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bitcoin/src/uint256.h

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1// Copyright (c) 2009-2010 Satoshi Nakamoto
2// Copyright (c) 2011 The Bitcoin developers
3// Distributed under the MIT/X11 software license, see the accompanying
4// file license.txt or http://www.opensource.org/licenses/mit-license.php.
5#ifndef BITCOIN_UINT256_H
6#define BITCOIN_UINT256_H
7
8#include "serialize.h"
9
10#include <limits.h>
11#include <string>
12#include <vector>
13
14typedef long long int64;
15typedef unsigned long long uint64;
16
17inline int Testuint256AdHoc(std::vector<std::string> vArg);
18
19
20
21// We have to keep a separate base class without constructors
22// so the compiler will let us use it in a union
23template<unsigned int BITS>
24class base_uint
25{
26protected:
27 enum { WIDTH=BITS/32 };
28 unsigned int pn[WIDTH];
29public:
30
31 bool operator!() const
32 {
33 for (int i = 0; i < WIDTH; i++)
34 if (pn[i] != 0)
35 return false;
36 return true;
37 }
38
39 const base_uint operator~() const
40 {
41 base_uint ret;
42 for (int i = 0; i < WIDTH; i++)
43 ret.pn[i] = ~pn[i];
44 return ret;
45 }
46
47 const base_uint operator-() const
48 {
49 base_uint ret;
50 for (int i = 0; i < WIDTH; i++)
51 ret.pn[i] = ~pn[i];
52 ret++;
53 return ret;
54 }
55
56
57 base_uint& operator=(uint64 b)
58 {
59 pn[0] = (unsigned int)b;
60 pn[1] = (unsigned int)(b >> 32);
61 for (int i = 2; i < WIDTH; i++)
62 pn[i] = 0;
63 return *this;
64 }
65
66 base_uint& operator^=(const base_uint& b)
67 {
68 for (int i = 0; i < WIDTH; i++)
69 pn[i] ^= b.pn[i];
70 return *this;
71 }
72
73 base_uint& operator&=(const base_uint& b)
74 {
75 for (int i = 0; i < WIDTH; i++)
76 pn[i] &= b.pn[i];
77 return *this;
78 }
79
80 base_uint& operator|=(const base_uint& b)
81 {
82 for (int i = 0; i < WIDTH; i++)
83 pn[i] |= b.pn[i];
84 return *this;
85 }
86
87 base_uint& operator^=(uint64 b)
88 {
89 pn[0] ^= (unsigned int)b;
90 pn[1] ^= (unsigned int)(b >> 32);
91 return *this;
92 }
93
94 base_uint& operator|=(uint64 b)
95 {
96 pn[0] |= (unsigned int)b;
97 pn[1] |= (unsigned int)(b >> 32);
98 return *this;
99 }
100
101 base_uint& operator<<=(unsigned int shift)
102 {
103 base_uint a(*this);
104 for (int i = 0; i < WIDTH; i++)
105 pn[i] = 0;
106 int k = shift / 32;
107 shift = shift % 32;
108 for (int i = 0; i < WIDTH; i++)
109 {
110 if (i+k+1 < WIDTH && shift != 0)
111 pn[i+k+1] |= (a.pn[i] >> (32-shift));
112 if (i+k < WIDTH)
113 pn[i+k] |= (a.pn[i] << shift);
114 }
115 return *this;
116 }
117
118 base_uint& operator>>=(unsigned int shift)
119 {
120 base_uint a(*this);
121 for (int i = 0; i < WIDTH; i++)
122 pn[i] = 0;
123 int k = shift / 32;
124 shift = shift % 32;
125 for (int i = 0; i < WIDTH; i++)
126 {
127 if (i-k-1 >= 0 && shift != 0)
128 pn[i-k-1] |= (a.pn[i] << (32-shift));
129 if (i-k >= 0)
130 pn[i-k] |= (a.pn[i] >> shift);
131 }
132 return *this;
133 }
134
135 base_uint& operator+=(const base_uint& b)
136 {
137 uint64 carry = 0;
138 for (int i = 0; i < WIDTH; i++)
139 {
140 uint64 n = carry + pn[i] + b.pn[i];
141 pn[i] = n & 0xffffffff;
142 carry = n >> 32;
143 }
144 return *this;
145 }
146
147 base_uint& operator-=(const base_uint& b)
148 {
149 *this += -b;
150 return *this;
151 }
152
153 base_uint& operator+=(uint64 b64)
154 {
155 base_uint b;
156 b = b64;
157 *this += b;
158 return *this;
159 }
160
161 base_uint& operator-=(uint64 b64)
162 {
163 base_uint b;
164 b = b64;
165 *this += -b;
166 return *this;
167 }
168
169
170 base_uint& operator++()
171 {
172 // prefix operator
173 int i = 0;
174 while (++pn[i] == 0 && i < WIDTH-1)
175 i++;
176 return *this;
177 }
178
179 const base_uint operator++(int)
180 {
181 // postfix operator
182 const base_uint ret = *this;
183 ++(*this);
184 return ret;
185 }
186
187 base_uint& operator--()
188 {
189 // prefix operator
190 int i = 0;
191 while (--pn[i] == -1 && i < WIDTH-1)
192 i++;
193 return *this;
194 }
195
196 const base_uint operator--(int)
197 {
198 // postfix operator
199 const base_uint ret = *this;
200 --(*this);
201 return ret;
202 }
203
204
205 friend inline bool operator<(const base_uint& a, const base_uint& b)
206 {
207 for (int i = base_uint::WIDTH-1; i >= 0; i--)
208 {
209 if (a.pn[i] < b.pn[i])
210 return true;
211 else if (a.pn[i] > b.pn[i])
212 return false;
213 }
214 return false;
215 }
216
217 friend inline bool operator<=(const base_uint& a, const base_uint& b)
218 {
219 for (int i = base_uint::WIDTH-1; i >= 0; i--)
220 {
221 if (a.pn[i] < b.pn[i])
222 return true;
223 else if (a.pn[i] > b.pn[i])
224 return false;
225 }
226 return true;
227 }
228
229 friend inline bool operator>(const base_uint& a, const base_uint& b)
230 {
231 for (int i = base_uint::WIDTH-1; i >= 0; i--)
232 {
233 if (a.pn[i] > b.pn[i])
234 return true;
235 else if (a.pn[i] < b.pn[i])
236 return false;
237 }
238 return false;
239 }
240
241 friend inline bool operator>=(const base_uint& a, const base_uint& b)
242 {
243 for (int i = base_uint::WIDTH-1; i >= 0; i--)
244 {
245 if (a.pn[i] > b.pn[i])
246 return true;
247 else if (a.pn[i] < b.pn[i])
248 return false;
249 }
250 return true;
251 }
252
253 friend inline bool operator==(const base_uint& a, const base_uint& b)
254 {
255 for (int i = 0; i < base_uint::WIDTH; i++)
256 if (a.pn[i] != b.pn[i])
257 return false;
258 return true;
259 }
260
261 friend inline bool operator==(const base_uint& a, uint64 b)
262 {
263 if (a.pn[0] != (unsigned int)b)
264 return false;
265 if (a.pn[1] != (unsigned int)(b >> 32))
266 return false;
267 for (int i = 2; i < base_uint::WIDTH; i++)
268 if (a.pn[i] != 0)
269 return false;
270 return true;
271 }
272
273 friend inline bool operator!=(const base_uint& a, const base_uint& b)
274 {
275 return (!(a == b));
276 }
277
278 friend inline bool operator!=(const base_uint& a, uint64 b)
279 {
280 return (!(a == b));
281 }
282
283
284
285 std::string GetHex() const
286 {
287 char psz[sizeof(pn)*2 + 1];
288 for (int i = 0; i < sizeof(pn); i++)
289 sprintf(psz + i*2, "%02x", ((unsigned char*)pn)[sizeof(pn) - i - 1]);
290 return std::string(psz, psz + sizeof(pn)*2);
291 }
292
293 void SetHex(const char* psz)
294 {
295 for (int i = 0; i < WIDTH; i++)
296 pn[i] = 0;
297
298 // skip leading spaces
299 while (isspace(*psz))
300 psz++;
301
302 // skip 0x
303 if (psz[0] == '0' && tolower(psz[1]) == 'x')
304 psz += 2;
305
306 // hex string to uint
307 static char phexdigit[256] = { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,1,2,3,4,5,6,7,8,9,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0xa,0xb,0xc,0xd,0xe,0xf,0,0,0,0,0,0,0,0,0 };
308 const char* pbegin = psz;
309 while (phexdigit[*psz] || *psz == '0')
310 psz++;
311 psz--;
312 unsigned char* p1 = (unsigned char*)pn;
313 unsigned char* pend = p1 + WIDTH * 4;
314 while (psz >= pbegin && p1 < pend)
315 {
316 *p1 = phexdigit[(unsigned char)*psz--];
317 if (psz >= pbegin)
318 {
319 *p1 |= (phexdigit[(unsigned char)*psz--] << 4);
320 p1++;
321 }
322 }
323 }
324
325 void SetHex(const std::string& str)
326 {
327 SetHex(str.c_str());
328 }
329
330 std::string ToString() const
331 {
332 return (GetHex());
333 }
334
335 unsigned char* begin()
336 {
337 return (unsigned char*)&pn[0];
338 }
339
340 unsigned char* end()
341 {
342 return (unsigned char*)&pn[WIDTH];
343 }
344
345 unsigned int size()
346 {
347 return sizeof(pn);
348 }
349
350
351 unsigned int GetSerializeSize(int nType=0, int nVersion=VERSION) const
352 {
353 return sizeof(pn);
354 }
355
356 template<typename Stream>
357 void Serialize(Stream& s, int nType=0, int nVersion=VERSION) const
358 {
359 s.write((char*)pn, sizeof(pn));
360 }
361
362 template<typename Stream>
363 void Unserialize(Stream& s, int nType=0, int nVersion=VERSION)
364 {
365 s.read((char*)pn, sizeof(pn));
366 }
367
368
369 friend class uint160;
370 friend class uint256;
371 friend inline int Testuint256AdHoc(std::vector<std::string> vArg);
372};
373
374typedef base_uint<160> base_uint160;
375typedef base_uint<256> base_uint256;
376
377
378
379//
380// uint160 and uint256 could be implemented as templates, but to keep
381// compile errors and debugging cleaner, they're copy and pasted.
382//
383
384
385
386//////////////////////////////////////////////////////////////////////////////
387//
388// uint160
389//
390
391class uint160 : public base_uint160
392{
393public:
394 typedef base_uint160 basetype;
395
396 uint160()
397 {
398 for (int i = 0; i < WIDTH; i++)
399 pn[i] = 0;
400 }
401
402 uint160(const basetype& b)
403 {
404 for (int i = 0; i < WIDTH; i++)
405 pn[i] = b.pn[i];
406 }
407
408 uint160& operator=(const basetype& b)
409 {
410 for (int i = 0; i < WIDTH; i++)
411 pn[i] = b.pn[i];
412 return *this;
413 }
414
415 uint160(uint64 b)
416 {
417 pn[0] = (unsigned int)b;
418 pn[1] = (unsigned int)(b >> 32);
419 for (int i = 2; i < WIDTH; i++)
420 pn[i] = 0;
421 }
422
423 uint160& operator=(uint64 b)
424 {
425 pn[0] = (unsigned int)b;
426 pn[1] = (unsigned int)(b >> 32);
427 for (int i = 2; i < WIDTH; i++)
428 pn[i] = 0;
429 return *this;
430 }
431
432 explicit uint160(const std::string& str)
433 {
434 SetHex(str);
435 }
436
437 explicit uint160(const std::vector<unsigned char>& vch)
438 {
439 if (vch.size() == sizeof(pn))
440 memcpy(pn, &vch[0], sizeof(pn));
441 else
442 *this = 0;
443 }
444};
445
446inline bool operator==(const uint160& a, uint64 b) { return (base_uint160)a == b; }
447inline bool operator!=(const uint160& a, uint64 b) { return (base_uint160)a != b; }
448inline const uint160 operator<<(const base_uint160& a, unsigned int shift) { return uint160(a) <<= shift; }
449inline const uint160 operator>>(const base_uint160& a, unsigned int shift) { return uint160(a) >>= shift; }
450inline const uint160 operator<<(const uint160& a, unsigned int shift) { return uint160(a) <<= shift; }
451inline const uint160 operator>>(const uint160& a, unsigned int shift) { return uint160(a) >>= shift; }
452
453inline const uint160 operator^(const base_uint160& a, const base_uint160& b) { return uint160(a) ^= b; }
454inline const uint160 operator&(const base_uint160& a, const base_uint160& b) { return uint160(a) &= b; }
455inline const uint160 operator|(const base_uint160& a, const base_uint160& b) { return uint160(a) |= b; }
456inline const uint160 operator+(const base_uint160& a, const base_uint160& b) { return uint160(a) += b; }
457inline const uint160 operator-(const base_uint160& a, const base_uint160& b) { return uint160(a) -= b; }
458
459inline bool operator<(const base_uint160& a, const uint160& b) { return (base_uint160)a < (base_uint160)b; }
460inline bool operator<=(const base_uint160& a, const uint160& b) { return (base_uint160)a <= (base_uint160)b; }
461inline bool operator>(const base_uint160& a, const uint160& b) { return (base_uint160)a > (base_uint160)b; }
462inline bool operator>=(const base_uint160& a, const uint160& b) { return (base_uint160)a >= (base_uint160)b; }
463inline bool operator==(const base_uint160& a, const uint160& b) { return (base_uint160)a == (base_uint160)b; }
464inline bool operator!=(const base_uint160& a, const uint160& b) { return (base_uint160)a != (base_uint160)b; }
465inline const uint160 operator^(const base_uint160& a, const uint160& b) { return (base_uint160)a ^ (base_uint160)b; }
466inline const uint160 operator&(const base_uint160& a, const uint160& b) { return (base_uint160)a & (base_uint160)b; }
467inline const uint160 operator|(const base_uint160& a, const uint160& b) { return (base_uint160)a | (base_uint160)b; }
468inline const uint160 operator+(const base_uint160& a, const uint160& b) { return (base_uint160)a + (base_uint160)b; }
469inline const uint160 operator-(const base_uint160& a, const uint160& b) { return (base_uint160)a - (base_uint160)b; }
470
471inline bool operator<(const uint160& a, const base_uint160& b) { return (base_uint160)a < (base_uint160)b; }
472inline bool operator<=(const uint160& a, const base_uint160& b) { return (base_uint160)a <= (base_uint160)b; }
473inline bool operator>(const uint160& a, const base_uint160& b) { return (base_uint160)a > (base_uint160)b; }
474inline bool operator>=(const uint160& a, const base_uint160& b) { return (base_uint160)a >= (base_uint160)b; }
475inline bool operator==(const uint160& a, const base_uint160& b) { return (base_uint160)a == (base_uint160)b; }
476inline bool operator!=(const uint160& a, const base_uint160& b) { return (base_uint160)a != (base_uint160)b; }
477inline const uint160 operator^(const uint160& a, const base_uint160& b) { return (base_uint160)a ^ (base_uint160)b; }
478inline const uint160 operator&(const uint160& a, const base_uint160& b) { return (base_uint160)a & (base_uint160)b; }
479inline const uint160 operator|(const uint160& a, const base_uint160& b) { return (base_uint160)a | (base_uint160)b; }
480inline const uint160 operator+(const uint160& a, const base_uint160& b) { return (base_uint160)a + (base_uint160)b; }
481inline const uint160 operator-(const uint160& a, const base_uint160& b) { return (base_uint160)a - (base_uint160)b; }
482
483inline bool operator<(const uint160& a, const uint160& b) { return (base_uint160)a < (base_uint160)b; }
484inline bool operator<=(const uint160& a, const uint160& b) { return (base_uint160)a <= (base_uint160)b; }
485inline bool operator>(const uint160& a, const uint160& b) { return (base_uint160)a > (base_uint160)b; }
486inline bool operator>=(const uint160& a, const uint160& b) { return (base_uint160)a >= (base_uint160)b; }
487inline bool operator==(const uint160& a, const uint160& b) { return (base_uint160)a == (base_uint160)b; }
488inline bool operator!=(const uint160& a, const uint160& b) { return (base_uint160)a != (base_uint160)b; }
489inline const uint160 operator^(const uint160& a, const uint160& b) { return (base_uint160)a ^ (base_uint160)b; }
490inline const uint160 operator&(const uint160& a, const uint160& b) { return (base_uint160)a & (base_uint160)b; }
491inline const uint160 operator|(const uint160& a, const uint160& b) { return (base_uint160)a | (base_uint160)b; }
492inline const uint160 operator+(const uint160& a, const uint160& b) { return (base_uint160)a + (base_uint160)b; }
493inline const uint160 operator-(const uint160& a, const uint160& b) { return (base_uint160)a - (base_uint160)b; }
494
495
496
497
498
499
500//////////////////////////////////////////////////////////////////////////////
501//
502// uint256
503//
504
505class uint256 : public base_uint256
506{
507public:
508 typedef base_uint256 basetype;
509
510 uint256()
511 {
512 for (int i = 0; i < WIDTH; i++)
513 pn[i] = 0;
514 }
515
516 uint256(const basetype& b)
517 {
518 for (int i = 0; i < WIDTH; i++)
519 pn[i] = b.pn[i];
520 }
521
522 uint256& operator=(const basetype& b)
523 {
524 for (int i = 0; i < WIDTH; i++)
525 pn[i] = b.pn[i];
526 return *this;
527 }
528
529 uint256(uint64 b)
530 {
531 pn[0] = (unsigned int)b;
532 pn[1] = (unsigned int)(b >> 32);
533 for (int i = 2; i < WIDTH; i++)
534 pn[i] = 0;
535 }
536
537 uint256& operator=(uint64 b)
538 {
539 pn[0] = (unsigned int)b;
540 pn[1] = (unsigned int)(b >> 32);
541 for (int i = 2; i < WIDTH; i++)
542 pn[i] = 0;
543 return *this;
544 }
545
546 explicit uint256(const std::string& str)
547 {
548 SetHex(str);
549 }
550
551 explicit uint256(const std::vector<unsigned char>& vch)
552 {
553 if (vch.size() == sizeof(pn))
554 memcpy(pn, &vch[0], sizeof(pn));
555 else
556 *this = 0;
557 }
558};
559
560inline bool operator==(const uint256& a, uint64 b) { return (base_uint256)a == b; }
561inline bool operator!=(const uint256& a, uint64 b) { return (base_uint256)a != b; }
562inline const uint256 operator<<(const base_uint256& a, unsigned int shift) { return uint256(a) <<= shift; }
563inline const uint256 operator>>(const base_uint256& a, unsigned int shift) { return uint256(a) >>= shift; }
564inline const uint256 operator<<(const uint256& a, unsigned int shift) { return uint256(a) <<= shift; }
565inline const uint256 operator>>(const uint256& a, unsigned int shift) { return uint256(a) >>= shift; }
566
567inline const uint256 operator^(const base_uint256& a, const base_uint256& b) { return uint256(a) ^= b; }
568inline const uint256 operator&(const base_uint256& a, const base_uint256& b) { return uint256(a) &= b; }
569inline const uint256 operator|(const base_uint256& a, const base_uint256& b) { return uint256(a) |= b; }
570inline const uint256 operator+(const base_uint256& a, const base_uint256& b) { return uint256(a) += b; }
571inline const uint256 operator-(const base_uint256& a, const base_uint256& b) { return uint256(a) -= b; }
572
573inline bool operator<(const base_uint256& a, const uint256& b) { return (base_uint256)a < (base_uint256)b; }
574inline bool operator<=(const base_uint256& a, const uint256& b) { return (base_uint256)a <= (base_uint256)b; }
575inline bool operator>(const base_uint256& a, const uint256& b) { return (base_uint256)a > (base_uint256)b; }
576inline bool operator>=(const base_uint256& a, const uint256& b) { return (base_uint256)a >= (base_uint256)b; }
577inline bool operator==(const base_uint256& a, const uint256& b) { return (base_uint256)a == (base_uint256)b; }
578inline bool operator!=(const base_uint256& a, const uint256& b) { return (base_uint256)a != (base_uint256)b; }
579inline const uint256 operator^(const base_uint256& a, const uint256& b) { return (base_uint256)a ^ (base_uint256)b; }
580inline const uint256 operator&(const base_uint256& a, const uint256& b) { return (base_uint256)a & (base_uint256)b; }
581inline const uint256 operator|(const base_uint256& a, const uint256& b) { return (base_uint256)a | (base_uint256)b; }
582inline const uint256 operator+(const base_uint256& a, const uint256& b) { return (base_uint256)a + (base_uint256)b; }
583inline const uint256 operator-(const base_uint256& a, const uint256& b) { return (base_uint256)a - (base_uint256)b; }
584
585inline bool operator<(const uint256& a, const base_uint256& b) { return (base_uint256)a < (base_uint256)b; }
586inline bool operator<=(const uint256& a, const base_uint256& b) { return (base_uint256)a <= (base_uint256)b; }
587inline bool operator>(const uint256& a, const base_uint256& b) { return (base_uint256)a > (base_uint256)b; }
588inline bool operator>=(const uint256& a, const base_uint256& b) { return (base_uint256)a >= (base_uint256)b; }
589inline bool operator==(const uint256& a, const base_uint256& b) { return (base_uint256)a == (base_uint256)b; }
590inline bool operator!=(const uint256& a, const base_uint256& b) { return (base_uint256)a != (base_uint256)b; }
591inline const uint256 operator^(const uint256& a, const base_uint256& b) { return (base_uint256)a ^ (base_uint256)b; }
592inline const uint256 operator&(const uint256& a, const base_uint256& b) { return (base_uint256)a & (base_uint256)b; }
593inline const uint256 operator|(const uint256& a, const base_uint256& b) { return (base_uint256)a | (base_uint256)b; }
594inline const uint256 operator+(const uint256& a, const base_uint256& b) { return (base_uint256)a + (base_uint256)b; }
595inline const uint256 operator-(const uint256& a, const base_uint256& b) { return (base_uint256)a - (base_uint256)b; }
596
597inline bool operator<(const uint256& a, const uint256& b) { return (base_uint256)a < (base_uint256)b; }
598inline bool operator<=(const uint256& a, const uint256& b) { return (base_uint256)a <= (base_uint256)b; }
599inline bool operator>(const uint256& a, const uint256& b) { return (base_uint256)a > (base_uint256)b; }
600inline bool operator>=(const uint256& a, const uint256& b) { return (base_uint256)a >= (base_uint256)b; }
601inline bool operator==(const uint256& a, const uint256& b) { return (base_uint256)a == (base_uint256)b; }
602inline bool operator!=(const uint256& a, const uint256& b) { return (base_uint256)a != (base_uint256)b; }
603inline const uint256 operator^(const uint256& a, const uint256& b) { return (base_uint256)a ^ (base_uint256)b; }
604inline const uint256 operator&(const uint256& a, const uint256& b) { return (base_uint256)a & (base_uint256)b; }
605inline const uint256 operator|(const uint256& a, const uint256& b) { return (base_uint256)a | (base_uint256)b; }
606inline const uint256 operator+(const uint256& a, const uint256& b) { return (base_uint256)a + (base_uint256)b; }
607inline const uint256 operator-(const uint256& a, const uint256& b) { return (base_uint256)a - (base_uint256)b; }
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619
620inline int Testuint256AdHoc(std::vector<std::string> vArg)
621{
622 uint256 g(0);
623
624
625 printf("%s\n", g.ToString().c_str());
626 g--; printf("g--\n");
627 printf("%s\n", g.ToString().c_str());
628 g--; printf("g--\n");
629 printf("%s\n", g.ToString().c_str());
630 g++; printf("g++\n");
631 printf("%s\n", g.ToString().c_str());
632 g++; printf("g++\n");
633 printf("%s\n", g.ToString().c_str());
634 g++; printf("g++\n");
635 printf("%s\n", g.ToString().c_str());
636 g++; printf("g++\n");
637 printf("%s\n", g.ToString().c_str());
638
639
640
641 uint256 a(7);
642 printf("a=7\n");
643 printf("%s\n", a.ToString().c_str());
644
645 uint256 b;
646 printf("b undefined\n");
647 printf("%s\n", b.ToString().c_str());
648 int c = 3;
649
650 a = c;
651 a.pn[3] = 15;
652 printf("%s\n", a.ToString().c_str());
653 uint256 k(c);
654
655 a = 5;
656 a.pn[3] = 15;
657 printf("%s\n", a.ToString().c_str());
658 b = 1;
659 b <<= 52;
660
661 a |= b;
662
663 a ^= 0x500;
664
665 printf("a %s\n", a.ToString().c_str());
666
667 a = a | b | (uint256)0x1000;
668
669
670 printf("a %s\n", a.ToString().c_str());
671 printf("b %s\n", b.ToString().c_str());
672
673 a = 0xfffffffe;
674 a.pn[4] = 9;
675
676 printf("%s\n", a.ToString().c_str());
677 a++;
678 printf("%s\n", a.ToString().c_str());
679 a++;
680 printf("%s\n", a.ToString().c_str());
681 a++;
682 printf("%s\n", a.ToString().c_str());
683 a++;
684 printf("%s\n", a.ToString().c_str());
685
686 a--;
687 printf("%s\n", a.ToString().c_str());
688 a--;
689 printf("%s\n", a.ToString().c_str());
690 a--;
691 printf("%s\n", a.ToString().c_str());
692 uint256 d = a--;
693 printf("%s\n", d.ToString().c_str());
694 printf("%s\n", a.ToString().c_str());
695 a--;
696 printf("%s\n", a.ToString().c_str());
697 a--;
698 printf("%s\n", a.ToString().c_str());
699
700 d = a;
701
702 printf("%s\n", d.ToString().c_str());
703 for (int i = uint256::WIDTH-1; i >= 0; i--) printf("%08x", d.pn[i]); printf("\n");
704
705 uint256 neg = d;
706 neg = ~neg;
707 printf("%s\n", neg.ToString().c_str());
708
709
710 uint256 e = uint256("0xABCDEF123abcdef12345678909832180000011111111");
711 printf("\n");
712 printf("%s\n", e.ToString().c_str());
713
714
715 printf("\n");
716 uint256 x1 = uint256("0xABCDEF123abcdef12345678909832180000011111111");
717 uint256 x2;
718 printf("%s\n", x1.ToString().c_str());
719 for (int i = 0; i < 270; i += 4)
720 {
721 x2 = x1 << i;
722 printf("%s\n", x2.ToString().c_str());
723 }
724
725 printf("\n");
726 printf("%s\n", x1.ToString().c_str());
727 for (int i = 0; i < 270; i += 4)
728 {
729 x2 = x1;
730 x2 >>= i;
731 printf("%s\n", x2.ToString().c_str());
732 }
733
734
735 for (int i = 0; i < 100; i++)
736 {
737 uint256 k = (~uint256(0) >> i);
738 printf("%s\n", k.ToString().c_str());
739 }
740
741 for (int i = 0; i < 100; i++)
742 {
743 uint256 k = (~uint256(0) << i);
744 printf("%s\n", k.ToString().c_str());
745 }
746
747 return (0);
748}
749
750#endif