include/cln/number.h

   1 // Basic definitions of numbers
   2
   3
   4 #ifndef _CL_NUMBER_H
   5 #define _CL_NUMBER_H
   6
   7
   8 #include "cln/object.h"
   9 #include "cln/malloc.h"
  10
  11 // Type hierachy:
  12 // Number (N) =
  13 //    Real (R) =
  14 //       Float (F) =
  15 //          Short float (SF)
  16 //          Single float (FF)
  17 //          Double float (DF)
  18 //          Long float (LF)
  19 //       Rational (RA) =
  20 //          Integer (I) =
  21 //             Fixnum (FN)
  22 //             Bignum (BN)
  23 //          Ratio (RT)
  24 //    Complex (C)
  25
  26 // Constructors and assignment operators from C numeric types.
  27
  28 #define CL_DEFINE_INT_CONSTRUCTOR(_class_,_type_)  \
  29 inline _class_::_class_ (const _type_ wert)                             \
  30 {                                                                       \
  31         word = cl_combine(cl_FN_tag,wert);                              \
  32 }
  33 #define CL_DEFINE_INT_CONSTRUCTORS(_class_)  \
  34 CL_DEFINE_INT_CONSTRUCTOR(_class_, int)                                 \
  35 CL_DEFINE_INT_CONSTRUCTOR(_class_, unsigned int)
  36
  37 #define CL_DEFINE_INT_ASSIGNMENT_OPERATOR(_class_,_type_)  \
  38 inline _class_& _class_::operator= (const _type_ wert)                  \
  39 {                                                                       \
  40         cl_dec_refcount(*this);                                         \
  41         word = cl_combine(cl_FN_tag,wert);                              \
  42         return *this;                                                   \
  43 }
  44 #define CL_DEFINE_INT_ASSIGNMENT_OPERATORS(_class_)  \
  45 CL_DEFINE_INT_ASSIGNMENT_OPERATOR(_class_, int)                         \
  46 CL_DEFINE_INT_ASSIGNMENT_OPERATOR(_class_, unsigned int)
  47
  48 #if (long_bitsize==32)
  49 // `long' == `sintL', `unsigned long' == `uintL'.
  50 #define CL_DEFINE_LONG_CONSTRUCTORS(_class_)  \
  51 inline _class_::_class_ (const long wert)                               \
  52 {                                                                       \
  53         extern cl_private_thing cl_I_constructor_from_L (sint32 wert);  \
  54         pointer = cl_I_constructor_from_L(wert);                        \
  55 }                                                                       \
  56 inline _class_::_class_ (const unsigned long wert)                      \
  57 {                                                                       \
  58         extern cl_private_thing cl_I_constructor_from_UL (uint32 wert); \
  59         pointer = cl_I_constructor_from_UL(wert);                       \
  60 }
  61 #elif (long_bitsize==64)
  62 // `long' == `sintQ', `unsigned long' == `uintQ'.
  63 #define CL_DEFINE_LONG_CONSTRUCTORS(_class_)  \
  64 inline _class_::_class_ (const long wert)                               \
  65 {                                                                       \
  66         extern cl_private_thing cl_I_constructor_from_Q (sint64 wert);  \
  67         pointer = cl_I_constructor_from_Q(wert);                        \
  68 }                                                                       \
  69 inline _class_::_class_ (const unsigned long wert)                      \
  70 {                                                                       \
  71         extern cl_private_thing cl_I_constructor_from_UQ (uint64 wert); \
  72         pointer = cl_I_constructor_from_UQ(wert);                       \
  73 }
  74 #endif
  75
  76 #if (long_bitsize==32)
  77 // `long' == `sintL', `unsigned long' == `uintL'.
  78 #define CL_DEFINE_LONG_ASSIGNMENT_OPERATORS(_class_)  \
  79 inline _class_& _class_::operator= (const long wert)                    \
  80 {                                                                       \
  81         extern cl_private_thing cl_I_constructor_from_L (sint32 wert);  \
  82         cl_dec_refcount(*this);                                         \
  83         pointer = cl_I_constructor_from_L(wert);                        \
  84         return *this;                                                   \
  85 }                                                                       \
  86 inline _class_& _class_::operator= (const unsigned long wert)           \
  87 {                                                                       \
  88         extern cl_private_thing cl_I_constructor_from_UL (uint32 wert); \
  89         cl_dec_refcount(*this);                                         \
  90         pointer = cl_I_constructor_from_UL(wert);                       \
  91         return *this;                                                   \
  92 }
  93 #elif (long_bitsize==64)
  94 // `long' == `sintQ', `unsigned long' == `uintQ'.
  95 #define CL_DEFINE_LONG_ASSIGNMENT_OPERATORS(_class_)  \
  96 inline _class_& _class_::operator= (const long wert)                    \
  97 {                                                                       \
  98         extern cl_private_thing cl_I_constructor_from_Q (sint64 wert);  \
  99         cl_dec_refcount(*this);                                         \
 100         pointer = cl_I_constructor_from_Q(wert);                        \
 101         return *this;                                                   \
 102 }                                                                       \
 103 inline _class_& _class_::operator= (const unsigned long wert)           \
 104 {                                                                       \
 105         extern cl_private_thing cl_I_constructor_from_UQ (uint64 wert); \
 106         cl_dec_refcount(*this);                                         \
 107         pointer = cl_I_constructor_from_UQ(wert);                       \
 108         return *this;                                                   \
 109 }
 110 #endif
 111
 112
 113 namespace cln {
 114
 115 // Constructors and assignment operators from C numeric types.
 116
 117 // from `float':
 118 union ffloatjanus;
 119 extern cl_private_thing cl_float_to_FF_pointer (const union ffloatjanus& val);
 120
 121 #define CL_DEFINE_FLOAT_CONSTRUCTOR(_class_)                            \
 122 inline _class_ :: _class_ (const float x)                               \
 123 {                                                                       \
 124         pointer = cl_float_to_FF_pointer(*(const union ffloatjanus *)&x); \
 125 }                                                                       \
 126 inline _class_& _class_::operator= (const float x)                      \
 127 {                                                                       \
 128         cl_dec_refcount(*this);                                         \
 129         pointer = cl_float_to_FF_pointer(*(const union ffloatjanus *)&x); \
 130         return *this;                                                   \
 131 }
 132
 133 // from `double':
 134 union dfloatjanus;
 135 extern struct cl_heap_dfloat * cl_double_to_DF_pointer (const union dfloatjanus& val);
 136
 137 #define CL_DEFINE_DOUBLE_CONSTRUCTOR(_class_)                           \
 138 inline _class_::_class_ (const double x)                                \
 139 {                                                                       \
 140         pointer = cl_double_to_DF_pointer(*(const union dfloatjanus *)&x); \
 141 }                                                                       \
 142 inline _class_& _class_::operator= (const double x)                     \
 143 {                                                                       \
 144         cl_dec_refcount(*this);                                         \
 145         pointer = cl_double_to_DF_pointer(*(const union dfloatjanus *)&x); \
 146         return *this;                                                   \
 147 }
 148
 149
 150 // Abstract class of all numbers.
 151
 152 class cl_number : public cl_gcobject {
 153 public:
 154 // Default constructor. (Used for objects with no initializer.)
 155         cl_number ();
 156 // Copy constructor. (Used for function argument passing and function
 157 // return value, and of course for objects with initializers of the same type.)
 158         cl_number (const cl_number& x);
 159 // Converters. (Used for function argument passing and function return values.)
 160 // Assignment operators. (Used for assignments.)
 161         cl_number& operator= (const cl_number&);
 162 // Constructors and assignment operators from C numeric types.
 163         cl_number (const int);          // |argument| must be < 2^29
 164         cl_number (const unsigned int); // argument must be < 2^29
 165         cl_number (const long);
 166         cl_number (const unsigned long);
 167         cl_number (const float);
 168         cl_number (const double);
 169         cl_number& operator= (const int);       // |argument| must be < 2^29
 170         cl_number& operator= (const unsigned int); // argument must be < 2^29
 171         cl_number& operator= (const long);
 172         cl_number& operator= (const unsigned long);
 173         cl_number& operator= (const float);
 174         cl_number& operator= (const double);
 175 // Other constructors.
 176 //      cl_number (const char *);
 177 // Private pointer manipulations.
 178         cl_number (cl_private_thing);
 179 };
 180
 181 // Private constructors.
 182 inline cl_number::cl_number (cl_private_thing ptr) : cl_gcobject (ptr) {}
 183 // The assignment operators:
 184 CL_DEFINE_ASSIGNMENT_OPERATOR(cl_number, cl_number)
 185 // The default constructors.
 186 inline cl_number::cl_number ()
 187         : cl_gcobject ((cl_private_thing) cl_combine(cl_FN_tag,0)) {}
 188 // The copy constructors.
 189 CL_DEFINE_COPY_CONSTRUCTOR2(cl_number,cl_gcobject)
 190 // Constructors and assignment operators from C numeric types.
 191 CL_DEFINE_INT_CONSTRUCTORS(cl_number)
 192 CL_DEFINE_INT_ASSIGNMENT_OPERATORS(cl_number)
 193 CL_DEFINE_LONG_CONSTRUCTORS(cl_number)
 194 CL_DEFINE_LONG_ASSIGNMENT_OPERATORS(cl_number)
 195 CL_DEFINE_FLOAT_CONSTRUCTOR(cl_number)
 196 CL_DEFINE_DOUBLE_CONSTRUCTOR(cl_number)
 197
 198
 199 // Hack section.
 200
 201 // Conversions to subtypes without checking, template version:
 202 // the<cl_I>(x) converts x to a cl_I, without change of representation.
 203 template<class type>
 204 inline const type& the(const cl_number& x)
 205 {
 206         // check that sizeof(type)==sizeof(cl_number)
 207         typedef int assertion1 [1 - 2 * (sizeof(type) != sizeof(cl_number))];
 208         return *(const type *) &x;
 209 }
 210 // Conversions to subtypes without checking, macro version:
 211 // The(cl_I)(x) converts x to a cl_I, without change of representation.
 212   #define The(type)  *(const type *) & cl_identity
 213 // This inline function is for type checking purposes only.
 214   inline const cl_number& cl_identity (const cl_number& x) { return x; }
 215
 216 }  // namespace cln
 217
 218
 219 // Conversions to subtypes:
 220 // As(cl_I)(x) returns x as a cl_I. It first checks that x is a cl_I
 221 // and then returns it without change of representation.
 222 #if 0 // no debug information
 223   #define As(type)  type##_As
 224   #define CL_DEFINE_AS_CONVERSION(_class_)                              \
 225     extern const _class_& _class_##_As (const cl_number& x);            \
 226     inline const _class_& _class_##_As (const _class_& x) { return x; }
 227 #else // Line number information for ease of debugging.
 228   #define As(type)  type##_As cl_as_aux
 229   #define cl_as_aux(expr)  (expr,__FILE__,__LINE__)
 230   #define CL_DEFINE_AS_CONVERSION(_class_)                              \
 231     extern const _class_& _class_##_As (const cl_number& x, const char * filename, int line); \
 232     inline const _class_& _class_##_As (const _class_& x, const char * filename, int line) { (void)filename; (void)line; return x; }
 233 #endif
 234
 235 // Mutable(type,x);
 236 // x should be a variable `const type x' or `const type& x'.
 237 // This macro introduces a new variable `type& x' whose value can be
 238 // modified. Useful for modifying the argument of a function which takes
 239 // a `const type &x'.
 240 // Warning: To apply this to a function's formal parameter, a block { ... }
 241 // must be inserted.
 242   #define Mutable(type,x)  \
 243     type __copied_##x = x;                                              \
 244     type& x = __copied_##x;
 245
 246 // DeclareType(type,x);
 247 // x should be a variable of some subtype of `cl_number'. type should be
 248 // a subtype of `cl_number'. A new variable of the given type is declared,
 249 // with name x and which refers to x (by reference, with const attribute).
 250   #define DeclareType(type,x)  \
 251     const type& __tmp_##x = *(const type*) &x;                          \
 252     const type& x = __tmp_##x;
 253
 254 #endif /* _CL_NUMBER_H */