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.
98  * seq_buf_bprintf - Write the printf string from binary arguments
100  * @fmt: The format string for the @binary arguments
107  * word array that is defined by the format string constraints.
110  * the conversion into the ASCII string within the buffer.
112  * Returns zero on success, -1 on overflow.
119 	WARN_ON(s->size == 0);  in seq_buf_bprintf()
121 	if (s->len < s->size) {  in seq_buf_bprintf()
122 		ret = bstr_printf(s->buffer + s->len, len, fmt, binary);  in seq_buf_bprintf()
123 		if (s->len + ret < s->size) {  in seq_buf_bprintf()
124 			s->len += ret;  in seq_buf_bprintf()
129 	return -1;  in seq_buf_bprintf()
134  * seq_buf_puts - sequence printing of simple string
136  * @str: simple string to record
138  * Copy a simple string into the sequence buffer.
140  * Returns zero on success, -1 on overflow
146 	WARN_ON(s->size == 0);  in seq_buf_puts()
152 		memcpy(s->buffer + s->len, str, len);  in seq_buf_puts()
154 		s->len += len - 1;  in seq_buf_puts()
158 	return -1;  in seq_buf_puts()
162  * seq_buf_putc - sequence printing of simple character
168  * Returns zero on success, -1 on overflow
172 	WARN_ON(s->size == 0);  in seq_buf_putc()
175 		s->buffer[s->len++] = c;  in seq_buf_putc()
179 	return -1;  in seq_buf_putc()
183  * seq_buf_putmem - write raw data into the sequenc buffer
192  * Returns zero on success, -1 on overflow
196 	WARN_ON(s->size == 0);  in seq_buf_putmem()
199 		memcpy(s->buffer + s->len, mem, len);  in seq_buf_putmem()
200 		s->len += len;  in seq_buf_putmem()
204 	return -1;  in seq_buf_putmem()
211  * seq_buf_putmem_hex - write raw memory into the buffer in ASCII hex
220  * Returns zero on success, -1 on overflow
230 	WARN_ON(s->size == 0);
233 		start_len = min(len, HEX_CHARS - 1);
237 		for (i = start_len-1, j = 0; i >= 0; i--) {
245 		/* j increments twice per loop */
246 		len -= j / 2;
251 			return -1;
257  * seq_buf_path - copy a path into the sequence buffer
264  * Returns the number of written bytes on success, -1 on overflow
270 	int res = -1;
272 	WARN_ON(s->size == 0);
279 				res = end - buf;
288  * seq_buf_to_user - copy the squence buffer to user space
294  * by @ubuf. It starts from the last read position (@s->readpos)
296  * the content in the buffer (@s->len), which ever comes first.
301  * On failure it returns -EBUSY if all of the content in the
303  * sequence (@s->len == @s->readpos).
305  * Returns -EFAULT if the copy to userspace fails.
317 	if (len <= s->readpos)
318 		return -EBUSY;
320 	len -= s->readpos;
323 	ret = copy_to_user(ubuf, s->buffer + s->readpos, cnt);
325 		return -EFAULT;
327 	cnt -= ret;
329 	s->readpos += cnt;
334  * seq_buf_hex_dump - print formatted hex dump into the sequence buffer
336  * @prefix_str: string to prefix each line with;
340  * @rowsize: number of bytes to print per line; must be 16 or 32
349  * 32 * 3 - maximum bytes per line, each printed into 2 chars + 1 for
351  * 2 - spaces separating hex dump and ascii representation
352  * 32 - ascii representation
353  * 1 - terminating '\0'
355  * Returns zero on success, -1 on overflow
371 		remaining -= rowsize;