reactos/lib/sdk/crt/conio/getch.c

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/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: lib/msvcrt/conio/getch.c
* PURPOSE: Writes a character to stdout
* PROGRAMER: Ariadne
* UPDATE HISTORY:
* 28/12/98: Created
*/
#include <precomp.h>
/*
* @implemented
*/
int _getch(void)
{
DWORD NumberOfCharsRead = 0;
char c;
HANDLE ConsoleHandle;
BOOL RestoreMode;
DWORD ConsoleMode;
if (char_avail) {
c = ungot_char;
char_avail = 0;
} else {
/*
* _getch() is documented to NOT echo characters. Testing shows it
* doesn't wait for a CR either. So we need to switch off
* ENABLE_ECHO_INPUT and ENABLE_LINE_INPUT if they're currently
* switched on.
*/
ConsoleHandle = (HANDLE) _get_osfhandle(stdin->_file);
RestoreMode = GetConsoleMode(ConsoleHandle, &ConsoleMode) &&
(0 != (ConsoleMode &
(ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT)));
if (RestoreMode) {
SetConsoleMode(ConsoleHandle,
ConsoleMode & (~ (ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT)));
}
ReadConsoleA((HANDLE)_get_osfhandle(stdin->_file),
&c,
1,
&NumberOfCharsRead,
NULL);
if (RestoreMode) {
SetConsoleMode(ConsoleHandle, ConsoleMode);
}
}
if (c == 10)
c = 13;
return c;
}