
| /// Converts numeric type to a `String` |
| pub fn lexical_to_string<N: lexical_core::ToLexical>(n: N) -> String { |
| let mut buf = Vec::<u8>::with_capacity(N::FORMATTED_SIZE_DECIMAL); |
| unsafe { |
| // JUSTIFICATION |
| // Benefit |
| // Allows using the faster serializer lexical core and convert to string |
| // Soundness |
| // Length of buf is set as written length afterwards. lexical_core |
| // creates a valid string, so doesn't need to be checked. |
| let slice = std::slice::from_raw_parts_mut(buf.as_mut_ptr(), buf.capacity()); |
| let len = lexical_core::write(n, slice).len(); |
| buf.set_len(len); |
| String::from_utf8_unchecked(buf) |
| } |
| } |
