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0ec0cc67 | 1 | static char *sccsid = "@(#)worm.c 4.3 (Berkeley) %G%"; |
c4e6edfa KM |
2 | |
3 | /* | |
4 | * Worm. Written by Michael Toy | |
5 | * UCSC | |
6 | */ | |
7 | ||
8 | #include <ctype.h> | |
9 | #include <curses.h> | |
10 | #include <signal.h> | |
11 | ||
12 | #define newlink() (struct body *) malloc(sizeof (struct body)); | |
13 | #define HEAD '@' | |
14 | #define BODY 'o' | |
15 | #define LENGTH 7 | |
16 | #define RUNLEN 8 | |
17 | #define when break;case | |
18 | #define otherwise break;default | |
19 | #define CNTRL(p) ('p'-'A'+1) | |
73ead3d6 KA |
20 | #ifndef attron |
21 | # define baudrate() _tty.sg_ospeed | |
22 | #endif | |
c4e6edfa KM |
23 | |
24 | WINDOW *tv; | |
25 | WINDOW *stw; | |
26 | struct body { | |
27 | int x; | |
28 | int y; | |
29 | struct body *prev; | |
30 | struct body *next; | |
31 | } *head, *tail, goody; | |
32 | int growing = 0; | |
33 | int running = 0; | |
73ead3d6 | 34 | int slow = 0; |
c4e6edfa KM |
35 | int score = 0; |
36 | int start_len = LENGTH; | |
37 | char lastch; | |
38 | char outbuf[BUFSIZ]; | |
39 | ||
40 | main(argc, argv) | |
41 | char **argv; | |
42 | { | |
43 | int leave(), wake(), suspend(); | |
44 | char ch; | |
45 | ||
46 | if (argc == 2) | |
47 | start_len = atoi(argv[1]); | |
48 | if ((start_len <= 0) || (start_len > 500)) | |
49 | start_len = LENGTH; | |
50 | setbuf(stdout, outbuf); | |
51 | srand(getpid()); | |
52 | signal(SIGALRM, wake); | |
53 | signal(SIGINT, leave); | |
54 | signal(SIGQUIT, leave); | |
55 | #ifdef SIGTSTP | |
56 | signal(SIGTSTP, suspend); /* process control signal */ | |
57 | #endif | |
58 | initscr(); | |
59 | crmode(); | |
60 | noecho(); | |
73ead3d6 | 61 | slow = (baudrate() <= B1200); |
c4e6edfa KM |
62 | clear(); |
63 | stw = newwin(1, COLS-1, 0, 0); | |
64 | tv = newwin(LINES-1, COLS-1, 1, 0); | |
65 | box(tv, '*', '*'); | |
66 | scrollok(tv, FALSE); | |
67 | scrollok(stw, FALSE); | |
68 | wmove(stw, 0, 0); | |
69 | wprintw(stw, " Worm"); | |
70 | refresh(); | |
71 | wrefresh(stw); | |
72 | wrefresh(tv); | |
73 | life(); /* Create the worm */ | |
74 | prize(); /* Put up a goal */ | |
75 | while(1) | |
76 | { | |
77 | if (running) | |
78 | { | |
79 | running--; | |
80 | process(lastch); | |
81 | } | |
82 | else | |
83 | { | |
84 | fflush(stdout); | |
85 | if (read(0, &ch, 1) >= 0) | |
86 | process(ch); | |
87 | } | |
88 | } | |
89 | } | |
90 | ||
91 | life() | |
92 | { | |
93 | register struct body *bp, *np; | |
94 | register int i; | |
95 | ||
96 | head = newlink(); | |
97 | head->x = start_len+2; | |
98 | head->y = 12; | |
99 | head->next = NULL; | |
100 | display(head, HEAD); | |
101 | for (i = 0, bp = head; i < start_len; i++, bp = np) { | |
102 | np = newlink(); | |
103 | np->next = bp; | |
104 | bp->prev = np; | |
105 | np->x = bp->x - 1; | |
106 | np->y = bp->y; | |
107 | display(np, BODY); | |
108 | } | |
109 | tail = np; | |
110 | tail->prev = NULL; | |
c4e6edfa KM |
111 | } |
112 | ||
113 | display(pos, chr) | |
114 | struct body *pos; | |
115 | char chr; | |
116 | { | |
117 | wmove(tv, pos->y, pos->x); | |
118 | waddch(tv, chr); | |
119 | } | |
120 | ||
121 | leave() | |
122 | { | |
123 | endwin(); | |
124 | exit(0); | |
125 | } | |
126 | ||
127 | wake() | |
128 | { | |
129 | signal(SIGALRM, wake); | |
130 | fflush(stdout); | |
131 | process(lastch); | |
132 | } | |
133 | ||
134 | rnd(range) | |
135 | { | |
136 | return abs((rand()>>5)+(rand()>>5)) % range; | |
137 | } | |
138 | ||
139 | newpos(bp) | |
140 | struct body * bp; | |
141 | { | |
142 | do { | |
143 | bp->y = rnd(LINES-3)+ 2; | |
144 | bp->x = rnd(COLS-3) + 1; | |
145 | wmove(tv, bp->y, bp->x); | |
146 | } while(winch(tv) != ' '); | |
147 | } | |
148 | ||
149 | prize() | |
150 | { | |
151 | int value; | |
152 | ||
153 | value = rnd(9) + 1; | |
154 | newpos(&goody); | |
155 | waddch(tv, value+'0'); | |
156 | wrefresh(tv); | |
157 | } | |
158 | ||
159 | process(ch) | |
160 | char ch; | |
161 | { | |
162 | register int x,y; | |
163 | struct body *nh; | |
164 | ||
165 | alarm(0); | |
166 | x = head->x; | |
167 | y = head->y; | |
168 | switch(ch) | |
169 | { | |
170 | when 'h': x--; | |
171 | when 'j': y++; | |
172 | when 'k': y--; | |
173 | when 'l': x++; | |
174 | when 'H': x--; running = RUNLEN; ch = tolower(ch); | |
175 | when 'J': y++; running = RUNLEN/2; ch = tolower(ch); | |
176 | when 'K': y--; running = RUNLEN/2; ch = tolower(ch); | |
177 | when 'L': x++; running = RUNLEN; ch = tolower(ch); | |
178 | when '\f': setup(); return; | |
179 | when CNTRL(Z): suspend(); return; | |
180 | when CNTRL(C): crash(); return; | |
181 | when CNTRL(D): crash(); return; | |
182 | otherwise: if (! running) alarm(1); | |
183 | return; | |
184 | } | |
185 | lastch = ch; | |
186 | if (growing == 0) | |
187 | { | |
188 | display(tail, ' '); | |
189 | tail->next->prev = NULL; | |
190 | nh = tail->next; | |
191 | free(tail); | |
192 | tail = nh; | |
193 | } | |
194 | else growing--; | |
195 | display(head, BODY); | |
196 | wmove(tv, y, x); | |
197 | if (isdigit(ch = winch(tv))) | |
198 | { | |
199 | growing += ch-'0'; | |
200 | prize(); | |
201 | score += growing; | |
202 | running = 0; | |
203 | wmove(stw, 0, 68); | |
204 | wprintw(stw, "Score: %3d", score); | |
205 | wrefresh(stw); | |
206 | } | |
207 | else if(ch != ' ') crash(); | |
208 | nh = newlink(); | |
209 | nh->next = NULL; | |
210 | nh->prev = head; | |
211 | head->next = nh; | |
212 | nh->y = y; | |
213 | nh->x = x; | |
214 | display(nh, HEAD); | |
215 | head = nh; | |
73ead3d6 KA |
216 | if (!(slow && running)) |
217 | wrefresh(tv); | |
218 | if (!running) | |
219 | alarm(1); | |
c4e6edfa KM |
220 | } |
221 | ||
222 | crash() | |
223 | { | |
224 | sleep(2); | |
225 | clear(); | |
226 | move(23, 0); | |
227 | refresh(); | |
228 | printf("Well you ran into something and the game is over.\n"); | |
229 | printf("Your final score was %d\n", score); | |
230 | leave(); | |
231 | } | |
232 | ||
233 | suspend() | |
234 | { | |
235 | char *sh; | |
236 | ||
237 | move(LINES-1, 0); | |
238 | refresh(); | |
239 | endwin(); | |
240 | fflush(stdout); | |
241 | #ifdef SIGTSTP | |
242 | kill(getpid(), SIGTSTP); | |
243 | signal(SIGTSTP, suspend); | |
244 | #else | |
245 | sh = getenv("SHELL"); | |
246 | if (sh == NULL) | |
247 | sh = "/bin/sh"; | |
248 | system(sh); | |
249 | #endif | |
250 | crmode(); | |
251 | noecho(); | |
252 | setup(); | |
253 | } | |
254 | ||
255 | setup() | |
256 | { | |
257 | clear(); | |
258 | refresh(); | |
259 | touchwin(stw); | |
260 | wrefresh(stw); | |
261 | touchwin(tv); | |
262 | wrefresh(tv); | |
263 | alarm(1); | |
264 | } |