2 * Empire - A multi-player, client/server Internet based war game.
3 * Copyright (C) 1986-2011, Dave Pare, Jeff Bailey, Thomas Ruschak,
4 * Ken Stevens, Steve McClure, Markus Armbruster
6 * Empire is free software: you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation, either version 3 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program. If not, see <http://www.gnu.org/licenses/>.
21 * See files README, COPYING and CREDITS in the root of the source
22 * tree for related information and legal notices. It is expected
23 * that future projects/authors will amend these files as needed.
27 * pr.c: Output to players
29 * Known contributors to this file:
30 * Dave Pare, 1986, 1989
31 * Steve McClure, 1998-2000
32 * Ron Koenderink, 2005
33 * Markus Armbruster, 2005-2009
37 * Player output is fully buffered. It can block only if the
38 * receiving player is the current player and his last command doesn't
39 * have the C_MOD flag. Output to another player must not block
40 * because that player could be gone when the printing thread wakes
41 * up, and the code isn't prepared for that. Output within C_MOD
42 * command never blocks, so that such commands can print freely
43 * without yielding the processor.
45 * Each line of output starts with an identification character
46 * encoding the output id, followed by space. Ids less than 10 are
47 * encoded as decimal digits, and larger ids as lower case letters,
48 * starting with 'a'. Symbolic names for ids are defined in proto.h.
62 #include "prototypes.h"
67 static void pr_player(struct player *pl, int id, char *buf);
68 static void upr_player(struct player *pl, int id, char *buf);
69 static void outid(struct player *pl, int n);
72 * Print to current player similar to printf().
73 * Use printf-style FORMAT with the optional arguments.
74 * Note: `to print' without further qualifications means sending
84 (void)vsprintf(buf, format, ap);
86 if (player->flags & PF_UTF8)
87 /* normal text needs to be converted to user text */
88 upr_player(player, C_DATA, buf);
90 /* normal text and user text are identical */
91 pr_player(player, C_DATA, buf);
95 * Print UTF-8 text BUF to current player.
102 if (!(player->flags & PF_UTF8)) {
103 p = malloc(strlen(buf) + 1);
104 copy_utf8_to_ascii_no_funny(p, buf);
105 pr_player(player, C_DATA, p);
108 pr_player(player, C_DATA, buf);
112 * Send some text to P with id ID, line-buffered.
113 * Format text to send using printf-style FORMAT and optional
114 * arguments. It is assumed to be already user text. Plain ASCII and
115 * text received from the same player are fine, for anything else the
116 * caller has to deal with output filtering.
117 * If a partial line is buffered, terminate it with a newline first.
120 pr_id(struct player *p, int id, char *format, ...)
126 io_puts(p->iop, "\n");
129 va_start(ap, format);
130 (void)vsprintf(buf, format, ap);
132 pr_player(p, id, buf);
136 * Send C_FLASH text to PL.
137 * Format text to send using printf-style FORMAT and optional
138 * arguments. It is assumed to be UTF-8.
139 * Initiate an output queue flush, but do not wait for it to complete.
142 pr_flash(struct player *pl, char *format, ...)
144 char buf[4096]; /* UTF-8 */
147 if (pl->state != PS_PLAYING)
149 va_start(ap, format);
150 (void)vsprintf(buf, format, ap);
152 if (!(pl->flags & PF_UTF8))
153 copy_utf8_to_ascii_no_funny(buf, buf);
154 pr_player(pl, C_FLASH, buf);
155 io_output(pl->iop, 0);
159 * Send C_INFORM text to PL.
160 * Format text to send using printf-style FORMAT and optional
161 * arguments. It is assumed to be plain ASCII.
162 * Initiate an output queue flush, but do not wait for it to complete.
165 pr_inform(struct player *pl, char *format, ...)
170 if (pl->state != PS_PLAYING)
172 va_start(ap, format);
173 (void)vsprintf(buf, format, ap);
175 pr_player(pl, C_INFORM, buf);
176 io_output(pl->iop, 0);
180 * Send C_FLASH text to everyone.
181 * Format text to send using printf-style FORMAT and optional
182 * arguments. It is assumed to be plain ASCII.
183 * Prefix text it with a header suitable for broadcast from deity.
184 * Initiate an output queue flush, but do not wait for it to complete.
187 pr_wall(char *format, ...)
191 char buf[4096]; /* UTF-8 */
197 tm = localtime(&now);
198 n = sprintf(buf, "BROADCAST from %s @ %02d:%02d: ",
199 getnatp(0)->nat_cnam, tm->tm_hour, tm->tm_min);
201 va_start(ap, format);
202 (void)vsprintf(buf + n, format, ap);
204 for (p = player_next(NULL); p; p = player_next(p)) {
205 if (p->state != PS_PLAYING)
207 pr_player(p, C_FLASH, buf);
208 io_output(p->iop, 0);
213 * Send ID text BUF to PL, line-buffered.
215 * If a partial line with different id is buffered, terminate it with
219 pr_player(struct player *pl, int id, char *buf)
226 while (*bp != '\0') {
227 if (pl->curid != -1 && pl->curid != id) {
228 io_puts(pl->iop, "\n");
233 p = strchr(bp, '\n');
236 io_write(pl->iop, bp, len);
240 len = io_puts(pl->iop, bp);
246 while (io_output_if_queue_long(pl->iop,
247 pl->may_sleep == PLAYER_SLEEP_FREELY) > 0)
253 * Send ID text BUF to PL, line-buffered.
254 * This function translates from normal text to user text.
255 * If a partial line with different id is buffered, terminate it with
259 upr_player(struct player *pl, int id, char *buf)
270 while ((ch = *bp++)) {
271 if (pl->curid != -1 && pl->curid != id) {
272 io_puts(pl->iop, "\n");
281 io_puts(pl->iop, printbuf);
288 io_puts(pl->iop, printbuf);
293 io_write(pl->iop, &ch, 1);
297 io_puts(pl->iop, printbuf);
302 while (io_output_if_queue_long(pl->iop,
303 pl->may_sleep == PLAYER_SLEEP_FREELY) > 0)
310 * This runs always at the beginning of a line.
313 outid(struct player *pl, int n)
317 if (CANT_HAPPEN(n > C_LAST))
321 buf[0] = 'a' - 10 + n;
326 io_puts(pl->iop, buf);
331 * Send redirection request REDIR to the current player.
332 * REDIR is UTF-8, but non-ASCII characters can occur only if the
333 * player sent them. Therefore, it is also user text.
338 pr_id(player, *redir == '>' ? C_REDIR : C_PIPE, "%s\n", redir);
342 * Send script execute request FILE to the current player.
343 * REDIR is UTF-8, but non-ASCII characters can occur only if the
344 * player sent them. Therefore, it is also user text.
349 pr_id(player, C_EXECUTE, "%s\n", file);
353 * Send a command prompt to the current player.
356 prprompt(int min, int btu)
358 pr_id(player, C_PROMPT, "%d %d\n", min, btu);
362 * Prompt for a line of non-command input.
363 * Send C_FLUSH prompt PROMPT to the current player.
364 * Read a line of input into BUF[SIZE] and convert it to ASCII.
365 * This may block for input, yielding the processor. Flush buffered
366 * output when blocking, to make sure player sees the prompt.
367 * Return number of bytes in BUF[], not counting the terminating 0,
371 prmptrd(char *prompt, char *buf, int size)
375 if (CANT_HAPPEN(!prompt))
378 pr_id(player, C_FLUSH, "%s\n", prompt);
379 if ((r = recvclient(buf, size)) < 0)
381 time(&player->curup);
384 if (player->flags & PF_UTF8)
385 return copy_utf8_to_ascii_no_funny(buf, buf);
386 return copy_ascii_no_funny(buf, buf);
390 * Prompt for a line of non-command, UTF-8 input.
391 * Send C_FLUSH prompt PROMPT to the current player.
392 * Read a line of input into BUF[SIZE], replacing funny characters by
393 * '?'. The result is UTF-8.
394 * This may block for input, yielding the processor. Flush buffered
395 * output when blocking, to make sure player sees the prompt.
396 * Return number of bytes in BUF[], not counting the terminating 0,
400 uprmptrd(char *prompt, char *buf, int size)
404 if (CANT_HAPPEN(!prompt))
407 pr_id(player, C_FLUSH, "%s\n", prompt);
408 if ((r = recvclient(buf, size)) < 0)
410 time(&player->curup);
413 if (player->flags & PF_UTF8)
414 return copy_utf8_no_funny(buf, buf);
415 return copy_ascii_no_funny(buf, buf);
419 * Print the current time in ctime() format.
431 * Print coordinates X, Y.
432 * FORMAT must be a printf-style format string that converts exactly
436 prxy(char *format, coord x, coord y)
440 np = getnatp(player->cnum);
441 pr(format, xrel(np, x), yrel(np, y));
445 * Sound the current player's bell.
450 struct natstr *np = getnatp(player->cnum);
452 if (np->nat_flags & NF_BEEP)
457 * Print complete lines to country CN similar to printf().
458 * Use printf-style FORMAT with the optional arguments. FORMAT must
460 * If CN is zero, don't print anything.
461 * Else, if CN is the current player and we're not in the update,
462 * print just like pr(). Else print into a bulletin.
463 * Because printing like pr() requires normal text, and bulletins
464 * require user text, only plain ASCII is allowed.
467 mpr(int cn, char *format, ...)
472 CANT_HAPPEN(!format[0] || format[strlen(format) - 1] != '\n');
475 va_start(ap, format);
476 (void)vsprintf(buf, format, ap);
478 if (update_running || cn != player->cnum)
479 typed_wu(0, cn, buf, TEL_BULLETIN);
481 pr_player(player, C_DATA, buf);
485 * Copy SRC without funny characters to DST.
486 * Drop control characters, except for '\t'.
487 * Replace non-ASCII characters by '?'.
488 * Return length of DST.
489 * DST must have space. If it overlaps SRC, then DST <= SRC must
493 copy_ascii_no_funny(char *dst, char *src)
499 while ((ch = *src++)) {
500 if ((ch < 0x20 && ch != '\t' && ch != '\n') || ch == 0x7f)
501 ; /* ignore funny control */
503 *p++ = '?'; /* replace non-ASCII */
513 * Copy UTF-8 SRC without funny characters to DST.
514 * Drop control characters, except for '\t'.
515 * FIXME Replace malformed UTF-8 sequences by '?'.
516 * Return byte length of DST.
517 * DST must have space. If it overlaps SRC, then DST <= SRC must
521 copy_utf8_no_funny(char *dst, char *src)
527 while ((ch = *src++)) {
528 /* FIXME do the right thing for malformed and overlong sequences */
529 if ((ch < 0x20 && ch != '\t' && ch != '\n') || ch == 0x7f)
530 ; /* ignore funny control */
540 * Copy UTF-8 SRC without funny characters to ASCII DST.
541 * Drop control characters, except for '\t'.
542 * Replace non-ASCII characters by '?'.
543 * Return length of DST.
544 * DST must have space. If it overlaps SRC, then DST <= SRC must
548 copy_utf8_to_ascii_no_funny(char *dst, char *src)
554 while ((ch = *src++)) {
555 /* FIXME do the right thing for malformed and overlong sequences */
556 if ((ch < 0x20 && ch != '\t' && ch != '\n') || ch == 0x7f)
557 ; /* ignore funny control */
558 else if (ch > 0x7f) {
559 *p++ = '?'; /* replace non-ASCII */
560 while ((*src++ & 0xc0) == 0x80) ;
570 * Return byte-index of the N-th UTF-8 character in UTF-8 string S.
571 * If S doesn't have that many characters, return its length instead.
574 ufindpfx(char *s, int n)
579 if ((s[i++] & 0xc0) == 0xc0)
580 while ((s[i] & 0xc0) == 0x80)