/*
 * Copyright (c) 2026 Nakidai Perumenei <nakidai at disroot dot org>
 *
 * 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 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 "ircd.h"

#include <stdarg.h>
#include <stdio.h>
#include <string.h>

#include <unistd.h>


static char buf[MESSAGE_MAX + 1];
static int written;

static void
vstoref(const char *fmt, va_list ap)
{
	written = vsnprintf(buf, sizeof(buf) - 2, fmt, ap);
	written = written < sizeof(buf) - 2 ? written : sizeof(buf) - 2;
	memcpy(buf + written, "\r\n", 2);
	written += 2;
}

int
writef(int fd, const char *fmt, ...)
{
	va_list args;

	va_start(args, fmt);
	vstoref(fmt, args);
	va_end(args);

	return write(fd, buf, written);
}

int
writechanf(const struct Peer *except, const struct Channel *channel, const char *fmt, ...)
{
	va_list args;
	int count;
	size_t i;

	va_start(args, fmt);
	vstoref(fmt, args);
	va_end(args);

	count = 0;
	for (i = 0; i < channel->users_c; ++i)
		if (!except || channel->users[i]->fd != except->fd)
			count += write(channel->users[i]->fd, buf, written) == written;

	return count;
}