|
| 1 | +// |
| 2 | +// Copyright (c) 2025 Contributors to the Eclipse Foundation |
| 3 | +// |
| 4 | +// See the NOTICE file(s) distributed with this work for additional |
| 5 | +// information regarding copyright ownership. |
| 6 | +// |
| 7 | +// This program and the accompanying materials are made available under the |
| 8 | +// terms of the Apache License Version 2.0 which is available at |
| 9 | +// <https://www.apache.org/licenses/LICENSE-2.0> |
| 10 | +// |
| 11 | +// SPDX-License-Identifier: Apache-2.0 |
| 12 | +// |
| 13 | + |
| 14 | +use core::fmt::Write; |
| 15 | +use mw_log::fmt::{write, Error, FormatSpec, Result as FmtResult, ScoreWrite}; |
| 16 | +use mw_log::{max_level, Log, Metadata, Record}; |
| 17 | + |
| 18 | +struct StringWriter { |
| 19 | + buffer: String, |
| 20 | +} |
| 21 | + |
| 22 | +impl StringWriter { |
| 23 | + pub fn new() -> Self { |
| 24 | + Self { buffer: String::new() } |
| 25 | + } |
| 26 | + |
| 27 | + pub fn get(&self) -> &str { |
| 28 | + self.buffer.as_str() |
| 29 | + } |
| 30 | +} |
| 31 | + |
| 32 | +impl ScoreWrite for StringWriter { |
| 33 | + fn write_bool(&mut self, v: &bool, _spec: &FormatSpec) -> FmtResult { |
| 34 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 35 | + } |
| 36 | + |
| 37 | + fn write_f32(&mut self, v: &f32, _spec: &FormatSpec) -> FmtResult { |
| 38 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 39 | + } |
| 40 | + |
| 41 | + fn write_f64(&mut self, v: &f64, _spec: &FormatSpec) -> FmtResult { |
| 42 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 43 | + } |
| 44 | + |
| 45 | + fn write_i8(&mut self, v: &i8, _spec: &FormatSpec) -> FmtResult { |
| 46 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 47 | + } |
| 48 | + |
| 49 | + fn write_i16(&mut self, v: &i16, _spec: &FormatSpec) -> FmtResult { |
| 50 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 51 | + } |
| 52 | + |
| 53 | + fn write_i32(&mut self, v: &i32, _spec: &FormatSpec) -> FmtResult { |
| 54 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 55 | + } |
| 56 | + |
| 57 | + fn write_i64(&mut self, v: &i64, _spec: &FormatSpec) -> FmtResult { |
| 58 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 59 | + } |
| 60 | + |
| 61 | + fn write_u8(&mut self, v: &u8, _spec: &FormatSpec) -> FmtResult { |
| 62 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 63 | + } |
| 64 | + |
| 65 | + fn write_u16(&mut self, v: &u16, _spec: &FormatSpec) -> FmtResult { |
| 66 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 67 | + } |
| 68 | + |
| 69 | + fn write_u32(&mut self, v: &u32, _spec: &FormatSpec) -> FmtResult { |
| 70 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 71 | + } |
| 72 | + |
| 73 | + fn write_u64(&mut self, v: &u64, _spec: &FormatSpec) -> FmtResult { |
| 74 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 75 | + } |
| 76 | + |
| 77 | + fn write_str(&mut self, v: &str, _spec: &FormatSpec) -> FmtResult { |
| 78 | + write!(self.buffer, "{}", v).map_err(|_| Error) |
| 79 | + } |
| 80 | +} |
| 81 | + |
| 82 | +pub struct ExampleLogger; |
| 83 | + |
| 84 | +impl Log for ExampleLogger { |
| 85 | + fn enabled(&self, metadata: &Metadata) -> bool { |
| 86 | + metadata.level() <= max_level() |
| 87 | + } |
| 88 | + |
| 89 | + fn context(&self) -> &str { |
| 90 | + "EXAMPLE" |
| 91 | + } |
| 92 | + |
| 93 | + fn log(&self, record: &Record) { |
| 94 | + if !self.enabled(record.metadata()) { |
| 95 | + return; |
| 96 | + } |
| 97 | + |
| 98 | + // Create writer and write log data. |
| 99 | + let mut writer = StringWriter::new(); |
| 100 | + let _ = write(&mut writer, *record.args()); |
| 101 | + |
| 102 | + // Show to stderr. |
| 103 | + eprintln!("{}", writer.get()); |
| 104 | + } |
| 105 | + |
| 106 | + fn flush(&self) { |
| 107 | + // No-op. |
| 108 | + } |
| 109 | +} |
0 commit comments