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index.c
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index.c
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#include <node_api.h>
#include <napi-macros.h>
#include "lib/picosat.h"
NAPI_METHOD(node_picosat_sat) {
NAPI_ARGV(2)
NAPI_ARGV_BUFFER(formula, 0)
NAPI_ARGV_BUFFER(assumptions, 1)
PicoSAT *pico_ptr = picosat_init();
int * formula_int = (int*) formula;
size_t i;
for(i = 0; i < (formula_len / 4); i++) {
picosat_add(pico_ptr, formula_int[i]);
}
int * assumptions_int = (int*) assumptions;
for(i = 0; i < (assumptions_len / 4); i++) {
picosat_assume(pico_ptr, assumptions_int[i]);
}
int status_code = picosat_sat(pico_ptr, -1);
napi_value result_array;
if (status_code == PICOSAT_SATISFIABLE) {
size_t nvars = picosat_variables(pico_ptr);
napi_create_array_with_length(env, nvars + 1, &result_array);
// get and set the variable solutions
size_t i;
for (i = 1; i <= nvars; i++) {
int val = picosat_deref(pico_ptr, i) * i;
napi_value int_val;
napi_create_int32(env, val, &int_val);
napi_set_element(env, result_array, i, int_val);
}
} else {
// returns an array with just the status code as first element
napi_create_array_with_length(env, 1, &result_array);
}
// set the status code as first element of the array
napi_value js_status_code;
napi_create_int32(env, status_code, &js_status_code);
napi_set_element(env, result_array, 0, js_status_code);
picosat_reset(pico_ptr);
return result_array;
}
NAPI_INIT() {
NAPI_EXPORT_FUNCTION(node_picosat_sat)
}