util.h

   1 // Copyright (c) 2009-2010 Satoshi Nakamoto
   2 // Distributed under the MIT/X11 software license, see the accompanying
   3 // file license.txt or http://www.opensource.org/licenses/mit-license.php.
   4
   5
   6 #if defined(_MSC_VER) || defined(__BORLANDC__)
   7 typedef __int64  int64;
   8 typedef unsigned __int64  uint64;
   9 #else
  10 typedef long long  int64;
  11 typedef unsigned long long  uint64;
  12 #endif
  13 #if defined(_MSC_VER) && _MSC_VER < 1300
  14 #define for  if (false) ; else for
  15 #endif
  16 #ifndef _MSC_VER
  17 #define __forceinline  inline
  18 #endif
  19
  20 #define foreach             BOOST_FOREACH
  21 #define loop                for (;;)
  22 #define BEGIN(a)            ((char*)&(a))
  23 #define END(a)              ((char*)&((&(a))[1]))
  24 #define UBEGIN(a)           ((unsigned char*)&(a))
  25 #define UEND(a)             ((unsigned char*)&((&(a))[1]))
  26 #define ARRAYLEN(array)     (sizeof(array)/sizeof((array)[0]))
  27 #define printf              OutputDebugStringF
  28
  29 #ifdef snprintf
  30 #undef snprintf
  31 #endif
  32 #define snprintf my_snprintf
  33
  34 #ifndef PRI64d
  35 #if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MSVCRT__)
  36 #define PRI64d  "I64d"
  37 #define PRI64u  "I64u"
  38 #define PRI64x  "I64x"
  39 #else
  40 #define PRI64d  "lld"
  41 #define PRI64u  "llu"
  42 #define PRI64x  "llx"
  43 #endif
  44 #endif
  45
  46 // This is needed because the foreach macro can't get over the comma in pair<t1, t2>
  47 #define PAIRTYPE(t1, t2)    pair<t1, t2>
  48
  49 // Used to bypass the rule against non-const reference to temporary
  50 // where it makes sense with wrappers such as CFlatData or CTxDB
  51 template<typename T>
  52 inline T& REF(const T& val)
  53 {
  54     return (T&)val;
  55 }
  56
  57 // Align by increasing pointer, must have extra space at end of buffer
  58 template <size_t nBytes, typename T>
  59 T* alignup(T* p)
  60 {
  61     union
  62     {
  63         T* ptr;
  64         size_t n;
  65     } u;
  66     u.ptr = p;
  67     u.n = (u.n + (nBytes-1)) & ~(nBytes-1);
  68     return u.ptr;
  69 }
  70
  71 #ifdef __WXMSW__
  72 #define MSG_NOSIGNAL        0
  73 #define MSG_DONTWAIT        0
  74 #ifndef UINT64_MAX
  75 #define UINT64_MAX          _UI64_MAX
  76 #define INT64_MAX           _I64_MAX
  77 #define INT64_MIN           _I64_MIN
  78 #endif
  79 #ifndef S_IRUSR
  80 #define S_IRUSR             0400
  81 #define S_IWUSR             0200
  82 #endif
  83 #define unlink              _unlink
  84 typedef int socklen_t;
  85 #else
  86 #define WSAGetLastError()   errno
  87 #define WSAEWOULDBLOCK      EWOULDBLOCK
  88 #define WSAEMSGSIZE         EMSGSIZE
  89 #define WSAEINTR            EINTR
  90 #define WSAEINPROGRESS      EINPROGRESS
  91 #define WSAEADDRINUSE       EADDRINUSE
  92 #define WSAENOTSOCK         EBADF
  93 #define INVALID_SOCKET      (SOCKET)(~0)
  94 #define SOCKET_ERROR        -1
  95 typedef u_int SOCKET;
  96 #define _vsnprintf(a,b,c,d) vsnprintf(a,b,c,d)
  97 #define strlwr(psz)         to_lower(psz)
  98 #define _strlwr(psz)        to_lower(psz)
  99 #define MAX_PATH            1024
 100 #define Beep(n1,n2)         (0)
 101 inline void Sleep(int64 n)
 102 {
 103     boost::thread::sleep(boost::get_system_time() + boost::posix_time::milliseconds(n));
 104 }
 105 #endif
 106
 107 inline int myclosesocket(SOCKET& hSocket)
 108 {
 109     if (hSocket == INVALID_SOCKET)
 110         return WSAENOTSOCK;
 111 #ifdef __WXMSW__
 112     int ret = closesocket(hSocket);
 113 #else
 114     int ret = close(hSocket);
 115 #endif
 116     hSocket = INVALID_SOCKET;
 117     return ret;
 118 }
 119 #define closesocket(s)      myclosesocket(s)
 120
 121 #ifndef GUI
 122 inline const char* _(const char* psz)
 123 {
 124     return psz;
 125 }
 126 #endif
 127
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 135
 136
 137 extern map<string, string> mapArgs;
 138 extern map<string, vector<string> > mapMultiArgs;
 139 extern bool fDebug;
 140 extern bool fPrintToConsole;
 141 extern bool fPrintToDebugger;
 142 extern char pszSetDataDir[MAX_PATH];
 143 extern bool fRequestShutdown;
 144 extern bool fShutdown;
 145 extern bool fDaemon;
 146 extern bool fCommandLine;
 147 extern string strMiscWarning;
 148
 149 void RandAddSeed();
 150 void RandAddSeedPerfmon();
 151 int OutputDebugStringF(const char* pszFormat, ...);
 152 int my_snprintf(char* buffer, size_t limit, const char* format, ...);
 153 string strprintf(const char* format, ...);
 154 bool error(const char* format, ...);
 155 void LogException(std::exception* pex, const char* pszThread);
 156 void PrintException(std::exception* pex, const char* pszThread);
 157 void PrintExceptionContinue(std::exception* pex, const char* pszThread);
 158 void ParseString(const string& str, char c, vector<string>& v);
 159 string FormatMoney(int64 n, bool fPlus=false);
 160 bool ParseMoney(const string& str, int64& nRet);
 161 bool ParseMoney(const char* pszIn, int64& nRet);
 162 vector<unsigned char> ParseHex(const char* psz);
 163 vector<unsigned char> ParseHex(const string& str);
 164 void ParseParameters(int argc, char* argv[]);
 165 const char* wxGetTranslation(const char* psz);
 166 bool WildcardMatch(const char* psz, const char* mask);
 167 bool WildcardMatch(const string& str, const string& mask);
 168 int GetFilesize(FILE* file);
 169 void GetDataDir(char* pszDirRet);
 170 string GetConfigFile();
 171 void ReadConfigFile(map<string, string>& mapSettingsRet, map<string, vector<string> >& mapMultiSettingsRet);
 172 #ifdef __WXMSW__
 173 string MyGetSpecialFolderPath(int nFolder, bool fCreate);
 174 #endif
 175 string GetDefaultDataDir();
 176 string GetDataDir();
 177 void ShrinkDebugFile();
 178 int GetRandInt(int nMax);
 179 uint64 GetRand(uint64 nMax);
 180 int64 GetTime();
 181 int64 GetAdjustedTime();
 182 void AddTimeData(unsigned int ip, int64 nTime);
 183
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 193
 194
 195
 196 // Wrapper to automatically initialize critical sections
 197 class CCriticalSection
 198 {
 199 #ifdef __WXMSW__
 200 protected:
 201     CRITICAL_SECTION cs;
 202 public:
 203     explicit CCriticalSection() { InitializeCriticalSection(&cs); }
 204     ~CCriticalSection() { DeleteCriticalSection(&cs); }
 205     void Enter() { EnterCriticalSection(&cs); }
 206     void Leave() { LeaveCriticalSection(&cs); }
 207     bool TryEnter() { return TryEnterCriticalSection(&cs); }
 208 #else
 209 protected:
 210     boost::interprocess::interprocess_recursive_mutex mutex;
 211 public:
 212     explicit CCriticalSection() { }
 213     ~CCriticalSection() { }
 214     void Enter() { mutex.lock(); }
 215     void Leave() { mutex.unlock(); }
 216     bool TryEnter() { return mutex.try_lock(); }
 217 #endif
 218 public:
 219     const char* pszFile;
 220     int nLine;
 221 };
 222
 223 // Automatically leave critical section when leaving block, needed for exception safety
 224 class CCriticalBlock
 225 {
 226 protected:
 227     CCriticalSection* pcs;
 228 public:
 229     CCriticalBlock(CCriticalSection& csIn) { pcs = &csIn; pcs->Enter(); }
 230     ~CCriticalBlock() { pcs->Leave(); }
 231 };
 232
 233 // WARNING: This will catch continue and break!
 234 // break is caught with an assertion, but there's no way to detect continue.
 235 // I'd rather be careful than suffer the other more error prone syntax.
 236 // The compiler will optimise away all this loop junk.
 237 #define CRITICAL_BLOCK(cs)     \
 238     for (bool fcriticalblockonce=true; fcriticalblockonce; assert(("break caught by CRITICAL_BLOCK!", !fcriticalblockonce)), fcriticalblockonce=false)  \
 239     for (CCriticalBlock criticalblock(cs); fcriticalblockonce && (cs.pszFile=__FILE__, cs.nLine=__LINE__, true); fcriticalblockonce=false, cs.pszFile=NULL, cs.nLine=0)
 240
 241 class CTryCriticalBlock
 242 {
 243 protected:
 244     CCriticalSection* pcs;
 245 public:
 246     CTryCriticalBlock(CCriticalSection& csIn) { pcs = (csIn.TryEnter() ? &csIn : NULL); }
 247     ~CTryCriticalBlock() { if (pcs) pcs->Leave(); }
 248     bool Entered() { return pcs != NULL; }
 249 };
 250
 251 #define TRY_CRITICAL_BLOCK(cs)     \
 252     for (bool fcriticalblockonce=true; fcriticalblockonce; assert(("break caught by TRY_CRITICAL_BLOCK!", !fcriticalblockonce)), fcriticalblockonce=false)  \
 253     for (CTryCriticalBlock criticalblock(cs); fcriticalblockonce && (fcriticalblockonce = criticalblock.Entered()) && (cs.pszFile=__FILE__, cs.nLine=__LINE__, true); fcriticalblockonce=false, cs.pszFile=NULL, cs.nLine=0)
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 262
 263
 264 inline string i64tostr(int64 n)
 265 {
 266     return strprintf("%"PRI64d, n);
 267 }
 268
 269 inline string itostr(int n)
 270 {
 271     return strprintf("%d", n);
 272 }
 273
 274 inline int64 atoi64(const char* psz)
 275 {
 276 #ifdef _MSC_VER
 277     return _atoi64(psz);
 278 #else
 279     return strtoll(psz, NULL, 10);
 280 #endif
 281 }
 282
 283 inline int64 atoi64(const string& str)
 284 {
 285 #ifdef _MSC_VER
 286     return _atoi64(str.c_str());
 287 #else
 288     return strtoll(str.c_str(), NULL, 10);
 289 #endif
 290 }
 291
 292 inline int atoi(const string& str)
 293 {
 294     return atoi(str.c_str());
 295 }
 296
 297 inline int roundint(double d)
 298 {
 299     return (int)(d > 0 ? d + 0.5 : d - 0.5);
 300 }
 301
 302 inline int64 roundint64(double d)
 303 {
 304     return (int64)(d > 0 ? d + 0.5 : d - 0.5);
 305 }
 306
 307 inline int64 abs64(int64 n)
 308 {
 309     return (n >= 0 ? n : -n);
 310 }
 311
 312 template<typename T>
 313 string HexStr(const T itbegin, const T itend, bool fSpaces=false)
 314 {
 315     if (itbegin == itend)
 316         return "";
 317     const unsigned char* pbegin = (const unsigned char*)&itbegin[0];
 318     const unsigned char* pend = pbegin + (itend - itbegin) * sizeof(itbegin[0]);
 319     string str;
 320     str.reserve((pend-pbegin) * (fSpaces ? 3 : 2));
 321     for (const unsigned char* p = pbegin; p != pend; p++)
 322         str += strprintf((fSpaces && p != pend-1 ? "%02x " : "%02x"), *p);
 323     return str;
 324 }
 325
 326 inline string HexStr(const vector<unsigned char>& vch, bool fSpaces=false)
 327 {
 328     return HexStr(vch.begin(), vch.end(), fSpaces);
 329 }
 330
 331 template<typename T>
 332 string HexNumStr(const T itbegin, const T itend, bool f0x=true)
 333 {
 334     if (itbegin == itend)
 335         return "";
 336     const unsigned char* pbegin = (const unsigned char*)&itbegin[0];
 337     const unsigned char* pend = pbegin + (itend - itbegin) * sizeof(itbegin[0]);
 338     string str = (f0x ? "0x" : "");
 339     str.reserve(str.size() + (pend-pbegin) * 2);
 340     for (const unsigned char* p = pend-1; p >= pbegin; p--)
 341         str += strprintf("%02x", *p);
 342     return str;
 343 }
 344
 345 inline string HexNumStr(const vector<unsigned char>& vch, bool f0x=true)
 346 {
 347     return HexNumStr(vch.begin(), vch.end(), f0x);
 348 }
 349
 350 template<typename T>
 351 void PrintHex(const T pbegin, const T pend, const char* pszFormat="%s", bool fSpaces=true)
 352 {
 353     printf(pszFormat, HexStr(pbegin, pend, fSpaces).c_str());
 354 }
 355
 356 inline void PrintHex(const vector<unsigned char>& vch, const char* pszFormat="%s", bool fSpaces=true)
 357 {
 358     printf(pszFormat, HexStr(vch, fSpaces).c_str());
 359 }
 360
 361 inline int64 GetPerformanceCounter()
 362 {
 363     int64 nCounter = 0;
 364 #ifdef __WXMSW__
 365     QueryPerformanceCounter((LARGE_INTEGER*)&nCounter);
 366 #else
 367     timeval t;
 368     gettimeofday(&t, NULL);
 369     nCounter = t.tv_sec * 1000000 + t.tv_usec;
 370 #endif
 371     return nCounter;
 372 }
 373
 374 inline int64 GetTimeMillis()
 375 {
 376     return (posix_time::ptime(posix_time::microsec_clock::universal_time()) -
 377             posix_time::ptime(gregorian::date(1970,1,1))).total_milliseconds();
 378 }
 379
 380 inline string DateTimeStrFormat(const char* pszFormat, int64 nTime)
 381 {
 382     time_t n = nTime;
 383     struct tm* ptmTime = gmtime(&n);
 384     char pszTime[200];
 385     strftime(pszTime, sizeof(pszTime), pszFormat, ptmTime);
 386     return pszTime;
 387 }
 388
 389 template<typename T>
 390 void skipspaces(T& it)
 391 {
 392     while (isspace(*it))
 393         ++it;
 394 }
 395
 396 inline bool IsSwitchChar(char c)
 397 {
 398 #ifdef __WXMSW__
 399     return c == '-' || c == '/';
 400 #else
 401     return c == '-';
 402 #endif
 403 }
 404
 405 inline string GetArg(const string& strArg, const string& strDefault)
 406 {
 407     if (mapArgs.count(strArg))
 408         return mapArgs[strArg];
 409     return strDefault;
 410 }
 411
 412 inline int64 GetArg(const string& strArg, int64 nDefault)
 413 {
 414     if (mapArgs.count(strArg))
 415         return atoi64(mapArgs[strArg]);
 416     return nDefault;
 417 }
 418
 419 inline string FormatVersion(int nVersion)
 420 {
 421     if (nVersion%100 == 0)
 422         return strprintf("%d.%d.%d", nVersion/1000000, (nVersion/10000)%100, (nVersion/100)%100);
 423     else
 424         return strprintf("%d.%d.%d.%d", nVersion/1000000, (nVersion/10000)%100, (nVersion/100)%100, nVersion%100);
 425 }
 426
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 435
 436 inline void heapchk()
 437 {
 438 #ifdef __WXMSW__
 439     /// for debugging
 440     //if (_heapchk() != _HEAPOK)
 441     //    DebugBreak();
 442 #endif
 443 }
 444
 445 // Randomize the stack to help protect against buffer overrun exploits
 446 #define IMPLEMENT_RANDOMIZE_STACK(ThreadFn)     \
 447     {                                           \
 448         static char nLoops;                     \
 449         if (nLoops <= 0)                        \
 450             nLoops = GetRand(20) + 1;           \
 451         if (nLoops-- > 1)                       \
 452         {                                       \
 453             ThreadFn;                           \
 454             return;                             \
 455         }                                       \
 456     }
 457
 458 #define CATCH_PRINT_EXCEPTION(pszFn)     \
 459     catch (std::exception& e) {          \
 460         PrintException(&e, (pszFn));     \
 461     } catch (...) {                      \
 462         PrintException(NULL, (pszFn));   \
 463     }
 464
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 473
 474 template<typename T1>
 475 inline uint256 Hash(const T1 pbegin, const T1 pend)
 476 {
 477     static unsigned char pblank[1];
 478     uint256 hash1;
 479     SHA256((pbegin == pend ? pblank : (unsigned char*)&pbegin[0]), (pend - pbegin) * sizeof(pbegin[0]), (unsigned char*)&hash1);
 480     uint256 hash2;
 481     SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
 482     return hash2;
 483 }
 484
 485 template<typename T1, typename T2>
 486 inline uint256 Hash(const T1 p1begin, const T1 p1end,
 487                     const T2 p2begin, const T2 p2end)
 488 {
 489     static unsigned char pblank[1];
 490     uint256 hash1;
 491     SHA256_CTX ctx;
 492     SHA256_Init(&ctx);
 493     SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
 494     SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
 495     SHA256_Final((unsigned char*)&hash1, &ctx);
 496     uint256 hash2;
 497     SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
 498     return hash2;
 499 }
 500
 501 template<typename T1, typename T2, typename T3>
 502 inline uint256 Hash(const T1 p1begin, const T1 p1end,
 503                     const T2 p2begin, const T2 p2end,
 504                     const T3 p3begin, const T3 p3end)
 505 {
 506     static unsigned char pblank[1];
 507     uint256 hash1;
 508     SHA256_CTX ctx;
 509     SHA256_Init(&ctx);
 510     SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
 511     SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
 512     SHA256_Update(&ctx, (p3begin == p3end ? pblank : (unsigned char*)&p3begin[0]), (p3end - p3begin) * sizeof(p3begin[0]));
 513     SHA256_Final((unsigned char*)&hash1, &ctx);
 514     uint256 hash2;
 515     SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
 516     return hash2;
 517 }
 518
 519 template<typename T>
 520 uint256 SerializeHash(const T& obj, int nType=SER_GETHASH, int nVersion=VERSION)
 521 {
 522     // Most of the time is spent allocating and deallocating CDataStream's
 523     // buffer.  If this ever needs to be optimized further, make a CStaticStream
 524     // class with its buffer on the stack.
 525     CDataStream ss(nType, nVersion);
 526     ss.reserve(10000);
 527     ss << obj;
 528     return Hash(ss.begin(), ss.end());
 529 }
 530
 531 inline uint160 Hash160(const vector<unsigned char>& vch)
 532 {
 533     uint256 hash1;
 534     SHA256(&vch[0], vch.size(), (unsigned char*)&hash1);
 535     uint160 hash2;
 536     RIPEMD160((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
 537     return hash2;
 538 }
 539
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 547
 548
 549
 550 // Note: It turns out we might have been able to use boost::thread
 551 // by using TerminateThread(boost::thread.native_handle(), 0);
 552 #ifdef __WXMSW__
 553 typedef HANDLE pthread_t;
 554
 555 inline pthread_t CreateThread(void(*pfn)(void*), void* parg, bool fWantHandle=false)
 556 {
 557     DWORD nUnused = 0;
 558     HANDLE hthread =
 559         CreateThread(
 560             NULL,                        // default security
 561             0,                           // inherit stack size from parent
 562             (LPTHREAD_START_ROUTINE)pfn, // function pointer
 563             parg,                        // argument
 564             0,                           // creation option, start immediately
 565             &nUnused);                   // thread identifier
 566     if (hthread == NULL)
 567     {
 568         printf("Error: CreateThread() returned %d\n", GetLastError());
 569         return (pthread_t)0;
 570     }
 571     if (!fWantHandle)
 572     {
 573         CloseHandle(hthread);
 574         return (pthread_t)-1;
 575     }
 576     return hthread;
 577 }
 578
 579 inline void SetThreadPriority(int nPriority)
 580 {
 581     SetThreadPriority(GetCurrentThread(), nPriority);
 582 }
 583 #else
 584 inline pthread_t CreateThread(void(*pfn)(void*), void* parg, bool fWantHandle=false)
 585 {
 586     pthread_t hthread = 0;
 587     int ret = pthread_create(&hthread, NULL, (void*(*)(void*))pfn, parg);
 588     if (ret != 0)
 589     {
 590         printf("Error: pthread_create() returned %d\n", ret);
 591         return (pthread_t)0;
 592     }
 593     if (!fWantHandle)
 594         return (pthread_t)-1;
 595     return hthread;
 596 }
 597
 598 #define THREAD_PRIORITY_LOWEST          PRIO_MAX
 599 #define THREAD_PRIORITY_BELOW_NORMAL    2
 600 #define THREAD_PRIORITY_NORMAL          0
 601 #define THREAD_PRIORITY_ABOVE_NORMAL    0
 602
 603 inline void SetThreadPriority(int nPriority)
 604 {
 605     // It's unclear if it's even possible to change thread priorities on Linux,
 606     // but we really and truly need it for the generation threads.
 607 #ifdef PRIO_THREAD
 608     setpriority(PRIO_THREAD, 0, nPriority);
 609 #else
 610     setpriority(PRIO_PROCESS, 0, nPriority);
 611 #endif
 612 }
 613
 614 inline bool TerminateThread(pthread_t hthread, unsigned int nExitCode)
 615 {
 616     return (pthread_cancel(hthread) == 0);
 617 }
 618
 619 inline void ExitThread(unsigned int nExitCode)
 620 {
 621     pthread_exit((void*)nExitCode);
 622 }
 623 #endif