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djl_con.hxx
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djl_con.hxx
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#pragma once
#ifdef WATCOM
#include <conio.h>
#include <graph.h>
#include <dos.h>
class ConsoleConfiguration
{
private:
bool outputEstablished;
void (__interrupt __far * prev_int_23)();
static void __interrupt __far controlc_routine() {}
public:
ConsoleConfiguration() : outputEstablished( false ), prev_int_23( 0 ) {}
~ConsoleConfiguration() {}
void EstablishConsoleOutput( int16_t width = 80, int16_t height = 24 )
{
if ( outputEstablished )
return;
outputEstablished = true;
_setvideomode( 3 ); // 80x25 color text
// hook the ^C interrupt so the default handler doesn't terminate the app
prev_int_23 = _dos_getvect( 0x23 );
_dos_setvect( 0x23, controlc_routine );
} //EstablishConsoleOutput
static int portable_kbhit() { return kbhit(); }
static int throttled_kbhit() { return kbhit(); }
static int portable_getch() { return getch(); }
static char * portable_gets_s( char * buf, size_t bufsize ) { return gets( buf ); }
void RestoreConsoleInput()
{
if ( 0 != prev_int_23 )
{
_dos_setvect( 0x23, prev_int_23 );
prev_int_23 = 0;
}
} //RestoreConsoleInput
void RestoreConsoleOutput( bool clearScreen = true )
{
outputEstablished = false;
} //RestoreConsoleOutput
void RestoreConsole( bool clearScreen = true )
{
RestoreConsoleInput();
RestoreConsoleOutput( clearScreen );
} //RestoreConsole
bool IsOutputEstablished() { return outputEstablished; }
};
#else
#include <chrono>
using namespace std;
using namespace std::chrono;
class ConsoleConfiguration
{
private:
#ifdef _WIN32
HANDLE consoleOutputHandle;
HANDLE consoleInputHandle;
WINDOWPLACEMENT oldWindowPlacement;
CONSOLE_SCREEN_BUFFER_INFOEX oldScreenInfo;
DWORD oldOutputConsoleMode, oldInputConsoleMode;
CONSOLE_CURSOR_INFO oldCursorInfo;
int16_t setWidth;
UINT oldOutputCP;
static const size_t longestEscapeSequence = 10; // probably overkill
char aReady[ 1 + longestEscapeSequence ];
#else
#ifndef OLDGCC // the several-years-old Gnu C compiler for the RISC-V development boards
struct termios orig_termios;
#endif
#endif
bool inputEstablished, outputEstablished;
#ifdef _WIN32
// this function takes Windows keyboard input and produces Linux keyboard input
bool process_key_event( INPUT_RECORD & rec, char * pout )
{
*pout = 0;
if ( KEY_EVENT != rec.EventType )
return false;
if ( !rec.Event.KeyEvent.bKeyDown )
return false;
const uint8_t asc = rec.Event.KeyEvent.uChar.AsciiChar;
const uint8_t sc = (uint8_t) rec.Event.KeyEvent.wVirtualScanCode;
// don't pass back just an Alt/ctrl/shift/capslock without another character
if ( ( 0 == asc ) && ( 0x38 == sc || 0x1d == sc || 0x2a == sc || 0x3a == sc || 0x36 == sc ) )
return false;
bool fshift = ( 0 != ( rec.Event.KeyEvent.dwControlKeyState & SHIFT_PRESSED ) );
bool fctrl = ( 0 != ( rec.Event.KeyEvent.dwControlKeyState & ( LEFT_CTRL_PRESSED | RIGHT_CTRL_PRESSED ) ) );
bool falt = ( 0 != ( rec.Event.KeyEvent.dwControlKeyState & ( LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED ) ) );
tracer.Trace( " process key event sc/asc %02x%02x, shift %d, ctrl %d, alt %d\n", sc, asc, fshift, fctrl, falt );
// control+ 1, 3-5, and 7-0 should be swallowed. 2 and 6 are allowed.
if ( fctrl && ( 2 == sc || 4 == sc || 5 == sc || 6 == sc || 8 == sc || 9 == sc || 0xa == sc || 0xb == sc ) )
return false;
// control+ =, ;, ', `, ,, ., / should be swallowed
if ( fctrl && ( 0x0d == sc || 0x27 == sc || 0x28 == sc || 0x29 == sc || 0x33 == sc || 0x34 == sc || 0x35 == sc ) )
return false;
// alt+ these characters has no meaning
if ( falt && ( '\'' == asc || '`' == asc || ',' == asc || '.' == asc || '/' == asc || 0x4c == sc ) )
return false;
pout[ 0 ] = asc;
pout[ 1 ] = 0;
if ( falt && asc >= ' ' && asc <= 0x7f )
{
sprintf( pout, "\033%c", asc );
}
else if ( 0x01 == sc ) // ESC
{
// can't test on Windows if ( falt ) ;
}
else if ( 0x0e == sc ) // Backspace
{
if ( falt )
{
pout[ 0 ] = 0x1b;
pout[ 1 ] = 0x7f;
pout[ 2 ] = 0;
}
else if ( fctrl )
pout[ 0 ] = 8;
else
pout[ 0 ] = 0x7f; // shift and no shift
}
else if ( 0x0f == sc ) // Tab
{
// can't test on Windows if ( falt ) ;
// can't test on Windows else if ( fctrl ) ;
if ( fshift ) strcpy( pout, "\033[Z" );
}
else if ( 0x35 == sc ) // keypad /
{
if ( falt ) strcpy( pout, "\033/" );
else if ( fctrl ) *pout = 31;
}
else if ( 0x37 == sc ) // keypad *
{
if ( falt ) strcpy( pout, "\033*" );
else if ( fctrl ) *pout = 10;
}
else if ( sc >= 0x3b && sc <= 0x44 ) // F1 - F10
{
if ( falt )
{
if ( sc >= 0x3b && sc <= 0x3e )
sprintf( pout, "\033[1;3%c", sc - 0x3b + 80 );
else if ( sc == 0x3f )
strcpy( pout, "\033[15;3~" );
else if ( sc >= 0x40 && sc <= 0x42 )
sprintf( pout, "\033[1%c;3~", 55 + sc - 0x40 );
else if ( sc >= 0x43 && sc <= 0x44 )
sprintf( pout, "\033[2%c;3~", 48 + sc - 0x43 );
}
else if ( fctrl )
{
if ( sc >= 0x3b && sc <= 0x3e )
sprintf( pout, "\033[1;5%c", sc - 0x3b + 80 );
else if ( sc == 0x3f )
strcpy( pout, "\033[15;5~" );
else if ( sc >= 0x40 && sc <= 0x42 )
sprintf( pout, "\033[2%c;5~", 55 + sc - 0x40 );
else if ( sc >= 0x43 && sc <= 0x44 )
sprintf( pout, "\033[2%c;5~", 48 + sc - 0x43 );
}
else if ( fshift )
{
if ( sc >= 0x3b && sc <= 0x3e )
sprintf( pout, "\033[1;2%c", sc - 0x3b + 80 );
else if ( sc == 0x3f )
strcpy( pout, "\033[15;2~" );
else if ( sc >= 0x40 && sc <= 0x42 )
sprintf( pout, "\033[1%c;2~", 55 + sc - 0x40 );
else if ( sc >= 0x43 && sc <= 0x44 )
sprintf( pout, "\033[2%c;2~", 48 + sc - 0x43 );
}
else
{
if ( sc >= 0x3b && sc <= 0x3e )
sprintf( pout, "\033O%c", 80 + sc - 0x3b );
else if ( sc == 0x3f )
strcpy( pout, "\033[15~" );
else if ( sc >= 0x40 && sc <= 0x42 )
sprintf( pout, "\033[1%c~", 55 + sc - 0x40 );
else
sprintf( pout, "\033[2%c~", 48 + sc - 0x43 );
}
}
else if ( 0x47 == sc ) // Home
{
if ( falt ) strcpy( pout, "\033[1;3H" );
else if ( fctrl ) strcpy( pout, "\033[1;5H" );
else if ( fshift ) strcpy( pout, "\033[1;2H" );
else strcpy( pout, "\033[H" );
}
else if ( 0x48 == sc ) // up arrow
{
if ( falt ) strcpy( pout, "\033[1;3A" );
else if ( fctrl ) strcpy( pout, "\033[1;5A" );
else if ( fshift ) strcpy( pout, "\033[1;2A" );
else strcpy( pout, "\033[A" );
}
else if ( 0x49 == sc ) // page up
{
if ( falt ) strcpy( pout, "\033[5;3~" );
else if ( fctrl ) strcpy( pout, "\033[5;5~" );
else if ( fshift ) strcpy( pout, "\033[5;2~" );
else strcpy( pout, "\033[5~" );
}
else if ( 0x4a == sc ) // keypad -
{
if ( falt ) strcpy( pout, "\033-" );
// can't test on Windows else if ( fctrl ) ;
}
else if ( 0x4b == sc ) // left arrow
{
if ( falt ) strcpy( pout, "\033[1;3D" );
else if ( fctrl ) strcpy( pout, "\033[1;5D" );
else if ( fshift ) strcpy( pout, "\033[1;2D" );
else strcpy( pout, "\033[D" );
}
else if ( 0x4c == sc ) // keypad 5
{
// no output on Linux if ( fctrl ) ;
// no output on Linux else if ( fshift ) ;
}
else if ( 0x4d == sc ) // right arrow
{
if ( falt ) strcpy( pout, "\033[1;3C" );
else if ( fctrl ) strcpy( pout, "\033[1;5C" );
else if ( fshift ) strcpy( pout, "\033[1;2C" );
else strcpy( pout, "\033[C" );
}
else if ( 0x4e == sc ) // keypad +
{
if ( falt ) strcpy( pout, "\033+" );
else if ( fshift ) *pout = 43;
else if ( fctrl ) *pout = 43;
else *pout = 43;
}
else if ( 0x4f == sc ) // End
{
if ( falt ) strcpy( pout, "\033[1;3F" );
else if ( fctrl ) strcpy( pout, "\033[1;5F" );
else if ( fshift ) strcpy( pout, "\033[1;2F" );
else strcpy( pout, "\033[F" );
}
else if ( 0x50 == sc ) // down arrow
{
if ( falt ) strcpy( pout, "\033[1;3B" );
else if ( fctrl ) strcpy( pout, "\033[1;5B" );
else if ( fshift ) strcpy( pout, "\033[1;2B" );
else strcpy( pout, "\033[B" );
}
else if ( 0x51 == sc ) // page down
{
if ( falt ) strcpy( pout, "\033[6;3~" );
else if ( fctrl ) strcpy( pout, "\033[6;5~" );
else if ( fshift ) strcpy( pout, "\033[6;2~" );
else strcpy( pout, "\033[6~" );
}
else if ( 0x52 == sc ) // INS
{
if ( falt ) strcpy( pout, "\033[2;3~" );
else if ( fctrl ) strcpy( pout, "\033[2;5~" );
else if ( fshift ) ; // can't repro on windows
else strcpy( pout, "\033[2~" );
}
else if ( 0x53 == sc ) // Del
{
if ( falt ) strcpy( pout, "\033[3;3~" );
else if ( fctrl ) strcpy( pout, "\033[3;5~" );
else if ( fshift ) strcpy( pout, "\033[3;2~" );
else strcpy( pout, "\033[3~" );
}
else if ( 0x57 == sc || 0x58 == sc ) // F11 - F12
{
if ( falt ) sprintf( pout, "\033[2%c;3~", sc - 0x57 + 51 );
else if ( fctrl ) sprintf( pout, "\033[2%c;5~", sc - 0x57 + 51 );
else if ( fshift ) sprintf( pout, "\033[2%c;2~", sc - 0x57 + 51 );
else sprintf( pout, "\033[2%c~", 51 + sc - 0x57 );
}
return true;
} //process_key_event
#endif // _WIN32
public:
#ifdef _WIN32
ConsoleConfiguration() : oldOutputConsoleMode( 0 ), oldInputConsoleMode( 0 ),
setWidth( 0 ), oldOutputCP( 0 ),
inputEstablished( false ), outputEstablished( false )
{
oldWindowPlacement = {0};
oldScreenInfo = {0};
oldCursorInfo = {0};
consoleOutputHandle = GetStdHandle( STD_OUTPUT_HANDLE );
consoleInputHandle = GetStdHandle( STD_INPUT_HANDLE );
EstablishConsoleInput();
memset( aReady, 0, sizeof( aReady ) );
} //ConsoleConfiguration
#else
ConsoleConfiguration() : inputEstablished( false ), outputEstablished( false )
{
EstablishConsoleInput();
} //ConsoleConfiguration
#endif
~ConsoleConfiguration()
{
RestoreConsole();
}
bool IsOutputEstablished() { return outputEstablished; }
#ifdef _WIN32
HANDLE GetOutputHandle() { return consoleOutputHandle; };
HANDLE GetInputHandle() { return consoleInputHandle; };
#endif
void SetCursorInfo( uint32_t size ) // 0 to 100
{
#ifdef _WIN32
if ( 0 != consoleOutputHandle )
{
CONSOLE_CURSOR_INFO info = {0};
if ( 0 == size )
{
info.dwSize = 1;
info.bVisible = FALSE;
}
else
{
info.dwSize = size;
info.bVisible = TRUE;
}
SetConsoleCursorInfo( consoleOutputHandle, &info );
}
#else
if ( outputEstablished )
{
if ( 0 == size )
printf( "\x1b[?25l" );
else
printf( "\x1b[?25h" );
}
#endif
} //SetCursorInfo
void EstablishConsoleInput( void * pCtrlCRoutine = 0 )
{
if ( inputEstablished )
RestoreConsoleInput();
#ifdef _WIN32
GetConsoleMode( consoleOutputHandle, &oldInputConsoleMode );
if ( 0 == pCtrlCRoutine )
{
DWORD dwMode = oldInputConsoleMode;
dwMode &= ~ENABLE_PROCESSED_INPUT;
SetConsoleMode( consoleInputHandle, dwMode );
tracer.Trace( "old and new console input mode: %#x, %#x\n", oldInputConsoleMode, dwMode );
}
else
{
// don't automatically have ^c terminate the app. ^break will still terminate the app
PHANDLER_ROUTINE handler = (PHANDLER_ROUTINE) pCtrlCRoutine;
SetConsoleCtrlHandler( handler, TRUE );
}
#else
#ifndef OLDGCC // the several-years-old Gnu C compiler for the RISC-V development boards. that machine has no keyboard support
tcgetattr( 0, &orig_termios );
// make input raw so it's possible to peek to see if a keystroke is available
struct termios new_termios;
memcpy( &new_termios, &orig_termios, sizeof( new_termios ) );
cfmakeraw( &new_termios );
new_termios.c_oflag = orig_termios.c_oflag;
tcsetattr( 0, TCSANOW, &new_termios );
#endif
#endif
inputEstablished = true;
} //EstablishConsoleInput
void EstablishConsoleOutput( int16_t width = 80, int16_t height = 24 )
{
tracer.Trace( " EstablishConsoleOutput width %u height %u, outputEstablished %d\n", width, height, outputEstablished );
if ( outputEstablished )
return;
#ifdef _WIN32
GetConsoleCursorInfo( consoleOutputHandle, &oldCursorInfo );
if ( 0 != width )
{
oldWindowPlacement.length = sizeof oldWindowPlacement;
GetWindowPlacement( GetConsoleWindow(), &oldWindowPlacement );
oldOutputCP = GetConsoleOutputCP();
SetConsoleOutputCP( 437 );
oldScreenInfo.cbSize = sizeof oldScreenInfo;
GetConsoleScreenBufferInfoEx( consoleOutputHandle, &oldScreenInfo );
CONSOLE_SCREEN_BUFFER_INFOEX newInfo;
memcpy( &newInfo, &oldScreenInfo, sizeof newInfo );
setWidth = width;
newInfo.dwSize.X = width;
newInfo.dwSize.Y = height;
newInfo.dwMaximumWindowSize.X = width;
newInfo.dwMaximumWindowSize.Y = height;
newInfo.wAttributes = FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN;
// legacy DOS RGB values
newInfo.ColorTable[ 0 ] = 0;
newInfo.ColorTable[ 1 ] = 0x800000;
newInfo.ColorTable[ 2 ] = 0x008000;
newInfo.ColorTable[ 3 ] = 0x808000;
newInfo.ColorTable[ 4 ] = 0x000080;
newInfo.ColorTable[ 5 ] = 0x800080;
newInfo.ColorTable[ 6 ] = 0x008080;
newInfo.ColorTable[ 7 ] = 0xc0c0c0;
newInfo.ColorTable[ 8 ] = 0x808080;
newInfo.ColorTable[ 9 ] = 0xff0000;
newInfo.ColorTable[ 10 ] = 0x00ff00;
newInfo.ColorTable[ 11 ] = 0xffff00;
newInfo.ColorTable[ 12 ] = 0x0000ff;
newInfo.ColorTable[ 13 ] = 0xff00ff;
newInfo.ColorTable[ 14 ] = 0x00ffff;
newInfo.ColorTable[ 15 ] = 0xffffff;
SetConsoleScreenBufferInfoEx( consoleOutputHandle, &newInfo );
COORD newSize = { width, height };
SetConsoleScreenBufferSize( consoleOutputHandle, newSize );
}
DWORD dwMode = 0;
GetConsoleMode( consoleOutputHandle, &dwMode );
oldOutputConsoleMode = dwMode;
dwMode |= ( ENABLE_VIRTUAL_TERMINAL_PROCESSING | ENABLE_WINDOW_INPUT );
tracer.Trace( "old and new console output mode: %04x, %04x\n", oldOutputConsoleMode, dwMode );
SetConsoleMode( consoleOutputHandle, dwMode );
#else
if ( isatty( fileno( stdout ) ) )
{
printf( "%c[1 q", 27 ); // 1 == cursor blinking block.
fflush( stdout );
}
#endif
outputEstablished = true;
if ( 0 != width )
SendClsSequence();
} //EstablishConsoleOutput
void RestoreConsoleInput()
{
if ( inputEstablished )
{
#ifdef _WIN32
SetConsoleMode( consoleInputHandle, oldInputConsoleMode );
#else
#ifndef OLDGCC // the several-years-old Gnu C compiler for the RISC-V development boards
tcsetattr( 0, TCSANOW, &orig_termios );
#endif
#endif
inputEstablished = false;
}
} //RestoreConsoleInput
void RestoreConsoleOutput( bool clearScreen = true )
{
if ( outputEstablished )
{
#ifndef _WIN32
if ( isatty( fileno( stdout ) ) )
{
printf( "%c[0m", 27 ); // turn off display attributes
fflush( stdout );
}
#endif
if ( clearScreen )
SendClsSequence();
#ifdef _WIN32
SetConsoleOutputCP( oldOutputCP );
SetConsoleCursorInfo( consoleOutputHandle, & oldCursorInfo );
if ( 0 != setWidth )
{
SetConsoleScreenBufferInfoEx( consoleOutputHandle, & oldScreenInfo );
SetWindowPlacement( GetConsoleWindow(), & oldWindowPlacement );
}
SetConsoleMode( consoleOutputHandle, oldOutputConsoleMode );
#endif
outputEstablished = false;
}
} //RestoreConsoleOutput
void RestoreConsole( bool clearScreen = true )
{
RestoreConsoleInput();
RestoreConsoleOutput( clearScreen );
} //RestoreConsole
void SendClsSequence()
{
if ( isatty( fileno( stdout ) ) )
{
printf( "\x1b[2J" ); // clear the screen
printf( "\x1b[1G" ); // cursor to top line
printf( "\x1b[1d" ); // cursor to left side
fflush( stdout );
}
} //SendClsSequence
void ClearScreen()
{
#ifdef _WIN32
if ( 0 != consoleOutputHandle )
SendClsSequence();
else
{
HANDLE hcon = GetStdHandle( STD_OUTPUT_HANDLE );
DWORD dwMode = 0;
GetConsoleMode( hcon, &dwMode );
DWORD oldMode = dwMode;
dwMode |= ( ENABLE_VIRTUAL_TERMINAL_PROCESSING | ENABLE_WINDOW_INPUT );
SetConsoleMode( hcon, dwMode );
SendClsSequence();
SetConsoleMode( hcon, oldMode );
}
#else
SendClsSequence();
#endif
} //ClearScreen
int portable_kbhit()
{
int result = 0;
#ifdef _WIN32
if ( 0 != aReady[ 0 ] )
return true;
result = _kbhit();
#else
fd_set set;
FD_ZERO( &set );
FD_SET( STDIN_FILENO, &set );
struct timeval timeout = {0};
result = ( select( 1, &set, NULL, NULL, &timeout ) > 0 );
#endif
return result;
} //portable_kbhit
#ifdef _WIN32
// behave like getch() on linux -- extended characters have escape sequences
int linux_getch()
{
size_t cReady = strlen( aReady );
if ( 0 != cReady )
{
int result = aReady[ 0 ];
memmove( & aReady[ 0 ], & aReady[ 1 ], cReady ); // may just be the null termination
return result;
}
HANDLE hConsoleInput = GetStdHandle( STD_INPUT_HANDLE );
do
{
DWORD available = 0;
BOOL ok = GetNumberOfConsoleInputEvents( hConsoleInput, &available );
if ( ok && ( 0 != available ) )
{
INPUT_RECORD records[ 1 ];
DWORD numRead = 0;
ok = ReadConsoleInput( hConsoleInput, records, 1, &numRead );
if ( ok )
{
for ( DWORD x = 0; x < numRead; x++ )
{
char acSequence[ longestEscapeSequence ] = {0};
bool used = process_key_event( records[ x ], acSequence );
if ( !used )
continue;
strcat( aReady, acSequence );
tracer.Trace( " consumed sequence of length %zd, total cached len %zd\n", strlen( acSequence ), strlen( aReady ) );
}
}
}
if ( 0 != aReady[ 0 ] )
return linux_getch();
} while( true );
tracer.Trace( " bug in linux_getch; returning nothing\n" );
assert( false );
return 0;
} //linux_getch
#endif // _WIN32
static int portable_getch()
{
#ifdef _WIN32
return _getch();
#else
int r;
unsigned char c;
do
{
if ( ( r = read( 0, &c, sizeof( c ) ) ) < 0 )
return r;
if ( 0 != r ) // Linux platforms I tested wait for a char to be available. MacOS returns 0 immediately.
break;
//tracer.Trace( " sleeping in portable_getch()\n" );
sleep_ms( 1 );
} while( true );
return c;
#endif
} //portable_getch
bool throttled_kbhit()
{
// _kbhit() does device I/O in Windows, which sleeps for a tiny amount waiting for a reply, so
// compute-bound mbasic.com apps run 10x slower than they should because mbasic polls for keyboard input.
// Workaround: only call _kbhit() if 50 milliseconds has gone by since the last call.
static high_resolution_clock::time_point last_call = high_resolution_clock::now();
high_resolution_clock::time_point tNow = high_resolution_clock::now();
long long difference = duration_cast<std::chrono::milliseconds>( tNow - last_call ).count();
if ( difference > 50 )
{
last_call = tNow;
return portable_kbhit();
}
return false;
} //throttled_kbhit
static char * portable_gets_s( char * buf, size_t bufsize )
{
size_t len = 0;
do
{
char ch = (char) portable_getch();
if ( '\n' == ch || '\r' == ch )
{
printf( "\n" );
fflush( stdout ); // fflush is required on linux or it'll be buffered not seen until the app ends.
break;
}
if ( len >= ( bufsize - 1 ) )
break;
if ( 0x7f == ch || 8 == ch ) // backspace (it's not 8 for some reason)
{
if ( len > 0 )
{
printf( "\x8 \x8" );
fflush( stdout );
len--;
}
}
else
{
printf( "%c", ch );
fflush( stdout );
buf[ len++ ] = ch;
}
} while( true );
buf[ len ] = 0;
return buf;
} //portable_gets_s
}; //ConsoleConfiguration
#endif // WATCOM