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// Copyright © 2017-2018 Mozilla Foundation
//
// This program is made available under an ISC-style license. See the
// accompanying file LICENSE for details.
#[macro_export]
macro_rules! cubeb_log_internal {
($level: expr, $msg: expr) => {
#[allow(unused_unsafe)]
unsafe {
if $level <= $crate::ffi::g_cubeb_log_level.into() {
cubeb_log_internal!(__INTERNAL__ $msg);
}
}
};
($level: expr, $fmt: expr, $($arg: expr),+) => {
#[allow(unused_unsafe)]
unsafe {
if $level <= $crate::ffi::g_cubeb_log_level.into() {
cubeb_log_internal!(__INTERNAL__ format!($fmt, $($arg),*));
}
}
};
(__INTERNAL__ $msg: expr) => {
if let Some(log_callback) = $crate::ffi::g_cubeb_log_callback {
use std::io::Write;
let mut buf = [0 as u8; 1024];
let filename = std::path::Path::new(file!())
.file_name()
.unwrap()
.to_str()
.unwrap();
// 2 for ':', 1 for ' ', 1 for '\n', and 1 for converting `line!()` to number of digits
let len = filename.len() + ((line!() as f32).log10().trunc() as usize) + $msg.len() + 5;
debug_assert!(len < buf.len(), "log will be truncated");
let _ = write!(&mut buf[..], "{}:{}: {}\n", filename, line!(), $msg);
let last = std::cmp::min(len, buf.len() - 1);
buf[last] = 0;
let cstr = unsafe { std::ffi::CStr::from_bytes_with_nul_unchecked(&buf[..=last]) };
log_callback(cstr.as_ptr());
}
}
}
#[macro_export]
macro_rules! cubeb_logv {
($msg: expr) => (cubeb_log_internal!($crate::LogLevel::Verbose, $msg));
($fmt: expr, $($arg: expr),+) => (cubeb_log_internal!($crate::LogLevel::Verbose, $fmt, $($arg),*));
}
#[macro_export]
macro_rules! cubeb_log {
($msg: expr) => (cubeb_log_internal!($crate::LogLevel::Normal, $msg));
($fmt: expr, $($arg: expr),+) => (cubeb_log_internal!($crate::LogLevel::Normal, $fmt, $($arg),*));
}
#[cfg(test)]
mod tests {
#[test]
fn test_normal_logging() {
cubeb_log!("This is log at normal level");
cubeb_log!("{} Formatted log", 1);
cubeb_log!("{} Formatted {} log {}", 1, 2, 3);
}
#[test]
fn test_verbose_logging() {
cubeb_logv!("This is a log at verbose level");
cubeb_logv!("{} Formatted log", 1);
cubeb_logv!("{} Formatted {} log {}", 1, 2, 3);
}
}
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