1  
       2  extern int foo (void);
       3  
       4  int
       5  avi_parse_comments (int fd, char *buf, int space_left)
       6  {
       7    int len = 0, readlen = 0, k;
       8    char *data, *c, *d;
       9  
      10    if (fd <= 0 || !buf || space_left <= 0)
      11      return -1;
      12  
      13    memset (buf, 0, space_left);
      14  
      15    readlen = foo ();
      16    if (!(data = malloc (readlen * sizeof (char) + 1)))
      17      return -1;
      18  
      19    c = data;
      20    space_left--;
      21  
      22    while (len < space_left)
      23      {
      24        if (!c || *c == '\0')
      25  	break;
      26        else if (*c == 'I')
      27  	{
      28  	  d = c + 4;
      29  
      30  	  k = 0;
      31  	  while (d[k] != '\r' && d[k] != '\n' && d[k] != '\0')
      32  	    ++k;
      33  	  if (k >= space_left)
      34  	    return len;
      35  
      36  
      37  	  memcpy (buf + len, c, 4);
      38  	  len += 4;
      39  
      40  
      41  	  long2str (buf + len, k + 1);
      42  	  len += 4;
      43  
      44  
      45  	  memcpy (buf + len, d, k);
      46  
      47  	  *(buf + len + k + 1) = '\0';
      48  
      49  
      50  	  if ((k + 1) & 1)
      51  	    {
      52  	      k++;
      53  	      *(buf + len + k + 1) = '\0';
      54  	    }
      55  	  len += k + 1;
      56  
      57  
      58  	  while (*c != '\n' && *c != '\0')
      59  	    ++c;
      60  	  if (*c != '\0')
      61  	    ++c;
      62  	  else
      63  	    break;
      64  
      65  	}
      66      }
      67    free (data);
      68  
      69    return len;
      70  }
      71  
      72