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/*========================================
 *    sl.c: SL version 5.03
 *        Copyright 1993,1998,2014-2015
 *                  Toyoda Masashi
 *                  (mtoyoda@acm.org)
 *        Last Modified: 2014/06/03
 *========================================
 */
/* sl version 5.03 : Fix some more compiler warnings.                        */
/*                                              by Ryan Jacobs    2015/01/19 */
/* sl version 5.02 : Fix compiler warnings.                                  */
/*                                              by Jeff Schwab    2014/06/03 */
/* sl version 5.01 : removed cursor and handling of IO                       */
/*                                              by Chris Seymour  2014/01/03 */
/* sl version 5.00 : add -c option                                           */
/*                                              by Toyoda Masashi 2013/05/05 */
/* sl version 4.00 : add C51, usleep(40000)                                  */
/*                                              by Toyoda Masashi 2002/12/31 */
/* sl version 3.03 : add usleep(20000)                                       */
/*                                              by Toyoda Masashi 1998/07/22 */
/* sl version 3.02 : D51 flies! Change options.                              */
/*                                              by Toyoda Masashi 1993/01/19 */
/* sl version 3.01 : Wheel turns smoother                                    */
/*                                              by Toyoda Masashi 1992/12/25 */
/* sl version 3.00 : Add d(D51) option                                       */
/*                                              by Toyoda Masashi 1992/12/24 */
/* sl version 2.02 : Bug fixed.(dust remains in screen)                      */
/*                                              by Toyoda Masashi 1992/12/17 */
/* sl version 2.01 : Smoke run and disappear.                                */
/*                   Change '-a' to accident option.                         */
/*                                              by Toyoda Masashi 1992/12/16 */
/* sl version 2.00 : Add a(all),l(long),F(Fly!) options.                     */
/*                                              by Toyoda Masashi 1992/12/15 */
/* sl version 1.02 : Add turning wheel.                                      */
/*                                              by Toyoda Masashi 1992/12/14 */
/* sl version 1.01 : Add more complex smoke.                                 */
/*                                              by Toyoda Masashi 1992/12/14 */
/* sl version 1.00 : SL runs vomiting out smoke.                             */
/*                                              by Toyoda Masashi 1992/12/11 */

#include "curses.h"
#include <signal.h>
#include <unistd.h>
#include <time.h>
#include <sys/time.h>
#include "sl.h"

void add_smoke(int y, int x);
void add_man(int y, int x);
int add_C51(int x);
int add_D51(int x);
int add_sl(int x);
void option(char *str);
int my_mvaddstr(int y, int x, char *str);

int ACCIDENT  = 0;
int LOGO      = 0;
int FLY       = 0;
int C51       = 0;
int SLOW      = 0;
int FAST      = 0;

int my_mvaddstr(int y, int x, char *str)
{
    int startx;

    for ( ; x < 0; ++x, ++str)
        if (*str == '\0')  return ERR;
    startx = x;
    for ( ; *str != '\0'; ++str, ++x) {
        if (x >= COLS) break;
        if (!SLOW && x > startx && x < COLS)
            addch(*str);
        else mvaddch(y, x, *str);
    }
    return OK;
}

void option(char *str)
{
    extern int ACCIDENT, LOGO, FLY, C51;

    while (*str != '\0') {
        switch (*str++) {
            case 'a': ACCIDENT = 1; break;
            case 'F': FLY      = 1; break;
            case 'l': LOGO     = 1; break;
            case 'c': C51      = 1; break;
            case 's': SLOW     = 1; break;
            case 'f': FAST     = 1; break;
            default:                break;
        }
    }
}

void cycle(unsigned long usecs)
{
    unsigned long elapsed;
    struct timeval now;
    static long start;

    if (usecs == 0) {
        gettimeofday(&now, NULL);
        start = now.tv_sec * 1000000L + now.tv_usec;
        return;
    }
    gettimeofday(&now, NULL);
    elapsed = now.tv_sec * 1000000L + now.tv_usec - start;
    if (elapsed < usecs)
        usleep(usecs - elapsed);
}

int main(int argc, char *argv[])
{
    int x, i;

    for (i = 1; i < argc; ++i) {
        if (*argv[i] == '-') {
            option(argv[i] + 1);
        }
    }
    initscr();
    signal(SIGINT, SIG_IGN);
    noecho();
    curs_set(0);
    nodelay(stdscr, TRUE);
    leaveok(stdscr, TRUE);
    scrollok(stdscr, FALSE);

    for (x = COLS - 1; ; --x) {
        if (!FAST && !SLOW) {
            cycle(0);
        }
        if (LOGO == 1) {
            if (add_sl(x) == ERR) break;
        }
        else if (C51 == 1) {
            if (add_C51(x) == ERR) break;
        }
        else {
            if (add_D51(x) == ERR) break;
        }
        refresh();
        if (!FAST && !SLOW) {
            cycle(40000);
        }
    }
    mvcur(0, COLS - 1, LINES - 2, 0);
    endwin();

    return 0;
}


int add_sl(int x)
{
    static char *sl[LOGOPATTERNS][LOGOHEIGHT + 1]
        = {{LOGO1, LOGO2, LOGO3, LOGO4, LWHL11, LWHL12, DELLN},
           {LOGO1, LOGO2, LOGO3, LOGO4, LWHL21, LWHL22, DELLN},
           {LOGO1, LOGO2, LOGO3, LOGO4, LWHL31, LWHL32, DELLN},
           {LOGO1, LOGO2, LOGO3, LOGO4, LWHL41, LWHL42, DELLN},
           {LOGO1, LOGO2, LOGO3, LOGO4, LWHL51, LWHL52, DELLN},
           {LOGO1, LOGO2, LOGO3, LOGO4, LWHL61, LWHL62, DELLN}};

    static char *coal[LOGOHEIGHT + 1]
        = {LCOAL1, LCOAL2, LCOAL3, LCOAL4, LCOAL5, LCOAL6, DELLN};

    static char *car[LOGOHEIGHT + 1]
        = {LCAR1, LCAR2, LCAR3, LCAR4, LCAR5, LCAR6, DELLN};

    int i, y, py1 = 0, py2 = 0, py3 = 0;

    if (x < - LOGOLENGTH)  return ERR;
    y = LINES / 2 - 3;

    if (FLY == 1) {
        y = (x / 6) + LINES - (COLS / 6) - LOGOHEIGHT;
        py1 = 2;  py2 = 4;  py3 = 6;
    }
    for (i = 0; i <= LOGOHEIGHT; ++i) {
        my_mvaddstr(y + i, x, sl[(LOGOLENGTH + x) / 3 % LOGOPATTERNS][i]);
        my_mvaddstr(y + i + py1, x + 21, coal[i]);
        my_mvaddstr(y + i + py2, x + 42, car[i]);
        my_mvaddstr(y + i + py3, x + 63, car[i]);
    }
    if (ACCIDENT == 1) {
        add_man(y + 1, x + 14);
        add_man(y + 1 + py2, x + 45);  add_man(y + 1 + py2, x + 53);
        add_man(y + 1 + py3, x + 66);  add_man(y + 1 + py3, x + 74);
    }
    add_smoke(y - 1, x + LOGOFUNNEL);
    return OK;
}


int add_D51(int x)
{
    static char *d51[D51PATTERNS][D51HEIGHT + 1]
        = {{D51STR1, D51STR2, D51STR3, D51STR4, D51STR5, D51STR6, D51STR7,
            D51WHL11, D51WHL12, D51WHL13, D51DEL},
           {D51STR1, D51STR2, D51STR3, D51STR4, D51STR5, D51STR6, D51STR7,
            D51WHL21, D51WHL22, D51WHL23, D51DEL},
           {D51STR1, D51STR2, D51STR3, D51STR4, D51STR5, D51STR6, D51STR7,
            D51WHL31, D51WHL32, D51WHL33, D51DEL},
           {D51STR1, D51STR2, D51STR3, D51STR4, D51STR5, D51STR6, D51STR7,
            D51WHL41, D51WHL42, D51WHL43, D51DEL},
           {D51STR1, D51STR2, D51STR3, D51STR4, D51STR5, D51STR6, D51STR7,
            D51WHL51, D51WHL52, D51WHL53, D51DEL},
           {D51STR1, D51STR2, D51STR3, D51STR4, D51STR5, D51STR6, D51STR7,
            D51WHL61, D51WHL62, D51WHL63, D51DEL}};
    static char *coal[D51HEIGHT + 1]
        = {COAL01, COAL02, COAL03, COAL04, COAL05,
           COAL06, COAL07, COAL08, COAL09, COAL10, COALDEL};

    int y, i, dy = 0;

    if (x < - D51LENGTH)  return ERR;
    y = LINES / 2 - 5;

    if (FLY == 1) {
        y = (x / 7) + LINES - (COLS / 7) - D51HEIGHT;
        dy = 1;
    }
    for (i = 0; i <= D51HEIGHT; ++i) {
        my_mvaddstr(y + i, x, d51[(D51LENGTH + x) % D51PATTERNS][i]);
        my_mvaddstr(y + i + dy, x + 53, coal[i]);
    }
    if (ACCIDENT == 1) {
        add_man(y + 2, x + 43);
        add_man(y + 2, x + 47);
    }
    add_smoke(y - 1, x + D51FUNNEL);
    return OK;
}

int add_C51(int x)
{
    static char *c51[C51PATTERNS][C51HEIGHT + 1]
        = {{C51STR1, C51STR2, C51STR3, C51STR4, C51STR5, C51STR6, C51STR7,
            C51WH11, C51WH12, C51WH13, C51WH14, C51DEL},
           {C51STR1, C51STR2, C51STR3, C51STR4, C51STR5, C51STR6, C51STR7,
            C51WH21, C51WH22, C51WH23, C51WH24, C51DEL},
           {C51STR1, C51STR2, C51STR3, C51STR4, C51STR5, C51STR6, C51STR7,
            C51WH31, C51WH32, C51WH33, C51WH34, C51DEL},
           {C51STR1, C51STR2, C51STR3, C51STR4, C51STR5, C51STR6, C51STR7,
            C51WH41, C51WH42, C51WH43, C51WH44, C51DEL},
           {C51STR1, C51STR2, C51STR3, C51STR4, C51STR5, C51STR6, C51STR7,
            C51WH51, C51WH52, C51WH53, C51WH54, C51DEL},
           {C51STR1, C51STR2, C51STR3, C51STR4, C51STR5, C51STR6, C51STR7,
            C51WH61, C51WH62, C51WH63, C51WH64, C51DEL}};
    static char *coal[C51HEIGHT + 1]
        = {COALDEL, COAL01, COAL02, COAL03, COAL04, COAL05,
           COAL06, COAL07, COAL08, COAL09, COAL10, COALDEL};

    int y, i, dy = 0;

    if (x < - C51LENGTH)  return ERR;
    y = LINES / 2 - 5;

    if (FLY == 1) {
        y = (x / 7) + LINES - (COLS / 7) - C51HEIGHT;
        dy = 1;
    }
    for (i = 0; i <= C51HEIGHT; ++i) {
        my_mvaddstr(y + i, x, c51[(C51LENGTH + x) % C51PATTERNS][i]);
        my_mvaddstr(y + i + dy, x + 55, coal[i]);
    }
    if (ACCIDENT == 1) {
        add_man(y + 3, x + 45);
        add_man(y + 3, x + 49);
    }
    add_smoke(y - 1, x + C51FUNNEL);
    return OK;
}


void add_man(int y, int x)
{
    static char *man[2][2] = {{"", "(O)"}, {"Help!", "\\O/"}};
    int i;

    for (i = 0; i < 2; ++i) {
        my_mvaddstr(y + i, x, man[(LOGOLENGTH + x) / 12 % 2][i]);
    }
}


void add_smoke(int y, int x)
#define SMOKEPTNS        16
{
    static struct smokes {
        int y, x;
        int ptrn, kind;
    } S[1000];
    static int sum = 0;
    static char *Smoke[2][SMOKEPTNS]
        = {{"(   )", "(    )", "(    )", "(   )", "(  )",
            "(  )" , "( )"   , "( )"   , "()"   , "()"  ,
            "O"    , "O"     , "O"     , "O"    , "O"   ,
            " "                                          },
           {"(@@@)", "(@@@@)", "(@@@@)", "(@@@)", "(@@)",
            "(@@)" , "(@)"   , "(@)"   , "@@"   , "@@"  ,
            "@"    , "@"     , "@"     , "@"    , "@"   ,
            " "                                          }};
    static char *Eraser[SMOKEPTNS]
        =  {"     ", "      ", "      ", "     ", "    ",
            "    " , "   "   , "   "   , "  "   , "  "  ,
            " "    , " "     , " "     , " "    , " "   ,
            " "                                          };
    static int dy[SMOKEPTNS] = { 2,  1, 1, 1, 0, 0, 0, 0, 0, 0,
                                 0,  0, 0, 0, 0, 0             };
    static int dx[SMOKEPTNS] = {-2, -1, 0, 1, 1, 1, 1, 1, 2, 2,
                                 2,  2, 2, 3, 3, 3             };
    int i;

    if (x % 4 == 0) {
        for (i = 0; i < sum; ++i) {
            my_mvaddstr(S[i].y, S[i].x, Eraser[S[i].ptrn]);
            S[i].y    -= dy[S[i].ptrn];
            S[i].x    += dx[S[i].ptrn];
            S[i].ptrn += (S[i].ptrn < SMOKEPTNS - 1) ? 1 : 0;
            my_mvaddstr(S[i].y, S[i].x, Smoke[S[i].kind][S[i].ptrn]);
        }
        my_mvaddstr(y, x, Smoke[sum % 2][0]);
        S[sum].y = y;    S[sum].x = x;
        S[sum].ptrn = 0; S[sum].kind = sum % 2;
        sum ++;
    }
}
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