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Reactos
1/***
2*errmode.c - modify __error_mode and __acrt_app_type
3*
4* Copyright (c) Microsoft Corporation. All rights reserved.
5*
6*Purpose:
7* Defines _set_error_mode() and _set_app_type(), the routines used
8* to modify __error_mode and __acrt_app_type variables. Together, these
9* two variables determine how/where the C runtime writes error
10* messages.
11*
12*******************************************************************************/
13
14#include <corecrt_internal.h>
15#include <stdlib.h>
16
17extern "C" {
18
19
20
21/*
22 * __error_mode, together with __acrt_app_type, determine how error messages
23 * are written out.
24 */
25static int __acrt_error_mode = _OUT_TO_DEFAULT;
26
27/***
28*int _set_error_mode(int modeval) - interface to change __error_mode
29*
30*Purpose:
31* Control the error (output) sink by setting the value of __error_mode.
32* Explicit controls are to direct output t o standard error (FILE * or
33* C handle or NT HANDLE) or to use the MessageBox API. This routine is
34* exposed and documented for the users.
35*
36*Entry:
37* int modeval = _OUT_TO_DEFAULT, error sink is determined by __acrt_app_type
38* _OUT_TO_STDERR, error sink is standard error
39* _OUT_TO_MSGBOX, error sink is a message box
40* _REPORT_ERRMODE, report the current __error_mode value
41*
42*Exit:
43* Returns old setting or -1 if an error occurs.
44*
45*Exceptions:
46*
47*******************************************************************************/
48
49int __cdecl _set_error_mode(int const new_error_mode)
50{
51 switch (new_error_mode)
52 {
53 case _OUT_TO_DEFAULT:
54 case _OUT_TO_STDERR:
55 case _OUT_TO_MSGBOX:
56 {
57 int const old_error_mode = __acrt_error_mode;
58 __acrt_error_mode = new_error_mode;
59 return old_error_mode;
60 }
61
62 case _REPORT_ERRMODE:
63 {
64 return __acrt_error_mode;
65 }
66
67 default:
68 {
69 _VALIDATE_RETURN(("Invalid error_mode", 0), EINVAL, -1);
70 }
71 }
72
73 return 0;
74}
75
76
77
78} // extern "C"