Function dump_hexadecimal

crates/stdlib/src/faulthandler.rs:150–171

(fd: i32, value: u64, width: usize)

    // _Py_DumpHexadecimal (traceback.c)
    #[cfg(any(unix, windows))]
    fn dump_hexadecimal(fd: i32, value: u64, width: usize) {
        const HEX_CHARS: &[u8; 16] = b"0123456789abcdef";
        let mut buf = [0u8; 18]; // "0x" + 16 hex digits
        buf[0] = b'0';
        buf[1] = b'x';

        for i in 0..width {
            let digit = ((value >> (4 * (width - 1 - i))) & 0xf) as usize;
            buf[2 + i] = HEX_CHARS[digit];
        }

        let _ = unsafe {
            #[cfg(windows)]
            {
                libc::write(fd, buf.as_ptr() as *const libc::c_void, (2 + width) as u32)
            }
            #[cfg(not(windows))]
            {
                libc::write(fd, buf.as_ptr() as *const libc::c_void, 2 + width)
            }
        };
    }

    // _Py_DumpDecimal (traceback.c)
    #[cfg(any(unix, windows))]