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/* See LICENSE file for copyright and license details. */
#include "common.h"
#ifndef TEST
int
(libnormalform_literal_cmp__)(struct expression *a, struct expression *b)
{
int a_class, b_class;
uintptr_t a_value, b_value;
beginning:
switch (a->type) {
case LIBNORMALFORM_VARIABLE:
case LIBNORMALFORM_NEGATED_VARIABLE:
a_class = 0;
break;
case LIBNORMALFORM_TRANSFORMATION:
case LIBNORMALFORM_FUNCTION:
case LIBNORMALFORM_NEGATED_FUNCTION:
a_class = 1;
break;
case LIBNORMALFORM_FOR_ALL:
case LIBNORMALFORM_NEGATED_FOR_ALL:
case LIBNORMALFORM_FOR_ANY:
case LIBNORMALFORM_NEGATED_FOR_ANY:
a_class = 2;
break;
case LIBNORMALFORM_FOR_ONE:
case LIBNORMALFORM_NEGATED_FOR_ONE:
a_class = 3;
break;
default:
case LIBNORMALFORM_CONJUNCTION:
case LIBNORMALFORM_DISJUNCTION:
case LIBNORMALFORM_EXCLUSIVE_DISJUNCTION:
abort();
}
switch (b->type) {
case LIBNORMALFORM_VARIABLE:
case LIBNORMALFORM_NEGATED_VARIABLE:
b_class = 0;
break;
case LIBNORMALFORM_TRANSFORMATION:
case LIBNORMALFORM_FUNCTION:
case LIBNORMALFORM_NEGATED_FUNCTION:
b_class = 1;
break;
case LIBNORMALFORM_FOR_ALL:
case LIBNORMALFORM_NEGATED_FOR_ALL:
case LIBNORMALFORM_FOR_ANY:
case LIBNORMALFORM_NEGATED_FOR_ANY:
b_class = 2;
break;
case LIBNORMALFORM_FOR_ONE:
case LIBNORMALFORM_NEGATED_FOR_ONE:
b_class = 3;
break;
default:
case LIBNORMALFORM_CONJUNCTION:
case LIBNORMALFORM_DISJUNCTION:
case LIBNORMALFORM_EXCLUSIVE_DISJUNCTION:
abort();
}
if (a_class != b_class)
return a_class < b_class ? -2 : +2;
a_value = (uintptr_t)a->user_item;
b_value = (uintptr_t)b->user_item;
if (a_value != b_value)
return a_value < b_value ? -2 : +2;
switch (a->type) {
case LIBNORMALFORM_VARIABLE:
return -(b->type == LIBNORMALFORM_NEGATED_VARIABLE);
case LIBNORMALFORM_NEGATED_VARIABLE:
return +(b->type == LIBNORMALFORM_VARIABLE);
case LIBNORMALFORM_TRANSFORMATION:
a = a->terms[0];
b = b->terms[0];
goto beginning;
case LIBNORMALFORM_FUNCTION:
return -(b->type == LIBNORMALFORM_NEGATED_FUNCTION);
case LIBNORMALFORM_NEGATED_FUNCTION:
return +(b->type == LIBNORMALFORM_FUNCTION);
case LIBNORMALFORM_FOR_ALL:
case LIBNORMALFORM_NEGATED_FOR_ALL:
case LIBNORMALFORM_FOR_ANY:
case LIBNORMALFORM_NEGATED_FOR_ANY:
/* TODO (not) all/any */
return 0;
case LIBNORMALFORM_FOR_ONE:
case LIBNORMALFORM_NEGATED_FOR_ONE:
/* TODO (not) one */
return 0;
default:
case LIBNORMALFORM_CONJUNCTION:
case LIBNORMALFORM_DISJUNCTION:
case LIBNORMALFORM_EXCLUSIVE_DISJUNCTION:
abort();
}
}
#else
TODO_TEST
#endif
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