+ assert(qiov->nalloc != -1);
+
+ qiov->niov = 0;
+ qiov->size = 0;
+}
+
+void qemu_iovec_to_buffer(QEMUIOVector *qiov, void *buf)
+{
+ uint8_t *p = (uint8_t *)buf;
+ int i;
+
+ for (i = 0; i < qiov->niov; ++i) {
+ memcpy(p, qiov->iov[i].iov_base, qiov->iov[i].iov_len);
+ p += qiov->iov[i].iov_len;
+ }
+}
+
+void qemu_iovec_from_buffer(QEMUIOVector *qiov, const void *buf, size_t count)
+{
+ const uint8_t *p = (const uint8_t *)buf;
+ size_t copy;
+ int i;
+
+ for (i = 0; i < qiov->niov && count; ++i) {
+ copy = count;
+ if (copy > qiov->iov[i].iov_len)
+ copy = qiov->iov[i].iov_len;
+ memcpy(qiov->iov[i].iov_base, p, copy);
+ p += copy;
+ count -= copy;
+ }