/* $OpenBSD: cmd-set-buffer.c,v 1.37 2026/02/15 17:43:26 nicm Exp $ */

/*
 * Copyright (c) 2007 Nicholas Marriott <nicholas.marriott@gmail.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.
 */

#include <sys/types.h>

#include <stdlib.h>
#include <string.h>

#include "tmux.h"

/*
 * Add, set, append to or delete a paste buffer.
 */

static enum cmd_retval  cmd_set_buffer_exec(struct cmd *, struct cmdq_item *);

const struct cmd_entry cmd_set_buffer_entry = {
        .name = "set-buffer",
        .alias = "setb",

        .args = { "ab:t:n:w", 0, 1, NULL },
        .usage = "[-aw] " CMD_BUFFER_USAGE " [-n new-buffer-name] "
                 CMD_TARGET_CLIENT_USAGE " [data]",

        .flags = CMD_AFTERHOOK|CMD_CLIENT_TFLAG|CMD_CLIENT_CANFAIL,
        .exec = cmd_set_buffer_exec
};

const struct cmd_entry cmd_delete_buffer_entry = {
        .name = "delete-buffer",
        .alias = "deleteb",

        .args = { "b:", 0, 0, NULL },
        .usage = CMD_BUFFER_USAGE,

        .flags = CMD_AFTERHOOK,
        .exec = cmd_set_buffer_exec
};

static enum cmd_retval
cmd_set_buffer_exec(struct cmd *self, struct cmdq_item *item)
{
        struct args             *args = cmd_get_args(self);
        struct client           *tc = cmdq_get_target_client(item);
        struct paste_buffer     *pb = NULL;
        char                    *bufname = NULL, *bufdata = NULL, *cause = NULL;
        const char              *olddata;
        size_t                   bufsize = 0, newsize;

        if (args_get(args, 'b') != NULL) {
                bufname = xstrdup(args_get(args, 'b'));
                pb = paste_get_name(bufname);
        }

        if (cmd_get_entry(self) == &cmd_delete_buffer_entry) {
                if (pb == NULL) {
                        if (bufname != NULL) {
                                cmdq_error(item, "unknown buffer: %s", bufname);
                                goto fail;
                        }
                        pb = paste_get_top(&bufname);
                }
                if (pb == NULL) {
                        cmdq_error(item, "no buffer");
                        goto fail;
                }
                paste_free(pb);
                free(bufname);
                return (CMD_RETURN_NORMAL);
        }

        if (args_has(args, 'n')) {
                if (pb == NULL) {
                        if (bufname != NULL) {
                                cmdq_error(item, "unknown buffer: %s", bufname);
                                goto fail;
                        }
                        pb = paste_get_top(&bufname);
                }
                if (pb == NULL) {
                        cmdq_error(item, "no buffer");
                        goto fail;
                }
                if (paste_rename(bufname, args_get(args, 'n'), &cause) != 0) {
                        cmdq_error(item, "%s", cause);
                        goto fail;
                }
                return (CMD_RETURN_NORMAL);
        }

        if (args_count(args) != 1) {
                cmdq_error(item, "no data specified");
                goto fail;
        }
        if ((newsize = strlen(args_string(args, 0))) == 0)
                return (CMD_RETURN_NORMAL);

        if (args_has(args, 'a') && pb != NULL) {
                olddata = paste_buffer_data(pb, &bufsize);
                bufdata = xmalloc(bufsize);
                memcpy(bufdata, olddata, bufsize);
        }

        bufdata = xrealloc(bufdata, bufsize + newsize);
        memcpy(bufdata + bufsize, args_string(args, 0), newsize);
        bufsize += newsize;

        if (paste_set(bufdata, bufsize, bufname, &cause) != 0) {
                cmdq_error(item, "%s", cause);
                goto fail;
        }
        if (args_has(args, 'w') && tc != NULL)
                tty_set_selection(&tc->tty, "", bufdata, bufsize);

        return (CMD_RETURN_NORMAL);

fail:
        free(bufdata);
        free(bufname);
        free(cause);
        return (CMD_RETURN_ERROR);
}