1 // SPDX-License-Identifier: GPL-2.0
21  * seq_buf_can_fit - can the new data fit in the current buffer?
30 	return s->len + len <= s->size;  in seq_buf_can_fit()
34  * seq_buf_print_seq - move the contents of seq_buf into a seq_file
44 	return seq_write(m, s->buffer, len);  in seq_buf_print_seq()
48  * seq_buf_vprintf - sequence printing of information.
50  * @fmt: printf format string
55  * Returns zero on success, -1 on overflow.
61 	WARN_ON(s->size == 0);  in seq_buf_vprintf()
63 	if (s->len < s->size) {  in seq_buf_vprintf()
64 		len = vsnprintf(s->buffer + s->len, s->size - s->len, fmt, args);  in seq_buf_vprintf()
65 		if (s->len + len < s->size) {  in seq_buf_vprintf()
66 			s->len += len;  in seq_buf_vprintf()
71 	return -1;  in seq_buf_vprintf()
75  * seq_buf_printf - sequence printing of information
77  * @fmt: printf format string
81  * Returns zero on success, -1 on overflow.
97  * seq_buf_do_printk - printk seq_buf line by line
101  * printk()-s a multi-line sequential buffer line by line. The function
103  * as a string.
109 	if (s->size == 0 || s->len == 0)  in seq_buf_do_printk()
114 	start = s->buffer;  in seq_buf_do_printk()
116 		int len = lf - start + 1;  in seq_buf_do_printk()
123 	if (start < s->buffer + s->len)  in seq_buf_do_printk()
130  * seq_buf_bprintf - Write the printf string from binary arguments
132  * @fmt: The format string for the @binary arguments
139  * word array that is defined by the format string constraints.
142  * the conversion into the ASCII string within the buffer.
144  * Returns zero on success, -1 on overflow.
151 	WARN_ON(s->size == 0);  in seq_buf_bprintf()
153 	if (s->len < s->size) {  in seq_buf_bprintf()
154 		ret = bstr_printf(s->buffer + s->len, len, fmt, binary);  in seq_buf_bprintf()
155 		if (s->len + ret < s->size) {  in seq_buf_bprintf()
156 			s->len += ret;  in seq_buf_bprintf()
161 	return -1;  in seq_buf_bprintf()
166  * seq_buf_puts - sequence printing of simple string
168  * @str: simple string to record
170  * Copy a simple string into the sequence buffer.
172  * Returns zero on success, -1 on overflow
178 	WARN_ON(s->size == 0);  in seq_buf_puts()
184 		memcpy(s->buffer + s->len, str, len);  in seq_buf_puts()
186 		s->len += len - 1;  in seq_buf_puts()
190 	return -1;  in seq_buf_puts()
194  * seq_buf_putc - sequence printing of simple character
200  * Returns zero on success, -1 on overflow
204 	WARN_ON(s->size == 0);  in seq_buf_putc()
207 		s->buffer[s->len++] = c;  in seq_buf_putc()
211 	return -1;  in seq_buf_putc()
215  * seq_buf_putmem - write raw data into the sequenc buffer
224  * Returns zero on success, -1 on overflow
228 	WARN_ON(s->size == 0);  in seq_buf_putmem()
231 		memcpy(s->buffer + s->len, mem, len);  in seq_buf_putmem()
232 		s->len += len;  in seq_buf_putmem()
236 	return -1;  in seq_buf_putmem()
243  * seq_buf_putmem_hex - write raw memory into the buffer in ASCII hex
252  * Returns zero on success, -1 on overflow
262 	WARN_ON(s->size == 0);
271 		for (i = start_len-1, j = 0; i >= 0; i--) {
279 		/* j increments twice per loop */
284 			return -1;
286 		len -= start_len;
293  * seq_buf_path - copy a path into the sequence buffer
300  * Returns the number of written bytes on success, -1 on overflow
306 	int res = -1;
308 	WARN_ON(s->size == 0);
315 				res = end - buf;
324  * seq_buf_to_user - copy the sequence buffer to user space
330  * by @ubuf. It starts from the last read position (@s->readpos)
332  * the content in the buffer (@s->len), which ever comes first.
337  * On failure it returns -EBUSY if all of the content in the
339  * sequence (@s->len == @s->readpos).
341  * Returns -EFAULT if the copy to userspace fails.
353 	if (len <= s->readpos)
354 		return -EBUSY;
356 	len -= s->readpos;
359 	ret = copy_to_user(ubuf, s->buffer + s->readpos, cnt);
361 		return -EFAULT;
363 	cnt -= ret;
365 	s->readpos += cnt;
370  * seq_buf_hex_dump - print formatted hex dump into the sequence buffer
372  * @prefix_str: string to prefix each line with;
376  * @rowsize: number of bytes to print per line; must be 16 or 32
385  * 32 * 3 - maximum bytes per line, each printed into 2 chars + 1 for
387  * 2 - spaces separating hex dump and ascii representation
388  * 32 - ascii representation
389  * 1 - terminating '\0'
391  * Returns zero on success, -1 on overflow
407 		remaining -= rowsize;