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/*-
* Copyright (c) 1991, 1993
* The Regents of the University of California. All rights reserved.
*
* The game adventure was originally written in Fortran by Will Crowther
* and Don Woods. It was later translated to C and enhanced by Jim
* Gillogly. This code is derived from software contributed to Berkeley
* by Jim Gillogly at The Rand Corporation.
*
* 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
#if 0
static char sccsid[] = "@(#)vocab.c 8.1 (Berkeley) 5/31/93";
#endif
static const char rcsid[] =
"$FreeBSD$";
#endif /* not lint */
/* Re-coding of advent in C: data structure routines */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <err.h>
#include "hdr.h"
void
dstroy(object)
int object;
{ move(object,0);
}
void
juggle(object)
int object;
{ int i,j;
i=place[object];
j=fixed[object];
move(object,i);
move(object+100,j);
}
void
move(object,where)
int object,where;
{ int from;
if (object<=100)
from=place[object];
else
from=fixed[object-100];
if (from>0 && from<=300) carry(object,from);
drop(object,where);
}
int
put(object,where,pval)
int object,where,pval;
{ move(object,where);
return(-1-pval);
}
void
carry(object,where)
int object,where;
{ int temp;
if (object<=100)
{ if (place[object]== -1) return;
place[object] = -1;
holdng++;
}
if (atloc[where]==object)
{ atloc[where]=linkx[object];
return;
}
for (temp=atloc[where]; linkx[temp]!=object; temp=linkx[temp]);
linkx[temp]=linkx[object];
}
void
drop(object,where)
int object,where;
{ if (object>100) fixed[object-100]=where;
else
{ if (place[object]== -1) holdng--;
place[object]=where;
}
if (where<=0) return;
linkx[object]=atloc[where];
atloc[where]=object;
}
int
vocab(word,type,value) /* look up or store a word */
const char *word;
int type; /* -2 for store, -1 for user word, >=0 for canned lookup*/
int value; /* used for storing only */
{ int adr;
const char *s;
char *t;
int hash, i;
struct hashtab *h;
for (hash=0,s=word,i=0; i<5 &&*s; i++) /* some kind of hash */
hash += *s++; /* add all chars in the word */
hash = (hash*3719)&077777; /* pulled that one out of a hat */
hash %= HTSIZE; /* put it into range of table */
for(adr=hash;; adr++) /* look for entry in table */
{ if (adr==HTSIZE) adr=0; /* wrap around */
h = &voc[adr]; /* point at the entry */
switch(type)
{ case -2: /* fill in entry */
if (h->val) /* already got an entry? */
goto exitloop2;
h->val=value;
h->atab=malloc(strlen(word)+1);
if (h->atab == NULL)
errx(1, "Out of memory!");
for (s=word,t=h->atab; *s;)
*t++ = *s++ ^ '=';
*t=0^'=';
/* encrypt slightly to thwart core reader */
/* printf("Stored \"%s\" (%d ch) as entry %d\n", */
/* word, strlen(word)+1, adr); */
return(0); /* entry unused */
case -1: /* looking up user word */
if (h->val==0) return(-1); /* not found */
for (s=word, t=h->atab;*t ^ '=';)
if ((*s++ ^ '=') != *t++)
goto exitloop2;
if ((*s ^ '=') != *t && s-word<5) goto exitloop2;
/* the word matched o.k. */
return(h->val);
default: /* looking up known word */
if (h->val==0)
{ errx(1, "Unable to find %s in vocab", word);
}
for (s=word, t=h->atab;*t ^ '=';)
if ((*s++ ^ '=') != *t++) goto exitloop2;
/* the word matched o.k. */
if (h->val/1000 != type) continue;
return(h->val%1000);
}
exitloop2: /* hashed entry does not match */
if (adr+1==hash || (adr==HTSIZE && hash==0))
{ errx(1, "Hash table overflow");
}
}
}
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