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| author | Stefan Hajnoczi <stefanha@redhat.com> | 2012-11-22 16:06:06 +0100 |
|---|---|---|
| committer | Stefan Hajnoczi <stefanha@redhat.com> | 2013-01-02 15:58:09 +0100 |
| commit | 530c0bbd73e1b658c9266582072847de1fbdff10 (patch) | |
| tree | 0bfc3c86db76b8965464568a1846a26320ab8cc6 /include | |
| parent | 8962e44fe438a051aff9f43209363f599be33624 (diff) | |
| download | qemu-530c0bbd73e1b658c9266582072847de1fbdff10.tar.gz | |
iov: add qemu_iovec_concat_iov()
The qemu_iovec_concat() function copies a subset of a QEMUIOVector. The
new qemu_iovec_concat_iov() function does the same for a iov/cnt pair.
It is easy to define qemu_iovec_concat() in terms of
qemu_iovec_concat_iov(). The existing code is mostly unchanged, except
for the assertion src->size >= soffset, which cannot be efficiently
checked upfront on a iov/cnt pair. Instead we assert upon hitting the
end of src with an unsatisfied soffset.
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/qemu-common.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/qemu-common.h b/include/qemu-common.h index 6871cab371..2b83de395c 100644 --- a/include/qemu-common.h +++ b/include/qemu-common.h @@ -329,6 +329,9 @@ void qemu_iovec_init_external(QEMUIOVector *qiov, struct iovec *iov, int niov); void qemu_iovec_add(QEMUIOVector *qiov, void *base, size_t len); void qemu_iovec_concat(QEMUIOVector *dst, QEMUIOVector *src, size_t soffset, size_t sbytes); +void qemu_iovec_concat_iov(QEMUIOVector *dst, + struct iovec *src_iov, unsigned int src_cnt, + size_t soffset, size_t sbytes); void qemu_iovec_destroy(QEMUIOVector *qiov); void qemu_iovec_reset(QEMUIOVector *qiov); size_t qemu_iovec_to_buf(QEMUIOVector *qiov, size_t offset, |