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/*
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* endian.c
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*
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* Copyright (c) Steve McIntyre <steve@einval.com>
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*
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* Simple helper routines for marshalling data
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*
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* GNU GPL v2
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*/
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#include <mconfig.h>
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#include "endianconv.h"
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/* Write a 64-bit quantity out into memory in BIG ENDIAN order */
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void write_be64(unsigned long long in, unsigned char *out)
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{
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out[0] = (in >> 56) & 0xFF;
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out[1] = (in >> 48) & 0xFF;
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out[2] = (in >> 40) & 0xFF;
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out[3] = (in >> 32) & 0xFF;
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out[4] = (in >> 24) & 0xFF;
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out[5] = (in >> 16) & 0xFF;
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out[6] = (in >> 8) & 0xFF;
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out[7] = in & 0xFF;
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}
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/* Read in a 64-bit BIG ENDIAN quantity */
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unsigned long long read_be64(unsigned char *in)
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{
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unsigned long long result = 0;
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result |= (unsigned long long)in[0] << 56;
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result |= (unsigned long long)in[1] << 48;
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result |= (unsigned long long)in[2] << 40;
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result |= (unsigned long long)in[3] << 32;
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result |= (unsigned long long)in[4] << 24;
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result |= (unsigned long long)in[5] << 16;
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result |= (unsigned long long)in[6] << 8;
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result |= (unsigned long long)in[7];
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return result;
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}
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/* Write a 64-bit quantity out into memory in LITTLE ENDIAN order */
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void write_le64(unsigned long long in, unsigned char *out)
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{
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out[0] = in & 0xFF;
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out[1] = (in >> 8) & 0xFF;
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out[2] = (in >> 16) & 0xFF;
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out[3] = (in >> 24) & 0xFF;
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out[4] = (in >> 32) & 0xFF;
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out[5] = (in >> 40) & 0xFF;
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out[6] = (in >> 48) & 0xFF;
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out[7] = (in >> 56) & 0xFF;
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}
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/* Read in a 64-bit LITTLE ENDIAN quantity */
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unsigned long long read_le64(unsigned char *in)
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{
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unsigned long long result = 0;
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result |= (unsigned long long)in[0];
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result |= (unsigned long long)in[1] << 8;
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result |= (unsigned long long)in[2] << 16;
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result |= (unsigned long long)in[3] << 24;
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result |= (unsigned long long)in[4] << 32;
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result |= (unsigned long long)in[5] << 40;
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result |= (unsigned long long)in[6] << 48;
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result |= (unsigned long long)in[7] << 56;
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return result;
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}
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/* Write a 48-bit quantity out into memory in LITTLE ENDIAN order */
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void write_le48(unsigned long long in, unsigned char *out)
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{
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out[0] = in & 0xFF;
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out[1] = (in >> 8) & 0xFF;
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out[2] = (in >> 16) & 0xFF;
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out[3] = (in >> 24) & 0xFF;
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out[4] = (in >> 32) & 0xFF;
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out[5] = (in >> 40) & 0xFF;
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}
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/* Read in a 48-bit LITTLE ENDIAN quantity */
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unsigned long long read_le48(unsigned char *in)
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{
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unsigned long long result = 0;
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result |= (unsigned long long)in[0];
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result |= (unsigned long long)in[1] << 8;
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result |= (unsigned long long)in[2] << 16;
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result |= (unsigned long long)in[3] << 24;
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result |= (unsigned long long)in[4] << 32;
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result |= (unsigned long long)in[5] << 40;
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return result;
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}
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/* Write a 32-bit quantity out into memory in BIG ENDIAN order */
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void write_be32(unsigned long in, unsigned char *out)
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{
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out[0] = (in >> 24) & 0xFF;
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out[1] = (in >> 16) & 0xFF;
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out[2] = (in >> 8) & 0xFF;
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out[3] = in & 0xFF;
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}
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/* Read in a 32-bit BIG ENDIAN quantity */
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unsigned long read_be32(unsigned char *in)
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{
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unsigned long result = 0;
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result |= (unsigned long)in[0] << 24;
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result |= (unsigned long)in[1] << 16;
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result |= (unsigned long)in[2] << 8;
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result |= (unsigned long)in[3];
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return result;
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}
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/* Write a 32-bit quantity out into memory in LITTLE ENDIAN order */
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void write_le32(unsigned long in, unsigned char *out)
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{
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out[0] = in & 0xFF;
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out[1] = (in >> 8) & 0xFF;
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out[2] = (in >> 16) & 0xFF;
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out[3] = (in >> 24) & 0xFF;
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}
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/* Read in a 32-bit LITTLE ENDIAN quantity */
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unsigned long read_le32(unsigned char *in)
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{
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unsigned long result = 0;
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result |= (unsigned long)in[0];
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result |= (unsigned long)in[1] << 8;
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result |= (unsigned long)in[2] << 16;
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result |= (unsigned long)in[3] << 24;
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return result;
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}
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/* Write a 16-bit quantity out into memory in BIG ENDIAN order */
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void write_be16(unsigned short in, unsigned char *out)
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{
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out[0] = (in >> 8) & 0xFF;
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out[1] = in & 0xFF;
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}
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/* Read in a 16-bit BIG ENDIAN quantity */
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unsigned short read_be16(unsigned char *in)
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{
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unsigned short result = 0;
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result |= (unsigned short)in[0] << 8;
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result |= (unsigned short)in[1];
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return result;
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}
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/* Write a 16-bit quantity out into memory in LITTLE ENDIAN order */
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void write_le16(unsigned short in, unsigned char *out)
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{
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out[0] = in & 0xFF;
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out[1] = in & 0xFF >> 8;
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}
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/* Read in a 16-bit LITTLE ENDIAN quantity */
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unsigned short read_le16(unsigned char *in)
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{
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unsigned short result = 0;
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result |= (unsigned short)in[0];
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result |= (unsigned short)in[1] << 8;
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return result;
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}
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