/*
 * Copyright (c) 2025-2026 The FreeBSD Foundation
 * Copyright (c) 2025-2026 Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
 *
 * This software was developed by Jean-Sébastien Pédron under sponsorship
 * from the FreeBSD Foundation.
 *
 * SPDX-License-Identifier: BSD-2-Clause
 */

#include <linux/seq_buf.h>
 
void
linuxkpi_seq_buf_init(struct seq_buf *s, char *buf, unsigned int size)
{
        s->buffer = buf;
        s->size = size;

        seq_buf_clear(s);
}
 
int
linuxkpi_seq_buf_printf(struct seq_buf *s, const char *fmt, ...)
{
        int ret;
        va_list args;

        va_start(args, fmt);
        ret = seq_buf_vprintf(s, fmt, args);
        va_end(args);

        return (ret);
}
 
int
linuxkpi_seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args)
{
        int ret;

        if (!seq_buf_has_overflowed(s)) {
                ret = vsnprintf(s->buffer + s->len, s->size - s->len, fmt, args);
                if (s->len + ret < s->size) {
                        s->len += ret;
                        return (0);
                }
        }

        seq_buf_set_overflow(s);
        return (-1);
}

const char *
linuxkpi_seq_buf_str(struct seq_buf *s)
{
        if (s->size == 0)
                return ("");

        if (seq_buf_buffer_left(s))
                s->buffer[s->len] = '\0';
        else
                s->buffer[s->size - 1] = '\0';

        return (s->buffer);
}