include/wx/longlong.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/longlong.h
   3 // Purpose:     declaration of wxLongLong class - best implementation of a 64
   4 //              bit integer for the current platform.
   5 // Author:      Jeffrey C. Ollie <jeff@ollie.clive.ia.us>, Vadim Zeitlin
   6 // Modified by:
   7 // Created:     10.02.99
   8 // RCS-ID:      $Id$
   9 // Copyright:   (c) 1998 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
  10 // Licence:     wxWindows license
  11 /////////////////////////////////////////////////////////////////////////////
  12
  13 #ifndef _WX_LONGLONG_H
  14 #define _WX_LONGLONG_H
  15
  16 #ifdef __GNUG__
  17     #pragma interface "longlong.h"
  18 #endif
  19
  20 #include "wx/defs.h"
  21 #include "wx/string.h"
  22
  23 #include <limits.h>     // for LONG_MAX
  24
  25 // define this to compile wxLongLongWx in "test" mode: the results of all
  26 // calculations will be compared with the real results taken from
  27 // wxLongLongNative -- this is extremely useful to find the bugs in
  28 // wxLongLongWx class!
  29
  30 // #define wxLONGLONG_TEST_MODE
  31
  32 #ifdef wxLONGLONG_TEST_MODE
  33     #define wxUSE_LONGLONG_WX 1
  34     #define wxUSE_LONGLONG_NATIVE 1
  35 #endif // wxLONGLONG_TEST_MODE
  36
  37 // ----------------------------------------------------------------------------
  38 // decide upon which class we will use
  39 // ----------------------------------------------------------------------------
  40
  41 // to avoid compilation problems on 64bit machines with ambiguous method calls
  42 // we will need to define this
  43 #undef wxLongLongIsLong
  44
  45 // NB: we #define and not typedef wxLongLong_t because we want to be able to
  46 //     use 'unsigned wxLongLong_t' as well and because we use "#ifdef
  47 //     wxLongLong_t" below
  48
  49 // first check for generic cases which are long on 64bit machine and "long
  50 // long", then check for specific compilers
  51 #if defined(SIZEOF_LONG) && (SIZEOF_LONG == 8)
  52     #define wxLongLong_t long
  53     #define wxLongLongIsLong
  54 #elif defined(SIZEOF_LONG_LONG) && SIZEOF_LONG_LONG >= 8
  55     #define wxLongLong_t long long
  56 #elif (defined(__VISUALC__) && defined(__WIN32__)) || defined( __VMS__ )
  57     #define wxLongLong_t __int64
  58 #elif defined(__BORLANDC__) && defined(__WIN32__) && (__BORLANDC__ >= 0x520)
  59     #define wxLongLong_t __int64
  60 #elif defined(__MINGW32__)
  61     #define wxLongLong_t long long
  62 #elif defined(__MWERKS__)
  63     #if __option(longlong)
  64         #define wxLongLong_t long long
  65     #else
  66         #error "The 64 bit integer support in CodeWarrior has been disabled."
  67         #error "See the documentation on the 'longlong' pragma."
  68     #endif
  69 #elif defined(__VISAGECPP__) && __IBMCPP__ >= 400
  70         #define wxLongLong_t long long
  71 #else // no native long long type
  72     // both warning and pragma warning are not portable, but at least an
  73     // unknown pragma should never be an error - except that, actually, some
  74     // broken compilers don't like it, so we have to disable it in this case
  75     // <sigh>
  76 #if !(defined(__WATCOMC__) || defined(__VISAGECPP__))
  77     #pragma warning "Your compiler does not appear to support 64 bit "\
  78                     "integers, using emulation class instead.\n" \
  79                     "Please report your compiler version to " \
  80                     "wx-dev@lists.wxwindows.org!"
  81 #endif
  82
  83     #define wxUSE_LONGLONG_WX 1
  84 #endif // compiler
  85
  86 // the user may predefine wxUSE_LONGLONG_NATIVE and/or wxUSE_LONGLONG_NATIVE
  87 // to disable automatic testing (useful for the test program which defines
  88 // both classes) but by default we only use one class
  89 #if (defined(wxUSE_LONGLONG_WX) && wxUSE_LONGLONG_WX) || !defined(wxLongLong_t)
  90     // don't use both classes unless wxUSE_LONGLONG_NATIVE was explicitly set:
  91     // this is useful in test programs and only there
  92     #ifndef wxUSE_LONGLONG_NATIVE
  93         #define wxUSE_LONGLONG_NATIVE 0
  94     #endif
  95
  96     class WXDLLEXPORT wxLongLongWx;
  97 #if defined(__VISUALC__) && !defined(__WIN32__)
  98     #define wxLongLong wxLongLongWx
  99 #else
 100     typedef wxLongLongWx wxLongLong;
 101 #endif
 102
 103 #else
 104     // if nothing is defined, use native implementation by default, of course
 105     #ifndef wxUSE_LONGLONG_NATIVE
 106         #define wxUSE_LONGLONG_NATIVE 1
 107     #endif
 108 #endif
 109
 110 #ifndef wxUSE_LONGLONG_WX
 111     #define wxUSE_LONGLONG_WX 0
 112     class WXDLLEXPORT wxLongLongNative;
 113     typedef wxLongLongNative wxLongLong;
 114 #endif
 115
 116 // NB: if both wxUSE_LONGLONG_WX and NATIVE are defined, the user code should
 117 //     typedef wxLongLong as it wants, we don't do it
 118
 119 // ----------------------------------------------------------------------------
 120 // choose the appropriate class
 121 // ----------------------------------------------------------------------------
 122
 123 // we use iostream for wxLongLong output
 124 #include "wx/ioswrap.h"
 125
 126 #if wxUSE_LONGLONG_NATIVE
 127
 128 class WXDLLEXPORT wxLongLongNative
 129 {
 130 public:
 131     // ctors
 132         // default ctor initializes to 0
 133     wxLongLongNative() { m_ll = 0; }
 134         // from long long
 135     wxLongLongNative(wxLongLong_t ll) { m_ll = ll; }
 136         // from 2 longs
 137     wxLongLongNative(long hi, unsigned long lo)
 138     {
 139         // assign first to avoid precision loss!
 140         m_ll = ((wxLongLong_t) hi) << 32;
 141         m_ll |= (wxLongLong_t) lo;
 142     }
 143
 144     // default copy ctor is ok
 145
 146     // no dtor
 147
 148     // assignment operators
 149         // from native 64 bit integer
 150     wxLongLongNative& operator=(wxLongLong_t ll)
 151         { m_ll = ll; return *this; }
 152
 153         // from double: this one has an explicit name because otherwise we
 154         // would have ambiguity with "ll = int" and also because we don't want
 155         // to have implicit conversions between doubles and wxLongLongs
 156     wxLongLongNative& Assign(double d)
 157         { m_ll = (wxLongLong_t)d; return *this; }
 158
 159     // assignment operators from wxLongLongNative is ok
 160
 161     // accessors
 162         // get high part
 163     long GetHi() const
 164         { return (long)(m_ll >> 32); }
 165         // get low part
 166     unsigned long GetLo() const
 167         { return (unsigned long)m_ll; }
 168
 169         // get absolute value
 170     wxLongLongNative Abs() const { return wxLongLongNative(*this).Abs(); }
 171     wxLongLongNative& Abs() { if ( m_ll < 0 ) m_ll = -m_ll; return *this; }
 172
 173         // convert to native long long
 174     wxLongLong_t GetValue() const { return m_ll; }
 175
 176         // convert to long with range checking in the debug mode (only!)
 177     long ToLong() const
 178     {
 179         wxASSERT_MSG( (m_ll >= LONG_MIN) && (m_ll <= LONG_MAX),
 180                       _T("wxLongLong to long conversion loss of precision") );
 181
 182         return (long)m_ll;
 183     }
 184
 185     // don't provide implicit conversion to wxLongLong_t or we will have an
 186     // ambiguity for all arithmetic operations
 187     //operator wxLongLong_t() const { return m_ll; }
 188
 189     // operations
 190         // addition
 191     wxLongLongNative operator+(const wxLongLongNative& ll) const
 192         { return wxLongLongNative(m_ll + ll.m_ll); }
 193     wxLongLongNative& operator+=(const wxLongLongNative& ll)
 194         { m_ll += ll.m_ll; return *this; }
 195
 196     wxLongLongNative operator+(const wxLongLong_t ll) const
 197         { return wxLongLongNative(m_ll + ll); }
 198     wxLongLongNative& operator+=(const wxLongLong_t ll)
 199         { m_ll += ll; return *this; }
 200
 201         // pre increment
 202     wxLongLongNative& operator++()
 203         { m_ll++; return *this; }
 204
 205         // post increment
 206     wxLongLongNative& operator++(int)
 207         { m_ll++; return *this; }
 208
 209         // negation operator
 210     wxLongLongNative operator-() const
 211         { return wxLongLongNative(-m_ll); }
 212     wxLongLongNative& Negate() { m_ll = -m_ll; return *this; }
 213
 214         // subtraction
 215     wxLongLongNative operator-(const wxLongLongNative& ll) const
 216         { return wxLongLongNative(m_ll - ll.m_ll); }
 217     wxLongLongNative& operator-=(const wxLongLongNative& ll)
 218         { m_ll -= ll.m_ll; return *this; }
 219
 220     wxLongLongNative operator-(const wxLongLong_t ll) const
 221         { return wxLongLongNative(m_ll - ll); }
 222     wxLongLongNative& operator-=(const wxLongLong_t ll)
 223         { m_ll -= ll; return *this; }
 224
 225         // pre decrement
 226     wxLongLongNative& operator--()
 227         { m_ll--; return *this; }
 228
 229         // post decrement
 230     wxLongLongNative& operator--(int)
 231         { m_ll--; return *this; }
 232
 233     // shifts
 234         // left shift
 235     wxLongLongNative operator<<(int shift) const
 236         { return wxLongLongNative(m_ll << shift);; }
 237     wxLongLongNative& operator<<=(int shift)
 238         { m_ll <<= shift; return *this; }
 239
 240         // right shift
 241     wxLongLongNative operator>>(int shift) const
 242         { return wxLongLongNative(m_ll >> shift);; }
 243     wxLongLongNative& operator>>=(int shift)
 244         { m_ll >>= shift; return *this; }
 245
 246     // bitwise operators
 247     wxLongLongNative operator&(const wxLongLongNative& ll) const
 248         { return wxLongLongNative(m_ll & ll.m_ll); }
 249     wxLongLongNative& operator&=(const wxLongLongNative& ll)
 250         { m_ll &= ll.m_ll; return *this; }
 251
 252     wxLongLongNative operator|(const wxLongLongNative& ll) const
 253         { return wxLongLongNative(m_ll | ll.m_ll); }
 254     wxLongLongNative& operator|=(const wxLongLongNative& ll)
 255         { m_ll |= ll.m_ll; return *this; }
 256
 257     wxLongLongNative operator^(const wxLongLongNative& ll) const
 258         { return wxLongLongNative(m_ll ^ ll.m_ll); }
 259     wxLongLongNative& operator^=(const wxLongLongNative& ll)
 260         { m_ll ^= ll.m_ll; return *this; }
 261
 262     // multiplication/division
 263     wxLongLongNative operator*(const wxLongLongNative& ll) const
 264         { return wxLongLongNative(m_ll * ll.m_ll); }
 265     wxLongLongNative operator*(long l) const
 266         { return wxLongLongNative(m_ll * l); }
 267     wxLongLongNative& operator*=(const wxLongLongNative& ll)
 268         { m_ll *= ll.m_ll; return *this; }
 269     wxLongLongNative& operator*=(long l)
 270         { m_ll *= l; return *this; }
 271
 272     wxLongLongNative operator/(const wxLongLongNative& ll) const
 273         { return wxLongLongNative(m_ll / ll.m_ll); }
 274     wxLongLongNative operator/(long l) const
 275         { return wxLongLongNative(m_ll / l); }
 276     wxLongLongNative& operator/=(const wxLongLongNative& ll)
 277         { m_ll /= ll.m_ll; return *this; }
 278     wxLongLongNative& operator/=(long l)
 279         { m_ll /= l; return *this; }
 280
 281     wxLongLongNative operator%(const wxLongLongNative& ll) const
 282         { return wxLongLongNative(m_ll % ll.m_ll); }
 283     wxLongLongNative operator%(long l) const
 284         { return wxLongLongNative(m_ll % l); }
 285
 286     // comparison
 287     bool operator==(const wxLongLongNative& ll) const
 288         { return m_ll == ll.m_ll; }
 289     bool operator==(long l) const
 290         { return m_ll == l; }
 291     bool operator!=(const wxLongLongNative& ll) const
 292         { return m_ll != ll.m_ll; }
 293     bool operator!=(long l) const
 294         { return m_ll != l; }
 295     bool operator<(const wxLongLongNative& ll) const
 296         { return m_ll < ll.m_ll; }
 297     bool operator<(long l) const
 298         { return m_ll < l; }
 299     bool operator>(const wxLongLongNative& ll) const
 300         { return m_ll > ll.m_ll; }
 301     bool operator>(long l) const
 302         { return m_ll > l; }
 303     bool operator<=(const wxLongLongNative& ll) const
 304         { return m_ll <= ll.m_ll; }
 305     bool operator<=(long l) const
 306         { return m_ll <= l; }
 307     bool operator>=(const wxLongLongNative& ll) const
 308         { return m_ll >= ll.m_ll; }
 309     bool operator>=(long l) const
 310         { return m_ll >= l; }
 311
 312     // miscellaneous
 313
 314         // return the string representation of this number
 315     wxString ToString() const;
 316
 317         // conversion to byte array: returns a pointer to static buffer!
 318     void *asArray() const;
 319
 320 #if wxUSE_STD_IOSTREAM
 321         // input/output
 322     friend wxSTD ostream& operator<<(wxSTD ostream&, const wxLongLongNative&);
 323 #endif
 324
 325 private:
 326     wxLongLong_t  m_ll;
 327 };
 328
 329 #endif // wxUSE_LONGLONG_NATIVE
 330
 331 #if wxUSE_LONGLONG_WX
 332
 333 class WXDLLEXPORT wxLongLongWx
 334 {
 335 public:
 336     // ctors
 337         // default ctor initializes to 0
 338     wxLongLongWx()
 339     {
 340         m_lo = m_hi = 0;
 341
 342 #ifdef wxLONGLONG_TEST_MODE
 343         m_ll = 0;
 344
 345         Check();
 346 #endif // wxLONGLONG_TEST_MODE
 347     }
 348         // from long
 349     wxLongLongWx(long l) { *this = l; }
 350         // from 2 longs
 351     wxLongLongWx(long hi, unsigned long lo)
 352     {
 353         m_hi = hi;
 354         m_lo = lo;
 355
 356 #ifdef wxLONGLONG_TEST_MODE
 357         m_ll = hi;
 358         m_ll <<= 32;
 359         m_ll |= lo;
 360
 361         Check();
 362 #endif // wxLONGLONG_TEST_MODE
 363     }
 364
 365     // default copy ctor is ok in both cases
 366
 367     // no dtor
 368
 369     // assignment operators
 370         // from long
 371     wxLongLongWx& operator=(long l)
 372     {
 373         m_lo = l;
 374         m_hi = (l < 0 ? -1l : 0l);
 375
 376 #ifdef wxLONGLONG_TEST_MODE
 377         m_ll = l;
 378
 379         Check();
 380 #endif // wxLONGLONG_TEST_MODE
 381
 382         return *this;
 383     }
 384         // from double
 385     wxLongLongWx& Assign(double d);
 386         // can't have assignment operator from 2 longs
 387
 388     // accessors
 389         // get high part
 390     long GetHi() const { return m_hi; }
 391         // get low part
 392     unsigned long GetLo() const { return m_lo; }
 393
 394         // get absolute value
 395     wxLongLongWx Abs() const { return wxLongLongWx(*this).Abs(); }
 396     wxLongLongWx& Abs()
 397     {
 398         if ( m_hi < 0 )
 399             m_hi = -m_hi;
 400
 401 #ifdef wxLONGLONG_TEST_MODE
 402         if ( m_ll < 0 )
 403             m_ll = -m_ll;
 404
 405         Check();
 406 #endif // wxLONGLONG_TEST_MODE
 407
 408         return *this;
 409     }
 410
 411         // convert to long with range checking in the debug mode (only!)
 412     long ToLong() const
 413     {
 414         wxASSERT_MSG( (m_hi == 0l) || (m_hi == -1l),
 415                       _T("wxLongLong to long conversion loss of precision") );
 416
 417         return (long)m_lo;
 418     }
 419
 420     // operations
 421         // addition
 422     wxLongLongWx operator+(const wxLongLongWx& ll) const;
 423     wxLongLongWx& operator+=(const wxLongLongWx& ll);
 424     wxLongLongWx operator+(long l) const;
 425     wxLongLongWx& operator+=(long l);
 426
 427         // pre increment operator
 428     wxLongLongWx& operator++();
 429
 430         // post increment operator
 431     wxLongLongWx& operator++(int) { return ++(*this); }
 432
 433         // negation operator
 434     wxLongLongWx operator-() const;
 435     wxLongLongWx& Negate();
 436
 437         // subraction
 438     wxLongLongWx operator-(const wxLongLongWx& ll) const;
 439     wxLongLongWx& operator-=(const wxLongLongWx& ll);
 440
 441         // pre decrement operator
 442     wxLongLongWx& operator--();
 443
 444         // post decrement operator
 445     wxLongLongWx& operator--(int) { return --(*this); }
 446
 447     // shifts
 448         // left shift
 449     wxLongLongWx operator<<(int shift) const;
 450     wxLongLongWx& operator<<=(int shift);
 451
 452         // right shift
 453     wxLongLongWx operator>>(int shift) const;
 454     wxLongLongWx& operator>>=(int shift);
 455
 456     // bitwise operators
 457     wxLongLongWx operator&(const wxLongLongWx& ll) const;
 458     wxLongLongWx& operator&=(const wxLongLongWx& ll);
 459     wxLongLongWx operator|(const wxLongLongWx& ll) const;
 460     wxLongLongWx& operator|=(const wxLongLongWx& ll);
 461     wxLongLongWx operator^(const wxLongLongWx& ll) const;
 462     wxLongLongWx& operator^=(const wxLongLongWx& ll);
 463     wxLongLongWx operator~() const;
 464
 465     // comparison
 466     bool operator==(const wxLongLongWx& ll) const
 467         { return m_lo == ll.m_lo && m_hi == ll.m_hi; }
 468     bool operator!=(const wxLongLongWx& ll) const
 469         { return !(*this == ll); }
 470     bool operator<(const wxLongLongWx& ll) const;
 471     bool operator>(const wxLongLongWx& ll) const;
 472     bool operator<=(const wxLongLongWx& ll) const
 473         { return *this < ll || *this == ll; }
 474     bool operator>=(const wxLongLongWx& ll) const
 475         { return *this > ll || *this == ll; }
 476
 477     bool operator<(long l) const { return *this < wxLongLongWx(l); }
 478     bool operator>(long l) const { return *this > wxLongLongWx(l); }
 479     bool operator==(long l) const
 480     {
 481         return l >= 0 ? (m_hi == 0 && m_lo == (unsigned long)l)
 482                       : (m_hi == -1 && m_lo == (unsigned long)l);
 483     }
 484
 485     bool operator<=(long l) const { return *this < l || *this == l; }
 486     bool operator>=(long l) const { return *this > l || *this == l; }
 487
 488     // multiplication
 489     wxLongLongWx operator*(const wxLongLongWx& ll) const;
 490     wxLongLongWx& operator*=(const wxLongLongWx& ll);
 491
 492     // division
 493     wxLongLongWx operator/(const wxLongLongWx& ll) const;
 494     wxLongLongWx& operator/=(const wxLongLongWx& ll);
 495
 496     wxLongLongWx operator%(const wxLongLongWx& ll) const;
 497
 498     void Divide(const wxLongLongWx& divisor,
 499                 wxLongLongWx& quotient,
 500                 wxLongLongWx& remainder) const;
 501
 502     // input/output
 503
 504     // return the string representation of this number
 505     wxString ToString() const;
 506
 507     void *asArray() const;
 508
 509 #if wxUSE_STD_IOSTREAM
 510     friend wxSTD ostream& operator<<(wxSTD ostream&, const wxLongLongWx&);
 511 #endif // wxUSE_STD_IOSTREAM
 512
 513 private:
 514     // long is at least 32 bits, so represent our 64bit number as 2 longs
 515
 516     long m_hi;                // signed bit is in the high part
 517     unsigned long m_lo;
 518
 519 #ifdef wxLONGLONG_TEST_MODE
 520     void Check()
 521     {
 522         wxASSERT( (m_ll >> 32) == m_hi && (unsigned long)m_ll == m_lo );
 523     }
 524
 525     wxLongLong_t m_ll;
 526 #endif // wxLONGLONG_TEST_MODE
 527 };
 528
 529 #endif // wxUSE_LONGLONG_WX
 530
 531 // ----------------------------------------------------------------------------
 532 // binary operators
 533 // ----------------------------------------------------------------------------
 534
 535 inline bool operator<(long l, const wxLongLong& ll) { return ll > l; }
 536 inline bool operator>(long l, const wxLongLong& ll) { return ll > l; }
 537 inline bool operator<=(long l, const wxLongLong& ll) { return ll > l; }
 538 inline bool operator>=(long l, const wxLongLong& ll) { return ll > l; }
 539 inline bool operator==(long l, const wxLongLong& ll) { return ll > l; }
 540 inline bool operator!=(long l, const wxLongLong& ll) { return ll > l; }
 541
 542 inline wxLongLong operator+(long l, const wxLongLong& ll) { return ll + l; }
 543 inline wxLongLong operator-(long l, const wxLongLong& ll) { return ll - l; }
 544
 545 #endif // _WX_LONGLONG_H