/***
*errmode.c - modify __error_mode and __app_type
*
*       Copyright (c) Microsoft Corporation. All rights reserved.
*
*Purpose:
*       Defines _set_error_mode() and __set_app_type(), the routines used
*       to modify __error_mode and __app_type variables. Together, these
*       two variables determine how/where the C runtime writes error
*       messages.
*
*******************************************************************************/

#include <cruntime.h>
#include <internal.h>
#include <stdlib.h>

/***
*int _set_error_mode(int modeval) - interface to change __error_mode
*
*Purpose:
*       Control the error (output) sink by setting the value of __error_mode.
*       Explicit controls are to direct output t o standard error (FILE * or
*       C handle or NT HANDLE) or to use the MessageBox API. This routine is
*       exposed and documented for the users.
*
*Entry:
*       int modeval =   _OUT_TO_DEFAULT, error sink is determined by __app_type
*                       _OUT_TO_STDERR,  error sink is standard error
*                       _OUT_TO_MSGBOX,  error sink is a message box
*                       _REPORT_ERRMODE, report the current __error_mode value
*
*Exit:
*       Returns old setting or -1 if an error occurs.
*
*Exceptions:
*
*******************************************************************************/

_CRTIMP int __cdecl _set_error_mode (
        int em
        )
{
        int retval=0;

#if defined (CRTDLL) && !defined (_SYSCRT)
        if (_set_errmode_server != _encoded_null())
            return ((_set_error_mode_function) _decode_pointer(_set_errmode_server))(em);
#endif  /* defined (CRTDLL) && !defined (_SYSCRT) */
        switch (em) {
            case _OUT_TO_DEFAULT:
            case _OUT_TO_STDERR:
            case _OUT_TO_MSGBOX:
                retval = __error_mode;
                __error_mode = em;
                break;
            case _REPORT_ERRMODE:
                retval = __error_mode;
                break;
            default:
                _VALIDATE_RETURN(("Invalid error_mode", 0), EINVAL, -1);
        }

        return retval;
}

/***
*void __set_app_type(int apptype) - interface to change __app_type
*
*Purpose:
*       Set, or change, the value of __app_type.
*
*       Set the default debug lib report destination for console apps.
*
*       This function is for INTERNAL USE ONLY.
*
*Entry:
*       int modeval =   _UNKNOWN_APP,   unknown
*                       _CONSOLE_APP,   console, or command line, application
*                       _GUI_APP,       GUI, or Windows, application
*
*Exit:
*
*Exceptions:
*
*******************************************************************************/

_CRTIMP void __cdecl __set_app_type (
        int at
        )
{
#if defined (CRTDLL) && !defined (_SYSCRT)
    if (__set_app_type_server != _encoded_null())
        ((_set_app_type_function) _decode_pointer(__set_app_type_server))(at);
#endif  /* defined (CRTDLL) && !defined (_SYSCRT) */
        __app_type = at;
}

/***
*int __get_app_type() - interface to retreive __app_type
*
*Purpose:
*       Get, the value of __app_type.
*
*       Get the default debug lib report destination for console apps.
*
*       This function is for INTERNAL USE ONLY.
*
*Exit:
*       int retval  =   _UNKNOWN_APP,   unknown
*                       _CONSOLE_APP,   console, or command line, application
*                       _GUI_APP,       GUI, or Windows, application
*
*
*Exceptions:
*
*******************************************************************************/

_CRTIMP int __cdecl __get_app_type ()
{
#if defined (CRTDLL) && !defined (_SYSCRT)
    if (__get_app_type_server != _encoded_null())
        return ((_get_app_type_function) _decode_pointer(__get_app_type_server))();
#endif  /* defined (CRTDLL) && !defined (_SYSCRT) */
    return __app_type;
}