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// File Name: jausDouble.c
//
// Written By: Danny Kent (jaus AT dannykent DOT com), Tom Galluzzo (galluzzo AT gmail DOT com)
//
// Version: 3.3.0a
//
// Date: 08/07/08
//
// Description: This file defines all the basic JausDouble funtionality, this should be primarily used through the JausType file and its methods

#include <string.h>
#include <stdlib.h>
#include "jaus.h"

JausDouble newJausDouble(double val)
{
	return val;
}

JausBoolean jausDoubleFromBuffer(JausDouble *jDouble, unsigned char *buf, unsigned int bufferSizeBytes)
{
#ifdef JAUS_BIG_ENDIAN
	int i = 0;
	unsigned long tempLong = 0;
#endif	
	double tempDouble = 0.0;
	
	if(bufferSizeBytes < JAUS_DOUBLE_SIZE_BYTES)
	{
		return JAUS_FALSE; // insufficient data in buffer
	}
	else
	{
#ifdef JAUS_BIG_ENDIAN
		// swap bytes
		for(i = 0; i < JAUS_DOUBLE_SIZE_BYTES; i++)
		{
			tempLong += (buf[i] << (JAUS_DOUBLE_SIZE_BYTES-i-1)*8);
		}
		memcpy(&(tempDouble), &(tempLong), JAUS_DOUBLE_SIZE_BYTES);
#else
		memcpy(&tempDouble, buf, JAUS_DOUBLE_SIZE_BYTES);
#endif
		*jDouble = newJausDouble(tempDouble);
		return JAUS_TRUE;
	}
}

JausBoolean jausDoubleToBuffer(JausDouble input, unsigned char *buf, unsigned int bufferSizeBytes)
{
#ifdef JAUS_BIG_ENDIAN
	int i = 0;
	unsigned long tempLong = 0;
#endif	

	if(bufferSizeBytes < JAUS_DOUBLE_SIZE_BYTES)
	{
		return JAUS_FALSE; // insufficient room in buffer
	}
	else
	{
#ifdef JAUS_BIG_ENDIAN
		memcpy(&(tempLong), &(input), JAUS_DOUBLE_SIZE_BYTES);
		// swap bytes
		for (i = 0; i < JAUS_DOUBLE_SIZE_BYTES; i++)
		{
			buf[i] = (unsigned char)((tempLong >> (JAUS_DOUBLE_SIZE_BYTES-i-1)*8) & 0xFF); // 8 bits per byte
		}
#else
		memcpy(buf, &(input), JAUS_DOUBLE_SIZE_BYTES);
#endif
	
		return JAUS_TRUE;
	}
}