Auto merge of rust-lang#395 - lemonrock:windows_posix_errors, r=alexcrichton

Adding POSIX 'E' error code constants for Windows

Believe it or not, Windows actually defines a few POSIX
'E' error codes (eg EINVAL). By adding them to libc, the Windows
bindings for things like `read()` become useful.

Author: bors

src/windows.rs

@@ -105,6 +105,47 @@ pub const LC_MONETARY: ::c_int = 3;
 pub const LC_NUMERIC: ::c_int = 4;
 pub const LC_TIME: ::c_int = 5;
 
+pub const EPERM: ::c_int = 1;
+pub const ENOENT: ::c_int = 2;
+pub const ESRCH: ::c_int = 3;
+pub const EINTR: ::c_int = 4;
+pub const EIO: ::c_int = 5;
+pub const ENXIO: ::c_int = 6;
+pub const E2BIG: ::c_int = 7;
+pub const ENOEXEC: ::c_int = 8;
+pub const EBADF: ::c_int = 9;
+pub const ECHILD: ::c_int = 10;
+pub const EAGAIN: ::c_int = 11;
+pub const ENOMEM: ::c_int = 12;
+pub const EACCES: ::c_int = 13;
+pub const EFAULT: ::c_int = 14;
+pub const EBUSY: ::c_int = 16;
+pub const EEXIST: ::c_int = 17;
+pub const EXDEV: ::c_int = 18;
+pub const ENODEV: ::c_int = 19;
+pub const ENOTDIR: ::c_int = 20;
+pub const EISDIR: ::c_int = 21;
+pub const EINVAL: ::c_int = 22;
+pub const ENFILE: ::c_int = 23;
+pub const EMFILE: ::c_int = 24;
+pub const ENOTTY: ::c_int = 25;
+pub const EFBIG: ::c_int = 27;
+pub const ENOSPC: ::c_int = 28;
+pub const ESPIPE: ::c_int = 29;
+pub const EROFS: ::c_int = 30;
+pub const EMLINK: ::c_int = 31;
+pub const EPIPE: ::c_int = 32;
+pub const EDOM: ::c_int = 33;
+pub const ERANGE: ::c_int = 34;
+pub const EDEADLK: ::c_int = 36;
+pub const EDEADLOCK: ::c_int = 36;
+pub const ENAMETOOLONG: ::c_int = 38;
+pub const ENOLCK: ::c_int = 39;
+pub const ENOSYS: ::c_int = 40;
+pub const ENOTEMPTY: ::c_int = 41;
+pub const EILSEQ: ::c_int = 42;
+pub const STRUNCATE: ::c_int = 80;
+
 #[cfg(target_env = "msvc")] // " if " -- appease style checker
 #[link(name = "msvcrt")]
 extern {}