1//===---------------------------- system_error ------------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9//
10// This was lifted from libc++ and modified for C++03. This is called
11// system_error even though it does not define that class because that's what
12// it's called in C++0x. We don't define system_error because it is only used
13// for exception handling, which we don't use in LLVM.
14//
15//===----------------------------------------------------------------------===//
16
17#ifndef LLVM_SUPPORT_SYSTEM_ERROR_H
18#define LLVM_SUPPORT_SYSTEM_ERROR_H
19
20#include "llvm/Support/Compiler.h"
21
22/*
23    system_error synopsis
24
25namespace std
26{
27
28class error_category
29{
30public:
31    virtual ~error_category();
32
33    error_category(const error_category&) = delete;
34    error_category& operator=(const error_category&) = delete;
35
36    virtual const char* name() const = 0;
37    virtual error_condition default_error_condition(int ev) const;
38    virtual bool equivalent(int code, const error_condition& condition) const;
39    virtual bool equivalent(const error_code& code, int condition) const;
40    virtual std::string message(int ev) const = 0;
41
42    bool operator==(const error_category& rhs) const;
43    bool operator!=(const error_category& rhs) const;
44    bool operator<(const error_category& rhs) const;
45};
46
47const error_category& generic_category();
48const error_category& system_category();
49
50template <class T> struct is_error_code_enum
51    : public false_type {};
52
53template <class T> struct is_error_condition_enum
54    : public false_type {};
55
56class error_code
57{
58public:
59    // constructors:
60    error_code();
61    error_code(int val, const error_category& cat);
62    template <class ErrorCodeEnum>
63        error_code(ErrorCodeEnum e);
64
65    // modifiers:
66    void assign(int val, const error_category& cat);
67    template <class ErrorCodeEnum>
68        error_code& operator=(ErrorCodeEnum e);
69    void clear();
70
71    // observers:
72    int value() const;
73    const error_category& category() const;
74    error_condition default_error_condition() const;
75    std::string message() const;
76    explicit operator bool() const;
77};
78
79// non-member functions:
80bool operator<(const error_code& lhs, const error_code& rhs);
81template <class charT, class traits>
82    basic_ostream<charT,traits>&
83    operator<<(basic_ostream<charT,traits>& os, const error_code& ec);
84
85class error_condition
86{
87public:
88    // constructors:
89    error_condition();
90    error_condition(int val, const error_category& cat);
91    template <class ErrorConditionEnum>
92        error_condition(ErrorConditionEnum e);
93
94    // modifiers:
95    void assign(int val, const error_category& cat);
96    template <class ErrorConditionEnum>
97        error_condition& operator=(ErrorConditionEnum e);
98    void clear();
99
100    // observers:
101    int value() const;
102    const error_category& category() const;
103    std::string message() const;
104    explicit operator bool() const;
105};
106
107bool operator<(const error_condition& lhs, const error_condition& rhs);
108
109class system_error
110    : public runtime_error
111{
112public:
113    system_error(error_code ec, const std::string& what_arg);
114    system_error(error_code ec, const char* what_arg);
115    system_error(error_code ec);
116    system_error(int ev, const error_category& ecat, const std::string& what_arg);
117    system_error(int ev, const error_category& ecat, const char* what_arg);
118    system_error(int ev, const error_category& ecat);
119
120    const error_code& code() const throw();
121    const char* what() const throw();
122};
123
124enum class errc
125{
126    address_family_not_supported,       // EAFNOSUPPORT
127    address_in_use,                     // EADDRINUSE
128    address_not_available,              // EADDRNOTAVAIL
129    already_connected,                  // EISCONN
130    argument_list_too_long,             // E2BIG
131    argument_out_of_domain,             // EDOM
132    bad_address,                        // EFAULT
133    bad_file_descriptor,                // EBADF
134    bad_message,                        // EBADMSG
135    broken_pipe,                        // EPIPE
136    connection_aborted,                 // ECONNABORTED
137    connection_already_in_progress,     // EALREADY
138    connection_refused,                 // ECONNREFUSED
139    connection_reset,                   // ECONNRESET
140    cross_device_link,                  // EXDEV
141    destination_address_required,       // EDESTADDRREQ
142    device_or_resource_busy,            // EBUSY
143    directory_not_empty,                // ENOTEMPTY
144    executable_format_error,            // ENOEXEC
145    file_exists,                        // EEXIST
146    file_too_large,                     // EFBIG
147    filename_too_long,                  // ENAMETOOLONG
148    function_not_supported,             // ENOSYS
149    host_unreachable,                   // EHOSTUNREACH
150    identifier_removed,                 // EIDRM
151    illegal_byte_sequence,              // EILSEQ
152    inappropriate_io_control_operation, // ENOTTY
153    interrupted,                        // EINTR
154    invalid_argument,                   // EINVAL
155    invalid_seek,                       // ESPIPE
156    io_error,                           // EIO
157    is_a_directory,                     // EISDIR
158    message_size,                       // EMSGSIZE
159    network_down,                       // ENETDOWN
160    network_reset,                      // ENETRESET
161    network_unreachable,                // ENETUNREACH
162    no_buffer_space,                    // ENOBUFS
163    no_child_process,                   // ECHILD
164    no_link,                            // ENOLINK
165    no_lock_available,                  // ENOLCK
166    no_message_available,               // ENODATA
167    no_message,                         // ENOMSG
168    no_protocol_option,                 // ENOPROTOOPT
169    no_space_on_device,                 // ENOSPC
170    no_stream_resources,                // ENOSR
171    no_such_device_or_address,          // ENXIO
172    no_such_device,                     // ENODEV
173    no_such_file_or_directory,          // ENOENT
174    no_such_process,                    // ESRCH
175    not_a_directory,                    // ENOTDIR
176    not_a_socket,                       // ENOTSOCK
177    not_a_stream,                       // ENOSTR
178    not_connected,                      // ENOTCONN
179    not_enough_memory,                  // ENOMEM
180    not_supported,                      // ENOTSUP
181    operation_canceled,                 // ECANCELED
182    operation_in_progress,              // EINPROGRESS
183    operation_not_permitted,            // EPERM
184    operation_not_supported,            // EOPNOTSUPP
185    operation_would_block,              // EWOULDBLOCK
186    owner_dead,                         // EOWNERDEAD
187    permission_denied,                  // EACCES
188    protocol_error,                     // EPROTO
189    protocol_not_supported,             // EPROTONOSUPPORT
190    read_only_file_system,              // EROFS
191    resource_deadlock_would_occur,      // EDEADLK
192    resource_unavailable_try_again,     // EAGAIN
193    result_out_of_range,                // ERANGE
194    state_not_recoverable,              // ENOTRECOVERABLE
195    stream_timeout,                     // ETIME
196    text_file_busy,                     // ETXTBSY
197    timed_out,                          // ETIMEDOUT
198    too_many_files_open_in_system,      // ENFILE
199    too_many_files_open,                // EMFILE
200    too_many_links,                     // EMLINK
201    too_many_symbolic_link_levels,      // ELOOP
202    value_too_large,                    // EOVERFLOW
203    wrong_protocol_type                 // EPROTOTYPE
204};
205
206template <> struct is_error_condition_enum<errc> : true_type { }
207
208error_code make_error_code(errc e);
209error_condition make_error_condition(errc e);
210
211// Comparison operators:
212bool operator==(const error_code& lhs, const error_code& rhs);
213bool operator==(const error_code& lhs, const error_condition& rhs);
214bool operator==(const error_condition& lhs, const error_code& rhs);
215bool operator==(const error_condition& lhs, const error_condition& rhs);
216bool operator!=(const error_code& lhs, const error_code& rhs);
217bool operator!=(const error_code& lhs, const error_condition& rhs);
218bool operator!=(const error_condition& lhs, const error_code& rhs);
219bool operator!=(const error_condition& lhs, const error_condition& rhs);
220
221template <> struct hash<std::error_code>;
222
223}  // std
224
225*/
226
227#include "llvm/Config/llvm-config.h"
228#include "llvm/Support/type_traits.h"
229#include <cerrno>
230#include <string>
231
232// This must be here instead of a .inc file because it is used in the definition
233// of the enum values below.
234#ifdef LLVM_ON_WIN32
235
236  // The following numbers were taken from VS2010.
237# ifndef EAFNOSUPPORT
238#   define EAFNOSUPPORT 102
239# endif
240# ifndef EADDRINUSE
241#   define EADDRINUSE 100
242# endif
243# ifndef EADDRNOTAVAIL
244#   define EADDRNOTAVAIL 101
245# endif
246# ifndef EISCONN
247#   define EISCONN 113
248# endif
249# ifndef E2BIG
250#   define E2BIG 7
251# endif
252# ifndef EDOM
253#   define EDOM 33
254# endif
255# ifndef EFAULT
256#   define EFAULT 14
257# endif
258# ifndef EBADF
259#   define EBADF 9
260# endif
261# ifndef EBADMSG
262#   define EBADMSG 104
263# endif
264# ifndef EPIPE
265#   define EPIPE 32
266# endif
267# ifndef ECONNABORTED
268#   define ECONNABORTED 106
269# endif
270# ifndef EALREADY
271#   define EALREADY 103
272# endif
273# ifndef ECONNREFUSED
274#   define ECONNREFUSED 107
275# endif
276# ifndef ECONNRESET
277#   define ECONNRESET 108
278# endif
279# ifndef EXDEV
280#   define EXDEV 18
281# endif
282# ifndef EDESTADDRREQ
283#   define EDESTADDRREQ 109
284# endif
285# ifndef EBUSY
286#   define EBUSY 16
287# endif
288# ifndef ENOTEMPTY
289#   define ENOTEMPTY 41
290# endif
291# ifndef ENOEXEC
292#   define ENOEXEC 8
293# endif
294# ifndef EEXIST
295#   define EEXIST 17
296# endif
297# ifndef EFBIG
298#   define EFBIG 27
299# endif
300# ifndef ENAMETOOLONG
301#   define ENAMETOOLONG 38
302# endif
303# ifndef ENOSYS
304#   define ENOSYS 40
305# endif
306# ifndef EHOSTUNREACH
307#   define EHOSTUNREACH 110
308# endif
309# ifndef EIDRM
310#   define EIDRM 111
311# endif
312# ifndef EILSEQ
313#   define EILSEQ 42
314# endif
315# ifndef ENOTTY
316#   define ENOTTY 25
317# endif
318# ifndef EINTR
319#   define EINTR 4
320# endif
321# ifndef EINVAL
322#   define EINVAL 22
323# endif
324# ifndef ESPIPE
325#   define ESPIPE 29
326# endif
327# ifndef EIO
328#   define EIO 5
329# endif
330# ifndef EISDIR
331#   define EISDIR 21
332# endif
333# ifndef EMSGSIZE
334#   define EMSGSIZE 115
335# endif
336# ifndef ENETDOWN
337#   define ENETDOWN 116
338# endif
339# ifndef ENETRESET
340#   define ENETRESET 117
341# endif
342# ifndef ENETUNREACH
343#   define ENETUNREACH 118
344# endif
345# ifndef ENOBUFS
346#   define ENOBUFS 119
347# endif
348# ifndef ECHILD
349#   define ECHILD 10
350# endif
351# ifndef ENOLINK
352#   define ENOLINK 121
353# endif
354# ifndef ENOLCK
355#   define ENOLCK 39
356# endif
357# ifndef ENODATA
358#   define ENODATA 120
359# endif
360# ifndef ENOMSG
361#   define ENOMSG 122
362# endif
363# ifndef ENOPROTOOPT
364#   define ENOPROTOOPT 123
365# endif
366# ifndef ENOSPC
367#   define ENOSPC 28
368# endif
369# ifndef ENOSR
370#   define ENOSR 124
371# endif
372# ifndef ENXIO
373#   define ENXIO 6
374# endif
375# ifndef ENODEV
376#   define ENODEV 19
377# endif
378# ifndef ENOENT
379#   define ENOENT 2
380# endif
381# ifndef ESRCH
382#   define ESRCH 3
383# endif
384# ifndef ENOTDIR
385#   define ENOTDIR 20
386# endif
387# ifndef ENOTSOCK
388#   define ENOTSOCK 128
389# endif
390# ifndef ENOSTR
391#   define ENOSTR 125
392# endif
393# ifndef ENOTCONN
394#   define ENOTCONN 126
395# endif
396# ifndef ENOMEM
397#   define ENOMEM 12
398# endif
399# ifndef ENOTSUP
400#   define ENOTSUP 129
401# endif
402# ifndef ECANCELED
403#   define ECANCELED 105
404# endif
405# ifndef EINPROGRESS
406#   define EINPROGRESS 112
407# endif
408# ifndef EPERM
409#   define EPERM 1
410# endif
411# ifndef EOPNOTSUPP
412#   define EOPNOTSUPP 130
413# endif
414# ifndef EWOULDBLOCK
415#   define EWOULDBLOCK 140
416# endif
417# ifndef EOWNERDEAD
418#   define EOWNERDEAD 133
419# endif
420# ifndef EACCES
421#   define EACCES 13
422# endif
423# ifndef EPROTO
424#   define EPROTO 134
425# endif
426# ifndef EPROTONOSUPPORT
427#   define EPROTONOSUPPORT 135
428# endif
429# ifndef EROFS
430#   define EROFS 30
431# endif
432# ifndef EDEADLK
433#   define EDEADLK 36
434# endif
435# ifndef EAGAIN
436#   define EAGAIN 11
437# endif
438# ifndef ERANGE
439#   define ERANGE 34
440# endif
441# ifndef ENOTRECOVERABLE
442#   define ENOTRECOVERABLE 127
443# endif
444# ifndef ETIME
445#   define ETIME 137
446# endif
447# ifndef ETXTBSY
448#   define ETXTBSY 139
449# endif
450# ifndef ETIMEDOUT
451#   define ETIMEDOUT 138
452# endif
453# ifndef ENFILE
454#   define ENFILE 23
455# endif
456# ifndef EMFILE
457#   define EMFILE 24
458# endif
459# ifndef EMLINK
460#   define EMLINK 31
461# endif
462# ifndef ELOOP
463#   define ELOOP 114
464# endif
465# ifndef EOVERFLOW
466#   define EOVERFLOW 132
467# endif
468# ifndef EPROTOTYPE
469#   define EPROTOTYPE 136
470# endif
471#endif
472
473namespace llvm {
474
475// is_error_code_enum
476
477template <class Tp> struct is_error_code_enum : public false_type {};
478
479// is_error_condition_enum
480
481template <class Tp> struct is_error_condition_enum : public false_type {};
482
483// Some error codes are not present on all platforms, so we provide equivalents
484// for them:
485
486//enum class errc
487struct errc {
488enum _ {
489  success                             = 0,
490  address_family_not_supported        = EAFNOSUPPORT,
491  address_in_use                      = EADDRINUSE,
492  address_not_available               = EADDRNOTAVAIL,
493  already_connected                   = EISCONN,
494  argument_list_too_long              = E2BIG,
495  argument_out_of_domain              = EDOM,
496  bad_address                         = EFAULT,
497  bad_file_descriptor                 = EBADF,
498#ifdef EBADMSG
499  bad_message                         = EBADMSG,
500#else
501  bad_message                         = EINVAL,
502#endif
503  broken_pipe                         = EPIPE,
504  connection_aborted                  = ECONNABORTED,
505  connection_already_in_progress      = EALREADY,
506  connection_refused                  = ECONNREFUSED,
507  connection_reset                    = ECONNRESET,
508  cross_device_link                   = EXDEV,
509  destination_address_required        = EDESTADDRREQ,
510  device_or_resource_busy             = EBUSY,
511  directory_not_empty                 = ENOTEMPTY,
512  executable_format_error             = ENOEXEC,
513  file_exists                         = EEXIST,
514  file_too_large                      = EFBIG,
515  filename_too_long                   = ENAMETOOLONG,
516  function_not_supported              = ENOSYS,
517  host_unreachable                    = EHOSTUNREACH,
518  identifier_removed                  = EIDRM,
519  illegal_byte_sequence               = EILSEQ,
520  inappropriate_io_control_operation  = ENOTTY,
521  interrupted                         = EINTR,
522  invalid_argument                    = EINVAL,
523  invalid_seek                        = ESPIPE,
524  io_error                            = EIO,
525  is_a_directory                      = EISDIR,
526  message_size                        = EMSGSIZE,
527  network_down                        = ENETDOWN,
528  network_reset                       = ENETRESET,
529  network_unreachable                 = ENETUNREACH,
530  no_buffer_space                     = ENOBUFS,
531  no_child_process                    = ECHILD,
532#ifdef ENOLINK
533  no_link                             = ENOLINK,
534#else
535  no_link                             = EINVAL,
536#endif
537  no_lock_available                   = ENOLCK,
538#ifdef ENODATA
539  no_message_available                = ENODATA,
540#else
541  no_message_available                = ENOMSG,
542#endif
543  no_message                          = ENOMSG,
544  no_protocol_option                  = ENOPROTOOPT,
545  no_space_on_device                  = ENOSPC,
546#ifdef ENOSR
547  no_stream_resources                 = ENOSR,
548#else
549  no_stream_resources                 = ENOMEM,
550#endif
551  no_such_device_or_address           = ENXIO,
552  no_such_device                      = ENODEV,
553  no_such_file_or_directory           = ENOENT,
554  no_such_process                     = ESRCH,
555  not_a_directory                     = ENOTDIR,
556  not_a_socket                        = ENOTSOCK,
557#ifdef ENOSTR
558  not_a_stream                        = ENOSTR,
559#else
560  not_a_stream                        = EINVAL,
561#endif
562  not_connected                       = ENOTCONN,
563  not_enough_memory                   = ENOMEM,
564  not_supported                       = ENOTSUP,
565#ifdef ECANCELED
566  operation_canceled                  = ECANCELED,
567#else
568  operation_canceled                  = EINVAL,
569#endif
570  operation_in_progress               = EINPROGRESS,
571  operation_not_permitted             = EPERM,
572  operation_not_supported             = EOPNOTSUPP,
573  operation_would_block               = EWOULDBLOCK,
574#ifdef EOWNERDEAD
575  owner_dead                          = EOWNERDEAD,
576#else
577  owner_dead                          = EINVAL,
578#endif
579  permission_denied                   = EACCES,
580#ifdef EPROTO
581  protocol_error                      = EPROTO,
582#else
583  protocol_error                      = EINVAL,
584#endif
585  protocol_not_supported              = EPROTONOSUPPORT,
586  read_only_file_system               = EROFS,
587  resource_deadlock_would_occur       = EDEADLK,
588  resource_unavailable_try_again      = EAGAIN,
589  result_out_of_range                 = ERANGE,
590#ifdef ENOTRECOVERABLE
591  state_not_recoverable               = ENOTRECOVERABLE,
592#else
593  state_not_recoverable               = EINVAL,
594#endif
595#ifdef ETIME
596  stream_timeout                      = ETIME,
597#else
598  stream_timeout                      = ETIMEDOUT,
599#endif
600  text_file_busy                      = ETXTBSY,
601  timed_out                           = ETIMEDOUT,
602  too_many_files_open_in_system       = ENFILE,
603  too_many_files_open                 = EMFILE,
604  too_many_links                      = EMLINK,
605  too_many_symbolic_link_levels       = ELOOP,
606  value_too_large                     = EOVERFLOW,
607  wrong_protocol_type                 = EPROTOTYPE
608};
609
610  _ v_;
611
612  errc(_ v) : v_(v) {}
613  operator int() const {return v_;}
614};
615
616template <> struct is_error_condition_enum<errc> : true_type { };
617
618template <> struct is_error_condition_enum<errc::_> : true_type { };
619
620class error_condition;
621class error_code;
622
623// class error_category
624
625class _do_message;
626
627class error_category
628{
629public:
630  virtual ~error_category();
631
632private:
633  error_category();
634  error_category(const error_category&) LLVM_DELETED_FUNCTION;
635  error_category& operator=(const error_category&) LLVM_DELETED_FUNCTION;
636
637public:
638  virtual const char* name() const = 0;
639  virtual error_condition default_error_condition(int _ev) const;
640  virtual bool equivalent(int _code, const error_condition& _condition) const;
641  virtual bool equivalent(const error_code& _code, int _condition) const;
642  virtual std::string message(int _ev) const = 0;
643
644  bool operator==(const error_category& _rhs) const {return this == &_rhs;}
645
646  bool operator!=(const error_category& _rhs) const {return !(*this == _rhs);}
647
648  bool operator< (const error_category& _rhs) const {return this < &_rhs;}
649
650  friend class _do_message;
651};
652
653class _do_message : public error_category
654{
655public:
656  virtual std::string message(int ev) const LLVM_OVERRIDE;
657};
658
659const error_category& generic_category();
660const error_category& system_category();
661
662/// Get the error_category used for errno values from POSIX functions. This is
663/// the same as the system_category on POSIX systems, but is the same as the
664/// generic_category on Windows.
665const error_category& posix_category();
666
667class error_condition
668{
669  int _val_;
670  const error_category* _cat_;
671public:
672  error_condition() : _val_(0), _cat_(&generic_category()) {}
673
674  error_condition(int _val, const error_category& _cat)
675    : _val_(_val), _cat_(&_cat) {}
676
677  template <class E>
678  error_condition(E _e, typename enable_if_c<
679                          is_error_condition_enum<E>::value
680                        >::type* = 0)
681    {*this = make_error_condition(_e);}
682
683  void assign(int _val, const error_category& _cat) {
684    _val_ = _val;
685    _cat_ = &_cat;
686  }
687
688  template <class E>
689    typename enable_if_c
690    <
691      is_error_condition_enum<E>::value,
692      error_condition&
693    >::type
694    operator=(E _e)
695      {*this = make_error_condition(_e); return *this;}
696
697  void clear() {
698    _val_ = 0;
699    _cat_ = &generic_category();
700  }
701
702  int value() const {return _val_;}
703
704  const error_category& category() const {return *_cat_;}
705  std::string message() const;
706
707  typedef void (*unspecified_bool_type)();
708  static void unspecified_bool_true() {}
709
710  operator unspecified_bool_type() const { // true if error
711    return _val_ == 0 ? 0 : unspecified_bool_true;
712  }
713};
714
715inline error_condition make_error_condition(errc _e) {
716  return error_condition(static_cast<int>(_e), generic_category());
717}
718
719inline bool operator<(const error_condition& _x, const error_condition& _y) {
720  return _x.category() < _y.category()
721      || (_x.category() == _y.category() && _x.value() < _y.value());
722}
723
724// error_code
725
726class error_code {
727  int _val_;
728  const error_category* _cat_;
729public:
730  error_code() : _val_(0), _cat_(&system_category()) {}
731
732  static error_code success() {
733    return error_code();
734  }
735
736  error_code(int _val, const error_category& _cat)
737    : _val_(_val), _cat_(&_cat) {}
738
739  template <class E>
740  error_code(E _e, typename enable_if_c<
741                     is_error_code_enum<E>::value
742                   >::type* = 0) {
743    *this = make_error_code(_e);
744  }
745
746  void assign(int _val, const error_category& _cat) {
747      _val_ = _val;
748      _cat_ = &_cat;
749  }
750
751  template <class E>
752    typename enable_if_c
753    <
754      is_error_code_enum<E>::value,
755      error_code&
756    >::type
757    operator=(E _e)
758      {*this = make_error_code(_e); return *this;}
759
760  void clear() {
761    _val_ = 0;
762    _cat_ = &system_category();
763  }
764
765  int value() const {return _val_;}
766
767  const error_category& category() const {return *_cat_;}
768
769  error_condition default_error_condition() const
770    {return _cat_->default_error_condition(_val_);}
771
772  std::string message() const;
773
774  typedef void (*unspecified_bool_type)();
775  static void unspecified_bool_true() {}
776
777  operator unspecified_bool_type() const { // true if error
778    return _val_ == 0 ? 0 : unspecified_bool_true;
779  }
780};
781
782inline error_code make_error_code(errc _e) {
783  return error_code(static_cast<int>(_e), generic_category());
784}
785
786inline bool operator<(const error_code& _x, const error_code& _y) {
787  return _x.category() < _y.category()
788      || (_x.category() == _y.category() && _x.value() < _y.value());
789}
790
791inline bool operator==(const error_code& _x, const error_code& _y) {
792  return _x.category() == _y.category() && _x.value() == _y.value();
793}
794
795inline bool operator==(const error_code& _x, const error_condition& _y) {
796  return _x.category().equivalent(_x.value(), _y)
797      || _y.category().equivalent(_x, _y.value());
798}
799
800inline bool operator==(const error_condition& _x, const error_code& _y) {
801  return _y == _x;
802}
803
804inline bool operator==(const error_condition& _x, const error_condition& _y) {
805   return _x.category() == _y.category() && _x.value() == _y.value();
806}
807
808inline bool operator!=(const error_code& _x, const error_code& _y) {
809  return !(_x == _y);
810}
811
812inline bool operator!=(const error_code& _x, const error_condition& _y) {
813  return !(_x == _y);
814}
815
816inline bool operator!=(const error_condition& _x, const error_code& _y) {
817  return !(_x == _y);
818}
819
820inline bool operator!=(const error_condition& _x, const error_condition& _y) {
821  return !(_x == _y);
822}
823
824// Windows errors.
825
826//  To construct an error_code after an API error:
827//
828//      error_code( ::GetLastError(), system_category() )
829struct windows_error {
830enum _ {
831  success = 0,
832  // These names and values are based on Windows WinError.h
833  // This is not a complete list. Add to this list if you need to explicitly
834  // check for it.
835  invalid_function        = 1, // ERROR_INVALID_FUNCTION,
836  file_not_found          = 2, // ERROR_FILE_NOT_FOUND,
837  path_not_found          = 3, // ERROR_PATH_NOT_FOUND,
838  too_many_open_files     = 4, // ERROR_TOO_MANY_OPEN_FILES,
839  access_denied           = 5, // ERROR_ACCESS_DENIED,
840  invalid_handle          = 6, // ERROR_INVALID_HANDLE,
841  arena_trashed           = 7, // ERROR_ARENA_TRASHED,
842  not_enough_memory       = 8, // ERROR_NOT_ENOUGH_MEMORY,
843  invalid_block           = 9, // ERROR_INVALID_BLOCK,
844  bad_environment         = 10, // ERROR_BAD_ENVIRONMENT,
845  bad_format              = 11, // ERROR_BAD_FORMAT,
846  invalid_access          = 12, // ERROR_INVALID_ACCESS,
847  outofmemory             = 14, // ERROR_OUTOFMEMORY,
848  invalid_drive           = 15, // ERROR_INVALID_DRIVE,
849  current_directory       = 16, // ERROR_CURRENT_DIRECTORY,
850  not_same_device         = 17, // ERROR_NOT_SAME_DEVICE,
851  no_more_files           = 18, // ERROR_NO_MORE_FILES,
852  write_protect           = 19, // ERROR_WRITE_PROTECT,
853  bad_unit                = 20, // ERROR_BAD_UNIT,
854  not_ready               = 21, // ERROR_NOT_READY,
855  bad_command             = 22, // ERROR_BAD_COMMAND,
856  crc                     = 23, // ERROR_CRC,
857  bad_length              = 24, // ERROR_BAD_LENGTH,
858  seek                    = 25, // ERROR_SEEK,
859  not_dos_disk            = 26, // ERROR_NOT_DOS_DISK,
860  sector_not_found        = 27, // ERROR_SECTOR_NOT_FOUND,
861  out_of_paper            = 28, // ERROR_OUT_OF_PAPER,
862  write_fault             = 29, // ERROR_WRITE_FAULT,
863  read_fault              = 30, // ERROR_READ_FAULT,
864  gen_failure             = 31, // ERROR_GEN_FAILURE,
865  sharing_violation       = 32, // ERROR_SHARING_VIOLATION,
866  lock_violation          = 33, // ERROR_LOCK_VIOLATION,
867  wrong_disk              = 34, // ERROR_WRONG_DISK,
868  sharing_buffer_exceeded = 36, // ERROR_SHARING_BUFFER_EXCEEDED,
869  handle_eof              = 38, // ERROR_HANDLE_EOF,
870  handle_disk_full        = 39, // ERROR_HANDLE_DISK_FULL,
871  rem_not_list            = 51, // ERROR_REM_NOT_LIST,
872  dup_name                = 52, // ERROR_DUP_NAME,
873  bad_net_path            = 53, // ERROR_BAD_NETPATH,
874  network_busy            = 54, // ERROR_NETWORK_BUSY,
875  file_exists             = 80, // ERROR_FILE_EXISTS,
876  cannot_make             = 82, // ERROR_CANNOT_MAKE,
877  broken_pipe             = 109, // ERROR_BROKEN_PIPE,
878  open_failed             = 110, // ERROR_OPEN_FAILED,
879  buffer_overflow         = 111, // ERROR_BUFFER_OVERFLOW,
880  disk_full               = 112, // ERROR_DISK_FULL,
881  insufficient_buffer     = 122, // ERROR_INSUFFICIENT_BUFFER,
882  lock_failed             = 167, // ERROR_LOCK_FAILED,
883  busy                    = 170, // ERROR_BUSY,
884  cancel_violation        = 173, // ERROR_CANCEL_VIOLATION,
885  already_exists          = 183  // ERROR_ALREADY_EXISTS
886};
887  _ v_;
888
889  windows_error(_ v) : v_(v) {}
890  explicit windows_error(int v) : v_(_(v)) {}
891  operator int() const {return v_;}
892};
893
894
895template <> struct is_error_code_enum<windows_error> : true_type { };
896
897template <> struct is_error_code_enum<windows_error::_> : true_type { };
898
899inline error_code make_error_code(windows_error e) {
900  return error_code(static_cast<int>(e), system_category());
901}
902
903} // end namespace llvm
904
905#endif
906