bsd/kern/tty_subr.c

104 clalloc(struct clist *clp, int size, int quot)
106 	MALLOC_ZONE(clp->c_cs, u_char *, size, M_TTYS, M_WAITOK);
107 	if (!clp->c_cs)
109 	bzero(clp->c_cs, size);
112 		MALLOC_ZONE(clp->c_cq, u_char *, QMEM(size), M_TTYS, M_WAITOK);
113 		if (!clp->c_cq) {
114 			FREE_ZONE(clp->c_cs, size, M_TTYS);
117 		bzero(clp->c_cs, QMEM(size));
119 		clp->c_cq = (u_char *)0;
121 	clp->c_cf = clp->c_cl = (u_char *)0;
122 	clp->c_ce = clp->c_cs + size;
123 	clp->c_cn = size;
124 	clp->c_cc = 0;
129 clfree(struct clist *clp)
131 	if(clp->c_cs)
132 		FREE_ZONE(clp->c_cs, clp->c_cn, M_TTYS);
133 	if(clp->c_cq)
134 		FREE_ZONE(clp->c_cq, QMEM(clp->c_cn), M_TTYS);
135 	clp->c_cs = clp->c_cq = (u_char *)0;
143 getc(struct clist *clp)
147 	if (clp->c_cc == 0)
150 	c = *clp->c_cf & 0xff;
151 	if (clp->c_cq) {
153 		if (isset(clp->c_cq, clp->c_cf - clp->c_cs) )
156 		if (*(clp->c_cf - clp->c_cs + clp->c_cq))
160 	if (++clp->c_cf == clp->c_ce)
161 		clp->c_cf = clp->c_cs;
162 	if (--clp->c_cc == 0)
163 		clp->c_cf = clp->c_cl = (u_char *)0;
173 q_to_b(struct clist *clp, u_char *cp, int count)
179 	while (count > 0 && clp->c_cc > 0) {
180 		cc = clp->c_cl - clp->c_cf;
181 		if (clp->c_cf >= clp->c_cl)
182 			cc = clp->c_ce - clp->c_cf;
185 		bcopy(clp->c_cf, p, cc);
188 		clp->c_cc -= cc;
189 		clp->c_cf += cc;
190 		if (clp->c_cf == clp->c_ce)
191 			clp->c_cf = clp->c_cs;
193 	if (clp->c_cc == 0)
194 		clp->c_cf = clp->c_cl = (u_char *)0;
203 ndqb(struct clist *clp, int flag)
209 	if ((cc = clp->c_cc) == 0)
213 		count = clp->c_cl - clp->c_cf;
215 			count = clp->c_ce - clp->c_cf;
219 	i = clp->c_cf - clp->c_cs;
221 		while (cc-- > 0 && !(clp->c_cs[i++] & (flag & ~TTY_QUOTE) ||
222 		    isset(clp->c_cq, i))) {
224 			if (i == clp->c_cn)
228 		while (cc-- > 0 && !(clp->c_cs[i++] & flag)) {
230 			if (i == clp->c_cn)
242 ndflush(struct clist *clp, int count)
246 	if (count == clp->c_cc) {
247 		clp->c_cc = 0;
248 		clp->c_cf = clp->c_cl = (u_char *)0;
252 	while (count > 0 && clp->c_cc > 0) {
253 		cc = clp->c_cl - clp->c_cf;
254 		if (clp->c_cf >= clp->c_cl)
255 			cc = clp->c_ce - clp->c_cf;
259 		clp->c_cc -= cc;
260 		clp->c_cf += cc;
261 		if (clp->c_cf == clp->c_ce)
262 			clp->c_cf = clp->c_cs;
264 	if (clp->c_cc == 0)
265 		clp->c_cf = clp->c_cl = (u_char *)0;
272 putc(int c, struct clist *clp)
276 	if (clp->c_cc == 0) {
277 		if (!clp->c_cs) {
281 			if(clalloc(clp, 1024, 1)) {
286 		clp->c_cf = clp->c_cl = clp->c_cs;
289 	if (clp->c_cc == clp->c_cn)
292 	*clp->c_cl = c & 0xff;
293 	i = clp->c_cl - clp->c_cs;
294 	if (clp->c_cq) {
297 			setbit(clp->c_cq, i);
299 			clrbit(clp->c_cq, i);
301 		q = clp->c_cq + i;
305 	clp->c_cc++;
306 	clp->c_cl++;
307 	if (clp->c_cl == clp->c_ce)
308 		clp->c_cl = clp->c_cs;
358 b_to_q(const u_char *cp, int count, struct clist *clp)
367 	if (clp->c_cc == 0) {
368 		if (!clp->c_cs) {
372 			if(clalloc(clp, 1024, 1))
375 		clp->c_cf = clp->c_cl = clp->c_cs;
378 	if (clp->c_cc == clp->c_cn)
382 	while (count > 0 && clp->c_cc < clp->c_cn) {
383 		cc = clp->c_ce - clp->c_cl;
384 		if (clp->c_cf > clp->c_cl)
385 			cc = clp->c_cf - clp->c_cl;
388 		bcopy(p, clp->c_cl, cc);
389 		if (clp->c_cq) {
391 			clrbits(clp->c_cq, clp->c_cl - clp->c_cs, cc);
393 			bzero(clp->c_cl - clp->c_cs + clp->c_cq, cc);
398 		clp->c_cc += cc;
399 		clp->c_cl += cc;
400 		if (clp->c_cl == clp->c_ce)
401 			clp->c_cl = clp->c_cs;
418 nextc(struct clist *clp, u_char *cp, int *c)
420 	if (clp->c_cf == cp) {
424 		cc = clp->c_cc;
430 	if (++cp == clp->c_ce)
431 		cp = clp->c_cs;
433 	if (clp->c_cq) {
435 		if (isset(clp->c_cq, cp - clp->c_cs))
438 		if (*(clp->c_cf - clp->c_cs + clp->c_cq))
456 firstc(struct clist *clp, int *c)
460 	cc = clp->c_cc;
463 	cp = clp->c_cf;
465 	if(clp->c_cq) {
467 		if (isset(clp->c_cq, cp - clp->c_cs))
470 		if (*(cp - clp->c_cs + clp->c_cq))
474 	return clp->c_cf;
481 unputc(struct clist *clp)
485 	if (clp->c_cc == 0)
488 	if (clp->c_cl == clp->c_cs)
489 		clp->c_cl = clp->c_ce - 1;
491 		--clp->c_cl;
492 	clp->c_cc--;
494 	c = *clp->c_cl & 0xff;
495 	if (clp->c_cq) {
497 		if (isset(clp->c_cq, clp->c_cl - clp->c_cs))
500 		if (*(clp->c_cf - clp->c_cs + clp->c_cq))
504 	if (clp->c_cc == 0)
505 		clp->c_cf = clp->c_cl = (u_char *)0;