for (si = 0; si < iov_cnt && offset >= iov[si].iov_len; ++si) {
offset -= iov[si].iov_len;
}
+
+ /* si == iov_cnt would only be valid if bytes == 0, which
+ * we already ruled out above. */
+ assert(si < iov_cnt);
+ iov += si;
+ iov_cnt -= si;
+
if (offset) {
- assert(si < iov_cnt);
/* second, skip `offset' bytes from the (now) first element,
* undo it on exit */
- iov[si].iov_base += offset;
- iov[si].iov_len -= offset;
+ iov[0].iov_base += offset;
+ iov[0].iov_len -= offset;
}
/* Find the end position skipping `bytes' bytes: */
/* first, skip all full-sized elements */
- for (ei = si; ei < iov_cnt && iov[ei].iov_len <= bytes; ++ei) {
+ for (ei = 0; ei < iov_cnt && iov[ei].iov_len <= bytes; ++ei) {
bytes -= iov[ei].iov_len;
}
if (bytes) {
++ei;
}
- ret = do_send_recv(sockfd, iov + si, ei - si, do_send);
+ ret = do_send_recv(sockfd, iov, ei, do_send);
/* Undo the changes above */
if (offset) {
- iov[si].iov_base -= offset;
- iov[si].iov_len += offset;
+ iov[0].iov_base -= offset;
+ iov[0].iov_len += offset;
}
if (bytes) {
iov[ei-1].iov_len += bytes;