reactos/lib/sdk/crt/stdlib/errno.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crt/errno.c
   5  * PURPOSE:     Unknown
   6  * PROGRAMER:   Unknown
   7  *
   8  */
   9 #include <precomp.h>
  10 #include "doserrmap.h"
  11 #include <errno.h>
  12 #include <internal/wine/msvcrt.h>
  13
  14 static _invalid_parameter_handler invalid_parameter_handler = NULL;
  15
  16 /*
  17  * @implemented
  18  */
  19 unsigned long* __doserrno(void)
  20 {
  21   return (unsigned long*)(&GetThreadData()->tdoserrno);
  22 }
  23
  24 /*
  25  * @implemented
  26  */
  27 int *_errno(void)
  28 {
  29   return(&GetThreadData()->terrno);
  30 }
  31
  32
  33 int __set_doserrno(int error)
  34 {
  35   PTHREADDATA ThreadData;
  36
  37   ThreadData = GetThreadData();
  38   if (ThreadData)
  39     ThreadData->tdoserrno = error;
  40
  41   return(error);
  42 }
  43
  44 int __set_errno(int error)
  45 {
  46   PTHREADDATA ThreadData;
  47
  48   ThreadData = GetThreadData();
  49   if (ThreadData)
  50     ThreadData->terrno = error;
  51
  52   return(error);
  53 }
  54
  55 /*
  56  * This function sets both doserrno to the passed in OS error code
  57  * and also maps this to an appropriate errno code.  The mapping
  58  * has been deduced automagically by running this functions, which
  59  * exists in MSVCRT but is undocumented, on all the error codes in
  60  * winerror.h.
  61  */
  62 void _dosmaperr(unsigned long oserror)
  63 {
  64         int pos, base, lim;
  65
  66         __set_doserrno(oserror);
  67
  68         /* Use binary chop to find the corresponding errno code */
  69         for (base=0, lim=sizeof(doserrmap)/sizeof(doserrmap[0]); lim; lim >>= 1) {
  70                 pos = base+(lim >> 1);
  71                 if (doserrmap[pos].winerr == oserror) {
  72                         __set_errno(doserrmap[pos].en);
  73                         return;
  74                 } else if (doserrmap[pos].winerr < oserror) {
  75                         base = pos + 1;
  76                         --lim;
  77                 }
  78         }
  79         /* EINVAL appears to be the default */
  80         __set_errno(EINVAL);
  81 }
  82
  83 /******************************************************************************
  84 *              _set_error_mode (MSVCRT.@)
  85 *
  86 * Set the error mode, which describes where the C run-time writes error
  87 * messages.
  88 *
  89 * PARAMS
  90 *   mode - the new error mode
  91 *
  92 * RETURNS
  93 *   The old error mode.
  94 *
  95 * TODO
  96 *  This function does not have a proper implementation; the error mode is
  97 *  never used.
  98 */
  99 int CDECL _set_error_mode(int mode)
 100 {
 101     static int current_mode = MSVCRT__OUT_TO_DEFAULT;
 102
 103     const int old = current_mode;
 104     if ( MSVCRT__REPORT_ERRMODE != mode ) {
 105         current_mode = mode;
 106
 107     }
 108     return old;
 109 }
 110
 111 /******************************************************************************
 112 *              _seterrormode (MSVCRT.@)
 113 */
 114 void CDECL _seterrormode(int mode)
 115 {
 116     SetErrorMode( mode );
 117 }
 118
 119 /******************************************************************************
 120  *              _invalid_parameter (MSVCRT.@)
 121  */
 122 void __cdecl _invalid_parameter(const wchar_t *expr, const wchar_t *func,
 123                                        const wchar_t *file, unsigned int line, uintptr_t arg)
 124 {
 125     if (invalid_parameter_handler) invalid_parameter_handler( expr, func, file, line, arg );
 126     else
 127     {
 128         ERR( "%s:%u %s: %s %lx\n", debugstr_w(file), line, debugstr_w(func), debugstr_w(expr), arg );
 129         RaiseException( STATUS_INVALID_CRUNTIME_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, NULL );
 130     }
 131 }
 132
 133 /* _get_invalid_parameter_handler - not exported in native msvcrt, added in msvcr80 */
 134 _invalid_parameter_handler CDECL _get_invalid_parameter_handler(void)
 135 {
 136     TRACE("\n");
 137     return invalid_parameter_handler;
 138 }
 139
 140 /* _set_invalid_parameter_handler - not exproted in native msvcrt, added in msvcr80 */
 141 _invalid_parameter_handler CDECL _set_invalid_parameter_handler(
 142         _invalid_parameter_handler handler)
 143 {
 144     _invalid_parameter_handler old = invalid_parameter_handler;
 145
 146     TRACE("(%p)\n", handler);
 147
 148     invalid_parameter_handler = handler;
 149     return old;
 150 }
 151 /* EOF */