262 lines
7.5 KiB
C
262 lines
7.5 KiB
C
/* $NetBSD: hack.o_init.c,v 1.15 2023/07/30 09:23:21 pho Exp $ */
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/*
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* Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
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* Amsterdam
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* - Neither the name of the Stichting Centrum voor Wiskunde en
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* Informatica, nor the names of its contributors may be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: hack.o_init.c,v 1.15 2023/07/30 09:23:21 pho Exp $");
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#endif /* not lint */
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#include <string.h>
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#include "hack.h"
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#include "extern.h"
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#include "def.objects.h"
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#include "hack.onames.h" /* for LAST_GEM */
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static void setgemprobs(void);
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static int interesting_to_discover(int);
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int
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letindex(int let)
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{
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int i = 0;
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char ch;
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while ((ch = obj_symbols[i++]) != 0)
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if (ch == let)
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return (i);
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return (0);
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}
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void
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init_objects(void)
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{
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int i, j, first, last, sum, end;
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char let;
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const char *tmp;
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/*
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* init base; if probs given check that they add up to 100, otherwise
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* compute probs; shuffle descriptions
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*/
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end = SIZE(objects);
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first = 0;
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while (first < end) {
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let = objects[first].oc_olet;
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last = first + 1;
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while (last < end && objects[last].oc_olet == let
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&& objects[last].oc_name != NULL)
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last++;
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i = letindex(let);
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if ((!i && let != ILLOBJ_SYM) || bases[i] != 0)
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error("initialization error");
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bases[i] = first;
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if (let == GEM_SYM)
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setgemprobs();
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check:
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sum = 0;
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for (j = first; j < last; j++)
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sum += objects[j].oc_prob;
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if (sum == 0) {
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for (j = first; j < last; j++)
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objects[j].oc_prob = (100 + j - first) / (last - first);
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goto check;
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}
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if (sum != 100)
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error("init-prob error for %c", let);
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if (objects[first].oc_descr != NULL && let != TOOL_SYM) {
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/* shuffle, also some additional descriptions */
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while (last < end && objects[last].oc_olet == let)
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last++;
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j = last;
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while (--j > first) {
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i = first + rn2(j + 1 - first);
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tmp = objects[j].oc_descr;
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objects[j].oc_descr = objects[i].oc_descr;
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objects[i].oc_descr = tmp;
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}
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}
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first = last;
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}
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}
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int
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probtype(int let)
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{
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int i = bases[letindex(let)];
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int prob = rn2(100);
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while ((prob -= objects[i].oc_prob) >= 0)
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i++;
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if (objects[i].oc_olet != let || !objects[i].oc_name)
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panic("probtype(%c) error, i=%d", let, i);
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return (i);
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}
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static void
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setgemprobs(void)
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{
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int j, first;
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first = bases[letindex(GEM_SYM)];
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for (j = 0; j < 9 - dlevel / 3; j++)
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objects[first + j].oc_prob = 0;
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first += j;
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if (first >= LAST_GEM || first >= SIZE(objects) ||
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objects[first].oc_olet != GEM_SYM ||
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objects[first].oc_name == NULL)
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printf("Not enough gems? - first=%d j=%d LAST_GEM=%d\n",
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first, j, LAST_GEM);
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for (j = first; j < LAST_GEM; j++)
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objects[j].oc_prob = (20 + j - first) / (LAST_GEM - first);
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}
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void
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oinit(void)
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{ /* level dependent initialization */
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setgemprobs();
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}
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void
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savenames(int fd)
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{
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int i;
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size_t len;
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bwrite(fd, bases, sizeof bases);
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bwrite(fd, objects, sizeof objects);
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/*
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* We must save not only oc_uname but also oc_name and oc_descr,
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* because they are string constants whose pointer values aren't
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* peristent when ASLR is enabled.
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*/
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for (i = 0; i < SIZE(objects); i++) {
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#define SAVE_NAME_FIELD(FIELD) \
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if (objects[i].FIELD) { \
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len = strlen(objects[i].FIELD) + 1; \
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bwrite(fd, &len, sizeof len); \
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bwrite(fd, objects[i].FIELD, len); \
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}
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SAVE_NAME_FIELD(oc_name);
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SAVE_NAME_FIELD(oc_descr);
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SAVE_NAME_FIELD(oc_uname);
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#undef SAVE_NAME_FIELD
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}
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}
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void
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restnames(int fd)
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{
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int i;
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size_t len;
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mread(fd, bases, sizeof bases);
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mread(fd, objects, sizeof objects);
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for (i = 0; i < SIZE(objects); i++) {
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#define RESTORE_NAME_FIELD(FIELD) \
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if (objects[i].FIELD) { \
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mread(fd, &len, sizeof len); \
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objects[i].FIELD = alloc(len); \
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mread(fd, __UNCONST(objects[i].FIELD), len); \
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}
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/*
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* This leaks memory but who cares? Restoration only
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* happens on the process startup.
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*/
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RESTORE_NAME_FIELD(oc_name);
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RESTORE_NAME_FIELD(oc_descr);
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RESTORE_NAME_FIELD(oc_uname);
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#undef RESTORE_NAME_FIELD
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}
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}
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int
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dodiscovered(void)
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{ /* free after Robert Viduya */
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int i, end;
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int ct = 0;
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cornline(0, "Discoveries");
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end = SIZE(objects);
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for (i = 0; i < end; i++) {
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if (interesting_to_discover(i)) {
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ct++;
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cornline(1, typename(i));
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}
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}
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if (ct == 0) {
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pline("You haven't discovered anything yet...");
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cornline(3, NULL);
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} else
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cornline(2, NULL);
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return (0);
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}
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static int
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interesting_to_discover(int i)
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{
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return (
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objects[i].oc_uname != NULL ||
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(objects[i].oc_name_known && objects[i].oc_descr != NULL)
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);
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}
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