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  *              _errno (MSVCRT.@)
  18  */
  19 int CDECL *_errno(void)
  20 {
  21     return &(msvcrt_get_thread_data()->thread_errno);
  22 }
  23
  24 /*********************************************************************
  25  *              __doserrno (MSVCRT.@)
  26  */
  27 unsigned long* CDECL __doserrno(void)
  28 {
  29     return &(msvcrt_get_thread_data()->thread_doserrno);
  30 }
  31
  32 /*********************************************************************
  33  *              _get_errno (MSVCRT.@)
  34  */
  35 errno_t CDECL _get_errno(int *pValue)
  36 {
  37     if (!pValue)
  38         return EINVAL;
  39
  40     *pValue = *_errno();
  41     return 0;
  42 }
  43
  44 /*********************************************************************
  45  *              _get_doserrno (MSVCRT.@)
  46  */
  47 errno_t CDECL _get_doserrno(unsigned long *pValue)
  48 {
  49     if (!pValue)
  50         return EINVAL;
  51
  52     *pValue = *__doserrno();
  53     return 0;
  54 }
  55
  56 /*********************************************************************
  57  *              _set_errno (MSVCRT.@)
  58  */
  59 errno_t CDECL _set_errno(int value)
  60 {
  61     *_errno() = value;
  62     return 0;
  63 }
  64
  65 /*********************************************************************
  66  *              _set_doserrno (MSVCRT.@)
  67  */
  68 errno_t CDECL _set_doserrno(unsigned long value)
  69 {
  70     *__doserrno() = value;
  71     return 0;
  72 }
  73
  74 /*
  75  * This function sets both doserrno to the passed in OS error code
  76  * and also maps this to an appropriate errno code.  The mapping
  77  * has been deduced automagically by running this functions, which
  78  * exists in MSVCRT but is undocumented, on all the error codes in
  79  * winerror.h.
  80  */
  81 void CDECL _dosmaperr(unsigned long oserror)
  82 {
  83         int pos, base, lim;
  84
  85         _set_doserrno(oserror);
  86
  87         /* Use binary chop to find the corresponding errno code */
  88         for (base=0, lim=sizeof(doserrmap)/sizeof(doserrmap[0]); lim; lim >>= 1) {
  89                 pos = base+(lim >> 1);
  90                 if (doserrmap[pos].winerr == oserror) {
  91                         _set_errno(doserrmap[pos].en);
  92                         return;
  93                 } else if (doserrmap[pos].winerr < oserror) {
  94                         base = pos + 1;
  95                         --lim;
  96                 }
  97         }
  98         /* EINVAL appears to be the default */
  99         _set_errno(EINVAL);
 100 }
 101
 102 /******************************************************************************
 103 *              _set_error_mode (MSVCRT.@)
 104 *
 105 * Set the error mode, which describes where the C run-time writes error
 106 * messages.
 107 *
 108 * PARAMS
 109 *   mode - the new error mode
 110 *
 111 * RETURNS
 112 *   The old error mode.
 113 *
 114 */
 115 int msvcrt_error_mode = MSVCRT__OUT_TO_DEFAULT;
 116
 117 int CDECL _set_error_mode(int mode)
 118 {
 119     const int old = msvcrt_error_mode;
 120     if ( MSVCRT__REPORT_ERRMODE != mode ) {
 121         msvcrt_error_mode = mode;
 122     }
 123     return old;
 124 }
 125
 126 /******************************************************************************
 127  *              _seterrormode (MSVCRT.@)
 128  */
 129 void CDECL _seterrormode(int mode)
 130 {
 131     SetErrorMode( mode );
 132 }
 133
 134 /******************************************************************************
 135  *              _invalid_parameter (MSVCRT.@)
 136  */
 137 void __cdecl _invalid_parameter(const wchar_t *expr, const wchar_t *func,
 138                                 const wchar_t *file, unsigned int line, uintptr_t arg)
 139 {
 140     if (invalid_parameter_handler) invalid_parameter_handler( expr, func, file, line, arg );
 141     else
 142     {
 143         ERR( "%s:%u %s: %s %lx\n", debugstr_w(file), line, debugstr_w(func), debugstr_w(expr), arg );
 144         RaiseException( STATUS_INVALID_CRUNTIME_PARAMETER, EXCEPTION_NONCONTINUABLE, 0, NULL );
 145     }
 146 }
 147
 148 /* _get_invalid_parameter_handler - not exported in native msvcrt, added in msvcr80 */
 149 _invalid_parameter_handler CDECL _get_invalid_parameter_handler(void)
 150 {
 151     TRACE("\n");
 152     return invalid_parameter_handler;
 153 }
 154
 155 /* _set_invalid_parameter_handler - not exproted in native msvcrt, added in msvcr80 */
 156 _invalid_parameter_handler CDECL _set_invalid_parameter_handler(
 157         _invalid_parameter_handler handler)
 158 {
 159     _invalid_parameter_handler old = invalid_parameter_handler;
 160
 161     TRACE("(%p)\n", handler);
 162
 163     invalid_parameter_handler = handler;
 164     return old;
 165 }