source: mainline/tetris/scores.c@ e1c4849

/*      $OpenBSD: scores.c,v 1.11 2006/04/20 03:25:36 ray Exp $ */
/*      $NetBSD: scores.c,v 1.2 1995/04/22 07:42:38 cgd Exp $   */

/*-
 * Copyright (c) 1992, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek and Darren F. Provine.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *      @(#)scores.c    8.1 (Berkeley) 5/31/93
 */

/*
 * Score code for Tetris, by Darren Provine (kilroy@gboro.glassboro.edu)
 * modified 22 January 1992, to limit the number of entries any one
 * person has.
 *
 * Major whacks since then.
 */
#include <errno.h>
/* #include <err.h> */
/* #include <fcntl.h> */
/* #include <pwd.h> */
/* #include <stdio.h> */
/* #include <stdlib.h> */
/* #include <string.h> */
/* #include <time.h> */
/* #include <term.h> */
/* #include <unistd.h> */
/* #include <sys/param.h> */
/* #include <sys/stat.h> */
/* #include <sys/types.h> */

#include "pathnames.h"
#include "screen.h"
#include "tetris.h"
#include "scores.h"

/*
 * Within this code, we can hang onto one extra "high score", leaving
 * room for our current score (whether or not it is high).
 *
 * We also sometimes keep tabs on the "highest" score on each level.
 * As long as the scores are kept sorted, this is simply the first one at
 * that level.
 */
#define NUMSPOTS (MAXHISCORES + 1)
#define NLEVELS (MAXLEVEL + 1)

/* static time_t now; */
/* static int nscores; */
/* static int gotscores; */
/* static struct highscore scores[NUMSPOTS]; */

/* static int checkscores(struct highscore *, int); */
/* static int cmpscores(const void *, const void *); */
/* static void getscores(FILE **); */
/* static void printem(int, int, struct highscore *, int, const char *); */
/* static char *thisuser(void); */

/*
 * Read the score file.  Can be called from savescore (before showscores)
 * or showscores (if savescore will not be called).  If the given pointer
 * is not NULL, sets *fpp to an open file pointer that corresponds to a
 * read/write score file that is locked with LOCK_EX.  Otherwise, the
 * file is locked with LOCK_SH for the read and closed before return.
 *
 * Note, we assume closing the stdio file releases the lock.
 */
/* static void */
/* getscores(FILE **fpp) */
/* { */
/*      int sd, mint, lck, mask, i; */
/*      char *mstr, *human; */
/*      FILE *sf; */

/*      if (fpp != NULL) { */
/*              mint = O_RDWR | O_CREAT; */
/*              mstr = "r+"; */
/*              human = "read/write"; */
/*              lck = LOCK_EX; */
/*      } else { */
/*              mint = O_RDONLY; */
/*              mstr = "r"; */
/*              human = "reading"; */
/*              lck = LOCK_SH; */
/*      } */
/*      setegid(egid); */
/*      mask = umask(S_IWOTH); */
/*      sd = open(_PATH_SCOREFILE, mint, 0666); */
/*      (void)umask(mask); */
/*      setegid(gid); */
/*      if (sd < 0) { */
/*              if (fpp == NULL) { */
/*                      nscores = 0; */
/*                      return; */
/*              } */
/*              err(1, "cannot open %s for %s", _PATH_SCOREFILE, human); */
/*      } */
/*      setegid(egid); */
/*      if ((sf = fdopen(sd, mstr)) == NULL) */
/*              err(1, "cannot fdopen %s for %s", _PATH_SCOREFILE, human); */
/*      setegid(gid); */

/*      /\* */
/*       * Grab a lock. */
/*       *\/ */
/*      if (flock(sd, lck)) */
/*              warn("warning: score file %s cannot be locked", */
/*                  _PATH_SCOREFILE); */

/*      nscores = fread(scores, sizeof(scores[0]), MAXHISCORES, sf); */
/*      if (ferror(sf)) */
/*              err(1, "error reading %s", _PATH_SCOREFILE); */
/*      for (i = 0; i < nscores; i++) */
/*              if (scores[i].hs_level < MINLEVEL || */
/*                  scores[i].hs_level > MAXLEVEL) */
/*                      errx(1, "scorefile %s corrupt", _PATH_SCOREFILE); */

/*      if (fpp) */
/*              *fpp = sf; */
/*      else */
/*              (void)fclose(sf); */
/* } */

void
savescore(int level)
{
        return;
}
/*      struct highscore *sp; */
/*      int i; */
/*      int change; */
/*      FILE *sf; */
/*      const char *me; */

/*      getscores(&sf); */
/*      gotscores = 1; */
/*      (void)time(&now); */

/*      /\* */
/*       * Allow at most one score per person per level -- see if we */
/*       * can replace an existing score, or (easiest) do nothing. */
/*       * Otherwise add new score at end (there is always room). */
/*       *\/ */
/*      change = 0; */
/*      me = thisuser(); */
/*      for (i = 0, sp = &scores[0]; i < nscores; i++, sp++) { */
/*              if (sp->hs_level != level || strcmp(sp->hs_name, me) != 0) */
/*                      continue; */
/*              if (score > sp->hs_score) { */
/*                      (void)printf("%s bettered %s %d score of %d!\n", */
/*                          "\nYou", "your old level", level, */
/*                          sp->hs_score * sp->hs_level); */
/*                      sp->hs_score = score;   /\* new score *\/ */
/*                      sp->hs_time = now;      /\* and time *\/ */
/*                      change = 1; */
/*              } else if (score == sp->hs_score) { */
/*                      (void)printf("%s tied %s %d high score.\n", */
/*                          "\nYou", "your old level", level); */
/*                      sp->hs_time = now;      /\* renew it *\/ */
/*                      change = 1;             /\* gotta rewrite, sigh *\/ */
/*              } /\* else new score < old score: do nothing *\/ */
/*              break; */
/*      } */
/*      if (i >= nscores) { */
/*              strlcpy(sp->hs_name, me, sizeof sp->hs_name); */
/*              sp->hs_level = level; */
/*              sp->hs_score = score; */
/*              sp->hs_time = now; */
/*              nscores++; */
/*              change = 1; */
/*      } */

/*      if (change) { */
/*              /\* */
/*               * Sort & clean the scores, then rewrite. */
/*               *\/ */
/*              nscores = checkscores(scores, nscores); */
/*              rewind(sf); */
/*              if (fwrite(scores, sizeof(*sp), nscores, sf) != nscores || */
/*                  fflush(sf) == EOF) */
/*                      warnx("error writing %s: %s\n\t-- %s", */
/*                          _PATH_SCOREFILE, strerror(errno), */
/*                          "high scores may be damaged"); */
/*      } */
/*      (void)fclose(sf);       /\* releases lock *\/ */
/* } */

/*
 * Get login name, or if that fails, get something suitable.
 * The result is always trimmed to fit in a score.
 */
/* static char * */
/* thisuser(void) */
/* { */
/*      const char *p; */
/*      struct passwd *pw; */
/*      static char u[sizeof(scores[0].hs_name)]; */

/*      if (u[0]) */
/*              return (u); */
/*      p = getlogin(); */
/*      if (p == NULL || *p == '\0') { */
/*              pw = getpwuid(getuid()); */
/*              if (pw != NULL) */
/*                      p = pw->pw_name; */
/*              else */
/*                      p = "  ???"; */
/*      } */
/*      strlcpy(u, p, sizeof(u)); */
/*      return (u); */
/* } */

/*
 * Score comparison function for qsort.
 *
 * If two scores are equal, the person who had the score first is
 * listed first in the highscore file.
 */
/* static int */
/* cmpscores(const void *x, const void *y) */
/* { */
/*      const struct highscore *a, *b; */
/*      long l; */

/*      a = x; */
/*      b = y; */
/*      l = (long)b->hs_level * b->hs_score - (long)a->hs_level * a->hs_score; */
/*      if (l < 0) */
/*              return (-1); */
/*      if (l > 0) */
/*              return (1); */
/*      if (a->hs_time < b->hs_time) */
/*              return (-1); */
/*      if (a->hs_time > b->hs_time) */
/*              return (1); */
/*      return (0); */
/* } */

/*
 * If we've added a score to the file, we need to check the file and ensure
 * that this player has only a few entries.  The number of entries is
 * controlled by MAXSCORES, and is to ensure that the highscore file is not
 * monopolised by just a few people.  People who no longer have accounts are
 * only allowed the highest score.  Scores older than EXPIRATION seconds are
 * removed, unless they are someone's personal best.
 * Caveat:  the highest score on each level is always kept.
 */
/* static int */
/* checkscores(struct highscore *hs, int num) */
/* { */
/*      struct highscore *sp; */
/*      int i, j, k, numnames; */
/*      int levelfound[NLEVELS]; */
/*      struct peruser { */
/*              char *name; */
/*              int times; */
/*      } count[NUMSPOTS]; */
/*      struct peruser *pu; */

/*      /\* */
/*       * Sort so that highest totals come first. */
/*       * */
/*       * levelfound[i] becomes set when the first high score for that */
/*       * level is encountered.  By definition this is the highest score. */
/*       *\/ */
/*      qsort((void *)hs, nscores, sizeof(*hs), cmpscores); */
/*      for (i = MINLEVEL; i < NLEVELS; i++) */
/*              levelfound[i] = 0; */
/*      numnames = 0; */
/*      for (i = 0, sp = hs; i < num;) { */
/*              /\* */
/*               * This is O(n^2), but do you think we care? */
/*               *\/ */
/*              for (j = 0, pu = count; j < numnames; j++, pu++) */
/*                      if (strcmp(sp->hs_name, pu->name) == 0) */
/*                              break; */
/*              if (j == numnames) { */
/*                      /\* */
/*                       * Add new user, set per-user count to 1. */
/*                       *\/ */
/*                      pu->name = sp->hs_name; */
/*                      pu->times = 1; */
/*                      numnames++; */
/*              } else { */
/*                      /\* */
/*                       * Two ways to keep this score: */
/*                       * - Not too many (per user), still has acct, & */
/*                       *      score not dated; or */
/*                       * - High score on this level. */
/*                       *\/ */
/*                      if ((pu->times < MAXSCORES && */
/*                           getpwnam(sp->hs_name) != NULL && */
/*                           sp->hs_time + EXPIRATION >= now) || */
/*                          levelfound[sp->hs_level] == 0) */
/*                              pu->times++; */
/*                      else { */
/*                              /\* */
/*                               * Delete this score, do not count it, */
/*                               * do not pass go, do not collect $200. */
/*                               *\/ */
/*                              num--; */
/*                              for (k = i; k < num; k++) */
/*                                      hs[k] = hs[k + 1]; */
/*                              continue; */
/*                      } */
/*              } */
/*              levelfound[sp->hs_level] = 1; */
/*              i++, sp++; */
/*      } */
/*      return (num > MAXHISCORES ? MAXHISCORES : num); */
/* } */

/*
 * Show current scores.  This must be called after savescore, if
 * savescore is called at all, for two reasons:
 * - Showscores munches the time field.
 * - Even if that were not the case, a new score must be recorded
 *   before it can be shown anyway.
 */
void
showscores(int level)
{
        return;
}

/*      struct highscore *sp; */
/*      int i, n, c; */
/*      const char *me; */
/*      int levelfound[NLEVELS]; */

/*      if (!gotscores) */
/*              getscores((FILE **)NULL); */
/*      (void)printf("\n\t\t    Tetris High Scores\n"); */

/*      /\* */
/*       * If level == 0, the person has not played a game but just asked for */
/*       * the high scores; we do not need to check for printing in highlight */
/*       * mode.  If SOstr is null, we can't do highlighting anyway. */
/*       *\/ */
/*      me = level && SOstr ? thisuser() : NULL; */

/*      /\* */
/*       * Set times to 0 except for high score on each level. */
/*       *\/ */
/*      for (i = MINLEVEL; i < NLEVELS; i++) */
/*              levelfound[i] = 0; */
/*      for (i = 0, sp = scores; i < nscores; i++, sp++) { */
/*              if (levelfound[sp->hs_level]) */
/*                      sp->hs_time = 0; */
/*              else { */
/*                      sp->hs_time = 1; */
/*                      levelfound[sp->hs_level] = 1; */
/*              } */
/*      } */

/*      /\* */
/*       * Page each screenful of scores. */
/*       *\/ */
/*      for (i = 0, sp = scores; i < nscores; sp += n) { */
/*              n = 20; */
/*              if (i + n > nscores) */
/*                      n = nscores - i; */
/*              printem(level, i + 1, sp, n, me); */
/*              if ((i += n) < nscores) { */
/*                      (void)printf("\nHit RETURN to continue."); */
/*                      (void)fflush(stdout); */
/*                      while ((c = getchar()) != '\n') */
/*                              if (c == EOF) */
/*                                      break; */
/*                      (void)printf("\n"); */
/*              } */
/*      } */

/*      if (nscores == 0) */
/*              printf("\t\t\t      - none to date.\n"); */
/* } */

/* static void */
/* printem(int level, int offset, struct highscore *hs, int n, const char *me) */
/* { */
/*      struct highscore *sp; */
/*      int row, highlight, i; */
/*      char buf[100]; */
/* #define      TITLE "Rank  Score   Name                          (points/level)" */
/* #define      TITL2 "==========================================================" */

/*      printf("%s\n%s\n", TITLE, TITL2); */

/*      highlight = 0; */

/*      for (row = 0; row < n; row++) { */
/*              sp = &hs[row]; */
/*              (void)snprintf(buf, sizeof(buf), */
/*                  "%3d%c %6d  %-31s (%6d on %d)\n", */
/*                  row + offset, sp->hs_time ? '*' : ' ', */
/*                  sp->hs_score * sp->hs_level, */
/*                  sp->hs_name, sp->hs_score, sp->hs_level); */
/*              /\* Print leaders every three lines *\/ */
/*              if ((row + 1) % 3 == 0) { */
/*                      for (i = 0; i < sizeof(buf); i++) */
/*                              if (buf[i] == ' ') */
/*                                      buf[i] = '_'; */
/*              } */
/*              /\* */
/*               * Highlight if appropriate.  This works because */
/*               * we only get one score per level. */
/*               *\/ */
/*              if (me != NULL && */
/*                  sp->hs_level == level && */
/*                  sp->hs_score == score && */
/*                  strcmp(sp->hs_name, me) == 0) { */
/*                      putpad(SOstr); */
/*                      highlight = 1; */
/*              } */
/*              (void)printf("%s", buf); */
/*              if (highlight) { */
/*                      putpad(SEstr); */
/*                      highlight = 0; */
/*              } */
/*      } */
/* } */