a6dbe3721e
per Intel policy to include file commit date using git cmd below. The policy does not apply to non-Intel (C) notices. git log --follow -C90% --format=%ad --date default <file> | tail -1 and then pull just the 4 digit year from the result. Intel copyrights were not added to files where Intel either had no contribution ot the contribution lacked substance (ie license header updates, formatting changes, etc). Contribution date used "--follow -C95%" to get the most accurate date. Note that several files in this patch didn't end the license/(c) block with a blank comment line so these were added as the vast majority of files do have this last blank line. Simply there for consistency. Signed-off-by: paul luse <paul.e.luse@intel.com> Change-Id: Id5b7ce4f658fe87132f14139ead58d6e285c04d4 Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/15192 Tested-by: SPDK CI Jenkins <sys_sgci@intel.com> Reviewed-by: Jim Harris <james.r.harris@intel.com> Reviewed-by: Ben Walker <benjamin.walker@intel.com> Community-CI: Mellanox Build Bot
136 lines
3.0 KiB
C
136 lines
3.0 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright (C) 2019 Intel Corporation.
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* All rights reserved.
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*/
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#include "spdk/util.h"
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size_t
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spdk_ioviter_first(struct spdk_ioviter *iter,
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struct iovec *siov, size_t siovcnt,
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struct iovec *diov, size_t diovcnt,
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void **src, void **dst)
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{
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iter->siov = siov;
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iter->siovcnt = siovcnt;
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iter->diov = diov;
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iter->diovcnt = diovcnt;
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iter->sidx = 0;
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iter->didx = 0;
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iter->siov_len = siov[0].iov_len;
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iter->siov_base = siov[0].iov_base;
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iter->diov_len = diov[0].iov_len;
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iter->diov_base = diov[0].iov_base;
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return spdk_ioviter_next(iter, src, dst);
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}
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size_t
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spdk_ioviter_next(struct spdk_ioviter *iter, void **src, void **dst)
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{
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size_t len = 0;
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if (iter->sidx == iter->siovcnt ||
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iter->didx == iter->diovcnt ||
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iter->siov_len == 0 ||
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iter->diov_len == 0) {
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return 0;
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}
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*src = iter->siov_base;
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*dst = iter->diov_base;
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len = spdk_min(iter->siov_len, iter->diov_len);
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if (iter->siov_len == iter->diov_len) {
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/* Advance both iovs to the next element */
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iter->sidx++;
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if (iter->sidx == iter->siovcnt) {
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return len;
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}
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iter->didx++;
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if (iter->didx == iter->diovcnt) {
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return len;
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}
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iter->siov_len = iter->siov[iter->sidx].iov_len;
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iter->siov_base = iter->siov[iter->sidx].iov_base;
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iter->diov_len = iter->diov[iter->didx].iov_len;
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iter->diov_base = iter->diov[iter->didx].iov_base;
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} else if (iter->siov_len < iter->diov_len) {
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/* Advance only the source to the next element */
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iter->sidx++;
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if (iter->sidx == iter->siovcnt) {
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return len;
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}
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iter->diov_base += iter->siov_len;
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iter->diov_len -= iter->siov_len;
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iter->siov_len = iter->siov[iter->sidx].iov_len;
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iter->siov_base = iter->siov[iter->sidx].iov_base;
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} else {
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/* Advance only the destination to the next element */
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iter->didx++;
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if (iter->didx == iter->diovcnt) {
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return len;
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}
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iter->siov_base += iter->diov_len;
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iter->siov_len -= iter->diov_len;
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iter->diov_len = iter->diov[iter->didx].iov_len;
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iter->diov_base = iter->diov[iter->didx].iov_base;
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}
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return len;
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}
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size_t
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spdk_iovcpy(struct iovec *siov, size_t siovcnt, struct iovec *diov, size_t diovcnt)
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{
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struct spdk_ioviter iter;
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size_t len, total_sz;
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void *src, *dst;
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total_sz = 0;
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for (len = spdk_ioviter_first(&iter, siov, siovcnt, diov, diovcnt, &src, &dst);
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len != 0;
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len = spdk_ioviter_next(&iter, &src, &dst)) {
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memcpy(dst, src, len);
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total_sz += len;
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}
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return total_sz;
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}
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void
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spdk_copy_iovs_to_buf(void *buf, size_t buf_len, struct iovec *iovs, int iovcnt)
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{
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int i;
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size_t len;
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for (i = 0; i < iovcnt; i++) {
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len = spdk_min(iovs[i].iov_len, buf_len);
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memcpy(buf, iovs[i].iov_base, len);
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buf += len;
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assert(buf_len >= len);
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buf_len -= len;
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}
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}
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void
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spdk_copy_buf_to_iovs(struct iovec *iovs, int iovcnt, void *buf, size_t buf_len)
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{
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int i;
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size_t len;
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for (i = 0; i < iovcnt; i++) {
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len = spdk_min(iovs[i].iov_len, buf_len);
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memcpy(iovs[i].iov_base, buf, len);
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buf += len;
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assert(buf_len >= len);
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buf_len -= len;
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}
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}
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