external_libraries/boost/libs/system/src/error_code.cpp

   1 //  error_code support implementation file  ----------------------------------//
   2
   3 //  Copyright Beman Dawes 2002, 2006
   4
   5 //  Distributed under the Boost Software License, Version 1.0. (See accompanying
   6 //  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   7
   8 //  See library home page at http://www.boost.org/libs/system
   9
  10 //----------------------------------------------------------------------------//
  11
  12 #include <boost/config/warning_disable.hpp>
  13
  14 // define BOOST_SYSTEM_SOURCE so that <boost/system/config.hpp> knows
  15 // the library is being built (possibly exporting rather than importing code)
  16 #define BOOST_SYSTEM_SOURCE
  17
  18 #include <boost/system/config.hpp>
  19 #include <boost/system/error_code.hpp>
  20 #include <boost/cerrno.hpp>
  21 #include <vector>
  22 #include <cstdlib>
  23 #include <cassert>
  24
  25 using namespace boost::system;
  26 using namespace boost::system::errc;
  27
  28 #include <cstring> // for strerror/strerror_r
  29
  30 # if defined( BOOST_WINDOWS_API )
  31 #   include <windows.h>
  32 #   include "local_free_on_destruction.hpp"
  33 #   ifndef ERROR_INCORRECT_SIZE
  34 #     define ERROR_INCORRECT_SIZE ERROR_BAD_ARGUMENTS
  35 #   endif
  36 # endif
  37
  38 //----------------------------------------------------------------------------//
  39
  40 namespace
  41 {
  42 #if defined(__PGI)
  43   using boost::system::errc::invalid_argument;
  44 #endif
  45   //  standard error categories  ---------------------------------------------//
  46
  47   class generic_error_category : public error_category
  48   {
  49   public:
  50     generic_error_category(){}
  51     const char *   name() const;
  52     std::string    message( int ev ) const;
  53   };
  54
  55   class system_error_category : public error_category
  56   {
  57   public:
  58     system_error_category(){}
  59     const char *        name() const;
  60     std::string         message( int ev ) const;
  61     error_condition     default_error_condition( int ev ) const;
  62   };
  63
  64   //  generic_error_category implementation  ---------------------------------//
  65
  66   const char * generic_error_category::name() const
  67   {
  68     return "generic";
  69   }
  70
  71   std::string generic_error_category::message( int ev ) const
  72   {
  73     static std::string unknown_err( "Unknown error" );
  74   // strerror_r is preferred because it is always thread safe,
  75   // however, we fallback to strerror in certain cases because:
  76   //   -- Windows doesn't provide strerror_r.
  77   //   -- HP and Sundo provide strerror_r on newer systems, but there is
  78   //      no way to tell if is available at runtime and in any case their
  79   //      versions of strerror are thread safe anyhow.
  80   //   -- Linux only sometimes provides strerror_r.
  81   //   -- Tru64 provides strerror_r only when compiled -pthread.
  82   //   -- VMS doesn't provide strerror_r, but on this platform, strerror is
  83   //      thread safe.
  84   # if defined(BOOST_WINDOWS_API) || defined(__hpux) || defined(__sun)\
  85      || (defined(__linux) && (!defined(__USE_XOPEN2K) || defined(BOOST_SYSTEM_USE_STRERROR)))\
  86      || (defined(__osf__) && !defined(_REENTRANT))\
  87      || (defined(__vms))\
  88      || (defined(__QNXNTO__))
  89       const char * c_str = std::strerror( ev );
  90       return  c_str
  91         ? std::string( c_str )
  92         : unknown_err;
  93   # else  // use strerror_r
  94       char buf[64];
  95       char * bp = buf;
  96       std::size_t sz = sizeof(buf);
  97   #  if defined(__CYGWIN__) || defined(__USE_GNU)
  98       // Oddball version of strerror_r
  99       const char * c_str = strerror_r( ev, bp, sz );
 100       return  c_str
 101         ? std::string( c_str )
 102         : unknown_err;
 103   #  else
 104       // POSIX version of strerror_r
 105       int result;
 106       for (;;)
 107       {
 108         // strerror_r returns 0 on success, otherwise ERANGE if buffer too small,
 109         // invalid_argument if ev not a valid error number
 110   #  if defined (__sgi)
 111         const char * c_str = strerror( ev );
 112         result = 0;
 113       return  c_str
 114         ? std::string( c_str )
 115         : unknown_err;
 116   #  else
 117         result = strerror_r( ev, bp, sz );
 118   #  endif
 119         if (result == 0 )
 120           break;
 121         else
 122         {
 123   #  if defined(__linux)
 124           // Linux strerror_r returns -1 on error, with error number in errno
 125           result = errno;
 126   #  endif
 127           if ( result !=  ERANGE ) break;
 128           if ( sz > sizeof(buf) ) std::free( bp );
 129           sz *= 2;
 130           if ( (bp = static_cast<char*>(std::malloc( sz ))) == 0 )
 131             return std::string( "ENOMEM" );
 132         }
 133       }
 134       std::string msg;
 135       try
 136       {
 137         msg = ( ( result == invalid_argument ) ? "Unknown error" : bp );
 138       }
 139
 140 #   ifndef BOOST_NO_EXCEPTIONS
 141       // See ticket #2098
 142       catch(...)
 143       {
 144         // just eat the exception
 145       }
 146 #   endif
 147
 148       if ( sz > sizeof(buf) ) std::free( bp );
 149       sz = 0;
 150       return msg;
 151   #  endif   // else POSIX version of strerror_r
 152   # endif  // else use strerror_r
 153   }
 154   //  system_error_category implementation  --------------------------------//
 155
 156   const char * system_error_category::name() const
 157   {
 158     return "system";
 159   }
 160
 161   error_condition system_error_category::default_error_condition( int ev ) const
 162   {
 163     switch ( ev )
 164     {
 165     case 0: return make_error_condition( success );
 166 # if defined(BOOST_POSIX_API)
 167     // POSIX-like O/S -> posix_errno decode table  ---------------------------//
 168     case E2BIG: return make_error_condition( argument_list_too_long );
 169     case EACCES: return make_error_condition( permission_denied );
 170     case EADDRINUSE: return make_error_condition( address_in_use );
 171     case EADDRNOTAVAIL: return make_error_condition( address_not_available );
 172     case EAFNOSUPPORT: return make_error_condition( address_family_not_supported );
 173     case EAGAIN: return make_error_condition( resource_unavailable_try_again );
 174 #   if EALREADY != EBUSY  //  EALREADY and EBUSY are the same on QNX Neutrino
 175     case EALREADY: return make_error_condition( connection_already_in_progress );
 176 #   endif
 177     case EBADF: return make_error_condition( bad_file_descriptor );
 178     case EBADMSG: return make_error_condition( bad_message );
 179     case EBUSY: return make_error_condition( device_or_resource_busy );
 180     case ECANCELED: return make_error_condition( operation_canceled );
 181     case ECHILD: return make_error_condition( no_child_process );
 182     case ECONNABORTED: return make_error_condition( connection_aborted );
 183     case ECONNREFUSED: return make_error_condition( connection_refused );
 184     case ECONNRESET: return make_error_condition( connection_reset );
 185     case EDEADLK: return make_error_condition( resource_deadlock_would_occur );
 186     case EDESTADDRREQ: return make_error_condition( destination_address_required );
 187     case EDOM: return make_error_condition( argument_out_of_domain );
 188     case EEXIST: return make_error_condition( file_exists );
 189     case EFAULT: return make_error_condition( bad_address );
 190     case EFBIG: return make_error_condition( file_too_large );
 191     case EHOSTUNREACH: return make_error_condition( host_unreachable );
 192     case EIDRM: return make_error_condition( identifier_removed );
 193     case EILSEQ: return make_error_condition( illegal_byte_sequence );
 194     case EINPROGRESS: return make_error_condition( operation_in_progress );
 195     case EINTR: return make_error_condition( interrupted );
 196     case EINVAL: return make_error_condition( invalid_argument );
 197     case EIO: return make_error_condition( io_error );
 198     case EISCONN: return make_error_condition( already_connected );
 199     case EISDIR: return make_error_condition( is_a_directory );
 200     case ELOOP: return make_error_condition( too_many_symbolic_link_levels );
 201     case EMFILE: return make_error_condition( too_many_files_open );
 202     case EMLINK: return make_error_condition( too_many_links );
 203     case EMSGSIZE: return make_error_condition( message_size );
 204     case ENAMETOOLONG: return make_error_condition( filename_too_long );
 205     case ENETDOWN: return make_error_condition( network_down );
 206     case ENETRESET: return make_error_condition( network_reset );
 207     case ENETUNREACH: return make_error_condition( network_unreachable );
 208     case ENFILE: return make_error_condition( too_many_files_open_in_system );
 209     case ENOBUFS: return make_error_condition( no_buffer_space );
 210     case ENODATA: return make_error_condition( no_message_available );
 211     case ENODEV: return make_error_condition( no_such_device );
 212     case ENOENT: return make_error_condition( no_such_file_or_directory );
 213     case ENOEXEC: return make_error_condition( executable_format_error );
 214     case ENOLCK: return make_error_condition( no_lock_available );
 215     case ENOLINK: return make_error_condition( no_link );
 216     case ENOMEM: return make_error_condition( not_enough_memory );
 217     case ENOMSG: return make_error_condition( no_message );
 218     case ENOPROTOOPT: return make_error_condition( no_protocol_option );
 219     case ENOSPC: return make_error_condition( no_space_on_device );
 220     case ENOSR: return make_error_condition( no_stream_resources );
 221     case ENOSTR: return make_error_condition( not_a_stream );
 222     case ENOSYS: return make_error_condition( function_not_supported );
 223     case ENOTCONN: return make_error_condition( not_connected );
 224     case ENOTDIR: return make_error_condition( not_a_directory );
 225   # if ENOTEMPTY != EEXIST // AIX treats ENOTEMPTY and EEXIST as the same value
 226     case ENOTEMPTY: return make_error_condition( directory_not_empty );
 227   # endif // ENOTEMPTY != EEXIST
 228   # if ENOTRECOVERABLE != ECONNRESET // the same on some Broadcom chips
 229     case ENOTRECOVERABLE: return make_error_condition( state_not_recoverable );
 230   # endif // ENOTRECOVERABLE != ECONNRESET
 231     case ENOTSOCK: return make_error_condition( not_a_socket );
 232     case ENOTSUP: return make_error_condition( not_supported );
 233     case ENOTTY: return make_error_condition( inappropriate_io_control_operation );
 234     case ENXIO: return make_error_condition( no_such_device_or_address );
 235   # if EOPNOTSUPP != ENOTSUP
 236     case EOPNOTSUPP: return make_error_condition( operation_not_supported );
 237   # endif // EOPNOTSUPP != ENOTSUP
 238     case EOVERFLOW: return make_error_condition( value_too_large );
 239   # if EOWNERDEAD != ECONNABORTED // the same on some Broadcom chips
 240     case EOWNERDEAD: return make_error_condition( owner_dead );
 241   # endif // EOWNERDEAD != ECONNABORTED
 242     case EPERM: return make_error_condition( operation_not_permitted );
 243     case EPIPE: return make_error_condition( broken_pipe );
 244     case EPROTO: return make_error_condition( protocol_error );
 245     case EPROTONOSUPPORT: return make_error_condition( protocol_not_supported );
 246     case EPROTOTYPE: return make_error_condition( wrong_protocol_type );
 247     case ERANGE: return make_error_condition( result_out_of_range );
 248     case EROFS: return make_error_condition( read_only_file_system );
 249     case ESPIPE: return make_error_condition( invalid_seek );
 250     case ESRCH: return make_error_condition( no_such_process );
 251     case ETIME: return make_error_condition( stream_timeout );
 252     case ETIMEDOUT: return make_error_condition( timed_out );
 253     case ETXTBSY: return make_error_condition( text_file_busy );
 254   # if EAGAIN != EWOULDBLOCK
 255     case EWOULDBLOCK: return make_error_condition( operation_would_block );
 256   # endif // EAGAIN != EWOULDBLOCK
 257     case EXDEV: return make_error_condition( cross_device_link );
 258   #else
 259     // Windows system -> posix_errno decode table  ---------------------------//
 260     // see WinError.h comments for descriptions of errors
 261     case ERROR_ACCESS_DENIED: return make_error_condition( permission_denied );
 262     case ERROR_ALREADY_EXISTS: return make_error_condition( file_exists );
 263     case ERROR_BAD_UNIT: return make_error_condition( no_such_device );
 264     case ERROR_BUFFER_OVERFLOW: return make_error_condition( filename_too_long );
 265     case ERROR_BUSY: return make_error_condition( device_or_resource_busy );
 266     case ERROR_BUSY_DRIVE: return make_error_condition( device_or_resource_busy );
 267     case ERROR_CANNOT_MAKE: return make_error_condition( permission_denied );
 268     case ERROR_CANTOPEN: return make_error_condition( io_error );
 269     case ERROR_CANTREAD: return make_error_condition( io_error );
 270     case ERROR_CANTWRITE: return make_error_condition( io_error );
 271     case ERROR_CURRENT_DIRECTORY: return make_error_condition( permission_denied );
 272     case ERROR_DEV_NOT_EXIST: return make_error_condition( no_such_device );
 273     case ERROR_DEVICE_IN_USE: return make_error_condition( device_or_resource_busy );
 274     case ERROR_DIR_NOT_EMPTY: return make_error_condition( directory_not_empty );
 275     case ERROR_DIRECTORY: return make_error_condition( invalid_argument ); // WinError.h: "The directory name is invalid"
 276     case ERROR_DISK_FULL: return make_error_condition( no_space_on_device );
 277     case ERROR_FILE_EXISTS: return make_error_condition( file_exists );
 278     case ERROR_FILE_NOT_FOUND: return make_error_condition( no_such_file_or_directory );
 279     case ERROR_HANDLE_DISK_FULL: return make_error_condition( no_space_on_device );
 280     case ERROR_INVALID_ACCESS: return make_error_condition( permission_denied );
 281     case ERROR_INVALID_DRIVE: return make_error_condition( no_such_device );
 282     case ERROR_INVALID_FUNCTION: return make_error_condition( function_not_supported );
 283     case ERROR_INVALID_HANDLE: return make_error_condition( invalid_argument );
 284     case ERROR_INVALID_NAME: return make_error_condition( invalid_argument );
 285     case ERROR_LOCK_VIOLATION: return make_error_condition( no_lock_available );
 286     case ERROR_LOCKED: return make_error_condition( no_lock_available );
 287     case ERROR_NEGATIVE_SEEK: return make_error_condition( invalid_argument );
 288     case ERROR_NOACCESS: return make_error_condition( permission_denied );
 289     case ERROR_NOT_ENOUGH_MEMORY: return make_error_condition( not_enough_memory );
 290     case ERROR_NOT_READY: return make_error_condition( resource_unavailable_try_again );
 291     case ERROR_NOT_SAME_DEVICE: return make_error_condition( cross_device_link );
 292     case ERROR_OPEN_FAILED: return make_error_condition( io_error );
 293     case ERROR_OPEN_FILES: return make_error_condition( device_or_resource_busy );
 294     case ERROR_OPERATION_ABORTED: return make_error_condition( operation_canceled );
 295     case ERROR_OUTOFMEMORY: return make_error_condition( not_enough_memory );
 296     case ERROR_PATH_NOT_FOUND: return make_error_condition( no_such_file_or_directory );
 297     case ERROR_READ_FAULT: return make_error_condition( io_error );
 298     case ERROR_RETRY: return make_error_condition( resource_unavailable_try_again );
 299     case ERROR_SEEK: return make_error_condition( io_error );
 300     case ERROR_SHARING_VIOLATION: return make_error_condition( permission_denied );
 301     case ERROR_TOO_MANY_OPEN_FILES: return make_error_condition( too_many_files_open );
 302     case ERROR_WRITE_FAULT: return make_error_condition( io_error );
 303     case ERROR_WRITE_PROTECT: return make_error_condition( permission_denied );
 304     case WSAEACCES: return make_error_condition( permission_denied );
 305     case WSAEADDRINUSE: return make_error_condition( address_in_use );
 306     case WSAEADDRNOTAVAIL: return make_error_condition( address_not_available );
 307     case WSAEAFNOSUPPORT: return make_error_condition( address_family_not_supported );
 308     case WSAEALREADY: return make_error_condition( connection_already_in_progress );
 309     case WSAEBADF: return make_error_condition( bad_file_descriptor );
 310     case WSAECONNABORTED: return make_error_condition( connection_aborted );
 311     case WSAECONNREFUSED: return make_error_condition( connection_refused );
 312     case WSAECONNRESET: return make_error_condition( connection_reset );
 313     case WSAEDESTADDRREQ: return make_error_condition( destination_address_required );
 314     case WSAEFAULT: return make_error_condition( bad_address );
 315     case WSAEHOSTUNREACH: return make_error_condition( host_unreachable );
 316     case WSAEINPROGRESS: return make_error_condition( operation_in_progress );
 317     case WSAEINTR: return make_error_condition( interrupted );
 318     case WSAEINVAL: return make_error_condition( invalid_argument );
 319     case WSAEISCONN: return make_error_condition( already_connected );
 320     case WSAEMFILE: return make_error_condition( too_many_files_open );
 321     case WSAEMSGSIZE: return make_error_condition( message_size );
 322     case WSAENAMETOOLONG: return make_error_condition( filename_too_long );
 323     case WSAENETDOWN: return make_error_condition( network_down );
 324     case WSAENETRESET: return make_error_condition( network_reset );
 325     case WSAENETUNREACH: return make_error_condition( network_unreachable );
 326     case WSAENOBUFS: return make_error_condition( no_buffer_space );
 327     case WSAENOPROTOOPT: return make_error_condition( no_protocol_option );
 328     case WSAENOTCONN: return make_error_condition( not_connected );
 329     case WSAENOTSOCK: return make_error_condition( not_a_socket );
 330     case WSAEOPNOTSUPP: return make_error_condition( operation_not_supported );
 331     case WSAEPROTONOSUPPORT: return make_error_condition( protocol_not_supported );
 332     case WSAEPROTOTYPE: return make_error_condition( wrong_protocol_type );
 333     case WSAETIMEDOUT: return make_error_condition( timed_out );
 334     case WSAEWOULDBLOCK: return make_error_condition( operation_would_block );
 335   #endif
 336     default: return error_condition( ev, system_category() );
 337     }
 338   }
 339
 340 # if !defined( BOOST_WINDOWS_API )
 341
 342   std::string system_error_category::message( int ev ) const
 343   {
 344     return generic_category().message( ev );
 345   }
 346 # else
 347
 348   std::string system_error_category::message( int ev ) const
 349   {
 350 # ifndef BOOST_NO_ANSI_APIS
 351     LPVOID lpMsgBuf = 0;
 352     DWORD retval = ::FormatMessageA(
 353         FORMAT_MESSAGE_ALLOCATE_BUFFER |
 354         FORMAT_MESSAGE_FROM_SYSTEM |
 355         FORMAT_MESSAGE_IGNORE_INSERTS,
 356         NULL,
 357         ev,
 358         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
 359         (LPSTR) &lpMsgBuf,
 360         0,
 361         NULL
 362     );
 363     detail::local_free_on_destruction lfod(lpMsgBuf);
 364     if (retval == 0)
 365         return std::string("Unknown error");
 366
 367     std::string str( static_cast<LPCSTR>(lpMsgBuf) );
 368 # else  // WinCE workaround
 369     LPVOID lpMsgBuf = 0;
 370     DWORD retval = ::FormatMessageW(
 371         FORMAT_MESSAGE_ALLOCATE_BUFFER |
 372         FORMAT_MESSAGE_FROM_SYSTEM |
 373         FORMAT_MESSAGE_IGNORE_INSERTS,
 374         NULL,
 375         ev,
 376         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
 377         (LPWSTR) &lpMsgBuf,
 378         0,
 379         NULL
 380     );
 381     detail::local_free_on_destruction lfod(lpMsgBuf);
 382     if (retval == 0)
 383         return std::string("Unknown error");
 384
 385     int num_chars = (wcslen( static_cast<LPCWSTR>(lpMsgBuf) ) + 1) * 2;
 386     LPSTR narrow_buffer = (LPSTR)_alloca( num_chars );
 387     if (::WideCharToMultiByte(CP_ACP, 0, static_cast<LPCWSTR>(lpMsgBuf), -1, narrow_buffer, num_chars, NULL, NULL) == 0)
 388         return std::string("Unknown error");
 389
 390     std::string str( narrow_buffer );
 391 # endif
 392     while ( str.size()
 393       && (str[str.size()-1] == '\n' || str[str.size()-1] == '\r') )
 394         str.erase( str.size()-1 );
 395     if ( str.size() && str[str.size()-1] == '.' )
 396       { str.erase( str.size()-1 ); }
 397     return str;
 398   }
 399 # endif
 400
 401 } // unnamed namespace
 402
 403 namespace boost
 404 {
 405   namespace system
 406   {
 407
 408 # ifndef BOOST_SYSTEM_NO_DEPRECATED
 409     BOOST_SYSTEM_DECL error_code throws; // "throw on error" special error_code;
 410                                          //  note that it doesn't matter if this
 411                                          //  isn't initialized before use since
 412                                          //  the only use is to take its
 413                                          //  address for comparison purposes
 414 # endif
 415
 416     BOOST_SYSTEM_DECL const error_category & system_category()
 417     {
 418       static const system_error_category  system_category_const;
 419       return system_category_const;
 420     }
 421
 422     BOOST_SYSTEM_DECL const error_category & generic_category()
 423     {
 424       static const generic_error_category generic_category_const;
 425       return generic_category_const;
 426     }
 427
 428   } // namespace system
 429 } // namespace boost