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Geant4/externals/clhep/src/DoubConv.cc

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Diff markup

Differences between /externals/clhep/src/DoubConv.cc (Version 11.3.0) and /externals/clhep/src/DoubConv.cc (Version 10.0.p1)


  1 // -*- C++ -*-                                 <<   1 // -*- C++ -*-
  2 // ------------------------------------------- <<   2 // $Id:$
  3 //                             HEP Random      <<   3 // -----------------------------------------------------------------------
  4 //                          --- DoubConv ---   <<   4 //                             HEP Random
  5 //                      class implementation f <<   5 //                          --- DoubConv ---
  6 // ------------------------------------------- <<   6 //                      class implementation file
  7                                                <<   7 // -----------------------------------------------------------------------
  8 #include "CLHEP/Random/DoubConv.h"             <<   8 
  9                                                <<   9 #include "CLHEP/Random/DoubConv.h"
 10 #include <sstream>                             <<  10 
 11 #include <iomanip>                             <<  11 #include <sstream>
 12 #include <vector>                              <<  12 #include <iomanip>
 13                                                <<  13 
 14 namespace CLHEP {                              <<  14 namespace CLHEP {
 15                                                <<  15 
 16 CLHEP_THREAD_LOCAL bool DoubConv::byte_order_k <<  16 bool DoubConv::byte_order_known = false;
 17 CLHEP_THREAD_LOCAL int  DoubConv::byte_order[8 <<  17 int  DoubConv::byte_order[8];
 18                                                <<  18 
 19 void DoubConv::fill_byte_order () {            <<  19 void DoubConv::fill_byte_order () {
 20   double x = 1.0;                              <<  20   double x = 1.0;
 21   int t30 = 1 << 30;                           <<  21   int t30 = 1 << 30;
 22   int t22 = 1 << 22;                           <<  22   int t22 = 1 << 22;
 23   x *= t30;                                    <<  23   x *= t30;
 24   x *= t22;                                    <<  24   x *= t22;
 25   double y = 1;                                <<  25   double y = 1;
 26   double z = 1;                                <<  26   double z = 1;
 27   x *= z;                                      <<  27   x *= z;
 28   for (int k=0; k<6; k++) {                    <<  28   for (int k=0; k<6; k++) {
 29     x += y*z;                                  <<  29     x += y*z;
 30     y += 1;                                    <<  30     y += 1;
 31     z *= 256;                                  <<  31     z *= 256;
 32   }                                            <<  32   }
 33   // x, in IEEE format, would now be 0x4330060 <<  33   // x, in IEEE format, would now be 0x4330060504030201
 34   DB8 xb;                                      <<  34   union DB8 {
 35   xb.d = x;                                    <<  35     unsigned char b[8];
 36   int n;                                       <<  36     double d;
 37   static const int UNSET = -1;                 <<  37   };
 38   for (n=0; n<8; n++) {                        <<  38   DB8 xb;
 39     byte_order[n] = UNSET;                     <<  39   xb.d = x;
 40   }                                            <<  40   int n;
 41   int order;                                   <<  41   static const int UNSET = -1; 
 42   for (n=0; n<8; n++) {                        <<  42   for (n=0; n<8; n++) {
 43     switch ( xb.b[n] ) {                       <<  43     byte_order[n] = UNSET;
 44       case 0x43:                               <<  44   }
 45         order = 0;                             <<  45   int order;
 46         break;                                 <<  46   for (n=0; n<8; n++) {
 47       case 0x30:                               <<  47     switch ( xb.b[n] ) {
 48         order = 1;                             <<  48       case 0x43:
 49         break;                                 <<  49         order = 0;
 50       case 0x06:                               <<  50         break;
 51         order = 2;                             <<  51       case 0x30:
 52         break;                                 <<  52         order = 1;
 53       case 0x05:                               <<  53         break;
 54         order = 3;                             <<  54       case 0x06:
 55         break;                                 <<  55         order = 2;
 56       case 0x04:                               <<  56         break;
 57         order = 4;                             <<  57       case 0x05:
 58         break;                                 <<  58         order = 3;
 59       case 0x03:                               <<  59         break;
 60         order = 5;                             <<  60       case 0x04:
 61         break;                                 <<  61         order = 4;
 62       case 0x02:                               <<  62         break;
 63         order = 6;                             <<  63       case 0x03:
 64         break;                                 <<  64         order = 5;
 65       case 0x01:                               <<  65         break;
 66         order = 7;                             <<  66       case 0x02:
 67         break;                                 <<  67         order = 6;
 68       default:                                 <<  68         break;
 69         throw DoubConvException(               <<  69       case 0x01:
 70     "Cannot determine byte-ordering of doubles <<  70         order = 7;
 71     }                                          <<  71         break;
 72     if (byte_order[n] != UNSET) {              <<  72       default:
 73         throw DoubConvException(               <<  73         throw DoubConvException(
 74     "Confusion in byte-ordering of doubles on  <<  74     "Cannot determine byte-ordering of doubles on this system");
 75     }                                          <<  75     } 
 76     byte_order[n] = order;                     <<  76     if (byte_order[n] != UNSET) {
 77     byte_order_known = true;                   <<  77         throw DoubConvException(
 78   }                                            <<  78     "Confusion in byte-ordering of doubles on this system");
 79   return;                                      <<  79     }    
 80 }                                              <<  80     byte_order[n] = order;
 81                                                <<  81     byte_order_known = true;
 82 std::string DoubConv::d2x(double d) {          <<  82   }
 83   if ( !byte_order_known ) fill_byte_order (); <<  83   return;
 84   DB8 db;                                      <<  84 }
 85   db.d = d;                                    <<  85 
 86   std::ostringstream ss;                       <<  86 std::string DoubConv::d2x(double d) {
 87   for (int i=0; i<8; ++i) {                    <<  87   if ( !byte_order_known ) fill_byte_order ();
 88     int k = byte_order[i];                     <<  88   DB8 db;
 89     ss << std::hex << std::setw(2) << std::set <<  89   db.d = d;
 90   }                                            <<  90   std::ostringstream ss;
 91   return ss.str();                             <<  91   for (int i=0; i<8; ++i) {
 92 }                                              <<  92     int k = byte_order[i];
 93                                                <<  93     ss << std::hex << std::setw(2) << std::setfill('0') << (int)db.b[k];
 94 std::vector<unsigned long> DoubConv::dto2longs <<  94   }
 95   std::vector<unsigned long> v(2);             <<  95   return ss.str();
 96   if ( !byte_order_known ) fill_byte_order (); <<  96 }
 97   DB8 db;                                      <<  97 
 98   db.d = d;                                    <<  98 std::vector<unsigned long> DoubConv::dto2longs(double d) {
 99   v[0] =   ((static_cast<unsigned long>(db.b[b <<  99   std::vector<unsigned long> v(2);
100          | ((static_cast<unsigned long>(db.b[b << 100   if ( !byte_order_known ) fill_byte_order ();
101          | ((static_cast<unsigned long>(db.b[b << 101   DB8 db;
102          | ((static_cast<unsigned long>(db.b[b << 102   db.d = d;
103   v[1] =   ((static_cast<unsigned long>(db.b[b << 103   v[0] =   ((static_cast<unsigned long>(db.b[byte_order[0]])) << 24)
104          | ((static_cast<unsigned long>(db.b[b << 104          | ((static_cast<unsigned long>(db.b[byte_order[1]])) << 16)
105          | ((static_cast<unsigned long>(db.b[b << 105          | ((static_cast<unsigned long>(db.b[byte_order[2]])) <<  8)
106          | ((static_cast<unsigned long>(db.b[b << 106          | ((static_cast<unsigned long>(db.b[byte_order[3]]))      );
107   return v;                                    << 107   v[1] =   ((static_cast<unsigned long>(db.b[byte_order[4]])) << 24)
108 }                                              << 108          | ((static_cast<unsigned long>(db.b[byte_order[5]])) << 16)
109                                                << 109          | ((static_cast<unsigned long>(db.b[byte_order[6]])) <<  8)
110 double DoubConv::longs2double (const std::vect << 110          | ((static_cast<unsigned long>(db.b[byte_order[7]]))      );
111   DB8 db;                                      << 111   return v; 
112   unsigned char bytes[8];                      << 112 }
113   if ( !byte_order_known ) fill_byte_order (); << 113 
114   bytes[0] = static_cast<unsigned char>((v[0]  << 114 double DoubConv::longs2double (const std::vector<unsigned long> & v) {
115   bytes[1] = static_cast<unsigned char>((v[0]  << 115   DB8 db;
116   bytes[2] = static_cast<unsigned char>((v[0]  << 116   unsigned char bytes[8];
117   bytes[3] = static_cast<unsigned char>((v[0]  << 117   if ( !byte_order_known ) fill_byte_order ();
118   bytes[4] = static_cast<unsigned char>((v[1]  << 118   bytes[0] = static_cast<unsigned char>((v[0] >> 24) & 0xFF);
119   bytes[5] = static_cast<unsigned char>((v[1]  << 119   bytes[1] = static_cast<unsigned char>((v[0] >> 16) & 0xFF);
120   bytes[6] = static_cast<unsigned char>((v[1]  << 120   bytes[2] = static_cast<unsigned char>((v[0] >>  8) & 0xFF);
121   bytes[7] = static_cast<unsigned char>((v[1]  << 121   bytes[3] = static_cast<unsigned char>((v[0]      ) & 0xFF);
122   for (int i=0; i<8; ++i) {                    << 122   bytes[4] = static_cast<unsigned char>((v[1] >> 24) & 0xFF);
123     db.b[byte_order[i]] =  bytes[i];           << 123   bytes[5] = static_cast<unsigned char>((v[1] >> 16) & 0xFF);
124   }                                            << 124   bytes[6] = static_cast<unsigned char>((v[1] >>  8) & 0xFF);
125   return db.d;                                 << 125   bytes[7] = static_cast<unsigned char>((v[1]      ) & 0xFF);
126 }                                              << 126   for (int i=0; i<8; ++i) {
127                                                << 127     db.b[byte_order[i]] =  bytes[i];
128 } // end namespace CLHEP                       << 128   }  
                                                   >> 129   return db.d;
                                                   >> 130 }
                                                   >> 131 
                                                   >> 132 } // end namespace CLHEP
129                                                   133