int
sc_ftruncate(thread_t *t, syscall_result_t *r, ftruncate_args_t *args)
{
file_t *f = f_get(t->thr_proc->p_fd, args->fd);
if(!f)
return -EBADF;
f_truncate(f, args->length);
frele(f);
return -EOK;
}
errno_t
sc_lseek(thread_t *p, syscall_result_t *r, lseek_args *args)
{
file_t *f = f_get(p->thr_proc->p_fd, args->fd);
if (!f)
return -EBADF;
int res = f_seek(f, args->offset, args->whence);
frele(f);
if(res < 0)
return res;
r->result = res;
return -EOK;
}
errno_t
sc_close(thread_t *t, syscall_result_t *r, close_args *args)
{
file_t *f = f_get(t->thr_proc->p_fd, args->fd);
if ( f == NULL )
return -EBADF;
r->result = 0;
f_set(t->thr_proc->p_fd, NULL, args->fd, FALSE);
f_close(f); //close pozbywa się referencji -> dalsze odwoływanie się do niej
// jest błędem
return 0;
}
errno_t
sc_ioctl(thread_t *t, syscall_result_t *r, sc_ioctl_args *args)
{
file_t *file = f_get(t->thr_proc->p_fd, args->fd);
if (file == NULL) {
return -EBADF;
}
int res = f_ioctl(file, args->cmd, args->arg);
frele(file);
if(res < 0)
return res;
r->result = res;
return -EOK;
}
errno_t
sc_isatty(thread_t *t, syscall_result_t *r, sc_isatty_args *args)
{
r->result = 0;
file_t *file = f_get(t->thr_proc->p_fd, args->fd);
if (file == NULL) {
return -EBADF;
}
if(!vnode_isatty(file->f_vnode)) {
frele(file);
return -ENOTTY;
}
frele(file);
r->result = 1;
return -EOK;
}
const exprt qbf_squolem_coret::f_get_dnf(WitnessStack *wsp)
{
Clause *p=wsp->posWits;
if(!p) return exprt(ID_false, typet(ID_bool));
exprt::operandst operands;
while(p!=NULL)
{
exprt cube=and_exprt();
for(unsigned i=0; i<p->size; i++)
{
const Literal &lit=p->literals[i];
exprt subf = f_get(literalt(var(lit), !isPositive(lit)));
if(find(cube.operands().begin(), cube.operands().end(), subf)==
cube.operands().end())
cube.move_to_operands(subf);
simplify_extractbits(cube);
}
if(cube.operands().empty())
cube=true_exprt();
else if(cube.operands().size()==1)
{
const exprt tmp=cube.op0();
cube=tmp;
}
#if 0
std::cout << "CUBE: " << cube << std::endl;
#endif
operands.push_back(cube);
p=p->next;
}
return or_exprt(operands);
}
const exprt qbf_squolem_coret::f_get_cnf(WitnessStack *wsp)
{
Clause *p=wsp->negWits;
if(!p) return exprt(ID_true, typet(ID_bool));
exprt::operandst operands;
while(p!=NULL)
{
exprt clause=or_exprt();
for(unsigned i=0; i<p->size; i++)
{
const Literal &lit=p->literals[i];
exprt subf = f_get(literalt(var(lit), isPositive(lit))); // negated!
if(find(clause.operands().begin(), clause.operands().end(), subf)==
clause.operands().end())
clause.move_to_operands(subf);
}
if(clause.operands().empty())
clause=false_exprt();
else if(clause.operands().size()==1)
{
const exprt tmp=clause.op0();
clause=tmp;
}
#if 0
std::cout << "CLAUSE: " << clause << std::endl;
#endif
operands.push_back(clause);
p=p->next;
}
return and_exprt(operands);
}
