echo.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
 */


/* Implements OP_ECHO: print top-of-stack value without trailing newline. */

case OP_ECHO: {
 Value v = pop_value(vm);
 Value snap = deep_copy_value(&v);
 free_value(v);
 if (vm->output_count < OUTPUT_SIZE) {
 int idx = vm->output_count;
 vm->output[idx] = snap;
 vm->output_is_partial[idx] = 1; // ECHO does not end the line
 vm->output_count++;
 } else {
 free_value(snap);
 fprintf(stderr, "Runtime error: output buffer overflow\n");
 exit(1);
 }
 break;
}