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lbrycrd/src/util.h
Pieter Wuille 4b603f1cd6 Inline base64 encoder/decoder 
This replaces the openssl-based base64 encoder and decoder with a more
efficient internal one. Tested against the rfc4648 test vectors.

Decoder is based on JoelKatz' version.
2011-09-27 19:47:35 +02:00

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2011 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file license.txt or http://www.opensource.org/licenses/mit-license.php.
#ifndef BITCOIN_UTIL_H
#define BITCOIN_UTIL_H
#include "uint256.h"
#ifndef __WXMSW__
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
#endif
#include <map>
#include <vector>
#include <string>
#include <boost/thread.hpp>
#include <boost/interprocess/sync/interprocess_recursive_mutex.hpp>
#include <boost/date_time/gregorian/gregorian_types.hpp>
#include <boost/date_time/posix_time/posix_time_types.hpp>
#include <openssl/sha.h>
#include <openssl/ripemd.h>
#if defined(_MSC_VER) || defined(__BORLANDC__)
typedef __int64 int64;
typedef unsigned __int64 uint64;
#else
typedef long long int64;
typedef unsigned long long uint64;
#endif
#if defined(_MSC_VER) && _MSC_VER < 1300
#define for if (false) ; else for
#endif
#ifndef _MSC_VER
#define __forceinline inline
#endif
#define loop for (;;)
#define BEGIN(a) ((char*)&(a))
#define END(a) ((char*)&((&(a))[1]))
#define UBEGIN(a) ((unsigned char*)&(a))
#define UEND(a) ((unsigned char*)&((&(a))[1]))
#define ARRAYLEN(array) (sizeof(array)/sizeof((array)[0]))
#define printf OutputDebugStringF
#ifdef snprintf
#undef snprintf
#endif
#define snprintf my_snprintf
#ifndef PRI64d
#if defined(_MSC_VER) || defined(__BORLANDC__) || defined(__MSVCRT__)
#define PRI64d "I64d"
#define PRI64u "I64u"
#define PRI64x "I64x"
#else
#define PRI64d "lld"
#define PRI64u "llu"
#define PRI64x "llx"
#endif
#endif
// This is needed because the foreach macro can't get over the comma in pair<t1, t2>
#define PAIRTYPE(t1, t2) std::pair<t1, t2>
// Align by increasing pointer, must have extra space at end of buffer
template <size_t nBytes, typename T>
T* alignup(T* p)
{
union
{
T* ptr;
size_t n;
} u;
u.ptr = p;
u.n = (u.n + (nBytes-1)) & ~(nBytes-1);
return u.ptr;
}
#ifdef __WXMSW__
#define MSG_NOSIGNAL 0
#define MSG_DONTWAIT 0
#ifndef UINT64_MAX
#define UINT64_MAX _UI64_MAX
#define INT64_MAX _I64_MAX
#define INT64_MIN _I64_MIN
#endif
#ifndef S_IRUSR
#define S_IRUSR 0400
#define S_IWUSR 0200
#endif
#define unlink _unlink
typedef int socklen_t;
#else
#define WSAGetLastError() errno
#define WSAEINVAL EINVAL
#define WSAEALREADY EALREADY
#define WSAEWOULDBLOCK EWOULDBLOCK
#define WSAEMSGSIZE EMSGSIZE
#define WSAEINTR EINTR
#define WSAEINPROGRESS EINPROGRESS
#define WSAEADDRINUSE EADDRINUSE
#define WSAENOTSOCK EBADF
#define INVALID_SOCKET (SOCKET)(~0)
#define SOCKET_ERROR -1
typedef u_int SOCKET;
#define _vsnprintf(a,b,c,d) vsnprintf(a,b,c,d)
#define strlwr(psz) to_lower(psz)
#define _strlwr(psz) to_lower(psz)
#define MAX_PATH 1024
#define Beep(n1,n2) (0)
inline void Sleep(int64 n)
{
boost::thread::sleep(boost::get_system_time() + boost::posix_time::milliseconds(n));
}
#endif
inline int myclosesocket(SOCKET& hSocket)
{
if (hSocket == INVALID_SOCKET)
return WSAENOTSOCK;
#ifdef __WXMSW__
int ret = closesocket(hSocket);
#else
int ret = close(hSocket);
#endif
hSocket = INVALID_SOCKET;
return ret;
}
#define closesocket(s) myclosesocket(s)
#if !defined(QT_GUI)
inline const char* _(const char* psz)
{
return psz;
}
#endif
extern std::map<std::string, std::string> mapArgs;
extern std::map<std::string, std::vector<std::string> > mapMultiArgs;
extern bool fDebug;
extern bool fPrintToConsole;
extern bool fPrintToDebugger;
extern char pszSetDataDir[MAX_PATH];
extern bool fRequestShutdown;
extern bool fShutdown;
extern bool fDaemon;
extern bool fServer;
extern bool fCommandLine;
extern std::string strMiscWarning;
extern bool fTestNet;
extern bool fNoListen;
extern bool fLogTimestamps;
void RandAddSeed();
void RandAddSeedPerfmon();
int OutputDebugStringF(const char* pszFormat, ...);
int my_snprintf(char* buffer, size_t limit, const char* format, ...);
std::string strprintf(const std::string &format, ...);
bool error(const std::string &format, ...);
void LogException(std::exception* pex, const char* pszThread);
void PrintException(std::exception* pex, const char* pszThread);
void PrintExceptionContinue(std::exception* pex, const char* pszThread);
void ParseString(const std::string& str, char c, std::vector<std::string>& v);
std::string FormatMoney(int64 n, bool fPlus=false);
bool ParseMoney(const std::string& str, int64& nRet);
bool ParseMoney(const char* pszIn, int64& nRet);
std::vector<unsigned char> ParseHex(const char* psz);
std::vector<unsigned char> ParseHex(const std::string& str);
std::vector<unsigned char> DecodeBase64(const char* p, bool* pfInvalid = NULL);
std::string DecodeBase64(const std::string& str);
std::string EncodeBase64(const unsigned char* pch, size_t len);
std::string EncodeBase64(const std::string& str);
void ParseParameters(int argc, char* argv[]);
const char* wxGetTranslation(const char* psz);
bool WildcardMatch(const char* psz, const char* mask);
bool WildcardMatch(const std::string& str, const std::string& mask);
int GetFilesize(FILE* file);
void GetDataDir(char* pszDirRet);
std::string GetConfigFile();
std::string GetPidFile();
void CreatePidFile(std::string pidFile, pid_t pid);
void ReadConfigFile(std::map<std::string, std::string>& mapSettingsRet, std::map<std::string, std::vector<std::string> >& mapMultiSettingsRet);
#ifdef __WXMSW__
std::string MyGetSpecialFolderPath(int nFolder, bool fCreate);
#endif
std::string GetDefaultDataDir();
std::string GetDataDir();
void ShrinkDebugFile();
int GetRandInt(int nMax);
uint64 GetRand(uint64 nMax);
int64 GetTime();
void SetMockTime(int64 nMockTimeIn);
int64 GetAdjustedTime();
void AddTimeData(unsigned int ip, int64 nTime);
std::string FormatFullVersion();
// Wrapper to automatically initialize mutex
class CCriticalSection
{
protected:
boost::interprocess::interprocess_recursive_mutex mutex;
public:
explicit CCriticalSection() { }
~CCriticalSection() { }
void Enter(const char* pszName, const char* pszFile, int nLine);
void Leave();
bool TryEnter(const char* pszName, const char* pszFile, int nLine);
};
// Automatically leave critical section when leaving block, needed for exception safety
class CCriticalBlock
{
protected:
CCriticalSection* pcs;
public:
CCriticalBlock(CCriticalSection& csIn, const char* pszName, const char* pszFile, int nLine)
{
pcs = &csIn;
pcs->Enter(pszName, pszFile, nLine);
}
~CCriticalBlock()
{
pcs->Leave();
}
};
// WARNING: This will catch continue and break!
// break is caught with an assertion, but there's no way to detect continue.
// I'd rather be careful than suffer the other more error prone syntax.
// The compiler will optimise away all this loop junk.
#define CRITICAL_BLOCK(cs) \
for (bool fcriticalblockonce=true; fcriticalblockonce; assert(("break caught by CRITICAL_BLOCK!" && !fcriticalblockonce)), fcriticalblockonce=false) \
for (CCriticalBlock criticalblock(cs, #cs, __FILE__, __LINE__); fcriticalblockonce; fcriticalblockonce=false)
class CTryCriticalBlock
{
protected:
CCriticalSection* pcs;
public:
CTryCriticalBlock(CCriticalSection& csIn, const char* pszName, const char* pszFile, int nLine)
{
pcs = (csIn.TryEnter(pszName, pszFile, nLine) ? &csIn : NULL);
}
~CTryCriticalBlock()
{
if (pcs)
{
pcs->Leave();
}
}
bool Entered() { return pcs != NULL; }
};
#define TRY_CRITICAL_BLOCK(cs) \
for (bool fcriticalblockonce=true; fcriticalblockonce; assert(("break caught by TRY_CRITICAL_BLOCK!" && !fcriticalblockonce)), fcriticalblockonce=false) \
for (CTryCriticalBlock criticalblock(cs, #cs, __FILE__, __LINE__); fcriticalblockonce && (fcriticalblockonce = criticalblock.Entered()); fcriticalblockonce=false)
inline std::string i64tostr(int64 n)
{
return strprintf("%"PRI64d, n);
}
inline std::string itostr(int n)
{
return strprintf("%d", n);
}
inline int64 atoi64(const char* psz)
{
#ifdef _MSC_VER
return _atoi64(psz);
#else
return strtoll(psz, NULL, 10);
#endif
}
inline int64 atoi64(const std::string& str)
{
#ifdef _MSC_VER
return _atoi64(str.c_str());
#else
return strtoll(str.c_str(), NULL, 10);
#endif
}
inline int atoi(const std::string& str)
{
return atoi(str.c_str());
}
inline int roundint(double d)
{
return (int)(d > 0 ? d + 0.5 : d - 0.5);
}
inline int64 roundint64(double d)
{
return (int64)(d > 0 ? d + 0.5 : d - 0.5);
}
inline int64 abs64(int64 n)
{
return (n >= 0 ? n : -n);
}
template<typename T>
std::string HexStr(const T itbegin, const T itend, bool fSpaces=false)
{
if (itbegin == itend)
return "";
const unsigned char* pbegin = (const unsigned char*)&itbegin[0];
const unsigned char* pend = pbegin + (itend - itbegin) * sizeof(itbegin[0]);
std::string str;
str.reserve((pend-pbegin) * (fSpaces ? 3 : 2));
for (const unsigned char* p = pbegin; p != pend; p++)
str += strprintf((fSpaces && p != pend-1 ? "%02x " : "%02x"), *p);
return str;
}
inline std::string HexStr(const std::vector<unsigned char>& vch, bool fSpaces=false)
{
return HexStr(vch.begin(), vch.end(), fSpaces);
}
template<typename T>
std::string HexNumStr(const T itbegin, const T itend, bool f0x=true)
{
if (itbegin == itend)
return "";
const unsigned char* pbegin = (const unsigned char*)&itbegin[0];
const unsigned char* pend = pbegin + (itend - itbegin) * sizeof(itbegin[0]);
std::string str = (f0x ? "0x" : "");
str.reserve(str.size() + (pend-pbegin) * 2);
for (const unsigned char* p = pend-1; p >= pbegin; p--)
str += strprintf("%02x", *p);
return str;
}
inline std::string HexNumStr(const std::vector<unsigned char>& vch, bool f0x=true)
{
return HexNumStr(vch.begin(), vch.end(), f0x);
}
template<typename T>
void PrintHex(const T pbegin, const T pend, const char* pszFormat="%s", bool fSpaces=true)
{
printf(pszFormat, HexStr(pbegin, pend, fSpaces).c_str());
}
inline void PrintHex(const std::vector<unsigned char>& vch, const char* pszFormat="%s", bool fSpaces=true)
{
printf(pszFormat, HexStr(vch, fSpaces).c_str());
}
inline int64 GetPerformanceCounter()
{
int64 nCounter = 0;
#ifdef __WXMSW__
QueryPerformanceCounter((LARGE_INTEGER*)&nCounter);
#else
timeval t;
gettimeofday(&t, NULL);
nCounter = t.tv_sec * 1000000 + t.tv_usec;
#endif
return nCounter;
}
inline int64 GetTimeMillis()
{
return (boost::posix_time::ptime(boost::posix_time::microsec_clock::universal_time()) -
boost::posix_time::ptime(boost::gregorian::date(1970,1,1))).total_milliseconds();
}
inline std::string DateTimeStrFormat(const char* pszFormat, int64 nTime)
{
time_t n = nTime;
struct tm* ptmTime = gmtime(&n);
char pszTime[200];
strftime(pszTime, sizeof(pszTime), pszFormat, ptmTime);
return pszTime;
}
template<typename T>
void skipspaces(T& it)
{
while (isspace(*it))
++it;
}
inline bool IsSwitchChar(char c)
{
#ifdef __WXMSW__
return c == '-' || c == '/';
#else
return c == '-';
#endif
}
inline std::string GetArg(const std::string& strArg, const std::string& strDefault)
{
if (mapArgs.count(strArg))
return mapArgs[strArg];
return strDefault;
}
inline int64 GetArg(const std::string& strArg, int64 nDefault)
{
if (mapArgs.count(strArg))
return atoi64(mapArgs[strArg]);
return nDefault;
}
inline bool GetBoolArg(const std::string& strArg)
{
if (mapArgs.count(strArg))
{
if (mapArgs[strArg].empty())
return true;
return (atoi(mapArgs[strArg]) != 0);
}
return false;
}
inline void heapchk()
{
#ifdef __WXMSW__
/// for debugging
//if (_heapchk() != _HEAPOK)
// DebugBreak();
#endif
}
// Randomize the stack to help protect against buffer overrun exploits
#define IMPLEMENT_RANDOMIZE_STACK(ThreadFn) \
{ \
static char nLoops; \
if (nLoops <= 0) \
nLoops = GetRand(20) + 1; \
if (nLoops-- > 1) \
{ \
ThreadFn; \
return; \
} \
}
#define CATCH_PRINT_EXCEPTION(pszFn) \
catch (std::exception& e) { \
PrintException(&e, (pszFn)); \
} catch (...) { \
PrintException(NULL, (pszFn)); \
}
template<typename T1>
inline uint256 Hash(const T1 pbegin, const T1 pend)
{
static unsigned char pblank[1];
uint256 hash1;
SHA256((pbegin == pend ? pblank : (unsigned char*)&pbegin[0]), (pend - pbegin) * sizeof(pbegin[0]), (unsigned char*)&hash1);
uint256 hash2;
SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
return hash2;
}
template<typename T1, typename T2>
inline uint256 Hash(const T1 p1begin, const T1 p1end,
const T2 p2begin, const T2 p2end)
{
static unsigned char pblank[1];
uint256 hash1;
SHA256_CTX ctx;
SHA256_Init(&ctx);
SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
SHA256_Final((unsigned char*)&hash1, &ctx);
uint256 hash2;
SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
return hash2;
}
template<typename T1, typename T2, typename T3>
inline uint256 Hash(const T1 p1begin, const T1 p1end,
const T2 p2begin, const T2 p2end,
const T3 p3begin, const T3 p3end)
{
static unsigned char pblank[1];
uint256 hash1;
SHA256_CTX ctx;
SHA256_Init(&ctx);
SHA256_Update(&ctx, (p1begin == p1end ? pblank : (unsigned char*)&p1begin[0]), (p1end - p1begin) * sizeof(p1begin[0]));
SHA256_Update(&ctx, (p2begin == p2end ? pblank : (unsigned char*)&p2begin[0]), (p2end - p2begin) * sizeof(p2begin[0]));
SHA256_Update(&ctx, (p3begin == p3end ? pblank : (unsigned char*)&p3begin[0]), (p3end - p3begin) * sizeof(p3begin[0]));
SHA256_Final((unsigned char*)&hash1, &ctx);
uint256 hash2;
SHA256((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
return hash2;
}
template<typename T>
uint256 SerializeHash(const T& obj, int nType=SER_GETHASH, int nVersion=VERSION)
{
// Most of the time is spent allocating and deallocating CDataStream's
// buffer. If this ever needs to be optimized further, make a CStaticStream
// class with its buffer on the stack.
CDataStream ss(nType, nVersion);
ss.reserve(10000);
ss << obj;
return Hash(ss.begin(), ss.end());
}
inline uint160 Hash160(const std::vector<unsigned char>& vch)
{
uint256 hash1;
SHA256(&vch[0], vch.size(), (unsigned char*)&hash1);
uint160 hash2;
RIPEMD160((unsigned char*)&hash1, sizeof(hash1), (unsigned char*)&hash2);
return hash2;
}
// Note: It turns out we might have been able to use boost::thread
// by using TerminateThread(boost::thread.native_handle(), 0);
#ifdef __WXMSW__
typedef HANDLE pthread_t;
inline pthread_t CreateThread(void(*pfn)(void*), void* parg, bool fWantHandle=false)
{
DWORD nUnused = 0;
HANDLE hthread =
CreateThread(
NULL, // default security
0, // inherit stack size from parent
(LPTHREAD_START_ROUTINE)pfn, // function pointer
parg, // argument
0, // creation option, start immediately
&nUnused); // thread identifier
if (hthread == NULL)
{
printf("Error: CreateThread() returned %d\n", GetLastError());
return (pthread_t)0;
}
if (!fWantHandle)
{
CloseHandle(hthread);
return (pthread_t)-1;
}
return hthread;
}
inline void SetThreadPriority(int nPriority)
{
SetThreadPriority(GetCurrentThread(), nPriority);
}
#else
inline pthread_t CreateThread(void(*pfn)(void*), void* parg, bool fWantHandle=false)
{
pthread_t hthread = 0;
int ret = pthread_create(&hthread, NULL, (void*(*)(void*))pfn, parg);
if (ret != 0)
{
printf("Error: pthread_create() returned %d\n", ret);
return (pthread_t)0;
}
if (!fWantHandle)
{
pthread_detach(hthread);
return (pthread_t)-1;
}
return hthread;
}
#define THREAD_PRIORITY_LOWEST PRIO_MAX
#define THREAD_PRIORITY_BELOW_NORMAL 2
#define THREAD_PRIORITY_NORMAL 0
#define THREAD_PRIORITY_ABOVE_NORMAL 0
inline void SetThreadPriority(int nPriority)
{
// It's unclear if it's even possible to change thread priorities on Linux,
// but we really and truly need it for the generation threads.
#ifdef PRIO_THREAD
setpriority(PRIO_THREAD, 0, nPriority);
#else
setpriority(PRIO_PROCESS, 0, nPriority);
#endif
}
inline bool TerminateThread(pthread_t hthread, unsigned int nExitCode)
{
return (pthread_cancel(hthread) == 0);
}
inline void ExitThread(size_t nExitCode)
{
pthread_exit((void*)nExitCode);
}
#endif
inline bool AffinityBugWorkaround(void(*pfn)(void*))
{
#ifdef __WXMSW__
// Sometimes after a few hours affinity gets stuck on one processor
DWORD dwProcessAffinityMask = -1;
DWORD dwSystemAffinityMask = -1;
GetProcessAffinityMask(GetCurrentProcess(), &dwProcessAffinityMask, &dwSystemAffinityMask);
DWORD dwPrev1 = SetThreadAffinityMask(GetCurrentThread(), dwProcessAffinityMask);
DWORD dwPrev2 = SetThreadAffinityMask(GetCurrentThread(), dwProcessAffinityMask);
if (dwPrev2 != dwProcessAffinityMask)
{
printf("AffinityBugWorkaround() : SetThreadAffinityMask=%d, ProcessAffinityMask=%d, restarting thread\n", dwPrev2, dwProcessAffinityMask);
if (!CreateThread(pfn, NULL))
printf("Error: CreateThread() failed\n");
return true;
}
#endif
return false;
}
#endif
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