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/* $Id: c-example.c,v 1.1 2015/01/24 17:32:17 sarrazip Exp $
C BoolStuff example program.
Written by Pierre Sarrazin <http://sarrazip.com/>
This file is in the public domain.
*/
#include <boolstuff/c-api.h>
#include <assert.h>
#include <stdlib.h>
static void print_variable_names(char *names[])
{
size_t i;
for (i = 0; names[i] != NULL; ++i)
printf("%s ", names[i]);
}
int main()
{
char line[512];
while (fgets(line, sizeof(line), stdin) != NULL)
{
boolexpr_t expr, dnf;
size_t errorIndex;
enum bool_error_t errorCode;
expr = boolstuff_parse(line, &errorIndex, &errorCode);
if (expr == NULL)
{
printf("Error #%d at character #%u\n\n", errorCode, (unsigned) errorIndex);
continue;
}
printf("Original expression : ");
boolstuff_print_tree(stdout, expr);
printf("\n");
dnf = boolstuff_get_disjunctive_normal_form(expr);
/* NOTE: 'expr' is now unusable.
The original tree has been transformed by the preceding call.
*/
expr = NULL;
printf("Disjunctive normal form : ");
if (dnf != NULL)
boolstuff_print_tree(stdout, dnf);
else
printf("FALSE");
printf("\n");
if (dnf != NULL)
{
size_t numRoots, i;
boolexpr_t *treeRoots; /* array */
treeRoots = boolstuff_get_dnf_term_roots(dnf, &numRoots);
for (i = 0; i < numRoots; ++i)
{
boolexpr_t term;
char **positivesArray, **negativesArray;
term = treeRoots[i];
boolstuff_get_tree_variables(term, &positivesArray, &negativesArray);
printf("Term : ");
boolstuff_print_tree(stdout, term);
printf("\n");
printf("Positives: ");
print_variable_names(positivesArray);
printf("\n");
printf("Negatives: ");
print_variable_names(negativesArray);
printf("\n");
boolstuff_free_variables_sets(positivesArray, negativesArray);
}
boolstuff_free_node_array(treeRoots);
}
printf("\n");
boolstuff_destroy_tree(dnf);
/* Note that we do not destroy 'expr', because it was implicitly
destroyed by the call to boolstuff_get_disjunctive_normal_form().
*/
}
return EXIT_SUCCESS;
}
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