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#include <stdlib.h>
#include "eval.h"
#include "stdio.h"
#include "parse.h"
char just_is_sound(prop_t prop, just_t just, lineSet_t lines) {
prop_t a, b, w, x, y, z;
switch (just.rule) {
case PREMISE_R:
return 1;
case ASSUMPTION_R:
return 1;
case CONJUNCT_INTRO:
a = *prop.propA;
b = *prop.propB;
w = lines.lines[just.references[0] - 1].proposition;
x = lines.lines[just.references[1] - 1].proposition;
return (peq(a, w) && peq(b, x)) || (peq(a, x) && peq(b, w));
case DISJUNCT_INTRO:
a = *prop.propA;
b = *prop.propB;
w = lines.lines[just.references[0] - 1].proposition;
return peq(a, w) || peq(b, w);
case IMPLICATION_INTRO:
a = *prop.propA;
b = *prop.propB;
w = lines.lines[just.references[0] - 1].proposition;
x = lines.lines[just.references[1] - 1].proposition;
if ((peq(a, w) && peq(b, x)) || (peq(a, x) && peq(b, w))) {
return 1;
}
return 0;
case CONJUNCT_ELIM:
w = lines.lines[just.references[0] - 1].proposition;
return peq(prop, *w.propA) || peq(prop, *w.propB);
default:
return 0;
}
}
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