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/* Copyright (c) 1992, 1995 John E. Davis
* All rights reserved.
*
* You may distribute under the terms of either the GNU General Public
* License or the Perl Artistic License.
*/
#include "config.h"
#include <stdio.h>
#include <windows.h>
#include <winbase.h>
#include "slang.h"
#include "_slang.h"
#ifdef __cplusplus
# define _DOTS_ ...
#else
# define _DOTS_ void
#endif
/*----------------------------------------------------------------------*\
* Function: static void set_ctrl_break (int state);
*
* set the control-break setting
\*----------------------------------------------------------------------*/
static void set_ctrl_break (int state)
{
}
/*----------------------------------------------------------------------*\
* Function: int SLang_init_tty (int abort_char, int no_flow_control,
* int opost);
*
* initialize the keyboard interface and attempt to set-up the interrupt 9
* handler if ABORT_CHAR is non-zero.
* NO_FLOW_CONTROL and OPOST are only for compatiblity and are ignored.
\*----------------------------------------------------------------------*/
HANDLE hStdout, hStdin;
CONSOLE_SCREEN_BUFFER_INFO csbiInfo;
int SLang_init_tty (int abort_char, int no_flow_control, int opost)
{
SMALL_RECT windowRect;
COORD newPosition;
long flags;
#ifndef SLANG_SAVES_CONSOLE
/* first off, create a new console so the old one can be restored on exit */
HANDLE console = CreateConsoleScreenBuffer(GENERIC_READ | GENERIC_WRITE,
FILE_SHARE_READ |FILE_SHARE_WRITE,
0,
CONSOLE_TEXTMODE_BUFFER,
0);
if (SetConsoleActiveScreenBuffer(console) == FALSE) {
return -1;
}
#endif
/* start things off at the origin */
newPosition.X = 0;
newPosition.Y = 0;
/* still read in characters from stdin, but output to the new console */
/* this way, on program exit, the original screen is restored */
hStdin = GetStdHandle(STD_INPUT_HANDLE);
/* hStdin = console; */
#ifndef SLANG_SAVES_CONSOLE
hStdout = GetStdHandle(STD_OUTPUT_HANDLE);
#else
hStdout = console;
#endif
if (hStdin == INVALID_HANDLE_VALUE || hStdout == INVALID_HANDLE_VALUE) {
return -1; /* failure */
}
if (!GetConsoleScreenBufferInfo(hStdout, &csbiInfo)) {
return -1; /* failure */
} // if
windowRect.Left = 0;
windowRect.Top = 0;
windowRect.Right = csbiInfo.dwSize.X - 1;
windowRect.Bottom = csbiInfo.dwSize.Y - 1;
if (!SetConsoleWindowInfo(hStdout, TRUE, &windowRect)) {
return -1;
}
if (SetConsoleMode(hStdin, 0) == FALSE) {
return -1; /* failure */
}
if (SetConsoleMode(hStdout, 0) == FALSE) {
return -1; /* failure */
}
if (GetConsoleMode(hStdin, &flags)) {
if (flags & ENABLE_PROCESSED_INPUT) {
return -1;
}
}
(void) SetConsoleCursorPosition(hStdout, newPosition);
/* success */
return 0;
} /* SLang_init_tty */
/*----------------------------------------------------------------------*\
* Function: void SLang_reset_tty (void);
*
* reset the tty before exiting
\*----------------------------------------------------------------------*/
void SLang_reset_tty (void)
{
set_ctrl_break (1);
}
/*----------------------------------------------------------------------*\
* Function: int SLsys_input_pending (int tsecs);
*
* sleep for *tsecs tenths of a sec waiting for input
\*----------------------------------------------------------------------*/
int SLsys_input_pending (int tsecs)
{
INPUT_RECORD record;
long one = 1;
long bytesRead;
while (1)
{
if (PeekConsoleInput(hStdin, &record, 1, &bytesRead))
{
if (bytesRead == 1)
{
if ((record.EventType == KEY_EVENT)
&& record.Event.KeyEvent.bKeyDown)
{
/* ok, there is a keypress here */
return 1;
}
else
{
/* something else is here, so read it and try again */
(void) ReadConsoleInput(hStdin, &record, 1, &bytesRead);
}
}
else
{
/* no Pending events */
return 0;
}
}
else
{
/* function failed */
return 0;
}
}
#if 0
/* no delays yet */
/* use Sleep */
/*
int count = tsecs * 5;
if (keyWaiting()) return 1;
while (count > 0)
{
delay (20); 20 ms or 1/50 sec
if (keyWaiting()) break;
count--;
}
return (count);
*/
#endif
}
/*----------------------------------------------------------------------*\
* Function: unsigned int SLsys_getkey (void);
*
* wait for and get the next available keystroke.
* Also re-maps some useful keystrokes.
*
* Backspace (^H) => Del (127)
* Ctrl-Space => ^@ (^@^3 - a pc NUL char)
* extended keys are prefixed by a null character
\*----------------------------------------------------------------------*/
unsigned int SLsys_getkey (void)
{
unsigned int scan, ch, shift;
long key, bytesRead;
INPUT_RECORD record;
while (1) {
if (!ReadConsoleInput(hStdin, &record, 1, &bytesRead)) {
return 0;
}
if (record.EventType == KEY_EVENT && record.Event.KeyEvent.bKeyDown) {
#ifndef __MINGW32__
return record.Event.KeyEvent.uChar.AsciiChar;
#else
return record.Event.KeyEvent.AsciiChar;
#endif
}
}
/* ReadFile(hStdin, &key, 1, &bytesRead, NULL); */
/* return key; */
}
/*----------------------------------------------------------------------*\
* Function: void SLang_set_abort_signal (void (*handler)(int));
\*----------------------------------------------------------------------*/
void SLang_set_abort_signal (void (*handler)(int))
{
}
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