gnu/dist/gcc4/libstdc++-v3/include/debug/formatter.h

   1 // Debug-mode error formatting implementation -*- C++ -*-
   2
   3 // Copyright (C) 2003, 2004, 2005 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 2, 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 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 #ifndef _GLIBCXX_DEBUG_FORMATTER_H
  31 #define _GLIBCXX_DEBUG_FORMATTER_H 1
  32
  33 #include <typeinfo>
  34 #include <debug/debug.h>
  35
  36 namespace __gnu_debug
  37 {
  38   using std::type_info;
  39
  40   /** Determine if the two types are the same. */
  41   template<typename _Type1, typename _Type2>
  42     struct __is_same
  43     {
  44       static const bool value = false;
  45     };
  46
  47   template<typename _Type>
  48     struct __is_same<_Type, _Type>
  49     {
  50       static const bool value = true;
  51     };
  52
  53   template<bool> struct __truth { };
  54
  55   class _Safe_sequence_base;
  56
  57   template<typename _Iterator, typename _Sequence>
  58     class _Safe_iterator;
  59
  60   template<typename _Sequence>
  61     class _Safe_sequence;
  62
  63   enum _Debug_msg_id
  64   {
  65     // General checks
  66     __msg_valid_range,
  67     __msg_insert_singular,
  68     __msg_insert_different,
  69     __msg_erase_bad,
  70     __msg_erase_different,
  71     __msg_subscript_oob,
  72     __msg_empty,
  73     __msg_unpartitioned,
  74     __msg_unpartitioned_pred,
  75     __msg_unsorted,
  76     __msg_unsorted_pred,
  77     __msg_not_heap,
  78     __msg_not_heap_pred,
  79     // std::bitset checks
  80     __msg_bad_bitset_write,
  81     __msg_bad_bitset_read,
  82     __msg_bad_bitset_flip,
  83     // std::list checks
  84     __msg_self_splice,
  85     __msg_splice_alloc,
  86     __msg_splice_bad,
  87     __msg_splice_other,
  88     __msg_splice_overlap,
  89     // iterator checks
  90     __msg_init_singular,
  91     __msg_init_copy_singular,
  92     __msg_init_const_singular,
  93     __msg_copy_singular,
  94     __msg_bad_deref,
  95     __msg_bad_inc,
  96     __msg_bad_dec,
  97     __msg_iter_subscript_oob,
  98     __msg_advance_oob,
  99     __msg_retreat_oob,
 100     __msg_iter_compare_bad,
 101     __msg_compare_different,
 102     __msg_iter_order_bad,
 103     __msg_order_different,
 104     __msg_distance_bad,
 105     __msg_distance_different,
 106     // istream_iterator
 107     __msg_deref_istream,
 108     __msg_inc_istream,
 109     // ostream_iterator
 110     __msg_output_ostream,
 111     // istreambuf_iterator
 112     __msg_deref_istreambuf,
 113     __msg_inc_istreambuf
 114   };
 115
 116   class _Error_formatter
 117   {
 118     /// Whether an iterator is constant, mutable, or unknown
 119     enum _Constness
 120     {
 121       __unknown_constness,
 122       __const_iterator,
 123       __mutable_iterator,
 124       __last_constness
 125     };
 126
 127     // The state of the iterator (fine-grained), if we know it.
 128     enum _Iterator_state
 129     {
 130       __unknown_state,
 131       __singular,      // singular, may still be attached to a sequence
 132       __begin,         // dereferenceable, and at the beginning
 133       __middle,        // dereferenceable, not at the beginning
 134       __end,           // past-the-end, may be at beginning if sequence empty
 135       __last_state
 136     };
 137
 138     // Tags denoting the type of parameter for construction
 139     struct _Is_iterator { };
 140     struct _Is_sequence { };
 141
 142     // A parameter that may be referenced by an error message
 143     struct _Parameter
 144     {
 145       enum
 146       {
 147         __unused_param,
 148         __iterator,
 149         __sequence,
 150         __integer,
 151         __string
 152       } _M_kind;
 153
 154       union
 155       {
 156         // When _M_kind == __iterator
 157         struct
 158         {
 159           const char*      _M_name;
 160           const void*      _M_address;
 161           const type_info* _M_type;
 162           _Constness       _M_constness;
 163           _Iterator_state  _M_state;
 164           const void*      _M_sequence;
 165           const type_info* _M_seq_type;
 166         } _M_iterator;
 167
 168         // When _M_kind == __sequence
 169         struct
 170         {
 171           const char*      _M_name;
 172           const void*      _M_address;
 173           const type_info* _M_type;
 174         } _M_sequence;
 175
 176         // When _M_kind == __integer
 177         struct
 178         {
 179           const char* _M_name;
 180           long        _M_value;
 181         } _M_integer;
 182
 183         // When _M_kind == __string
 184         struct
 185         {
 186           const char* _M_name;
 187           const char* _M_value;
 188         } _M_string;
 189       } _M_variant;
 190
 191       _Parameter() : _M_kind(__unused_param), _M_variant() { }
 192
 193       _Parameter(long __value, const char* __name)
 194       : _M_kind(__integer), _M_variant()
 195       {
 196         _M_variant._M_integer._M_name = __name;
 197         _M_variant._M_integer._M_value = __value;
 198       }
 199
 200       _Parameter(const char* __value, const char* __name)
 201       : _M_kind(__string), _M_variant()
 202       {
 203         _M_variant._M_string._M_name = __name;
 204         _M_variant._M_string._M_value = __value;
 205       }
 206
 207       template<typename _Iterator, typename _Sequence>
 208         _Parameter(const _Safe_iterator<_Iterator, _Sequence>& __it,
 209                    const char* __name, _Is_iterator)
 210         : _M_kind(__iterator),  _M_variant()
 211         {
 212           _M_variant._M_iterator._M_name = __name;
 213           _M_variant._M_iterator._M_address = &__it;
 214           _M_variant._M_iterator._M_type = &typeid(__it);
 215           _M_variant._M_iterator._M_constness =
 216             __is_same<_Safe_iterator<_Iterator, _Sequence>,
 217                                  typename _Sequence::iterator>::
 218               value? __mutable_iterator : __const_iterator;
 219           _M_variant._M_iterator._M_sequence = __it._M_get_sequence();
 220           _M_variant._M_iterator._M_seq_type = &typeid(_Sequence);
 221
 222           if (__it._M_singular())
 223             _M_variant._M_iterator._M_state = __singular;
 224           else
 225             {
 226               bool __is_begin = __it._M_is_begin();
 227               bool __is_end = __it._M_is_end();
 228               if (__is_end)
 229                 _M_variant._M_iterator._M_state = __end;
 230               else if (__is_begin)
 231                 _M_variant._M_iterator._M_state = __begin;
 232               else
 233                 _M_variant._M_iterator._M_state = __middle;
 234             }
 235         }
 236
 237       template<typename _Type>
 238         _Parameter(const _Type*& __it, const char* __name, _Is_iterator)
 239         : _M_kind(__iterator), _M_variant()
 240         {
 241           _M_variant._M_iterator._M_name = __name;
 242           _M_variant._M_iterator._M_address = &__it;
 243           _M_variant._M_iterator._M_type = &typeid(__it);
 244           _M_variant._M_iterator._M_constness = __mutable_iterator;
 245           _M_variant._M_iterator._M_state = __it? __unknown_state : __singular;
 246           _M_variant._M_iterator._M_sequence = 0;
 247           _M_variant._M_iterator._M_seq_type = 0;
 248         }
 249
 250       template<typename _Type>
 251         _Parameter(_Type*& __it, const char* __name, _Is_iterator)
 252         : _M_kind(__iterator), _M_variant()
 253         {
 254           _M_variant._M_iterator._M_name = __name;
 255           _M_variant._M_iterator._M_address = &__it;
 256           _M_variant._M_iterator._M_type = &typeid(__it);
 257           _M_variant._M_iterator._M_constness = __const_iterator;
 258           _M_variant._M_iterator._M_state = __it? __unknown_state : __singular;
 259           _M_variant._M_iterator._M_sequence = 0;
 260           _M_variant._M_iterator._M_seq_type = 0;
 261         }
 262
 263       template<typename _Iterator>
 264         _Parameter(const _Iterator& __it, const char* __name, _Is_iterator)
 265         : _M_kind(__iterator), _M_variant()
 266         {
 267           _M_variant._M_iterator._M_name = __name;
 268           _M_variant._M_iterator._M_address = &__it;
 269           _M_variant._M_iterator._M_type = &typeid(__it);
 270           _M_variant._M_iterator._M_constness = __unknown_constness;
 271           _M_variant._M_iterator._M_state =
 272             __gnu_debug::__check_singular(__it)? __singular : __unknown_state;
 273           _M_variant._M_iterator._M_sequence = 0;
 274           _M_variant._M_iterator._M_seq_type = 0;
 275         }
 276
 277       template<typename _Sequence>
 278         _Parameter(const _Safe_sequence<_Sequence>& __seq,
 279                    const char* __name, _Is_sequence)
 280         : _M_kind(__sequence), _M_variant()
 281         {
 282           _M_variant._M_sequence._M_name = __name;
 283           _M_variant._M_sequence._M_address =
 284             static_cast<const _Sequence*>(&__seq);
 285           _M_variant._M_sequence._M_type = &typeid(_Sequence);
 286         }
 287
 288       template<typename _Sequence>
 289         _Parameter(const _Sequence& __seq, const char* __name, _Is_sequence)
 290         : _M_kind(__sequence), _M_variant()
 291         {
 292           _M_variant._M_sequence._M_name = __name;
 293           _M_variant._M_sequence._M_address = &__seq;
 294           _M_variant._M_sequence._M_type = &typeid(_Sequence);
 295         }
 296
 297       void
 298       _M_print_field(const _Error_formatter* __formatter,
 299                      const char* __name) const;
 300
 301       void
 302       _M_print_description(const _Error_formatter* __formatter) const;
 303     };
 304
 305     friend struct _Parameter;
 306
 307   public:
 308     template<typename _Iterator>
 309       const _Error_formatter&
 310       _M_iterator(const _Iterator& __it, const char* __name = 0)  const
 311       {
 312         if (_M_num_parameters < size_t(__max_parameters))
 313           _M_parameters[_M_num_parameters++] = _Parameter(__it, __name,
 314                                                           _Is_iterator());
 315         return *this;
 316       }
 317
 318     const _Error_formatter&
 319     _M_integer(long __value, const char* __name = 0) const
 320     {
 321       if (_M_num_parameters < size_t(__max_parameters))
 322         _M_parameters[_M_num_parameters++] = _Parameter(__value, __name);
 323       return *this;
 324     }
 325
 326     const _Error_formatter&
 327     _M_string(const char* __value, const char* __name = 0) const
 328     {
 329       if (_M_num_parameters < size_t(__max_parameters))
 330         _M_parameters[_M_num_parameters++] = _Parameter(__value, __name);
 331       return *this;
 332     }
 333
 334     template<typename _Sequence>
 335       const _Error_formatter&
 336       _M_sequence(const _Sequence& __seq, const char* __name = 0) const
 337       {
 338         if (_M_num_parameters < size_t(__max_parameters))
 339           _M_parameters[_M_num_parameters++] = _Parameter(__seq, __name,
 340                                                           _Is_sequence());
 341         return *this;
 342       }
 343
 344     const _Error_formatter&
 345     _M_message(const char* __text) const
 346     { _M_text = __text; return *this; }
 347
 348     const _Error_formatter&
 349     _M_message(_Debug_msg_id __id) const;
 350
 351     void
 352     _M_error() const;
 353
 354   private:
 355     _Error_formatter(const char* __file, size_t __line)
 356     : _M_file(__file), _M_line(__line), _M_num_parameters(0), _M_text(0),
 357       _M_max_length(78), _M_column(1), _M_first_line(true), _M_wordwrap(false)
 358     { }
 359
 360     template<typename _Tp>
 361       void
 362       _M_format_word(char*, int, const char*, _Tp) const;
 363
 364     void
 365     _M_print_word(const char* __word) const;
 366
 367     void
 368     _M_print_string(const char* __string) const;
 369
 370     enum { __max_parameters = 9 };
 371
 372     const char*         _M_file;
 373     size_t              _M_line;
 374     mutable _Parameter  _M_parameters[__max_parameters];
 375     mutable size_t      _M_num_parameters;
 376     mutable const char* _M_text;
 377     mutable size_t      _M_max_length;
 378     enum { _M_indent = 4 } ;
 379     mutable size_t      _M_column;
 380     mutable bool        _M_first_line;
 381     mutable bool        _M_wordwrap;
 382
 383   public:
 384     static _Error_formatter
 385     _M_at(const char* __file, size_t __line)
 386     { return _Error_formatter(__file, __line); }
 387   };
 388 } // namespace __gnu_debug
 389
 390 #endif