20 int strbuf_init(struct strbuf *sb, ssize_t hint)  in strbuf_init()  argument
22 	sb->alloc = sb->len = 0;  in strbuf_init()
23 	sb->buf = strbuf_slopbuf;  in strbuf_init()
25 		return strbuf_grow(sb, hint);  in strbuf_init()
29 void strbuf_release(struct strbuf *sb)  in strbuf_release()  argument
31 	if (sb->alloc) {  in strbuf_release()
32 		zfree(&sb->buf);  in strbuf_release()
33 		strbuf_init(sb, 0);  in strbuf_release()
37 char *strbuf_detach(struct strbuf *sb, size_t *sz)  in strbuf_detach()  argument
39 	char *res = sb->alloc ? sb->buf : NULL;  in strbuf_detach()
41 		*sz = sb->len;  in strbuf_detach()
42 	strbuf_init(sb, 0);  in strbuf_detach()
46 int strbuf_grow(struct strbuf *sb, size_t extra)  in strbuf_grow()  argument
49 	size_t nr = sb->len + extra + 1;  in strbuf_grow()
51 	if (nr < sb->alloc)  in strbuf_grow()
54 	if (nr <= sb->len)  in strbuf_grow()
57 	if (alloc_nr(sb->alloc) > nr)  in strbuf_grow()
58 		nr = alloc_nr(sb->alloc);  in strbuf_grow()
64 	buf = realloc(sb->alloc ? sb->buf : NULL, nr * sizeof(*buf));  in strbuf_grow()
68 	sb->buf = buf;  in strbuf_grow()
69 	sb->alloc = nr;  in strbuf_grow()
73 int strbuf_addch(struct strbuf *sb, int c)  in strbuf_addch()  argument
75 	int ret = strbuf_grow(sb, 1);  in strbuf_addch()
79 	sb->buf[sb->len++] = c;  in strbuf_addch()
80 	sb->buf[sb->len] = '\0';  in strbuf_addch()
84 int strbuf_add(struct strbuf *sb, const void *data, size_t len)  in strbuf_add()  argument
86 	int ret = strbuf_grow(sb, len);  in strbuf_add()
90 	memcpy(sb->buf + sb->len, data, len);  in strbuf_add()
91 	return strbuf_setlen(sb, sb->len + len);  in strbuf_add()
94 static int strbuf_addv(struct strbuf *sb, const char *fmt, va_list ap)  in strbuf_addv()  argument
99 	if (!strbuf_avail(sb)) {  in strbuf_addv()
100 		ret = strbuf_grow(sb, 64);  in strbuf_addv()
106 	len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);  in strbuf_addv()
111 	if (len > strbuf_avail(sb)) {  in strbuf_addv()
112 		ret = strbuf_grow(sb, len);  in strbuf_addv()
117 		len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap_saved);  in strbuf_addv()
118 		if (len > strbuf_avail(sb)) {  in strbuf_addv()
125 	return strbuf_setlen(sb, sb->len + len);  in strbuf_addv()
128 int strbuf_addf(struct strbuf *sb, const char *fmt, ...)  in strbuf_addf()  argument
134 	ret = strbuf_addv(sb, fmt, ap);  in strbuf_addf()
139 ssize_t strbuf_read(struct strbuf *sb, int fd, ssize_t hint)  in strbuf_read()  argument
141 	size_t oldlen = sb->len;  in strbuf_read()
142 	size_t oldalloc = sb->alloc;  in strbuf_read()
145 	ret = strbuf_grow(sb, hint ? hint : 8192);  in strbuf_read()
152 		cnt = read(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);  in strbuf_read()
155 				strbuf_release(sb);  in strbuf_read()
157 				strbuf_setlen(sb, oldlen);  in strbuf_read()
162 		sb->len += cnt;  in strbuf_read()
163 		ret = strbuf_grow(sb, 8192);  in strbuf_read()
168 	sb->buf[sb->len] = '\0';  in strbuf_read()
169 	return sb->len - oldlen;  in strbuf_read()