WIP objdiff 3.0 refactor

objdiff-wasm/src/logging.rs

@@ -0,0 +1,52 @@
+wit_bindgen::generate!({
+    world: "imports",
+    path: "wit/deps/logging",
+});
+
+use alloc::format;
+
+pub use wasi::logging::logging as wasi_logging;
+
+struct WasiLogger;
+
+impl log::Log for WasiLogger {
+    fn enabled(&self, metadata: &log::Metadata) -> bool { metadata.level() <= log::max_level() }
+
+    fn log(&self, record: &log::Record) {
+        if !self.enabled(record.metadata()) {
+            return;
+        }
+        let level = match record.level() {
+            log::Level::Error => wasi_logging::Level::Error,
+            log::Level::Warn => wasi_logging::Level::Warn,
+            log::Level::Info => wasi_logging::Level::Info,
+            log::Level::Debug => wasi_logging::Level::Debug,
+            log::Level::Trace => wasi_logging::Level::Trace,
+        };
+        wasi_logging::log(level, record.target(), &format!("{}", record.args()));
+    }
+
+    fn flush(&self) {}
+}
+
+static LOGGER: WasiLogger = WasiLogger;
+
+pub fn init(level: wasi_logging::Level) {
+    let _ = log::set_logger(&LOGGER);
+    log::set_max_level(match level {
+        wasi_logging::Level::Error => log::LevelFilter::Error,
+        wasi_logging::Level::Warn => log::LevelFilter::Warn,
+        wasi_logging::Level::Info => log::LevelFilter::Info,
+        wasi_logging::Level::Debug => log::LevelFilter::Debug,
+        wasi_logging::Level::Trace => log::LevelFilter::Trace,
+        wasi_logging::Level::Critical => log::LevelFilter::Off,
+    });
+}
+
+#[cfg(not(feature = "std"))]
+#[panic_handler]
+fn panic(info: &core::panic::PanicInfo) -> ! {
+    use alloc::string::ToString;
+    wasi_logging::log(wasi_logging::Level::Critical, "objdiff_core::panic", &info.to_string());
+    core::arch::wasm32::unreachable();
+}