2.9BSD - /usr/src/games/snake/snscore.c

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

Defined functions

Defined variables

Defined struct's

Defined macros