fs/bcachefs/printbuf.c

13 static inline unsigned printbuf_linelen(struct printbuf *buf)
15 	return buf->pos - buf->last_newline;
21 	char *buf;
38 	buf = krealloc(out->buf, new_size, !out->atomic ? GFP_KERNEL : GFP_NOWAIT);
40 	if (!buf) {
45 	out->buf	= buf;
58 		len = vsnprintf(out->buf + out->pos, printbuf_remaining(out), fmt, args2);
75 		len = vsnprintf(out->buf + out->pos, printbuf_remaining(out), fmt, args);
86  * bch2_printbuf_str() - returns printbuf's buf as a C string, guaranteed to be
88  * @buf:	printbuf to terminate
91 const char *bch2_printbuf_str(const struct printbuf *buf)
98 	return buf->pos
99 		? buf->buf
106  * @buf:	printbuf to exit
108 void bch2_printbuf_exit(struct printbuf *buf)
110 	if (buf->heap_allocated) {
111 		kfree(buf->buf);
112 		buf->buf = ERR_PTR(-EINTR); /* poison value */
116 void bch2_printbuf_tabstops_reset(struct printbuf *buf)
118 	buf->nr_tabstops = 0;
121 void bch2_printbuf_tabstop_pop(struct printbuf *buf)
123 	if (buf->nr_tabstops)
124 		--buf->nr_tabstops;
130  * @buf: printbuf to control
137 int bch2_printbuf_tabstop_push(struct printbuf *buf, unsigned spaces)
139 	unsigned prev_tabstop = buf->nr_tabstops
140 		? buf->_tabstops[buf->nr_tabstops - 1]
143 	if (WARN_ON(buf->nr_tabstops >= ARRAY_SIZE(buf->_tabstops)))
146 	buf->_tabstops[buf->nr_tabstops++] = prev_tabstop + spaces;
147 	buf->has_indent_or_tabstops = true;
154  * @buf: printbuf to control
160 void bch2_printbuf_indent_add(struct printbuf *buf, unsigned spaces)
162 	if (WARN_ON_ONCE(buf->indent + spaces < buf->indent))
165 	buf->indent += spaces;
166 	prt_chars(buf, ' ', spaces);
168 	buf->has_indent_or_tabstops = true;
174  * @buf: printbuf to control
180 void bch2_printbuf_indent_sub(struct printbuf *buf, unsigned spaces)
182 	if (WARN_ON_ONCE(spaces > buf->indent))
183 		spaces = buf->indent;
185 	if (buf->last_newline + buf->indent == buf->pos) {
186 		buf->pos -= spaces;
187 		printbuf_nul_terminate(buf);
189 	buf->indent -= spaces;
191 	if (!buf->indent && !buf->nr_tabstops)
192 		buf->has_indent_or_tabstops = false;
195 void bch2_prt_newline(struct printbuf *buf)
199 	bch2_printbuf_make_room(buf, 1 + buf->indent);
201 	__prt_char(buf, '\n');
203 	buf->last_newline	= buf->pos;
205 	for (i = 0; i < buf->indent; i++)
206 		__prt_char(buf, ' ');
208 	printbuf_nul_terminate(buf);
210 	buf->last_field		= buf->pos;
211 	buf->cur_tabstop	= 0;
217 static inline unsigned cur_tabstop(struct printbuf *buf)
219 	return buf->cur_tabstop < buf->nr_tabstops
220 		? buf->_tabstops[buf->cur_tabstop]
248 static void __prt_tab_rjust(struct printbuf *buf)
250 	unsigned move = buf->pos - buf->last_field;
251 	int pad = (int) cur_tabstop(buf) - (int) printbuf_linelen(buf);
254 		bch2_printbuf_make_room(buf, pad);
256 		if (buf->last_field + pad < buf->size)
257 			memmove(buf->buf + buf->last_field + pad,
258 				buf->buf + buf->last_field,
259 				min(move, buf->size - 1 - buf->last_field - pad));
261 		if (buf->last_field < buf->size)
262 			memset(buf->buf + buf->last_field, ' ',
263 			       min((unsigned) pad, buf->size - buf->last_field));
265 		buf->pos += pad;
266 		printbuf_nul_terminate(buf);
269 	buf->last_field = buf->pos;
270 	buf->cur_tabstop++;
277  * @buf: printbuf to control
282 void bch2_prt_tab_rjust(struct printbuf *buf)
284 	if (WARN_ON(!cur_tabstop(buf)))
287 	__prt_tab_rjust(buf);
352 				    out->buf + out->pos,
376  * @buf->human_readable_units)
392  * @buf->human_readable_units)