29   struct cbb_buffer_st *base;  in cbb_init()  local
31   base = OPENSSL_malloc(sizeof(struct cbb_buffer_st));  in cbb_init()
32   if (base == NULL) {  in cbb_init()
36   base->buf = buf;  in cbb_init()
37   base->len = 0;  in cbb_init()
38   base->cap = cap;  in cbb_init()
39   base->can_resize = 1;  in cbb_init()
41   cbb->base = base;  in cbb_init()
69   cbb->base->can_resize = 0;  in CBB_init_fixed()
74   if (cbb->base) {  in CBB_cleanup()
79     if (cbb->base->can_resize) {  in CBB_cleanup()
80       OPENSSL_free(cbb->base->buf);  in CBB_cleanup()
82     OPENSSL_free(cbb->base);  in CBB_cleanup()
84   cbb->base = NULL;  in CBB_cleanup()
87 static int cbb_buffer_reserve(struct cbb_buffer_st *base, uint8_t **out,  in cbb_buffer_reserve()  argument
91   if (base == NULL) {  in cbb_buffer_reserve()
95   newlen = base->len + len;  in cbb_buffer_reserve()
96   if (newlen < base->len) {  in cbb_buffer_reserve()
101   if (newlen > base->cap) {  in cbb_buffer_reserve()
102     size_t newcap = base->cap * 2;  in cbb_buffer_reserve()
105     if (!base->can_resize) {  in cbb_buffer_reserve()
109     if (newcap < base->cap || newcap < newlen) {  in cbb_buffer_reserve()
112     newbuf = OPENSSL_realloc(base->buf, newcap);  in cbb_buffer_reserve()
117     base->buf = newbuf;  in cbb_buffer_reserve()
118     base->cap = newcap;  in cbb_buffer_reserve()
122     *out = base->buf + base->len;  in cbb_buffer_reserve()
128 static int cbb_buffer_add(struct cbb_buffer_st *base, uint8_t **out,  in cbb_buffer_add()  argument
130   if (!cbb_buffer_reserve(base, out, len)) {  in cbb_buffer_add()
134   base->len += len;  in cbb_buffer_add()
138 static int cbb_buffer_add_u(struct cbb_buffer_st *base, uint32_t v,  in cbb_buffer_add_u()  argument
146   if (!cbb_buffer_add(base, &buf, len_len)) {  in cbb_buffer_add_u()
166   if (cbb->base->can_resize && (out_data == NULL || out_len == NULL)) {  in CBB_finish()
172     *out_data = cbb->base->buf;  in CBB_finish()
175     *out_len = cbb->base->len;  in CBB_finish()
177   cbb->base->buf = NULL;  in CBB_finish()
188   if (cbb->base == NULL) {  in CBB_flush()
200       cbb->base->len < child_start) {  in CBB_flush()
204   len = cbb->base->len - child_start;  in CBB_flush()
239       if (!cbb_buffer_add(cbb->base, NULL, extra_bytes)) {  in CBB_flush()
242       memmove(cbb->base->buf + child_start + extra_bytes,  in CBB_flush()
243               cbb->base->buf + child_start, len);  in CBB_flush()
245     cbb->base->buf[cbb->child->offset++] = initial_length_byte;  in CBB_flush()
251     cbb->base->buf[cbb->child->offset + i] = len;  in CBB_flush()
258   cbb->child->base = NULL;  in CBB_flush()
266   return cbb->base->buf + cbb->offset + cbb->pending_len_len;  in CBB_data()
271   assert(cbb->offset + cbb->pending_len_len <= cbb->base->len);  in CBB_len()
273   return cbb->base->len - cbb->offset - cbb->pending_len_len;  in CBB_len()
284   size_t offset = cbb->base->len;  in cbb_add_length_prefixed()
285   if (!cbb_buffer_add(cbb->base, &prefix_bytes, len_len)) {  in cbb_add_length_prefixed()
291   out_contents->base = cbb->base;  in cbb_add_length_prefixed()
323   size_t offset = cbb->base->len;  in CBB_add_asn1()
329   out_contents->base = cbb->base;  in CBB_add_asn1()
342       !cbb_buffer_add(cbb->base, &dest, len)) {  in CBB_add_bytes()
351       !cbb_buffer_add(cbb->base, out_data, len)) {  in CBB_add_space()
359       !cbb_buffer_reserve(cbb->base, out_data, len)) {  in CBB_reserve()
366   size_t newlen = cbb->base->len + len;  in CBB_did_write()
368       newlen < cbb->base->len ||  in CBB_did_write()
369       newlen > cbb->base->cap) {  in CBB_did_write()
372   cbb->base->len = newlen;  in CBB_did_write()
381   return cbb_buffer_add_u(cbb->base, value, 1);  in CBB_add_u8()
389   return cbb_buffer_add_u(cbb->base, value, 2);  in CBB_add_u16()
397   return cbb_buffer_add_u(cbb->base, value, 3);  in CBB_add_u24()
405   cbb->base->len = cbb->child->offset;  in CBB_discard_child()
407   cbb->child->base = NULL;  in CBB_discard_child()