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Annotation of 43BSDTahoe/games/hack/hack.rumors.c, revision 1.1

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

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