10 static void sbappendsb(struct sbuf *sb, struct mbuf *m);
21 sbfree(struct sbuf *sb)  in sbfree()  argument
23 	free(sb->sb_data);  in sbfree()
27 sbdrop(struct sbuf *sb, int num)  in sbdrop()  argument
33 	if(num > sb->sb_cc)  in sbdrop()
34 		num = sb->sb_cc;  in sbdrop()
35 	sb->sb_cc -= num;  in sbdrop()
36 	sb->sb_rptr += num;  in sbdrop()
37 	if(sb->sb_rptr >= sb->sb_data + sb->sb_datalen)  in sbdrop()
38 		sb->sb_rptr -= sb->sb_datalen;  in sbdrop()
43 sbreserve(struct sbuf *sb, int size)  in sbreserve()  argument
45 	if (sb->sb_data) {  in sbreserve()
47 		if (sb->sb_datalen != size) {  in sbreserve()
48 			sb->sb_wptr = sb->sb_rptr = sb->sb_data = (char *)realloc(sb->sb_data, size);  in sbreserve()
49 			sb->sb_cc = 0;  in sbreserve()
50 			if (sb->sb_wptr)  in sbreserve()
51 			   sb->sb_datalen = size;  in sbreserve()
53 			   sb->sb_datalen = 0;  in sbreserve()
56 		sb->sb_wptr = sb->sb_rptr = sb->sb_data = (char *)malloc(size);  in sbreserve()
57 		sb->sb_cc = 0;  in sbreserve()
58 		if (sb->sb_wptr)  in sbreserve()
59 		   sb->sb_datalen = size;  in sbreserve()
61 		   sb->sb_datalen = 0;  in sbreserve()
132 sbappendsb(struct sbuf *sb, struct mbuf *m)  in sbappendsb()  argument
138 	if (sb->sb_wptr < sb->sb_rptr) {  in sbappendsb()
139 		n = sb->sb_rptr - sb->sb_wptr;  in sbappendsb()
141 		memcpy(sb->sb_wptr, m->m_data, n);  in sbappendsb()
144 		n = sb->sb_data + sb->sb_datalen - sb->sb_wptr;  in sbappendsb()
146 		memcpy(sb->sb_wptr, m->m_data, n);  in sbappendsb()
150 			nn = sb->sb_rptr - sb->sb_data;  in sbappendsb()
152 			memcpy(sb->sb_data,m->m_data+n,nn);  in sbappendsb()
157 	sb->sb_cc += n;  in sbappendsb()
158 	sb->sb_wptr += n;  in sbappendsb()
159 	if (sb->sb_wptr >= sb->sb_data + sb->sb_datalen)  in sbappendsb()
160 		sb->sb_wptr -= sb->sb_datalen;  in sbappendsb()
169 sbcopy(struct sbuf *sb, int off, int len, char *to)  in sbcopy()  argument
173 	from = sb->sb_rptr + off;  in sbcopy()
174 	if (from >= sb->sb_data + sb->sb_datalen)  in sbcopy()
175 		from -= sb->sb_datalen;  in sbcopy()
177 	if (from < sb->sb_wptr) {  in sbcopy()
178 		if (len > sb->sb_cc) len = sb->sb_cc;  in sbcopy()
182 		off = (sb->sb_data + sb->sb_datalen) - from;  in sbcopy()
187 		   memcpy(to+off,sb->sb_data,len);  in sbcopy()