substr.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_SUBSTR: {
 Value lenv = pop_value(vm);
 Value startv = pop_value(vm);
 Value str = pop_value(vm);
 if (str.type != VAL_STRING || startv.type != VAL_INT || lenv.type != VAL_INT) {
 fprintf(stderr, "Runtime type error: SUBSTR expects (string, int, int)\n");
 exit(1);
 }
 Value out = bi_substr(&str, (int)startv.i, (int)lenv.i);
 free_value(str);
 free_value(startv);
 free_value(lenv);
 push_value(vm, out);
 break;
}