74 lines
1.8 KiB
C++
74 lines
1.8 KiB
C++
#include "../nasal.h"
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#include <iostream>
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#ifdef _WIN32
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#include <conio.h>
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#else
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#include <fcntl.h>
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#include <termios.h>
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#endif
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#ifndef _WIN32
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static struct termios init_termios;
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static struct termios new_termios;
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static int peek_char=-1;
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int kbhit(){
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unsigned char ch=0;
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int nread=0;
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if(peek_char!=-1)
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return 1;
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int flag=fcntl(0,F_GETFL);
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fcntl(0,F_SETFL,flag|O_NONBLOCK);
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nread=read(0,&ch,1);
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fcntl(0,F_SETFL,flag);
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if(nread==1){
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peek_char=ch;
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return 1;
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}
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return 0;
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}
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int getch(){
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int ch=0;
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if(peek_char!=-1){
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ch=peek_char;
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peek_char=-1;
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return ch;
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}
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read(0,&ch,1);
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return ch;
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}
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#endif
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extern "C" nasal_ref nas_getch(std::vector<nasal_ref>& args,nasal_gc& gc){
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return {vm_num,(double)getch()};
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}
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extern "C" nasal_ref nas_kbhit(std::vector<nasal_ref>& args,nasal_gc& gc){
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return {vm_num,(double)kbhit()};
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}
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extern "C" nasal_ref nas_noblock(std::vector<nasal_ref>& args,nasal_gc& gc){
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if(kbhit())
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return {vm_num,(double)getch()};
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return nil;
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}
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extern "C" nasal_ref nas_init(std::vector<nasal_ref>& args,nasal_gc& gc){
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#ifndef _WIN32
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tcflush(0,TCIOFLUSH);
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tcgetattr(0,&init_termios);
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new_termios=init_termios;
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new_termios.c_lflag&=~(ICANON|ECHO|ECHONL|ECHOE);
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// vmin=0 is nonblock input, but in wsl there is a bug that will block input
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// so we use fcntl to write the nonblock input
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new_termios.c_cc[VMIN]=1;
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new_termios.c_cc[VTIME]=0;
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tcsetattr(0,TCSANOW,&new_termios);
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#endif
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return nil;
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}
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extern "C" nasal_ref nas_close(std::vector<nasal_ref>& args,nasal_gc& gc){
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#ifndef _WIN32
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tcflush(0,TCIOFLUSH);
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tcsetattr(0,TCSANOW,&init_termios);
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#endif
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return nil;
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} |