iLE_Math.cpp

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00001 //===========================================================================
00002 //Copyright (C) 2003, 2004 Zentaro Kavanagh
00003 //
00004 //Redistribution and use in source and binary forms, with or without
00005 //modification, are permitted provided that the following conditions
00006 //are met:
00007 //
00008 //- Redistributions of source code must retain the above copyright
00009 //  notice, this list of conditions and the following disclaimer.
00010 //
00011 //- Redistributions in binary form must reproduce the above copyright
00012 //  notice, this list of conditions and the following disclaimer in the
00013 //  documentation and/or other materials provided with the distribution.
00014 //
00015 //- Neither the name of Zentaro Kavanagh nor the names of contributors 
00016 //  may be used to endorse or promote products derived from this software 
00017 //  without specific prior written permission.
00018 //
00019 //THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
00020 //``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
00021 //LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
00022 //PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE ORGANISATION OR
00023 //CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
00024 //EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
00025 //PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
00026 //PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
00027 //LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
00028 //NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
00029 //SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00030 //===========================================================================
00031 
00032 #include "stdafx.h"
00033 #include <libilliCore/iLE_Math.h>
00034 
00035 iLE_Math::iLE_Math(void)
00036 {
00037 }
00038 
00039 iLE_Math::~iLE_Math(void)
00040 {
00041 }
00042 
00043 unsigned long iLE_Math::charArrToULong(const unsigned char* inCharArray)
00044 {
00045         //Turns the next four bytes from the pointer in a long LSB (least sig. byte first/leftmost)
00046         unsigned long locVal = 0;
00047         for (int i = 3; i >= 0; i--) {
00048                 locVal <<= 8;
00049                 locVal += inCharArray[i];
00050         }
00051         return locVal;
00052 }
00053 void iLE_Math::ULongToCharArr(unsigned long inLong, unsigned char* outCharArray)
00054 {
00055         //Writes a long LSB (least sig. byte first/leftmost) out to the char arr
00056         
00057         outCharArray[3] = (unsigned char) (inLong >> 24);
00058         outCharArray[2] = (unsigned char) ((inLong << 8) >> 24);
00059         outCharArray[1] = (unsigned char) ((inLong << 16) >> 24);
00060         outCharArray[0] = (unsigned char) ((inLong << 24) >> 24);
00061 
00062 }
00063 
00064 void iLE_Math::UShortToCharArr(unsigned short inShort, unsigned char* outCharArray) {
00065         outCharArray[0] = (unsigned char)(inShort % 256);
00066         outCharArray[1] = (unsigned char)(inShort / 256);
00067 }
00068 unsigned short iLE_Math::charArrToUShort(const unsigned char* inCharArray) {
00069         return (inCharArray[1] << 8) + inCharArray[0];
00070 }
00071 LOOG_INT64 iLE_Math::CharArrToInt64(const unsigned char* inCharArray) {
00072         LOOG_INT64 locData = 0;
00073 
00074         for (int i = 7; i >= 0; i--) {
00075                 locData <<= 8;
00076                 locData += inCharArray[i];
00077         }
00078         return locData;
00079 }
00080 
00081 void iLE_Math::Int64ToCharArr(LOOG_INT64 inInt64, unsigned char* outCharArray) {
00082         for (unsigned char i = 0; i < 8; i++) {
00083                 //This way sux !
00084                 outCharArray[i] = (unsigned char)((inInt64 << ((7 - i) * 8)) >> 56);
00085         }
00086 }

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