src/libs/posix_error_mapper/misc.cpp

   1 /*
   2  * Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include <stdio.h>
   7 #include <string.h>
   8
   9 #include "posix_error_mapper.h"
  10
  11
  12 static int*
  13 real_errnop()
  14 {
  15         GET_REAL_FUNCTION(int*, _errnop, (void));
  16         return sReal__errnop();
  17 }
  18
  19
  20 int*
  21 _errnop(void)
  22 {
  23         HIDDEN_FUNCTION(_errnop);
  24
  25         // convert errno to positive error code
  26         int* error = real_errnop();
  27         if (*error < 0)
  28                 *error = B_TO_POSITIVE_ERROR(*error);
  29         return error;
  30 }
  31
  32
  33
  34 WRAPPER_FUNCTION(char*, strerror, (int errorCode),
  35         return sReal_strerror(B_TO_NEGATIVE_ERROR(errorCode));
  36 )
  37
  38
  39 WRAPPER_FUNCTION(int, strerror_r,
  40                 (int errorCode, char* buffer, size_t bufferSize),
  41         return sReal_strerror_r(B_TO_NEGATIVE_ERROR(errorCode), buffer, bufferSize);
  42 )
  43
  44
  45 WRAPPER_FUNCTION(void, perror, (const char* errorPrefix),
  46         // convert errno to negative error code
  47         int* error = real_errnop();
  48         int oldError = *error;
  49         if (*error > 0)
  50                 *error = B_TO_NEGATIVE_ERROR(*error);
  51
  52         // call the real perror()
  53         sReal_perror(errorPrefix);
  54
  55         // reset errno
  56         *error = oldError;
  57 )