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2ad45811e2
Signed-off-by: Jonathon Jongsma <jjongsma@redhat.com> Reviewed-by: Ján Tomko <jtomko@redhat.com> Signed-off-by: Ján Tomko <jtomko@redhat.com>
115 lines
3.9 KiB
C
115 lines
3.9 KiB
C
/*
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* virendian.h: aid for reading endian-specific data
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*
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* Copyright (C) 2013 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#pragma once
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#include "internal.h"
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/* The interfaces in this file are provided as macros for speed. */
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/**
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* virReadBufInt64BE:
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* @buf: byte to start reading at (can be 'char*' or 'unsigned char*');
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* evaluating buf must not have any side effects
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*
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* Read 8 bytes at BUF as a big-endian 64-bit number. Caller is
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* responsible to avoid reading beyond array bounds.
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*/
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#define virReadBufInt64BE(buf) \
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(((uint64_t)(uint8_t)((buf)[0]) << 56) | \
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((uint64_t)(uint8_t)((buf)[1]) << 48) | \
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((uint64_t)(uint8_t)((buf)[2]) << 40) | \
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((uint64_t)(uint8_t)((buf)[3]) << 32) | \
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((uint64_t)(uint8_t)((buf)[4]) << 24) | \
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((uint64_t)(uint8_t)((buf)[5]) << 16) | \
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((uint64_t)(uint8_t)((buf)[6]) << 8) | \
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(uint64_t)(uint8_t)((buf)[7]))
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/**
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* virReadBufInt64LE:
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* @buf: byte to start reading at (can be 'char*' or 'unsigned char*');
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* evaluating buf must not have any side effects
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*
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* Read 8 bytes at BUF as a little-endian 64-bit number. Caller is
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* responsible to avoid reading beyond array bounds.
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*/
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#define virReadBufInt64LE(buf) \
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((uint64_t)(uint8_t)((buf)[0]) | \
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((uint64_t)(uint8_t)((buf)[1]) << 8) | \
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((uint64_t)(uint8_t)((buf)[2]) << 16) | \
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((uint64_t)(uint8_t)((buf)[3]) << 24) | \
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((uint64_t)(uint8_t)((buf)[4]) << 32) | \
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((uint64_t)(uint8_t)((buf)[5]) << 40) | \
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((uint64_t)(uint8_t)((buf)[6]) << 48) | \
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((uint64_t)(uint8_t)((buf)[7]) << 56))
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/**
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* virReadBufInt32BE:
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* @buf: byte to start reading at (can be 'char*' or 'unsigned char*');
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* evaluating buf must not have any side effects
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*
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* Read 4 bytes at BUF as a big-endian 32-bit number. Caller is
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* responsible to avoid reading beyond array bounds.
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*/
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#define virReadBufInt32BE(buf) \
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(((uint32_t)(uint8_t)((buf)[0]) << 24) | \
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((uint32_t)(uint8_t)((buf)[1]) << 16) | \
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((uint32_t)(uint8_t)((buf)[2]) << 8) | \
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(uint32_t)(uint8_t)((buf)[3]))
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/**
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* virReadBufInt32LE:
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* @buf: byte to start reading at (can be 'char*' or 'unsigned char*');
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* evaluating buf must not have any side effects
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*
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* Read 4 bytes at BUF as a little-endian 32-bit number. Caller is
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* responsible to avoid reading beyond array bounds.
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*/
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#define virReadBufInt32LE(buf) \
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((uint32_t)(uint8_t)((buf)[0]) | \
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((uint32_t)(uint8_t)((buf)[1]) << 8) | \
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((uint32_t)(uint8_t)((buf)[2]) << 16) | \
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((uint32_t)(uint8_t)((buf)[3]) << 24))
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/**
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* virReadBufInt16BE:
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* @buf: byte to start reading at (can be 'char*' or 'unsigned char*');
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* evaluating buf must not have any side effects
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*
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* Read 2 bytes at BUF as a big-endian 16-bit number. Caller is
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* responsible to avoid reading beyond array bounds.
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*/
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#define virReadBufInt16BE(buf) \
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(((uint16_t)(uint8_t)((buf)[0]) << 8) | \
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(uint16_t)(uint8_t)((buf)[1]))
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/**
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* virReadBufInt16LE:
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* @buf: byte to start reading at (can be 'char*' or 'unsigned char*');
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* evaluating buf must not have any side effects
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*
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* Read 2 bytes at BUF as a little-endian 16-bit number. Caller is
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* responsible to avoid reading beyond array bounds.
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*/
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#define virReadBufInt16LE(buf) \
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((uint16_t)(uint8_t)((buf)[0]) | \
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((uint16_t)(uint8_t)((buf)[1]) << 8))
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