1 /*
2 * Copyright (c) 2025-2026 The FreeBSD Foundation
3 * Copyright (c) 2025-2026 Jean-Sébastien Pédron <dumbbell@FreeBSD.org>
4 *
5 * This software was developed by Jean-Sébastien Pédron under sponsorship
6 * from the FreeBSD Foundation.
7 *
8 * SPDX-License-Identifier: BSD-2-Clause
9 */
10
11 #include <linux/seq_buf.h>
12
13 void
linuxkpi_seq_buf_init(struct seq_buf * s,char * buf,unsigned int size)14 linuxkpi_seq_buf_init(struct seq_buf *s, char *buf, unsigned int size)
15 {
16 s->buffer = buf;
17 s->size = size;
18
19 seq_buf_clear(s);
20 }
21
22 int
linuxkpi_seq_buf_printf(struct seq_buf * s,const char * fmt,...)23 linuxkpi_seq_buf_printf(struct seq_buf *s, const char *fmt, ...)
24 {
25 int ret;
26 va_list args;
27
28 va_start(args, fmt);
29 ret = seq_buf_vprintf(s, fmt, args);
30 va_end(args);
31
32 return (ret);
33 }
34
35 int
linuxkpi_seq_buf_vprintf(struct seq_buf * s,const char * fmt,va_list args)36 linuxkpi_seq_buf_vprintf(struct seq_buf *s, const char *fmt, va_list args)
37 {
38 int ret;
39
40 if (!seq_buf_has_overflowed(s)) {
41 ret = vsnprintf(s->buffer + s->len, s->size - s->len, fmt, args);
42 if (s->len + ret < s->size) {
43 s->len += ret;
44 return (0);
45 }
46 }
47
48 seq_buf_set_overflow(s);
49 return (-1);
50 }
51
52 const char *
linuxkpi_seq_buf_str(struct seq_buf * s)53 linuxkpi_seq_buf_str(struct seq_buf *s)
54 {
55 if (s->size == 0)
56 return ("");
57
58 if (seq_buf_buffer_left(s))
59 s->buffer[s->len] = '\0';
60 else
61 s->buffer[s->size - 1] = '\0';
62
63 return (s->buffer);
64 }
65