path: root/mbbsd/io.c

/* $Id$ */
#include "bbs.h"

#define OBUFSIZE  2048
#define IBUFSIZE  128

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

/* ----------------------------------------------------- */
/* convert routines                                      */
/* ----------------------------------------------------- */
#ifdef CONVERT

read_write_type write_type = (read_write_type)write;
read_write_type read_type = read;

inline static int read_wrapper(int fd, void *buf, size_t count) {
    return (*read_type)(fd, buf, count);
}

inline static int write_wrapper(int fd, void *buf, size_t count) {
    return (*write_type)(fd, buf, count);
}
#endif

/* ----------------------------------------------------- */
/* output routines                                       */
/* ----------------------------------------------------- */
void
oflush(void)
{
    if (obufsize) {
#ifdef CONVERT
    write_wrapper(1, outbuf, obufsize);
#else
    write(1, outbuf, obufsize);
#endif
    obufsize = 0;
    }
}

void
init_buf(void)
{

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

    assert(len<OBUFSIZE);
    if (obufsize + len > OBUFSIZE) {
#ifdef CONVERT
    write_wrapper(1, outbuf, obufsize);
#else
    write(1, outbuf, obufsize);
#endif
    obufsize = 0;
    }
    memcpy(outbuf + obufsize, s, len);
    obufsize += len;
}

int
ochar(int c)
{
    if (obufsize > OBUFSIZE - 1) {
    /* suppose one byte data doesn't need to be converted. */
    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(void)
{
    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(void)
{
    int             len;
    static time4_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){
#ifdef OUTTA_TIMER
        now = SHM->GV2.e.now;
#else
        now = time(0);
#endif
        return I_TIMEOUT;
        }

        if (i_newfd && FD_ISSET(i_newfd, &readfds)){
#ifdef OUTTA_TIMER
        now = SHM->GV2.e.now;
#else
        now = time(0);
#endif
        return I_OTHERDATA;
        }
    }
#ifdef NOKILLWATERBALL
    if( currutmp && currutmp->msgcount && !reentrant_write_request )
    write_request(1);
#endif

#ifdef SKIP_TELNET_CONTROL_SIGNAL
    do{
#endif

#ifdef CONVERT
        while ((len = read_wrapper(0, inbuf, IBUFSIZE)) <= 0) {
#else
        while ((len = read(0, inbuf, IBUFSIZE)) <= 0) {
#endif
        if (len == 0 || errno != EINTR)
            abort_bbs(0);
        /* raise(SIGHUP); */
 
        }
#ifdef SKIP_TELNET_CONTROL_SIGNAL
    } while( inbuf[0] == -1 );
#endif
    ibufsize = len;
    icurrchar = 0;
    }
    if (currutmp) {
#ifdef OUTTA_TIMER
    now = SHM->GV2.e.now;
#else
    now = time(0);
#endif
    /* 3 秒內超過兩 byte 才算 active, anti-antiidle.
     * 不過方向鍵等組合鍵不止 1 byte */
    if (now - lastact < 3)
        currutmp->lastact = now;
    lastact = now;
    }
    return inbuf[icurrchar++];
}

static int      water_which_flag = 0;
int
igetch(void)
{
   register int ch, mode = 0, last = 0;
   while ((ch = dogetch())) {
        if (mode == 0 && ch == KEY_ESC)           // here is state machine for 2 bytes key
                mode = 1;
        else if (mode == 1) { /* Escape sequence */
            if (ch == '[' || ch == 'O')
                mode = 2;
            else if (ch == '1' || ch == '4')
               { mode = 3; last = ch; }
            else 
               {
                KEY_ESC_arg = ch;
                return KEY_ESC;
               }
        } else if (mode == 2 && ch >= 'A' && ch <= 'D')  /* Cursor key */
               return  KEY_UP + (ch - 'A');
         else  if (mode == 2 && ch >= '1' && ch <= '6')
               { mode = 3; last = ch; }
         else if (mode == 3 && ch == '~') { /* Ins Del Home End PgUp PgDn */
                return KEY_HOME + (last - '1');
        }
        else                                       //  here is switch for default keys
    switch (ch) {
        case IAC:
            continue;
#ifdef DEBUG
    case Ctrl('Q'):{
        struct rusage ru;
        getrusage(RUSAGE_SELF, &ru);
        vmsg("sbrk: %d KB, idrss: %d KB, isrss: %d KB",
         ((int)sbrk(0) - 0x8048000) / 1024,
         (int)ru.ru_idrss, (int)ru.ru_isrss);
    }
        continue;
#endif
    case Ctrl('L'):
        redoscr();
        continue;
    case Ctrl('U'):
        if (currutmp != NULL && currutmp->mode != EDITING
        && currutmp->mode != LUSERS && currutmp->mode) {

        void *screen0;
        int     oldroll = roll;
        int             y, x, my_newfd;

        getyx(&y, &x);
        screen0=malloc(screen_backupsize(t_lines, big_picture));
        screen_backup(t_lines, big_picture, screen0);
        my_newfd = i_newfd;
        i_newfd = 0;

        t_users();

        i_newfd = my_newfd;
        screen_restore(t_lines, big_picture, screen0);
        free(screen0);
        roll = oldroll;
        move(y, x);
        redoscr();
        continue;
        } 
            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;

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

        if (currutmp->msgs[0].pid &&
        WATERMODE(WATER_OFO) && wmofo == NOTREPLYING) {
        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) */
            void *screen0;
            int             y, x, my_newfd;
            getyx(&y, &x);
            screen0=malloc(screen_backupsize(t_lines, big_picture));
            screen_backup(t_lines, big_picture, screen0);

            /* 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;
#ifndef PLAY_ANGEL
            my_write(currutmp->msgs[0].pid, "水球丟過去： ",
                currutmp->msgs[0].userid, WATERBALL_GENERAL, NULL);
#else
            switch (currutmp->msgs[0].msgmode) {
            case MSGMODE_TALK:
            case MSGMODE_WRITE:
                my_write(currutmp->msgs[0].pid, "水球丟過去： ",
                    currutmp->msgs[0].userid, WATERBALL_GENERAL, NULL);
                break;
            case MSGMODE_FROMANGEL:
                my_write(currutmp->msgs[0].pid, "再問他一次： ",
                    currutmp->msgs[0].userid, WATERBALL_ANGEL, NULL);
                break;
            case MSGMODE_TOANGEL:
                my_write(currutmp->msgs[0].pid, "回答小主人： ",
                    currutmp->msgs[0].userid, WATERBALL_ANSWER, NULL);
                break;
            }
#endif
            i_newfd = my_newfd;

            /* 還原螢幕 */
            screen_restore(t_lines, big_picture, screen0);
            free(screen0);
            move(y, x);
            redoscr();
            continue;
        }
        }
        return ch;

    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;

    case Ctrl('J'):  /* Ptt 把 \n 拿掉 */
#ifdef PLAY_ANGEL
        /* Seams some telnet client still send CR LF when changing lines.
        CallAngel();
        */
#endif
        continue;

    default:
            return ch;
    }
    }
    return 0;
}

/**
 * 根據 mode 來 strip 字串 str，並把結果存到 buf
 * @param buf
 * @param str
 * @param mode enum {STRIP_ALL = 0, ONLY_COLOR, NO_RELOAD};
 *             STRIP_ALL: ??
 *             ONLY_COLOR: ??
 *             NO_RELOAD: 不 strip (?)
 */
int
strip_ansi(char *buf, const char *str, int mode)
{
    register int    count = 0;
    static const char EscapeFlag[] = {
    /*  0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* 10 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 ,0, 0, 0, 0, 0,
    /* 20 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* 30 */ 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 0, 0, /* 0~9 ;= */
    /* 40 */ 0, 2, 2, 2, 2, 0, 0, 0, 2, 2, 2, 2, 0, 0, 0, 0, /* ABCDHIJK */
    /* 50 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* 60 */ 0, 0, 0, 0, 0, 0, 2, 0, 2, 0, 0, 0, 2, 2, 0, 0, /* fhlm */
    /* 70 */ 0, 0, 0, 2, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* su */
    /* 80 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* 90 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* A0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* B0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* C0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* D0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* E0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    /* F0 */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
    };
#define isEscapeParam(X) (EscapeFlag[(int)(X)] & 1)
#define isEscapeCommand(X) (EscapeFlag[(int)(X)] & 2)

    for(; *str; ++str)
    if( *str != '\033' ){
        if( buf )
        *buf++ = *str;
        ++count;
    }else{
        const char* p = str + 1;
        if( *p != '[' ){
        ++str;
        continue;
        }
        while(isEscapeParam(*++p));
        if( (mode == NO_RELOAD && isEscapeCommand(*p)) ||
        (mode == ONLY_COLOR && *p == 'm' )){
        register int len = p - str + 1;
        if( buf ){
            strncpy(buf, str, len);
            buf += len;
        }
        count += len;
        }
        str = p;
    }
    if( buf )
    *buf = 0;
    return count;
}

void
strip_nonebig5(unsigned char *str, int maxlen)
{
  int i;
  int len=0;
  for(i=0;i<maxlen && str[i];i++) {
    if(32<=str[i] && str[i]<128)
      str[len++]=str[i];
    else if(str[i]==255) {
      if(i+1<maxlen)
    if(251<=str[i+1] && str[i+1]<=254) {
      i++;
      if(i+1<maxlen && str[i+1])
        i++;
    }
      continue;
    } else if(str[i]&0x80) {
      if(i+1<maxlen)
    if((0x40<=str[i+1] && str[i+1]<=0x7e) ||
       (0xa1<=str[i+1] && str[i+1]<=0xfe)) {
      str[len++]=str[i];
      str[len++]=str[i+1];
      i++;
    }
    }
  }
  if(len<maxlen)
    str[len]='\0';
}

int
oldgetdata(int line, int col, const 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, STRIP_ALL);
    }

    if (!echo) {
    len--;
    clen = 0;
    while ((ch = igetch()) != '\r') {
        if (ch == '\177' || ch == Ctrl('H')) {
        if (!clen) {
            bell();
            continue;
        }
        clen--;
        continue;
        }
        if (!isprint(ch)) {
        continue;
        }
        if (clen >= len) {
        continue;
        }
        buf[clen++] = ch;
    }
    buf[clen] = '\0';
    outc('\n');
    oflush();
    } else {
    int             cmdpos = 0;
    int             currchar = 0;

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

    while (move(y, x + currchar), (ch = igetch()) != '\r') {
        switch (ch) {
        case KEY_DOWN: case Ctrl('N'):
        case KEY_UP:   case Ctrl('P'):
        strlcpy(lastcmd[cmdpos], buf, sizeof(lastcmd[0]));
        if (ch == KEY_UP || ch == Ctrl('P'))
            cmdpos++;
        else
            cmdpos += MAXLASTCMD - 1;
        cmdpos %= MAXLASTCMD;
        strlcpy(buf, lastcmd[cmdpos], len+1);

        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'):
        case KEY_DEL:
        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'):
        case KEY_HOME:
        currchar = 0;
        break;
        case Ctrl('E'):
        case KEY_END:
        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) {
        strlcpy(lastcmd[0], buf, sizeof(lastcmd[0]));
        memmove(lastcmd+1, lastcmd, (MAXLASTCMD-1)*sizeof(lastcmd[0]));
    }
    outc('\n');
    refresh();
    }
    if ((echo == LCECHO) && isupper((int)buf[0]))
    buf[0] = tolower(buf[0]);
    return clen;
}

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


int
getdata_str(int line, int col, const char *prompt, char *buf, int len, int echo, const char *defaultstr)
{
    strlcpy(buf, defaultstr, len);

    return oldgetdata(line, col, prompt, buf, len, echo);
}

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