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#include <stdio.h>
#include <objc/Object.h>
#include <Foundation/Foundation.h>
@interface Fsm : NSObject
{
@public
int cs;
};
// Initialize the machine. Invokes any init statement blocks. Returns 0
// if the machine begins in a non-accepting state and 1 if the machine
// begins in an accepting state.
- (int) initFsm;
// Execute the machine on a block of data. Returns -1 if after processing
// the data, the machine is in the error state and can never accept, 0 if
// the machine is in a non-accepting state and 1 if the machine is in an
// accepting state.
- (void) executeWithData:(const unsigned char *)data len:(int)len;
// Indicate that there is no more data. Returns -1 if the machine finishes
// in the error state and does not accept, 0 if the machine finishes
// in any other non-accepting state and 1 if the machine finishes in an
// accepting state.
- (int) finish;
@end
@implementation Fsm
static const char _Fsm_actions [] = { 0, 1, 0, 0 , };
static const unsigned char _Fsm_trans_keys [] = { 1u, 0u, 2u, 2u, 0u, 0u, 1u, 0u, 0u, };
static const char _Fsm_char_class [] = { 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 0 , };
static const char _Fsm_index_offsets [] = { 0, 0, 1, 2, 0 , };
static const char _Fsm_indicies [] = { 0, 2, 0 , };
static const char _Fsm_index_defaults [] = { 0, 1, 1, 1, 0 , };
static const char _Fsm_trans_cond_spaces [] = { -1, -1, -1, 0 , };
static const char _Fsm_cond_targs [] = { 2, 0, 3, 0 , };
static const char _Fsm_cond_actions [] = { 1, 0, 0, 0 , };
static const char _Fsm_nfa_targs [] = { 0, 0 , };
static const char _Fsm_nfa_offsets [] = { 0, 0, 0, 0, 0 , };
static const char _Fsm_nfa_push_actions [] = { 0, 0 , };
static const char _Fsm_nfa_pop_trans [] = { 0, 0 , };
static const int Fsm_start = 1;
static const int Fsm_first_final = 3;
static const int Fsm_error = 0;
static const int Fsm_en_main = 1;
- (int) initFsm;
{
{
cs = ( int ) Fsm_start;
}
return 1;
}
- (void) executeWithData:(const unsigned char *)_data len:(int)_len;
{
const unsigned char *p = _data;
const unsigned char *pe = _data + _len;
{
unsigned int _trans = 0;
unsigned int _have = 0;
unsigned int _cont = 1;
const char *_acts;
unsigned int _nacts;
const unsigned char *_keys;
const char *_inds;
while ( _cont == 1 )
{
if ( cs == 0 )
_cont = 0;
_have = 0;
if ( p == pe )
{
if ( _have == 0 )
_cont = 0;
}
if ( _cont == 1 )
{
if ( _have == 0 )
{
_keys = _Fsm_trans_keys + (cs<<1);
_inds = _Fsm_indicies + _Fsm_index_offsets[cs];
if ( ((*( p ))
)<= 232 && ((*( p ))
)>= 10 )
{
int _ic = ( int ) _Fsm_char_class[( int ) ((*( p ))
)- 10];
if ( _ic <= ( int ) (*( _keys+1 ))
&& _ic >= ( int ) (*( _keys ))
)
_trans = ( unsigned int ) (*( _inds + ( int ) (_ic - ( int ) (*( _keys ))
) ))
;
else
_trans = ( unsigned int ) _Fsm_index_defaults[cs];
}
else
{
_trans = ( unsigned int ) _Fsm_index_defaults[cs];
}
}
if ( _cont == 1 )
{
cs = ( int ) _Fsm_cond_targs[_trans];
if ( _Fsm_cond_actions[_trans]!= 0 )
{
_acts = _Fsm_actions + _Fsm_cond_actions[_trans];
_nacts = ( unsigned int ) (*( _acts ))
;
_acts += 1;
while ( _nacts > 0 )
{
switch ( (*( _acts ))
) {
case 0 :
{
printf("yes\n");
}
break;
}
_nacts -= 1;
_acts += 1;
}
}
if ( cs == 0 )
_cont = 0;
if ( _cont == 1 )
p += 1;
}
}
}
}
}
- (int) finish;
{
if ( cs == Fsm_error )
return -1;
else if ( cs >= Fsm_first_final )
return 1;
return 0;
}
@end
#define BUFSIZE 2048
Fsm *fsm;
unsigned char buf[BUFSIZE];
void test( unsigned char *buf, int len )
{
fsm = [[Fsm alloc] init];
[fsm initFsm];
[fsm executeWithData:buf len:len];
if ( [fsm finish] > 0 )
printf("ACCEPT\n");
else
printf("FAIL\n");
}
unsigned char data1[] = { 0xe8, 10 };
unsigned char data2[] = { 0xf8, 10 };
int main()
{
test( data1, 2 );
test( data2, 2 );
return 0;
}
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