22 	sb->alloc = sb->len = 0;  in strbuf_init()
40 		*sz = sb->len;  in strbuf_detach()
47 	if (sb->len + extra + 1 <= sb->len)  in strbuf_grow()
51 	ALLOC_GROW(sb->buf, sb->len + extra + 1, sb->alloc);  in strbuf_grow()
54 static void strbuf_splice(struct strbuf *sb, size_t pos, size_t len,  in strbuf_splice()  argument
57 	if (pos + len < pos)  in strbuf_splice()
59 	if (pos > sb->len)  in strbuf_splice()
61 	if (pos + len > sb->len)  in strbuf_splice()
64 	if (dlen >= len)  in strbuf_splice()
65 		strbuf_grow(sb, dlen - len);  in strbuf_splice()
67 			sb->buf + pos + len,  in strbuf_splice()
68 			sb->len - pos - len);  in strbuf_splice()
70 	strbuf_setlen(sb, sb->len + dlen - len);  in strbuf_splice()
73 void strbuf_remove(struct strbuf *sb, size_t pos, size_t len)  in strbuf_remove()  argument
75 	strbuf_splice(sb, pos, len, NULL, 0);  in strbuf_remove()
78 void strbuf_add(struct strbuf *sb, const void *data, size_t len)  in strbuf_add()  argument
80 	strbuf_grow(sb, len);  in strbuf_add()
81 	memcpy(sb->buf + sb->len, data, len);  in strbuf_add()
82 	strbuf_setlen(sb, sb->len + len);  in strbuf_add()
87 	int len;  in strbuf_addf()  local
93 	len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);  in strbuf_addf()
95 	if (len < 0)  in strbuf_addf()
97 	if (len > strbuf_avail(sb)) {  in strbuf_addf()
98 		strbuf_grow(sb, len);  in strbuf_addf()
100 		len = vsnprintf(sb->buf + sb->len, sb->alloc - sb->len, fmt, ap);  in strbuf_addf()
102 		if (len > strbuf_avail(sb)) {  in strbuf_addf()
106 	strbuf_setlen(sb, sb->len + len);  in strbuf_addf()
111 	size_t oldlen = sb->len;  in strbuf_read()
118 		cnt = read(fd, sb->buf + sb->len, sb->alloc - sb->len - 1);  in strbuf_read()
128 		sb->len += cnt;  in strbuf_read()
132 	sb->buf[sb->len] = '\0';  in strbuf_read()
133 	return sb->len - oldlen;  in strbuf_read()