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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* iov.c - helpers for using (partial) iovecs.
*
* Copyrigh Red Hat
* Author: Laurent Vivier <lvivier@redhat.com>
*
* This file also contains code originally from QEMU include/qemu/iov.h:
*
* Author(s):
* Amit Shah <amit.shah@redhat.com>
* Michael Tokarev <mjt@tls.msk.ru>
*/
#ifndef IOVEC_H
#define IOVEC_H
#include <unistd.h>
#include <string.h>
#define IOV_OF_LVALUE(lval) \
(struct iovec){ .iov_base = &(lval), .iov_len = sizeof(lval) }
size_t iov_skip_bytes(const struct iovec *iov, size_t n,
size_t skip, size_t *offset);
size_t iov_from_buf(const struct iovec *iov, size_t iov_cnt,
size_t offset, const void *buf, size_t bytes);
size_t iov_to_buf(const struct iovec *iov, size_t iov_cnt,
size_t offset, void *buf, size_t bytes);
size_t iov_size(const struct iovec *iov, size_t iov_cnt);
unsigned iov_copy(struct iovec *dst_iov, size_t dst_iov_cnt,
const struct iovec *iov, size_t iov_cnt,
size_t offset, size_t bytes);
#endif /* IOVEC_H */
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