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04e0dc4a7a
Imported from https://www.nuget.org/packages/Microsoft.Windows.SDK.CRTSource/10.0.22621.3 License: MIT
78 lines
2 KiB
C++
78 lines
2 KiB
C++
/***
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*errmode.c - modify __error_mode and __acrt_app_type
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*
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* Copyright (c) Microsoft Corporation. All rights reserved.
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*
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*Purpose:
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* Defines _set_error_mode() and _set_app_type(), the routines used
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* to modify __error_mode and __acrt_app_type variables. Together, these
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* two variables determine how/where the C runtime writes error
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* messages.
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*
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*******************************************************************************/
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#include <corecrt_internal.h>
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#include <stdlib.h>
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extern "C" {
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/*
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* __error_mode, together with __acrt_app_type, determine how error messages
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* are written out.
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*/
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static int __acrt_error_mode = _OUT_TO_DEFAULT;
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/***
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*int _set_error_mode(int modeval) - interface to change __error_mode
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*
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*Purpose:
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* Control the error (output) sink by setting the value of __error_mode.
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* Explicit controls are to direct output t o standard error (FILE * or
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* C handle or NT HANDLE) or to use the MessageBox API. This routine is
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* exposed and documented for the users.
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*
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*Entry:
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* int modeval = _OUT_TO_DEFAULT, error sink is determined by __acrt_app_type
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* _OUT_TO_STDERR, error sink is standard error
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* _OUT_TO_MSGBOX, error sink is a message box
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* _REPORT_ERRMODE, report the current __error_mode value
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*
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*Exit:
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* Returns old setting or -1 if an error occurs.
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*
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*Exceptions:
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*
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*******************************************************************************/
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int __cdecl _set_error_mode(int const new_error_mode)
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{
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switch (new_error_mode)
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{
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case _OUT_TO_DEFAULT:
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case _OUT_TO_STDERR:
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case _OUT_TO_MSGBOX:
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{
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int const old_error_mode = __acrt_error_mode;
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__acrt_error_mode = new_error_mode;
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return old_error_mode;
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}
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case _REPORT_ERRMODE:
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{
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return __acrt_error_mode;
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}
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default:
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{
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_VALIDATE_RETURN(("Invalid error_mode", 0), EINVAL, -1);
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}
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}
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return 0;
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}
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} // extern "C"
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