61 struct sbuf {  struct
68 #define	sbuf_retract(sbuf, amount) ((sbuf)->end -= (amount))  argument
70 #define	sbuf_length(sbuf) ((sbuf)->end - (sbuf)->content)  argument
79 static struct sbuf	*whatis_proto;
80 static struct sbuf	*whatis_final;
147 sbuf_clear(struct sbuf *sbuf)  in sbuf_clear()  argument
150 	sbuf->end = sbuf->content;  in sbuf_clear()
156 static struct sbuf *
159 	struct sbuf	*sbuf;  in new_sbuf()  local
161 	if ((sbuf = malloc(sizeof (struct sbuf))) == NULL)  in new_sbuf()
163 	if ((sbuf->content = (char *)malloc(LINE_ALLOC)) == NULL)  in new_sbuf()
165 	sbuf->last = sbuf->content + LINE_ALLOC - 1;  in new_sbuf()
166 	sbuf_clear(sbuf);  in new_sbuf()
168 	return (sbuf);  in new_sbuf()
176 sbuf_need(struct sbuf *sbuf, int nchars)  in sbuf_need()  argument
187 	if (sbuf->end + nchars > sbuf->last) {  in sbuf_need()
188 		size = sbuf->last + 1 - sbuf->content;  in sbuf_need()
190 		cntsize = sbuf->end - sbuf->content;  in sbuf_need()
192 		if ((new_content = realloc(sbuf->content, size)) == NULL) {  in sbuf_need()
198 		sbuf->content = new_content;  in sbuf_need()
199 		sbuf->end = new_content + cntsize;  in sbuf_need()
200 		sbuf->last = new_content + size - 1;  in sbuf_need()
208 sbuf_append(struct sbuf *sbuf, const char *text, int length)  in sbuf_append()  argument
211 		sbuf_need(sbuf, length);  in sbuf_append()
212 		(void) memcpy(sbuf->end, text, length);  in sbuf_append()
213 		sbuf->end += length;  in sbuf_append()
221 sbuf_append_str(struct sbuf *sbuf, char *text)  in sbuf_append_str()  argument
224 	sbuf_append(sbuf, text, strlen(text));  in sbuf_append_str()
231 sbuf_append_edited(struct sbuf *sbuf, char *text, edited_copy copy)  in sbuf_append_edited()  argument
236 		sbuf_need(sbuf, length);  in sbuf_append_edited()
237 		sbuf->end = copy(text, sbuf->end, length);  in sbuf_append_edited()
245 sbuf_strip(struct sbuf *sbuf, const char *set)  in sbuf_strip()  argument
248 	while (sbuf->end > sbuf->content && strchr(set, sbuf->end[-1]) != NULL)  in sbuf_strip()
249 		sbuf->end--;  in sbuf_strip()
256 sbuf_content(struct sbuf *sbuf)  in sbuf_content()  argument
259 	*sbuf->end = '\0';  in sbuf_content()
260 	return (sbuf->content);  in sbuf_content()