libphobos/src/std/system.d

   1 // Written in the D programming language.
   2
   3 /**
   4  * Information about the target operating system, environment, and CPU.
   5  *
   6  *  Copyright: Copyright Digital Mars 2000 - 2011
   7  *  License:   $(HTTP www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
   8  *  Authors:   $(HTTP digitalmars.com, Walter Bright) and Jonathan M Davis
   9  *  Source:    $(PHOBOSSRC std/_system.d)
  10  */
  11 module std.system;
  12
  13 immutable
  14 {
  15     /++
  16         Operating system.
  17
  18         Note:
  19             This is for cases where you need a value representing the OS at
  20             runtime. If you're doing something which should compile differently
  21             on different OSes, then please use $(D version (Windows)),
  22             $(D version (linux)), etc.
  23
  24         See_Also:
  25             $(DDSUBLINK spec/version,PredefinedVersions, Predefined Versions)
  26       +/
  27     enum OS
  28     {
  29         win32 = 1, /// Microsoft 32 bit Windows systems
  30         win64,     /// Microsoft 64 bit Windows systems
  31         linux,     /// All Linux Systems, except for Android
  32         osx,       /// Mac OS X
  33         freeBSD,   /// FreeBSD
  34         netBSD,    /// NetBSD
  35         dragonFlyBSD, /// DragonFlyBSD
  36         solaris,   /// Solaris
  37         android,   /// Android
  38         otherPosix /// Other Posix Systems
  39     }
  40
  41     /// The OS that the program was compiled for.
  42     version (Win32)        OS os = OS.win32;
  43     else version (Win64)   OS os = OS.win64;
  44     else version (Android) OS os = OS.android;
  45     else version (linux)   OS os = OS.linux;
  46     else version (OSX)     OS os = OS.osx;
  47     else version (FreeBSD) OS os = OS.freeBSD;
  48     else version (NetBSD)  OS os = OS.netBSD;
  49     else version (DragonFlyBSD) OS os = OS.dragonFlyBSD;
  50     else version (Posix)   OS os = OS.otherPosix;
  51     else static assert(0, "Unknown OS.");
  52
  53     /++
  54         Byte order endianness.
  55
  56         Note:
  57             This is intended for cases where you need to deal with endianness at
  58             runtime. If you're doing something which should compile differently
  59             depending on whether you're compiling on a big endian or little
  60             endian machine, then please use $(D version (BigEndian)) and
  61             $(D version (LittleEndian)).
  62
  63         See_Also:
  64             $(DDSUBLINK spec/version,PredefinedVersions, Predefined Versions)
  65       +/
  66     enum Endian
  67     {
  68         bigEndian,   /// Big endian byte order
  69         littleEndian /// Little endian byte order
  70     }
  71
  72     /// The endianness that the program was compiled for.
  73     version (LittleEndian) Endian endian = Endian.littleEndian;
  74     else                  Endian endian = Endian.bigEndian;
  75 }
  76