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"
66 static void pr_player(struct player *pl, int id, char *buf);
67 static void upr_player(struct player *pl, int id, char *buf);
68 static void outid(struct player *pl, int n);
71 * Print to current player similar to printf().
72 * Use printf-style FORMAT with the optional arguments.
73 * Note: `to print' without further qualifications means sending
83 (void)vsprintf(buf, format, ap);
85 if (player->flags & PF_UTF8)
86 /* normal text needs to be converted to user text */
87 upr_player(player, C_DATA, buf);
89 /* normal text and user text are identical */
90 pr_player(player, C_DATA, buf);
94 * Print UTF-8 text BUF to current player.
101 if (!(player->flags & PF_UTF8)) {
102 p = malloc(strlen(buf) + 1);
103 copy_utf8_to_ascii_no_funny(p, buf);
104 pr_player(player, C_DATA, p);
107 pr_player(player, C_DATA, buf);
111 * Send some text to P with id ID, line-buffered.
112 * Format text to send using printf-style FORMAT and optional
113 * arguments. It is assumed to be already user text. Plain ASCII and
114 * text received from the same player are fine, for anything else the
115 * caller has to deal with output filtering.
116 * If a partial line is buffered, terminate it with a newline first.
119 pr_id(struct player *p, int id, char *format, ...)
125 io_puts(p->iop, "\n");
128 va_start(ap, format);
129 (void)vsprintf(buf, format, ap);
131 pr_player(p, id, buf);
135 * Send C_FLASH text to PL.
136 * Format text to send using printf-style FORMAT and optional
137 * arguments. It is assumed to be UTF-8.
138 * Initiate an output queue flush, but do not wait for it to complete.
141 pr_flash(struct player *pl, char *format, ...)
143 char buf[4096]; /* UTF-8 */
146 if (pl->state != PS_PLAYING)
148 va_start(ap, format);
149 (void)vsprintf(buf, format, ap);
151 if (!(pl->flags & PF_UTF8))
152 copy_utf8_to_ascii_no_funny(buf, buf);
153 pr_player(pl, C_FLASH, buf);
154 io_output(pl->iop, 0);
158 * Send C_INFORM text to PL.
159 * Format text to send using printf-style FORMAT and optional
160 * arguments. It is assumed to be plain ASCII.
161 * Initiate an output queue flush, but do not wait for it to complete.
164 pr_inform(struct player *pl, char *format, ...)
169 if (pl->state != PS_PLAYING)
171 va_start(ap, format);
172 (void)vsprintf(buf, format, ap);
174 pr_player(pl, C_INFORM, buf);
175 io_output(pl->iop, 0);
179 * Send C_FLASH text to everyone.
180 * Format text to send using printf-style FORMAT and optional
181 * arguments. It is assumed to be plain ASCII.
182 * Prefix text it with a header suitable for broadcast from deity.
183 * Initiate an output queue flush, but do not wait for it to complete.
186 pr_wall(char *format, ...)
190 char buf[4096]; /* UTF-8 */
196 tm = localtime(&now);
197 n = sprintf(buf, "BROADCAST from %s @ %02d:%02d: ",
198 getnatp(0)->nat_cnam, tm->tm_hour, tm->tm_min);
200 va_start(ap, format);
201 (void)vsprintf(buf + n, format, ap);
203 for (p = player_next(NULL); p; p = player_next(p)) {
204 if (p->state != PS_PLAYING)
206 pr_player(p, C_FLASH, buf);
207 io_output(p->iop, 0);
212 * Send ID text BUF to PL, line-buffered.
214 * If a partial line with different id is buffered, terminate it with
218 pr_player(struct player *pl, int id, char *buf)
225 while (*bp != '\0') {
226 if (pl->curid != -1 && pl->curid != id) {
227 io_puts(pl->iop, "\n");
232 p = strchr(bp, '\n');
235 io_write(pl->iop, bp, len);
239 len = io_puts(pl->iop, bp);
245 while (io_output_if_queue_long(pl->iop,
246 pl->may_sleep == PLAYER_SLEEP_FREELY) > 0)
252 * Send ID text BUF to PL, line-buffered.
253 * This function translates from normal text to user text.
254 * If a partial line with different id is buffered, terminate it with
258 upr_player(struct player *pl, int id, char *buf)
269 while ((ch = *bp++)) {
270 if (pl->curid != -1 && pl->curid != id) {
271 io_puts(pl->iop, "\n");
280 io_puts(pl->iop, printbuf);
287 io_puts(pl->iop, printbuf);
292 io_write(pl->iop, &ch, 1);
296 io_puts(pl->iop, printbuf);
301 while (io_output_if_queue_long(pl->iop,
302 pl->may_sleep == PLAYER_SLEEP_FREELY) > 0)
309 * This runs always at the beginning of a line.
312 outid(struct player *pl, int n)
316 if (CANT_HAPPEN(n > C_LAST))
320 buf[0] = 'a' - 10 + n;
325 io_puts(pl->iop, buf);
330 * Send redirection request REDIR to the current player.
331 * REDIR is UTF-8, but non-ASCII characters can occur only if the
332 * player sent them. Therefore, it is also user text.
337 pr_id(player, *redir == '>' ? C_REDIR : C_PIPE, "%s\n", redir);
341 * Send script execute request FILE to the current player.
342 * REDIR is UTF-8, but non-ASCII characters can occur only if the
343 * player sent them. Therefore, it is also user text.
348 pr_id(player, C_EXECUTE, "%s\n", file);
352 * Send a command prompt to the current player.
355 prprompt(int min, int btu)
357 pr_id(player, C_PROMPT, "%d %d\n", min, btu);
361 * Prompt for a line of non-command input.
362 * Send C_FLUSH prompt PROMPT to the current player.
363 * Read a line of input into BUF[SIZE] and convert it to ASCII.
364 * This may block for input, yielding the processor. Flush buffered
365 * output when blocking, to make sure player sees the prompt.
366 * Return number of bytes in BUF[], not counting the terminating 0,
370 prmptrd(char *prompt, char *buf, int size)
374 if (CANT_HAPPEN(!prompt))
377 pr_id(player, C_FLUSH, "%s\n", prompt);
378 if ((r = recvclient(buf, size)) < 0)
380 time(&player->curup);
383 if (player->flags & PF_UTF8)
384 return copy_utf8_to_ascii_no_funny(buf, buf);
385 return copy_ascii_no_funny(buf, buf);
389 * Prompt for a line of non-command, UTF-8 input.
390 * Send C_FLUSH prompt PROMPT to the current player.
391 * Read a line of input into BUF[SIZE], replacing funny characters by
392 * '?'. The result is UTF-8.
393 * This may block for input, yielding the processor. Flush buffered
394 * output when blocking, to make sure player sees the prompt.
395 * Return number of bytes in BUF[], not counting the terminating 0,
399 uprmptrd(char *prompt, char *buf, int size)
403 if (CANT_HAPPEN(!prompt))
406 pr_id(player, C_FLUSH, "%s\n", prompt);
407 if ((r = recvclient(buf, size)) < 0)
409 time(&player->curup);
412 if (player->flags & PF_UTF8)
413 return copy_utf8_no_funny(buf, buf);
414 return copy_ascii_no_funny(buf, buf);
418 * Print the current time in ctime() format.
430 * Print coordinates X, Y.
431 * FORMAT must be a printf-style format string that converts exactly
435 prxy(char *format, coord x, coord y)
439 np = getnatp(player->cnum);
440 pr(format, xrel(np, x), yrel(np, y));
444 * Sound the current player's bell.
449 struct natstr *np = getnatp(player->cnum);
451 if (np->nat_flags & NF_BEEP)
456 * Print complete lines to country CN similar to printf().
457 * Use printf-style FORMAT with the optional arguments. FORMAT must
459 * If CN is zero, don't print anything.
460 * Else, if CN is the current player and we're not in the update,
461 * print just like pr(). Else print into a bulletin.
462 * Because printing like pr() requires normal text, and bulletins
463 * require user text, only plain ASCII is allowed.
466 mpr(int cn, char *format, ...)
471 CANT_HAPPEN(!format[0] || format[strlen(format) - 1] != '\n');
474 va_start(ap, format);
475 (void)vsprintf(buf, format, ap);
477 if (update_running || cn != player->cnum)
478 typed_wu(0, cn, buf, TEL_BULLETIN);
480 pr_player(player, C_DATA, buf);
484 * Copy SRC without funny characters to DST.
485 * Drop control characters, except for '\t'.
486 * Replace non-ASCII characters by '?'.
487 * Return length of DST.
488 * DST must have space. If it overlaps SRC, then DST <= SRC must
492 copy_ascii_no_funny(char *dst, char *src)
498 while ((ch = *src++)) {
499 if ((ch < 0x20 && ch != '\t' && ch != '\n') || ch == 0x7f)
500 ; /* ignore funny control */
502 *p++ = '?'; /* replace non-ASCII */
512 * Copy UTF-8 SRC without funny characters to DST.
513 * Drop control characters, except for '\t'.
514 * FIXME Replace malformed UTF-8 sequences by '?'.
515 * Return byte length of DST.
516 * DST must have space. If it overlaps SRC, then DST <= SRC must
520 copy_utf8_no_funny(char *dst, char *src)
526 while ((ch = *src++)) {
527 /* FIXME do the right thing for malformed and overlong sequences */
528 if ((ch < 0x20 && ch != '\t' && ch != '\n') || ch == 0x7f)
529 ; /* ignore funny control */
539 * Copy UTF-8 SRC without funny characters to ASCII DST.
540 * Drop control characters, except for '\t'.
541 * Replace non-ASCII characters by '?'.
542 * Return length of DST.
543 * DST must have space. If it overlaps SRC, then DST <= SRC must
547 copy_utf8_to_ascii_no_funny(char *dst, char *src)
553 while ((ch = *src++)) {
554 /* FIXME do the right thing for malformed and overlong sequences */
555 if ((ch < 0x20 && ch != '\t' && ch != '\n') || ch == 0x7f)
556 ; /* ignore funny control */
557 else if (ch > 0x7f) {
558 *p++ = '?'; /* replace non-ASCII */
559 while ((*src++ & 0xc0) == 0x80) ;
569 * Return byte-index of the N-th UTF-8 character in UTF-8 string S.
570 * If S doesn't have that many characters, return its length instead.
573 ufindpfx(char *s, int n)
578 if ((s[i++] & 0xc0) == 0xc0)
579 while ((s[i] & 0xc0) == 0x80)