static int buf_get_buffer(void *opaque, uint8_t *buf, int64_t pos, int size)
{
QEMUBuffer *s = opaque;
ssize_t len = qsb_get_length(s->qsb) - pos;
if (len <= 0) {
return 0;
}
if (len > size) {
len = size;
}
return qsb_get_buffer(s->qsb, pos, len, buf);
}
/**
* Create a deep copy of the given QEMUSizedBuffer.
*
* @qsb: A QEMUSizedBuffer
*
* Returns a clone of @qsb or NULL on allocation failure
*/
QEMUSizedBuffer *qsb_clone(const QEMUSizedBuffer *qsb)
{
QEMUSizedBuffer *out = qsb_create(NULL, qsb_get_length(qsb));
size_t i;
ssize_t res;
off_t pos = 0;
if (!out) {
return NULL;
}
for (i = 0; i < qsb->n_iov; i++) {
res = qsb_write_at(out, qsb->iov[i].iov_base,
pos, qsb->iov[i].iov_len);
if (res < 0) {
qsb_free(out);
return NULL;
}
pos += res;
}
return out;
}
