src/integer/conv/cl_I_to_UQ.cc

   1 // cl_I_to_UQ().
   2
   3 // General includes.
   4 #include "cl_sysdep.h"
   5
   6 // Specification.
   7 #include "cl_I.h"
   8
   9
  10 // Implementation.
  11
  12 #ifdef intQsize
  13
  14 #include "cln/number.h"
  15 #include "cl_DS.h"
  16 #include "cln/io.h"
  17 #include "cln/integer_io.h"
  18 #include "cln/abort.h"
  19
  20 namespace cln {
  21
  22 uint64 cl_I_to_UQ (const cl_I& obj)
  23 {
  24         if (fixnump(obj)) {
  25                 // Fixnum
  26                 var sint32 wert = FN_to_L(obj);
  27                 if (wert >= 0)
  28                         return (uint64)(uint32)wert;
  29                 goto bad;
  30         } else { // Bignum
  31                 var cl_heap_bignum* bn = TheBignum(obj);
  32                 var uintC len = bn->length;
  33                 if ((sintD)mspref(arrayMSDptr(bn->data,len),0) < 0)
  34                         goto bad;
  35                 #define IF_LENGTH(i)  \
  36                   if (bn_minlength <= i) /* genau i Digits überhaupt möglich? */\
  37                     if (len == i) /* genau i Digits? */                         \
  38                       /* 2^((i-1)*intDsize-1) <= obj < 2^(i*intDsize-1) */      \
  39                       if ( (i*intDsize-1 > 64)                                  \
  40                            && ( ((i-1)*intDsize-1 >= 64)                        \
  41                                 || (mspref(arrayMSDptr(bn->data,len),0) >= (uintD)bitc(64-(i-1)*intDsize)) \
  42                          )    )                                                 \
  43                         goto bad;                                               \
  44                         else
  45                 #if (intDsize==64)
  46                 IF_LENGTH(1)
  47                         return (uint64)arrayLSref(bn->data,1,0);
  48                 IF_LENGTH(2)
  49                         return (uint64)arrayLSref(bn->data,2,0);
  50                 #endif
  51                 #if (intDsize==32)
  52                 IF_LENGTH(1)
  53                         return (uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,1));
  54                 IF_LENGTH(2)
  55                         return ((uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,2) lspop 1) << 32) | (uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,2));
  56                 IF_LENGTH(3)
  57                         return ((uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,3) lspop 1) << 32) | (uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,3));
  58                 #endif
  59                 #if (intDsize==16)
  60                 IF_LENGTH(1)
  61                         return (uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,1));
  62                 IF_LENGTH(2)
  63                         return (uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,2));
  64                 IF_LENGTH(3)
  65                         return ((uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,3) lspop 2) << 32) | (uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,3));
  66                 IF_LENGTH(4)
  67                         return ((uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,4) lspop 2) << 32) | (uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,4));
  68                 IF_LENGTH(5)
  69                         return ((uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,5) lspop 2) << 32) | (uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,5));
  70                 #endif
  71                 #if (intDsize==8)
  72                 IF_LENGTH(1)
  73                         return (uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,1));
  74                 IF_LENGTH(2)
  75                         return (uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,2));
  76                 IF_LENGTH(3)
  77                         return (uint64)get_uint3D_Dptr(arrayLSDptr(bn->data,3));
  78                 IF_LENGTH(4)
  79                         return (uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,4));
  80                 IF_LENGTH(5)
  81                         return ((uint64)get_uint1D_Dptr(arrayLSDptr(bn->data,5) lspop 4) << 32) | (uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,5));
  82                 IF_LENGTH(6)
  83                         return ((uint64)get_uint2D_Dptr(arrayLSDptr(bn->data,6) lspop 4) << 32) | (uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,6));
  84                 IF_LENGTH(7)
  85                         return ((uint64)get_uint3D_Dptr(arrayLSDptr(bn->data,7) lspop 4) << 32) | (uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,7));
  86                 IF_LENGTH(8)
  87                         return ((uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,8) lspop 4) << 32) | (uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,8));
  88                 IF_LENGTH(9)
  89                         return ((uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,9) lspop 4) << 32) | (uint64)get_uint4D_Dptr(arrayLSDptr(bn->data,9));
  90                 #endif
  91                 #undef IF_LENGTH
  92         }
  93         bad: // unpassendes Objekt
  94         fprint(std::cerr, "Not a 64-bit integer: ");
  95         fprint(std::cerr, obj);
  96         fprint(std::cerr, "\n");
  97         cl_abort();
  98 }
  99
 100 }  // namespace cln
 101
 102 #endif