ByteUtilities.hpp

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//
// File:
//   $HeadURL: https://hpctoolkit.googlecode.com/svn/branches/hpctoolkit-hpcserver/src/tool/hpcserver/ByteUtilities.hpp $
//
// Purpose:
//   [The purpose of this file]
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// Description:
//   [The set of functions, macros, etc. defined in the file]
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#ifndef BYTEUTILITIES_H_
#define BYTEUTILITIES_H_

#include <stdint.h>

namespace TraceviewerServer
{
        typedef int64_t Long;
        class ByteUtilities
        {
        public:

                static short readShort(char* buffer)
                {
                        unsigned char* uBuffer = (unsigned char*) buffer;
                        return (uBuffer[0] << 8)| (uBuffer[1]);
                }

                static int readInt(char* buffer)
                {
                        unsigned char* uBuffer = (unsigned char*) buffer;
                        return ((uBuffer[0] << 24) | (uBuffer[1] << 16) | (uBuffer[2] << 8)
                                        | (uBuffer[3]));
                }
                static int64_t readLong(char* buffer)
                {
                        unsigned int highWord = readInt(buffer);
                        unsigned int lowWord = readInt(buffer + 4);
                        uint64_t combined = (((uint64_t) highWord) << 32) | lowWord;
                        return combined;
                }

                static void writeShort(char* buffer, short ToWrite)
                {
                        unsigned short utoWrite = ToWrite;
                        buffer[0] = (utoWrite & MASK_1) >> 8;
                        buffer[1] = utoWrite & MASK_0;
                }

                static void writeInt(char* buffer, int ToWrite)
                {
                        unsigned int utoWrite = ToWrite;

                        buffer[0] = (utoWrite & MASK_3) >> 24;
                        buffer[1] = (utoWrite & MASK_2) >> 16;
                        buffer[2] = (utoWrite & MASK_1) >> 8;
                        buffer[3] = utoWrite & MASK_0;
                }
                static void writeLong(char* buffer, int64_t ToWrite)
                {
                        uint64_t utoWrite = ToWrite;
                        buffer[0] = (utoWrite & MASK_7) >> 56;
                        buffer[1] = (utoWrite & MASK_6) >> 48;
                        buffer[2] = (utoWrite & MASK_5) >> 40;
                        buffer[3] = (utoWrite & MASK_4) >> 32;
                        buffer[4] = (utoWrite & MASK_3) >> 24;
                        buffer[5] = (utoWrite & MASK_2) >> 16;
                        buffer[6] = (utoWrite & MASK_1) >> 8;
                        buffer[7] = utoWrite & MASK_0;
                }
                static Long convertDoubleToLong(double d)
                {
                        union { double d; Long l;} dbLgConv;
                        dbLgConv.d = d;
                        return dbLgConv.l;
                }
                static double convertLongToDouble(Long l)
                {
                        union { double d; Long l;} dbLgConv;
                        dbLgConv.l = l;
                        return dbLgConv.d;
                }
        private:
                static const unsigned int MASK_0 = 0x000000FF, MASK_1 = 0x0000FF00, MASK_2 =
                                0x00FF0000, MASK_3 = 0xFF000000; //For an int
                static const uint64_t MASK_4 = 0x000000FF00000000ULL,
                                MASK_5 = 0x0000FF0000000000ULL, MASK_6 = 0x00FF000000000000ULL, MASK_7 =
                                                0xFF00000000000000ULL; //for a long
        };

} /* namespace TraceviewerServer */
#endif /* BYTEUTILITIES_H_ */