/*

 * Copyright (c) 2026 David Korczynski <david@adalogics.com>

 *

 * Permission to use, copy, modify, and distribute this software for any

 * purpose with or without fee is hereby granted, provided that the above

 * copyright notice and this permission notice appear in all copies.

 *

 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER

 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING

 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

 */

/*

 * Fuzz the tmux format string expander (format_expand).

 *

 * This exercises:

 *   - format.c (format parsing, modifier chains, conditionals, math, regex)

 *   - colour.c (colour name and RGB parsing within formats)

 *   - utf8.c (UTF-8 width calculations in format padding)

 */

#include <stddef.h>

#include <string.h>

#include "tmux.h"

struct event_base *libevent;

int

LLVMFuzzerTestOneInput(const u_char *data, size_t size)

{

  struct format_tree  *ft;

  char      *buf, *expanded;

  if (size > 2048 || size == 0)

    return 0;

  /* Null-terminate the input for format_expand. */

  buf = malloc(size + 1);

  if (buf == NULL)

    return 0;

  memcpy(buf, data, size);

  buf[size] = '\0';

  ft = format_create(NULL, NULL, 0, FORMAT_NOJOBS);

  format_add(ft, "session_name", "%s", "fuzz-session");

  format_add(ft, "window_index", "%d", 0);

  format_add(ft, "window_name", "%s", "fuzz-window");

  format_add(ft, "pane_index", "%d", 0);

  format_add(ft, "pane_id", "%s", "%%0");

  format_add(ft, "host", "%s", "fuzzhost");

  format_add(ft, "pane_width", "%d", 80);

  format_add(ft, "pane_height", "%d", 25);

  expanded = format_expand(ft, buf);

  free(expanded);

  format_free(ft);

  free(buf);

  return 0;

}

int

LLVMFuzzerInitialize(__unused int *argc, __unused char ***argv)

{

  const struct options_table_entry  *oe;

  global_environ = environ_create();

  global_options = options_create(NULL);

  global_s_options = options_create(NULL);

  global_w_options = options_create(NULL);

  for (oe = options_table; oe->name != NULL; oe++) {

    if (oe->scope & OPTIONS_TABLE_SERVER)

      options_default(global_options, oe);

    if (oe->scope & OPTIONS_TABLE_SESSION)

      options_default(global_s_options, oe);

    if (oe->scope & OPTIONS_TABLE_WINDOW)

      options_default(global_w_options, oe);

  }

  libevent = osdep_event_init();

  socket_path = xstrdup("dummy");

  return 0;

}