Utils.h

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00001 // ZenLib::Utils - Very small utilities
00002 // Copyright (C) 2002-2006 Jerome Martinez, Zen@MediaArea.net
00003 //
00004 // This software is provided 'as-is', without any express or implied
00005 // warranty.  In no event will the authors be held liable for any damages
00006 // arising from the use of this software.
00007 //
00008 // Permission is granted to anyone to use this software for any purpose,
00009 // including commercial applications, and to alter it and redistribute it
00010 // freely, subject to the following restrictions:
00011 //
00012 // 1. The origin of this software must not be misrepresented; you must not
00013 //    claim that you wrote the original software. If you use this software
00014 //    in a product, an acknowledgment in the product documentation would be
00015 //    appreciated but is not required.
00016 // 2. Altered source versions must be plainly marked as such, and must not be
00017 //    misrepresented as being the original software.
00018 // 3. This notice may not be removed or altered from any source distribution.
00019 //
00020 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00021 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00022 //
00023 // Integer and float manipulation
00024 //
00025 //+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
00026 
00027 //---------------------------------------------------------------------------
00028 #ifndef ZenUtilsH
00029 #define ZenUtilsH
00030 //---------------------------------------------------------------------------
00031 
00032 //---------------------------------------------------------------------------
00033 #include "ZenLib/Conf.h"
00034 #include "ZenLib/int128u.h"
00035 //---------------------------------------------------------------------------
00036 
00037 namespace ZenLib
00038 {
00039 
00040 //***************************************************************************
00041 // Integer transformations
00042 //***************************************************************************
00043 
00044 //---------------------------------------------------------------------------
00045 //Little Endians
00046 int8s  LittleEndian2int8s  (const char* List);
00047 int8u  LittleEndian2int8u  (const char* List);
00048 int16s LittleEndian2int16s (const char* List);
00049 int16u LittleEndian2int16u (const char* List);
00050 int32s LittleEndian2int24s (const char* List);
00051 int32u LittleEndian2int24u (const char* List);
00052 int32s LittleEndian2int32s (const char* List);
00053 int32u LittleEndian2int32u (const char* List);
00054 #if (MAXTYPE_INT >= 64)
00055 int64s LittleEndian2int40s (const char* List);
00056 int64u LittleEndian2int40u (const char* List);
00057 int64s LittleEndian2int48s (const char* List);
00058 int64u LittleEndian2int48u (const char* List);
00059 int64s LittleEndian2int56s (const char* List);
00060 int64u LittleEndian2int56u (const char* List);
00061 int64s LittleEndian2int64s (const char* List);
00062 int64u LittleEndian2int64u (const char* List);
00063 int128u LittleEndian2int128u (const char* List);
00064 #endif
00065 float32 LittleEndian2float32 (const char* List);
00066 float64 LittleEndian2float64 (const char* List);
00067 float80 LittleEndian2float80 (const char* List);
00068 
00069 #ifndef __BORLANDC__
00070 inline int8s  LittleEndian2int8s  (const int8u* List) {return LittleEndian2int8s  ((const char*)List);}
00071 inline int8u  LittleEndian2int8u  (const int8u* List) {return LittleEndian2int8u  ((const char*)List);}
00072 inline int16s LittleEndian2int16s (const int8u* List) {return LittleEndian2int16s ((const char*)List);}
00073 inline int16u LittleEndian2int16u (const int8u* List) {return LittleEndian2int16u ((const char*)List);}
00074 inline int32s LittleEndian2int24s (const int8u* List) {return LittleEndian2int24s ((const char*)List);}
00075 inline int32u LittleEndian2int24u (const int8u* List) {return LittleEndian2int24u ((const char*)List);}
00076 inline int32s LittleEndian2int32s (const int8u* List) {return LittleEndian2int32s ((const char*)List);}
00077 inline int32u LittleEndian2int32u (const int8u* List) {return LittleEndian2int32u ((const char*)List);}
00078 #if (MAXTYPE_INT >= 64)
00079 inline int64s LittleEndian2int40s (const int8u* List) {return LittleEndian2int40s ((const char*)List);}
00080 inline int64u LittleEndian2int40u (const int8u* List) {return LittleEndian2int40u ((const char*)List);}
00081 inline int64s LittleEndian2int48s (const int8u* List) {return LittleEndian2int48s ((const char*)List);}
00082 inline int64u LittleEndian2int48u (const int8u* List) {return LittleEndian2int48u ((const char*)List);}
00083 inline int64s LittleEndian2int56s (const int8u* List) {return LittleEndian2int56s ((const char*)List);}
00084 inline int64u LittleEndian2int56u (const int8u* List) {return LittleEndian2int56u ((const char*)List);}
00085 inline int64s LittleEndian2int64s (const int8u* List) {return LittleEndian2int64s ((const char*)List);}
00086 inline int64u LittleEndian2int64u (const int8u* List) {return LittleEndian2int64u ((const char*)List);}
00087 inline int128u LittleEndian2int128u (const int8u* List) {return LittleEndian2int64u ((const char*)List);}
00088 inline float32 LittleEndian2float32 (const int8u* List) {return LittleEndian2float32 ((const char*)List);}
00089 inline float64 LittleEndian2float64 (const int8u* List) {return LittleEndian2float64 ((const char*)List);}
00090 inline float80 LittleEndian2float80 (const int8u* List) {return LittleEndian2float80 ((const char*)List);}
00091 #endif
00092 #endif //__BORLANDC__
00093 //---------------------------------------------------------------------------
00094 //Big Endians
00095 int8s  BigEndian2int8s     (const char* List);
00096 int8u  BigEndian2int8u     (const char* List);
00097 int16s BigEndian2int16s    (const char* List);
00098 int16u BigEndian2int16u    (const char* List);
00099 int32s BigEndian2int24s    (const char* List);
00100 int32u BigEndian2int24u    (const char* List);
00101 int32s BigEndian2int32s    (const char* List);
00102 int32u BigEndian2int32u    (const char* List);
00103 #if (MAXTYPE_INT >= 64)
00104 int64s BigEndian2int40s    (const char* List);
00105 int64u BigEndian2int40u    (const char* List);
00106 int64s BigEndian2int48s    (const char* List);
00107 int64u BigEndian2int48u    (const char* List);
00108 int64s BigEndian2int56s    (const char* List);
00109 int64u BigEndian2int56u    (const char* List);
00110 int64s BigEndian2int64s    (const char* List);
00111 int64u BigEndian2int64u    (const char* List);
00112 int128u BigEndian2int128u  (const char* List);
00113 #endif
00114 float32 BigEndian2float32  (const char* List);
00115 float64 BigEndian2float64  (const char* List);
00116 float80 BigEndian2float80  (const char* List);
00117 #ifndef __BORLANDC__
00118 inline int8s  BigEndian2int8s     (const int8u* List) {return BigEndian2int8s     ((const char*)List);}
00119 inline int8u  BigEndian2int8u     (const int8u* List) {return BigEndian2int8u     ((const char*)List);}
00120 inline int16s BigEndian2int16s    (const int8u* List) {return BigEndian2int16s    ((const char*)List);}
00121 inline int16u BigEndian2int16u    (const int8u* List) {return BigEndian2int16u    ((const char*)List);}
00122 inline int32s BigEndian2int32s    (const int8u* List) {return BigEndian2int32s    ((const char*)List);}
00123 inline int32u BigEndian2int24u    (const int8u* List) {return BigEndian2int24u    ((const char*)List);}
00124 inline int32s BigEndian2int24s    (const int8u* List) {return BigEndian2int24s    ((const char*)List);}
00125 inline int32u BigEndian2int32u    (const int8u* List) {return BigEndian2int32u    ((const char*)List);}
00126 #if (MAXTYPE_INT >= 64)
00127 inline int64s BigEndian2int40s    (const int8u* List) {return BigEndian2int40s    ((const char*)List);}
00128 inline int64u BigEndian2int40u    (const int8u* List) {return BigEndian2int40u    ((const char*)List);}
00129 inline int64s BigEndian2int48s    (const int8u* List) {return BigEndian2int48s    ((const char*)List);}
00130 inline int64u BigEndian2int48u    (const int8u* List) {return BigEndian2int48u    ((const char*)List);}
00131 inline int64s BigEndian2int56s    (const int8u* List) {return BigEndian2int56s    ((const char*)List);}
00132 inline int64u BigEndian2int56u    (const int8u* List) {return BigEndian2int56u    ((const char*)List);}
00133 inline int64s BigEndian2int64s    (const int8u* List) {return BigEndian2int64s    ((const char*)List);}
00134 inline int64u BigEndian2int64u    (const int8u* List) {return BigEndian2int64u    ((const char*)List);}
00135 inline int128u BigEndian2int128u  (const int8u* List) {return BigEndian2int64u    ((const char*)List);}
00136 #endif
00137 inline float32 BigEndian2float32  (const int8u* List) {return BigEndian2float32   ((const char*)List);}
00138 inline float64 BigEndian2float64  (const int8u* List) {return BigEndian2float64   ((const char*)List);}
00139 inline float80 BigEndian2float80  (const int8u* List) {return BigEndian2float80   ((const char*)List);}
00140 #endif //__BORLANDC__
00141 
00142 //---------------------------------------------------------------------------
00143 // int32 - int64
00144 int64s int32s_int64s (                int32s  High, int32u  Low);
00145 int64u int32u_int64u (                int32u  High, int32u  Low);
00146 void   int32s_int64s (int64s &BigInt, int32s  High, int32u  Low);
00147 void   int32u_int64u (int64s &BigInt, int32u  High, int32u  Low);
00148 void   int64s_int32s (int64s  BigInt, int32s &High, int32u &Low);
00149 void   int64u_int32u (int64u  BigInt, int32u &High, int32u &Low);
00150 
00151 //---------------------------------------------------------------------------
00152 // Floats and ints
00153 int32s float32_int32s  (float32 F, bool Rounded=true);
00154 int64s float32_int64s  (float32 F, bool Rounded=true);
00155 int32s float64_int32s  (float64 F, bool Rounded=true);
00156 int64s float64_int64s  (float64 F, bool Rounded=true);
00157 
00158 // These functions are used because MSVC6 isn't able to convert an unsigned int64 to a floating-point value, and I couldn't think of a cleaner way to handle it.
00159 #if defined(_MSC_VER) && _MSC_VER<=1200
00160     inline float32 int64u_float32 (int64u v) {return static_cast<float32>(static_cast<int64s>(v>>1))*2.0f + static_cast<float32>(static_cast<int64s>(v & 1));}
00161     inline float64 int64u_float64 (int64u v) {return static_cast<float64>(static_cast<int64s>(v>>1))*2.0f + static_cast<float32>(static_cast<int64s>(v & 1));}
00162 #else
00163     #if defined(_MSC_VER)
00164        #pragma warning( disable : 4244 )
00165     #endif
00166     inline float32 int64u_float32 (int64u v) {return v;}
00167     inline float64 int64u_float64 (int64u v) {return v;}
00168     #if defined(_MSC_VER)
00169         #pragma warning( default : 4244 )
00170     #endif
00171 #endif // defined(_MSC_VER) && _MSC_VER<=1200
00172 
00173 //---------------------------------------------------------------------------
00174 // CC (often used in all containers to identify a stream
00175 inline int64u CC8(const char*  C) {return BigEndian2int64u(C);}
00176 inline int64u CC7(const char*  C) {return BigEndian2int56u(C);}
00177 inline int64u CC6(const char*  C) {return BigEndian2int48u(C);}
00178 inline int64u CC5(const char*  C) {return BigEndian2int40u(C);}
00179 inline int32u CC4(const char*  C) {return BigEndian2int32u(C);}
00180 inline int32u CC3(const char*  C) {return BigEndian2int24u(C);}
00181 inline int16u CC2(const char*  C) {return BigEndian2int16u(C);}
00182 inline int8u  CC1(const char*  C) {return BigEndian2int8u (C);}
00183 #ifndef __BORLANDC__
00184 inline int64u CC8(const int8u* C) {return BigEndian2int64u(C);}
00185 inline int64u CC7(const int8u* C) {return BigEndian2int56u(C);}
00186 inline int64u CC6(const int8u* C) {return BigEndian2int48u(C);}
00187 inline int64u CC5(const int8u* C) {return BigEndian2int40u(C);}
00188 inline int32u CC4(const int8u* C) {return BigEndian2int32u(C);}
00189 inline int32u CC3(const int8u* C) {return BigEndian2int24u(C);}
00190 inline int16u CC2(const int8u* C) {return BigEndian2int16u(C);}
00191 inline int8u  CC1(const int8u* C) {return BigEndian2int8u (C);}
00192 #endif // __BORLANDC__
00193 
00194 //---------------------------------------------------------------------------
00195 // turn a numeric literal into a hex constant
00196 // (avoids problems with leading zeroes)
00197 // 8-bit constants max value 0x11111111, always fits in unsigned long
00198 #define HEX__(n) 0x##n##LU
00199 
00200 // 8-bit conversion function
00201 #define B8__(x) ((x&0x0000000FLU)?0x01:0) \
00202                +((x&0x000000F0LU)?0x02:0) \
00203                +((x&0x00000F00LU)?0x04:0) \
00204                +((x&0x0000F000LU)?0x08:0) \
00205                +((x&0x000F0000LU)?0x10:0) \
00206                +((x&0x00F00000LU)?0x20:0) \
00207                +((x&0x0F000000LU)?0x40:0) \
00208                +((x&0xF0000000LU)?0x80:0)
00209 
00210 // for upto 8-bit binary constants
00211 #define B8(d) ((int8u)B8__(HEX__(d)))
00212 
00213 // for upto 16-bit binary constants, MSB first
00214 #define B16(dmsb, dlsb) (((int16u)B8(dmsb)<<8) \
00215                        + ((int16u)B8(dlsb)<<0))
00216 
00217 // for upto 32-bit binary constants, MSB first
00218 #define B32(dmsb, db2, db3, dlsb) (((int32u)B8(dmsb)<<24) \
00219                                  + ((int32u)B8( db2)<<16) \
00220                                  + ((int32u)B8( db3)<< 8) \
00221                                  + ((int32u)B8(dlsb)<< 0))
00222 
00223 } //namespace ZenLib
00224 #endif

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