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authorSven Eden <yamakuzure@gmx.net>2017-04-04 11:32:42 +0200
committerSven Eden <yamakuzure@gmx.net>2017-04-26 12:59:13 +0200
commit7684d7642ed3e667bfeb03abec840e394f8fed35 (patch)
treebc2e52b6300156320148dd95031ce0a7b2a697ed /src/basic
parent62652445485cc08931085f1db8b030042caf4f23 (diff)
Prep v228: Added missing src/basic/unaligned.h from upstream
Diffstat (limited to 'src/basic')
-rw-r--r--src/basic/unaligned.h113
1 files changed, 113 insertions, 0 deletions
diff --git a/src/basic/unaligned.h b/src/basic/unaligned.h
new file mode 100644
index 000000000..a8115eaa1
--- /dev/null
+++ b/src/basic/unaligned.h
@@ -0,0 +1,113 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+#pragma once
+
+/***
+ This file is part of systemd.
+
+ Copyright 2014 Tom Gundersen
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include <endian.h>
+#include <stdint.h>
+
+/* BE */
+
+static inline uint16_t unaligned_read_be16(const void *_u) {
+ const uint8_t *u = _u;
+
+ return (((uint16_t) u[0]) << 8) |
+ ((uint16_t) u[1]);
+}
+
+static inline uint32_t unaligned_read_be32(const void *_u) {
+ const uint8_t *u = _u;
+
+ return (((uint32_t) unaligned_read_be16(u)) << 16) |
+ ((uint32_t) unaligned_read_be16(u + 2));
+}
+
+static inline uint64_t unaligned_read_be64(const void *_u) {
+ const uint8_t *u = _u;
+
+ return (((uint64_t) unaligned_read_be32(u)) << 32) |
+ ((uint64_t) unaligned_read_be32(u + 4));
+}
+
+static inline void unaligned_write_be16(void *_u, uint16_t a) {
+ uint8_t *u = _u;
+
+ u[0] = (uint8_t) (a >> 8);
+ u[1] = (uint8_t) a;
+}
+
+static inline void unaligned_write_be32(void *_u, uint32_t a) {
+ uint8_t *u = _u;
+
+ unaligned_write_be16(u, (uint16_t) (a >> 16));
+ unaligned_write_be16(u + 2, (uint16_t) a);
+}
+
+static inline void unaligned_write_be64(void *_u, uint64_t a) {
+ uint8_t *u = _u;
+
+ unaligned_write_be32(u, (uint32_t) (a >> 32));
+ unaligned_write_be32(u + 4, (uint32_t) a);
+}
+
+/* LE */
+
+static inline uint16_t unaligned_read_le16(const void *_u) {
+ const uint8_t *u = _u;
+
+ return (((uint16_t) u[1]) << 8) |
+ ((uint16_t) u[0]);
+}
+
+static inline uint32_t unaligned_read_le32(const void *_u) {
+ const uint8_t *u = _u;
+
+ return (((uint32_t) unaligned_read_le16(u + 2)) << 16) |
+ ((uint32_t) unaligned_read_le16(u));
+}
+
+static inline uint64_t unaligned_read_le64(const void *_u) {
+ const uint8_t *u = _u;
+
+ return (((uint64_t) unaligned_read_le32(u + 4)) << 32) |
+ ((uint64_t) unaligned_read_le32(u));
+}
+
+static inline void unaligned_write_le16(void *_u, uint16_t a) {
+ uint8_t *u = _u;
+
+ u[0] = (uint8_t) a;
+ u[1] = (uint8_t) (a >> 8);
+}
+
+static inline void unaligned_write_le32(void *_u, uint32_t a) {
+ uint8_t *u = _u;
+
+ unaligned_write_le16(u, (uint16_t) a);
+ unaligned_write_le16(u + 2, (uint16_t) (a >> 16));
+}
+
+static inline void unaligned_write_le64(void *_u, uint64_t a) {
+ uint8_t *u = _u;
+
+ unaligned_write_le32(u, (uint32_t) a);
+ unaligned_write_le32(u + 4, (uint32_t) (a >> 32));
+}