c test program

rawc/Cargo.toml

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+[package]
+name = "rawc"
+version = "0.1.0"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[lib]
+crate-type = ["staticlib", "rlib"]
+
+
+[dependencies]
+libuwuc = { path = "../libuwuc" }

rawc/src/lib.rs

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+#![no_std]
+#![feature(panic_info_message)]
+
+mod stdio;
+mod string;
+
+// libcore seems to require this symbol, even though it's unused.
+#[no_mangle]
+fn rust_eh_personality() {
+    unsafe {
+        libuwuc::trap!();
+    }
+}
+
+#[panic_handler]
+#[cfg(not(test))]
+fn handler(arg: &core::panic::PanicInfo) -> ! {
+    let args = format_args!("<no message>");
+    let payload = arg.message().unwrap_or(&args);
+    libuwuc::io::println!("panicked: {payload}");
+    if let Some(loc) = arg.location() {
+        libuwuc::io::println!("  at {}:{}:{}", loc.file(), loc.line(), loc.column());
+    }
+    libuwuc::start::exit(1);
+}

rawc/src/stdio.rs

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+use core::ffi::c_char;
+
+#[no_mangle]
+pub unsafe extern "C" fn puts(s: *const c_char) -> i32 {
+    libuwuc::io::puts(s)
+}

rawc/src/string.rs

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+#[no_mangle]
+pub unsafe extern "C" fn memset(ptr: *mut u8, constant: u8, len: usize) {
+    libuwuc::mem::memset(ptr, constant, len)
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn memcpy(dest: *mut u8, src: *const u8, size: usize) -> *mut u8 {
+    libuwuc::mem::memcpy(dest, src, size)
+}
+
+#[no_mangle]
+pub unsafe fn memcmp(s1: *const u8, s2: *const u8, size: usize) -> i32 {
+    libuwuc::mem::memcmp(s1, s2, size)
+}
+
+
+#[no_mangle]
+pub unsafe fn bcmp(s1: *const u8, s2: *const u8, size: usize) -> i32 {
+    libuwuc::mem::memcmp(s1, s2, size)
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn strlen(s: *const u8) -> usize {
+    libuwuc::mem::strlen(s)
+}