apps/cd/main.c

   1
   2 #define WHITE_TXT 0x07 // white on black text
   3
   4 void acls ();
   5 unsigned int printf (char *message, unsigned len, unsigned line);
   6 extern void puts (unsigned char *text);
   7
   8 void *memcpy (void *dst_ptr, const void *src_ptr, unsigned count)
   9 {
  10         void *ret_val = dst_ptr;
  11         const char *src = (const char *)src_ptr;
  12         char *dst = (char *)dst_ptr;
  13
  14 /* copy up */
  15         for(; count != 0; count--)
  16                 *dst++ = *src++;
  17         return ret_val;
  18 }
  19
  20 int main () // like main in a normal C program
  21 {
  22 /*      acls ();
  23         //k_clear_screen();
  24         //init_video ();
  25         unsigned char *text = 0x1000;
  26         memcpy (text, "Welcome in test app", 19);
  27         text[19] = '\0';
  28         //k_printf("Hi!How's ?", 4, 0);
  29         //k_printf("Tak to je moc hezkyy", 20, 5);
  30         //puts (text);
  31         printf (text, 19, 1);
  32         printf (text, 19, 5);*/
  33         //free (text);
  34
  35         return 1;
  36 }
  37
  38
  39 void acls () // clear the entire text screen
  40 {
  41         char *vidmem = (char *) 0xb8000;
  42         unsigned int i=0;
  43
  44         while(i < (80*25*2))
  45         {
  46                 vidmem[i] = ' ';
  47                 i++;
  48                 vidmem[i] = WHITE_TXT;
  49                 i++;
  50         }
  51 }
  52
  53 unsigned int printf (char *message, unsigned len, unsigned line) // the message and then the line #
  54 {
  55         char *vidmem = (char *) 0xb8000;
  56
  57         unsigned i = (line*80*2);
  58         unsigned y = 0;
  59 /*      vidmem[i] = message[0];
  60         vidmem[i+2] = message[1];
  61         vidmem[i+4] = message[2];
  62         vidmem[i+6] = message[3];*/
  63
  64         /*char *vidmem = (char *) 0xb8000;
  65         unsigned int i = 0, y = 0;
  66
  67         i = (line*80*2);
  68
  69         for (y = 0; y < len; y ++)
  70         {
  71                 vidmem[i] = message[y];
  72                 vidmem[i+1] = WHITE_TXT;
  73                 i += 2;
  74         }*/
  75
  76         while (y < len)
  77         {
  78                 if (message[y] == '\n') // check for a new line
  79                 {
  80                         line ++;
  81                         i = (line*80*2);
  82                 } else {
  83                         vidmem[i] = message[y];
  84                         i ++;
  85                         vidmem[i] = WHITE_TXT;
  86                         i ++;
  87                 }
  88
  89                 y ++;
  90         }
  91
  92         return 1;
  93 }