reactos/lib/crtdll/old cruft/stdlib/errno.c

   1 #include <precomp.h>
   2 #include <msvcrt/errno.h>
   3 #include "../../msvcrt/stdlib/doserrmap.h"
   4
   5 #undef errno
   6 int errno;
   7
   8 #undef _doserrno
   9 int _doserrno;
  10
  11 #undef _fpecode
  12 int fpecode;
  13
  14 /*
  15  * @implemented
  16  */
  17 int *_errno(void)
  18 {
  19         return &errno;
  20 }
  21
  22 int __set_errno (int error)
  23 {
  24         errno = error;
  25         return error;
  26 }
  27
  28 /*
  29  * @implemented
  30  */
  31 int * __fpecode ( void )
  32 {
  33         return &fpecode;
  34 }
  35
  36 /*
  37  * @implemented
  38  */
  39 int*    __doserrno(void)
  40 {
  41         _doserrno = GetLastError();
  42         return &_doserrno;
  43 }
  44
  45 /*
  46  * This function sets both doserrno to the passed in OS error code
  47  * and also maps this to an appropriate errno code.  The mapping
  48  * has been deduced automagically by running this functions, which
  49  * exists in MSVCRT but is undocumented, on all the error codes in
  50  * winerror.h.
  51  */
  52 void _dosmaperr(unsigned long oserror)
  53 {
  54         int pos, base, lim;
  55
  56         SetLastError(oserror);
  57
  58         /* Use binary chop to find the corresponding errno code */
  59         for (base=0, lim=sizeof(doserrmap)/sizeof(doserrmap[0]); lim; lim >>= 1) {
  60                 pos = base+(lim >> 1);
  61                 if (doserrmap[pos].winerr == oserror) {
  62                         __set_errno(doserrmap[pos].en);
  63                         return;
  64                 } else if (doserrmap[pos].winerr > oserror) {
  65                         base = pos + 1;
  66                         --lim;
  67                 }
  68         }
  69         /* EINVAL appears to be the default */
  70         __set_errno(EINVAL);
  71 }