random_int.c

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/*
 * This file is part of the Fun programming language.
 * https://fun-lang.xyz/
 *
 * Copyright 2025 Johannes Findeisen <you@hanez.org>
 * Licensed under the terms of the Apache-2.0 license.
 * https://opensource.org/license/apache-2-0
 */


case OP_RANDOM_INT: {
 Value hi = pop_value(vm);
 Value lo = pop_value(vm);
 if (lo.type != VAL_INT || hi.type != VAL_INT) {
 fprintf(stderr, "RANDOM_INT expects (int, int)\n");
 exit(1);
 }
 int64_t a = lo.i, b = hi.i;
 if (b <= a) {
 push_value(vm, make_int((int64_t)a));
 free_value(lo);
 free_value(hi);
 break;
 }
 int64_t span = b - a;
 int64_t r = (int64_t)(rand() % (span));
 push_value(vm, make_int(a + r));
 free_value(lo);
 free_value(hi);
 break;
}