| 1 | /* |
| 2 | * Copyright (c) 1983 Regents of the University of California, |
| 3 | * All rights reserved. Redistribution permitted subject to |
| 4 | * the terms of the Berkeley Software License Agreement. |
| 5 | */ |
| 6 | |
| 7 | #ifndef lint |
| 8 | static char sccsid[] = "@(#)parse.c 1.2 %G%"; |
| 9 | #endif |
| 10 | |
| 11 | #include "externs.h" |
| 12 | |
| 13 | wordinit() |
| 14 | { |
| 15 | register struct wlist *w; |
| 16 | |
| 17 | for (w = wlist; w->string; w++) |
| 18 | install(w); |
| 19 | } |
| 20 | |
| 21 | hash(s) |
| 22 | register char *s; |
| 23 | { |
| 24 | register hashval = 0; |
| 25 | |
| 26 | while (*s) { |
| 27 | hashval += *s++; |
| 28 | hashval *= HASHMUL; |
| 29 | hashval &= HASHMASK; |
| 30 | } |
| 31 | return hashval; |
| 32 | } |
| 33 | |
| 34 | struct wlist * |
| 35 | lookup(s) |
| 36 | char *s; |
| 37 | { |
| 38 | register struct wlist *wp; |
| 39 | |
| 40 | for (wp = hashtab[hash(s)]; wp != NULL; wp = wp->next) |
| 41 | if (*s == *wp->string && strcmp(s, wp->string) == 0) |
| 42 | return wp; |
| 43 | return NULL; |
| 44 | } |
| 45 | |
| 46 | install(wp) |
| 47 | register struct wlist *wp; |
| 48 | { |
| 49 | int hashval; |
| 50 | |
| 51 | if (lookup(wp->string) == NULL) { |
| 52 | hashval = hash(wp->string); |
| 53 | wp->next = hashtab[hashval]; |
| 54 | hashtab[hashval] = wp; |
| 55 | } else |
| 56 | printf("Multiply defined %s.\n", wp->string); |
| 57 | } |
| 58 | |
| 59 | parse() |
| 60 | { |
| 61 | register struct wlist *wp; |
| 62 | register n; |
| 63 | |
| 64 | wordnumber = 0; /* for cypher */ |
| 65 | for (n = 0; n <= wordcount; n++) { |
| 66 | if ((wp = lookup(words[n])) == NULL) { |
| 67 | wordvalue[n] = -1; |
| 68 | wordtype[n] = -1; |
| 69 | } else { |
| 70 | wordvalue[n] = wp -> value; |
| 71 | wordtype[n] = wp -> article; |
| 72 | } |
| 73 | } |
| 74 | } |