lib/Support/WindowsError.cpp

   1 //===-- WindowsError.cpp - Support for mapping windows errors to posix-----===//
   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 file implements a mapping from windows errors to posix ones.
  11 //  The standard doesn't define what the equivalence is from system
  12 //  errors to generic ones. The one implemented in msvc is too conservative
  13 //  for llvm, so we do an extra mapping when constructing an error_code
  14 //  from an windows error. This allows the rest of llvm to simple checks
  15 //  like "EC == std::errc::file_exists" and have it work on both posix and
  16 //  windows.
  17 //
  18 //===----------------------------------------------------------------------===//
  19
  20
  21 #include "llvm/Support/WindowsError.h"
  22
  23 #include "llvm/Config/llvm-config.h"
  24
  25 #ifdef LLVM_ON_WIN32
  26
  27 #include <winerror.h>
  28
  29
  30 // I'd rather not double the line count of the following.
  31 #define MAP_ERR_TO_COND(x, y)                                                  \
  32   case x:                                                                      \
  33     return std::make_error_code(std::errc::y)
  34
  35 std::error_code llvm::mapWindowsError(unsigned EV) {
  36   switch (EV) {
  37     MAP_ERR_TO_COND(ERROR_ACCESS_DENIED, permission_denied);
  38     MAP_ERR_TO_COND(ERROR_ALREADY_EXISTS, file_exists);
  39     MAP_ERR_TO_COND(ERROR_BAD_UNIT, no_such_device);
  40     MAP_ERR_TO_COND(ERROR_BUFFER_OVERFLOW, filename_too_long);
  41     MAP_ERR_TO_COND(ERROR_BUSY, device_or_resource_busy);
  42     MAP_ERR_TO_COND(ERROR_BUSY_DRIVE, device_or_resource_busy);
  43     MAP_ERR_TO_COND(ERROR_CANNOT_MAKE, permission_denied);
  44     MAP_ERR_TO_COND(ERROR_CANTOPEN, io_error);
  45     MAP_ERR_TO_COND(ERROR_CANTREAD, io_error);
  46     MAP_ERR_TO_COND(ERROR_CANTWRITE, io_error);
  47     MAP_ERR_TO_COND(ERROR_CURRENT_DIRECTORY, permission_denied);
  48     MAP_ERR_TO_COND(ERROR_DEV_NOT_EXIST, no_such_device);
  49     MAP_ERR_TO_COND(ERROR_DEVICE_IN_USE, device_or_resource_busy);
  50     MAP_ERR_TO_COND(ERROR_DIR_NOT_EMPTY, directory_not_empty);
  51     MAP_ERR_TO_COND(ERROR_DIRECTORY, invalid_argument);
  52     MAP_ERR_TO_COND(ERROR_DISK_FULL, no_space_on_device);
  53     MAP_ERR_TO_COND(ERROR_FILE_EXISTS, file_exists);
  54     MAP_ERR_TO_COND(ERROR_FILE_NOT_FOUND, no_such_file_or_directory);
  55     MAP_ERR_TO_COND(ERROR_HANDLE_DISK_FULL, no_space_on_device);
  56     MAP_ERR_TO_COND(ERROR_INVALID_ACCESS, permission_denied);
  57     MAP_ERR_TO_COND(ERROR_INVALID_DRIVE, no_such_device);
  58     MAP_ERR_TO_COND(ERROR_INVALID_FUNCTION, function_not_supported);
  59     MAP_ERR_TO_COND(ERROR_INVALID_HANDLE, invalid_argument);
  60     MAP_ERR_TO_COND(ERROR_INVALID_NAME, invalid_argument);
  61     MAP_ERR_TO_COND(ERROR_LOCK_VIOLATION, no_lock_available);
  62     MAP_ERR_TO_COND(ERROR_LOCKED, no_lock_available);
  63     MAP_ERR_TO_COND(ERROR_NEGATIVE_SEEK, invalid_argument);
  64     MAP_ERR_TO_COND(ERROR_NOACCESS, permission_denied);
  65     MAP_ERR_TO_COND(ERROR_NOT_ENOUGH_MEMORY, not_enough_memory);
  66     MAP_ERR_TO_COND(ERROR_NOT_READY, resource_unavailable_try_again);
  67     MAP_ERR_TO_COND(ERROR_OPEN_FAILED, io_error);
  68     MAP_ERR_TO_COND(ERROR_OPEN_FILES, device_or_resource_busy);
  69     MAP_ERR_TO_COND(ERROR_OUTOFMEMORY, not_enough_memory);
  70     MAP_ERR_TO_COND(ERROR_PATH_NOT_FOUND, no_such_file_or_directory);
  71     MAP_ERR_TO_COND(ERROR_BAD_NETPATH, no_such_file_or_directory);
  72     MAP_ERR_TO_COND(ERROR_READ_FAULT, io_error);
  73     MAP_ERR_TO_COND(ERROR_RETRY, resource_unavailable_try_again);
  74     MAP_ERR_TO_COND(ERROR_SEEK, io_error);
  75     MAP_ERR_TO_COND(ERROR_SHARING_VIOLATION, permission_denied);
  76     MAP_ERR_TO_COND(ERROR_TOO_MANY_OPEN_FILES, too_many_files_open);
  77     MAP_ERR_TO_COND(ERROR_WRITE_FAULT, io_error);
  78     MAP_ERR_TO_COND(ERROR_WRITE_PROTECT, permission_denied);
  79     MAP_ERR_TO_COND(WSAEACCES, permission_denied);
  80     MAP_ERR_TO_COND(WSAEBADF, bad_file_descriptor);
  81     MAP_ERR_TO_COND(WSAEFAULT, bad_address);
  82     MAP_ERR_TO_COND(WSAEINTR, interrupted);
  83     MAP_ERR_TO_COND(WSAEINVAL, invalid_argument);
  84     MAP_ERR_TO_COND(WSAEMFILE, too_many_files_open);
  85     MAP_ERR_TO_COND(WSAENAMETOOLONG, filename_too_long);
  86   default:
  87     return std::error_code(EV, std::system_category());
  88   }
  89 }
  90
  91 #endif