1 /* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */ 2 /* hack.rumors.c - version 1.0.3 */ 3 /* $FreeBSD: src/games/hack/hack.rumors.c,v 1.3 1999/11/16 02:57:10 billf Exp $ */ 4 /* $DragonFly: src/games/hack/hack.rumors.c,v 1.2 2003/06/17 04:25:24 dillon Exp $ */ 5 6 #include <stdio.h> 7 #include "hack.h" /* for RUMORFILE and BSD (index) */ 8 #define CHARSZ 8 /* number of bits in a char */ 9 extern long *alloc(); 10 extern char *index(); 11 int n_rumors = 0; 12 int n_used_rumors = -1; 13 char *usedbits; 14 15 init_rumors(rumf) FILE *rumf; { 16 int i; 17 n_used_rumors = 0; 18 while(skipline(rumf)) n_rumors++; 19 rewind(rumf); 20 i = n_rumors/CHARSZ; 21 usedbits = (char *) alloc((unsigned)(i+1)); 22 for( ; i>=0; i--) usedbits[i] = 0; 23 } 24 25 skipline(rumf) FILE *rumf; { 26 char line[COLNO]; 27 while(1) { 28 if(!fgets(line, sizeof(line), rumf)) return(0); 29 if(index(line, '\n')) return(1); 30 } 31 } 32 33 outline(rumf) FILE *rumf; { 34 char line[COLNO]; 35 char *ep; 36 if(!fgets(line, sizeof(line), rumf)) return; 37 if((ep = index(line, '\n')) != 0) *ep = 0; 38 pline("This cookie has a scrap of paper inside! It reads: "); 39 pline(line); 40 } 41 42 outrumor(){ 43 int rn,i; 44 FILE *rumf; 45 if(n_rumors <= n_used_rumors || 46 (rumf = fopen(RUMORFILE, "r")) == (FILE *) 0) return; 47 if(n_used_rumors < 0) init_rumors(rumf); 48 if(!n_rumors) goto none; 49 rn = rn2(n_rumors - n_used_rumors); 50 i = 0; 51 while(rn || used(i)) { 52 (void) skipline(rumf); 53 if(!used(i)) rn--; 54 i++; 55 } 56 usedbits[i/CHARSZ] |= (1 << (i % CHARSZ)); 57 n_used_rumors++; 58 outline(rumf); 59 none: 60 (void) fclose(rumf); 61 } 62 63 used(i) int i; { 64 return(usedbits[i/CHARSZ] & (1 << (i % CHARSZ))); 65 } 66