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lowl.cc
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lowl.cc
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/*
* This file is part of zed, the simple, powerful, fast, small
* text editor (c) 1997 by Sandro Serafini.
* The author may be contacted by his email address,
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
/* lowl.cc - modulo con le funzioni a basso livello */
//#define SUPERDEBUG
/***************************************************************************/
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <unistd.h>
#include <fcntl.h>
#include <limits.h>
#include <errno.h>
#include <regex.h>
#include <sys/stat.h>
#ifdef X11
#include <X11/Xlib.h>
#endif
#ifdef _AIX
#include <sys/select.h>
#include <strings.h>
#endif
#include "zed.h"
#ifdef MSDOS
#include <dir.h>
#include <dos.h>
#include <sys\stat.h>
#include <sys\time.h>
#include <errno.h>
#include <go32.h>
#include <sys\farptr.h>
#include <dpmi.h>
#endif
#ifdef UNIX
#include <sys/ioctl.h>
#include <sys/time.h>
// #include <sys/types.h>
#include <termios.h>
struct termios ot0,ot1,nt0,nt1;
#endif
int pattr=1000;
#ifdef X11
#include <X11/keysym.h>
#endif
/***************************************************************************/
//int scx,scy,scx1,scy1; // Save Cursor position
int crx,cry; // posizione del cursore corrente
int goline(int &l,char *str,int i);
void addmacro(unsigned char cmd,char chr);
char *hints[]=
{
"Hint: An empty string brings up the file selector.",
"Hint: A directory name or some wildcard brings up the file selector.",
"Example: Type \"*.cc *.h\" to select one (or all) your .cc and .h files.",
"Hint: Type \"<g\" as filename to select your local config file.",
"Hint: Zed is simple to configure.",
"Hint: You can go to a certain C function asking Zed to list them (g_function).",
"Hint: Type \"<h\" as filename to select the help.",
"Hint: you can shift left or right the lines within a block (b_shl,b_shr).",
"Hint: read zed.doc file!",
#ifdef UNIX
"Hint: You can exec a command in background and redirect its output to a window",
#endif
#ifdef __linux
"Note: if you use Zed in a remote text terminal, shiftstatus can\'t be retrieved.",
#endif
#if defined __linux || X11
"Hint: You want that shift-escape + alt-shift-$ exits Zed? Simply configure it!",
#endif
"Hint: Try document mode on paragraphs of quoted lines of mail or news.",
"Hint: b_toggle to toggle block mode between normal and column.",
"Hint: e_stmacro to create a runtime macro; e_wrmacro to save it to a file.",
0
};
/***************************************************************************/
void _getcwd(char *path,int max,char drive)
{
path[0]='\0';
if (drive==0)
{ if (!getcwd(path,max)) path[0]='\0'; }
#ifdef MSDOS
else
{
int sd=getdisk(); // save drive
int dto=toupper(drive)-'A';
if (setdisk(getdisk())<dto) path[0]='\0';
else
{
setdisk(dto);
if (!getcwd(path,max)) path[0]='\0';
setdisk(sd);
}
}
if (path[0]!='\0' && path[1]!=':')
{ output("getcwd without drive!\n"); exit(100); }
#endif
}
#ifdef MSDOS
int _chdir(char *path)
{
int err=0;
if (path[1]==':')
{
int dto=toupper(path[0])-'A';
if (setdisk(getdisk())<dto) err=1;
else
{
setdisk(dto);
err=chdir(path+2);
}
} else err=chdir(path);
return(err);
}
#endif
/***************************************************************************/
void preinit(void)
{
#if defined UNIX && !defined X11
tcgetattr(0,&ot0); tcgetattr(0,&nt0);
tcgetattr(1,&ot1); tcgetattr(1,&nt1);
nt0.c_lflag=0;
nt0.c_iflag=0;
nt0.c_oflag=0;
nt0.c_cc[VMIN]=1;
nt0.c_cc[VTIME]=0;
tcsetattr(0,TCSANOW,&nt0);
nt1.c_lflag=0;
nt1.c_iflag=0;
nt1.c_oflag=0;
nt1.c_cc[VMIN]=1;
nt1.c_cc[VTIME]=0;
tcsetattr(1,TCSANOW,&nt1);
#endif
#ifdef SUPERDEBUG
unlink("/tmp/savekeys");
#endif
}
/***************************************************************************/
void myput(char *str,int y)
{
int i,l=strlen(str);
for (i=0; i<l; i++)
putchr(str[i]^0xaa,i,y,config.col[6]);
}
/***************************************************************************/
int init(int upd)
{
int nmx,nmy;
if (upd && config.fixx && config.fixy) return(0);
#ifdef MSDOS
vidsel=_go32_conventional_mem_selector();
vidoff=_go32_info_block.linear_address_of_primary_screen&0xfffff;
vidmyds=_go32_my_ds();
// if (config.ansi==0 && _go32_info_block.run_mode==_GO32_RUN_MODE_DPMI)
config.ansi=128; // correggo caso DPMI
nmx=_farpeekb(vidsel,0x44a);
nmy=_farpeekb(vidsel,0x484)+1;
#elif defined X11
nmx=MyWinInfo.cwidth; nmy=MyWinInfo.cheight;
#else
struct winsize wind_struct;
if ((-1==ioctl(0,TIOCGWINSZ,&wind_struct))
&& (-1==ioctl(1,TIOCGWINSZ,&wind_struct))
&& (-1==ioctl(2,TIOCGWINSZ,&wind_struct)))
{ nmy=0; nmx=0; }
else
{ nmx=(int)wind_struct.ws_col; nmy=(int)wind_struct.ws_row; }
if (nmx==0)
{
char *p;
p=getenv("COLUMNS");
if (p==0) { output("\n\rPlease set/export $COLUMNS/$LINES !\n\r"); return(1); }
else nmx=atoi(p);
}
if (nmy==0)
{
char *p;
p=getenv("LINES");
if (p==0) { output("\n\rPlease set/export $LINES !\n\r"); return(1); }
else nmy=atoi(p);
}
#endif
if (upd)
if (!((!config.fixx && config.maxx!=nmx)
|| (!config.fixy && config.maxy!=nmy))) return(0);
if (nmx<80 || nmy<4 || nmx>MAXVIDX)
{
if (config.ansi>0 && config.ansi<128) output("\x1b[0;10m\x1b[2J");
if (nmx<=MAXVIDX)
{
output("Text window too little(");
outint(nmx);
output("x");
outint(nmy);
output("), min 80x4\n\r");
}
else
{
output("Text window too big(");
outint(nmx);
output("x");
outint(nmy);
output("), max ");
outint(MAXVIDX-2);
output(" columns\n\r");
}
if (!upd)
{
deinit();
exit(2);
}
else
{ output("Please Resize !\n\r"); return(-1); }
}
if (!config.fixx) config.maxx=nmx;
if (!config.fixy) config.maxy=nmy;
if (upd)
{
#ifdef MSDOS
if (config.ansi) { delete vbuf; }
#else
delete vbuf;
#endif
delete avideo;
delete astat;
}
vbuf=0; avideo=0; astat=0;
#ifdef MSDOS
if (config.ansi)
{
#endif
if (((vbuf=(short int *)calloc(config.maxx*config.maxy,2))==0) ||
((avideo=(short int *)calloc(config.maxx*config.maxy,2))==0) ||
((astat=(_modif *)calloc(sizeof(_modif),config.maxy+1))==0))
{ output("NoMem!\n"); deinit(); exit(1); }
int i;
for (i=0; i<config.maxy; i++)
{ astat[i].modif=1; astat[i].da=0; astat[i].a=config.maxx-1; }
#ifdef MSDOS
}
else
{
vbuf=(short int *)
((_go32_info_block.linear_address_of_primary_screen&0xfffff)|0xe0000000);
}
#endif
clearscr();
block.blk=0;
#if !defined X11
if (upd) while(querykey()) gettst3();
#endif
return(0);
}
/***************************************************************************/
void printlogo(void)
{
static char *titl[9]=
{
" ______",
"[____ ] _ _______________________",
" / / _ _ ||",
" / / / \\ / \\|| MsDos & Unix editor",
" / / ( __)( | by Sandro Serafini",
" / /___ \\__ \\_/_| (c) 1995-97",
"[______] _______________________",
" Press F1 for help",
0
};
int i;
for (i=0; titl[i]; i++)
{
putstr(titl[i],0,3,i+4,config.col[6]);
}
putstr(retversion(),0,14,10,config.col[5]);
struct timeval tv;
for (i=0; hints[i]; i++);
gettimeofday(&tv,NULL);
srandom(tv.tv_sec);
putstr(hints[random()%i],0,0,13,config.col[1]);
#ifndef X11
char *p;
switch(config.ansi)
{
case 0 : p="Direct mode"; break;
case 1 : p="Ansi color mode"; break;
case 2 : p="Ansi mono mode"; break;
case 3 : p="VT100/linux mode"; break;
case 128:p="DPMI mode"; break;
default: p="Unknow mode"; break;
}
putstr(p,0,26,10,config.col[6]);
#else
putstr("X11 mode",0,26,10,config.col[6]);
#endif
}
/***************************************************************************/
void deinit(void)
{
#if defined UNIX && !defined X11
tcsetattr(0, TCSANOW, &ot0);
tcsetattr(1, TCSANOW, &ot1);
#endif
}
/***************************************************************************/
// se update=1 riscrive il cursore
// se update=2 cancella il cursore
void vsetcur(int x,int y,int update)
{
if (stopupdate) return;
if (update) { x=crx; y=cry; }
#ifdef MSDOS
if (config.ansi>0 && config.ansi<128)
{
#endif
#if defined X11
int xx,yy;
int ch;
char str[2];
if (zedmapped)
{
yy=cry*MyWinInfo.fheight+MyWinInfo.fascent;
xx=crx*MyWinInfo.fwidth;
ch=avideo[cry*config.maxx+crx];
if (ch!=-1)
{
str[0]=ch&0xff; str[1]='\0';
if ((ch&0x4000)==0)
XDrawImageString(display,zed_win,gcontext[((ch&0xff00)>>8)],xx,yy,str,1);
}
if (update!=2)
{
yy=y*MyWinInfo.fheight+MyWinInfo.fascent;
xx=x*MyWinInfo.fwidth;
ch=avideo[y*config.maxx+x];
str[0]=ch&0xff; str[1]='\0';
if ((ch&0x4000)==0)
{
XDrawImageString(display,zed_win,gcursor,xx,yy,str,1);
}
} else ch=-1;
}
#else
char strout[20];
sprintf(strout,"\x1b[%i;%iH",y+1,x+1);
outansi(strout);
#endif
#ifdef MSDOS
}
else
{
_go32_dpmi_registers regs;
regs.x.dx=x;
regs.x.ax=y;
regs.h.dh=regs.h.al;
regs.h.ah=0x2;
regs.h.bh=0;
regs.x.ss=regs.x.sp=0;
_go32_dpmi_simulate_int(0x10,®s);
}
#endif
crx=x; cry=y;
}
/***************************************************************************/
void vsavecur(int *scx,int *scy)
{
*scx=crx; *scy=cry;
}
/***************************************************************************/
void vrestcur(int &scx,int &scy)
{
vsetcur(scx,scy);
}
/***************************************************************************/
// sistema una linea (ansi mode)
int goline(int &l,char *str,int i)
{
int l2,j;
l2=config.maxx*i;
if (astat[i].modif==1)
{
for (j=astat[i].da; j<=astat[i].a; j++)
if (vbuf[l2+j]==avideo[l2+j]) astat[i].da++; else break;
for (j=astat[i].a; j>=astat[i].da; j--)
if (vbuf[l2+j]==avideo[l2+j]) astat[i].a--; else break;
if (astat[i].da>astat[i].a) astat[i].modif=0;
}
if (config.whole) { astat[i].da=0; astat[i].a=config.maxx-1; }
if (astat[i].modif)
{
#ifdef X11
l=0;
str=0; // make gcc HAPPY
int xx,yy;
char xstr[MAXVIDX+1];
int cgc,len;
if (zedmapped && (astat[i].modif==2 || !querykey()))
{
yy=i*MyWinInfo.fheight+MyWinInfo.fascent;
xx=astat[i].da*MyWinInfo.fwidth;
xstr[1]='\0';
cgc=vbuf[l2+astat[i].da]&0xff00; len=0;
for (j=astat[i].da; j<=astat[i].a; j++)
{
int dow=0,next=-1;
xstr[len++]=vbuf[l2+j]&0xff;
if (astat[i].a==j) dow=1; else
{ next=vbuf[l2+j+1]; if (cgc!=(next&0xff00)) dow=1; }
if (dow)
{
if ((cgc&0x4000)==0)
{
XDrawImageString(display,zed_win,gcontext[cgc>>8],xx,yy,xstr,len);
xx+=MyWinInfo.fwidth*len;
len=0;
}
else
{
int k;
for (k=0; k<len; k++)
{
int y2=yy-MyWinInfo.fascent;
GC gt=gcontext[(cgc>>8)&0x3f];
int dx=MyWinInfo.fwidth;
int dy=MyWinInfo.fheight;
XClearArea(display,zed_win,xx,y2,dx,dy,False);
if (dx>=6 && dy>=6)
{
switch(xstr[k])
{
case 1:
XDrawRectangle(display,zed_win,gt,xx+2,y2+2,dx-3, 1);
XDrawRectangle(display,zed_win,gt,xx+2,y2+2, 1,dy-3);
break;
case 2:
XDrawRectangle(display,zed_win,gt,xx ,y2+2,dx-3, 1);
XDrawRectangle(display,zed_win,gt,xx+dx-4,y2+2, 1,dy-3);
break;
case 3:
XDrawRectangle(display,zed_win,gt,xx+2,y2+dy-4,dx-3, 1);
XDrawRectangle(display,zed_win,gt,xx+2,y2, 1,dy-3);
break;
case 4:
XDrawRectangle(display,zed_win,gt,xx ,y2+dy-4,dx-3, 1);
XDrawRectangle(display,zed_win,gt,xx+dx-4,y2, 1,dy-3);
break;
case 5:
XDrawRectangle(display,zed_win,gt,xx+2,y2, 1,dy-1);
break;
case 6:
XDrawRectangle(display,zed_win,gt,xx+dx-4,y2, 1,dy-1);
break;
case 7:
XDrawRectangle(display,zed_win,gt,xx ,y2+2,dx-1, 1);
break;
case 8:
XDrawRectangle(display,zed_win,gt,xx ,y2+dy-4,dx-1, 1);
break;
default:
XFillRectangle(display,zed_win,gt,xx,y2,dx,dy);
break;
}
} else XFillRectangle(display,zed_win,gt,xx,y2,dx,dy);
xx+=MyWinInfo.fwidth;
}
len=0;
}
}
if (next!=-1) cgc=next&0xff00;
avideo[l2+j]=vbuf[l2+j]; astat[i].da++;
}
if (astat[i].da>astat[i].a) astat[i].modif=0;
}
#else
if (i==config.maxy-1)
{
if (astat[i].a==config.maxx-1) astat[i].a--;
if (astat[i].da>astat[i].a) astat[i].da--;
}
sprintf(str+l,"\x1b[%i;%iH",i+1,astat[i].da+1);
l+=strlen(str+l);
l2=i*config.maxx;
for (j=astat[i].da; j<=astat[i].a; j++)
{
int attr;
attr=((*(vbuf+l2+j))&0xff00)>>8;
if (attr==0) attr=-config.col[4];
if (attr==0x11) attr=-config.col[9];
if (config.ansi!=3 && attr<0) attr=-attr;
if (attr!=pattr || pattr==1000)
{
str[l++]=0x1b; str[l++]='['; str[l++]='0'; str[l++]=';';
if (pattr<0 && attr>0)
{
str[l++]='1'; str[l++]='0'; str[l++]=';';
}
else
if (pattr>0 && attr<0)
{
str[l++]='1'; str[l++]='1'; str[l++]=';';
}
pattr=attr;
if (attr<0) attr=-attr;
if (config.ansi==1 || config.ansi==3) // color ansi ?
{ // color
if (attr&0x08) { str[l++]='1'; str[l++]=';'; }
str[l++]='3';
switch(attr&0x7)
{
case 0 : str[l]='0'; break;
case 1 : str[l]='4'; break;
case 2 : str[l]='2'; break;
case 3 : str[l]='6'; break;
case 4 : str[l]='1'; break;
case 5 : str[l]='5'; break;
case 6 : str[l]='3'; break;
case 7 : str[l]='7'; break;
}
l++; str[l++]=';'; str[l++]='4';
switch(attr&0x70)
{
case 0x00 : str[l]='0'; break;
case 0x10 : str[l]='4'; break;
case 0x20 : str[l]='2'; break;
case 0x30 : str[l]='6'; break;
case 0x40 : str[l]='1'; break;
case 0x50 : str[l]='5'; break;
case 0x60 : str[l]='3'; break;
case 0x70 : str[l]='7'; break;
}
l++;
}
else
{ // monocrome
if (attr&0x01) { str[l++]='1'; str[l++]=';'; }
if (attr&0x02) { str[l++]='2'; str[l++]=';'; }
if (attr&0x04) { str[l++]='4'; str[l++]=';'; }
if (attr&0x08) { str[l++]='5'; str[l++]=';'; }
if (attr&0x10) { str[l++]='7'; str[l++]=';'; }
l--;
}
str[l++]='m';
}
str[l++]=(*(vbuf+l2+j))&0xff;
avideo[l2+j]=vbuf[l2+j]; astat[i].da++;
if (l>80)
{
str[l]='\0'; outansi(str); l=0;
if (querykey()) { j=config.maxx+10; return(1); }
}
}
if (astat[i].da>astat[i].a) astat[i].modif=0;
#endif
}
return(0);
}
/***************************************************************************/
// forza ok la riga di stato (ansi mode)
void okstatus(int i)
{
if (config.ansi>0 && config.ansi<128)
{
int l;
char str[256];
if (pattr<0 && config.ansi>0 && config.ansi<128) output("\x1b[10m");
l=0; pattr=1000;
goline(l,str,i);
if (l==0) vsetcur(crx,cry);
if (l>0) { str[l]='\0'; outansi(str); vsetcur(crx,cry); }
}
#ifdef MSDOS
else if (config.ansi==128)
{
int l,da;
l=config.maxx*i;
da=astat[i].da;
if (astat[i].modif)
{
movedata(vidmyds,(unsigned int)&vbuf[l+da],vidsel,vidoff+(l+da)*2,(astat[i].a-da+1)*2);
astat[i].modif=0;
}
}
#endif
#ifdef X11
XFlush(display);
#endif
}
/***************************************************************************/
void refresh(void)
{
if (config.ansi>0 && config.ansi<128)
{
#ifndef X11
int i,l;
char str[120];
if (pattr<0 && config.ansi>0 && config.ansi<128) output("\x1b[10m");
l=0; pattr=1000;
if (!querykey())
{
for (i=0; i<config.maxy; i++)
if (goline(l,str,i)) i=config.maxy+10;
if (l==0) vsetcur(crx,cry);
}
if (l>0) { str[l]='\0'; outansi(str); vsetcur(crx,cry); }
#else
int i,l=0;
for (i=0; i<config.maxy; i++) goline(l,0,i);
vsetcur(crx,cry);
#endif
}
#ifdef MSDOS
else if (config.ansi==128)
{
int l,da;
l=0;
if (!querykey())
{
for (int i=0; i<config.maxy; i++)
{
da=astat[i].da;
if (astat[i].modif)
{
movedata(vidmyds,(unsigned int)&vbuf[l+da],vidsel,vidoff+(l+da)*2,(astat[i].a-da+1)*2);
astat[i].modif=0;
}
l+=config.maxx;
}
}
}
#endif
}
/***************************************************************************/
// ret speciali:
// ffffffff abortire il dialog
// fffffffe evento di X : uscita nulla
// fffffffd esecuzione comando interno
// fffffffc eseguito il clipimport !
unsigned int gettst(void)
{
unsigned int ret=0;
if (mouse.exec==-1)
{
do
{
refresh();
ret=gettst2();
} while (ret==0xfffffffe || ret==0xfffffffc);
// ciclo nel caso sia un evento di X11
} else ret=0xfffffffd;
return(ret);
}
/***************************************************************************/
// if ((rr&0xff00)==0) rr+=0x100; // keypad number
unsigned int gettst2(void)
{
unsigned int ret=0;
#ifdef MSDOS
if (config.ansi>0 && config.ansi<128)
{
REGS regs;
regs.h.ah=0x08;
intdos(®s,®s);
ret=regs.h.al;
}
else
{
int rr,s;
_go32_dpmi_registers regs;
regs.h.ah=0x10;
regs.x.ss=regs.x.sp=0;
_go32_dpmi_simulate_int(0x16,®s);
rr=regs.x.ax&0xffff;
if ((rr&0xff)!=0 && (rr&0xff)!=0xe0) rr&=0xff;
s=_farpeekb(vidsel,0x417);
if (s&3 && (rr>255 || rr<32)) rr|=0x10000; // shift
if (s&4 && rr>31) rr|=0x20000; // control
if (s&8) rr|=0x40000; // alt
ret=rr;
}
#elif defined X11
ret=getxkey();
#else
fd_set fds;
timeval tv;
do
{
int fdmax=0;
int i;
FD_ZERO(&fds);
FD_SET(0,&fds);
if (pipes)
{
editor *p;
for (i=0; i<edt.rtot(); i++)
{
p=*(editor **)edt.rdati();
if (p->pipefd) { FD_SET(p->pipefd,&fds); fdmax=fdmax>?p->pipefd; }
edt.next();
}
}
int tvmin=-1;
int sret;
if (config.autosave)
{
int i,t;
editor *myed;
t=edt.rtot(); // numero di editor
edt.nseek(0);
for (i=0; i<t; i++)
{
myed=(*((editor **)edt.rdati()));
if (myed->timeouttosave>0)
{
if (tvmin==-1) tvmin=myed->timeouttosave;
else tvmin=tvmin<?myed->timeouttosave;
}
edt.next();
}
}
if (tvmin>-1)
{
gettimeofday(&tv,(struct timezone *)0);
tv.tv_sec=tvmin-tv.tv_sec+1>?0;
tv.tv_usec=0;
#ifdef __hpux
sret=select(fdmax+1,(int *)&fds,0,0,&tv);
#else
sret=select(fdmax+1,&fds,0,0,&tv);
#endif
}
else
{
#ifdef __hpux
sret=select(fdmax+1,(int *)&fds,0,0,0);
#else
sret=select(fdmax+1,&fds,0,0,0);
#endif
}
if (sret==0)
{
int i,t;
gettimeofday(&tv,(struct timezone *)0);
t=edt.rtot(); // numero di editor
edt.nseek(0);
for (i=0; i<t; i++)
{
editor *myed=(*((editor **)edt.rdati()));
if (myed->timeouttosave>-1 &&
(int)myed->timeouttosave<(int)tv.tv_sec &&
myed->modif())
{
myed->savefile();
for (i=0; i<winn; i++)
{
if (win[i].edtr==myed)
{
win[i].edtr->puthdr(1|2|4);
okstatus(win[i].myda);
i=winn;
}
}
}
edt.next();
}
}
if (pipes)
{
editor *p;
for (i=0; i<edt.rtot(); i++)
{
p=*(editor **)edt.rdati();
if (p->pipefd) if (FD_ISSET(p->pipefd,&fds)) gopipe(p);
edt.next();
}
}
} while (!FD_ISSET(0,&fds));
if (dialof&512) return(0xffffffff);
unsigned char ch;
if (read(0,&ch,1)==-1) return(0xffffffff); else ret=(unsigned char)ch;
#if defined TIOCLINUX // shift status versione LINUX, se definita !
int s=6;
if (config.shiftlinux && ioctl(0,TIOCLINUX,&s)==0)
{
if (s&1 && (ret<32 || ret>126)) ret|=0x100; // shift
if (s&4) ret|=0x200; // control
if (s&10) ret|=0x400; // i due alt
}
#endif
#endif
#ifdef SUPERDEBUG
{
int i;
i=open("/tmp/savekeys",O_CREAT|O_WRONLY|O_APPEND);
if (i>-1)
{
write(i,&ret,2);
close(i);
}
}
#endif
return(ret);
}
/***************************************************************************/
void gettst3(void)
{
#ifdef MSDOS
if (config.ansi>0 && config.ansi<128)
{
REGS regs;
regs.h.ah=0x08;
intdos(®s,®s);
}
else
{
_go32_dpmi_registers regs;
regs.h.ah=0x10;
regs.x.ss=regs.x.sp=0;
_go32_dpmi_simulate_int(0x16,®s);
}
#else
unsigned char ch;
read(0,&ch,1);
#endif
}
/***************************************************************************/
// controllo se c'e' un tasto che aspetta
// 0=nessuno !0=c'e'
int querykey(void)