apps/plugins/lib/highscore.c

   1 /***************************************************************************
   2  *             __________               __   ___.
   3  *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
   4  *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
   5  *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
   6  *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
   7  *                     \/            \/     \/    \/            \/
   8  * $Id$
   9  *
  10  * Copyright (C) 2005 Linus Nielsen Feltzing
  11  *
  12  * This program is free software; you can redistribute it and/or
  13  * modify it under the terms of the GNU General Public License
  14  * as published by the Free Software Foundation; either version 2
  15  * of the License, or (at your option) any later version.
  16  *
  17  * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
  18  * KIND, either express or implied.
  19  *
  20  ****************************************************************************/
  21 #include "plugin.h"
  22 #include "highscore.h"
  23
  24 int highscore_save(char *filename, struct highscore *scores, int num_scores)
  25 {
  26     int i;
  27     int fd;
  28     int rc;
  29     char buf[80];
  30
  31     fd = rb->open(filename, O_WRONLY|O_CREAT);
  32     if(fd < 0)
  33         return -1;
  34
  35     for(i = 0;i < num_scores;i++)
  36     {
  37         rb->snprintf(buf, sizeof(buf), "%d:%d:%s\n",
  38                      scores[i].score, scores[i].level, scores[i].name);
  39         rc = rb->write(fd, buf, rb->strlen(buf));
  40         if(rc < 0)
  41         {
  42             rb->close(fd);
  43             return -2;
  44         }
  45     }
  46     rb->close(fd);
  47     return 0;
  48 }
  49
  50 int highscore_load(char *filename, struct highscore *scores, int num_scores)
  51 {
  52     int i;
  53     int fd;
  54     char buf[80];
  55     char *score, *level, *name;
  56
  57     rb->memset(scores, 0, sizeof(struct highscore)*num_scores);
  58
  59     fd = rb->open(filename, O_RDONLY);
  60     if(fd < 0)
  61         return -1;
  62
  63     i = 0;
  64     while(rb->read_line(fd, buf, sizeof(buf)) > 0 && i < num_scores)
  65     {
  66         DEBUGF("%s\n", buf);
  67
  68         if ( !rb->settings_parseline(buf, &score, &level) )
  69             continue;
  70         if ( !rb->settings_parseline(level, &level, &name) )
  71             continue;
  72
  73         scores[i].score = rb->atoi(score);
  74         scores[i].level = rb->atoi(level);
  75         rb->strncpy(scores[i].name, name, sizeof(scores[i].name)-1);
  76         i++;
  77     }
  78     rb->close(fd);
  79     return 0;
  80 }
  81
  82 int highscore_update(int score, int level, const char *name,
  83                      struct highscore *scores, int num_scores)
  84 {
  85     int pos;
  86     struct highscore *entry;
  87
  88     if (!highscore_would_update(score, scores, num_scores))
  89         return -1;
  90
  91     pos = num_scores-1;
  92     while (pos > 0 && score > scores[pos-1].score)
  93     {
  94         /* move down one */
  95         rb->memcpy((void *)&scores[pos], (void *)&scores[pos-1],
  96                    sizeof(struct highscore));
  97         pos--;
  98     }
  99
 100     entry = scores + pos;
 101     entry->score = score;
 102     entry->level = level;
 103     rb->strncpy(entry->name, name, sizeof(entry->name));
 104     entry->name[sizeof(entry->name)-1] = '\0';
 105
 106     return pos;
 107 }
 108
 109 bool highscore_would_update(int score, struct highscore *scores,
 110                             int num_scores)
 111 {
 112     return (num_scores > 0) && (score > scores[num_scores-1].score);
 113 }