path: root/mbbsd/io.c

/* $Id: io.c,v 1.17 2002/06/04 13:08:33 in2 Exp $ */
#include "bbs.h"

#if defined(linux)
#define OBUFSIZE  2048
#define IBUFSIZE  128
#else
#define OBUFSIZE  4096
#define IBUFSIZE  256
#endif

static char outbuf[OBUFSIZE], inbuf[IBUFSIZE];
static int obufsize = 0, ibufsize = 0;
static int icurrchar = 0;

/* ----------------------------------------------------- */
/* output routines                                       */
/* ----------------------------------------------------- */

void oflush() {
    if(obufsize) {
    write(1, outbuf, obufsize);
    obufsize = 0;
    }
}

void init_buf()
{

   memset(inbuf,0,IBUFSIZE);
}
void output(char *s, int len) {
    /* Invalid if len >= OBUFSIZE */

    if(obufsize + len > OBUFSIZE) {
    write(1, outbuf, obufsize);
    obufsize = 0;
    }
    memcpy(outbuf + obufsize, s, len);
    obufsize += len;
}

int ochar(int c) {
    if(obufsize > OBUFSIZE - 1) {
    write(1, outbuf, obufsize);
    obufsize = 0;
    }
    outbuf[obufsize++] = c;
    return 0;
}

/* ----------------------------------------------------- */
/* input routines                                        */
/* ----------------------------------------------------- */

static int i_newfd = 0;
static struct timeval i_to, *i_top = NULL;
static int (*flushf) () = NULL;

void add_io(int fd, int timeout) {
    i_newfd = fd;
    if(timeout) {
    i_to.tv_sec = timeout;
    i_to.tv_usec = 16384;  /* Ptt: 改成16384 避免不按時for loop吃cpu time
                  16384 約每秒64次 */
    i_top = &i_to;
    } else
    i_top = NULL;
}

int num_in_buf() {
    return icurrchar - ibufsize;
}

/*
    dogetch() is not reentrant-safe. SIGUSR[12] might happen at any time,
    and dogetch() might be called again, and then ibufsize/icurrchar/inbuf
    might be inconsistent.
    We try to not segfault here... 
*/

static int dogetch() {
    int len;
    static time_t lastact;
    if(ibufsize <= icurrchar) {

    if(flushf)
        (*flushf)();

    refresh();

    if(i_newfd) {
    
        struct timeval timeout;
        fd_set readfds;
            
        if(i_top) timeout=*i_top; /* copy it because select() might change it */
            
        FD_ZERO(&readfds);
        FD_SET(0, &readfds);
        FD_SET(i_newfd, &readfds);

        /* jochang: modify first argument of select from FD_SETSIZE */
        /* since we are only waiting input from fd 0 and i_newfd(>0) */
        
        while((len = select(i_newfd+1, &readfds, NULL, NULL, i_top?&timeout:NULL))<0)
        {
        if(errno != EINTR)
            abort_bbs(0);
            /* raise(SIGHUP); */
        }

        if(len == 0)
        return I_TIMEOUT;

        if(i_newfd && FD_ISSET(i_newfd, &readfds))
        return I_OTHERDATA;
    }


        while((len = read(0, inbuf, IBUFSIZE)) <= 0) {
            if(len == 0 || errno != EINTR)
                abort_bbs(0);
                /* raise(SIGHUP); */
        }              
    ibufsize = len;
    icurrchar = 0;
    }

    if(currutmp) 
      {
        now= time(0);
        if(now-lastact < 3) 
            currutmp->lastact=now;
        lastact=now;
      }
    return inbuf[icurrchar++];
}

static int water_which_flag=0;
int igetch() {
    register int ch;
    while((ch = dogetch())) {
    switch(ch) {
    case Ctrl('L'):
        redoscr();
        continue;
    case Ctrl('U'):
        if(currutmp != NULL &&  currutmp->mode != EDITING
           && currutmp->mode !=  LUSERS && currutmp->mode) {

        screenline_t *screen0 = calloc(t_lines, sizeof(screenline_t));
        int y, x, my_newfd;

        getyx(&y, &x);
        memcpy(screen0, big_picture, t_lines * sizeof(screenline_t));
        my_newfd = i_newfd;
        i_newfd = 0;
        t_users();
        i_newfd = my_newfd;
        memcpy(big_picture, screen0, t_lines * sizeof(screenline_t));
        move(y, x);
        free(screen0);
        redoscr();
        continue;
        } else
        return (ch);
        case KEY_TAB:
        if( WATERMODE(WATER_ORIG) || WATERMODE(WATER_NEW) )
        if( currutmp != NULL && watermode > 0 ){
            watermode = (watermode + water_which->count)
            % water_which->count + 1;
            t_display_new();
            continue;
        }
        return ch;
        break;

        case Ctrl('R'):
        if(currutmp == NULL)
        return (ch);

        if( currutmp->msgs[0].pid && 
        WATERMODE(WATER_OFO) && wmofo == -1 ){
        int y, x, my_newfd;
        screenline_t *screen0 = calloc(t_lines, sizeof(screenline_t));
        memcpy(screen0, big_picture, t_lines * sizeof(screenline_t));
        getyx(&y, &x);      
        my_newfd = i_newfd;
        i_newfd = 0;
        my_write2();
        memcpy(big_picture, screen0, t_lines * sizeof(screenline_t));
        i_newfd = my_newfd;
        move(y, x);
        free(screen0);
        redoscr();
        continue;
        }
       else if(!WATERMODE(WATER_OFO))
            {
        if( watermode > 0 ){
            watermode = (watermode + water_which->count)
            % water_which->count + 1;
            t_display_new();
            continue;
        }
        else if( currutmp->mode == 0 &&
             (currutmp->chatid[0]==2 || currutmp->chatid[0]==3) &&
             water_which->count != 0 && watermode == 0) {
            /* 第二次按 Ctrl-R */
            watermode = 1;
            t_display_new();
            continue;
        }
        else if(watermode==-1 && currutmp->msgs[0].pid) {
            /* 第一次按 Ctrl-R (必須先被丟過水球) */
            screenline_t *screen0;
            int y, x, my_newfd;
            screen0 = calloc(t_lines, sizeof(screenline_t));
            getyx(&y, &x);
            memcpy(screen0, big_picture, t_lines*sizeof(screenline_t));
            
            /* 如果正在talk的話先不處理對方送過來的封包 (不去select) */
            my_newfd = i_newfd;
            i_newfd = 0;
            show_call_in(0, 0);
            watermode = 0;
            my_write(currutmp->msgs[0].pid, "水球丟過去 ： ",
                 currutmp->msgs[0].userid, 0, NULL);
            i_newfd = my_newfd;
        
            /* 還原螢幕 */
            memcpy(big_picture, screen0, t_lines*sizeof(screenline_t));
            move(y, x);
            free(screen0);
            redoscr();
            continue;
        }
             }
        return ch;
        case '\n':   /* Ptt把 \n拿掉 */
        continue;
        case Ctrl('T'):
        if( WATERMODE(WATER_ORIG) || WATERMODE(WATER_NEW) ){
        if(watermode > 0) {
            if(watermode>1)
            watermode--;
            else
            watermode = water_which->count; 
            t_display_new();
            continue;
        }
        }
        return (ch);

        case Ctrl('F'):
        if( WATERMODE(WATER_NEW) ){
        if(watermode >0){
            if( water_which_flag == (int)water_usies )
            water_which_flag = 0;
            else
            water_which_flag =
                           (water_which_flag+1) % (int)(water_usies+1);
            if(water_which_flag==0)
            water_which = &water[0];
            else
            water_which = swater[water_which_flag-1];
            watermode = 1;
            t_display_new();
            continue;
        }
        }
        return ch;

        case Ctrl('G'):
        if( WATERMODE(WATER_NEW) ){
        if( watermode > 0 ){
            water_which_flag=(water_which_flag+water_usies)%(water_usies+1);
            if(water_which_flag==0)
            water_which = &water[0];
            else
            water_which = swater[water_which_flag-1];
            watermode = 1;
            t_display_new();
            continue;
        }
        }
        return ch;

        default:
        return ch;
    }
    }
    return 0;
}

int oldgetdata(int line, int col, char *prompt, char *buf, int len, int echo) {
    register int ch, i;
    int clen;
    int x = col, y = line;
#define MAXLASTCMD 12
    static char lastcmd[MAXLASTCMD][80];

    strip_ansi(buf, buf, STRIP_ALL);

    if(prompt) {

    move(line, col);

    clrtoeol();

    outs(prompt);

    x += strip_ansi(NULL,prompt,0);
    }

    if(!echo) {
    len--;
    clen = 0;
    while((ch = igetch()) != '\r') {
        if(ch == '\177' || ch == Ctrl('H')) {
        if(!clen) {
            bell();
            continue;
        }
        clen--;
        if(echo) {
            ochar(Ctrl('H'));
            ochar(' ');
            ochar(Ctrl('H'));
        }
        continue;
        }
// Ptt
#ifdef BIT8
        if(!isprint2(ch))
#else
        if(!isprint(ch))
#endif
        {
            if(echo)
            bell();
            continue;
        }

        if(clen >= len)  {
        if(echo)
            bell();
        continue;
        }
        buf[clen++] = ch;
        if(echo)
        ochar(ch);
    }
    buf[clen] = '\0';
    outc('\n');
    oflush();
    } else {
    int cmdpos = -1;
    int currchar = 0;

    standout();
    for(clen = len--; clen; clen--)
        outc(' ');
    standend();
    buf[len] = 0;
    move(y, x);
    edit_outs(buf);
    clen = currchar = strlen(buf);

    while(move(y, x + currchar), (ch = igetkey()) != '\r') {
        switch(ch) {
        case KEY_DOWN:
        case Ctrl('N'):
                buf[clen] = '\0';  /* Ptt */
                strncpy(lastcmd[cmdpos], buf, 79);
                cmdpos += MAXLASTCMD - 2;
        case Ctrl('P'):
        case KEY_UP:
                if(ch == KEY_UP || ch == Ctrl('P')) {
            buf[clen] = '\0';  /* Ptt */
            strncpy(lastcmd[cmdpos], buf, 79);
                }
                cmdpos++;
                cmdpos %= MAXLASTCMD;
                strncpy(buf, lastcmd[cmdpos], len);
                buf[len] = 0;

                move(y, x);                   /* clrtoeof */
                for(i = 0; i <= clen; i++)
            outc(' ');
                move(y, x);
                edit_outs(buf);
                clen = currchar = strlen(buf);
                break;
        case KEY_LEFT:
                if(currchar)
            --currchar;
                break;
        case KEY_RIGHT:
                if(buf[currchar])
            ++currchar;
                break;
        case '\177':
        case Ctrl('H'):
                if(currchar) {
            currchar--;
            clen--;
            for(i = currchar; i <= clen; i++)
            buf[i] = buf[i + 1];
            move(y, x + clen);
            outc(' ');
            move(y, x);
            edit_outs(buf);
                }
                break;
        case Ctrl('Y'):
                currchar = 0;
        case Ctrl('K'):
                buf[currchar] = 0;
                move(y, x + currchar);
                for(i = currchar; i < clen; i++)
            outc(' ');
                clen = currchar;
                break;
        case Ctrl('D'):
                if(buf[currchar]) {
            clen--;
            for(i = currchar; i <= clen; i++)
            buf[i] = buf[i + 1];
            move(y, x + clen);
            outc(' ');
            move(y, x);
            edit_outs(buf);
                }
                break;
        case Ctrl('A'):
                currchar = 0;
                break;
        case Ctrl('E'):
                currchar = clen;
                break;
        default:
                if(isprint2(ch) && clen < len && x + clen < scr_cols) {
            for(i = clen + 1; i > currchar;i--)
            buf[i] = buf[i - 1];
            buf[currchar] = ch;
            move(y, x + currchar);
            edit_outs(buf + currchar);
            currchar++;
            clen++;
        }
                break;
        }/* end case */
    }  /* end while */

    if(clen > 1)
        for(cmdpos = MAXLASTCMD - 1; cmdpos; cmdpos--) {
                strcpy(lastcmd[cmdpos], lastcmd[cmdpos - 1]);
                strncpy(lastcmd[0], buf, len);
        }
    if(echo)
        outc('\n');
    refresh();
    }
    if((echo == LCECHO) && ((ch = buf[0]) >= 'A') && (ch <= 'Z'))
    buf[0] = ch | 32;
#ifdef SUPPORT_GB    
    if(echo == DOECHO &&  current_font_type == TYPE_GB)
    {
    strcpy(buf,hc_convert_str(buf, HC_GBtoBIG, HC_DO_SINGLE));
    }
#endif
    return clen;
}

/* Ptt */
int getdata_buf(int line, int col, char *prompt, char *buf, int len, int echo) {
    return oldgetdata(line, col, prompt, buf, len, echo);
}

char
getans(char *prompt)
{
  char ans[5];

  getdata(t_lines-1, 0, prompt, ans, sizeof(ans), LCECHO);
  return ans[0];
}

int getdata_str(int line, int col, char *prompt, char *buf, int len, int echo, char *defaultstr) {
    strncpy(buf, defaultstr, len);
    
    buf[len - 1] = 0;
    return oldgetdata(line, col, prompt, buf, len, echo);
}

int getdata(int line, int col, char *prompt, char *buf, int len, int echo) {
    buf[0] = 0;
    return oldgetdata(line, col, prompt, buf, len, echo);
}

int
rget(int x,char *prompt)
{
  register int ch;

  move(x,0);
  clrtobot(); 
  outs(prompt);
  refresh();

  ch = igetch();
  if( ch >= 'A' && ch <= 'Z') ch |= 32;

   return ch;
}


int igetkey() {
    int mode;
    int ch, last;

    mode = last = 0;
    while(1) {
    ch = igetch();
    if(mode == 0) {
        if(ch == KEY_ESC)
        mode = 1;
        else
        return ch;              /* Normal Key */
    } else if (mode == 1) {         /* Escape sequence */
        if(ch == '[' || ch == 'O')
        mode = 2;
        else if(ch == '1' || ch == '4')
        mode = 3;
        else {
        KEY_ESC_arg = ch;
        return KEY_ESC;
        }
    } else if(mode == 2) {          /* Cursor key */
        if(ch >= 'A' && ch <= 'D')
        return KEY_UP + (ch - 'A');
        else if(ch >= '1' && ch <= '6')
        mode = 3;
        else
        return ch;
    } else if (mode == 3) {         /* Ins Del Home End PgUp PgDn */
        if(ch == '~')
        return KEY_HOME + (last - '1');
        else
        return ch;
    }
    last = ch;
    }
}