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Annotation of 42BSD/games/snake/snscore.c, revision 1.1

1.1     ! root        1: #ifndef lint
        !             2: static char sccsid[] = "@(#)snscore.c  4.1 (Berkeley) 7/4/83";
        !             3: #endif
        !             4: 
        !             5: #include <stdio.h>
        !             6: #include <pwd.h>
        !             7: char *recfile = "/usr/games/lib/snakerawscores";
        !             8: #define MAXPLAYERS 256
        !             9: 
        !            10: struct passwd  *getpwuid();
        !            11: char   *malloc();
        !            12: 
        !            13: struct player  {
        !            14:        short   uids;
        !            15:        short   scores;
        !            16:        char    *name;
        !            17: } players[MAXPLAYERS], temp;
        !            18: 
        !            19: main()
        !            20: {
        !            21:        char    buf[80], cp;
        !            22:        short   uid, score;
        !            23:        FILE    *fd;
        !            24:        int     noplayers;
        !            25:        int     i, j, notsorted;
        !            26:        short   whoallbest, allbest;
        !            27:        char    *q;
        !            28:        struct  passwd  *p;
        !            29: 
        !            30:        fd = fopen(recfile, "r");
        !            31:        if (fd == NULL) {
        !            32:                perror(recfile);
        !            33:                exit(1);
        !            34:        }
        !            35:        printf("Snake players scores to date\n");
        !            36:        fread(&whoallbest, sizeof(short), 1, fd);
        !            37:        fread(&allbest, sizeof(short), 1, fd);
        !            38:        for (uid=2;;uid++) {
        !            39:                if(fread(&score, sizeof(short), 1, fd) == 0)
        !            40:                        break;
        !            41:                if (score > 0) {
        !            42:                        if (noplayers > MAXPLAYERS) {
        !            43:                                printf("too many players\n");
        !            44:                                exit(2);
        !            45:                        }
        !            46:                        players[noplayers].uids = uid;
        !            47:                        players[noplayers].scores = score;
        !            48:                        /* This is faster if passwd is sorted by uid. */
        !            49:                        p = getpwuid(uid);
        !            50:                        if (p == NULL)
        !            51:                                continue;
        !            52:                        q = p -> pw_name;
        !            53:                        players[noplayers].name = malloc(strlen(q)+1);
        !            54:                        strcpy(players[noplayers].name, q);
        !            55:                        noplayers++;
        !            56:                }
        !            57:        }
        !            58: 
        !            59:        /* bubble sort scores */
        !            60:        for (notsorted=1; notsorted; ) {
        !            61:                notsorted = 0;
        !            62:                for (i=0; i<noplayers-1; i++)
        !            63:                        if (players[i].scores < players[i+1].scores) {
        !            64:                                temp = players[i];
        !            65:                                players[i] = players[i+1];
        !            66:                                players[i+1] = temp;
        !            67:                                notsorted++;
        !            68:                        }
        !            69:        }
        !            70: 
        !            71:        j = 1;
        !            72:        for (i=0; i<noplayers; i++) {
        !            73:                printf("%d:\t$%d\t%s\n", j, players[i].scores, players[i].name);
        !            74:                if (players[i].scores > players[i+1].scores)
        !            75:                        j = i+2;
        !            76:        }
        !            77:        exit(0);
        !            78: }
        !            79: 
        !            80: struct passwd *
        !            81: getpwuid(uid)
        !            82: register uid;
        !            83: {
        !            84:        register struct passwd *p;
        !            85:        struct passwd *getpwent();
        !            86: 
        !            87:        while( (p = getpwent()) && p->pw_uid != uid );
        !            88:        if (p->pw_uid == uid)
        !            89:                return(p);
        !            90:        setpwent();
        !            91:        while( (p = getpwent()) && p->pw_uid != uid );
        !            92:        endpwent();
        !            93:        return(p);
        !            94: }

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