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#include <iostream>
using namespace std;
struct LangEl
{
int key;
const char *name;
};
struct Fsm
{
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 init( );
// 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.
int execute( LangEl *data, 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( );
};
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;
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 , };
int Fsm::init( )
{
{
cs = ( int ) Fsm_start;
}
return 0;
}
int Fsm::execute( LangEl *data, int len )
{
LangEl *p = data;
LangEl *pe = data + len;
LangEl *eof_marker = pe;
{
if ( p == pe )
goto _test_eof;
switch ( cs ) {
case 1:
goto st_case_1;
case 0:
goto st_case_0;
case 2:
goto st_case_2;
case 3:
goto st_case_3;
}
goto st_out;
st_case_1:
if ( (p->key) == 1 )
{
goto ctr0;
}
{
goto st0;
}
st_case_0:
st0:
cs = 0;
goto _out;
ctr0:
{
cout << p->name << endl;
}
goto st2;
st2:
p+= 1;
if ( p == pe )
goto _test_eof2;
st_case_2:
switch ( (p->key) ) {
case 2:
{
goto ctr0;
}
case 3:
{
goto ctr2;
}
}
{
goto st0;
}
ctr2:
{
cout << p->name << endl;
}
goto st3;
st3:
p+= 1;
if ( p == pe )
goto _test_eof3;
st_case_3:
{
goto st0;
}
st_out:
_test_eof2: cs = 2;
goto _test_eof;
_test_eof3: cs = 3;
goto _test_eof;
_test_eof: {}
if ( p == (eof_marker) )
{
switch ( cs ) {
case 3:
{
cout << "accept" << endl;
}
break;
}
}
_out: {}
}
if ( cs == Fsm_error )
return -1;
if ( cs >= Fsm_first_final )
return 1;
return 0;
}
int Fsm::finish( )
{
if ( cs == Fsm_error )
return -1;
if ( cs >= Fsm_first_final )
return 1;
return 0;
}
int main( )
{
static Fsm fsm;
static LangEl lel[] = {
{1, "one"},
{2, "two-a"},
{2, "two-b"},
{2, "two-c"},
{3, "three"}
};
fsm.init();
fsm.execute( lel, 5 );
fsm.finish();
return 0;
}
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