trunc.c

Go to the documentation of this file.

/*
 * This file is part of the Fun programming language.
 * https://fun-lang.xyz/
 *
 * Copyright 2026 Johannes Findeisen <you@hanez.org>
 * Licensed under the terms of the Apache-2.0 license.
 * https://opensource.org/license/apache-2-0
 */


#include <math.h>

case OP_TRUNC: {
 Value v = pop_value(vm);
 if (v.type == VAL_INT) {
 push_value(vm, make_int(v.i));
 free_value(v);
 } else if (v.type == VAL_FLOAT) {
 double r = trunc(v.d);
 if (r >= (double)INT64_MIN && r <= (double)INT64_MAX) {
 int64_t ii = (int64_t)r;
 if ((double)ii == r) {
 push_value(vm, make_int(ii));
 } else {
 push_value(vm, make_float(r));
 }
 } else {
 push_value(vm, make_float(r));
 }
 free_value(v);
 } else {
 fprintf(stderr, "Runtime type error: TRUNC expects number, got %s\n", value_type_name(v.type));
 exit(1);
 }
 break;
}