/*
* endian.c
*
* Simple helper functions for reading and writing BE and LE numbers
*
* Copyright (c) 2004 Steve McIntyre
*
* GPL v2 - see COPYING
*/
#include "endian.h"
/* Write a 64-bit quantity out into memory in BIG ENDIAN order */
void write_be64(in, out)
unsigned long long in;
unsigned char *out;
{
out[0] = (in >> 56) & 0xFF;
out[1] = (in >> 48) & 0xFF;
out[2] = (in >> 40) & 0xFF;
out[3] = (in >> 32) & 0xFF;
out[4] = (in >> 24) & 0xFF;
out[5] = (in >> 16) & 0xFF;
out[6] = (in >> 8) & 0xFF;
out[7] = in & 0xFF;
}
/* Read in a 64-bit BIG ENDIAN quantity */
unsigned long long read_be64(in)
unsigned char *in;
{
unsigned long long result = 0;
result |= (unsigned long long)in[0] << 56;
result |= (unsigned long long)in[1] << 48;
result |= (unsigned long long)in[2] << 40;
result |= (unsigned long long)in[3] << 32;
result |= (unsigned long long)in[4] << 24;
result |= (unsigned long long)in[5] << 16;
result |= (unsigned long long)in[6] << 8;
result |= (unsigned long long)in[7];
return result;
}
/* Write a 64-bit quantity out into memory in LITTLE ENDIAN order */
void write_le64(in, out)
unsigned long long in;
unsigned char *out;
{
out[0] = in & 0xFF;
out[1] = (in >> 8) & 0xFF;
out[2] = (in >> 16) & 0xFF;
out[3] = (in >> 24) & 0xFF;
out[4] = (in >> 32) & 0xFF;
out[5] = (in >> 40) & 0xFF;
out[6] = (in >> 48) & 0xFF;
out[7] = (in >> 56) & 0xFF;
}
/* Read in a 64-bit LITTLE ENDIAN quantity */
unsigned long long read_le64(in)
unsigned char *in;
{
unsigned long long result = 0;
result |= (unsigned long long)in[0];
result |= (unsigned long long)in[1] << 8;
result |= (unsigned long long)in[2] << 16;
result |= (unsigned long long)in[3] << 24;
result |= (unsigned long long)in[4] << 32;
result |= (unsigned long long)in[5] << 40;
result |= (unsigned long long)in[6] << 48;
result |= (unsigned long long)in[7] << 56;
return result;
}
/* Write a 48-bit quantity out into memory in LITTLE ENDIAN order */
void write_le48(in, out)
unsigned long long in;
unsigned char *out;
{
out[0] = in & 0xFF;
out[1] = (in >> 8) & 0xFF;
out[2] = (in >> 16) & 0xFF;
out[3] = (in >> 24) & 0xFF;
out[4] = (in >> 32) & 0xFF;
out[5] = (in >> 40) & 0xFF;
}
/* Read in a 48-bit LITTLE ENDIAN quantity */
unsigned long long read_le48(in)
unsigned char *in;
{
unsigned long long result = 0;
result |= (unsigned long long)in[0];
result |= (unsigned long long)in[1] << 8;
result |= (unsigned long long)in[2] << 16;
result |= (unsigned long long)in[3] << 24;
result |= (unsigned long long)in[4] << 32;
result |= (unsigned long long)in[5] << 40;
return result;
}
/* Write a 32-bit quantity out into memory in BIG ENDIAN order */
void write_be32(in, out)
unsigned long in;
unsigned char *out;
{
out[0] = (in >> 24) & 0xFF;
out[1] = (in >> 16) & 0xFF;
out[2] = (in >> 8) & 0xFF;
out[3] = in & 0xFF;
}
/* Read in a 32-bit BIG ENDIAN quantity */
unsigned long read_be32(in)
unsigned char *in;
{
unsigned long result = 0;
result |= (unsigned long)in[0] << 24;
result |= (unsigned long)in[1] << 16;
result |= (unsigned long)in[2] << 8;
result |= (unsigned long)in[3];
return result;
}
/* Write a 32-bit quantity out into memory in LITTLE ENDIAN order */
void write_le32(in, out)
unsigned long in;
unsigned char *out;
{
out[0] = in & 0xFF;
out[1] = (in >> 8) & 0xFF;
out[2] = (in >> 16) & 0xFF;
out[3] = (in >> 24) & 0xFF;
}
/* Read in a 32-bit LITTLE ENDIAN quantity */
unsigned long read_le32(in)
unsigned char *in;
{
unsigned long result = 0;
result |= (unsigned long)in[0];
result |= (unsigned long)in[1] << 8;
result |= (unsigned long)in[2] << 16;
result |= (unsigned long)in[3] << 24;
return result;
}
/* Write a 16-bit quantity out into memory in BIG ENDIAN order */
void write_be16(in, out)
unsigned short in;
unsigned char *out;
{
out[0] = (in >> 8) & 0xFF;
out[1] = in & 0xFF;
}
/* Read in a 16-bit BIG ENDIAN quantity */
unsigned short read_be16(in)
unsigned char *in;
{
unsigned short result = 0;
result |= (unsigned short)in[0] << 8;
result |= (unsigned short)in[1];
return result;
}
/* Write a 16-bit quantity out into memory in LITTLE ENDIAN order */
void write_le16(in, out)
unsigned short in;
unsigned char *out;
{
out[0] = in & 0xFF;
out[1] = in & 0xFF >> 8;
}
/* Read in a 16-bit LITTLE ENDIAN quantity */
unsigned short read_le16(in)
unsigned char *in;
{
unsigned short result = 0;
result |= (unsigned short)in[0];
result |= (unsigned short)in[1] << 8;
return result;
}