mingw/lib/gcc/mingw32/4.4.0/include/c++/debug/formatter.h

   1 // Debug-mode error formatting implementation -*- C++ -*-
   2
   3 // Copyright (C) 2003, 2004, 2005, 2006, 2007, 2009 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // Under Section 7 of GPL version 3, you are granted additional
  17 // permissions described in the GCC Runtime Library Exception, version
  18 // 3.1, as published by the Free Software Foundation.
  19
  20 // You should have received a copy of the GNU General Public License and
  21 // a copy of the GCC Runtime Library Exception along with this program;
  22 // see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
  23 // <http://www.gnu.org/licenses/>.
  24
  25 /** @file debug/formatter.h
  26  *  This file is a GNU debug extension to the Standard C++ Library.
  27  */
  28
  29 #ifndef _GLIBCXX_DEBUG_FORMATTER_H
  30 #define _GLIBCXX_DEBUG_FORMATTER_H 1
  31
  32 #include <typeinfo>
  33 #include <debug/debug.h>
  34
  35 namespace __gnu_debug
  36 {
  37   using std::type_info;
  38
  39   /** Determine if the two types are the same. */
  40   template<typename _Type1, typename _Type2>
  41     struct __is_same
  42     {
  43       static const bool value = false;
  44     };
  45
  46   template<typename _Type>
  47     struct __is_same<_Type, _Type>
  48     {
  49       static const bool value = true;
  50     };
  51
  52   template<bool> struct __truth { };
  53
  54   class _Safe_sequence_base;
  55
  56   template<typename _Iterator, typename _Sequence>
  57     class _Safe_iterator;
  58
  59   template<typename _Sequence>
  60     class _Safe_sequence;
  61
  62   enum _Debug_msg_id
  63   {
  64     // General checks
  65     __msg_valid_range,
  66     __msg_insert_singular,
  67     __msg_insert_different,
  68     __msg_erase_bad,
  69     __msg_erase_different,
  70     __msg_subscript_oob,
  71     __msg_empty,
  72     __msg_unpartitioned,
  73     __msg_unpartitioned_pred,
  74     __msg_unsorted,
  75     __msg_unsorted_pred,
  76     __msg_not_heap,
  77     __msg_not_heap_pred,
  78     // std::bitset checks
  79     __msg_bad_bitset_write,
  80     __msg_bad_bitset_read,
  81     __msg_bad_bitset_flip,
  82     // std::list checks
  83     __msg_self_splice,
  84     __msg_splice_alloc,
  85     __msg_splice_bad,
  86     __msg_splice_other,
  87     __msg_splice_overlap,
  88     // iterator checks
  89     __msg_init_singular,
  90     __msg_init_copy_singular,
  91     __msg_init_const_singular,
  92     __msg_copy_singular,
  93     __msg_bad_deref,
  94     __msg_bad_inc,
  95     __msg_bad_dec,
  96     __msg_iter_subscript_oob,
  97     __msg_advance_oob,
  98     __msg_retreat_oob,
  99     __msg_iter_compare_bad,
 100     __msg_compare_different,
 101     __msg_iter_order_bad,
 102     __msg_order_different,
 103     __msg_distance_bad,
 104     __msg_distance_different,
 105     // istream_iterator
 106     __msg_deref_istream,
 107     __msg_inc_istream,
 108     // ostream_iterator
 109     __msg_output_ostream,
 110     // istreambuf_iterator
 111     __msg_deref_istreambuf,
 112     __msg_inc_istreambuf
 113   };
 114
 115   class _Error_formatter
 116   {
 117     /// Whether an iterator is constant, mutable, or unknown
 118     enum _Constness
 119     {
 120       __unknown_constness,
 121       __const_iterator,
 122       __mutable_iterator,
 123       __last_constness
 124     };
 125
 126     // The state of the iterator (fine-grained), if we know it.
 127     enum _Iterator_state
 128     {
 129       __unknown_state,
 130       __singular,      // singular, may still be attached to a sequence
 131       __begin,         // dereferenceable, and at the beginning
 132       __middle,        // dereferenceable, not at the beginning
 133       __end,           // past-the-end, may be at beginning if sequence empty
 134       __last_state
 135     };
 136
 137     // Tags denoting the type of parameter for construction
 138     struct _Is_iterator { };
 139     struct _Is_sequence { };
 140
 141     // A parameter that may be referenced by an error message
 142     struct _Parameter
 143     {
 144       enum
 145       {
 146         __unused_param,
 147         __iterator,
 148         __sequence,
 149         __integer,
 150         __string
 151       } _M_kind;
 152
 153       union
 154       {
 155         // When _M_kind == __iterator
 156         struct
 157         {
 158           const char*      _M_name;
 159           const void*      _M_address;
 160           const type_info* _M_type;
 161           _Constness       _M_constness;
 162           _Iterator_state  _M_state;
 163           const void*      _M_sequence;
 164           const type_info* _M_seq_type;
 165         } _M_iterator;
 166
 167         // When _M_kind == __sequence
 168         struct
 169         {
 170           const char*      _M_name;
 171           const void*      _M_address;
 172           const type_info* _M_type;
 173         } _M_sequence;
 174
 175         // When _M_kind == __integer
 176         struct
 177         {
 178           const char* _M_name;
 179           long        _M_value;
 180         } _M_integer;
 181
 182         // When _M_kind == __string
 183         struct
 184         {
 185           const char* _M_name;
 186           const char* _M_value;
 187         } _M_string;
 188       } _M_variant;
 189
 190       _Parameter() : _M_kind(__unused_param), _M_variant() { }
 191
 192       _Parameter(long __value, const char* __name)
 193       : _M_kind(__integer), _M_variant()
 194       {
 195         _M_variant._M_integer._M_name = __name;
 196         _M_variant._M_integer._M_value = __value;
 197       }
 198
 199       _Parameter(const char* __value, const char* __name)
 200       : _M_kind(__string), _M_variant()
 201       {
 202         _M_variant._M_string._M_name = __name;
 203         _M_variant._M_string._M_value = __value;
 204       }
 205
 206       template<typename _Iterator, typename _Sequence>
 207         _Parameter(const _Safe_iterator<_Iterator, _Sequence>& __it,
 208                    const char* __name, _Is_iterator)
 209         : _M_kind(__iterator),  _M_variant()
 210         {
 211           _M_variant._M_iterator._M_name = __name;
 212           _M_variant._M_iterator._M_address = &__it;
 213           _M_variant._M_iterator._M_type = &typeid(__it);
 214           _M_variant._M_iterator._M_constness =
 215             __is_same<_Safe_iterator<_Iterator, _Sequence>,
 216                                  typename _Sequence::iterator>::
 217               value? __mutable_iterator : __const_iterator;
 218           _M_variant._M_iterator._M_sequence = __it._M_get_sequence();
 219           _M_variant._M_iterator._M_seq_type = &typeid(_Sequence);
 220
 221           if (__it._M_singular())
 222             _M_variant._M_iterator._M_state = __singular;
 223           else
 224             {
 225               bool __is_begin = __it._M_is_begin();
 226               bool __is_end = __it._M_is_end();
 227               if (__is_end)
 228                 _M_variant._M_iterator._M_state = __end;
 229               else if (__is_begin)
 230                 _M_variant._M_iterator._M_state = __begin;
 231               else
 232                 _M_variant._M_iterator._M_state = __middle;
 233             }
 234         }
 235
 236       template<typename _Type>
 237         _Parameter(const _Type*& __it, const char* __name, _Is_iterator)
 238         : _M_kind(__iterator), _M_variant()
 239         {
 240           _M_variant._M_iterator._M_name = __name;
 241           _M_variant._M_iterator._M_address = &__it;
 242           _M_variant._M_iterator._M_type = &typeid(__it);
 243           _M_variant._M_iterator._M_constness = __mutable_iterator;
 244           _M_variant._M_iterator._M_state = __it? __unknown_state : __singular;
 245           _M_variant._M_iterator._M_sequence = 0;
 246           _M_variant._M_iterator._M_seq_type = 0;
 247         }
 248
 249       template<typename _Type>
 250         _Parameter(_Type*& __it, const char* __name, _Is_iterator)
 251         : _M_kind(__iterator), _M_variant()
 252         {
 253           _M_variant._M_iterator._M_name = __name;
 254           _M_variant._M_iterator._M_address = &__it;
 255           _M_variant._M_iterator._M_type = &typeid(__it);
 256           _M_variant._M_iterator._M_constness = __const_iterator;
 257           _M_variant._M_iterator._M_state = __it? __unknown_state : __singular;
 258           _M_variant._M_iterator._M_sequence = 0;
 259           _M_variant._M_iterator._M_seq_type = 0;
 260         }
 261
 262       template<typename _Iterator>
 263         _Parameter(const _Iterator& __it, const char* __name, _Is_iterator)
 264         : _M_kind(__iterator), _M_variant()
 265         {
 266           _M_variant._M_iterator._M_name = __name;
 267           _M_variant._M_iterator._M_address = &__it;
 268           _M_variant._M_iterator._M_type = &typeid(__it);
 269           _M_variant._M_iterator._M_constness = __unknown_constness;
 270           _M_variant._M_iterator._M_state =
 271             __gnu_debug::__check_singular(__it)? __singular : __unknown_state;
 272           _M_variant._M_iterator._M_sequence = 0;
 273           _M_variant._M_iterator._M_seq_type = 0;
 274         }
 275
 276       template<typename _Sequence>
 277         _Parameter(const _Safe_sequence<_Sequence>& __seq,
 278                    const char* __name, _Is_sequence)
 279         : _M_kind(__sequence), _M_variant()
 280         {
 281           _M_variant._M_sequence._M_name = __name;
 282           _M_variant._M_sequence._M_address =
 283             static_cast<const _Sequence*>(&__seq);
 284           _M_variant._M_sequence._M_type = &typeid(_Sequence);
 285         }
 286
 287       template<typename _Sequence>
 288         _Parameter(const _Sequence& __seq, const char* __name, _Is_sequence)
 289         : _M_kind(__sequence), _M_variant()
 290         {
 291           _M_variant._M_sequence._M_name = __name;
 292           _M_variant._M_sequence._M_address = &__seq;
 293           _M_variant._M_sequence._M_type = &typeid(_Sequence);
 294         }
 295
 296       void
 297       _M_print_field(const _Error_formatter* __formatter,
 298                      const char* __name) const;
 299
 300       void
 301       _M_print_description(const _Error_formatter* __formatter) const;
 302     };
 303
 304     friend struct _Parameter;
 305
 306   public:
 307     template<typename _Iterator>
 308       const _Error_formatter&
 309       _M_iterator(const _Iterator& __it, const char* __name = 0)  const
 310       {
 311         if (_M_num_parameters < size_t(__max_parameters))
 312           _M_parameters[_M_num_parameters++] = _Parameter(__it, __name,
 313                                                           _Is_iterator());
 314         return *this;
 315       }
 316
 317     const _Error_formatter&
 318     _M_integer(long __value, const char* __name = 0) const
 319     {
 320       if (_M_num_parameters < size_t(__max_parameters))
 321         _M_parameters[_M_num_parameters++] = _Parameter(__value, __name);
 322       return *this;
 323     }
 324
 325     const _Error_formatter&
 326     _M_string(const char* __value, const char* __name = 0) const
 327     {
 328       if (_M_num_parameters < size_t(__max_parameters))
 329         _M_parameters[_M_num_parameters++] = _Parameter(__value, __name);
 330       return *this;
 331     }
 332
 333     template<typename _Sequence>
 334       const _Error_formatter&
 335       _M_sequence(const _Sequence& __seq, const char* __name = 0) const
 336       {
 337         if (_M_num_parameters < size_t(__max_parameters))
 338           _M_parameters[_M_num_parameters++] = _Parameter(__seq, __name,
 339                                                           _Is_sequence());
 340         return *this;
 341       }
 342
 343     const _Error_formatter&
 344     _M_message(const char* __text) const
 345     { _M_text = __text; return *this; }
 346
 347     const _Error_formatter&
 348     _M_message(_Debug_msg_id __id) const;
 349
 350     void
 351     _M_error() const;
 352
 353   private:
 354     _Error_formatter(const char* __file, size_t __line)
 355     : _M_file(__file), _M_line(__line), _M_num_parameters(0), _M_text(0),
 356       _M_max_length(78), _M_column(1), _M_first_line(true), _M_wordwrap(false)
 357     { _M_get_max_length(); }
 358
 359     template<typename _Tp>
 360       void
 361       _M_format_word(char*, int, const char*, _Tp) const;
 362
 363     void
 364     _M_print_word(const char* __word) const;
 365
 366     void
 367     _M_print_string(const char* __string) const;
 368
 369     void
 370     _M_get_max_length() const;
 371
 372     enum { __max_parameters = 9 };
 373
 374     const char*         _M_file;
 375     size_t              _M_line;
 376     mutable _Parameter  _M_parameters[__max_parameters];
 377     mutable size_t      _M_num_parameters;
 378     mutable const char* _M_text;
 379     mutable size_t      _M_max_length;
 380     enum { _M_indent = 4 } ;
 381     mutable size_t      _M_column;
 382     mutable bool        _M_first_line;
 383     mutable bool        _M_wordwrap;
 384
 385   public:
 386     static _Error_formatter
 387     _M_at(const char* __file, size_t __line)
 388     { return _Error_formatter(__file, __line); }
 389   };
 390 } // namespace __gnu_debug
 391
 392 #endif