131 lines
5.1 KiB
Rust
131 lines
5.1 KiB
Rust
// Copyright 2013 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// FIXME: this file probably shouldn't exist
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#[macro_escape];
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use std::fmt;
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// Indicates whether we should perform expensive sanity checks, including rtassert!
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// FIXME: Once the runtime matures remove the `true` below to turn off rtassert, etc.
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pub static ENFORCE_SANITY: bool = true || !cfg!(rtopt) || cfg!(rtdebug) || cfg!(rtassert);
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macro_rules! rterrln (
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($($arg:tt)*) => ( {
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format_args!(::macros::dumb_println, $($arg)*)
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} )
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)
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// Some basic logging. Enabled by passing `--cfg rtdebug` to the libstd build.
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macro_rules! rtdebug (
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($($arg:tt)*) => ( {
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if cfg!(rtdebug) {
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rterrln!($($arg)*)
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}
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})
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)
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macro_rules! rtassert (
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( $arg:expr ) => ( {
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if ::macros::ENFORCE_SANITY {
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if !$arg {
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rtabort!(" assertion failed: {}", stringify!($arg));
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}
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}
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} )
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)
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macro_rules! rtabort (
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($($arg:tt)*) => ( {
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::macros::abort(format!($($arg)*));
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} )
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)
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pub fn dumb_println(args: &fmt::Arguments) {
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use std::io;
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use std::libc;
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struct Stderr;
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impl io::Writer for Stderr {
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fn write(&mut self, data: &[u8]) -> io::IoResult<()> {
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unsafe {
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libc::write(libc::STDERR_FILENO,
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data.as_ptr() as *libc::c_void,
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data.len() as libc::size_t);
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}
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Ok(()) // just ignore the result
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}
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}
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let mut w = Stderr;
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let _ = fmt::writeln(&mut w as &mut io::Writer, args);
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}
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pub fn abort(msg: &str) -> ! {
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let msg = if !msg.is_empty() { msg } else { "aborted" };
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let hash = msg.chars().fold(0, |accum, val| accum + (val as uint) );
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let quote = match hash % 10 {
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0 => "
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It was from the artists and poets that the pertinent answers came, and I
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know that panic would have broken loose had they been able to compare notes.
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As it was, lacking their original letters, I half suspected the compiler of
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having asked leading questions, or of having edited the correspondence in
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corroboration of what he had latently resolved to see.",
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1 => "
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There are not many persons who know what wonders are opened to them in the
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stories and visions of their youth; for when as children we listen and dream,
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we think but half-formed thoughts, and when as men we try to remember, we are
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dulled and prosaic with the poison of life. But some of us awake in the night
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with strange phantasms of enchanted hills and gardens, of fountains that sing
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in the sun, of golden cliffs overhanging murmuring seas, of plains that stretch
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down to sleeping cities of bronze and stone, and of shadowy companies of heroes
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that ride caparisoned white horses along the edges of thick forests; and then
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we know that we have looked back through the ivory gates into that world of
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wonder which was ours before we were wise and unhappy.",
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2 => "
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Instead of the poems I had hoped for, there came only a shuddering blackness
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and ineffable loneliness; and I saw at last a fearful truth which no one had
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ever dared to breathe before — the unwhisperable secret of secrets — The fact
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that this city of stone and stridor is not a sentient perpetuation of Old New
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York as London is of Old London and Paris of Old Paris, but that it is in fact
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quite dead, its sprawling body imperfectly embalmed and infested with queer
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animate things which have nothing to do with it as it was in life.",
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3 => "
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The ocean ate the last of the land and poured into the smoking gulf, thereby
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giving up all it had ever conquered. From the new-flooded lands it flowed
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again, uncovering death and decay; and from its ancient and immemorial bed it
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trickled loathsomely, uncovering nighted secrets of the years when Time was
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young and the gods unborn. Above the waves rose weedy remembered spires. The
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moon laid pale lilies of light on dead London, and Paris stood up from its damp
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grave to be sanctified with star-dust. Then rose spires and monoliths that were
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weedy but not remembered; terrible spires and monoliths of lands that men never
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knew were lands...",
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4 => "
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There was a night when winds from unknown spaces whirled us irresistibly into
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limitless vacuum beyond all thought and entity. Perceptions of the most
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maddeningly untransmissible sort thronged upon us; perceptions of infinity
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which at the time convulsed us with joy, yet which are now partly lost to my
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memory and partly incapable of presentation to others.",
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_ => "You've met with a terrible fate, haven't you?"
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};
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rterrln!("{}", "");
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rterrln!("{}", quote);
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rterrln!("{}", "");
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rterrln!("fatal runtime error: {}", msg);
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abort();
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fn abort() -> ! {
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use std::intrinsics;
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unsafe { intrinsics::abort() }
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}
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}
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