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Prep v228: Added missing src/basic/unaligned.h from upstream

keep-around/964a6d9fb555cc86528eb1cc1f6d044f85584842
Sven Eden 5 years ago
parent
commit
7684d7642e
  1. 7
      .gitignore
  2. 1
      Makefile.am
  3. 113
      src/basic/unaligned.h

7
.gitignore

@ -289,6 +289,13 @@ config.status
configure
stamp-*
# elogind specific
/elogind
/elogind-cgroups-agent
/elogind-inhibit
/test-libelogind*
# Local Helper Scripts and Tools - Not for distribution
check_tree.sh
cleanup*.sh

1
Makefile.am

@ -305,6 +305,7 @@ libbasic_la_SOURCES = \
src/basic/hostname-util.c \
src/basic/unit-name.c \
src/basic/unit-name.h \
src/basic/unaligned.h \
src/basic/util.c \
src/basic/util.h \
src/basic/path-util.c \

113
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));
}
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