diff options
Diffstat (limited to 'sail/misc.c')
| -rw-r--r-- | sail/misc.c | 233 |
1 files changed, 233 insertions, 0 deletions
diff --git a/sail/misc.c b/sail/misc.c new file mode 100644 index 00000000..15018ed7 --- /dev/null +++ b/sail/misc.c @@ -0,0 +1,233 @@ +/* + * Copyright (c) 1983 Regents of the University of California. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * 3. All advertising materials mentioning features or use of this software + * must display the following acknowledgement: + * This product includes software developed by the University of + * California, Berkeley and its contributors. + * 4. Neither the name of the University nor the names of its contributors + * may be used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef lint +static char sccsid[] = "@(#)misc.c 5.5 (Berkeley) 6/1/90"; +#endif /* not lint */ + +#include "externs.h" +#include "pathnames.h" + +#define distance(x,y) (abs(x) >= abs(y) ? abs(x) + abs(y)/2 : abs(y) + abs(x)/2) + +/* XXX */ +range(from, to) +struct ship *from, *to; +{ + register bow1r, bow1c, bow2r, bow2c; + int stern1r, stern1c, stern2c, stern2r; + register int bb, bs, sb, ss, result; + + if (!to->file->dir) + return -1; + stern1r = bow1r = from->file->row; + stern1c = bow1c = from->file->col; + stern2r = bow2r = to->file->row; + stern2c = bow2c = to->file->col; + result = bb = distance(bow2r - bow1r, bow2c - bow1c); + if (bb < 5) { + stern2r += dr[to->file->dir]; + stern2c += dc[to->file->dir]; + stern1r += dr[from->file->dir]; + stern1c += dc[from->file->dir]; + bs = distance((bow2r - stern1r), (bow2c - stern1c)); + sb = distance((bow1r - stern2r), (bow1c - stern2c)); + ss = distance((stern2r - stern1r) ,(stern2c - stern1c)); + result = min(bb, min(bs, min(sb, ss))); + } + return result; +} + +struct ship * +closestenemy(from, side, anyship) +register struct ship *from; +char side, anyship; +{ + register struct ship *sp; + register char a; + int olddist = 30000, dist; + struct ship *closest = 0; + + a = capship(from)->nationality; + foreachship(sp) { + if (sp == from) + continue; + if (sp->file->dir == 0) + continue; + if (a == capship(sp)->nationality && !anyship) + continue; + if (side && gunsbear(from, sp) != side) + continue; + dist = range(from, sp); + if (dist < olddist) { + closest = sp; + olddist = dist; + } + } + return closest; +} + +angle(dr, dc) +register dr, dc; +{ + register i; + + if (dc >= 0 && dr > 0) + i = 0; + else if (dr <= 0 && dc > 0) + i = 2; + else if (dc <= 0 && dr < 0) + i = 4; + else + i = 6; + dr = abs(dr); + dc = abs(dc); + if ((i == 0 || i == 4) && dc * 2.4 > dr) { + i++; + if (dc > dr * 2.4) + i++; + } else if ((i == 2 || i == 6) && dr * 2.4 > dc) { + i++; + if (dr > dc * 2.4) + i++; + } + return i % 8 + 1; +} + +gunsbear(from, to) /* checks for target bow or stern */ +register struct ship *from, *to; +{ + int Dr, Dc, i; + register ang; + + Dr = from->file->row - to->file->row; + Dc = to->file->col - from->file->col; + for (i = 2; i; i--) { + if ((ang = angle(Dr, Dc) - from->file->dir + 1) < 1) + ang += 8; + if (ang >= 2 && ang <= 4) + return 'r'; + if (ang >= 6 && ang <= 7) + return 'l'; + Dr += dr[to->file->dir]; + Dc += dc[to->file->dir]; + } + return 0; +} + +portside(from, on, quick) +register struct ship *from, *on; +int quick; /* returns true if fromship is */ +{ /* shooting at onship's starboard side */ + register ang; + register Dr, Dc; + + Dr = from->file->row - on->file->row; + Dc = on->file->col - from->file->col; + if (quick == -1) { + Dr += dr[on->file->dir]; + Dc += dc[on->file->dir]; + } + ang = angle(Dr, Dc); + if (quick != 0) + return ang; + ang = (ang + 4 - on->file->dir - 1) % 8 + 1; + return ang < 5; +} + +colours(sp) +register struct ship *sp; +{ + register char flag; + + if (sp->file->struck) + flag = '!'; + if (sp->file->explode) + flag = '#'; + if (sp->file->sink) + flag = '~'; + if (sp->file->struck) + return flag; + flag = *countryname[capship(sp)->nationality]; + return sp->file->FS ? flag : tolower(flag); +} + +#include <sys/file.h> +log(s) +register struct ship *s; +{ + FILE *fp; + int persons; + int n; + struct logs log[NLOG]; + float net; + register struct logs *lp; + + if ((fp = fopen(_PATH_LOGFILE, "r+")) == NULL) + return; +#ifdef LOCK_EX + if (flock(fileno(fp), LOCK_EX) < 0) + return; +#endif + net = (float)s->file->points / s->specs->pts; + persons = getw(fp); + n = fread((char *)log, sizeof(struct logs), NLOG, fp); + for (lp = &log[n]; lp < &log[NLOG]; lp++) + lp->l_name[0] = lp->l_uid = lp->l_shipnum + = lp->l_gamenum = lp->l_netpoints = 0; + rewind(fp); + if (persons < 0) + (void) putw(1, fp); + else + (void) putw(persons + 1, fp); + for (lp = log; lp < &log[NLOG]; lp++) + if (net > (float)lp->l_netpoints + / scene[lp->l_gamenum].ship[lp->l_shipnum].specs->pts) { + (void) fwrite((char *)log, + sizeof (struct logs), lp - log, fp); + (void) strcpy(log[NLOG-1].l_name, s->file->captain); + log[NLOG-1].l_uid = getuid(); + log[NLOG-1].l_shipnum = s->file->index; + log[NLOG-1].l_gamenum = game; + log[NLOG-1].l_netpoints = s->file->points; + (void) fwrite((char *)&log[NLOG-1], + sizeof (struct logs), 1, fp); + (void) fwrite((char *)lp, + sizeof (struct logs), &log[NLOG-1] - lp, fp); + break; + } +#ifdef LOCK_EX + (void) flock(fileno(fp), LOCK_UN); +#endif + (void) fclose(fp); +} |