172 lines
3.2 KiB
C
172 lines
3.2 KiB
C
/*
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* Copyright (c) 2011 Apple Inc. All rights reserved.
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*
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* @APPLE_APACHE_LICENSE_HEADER_START@
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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* @APPLE_APACHE_LICENSE_HEADER_END@
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*/
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//
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// EndianPortable.c
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//
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// Copyright 2011 Apple Inc. All rights reserved.
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//
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#include "config.h"
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#include "EndianPortable.h"
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#define BSWAP16(x) (((x << 8) | ((x >> 8) & 0x00ff)))
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#define BSWAP32(x) (((x << 24) | ((x << 8) & 0x00ff0000) | ((x >> 8) & 0x0000ff00) | ((x >> 24) & 0x000000ff)))
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#define BSWAP64(x) ((((int64_t)x << 56) | (((int64_t)x << 40) & 0x00ff000000000000LL) | \
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(((int64_t)x << 24) & 0x0000ff0000000000LL) | (((int64_t)x << 8) & 0x000000ff00000000LL) | \
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(((int64_t)x >> 8) & 0x00000000ff000000LL) | (((int64_t)x >> 24) & 0x0000000000ff0000LL) | \
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(((int64_t)x >> 40) & 0x000000000000ff00LL) | (((int64_t)x >> 56) & 0x00000000000000ffLL)))
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#ifndef WORDS_BIGENDIAN
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#define TARGET_RT_LITTLE_ENDIAN 1
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#endif
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uint16_t Swap16NtoB(uint16_t inUInt16)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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return BSWAP16(inUInt16);
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#else
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return inUInt16;
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#endif
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}
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uint16_t Swap16BtoN(uint16_t inUInt16)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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return BSWAP16(inUInt16);
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#else
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return inUInt16;
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#endif
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}
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uint32_t Swap32NtoB(uint32_t inUInt32)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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return BSWAP32(inUInt32);
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#else
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return inUInt32;
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#endif
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}
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uint32_t Swap32BtoN(uint32_t inUInt32)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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return BSWAP32(inUInt32);
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#else
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return inUInt32;
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#endif
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}
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uint64_t Swap64BtoN(uint64_t inUInt64)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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return BSWAP64(inUInt64);
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#else
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return inUInt64;
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#endif
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}
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uint64_t Swap64NtoB(uint64_t inUInt64)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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return BSWAP64(inUInt64);
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#else
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return inUInt64;
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#endif
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}
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float SwapFloat32BtoN(float in)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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union {
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float f;
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int32_t i;
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} x;
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x.f = in;
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x.i = BSWAP32(x.i);
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return x.f;
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#else
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return in;
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#endif
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}
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float SwapFloat32NtoB(float in)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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union {
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float f;
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int32_t i;
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} x;
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x.f = in;
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x.i = BSWAP32(x.i);
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return x.f;
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#else
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return in;
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#endif
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}
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double SwapFloat64BtoN(double in)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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union {
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double f;
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int64_t i;
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} x;
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x.f = in;
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x.i = BSWAP64(x.i);
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return x.f;
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#else
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return in;
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#endif
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}
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double SwapFloat64NtoB(double in)
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{
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#if TARGET_RT_LITTLE_ENDIAN
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union {
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double f;
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int64_t i;
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} x;
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x.f = in;
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x.i = BSWAP64(x.i);
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return x.f;
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#else
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return in;
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#endif
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}
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void Swap16(uint16_t * inUInt16)
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{
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*inUInt16 = BSWAP16(*inUInt16);
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}
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void Swap24(uint8_t * inUInt24)
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{
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uint8_t tempVal = inUInt24[0];
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inUInt24[0] = inUInt24[2];
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inUInt24[2] = tempVal;
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}
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void Swap32(uint32_t * inUInt32)
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{
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*inUInt32 = BSWAP32(*inUInt32);
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}
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