15 void membuff_purge(struct membuff *mb)  in membuff_purge()  argument
18 	mb->head = mb->start;  in membuff_purge()
19 	mb->tail = mb->start;  in membuff_purge()
22 static int membuff_putrawflex(struct membuff *mb, int maxlen, bool update,  in membuff_putrawflex()  argument
29 	*data = &mb->start;  in membuff_putrawflex()
30 	*offsetp = mb->head - mb->start;  in membuff_putrawflex()
33 	if (!mb->start)  in membuff_putrawflex()
40 	if (mb->head >= mb->tail) {  in membuff_putrawflex()
42 		len = mb->end - mb->head - 1;  in membuff_putrawflex()
48 			mb->head += len;  in membuff_putrawflex()
54 		if ((maxlen < 0 || len < maxlen) && mb->tail != mb->start) {  in membuff_putrawflex()
57 				mb->head = mb->start;  in membuff_putrawflex()
63 		len = mb->tail - mb->head - 1;  in membuff_putrawflex()
69 			mb->head += len;  in membuff_putrawflex()
76 int membuff_putraw(struct membuff *mb, int maxlen, bool update, char **data)  in membuff_putraw()  argument
82 	size = membuff_putrawflex(mb, maxlen, update, &datap, &offset);  in membuff_putraw()
88 bool membuff_putbyte(struct membuff *mb, int ch)  in membuff_putbyte()  argument
92 	if (membuff_putraw(mb, 1, true, &data) != 1)  in membuff_putbyte()
99 int membuff_getraw(struct membuff *mb, int maxlen, bool update, char **data)  in membuff_getraw()  argument
110 	if (mb->head > mb->tail) {  in membuff_getraw()
112 		*data = mb->tail;  in membuff_getraw()
113 		len = mb->head - mb->tail;  in membuff_getraw()
121 			mb->tail += len;  in membuff_getraw()
129 	else if (mb->head < mb->tail) {  in membuff_getraw()
131 		*data = mb->tail;  in membuff_getraw()
132 		len = mb->end - mb->tail;  in membuff_getraw()
136 			mb->tail += len;  in membuff_getraw()
137 			if (mb->tail == mb->end)  in membuff_getraw()
138 				mb->tail = mb->start;  in membuff_getraw()
143 	      maxlen, update, (int)(mb->head - mb->start),  in membuff_getraw()
144 	      (int)(mb->tail - mb->start), (int)(*data - mb->start), len);  in membuff_getraw()
150 int membuff_getbyte(struct membuff *mb)  in membuff_getbyte()  argument
154 	return membuff_getraw(mb, 1, true, &data) != 1 ? -1 : *(uint8_t *)data;  in membuff_getbyte()
157 int membuff_peekbyte(struct membuff *mb)  in membuff_peekbyte()  argument
161 	return membuff_getraw(mb, 1, false, &data) != 1 ? -1 : *(uint8_t *)data;  in membuff_peekbyte()
164 int membuff_get(struct membuff *mb, char *buff, int maxlen)  in membuff_get()  argument
175 		len = membuff_getraw(mb, maxlen, true, &data);  in membuff_get()
187 int membuff_put(struct membuff *mb, const char *buff, int length)  in membuff_put()  argument
194 		towrite = membuff_putraw(mb, length, true, &data);  in membuff_put()
207 bool membuff_isempty(struct membuff *mb)  in membuff_isempty()  argument
209 	return mb->head == mb->tail;  in membuff_isempty()
212 int membuff_avail(struct membuff *mb)  in membuff_avail()  argument
219 	copy = *mb;  in membuff_avail()
229 int membuff_size(struct membuff *mb)  in membuff_size()  argument
231 	return mb->end - mb->start;  in membuff_size()
234 bool membuff_makecontig(struct membuff *mb)  in membuff_makecontig()  argument
239 	      (int)(mb->head - mb->start), (int)(mb->tail - mb->start),  in membuff_makecontig()
240 	      (int)(mb->end - mb->start));  in membuff_makecontig()
246 	if (mb->tail > mb->head) {  in membuff_makecontig()
252 		topsize = mb->end - mb->tail;  in membuff_makecontig()
253 		botsize = mb->head - mb->start;  in membuff_makecontig()
259 		if (mb->head + topsize >= mb->tail)  in membuff_makecontig()
261 		memmove(mb->start + topsize, mb->start, botsize);  in membuff_makecontig()
266 		topsize = mb->head - mb->tail;  in membuff_makecontig()
271 	memcpy(mb->start, mb->tail, topsize);  in membuff_makecontig()
272 	debug("	- memcpy(%d, %d, %d)", 0, (int)(mb->tail - mb->start), topsize);  in membuff_makecontig()
275 	mb->tail = mb->start;  in membuff_makecontig()
276 	mb->head = mb->start + topsize + botsize;  in membuff_makecontig()
278 	debug("	- head=%d, tail=%d", (int)(mb->head - mb->start),  in membuff_makecontig()
279 	      (int)(mb->tail - mb->start));  in membuff_makecontig()
285 int membuff_free(struct membuff *mb)  in membuff_free()  argument
287 	return mb->end == mb->start ? 0 :  in membuff_free()
288 			(mb->end - mb->start) - 1 - membuff_avail(mb);  in membuff_free()
291 int membuff_readline(struct membuff *mb, char *str, int maxlen, int minch)  in membuff_readline()  argument
298 	end = mb->head >= mb->tail ? mb->head : mb->end;  in membuff_readline()
299 	for (len = 0, s = mb->tail; s < end && len < maxlen - 1; str++) {  in membuff_readline()
306 		if (s == end && mb->tail > mb->head) {  in membuff_readline()
307 			s = mb->start;  in membuff_readline()
308 			end = mb->head;  in membuff_readline()
321 	mb->tail = s == mb->end ? mb->start : s;  in membuff_readline()
326 int membuff_extend_by(struct membuff *mb, int by, int max)  in membuff_extend_by()  argument
334 	for (orig = mb->end - mb->start, size = orig; size < orig + by;)  in membuff_extend_by()
344 	oldhead = mb->head - mb->start;  in membuff_extend_by()
345 	oldtail = mb->tail - mb->start;  in membuff_extend_by()
346 	ptr = realloc(mb->start, size);  in membuff_extend_by()
349 	mb->start = ptr;  in membuff_extend_by()
350 	mb->head = mb->start + oldhead;  in membuff_extend_by()
351 	mb->tail = mb->start + oldtail;  in membuff_extend_by()
353 	if (mb->head < mb->tail) {  in membuff_extend_by()
354 		memmove(mb->tail + by, mb->tail, orig - oldtail);  in membuff_extend_by()
355 		mb->tail += by;  in membuff_extend_by()
357 	mb->end = mb->start + size;  in membuff_extend_by()
362 void membuff_init(struct membuff *mb, char *buff, int size)  in membuff_init()  argument
364 	mb->start = buff;  in membuff_init()
365 	mb->end = mb->start + size;  in membuff_init()
366 	membuff_purge(mb);  in membuff_init()
369 int membuff_new(struct membuff *mb, int size)  in membuff_new()  argument
371 	mb->start = malloc(size);  in membuff_new()
372 	if (!mb->start)  in membuff_new()
375 	membuff_init(mb, mb->start, size);  in membuff_new()
379 void membuff_uninit(struct membuff *mb)  in membuff_uninit()  argument
381 	mb->end = NULL;  in membuff_uninit()
382 	mb->start = NULL;  in membuff_uninit()
383 	membuff_purge(mb);  in membuff_uninit()
386 void membuff_dispose(struct membuff *mb)  in membuff_dispose()  argument
388 	free(&mb->start);  in membuff_dispose()
389 	membuff_uninit(mb);  in membuff_dispose()