Text 138, 174 rader
Skriven 2005-01-29 20:03:34 av Hans Andersson (2:201/209.0)
     Kommentar till en text av All...
Ärende: FSM machine?
====================
/* FSM machine - a quick test hack today - need an ansi decoder
 * any bright ideas?
 */
#include <stdio.h>
#include <string.h>
 
void push(int num);
int  decode(char ch);
int  pop(void);
void reset(void);
int  test(const char str[]);
 
enum {ANSI_NONE, ANSI_CLS, ANSI_COLORS, ANSI_YX}; /* ... */
 
struct fifo_t
 {
  int array[ 10 ];
  int count;
  int ix;
 };
 
int main()
{
char str[] = "\x1b[2;33;44m";
char locate[] = "\x1b[5;12H";
char clear[] = "\x1b[2J";
int st;
 
st = test(str);
st = test(clear);
st = test(locate);
 
return 0;
}
 
int test(const char str[])
{
size_t n;
int fg;
int st;
for (n = 0; n < strlen(str); n++)
 {
   st = decode(str[ n ]);
   if (st)
      {
        break;
      }
 }
 
if (st)
   {
     printf("\nANSI...");
     while ((fg = pop()) != -1)
       {
          printf("\nValue: %d", fg);
       }
   }
else
   {
     printf("\nNo match");
   }
 
return st;
}
 
static struct fifo_t fifo;
void push(int num)
{
if (fifo.count < 10)
   {
     /* printf("\npush num %d", num); */
     fifo.array[ fifo.count++ ] = num;
   }
 
}
 
int pop(void)
{
if (fifo.count)
   {
     fifo.count--;
     return fifo.array[ fifo.ix++ ];
   }
 
return -1;
}
 
void reset(void)
{
fifo.ix = 0;
fifo.count = 0;
}
 
int decode(char ch)
{
int result = 0;
static int state;
static long num;
static count;
 
if (state == 0 && ch != 27)
   {
      return 0;
   }
 
switch (ch)
 {
    case 27: state = 1; break;
    case '[':
      state = (state) ? 1 : 0;
      count = 0;
      reset();
      break;
    case '0':
    case '1':
    case '2':
    case '3':
    case '4':
    case '5':
    case '6':
    case '7':
    case '8':
    case '9':
        count++;
        switch (state)
          {
            case 1:
              state = 2;
              num = 0;
              num = ch - '0';
              break;
            case 2:
              num *= 10;
              num += ch - '0';
              break;
            default:
              state = 0;
              reset();
          };
         break;
    case ';':
      if (state == 2)
         {
           state = 1;
           push((int) num);
         }
      else
         {
           state = 0;
         }
      break;
    case 'm':
      push((int) num);
      result = (state == 2); break;
    case 'H':
      push((int) num);
      if (state == 2 && fifo.count == 2)
         {
           result = ANSI_YX;
         }
      break;
    case 'J':
      result = ((state == 2) && (num == 2) && count == 1);
 
    default:
      state = 0;
 };
 
return result;
}


--- Maximus/2 3.01
 * Origin: Databasen TankBaren, +46-920-257910 (2:201/209)