console.c

   1 /*
   2    Cantaveria - action adventure platform game
   3    Copyright (C) 2009 2010 Evan Rinehart
   4
   5    This program is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU General Public License
   7    as published by the Free Software Foundation; either version 2
   8    of the License, or (at your option) any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to
  17
  18    The Free Software Foundation, Inc.
  19    51 Franklin Street, Fifth Floor
  20    Boston, MA  02110-1301, USA
  21
  22    evanrinehart@gmail.com
  23 */
  24
  25 #include <stdio.h>
  26 #include <string.h>
  27 #include <stdarg.h>
  28
  29 #include <graphics.h>
  30 #include <console.h>
  31
  32
  33 char console[25][80];
  34 int console_time[25];
  35 int console_ptr = 0;
  36 int console_timer = 0;
  37
  38 void console_clear(){
  39         console_ptr = 0;
  40 }
  41
  42 void console_scroll(int n){
  43         int i;
  44         if(console_ptr - n < 0) n = console_ptr;
  45         if(n == 0) return;
  46         for(i=n; i<25; i++){
  47                 memcpy(console[i-n], console[i], 80);
  48         }
  49         console[25-n][0] = '\0';
  50         console_ptr -= n;
  51 }
  52
  53 void console_update(){
  54         if(console_timer == 0) return;
  55         console_timer -= 1;
  56         if(console_timer == 0 && console_ptr > 0){
  57                 console_scroll(1);
  58                 console_timer = 10;
  59         }
  60 }
  61
  62 void console_printf(char* format, ...){
  63         if(console_ptr==25){
  64                 console_scroll(1);
  65         }
  66         va_list ap;
  67         va_start(ap, format);
  68         vsnprintf(console[console_ptr], 80, format, ap);
  69         console[console_ptr][79] = '\0';
  70         console_ptr++;
  71         console_timer = 200;
  72         va_end(ap);
  73 }
  74
  75 void console_draw(){
  76         int i;
  77         for(i=0; i<console_ptr; i++){
  78                 printf_small(1,9*i+1,"%s",console[i]);
  79         }
  80 }
  81