2a6f8bcca7
Introduce functions to copy to/from a buffer from/to an iovec array, to compute data length in in bytes of an iovec and to copy memory from an iovec to another. iov_from_buf(), iov_to_buf(), iov_size(), iov_copy(). Signed-off-by: Laurent Vivier <lvivier@redhat.com> Message-ID: <20240217150725.661467-2-lvivier@redhat.com> [dwg: Small changes to suppress cppcheck warnings] Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
29 lines
876 B
C
29 lines
876 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* iov.c - helpers for using (partial) iovecs.
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*
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* Copyrigh Red Hat
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* Author: Laurent Vivier <lvivier@redhat.com>
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*
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* This file also contains code originally from QEMU include/qemu/iov.h:
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*
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* Author(s):
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* Amit Shah <amit.shah@redhat.com>
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* Michael Tokarev <mjt@tls.msk.ru>
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*/
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#ifndef IOVEC_H
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#define IOVEC_H
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#include <unistd.h>
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#include <string.h>
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size_t iov_from_buf(const struct iovec *iov, size_t iov_cnt,
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size_t offset, const void *buf, size_t bytes);
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size_t iov_to_buf(const struct iovec *iov, size_t iov_cnt,
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size_t offset, void *buf, size_t bytes);
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size_t iov_size(const struct iovec *iov, size_t iov_cnt);
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unsigned iov_copy(struct iovec *dst_iov, size_t dst_iov_cnt,
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const struct iovec *iov, size_t iov_cnt,
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size_t offset, size_t bytes);
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#endif /* IOVEC_H */
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