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lbrycrd/src/util.cpp
Philip Kaufmann ac14bcc1f1 small formatting, indentation and comment fixes 
- contains zero code changes
2014-06-10 18:23:56 +02:00

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// Copyright (c) 2009-2010 Satoshi Nakamoto
// Copyright (c) 2009-2014 The Bitcoin developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "util.h"
#include "chainparams.h"
#include "netbase.h"
#include "sync.h"
#include "ui_interface.h"
#include "uint256.h"
#include "version.h"
#include <stdarg.h>
#include <boost/date_time/posix_time/posix_time.hpp>
#ifndef WIN32
// for posix_fallocate
#ifdef __linux_
#ifdef _POSIX_C_SOURCE
#undef _POSIX_C_SOURCE
#endif
#define _POSIX_C_SOURCE 200112L
#include <sys/prctl.h>
#endif
#include <algorithm>
#include <fcntl.h>
#include <sys/resource.h>
#include <sys/stat.h>
#else
#ifdef _MSC_VER
#pragma warning(disable:4786)
#pragma warning(disable:4804)
#pragma warning(disable:4805)
#pragma warning(disable:4717)
#endif
#ifdef _WIN32_WINNT
#undef _WIN32_WINNT
#endif
#define _WIN32_WINNT 0x0501
#ifdef _WIN32_IE
#undef _WIN32_IE
#endif
#define _WIN32_IE 0x0501
#define WIN32_LEAN_AND_MEAN 1
#ifndef NOMINMAX
#define NOMINMAX
#endif
#include <io.h> /* for _commit */
#include <shlobj.h>
#endif
#include <boost/algorithm/string/case_conv.hpp> // for to_lower()
#include <boost/algorithm/string/join.hpp>
#include <boost/algorithm/string/predicate.hpp> // for startswith() and endswith()
#include <boost/filesystem.hpp>
#include <boost/filesystem/fstream.hpp>
#include <boost/foreach.hpp>
#include <boost/program_options/detail/config_file.hpp>
#include <boost/program_options/parsers.hpp>
#include <openssl/crypto.h>
#include <openssl/rand.h>
// Work around clang compilation problem in Boost 1.46:
// /usr/include/boost/program_options/detail/config_file.hpp:163:17: error: call to function 'to_internal' that is neither visible in the template definition nor found by argument-dependent lookup
// See also: http://stackoverflow.com/questions/10020179/compilation-fail-in-boost-librairies-program-options
// http://clang.debian.net/status.php?version=3.0&key=CANNOT_FIND_FUNCTION
namespace boost {
namespace program_options {
std::string to_internal(const std::string&);
}
}
using namespace std;
map<string, string> mapArgs;
map<string, vector<string> > mapMultiArgs;
bool fDebug = false;
bool fPrintToConsole = false;
bool fPrintToDebugLog = true;
bool fDaemon = false;
bool fServer = false;
string strMiscWarning;
bool fLogTimestamps = false;
volatile bool fReopenDebugLog = false;
CClientUIInterface uiInterface;
// Init OpenSSL library multithreading support
static CCriticalSection** ppmutexOpenSSL;
void locking_callback(int mode, int i, const char* file, int line)
{
if (mode & CRYPTO_LOCK) {
ENTER_CRITICAL_SECTION(*ppmutexOpenSSL[i]);
} else {
LEAVE_CRITICAL_SECTION(*ppmutexOpenSSL[i]);
}
}
// Init
class CInit
{
public:
CInit()
{
// Init OpenSSL library multithreading support
ppmutexOpenSSL = (CCriticalSection**)OPENSSL_malloc(CRYPTO_num_locks() * sizeof(CCriticalSection*));
for (int i = 0; i < CRYPTO_num_locks(); i++)
ppmutexOpenSSL[i] = new CCriticalSection();
CRYPTO_set_locking_callback(locking_callback);
#ifdef WIN32
// Seed random number generator with screen scrape and other hardware sources
RAND_screen();
#endif
// Seed random number generator with performance counter
RandAddSeed();
}
~CInit()
{
// Shutdown OpenSSL library multithreading support
CRYPTO_set_locking_callback(NULL);
for (int i = 0; i < CRYPTO_num_locks(); i++)
delete ppmutexOpenSSL[i];
OPENSSL_free(ppmutexOpenSSL);
}
}
instance_of_cinit;
void RandAddSeed()
{
// Seed with CPU performance counter
int64_t nCounter = GetPerformanceCounter();
RAND_add(&nCounter, sizeof(nCounter), 1.5);
memset(&nCounter, 0, sizeof(nCounter));
}
void RandAddSeedPerfmon()
{
RandAddSeed();
// This can take up to 2 seconds, so only do it every 10 minutes
static int64_t nLastPerfmon;
if (GetTime() < nLastPerfmon + 10 * 60)
return;
nLastPerfmon = GetTime();
#ifdef WIN32
// Don't need this on Linux, OpenSSL automatically uses /dev/urandom
// Seed with the entire set of perfmon data
unsigned char pdata[250000];
memset(pdata, 0, sizeof(pdata));
unsigned long nSize = sizeof(pdata);
long ret = RegQueryValueExA(HKEY_PERFORMANCE_DATA, "Global", NULL, NULL, pdata, &nSize);
RegCloseKey(HKEY_PERFORMANCE_DATA);
if (ret == ERROR_SUCCESS)
{
RAND_add(pdata, nSize, nSize/100.0);
OPENSSL_cleanse(pdata, nSize);
LogPrint("rand", "RandAddSeed() %lu bytes\n", nSize);
}
#endif
}
uint64_t GetRand(uint64_t nMax)
{
if (nMax == 0)
return 0;
// The range of the random source must be a multiple of the modulus
// to give every possible output value an equal possibility
uint64_t nRange = (std::numeric_limits<uint64_t>::max() / nMax) * nMax;
uint64_t nRand = 0;
do
RAND_bytes((unsigned char*)&nRand, sizeof(nRand));
while (nRand >= nRange);
return (nRand % nMax);
}
int GetRandInt(int nMax)
{
return GetRand(nMax);
}
uint256 GetRandHash()
{
uint256 hash;
RAND_bytes((unsigned char*)&hash, sizeof(hash));
return hash;
}
// LogPrintf() has been broken a couple of times now
// by well-meaning people adding mutexes in the most straightforward way.
// It breaks because it may be called by global destructors during shutdown.
// Since the order of destruction of static/global objects is undefined,
// defining a mutex as a global object doesn't work (the mutex gets
// destroyed, and then some later destructor calls OutputDebugStringF,
// maybe indirectly, and you get a core dump at shutdown trying to lock
// the mutex).
static boost::once_flag debugPrintInitFlag = BOOST_ONCE_INIT;
// We use boost::call_once() to make sure these are initialized in
// in a thread-safe manner the first time it is called:
static FILE* fileout = NULL;
static boost::mutex* mutexDebugLog = NULL;
static void DebugPrintInit()
{
assert(fileout == NULL);
assert(mutexDebugLog == NULL);
boost::filesystem::path pathDebug = GetDataDir() / "debug.log";
fileout = fopen(pathDebug.string().c_str(), "a");
if (fileout) setbuf(fileout, NULL); // unbuffered
mutexDebugLog = new boost::mutex();
}
bool LogAcceptCategory(const char* category)
{
if (category != NULL)
{
if (!fDebug)
return false;
// Give each thread quick access to -debug settings.
// This helps prevent issues debugging global destructors,
// where mapMultiArgs might be deleted before another
// global destructor calls LogPrint()
static boost::thread_specific_ptr<set<string> > ptrCategory;
if (ptrCategory.get() == NULL)
{
const vector<string>& categories = mapMultiArgs["-debug"];
ptrCategory.reset(new set<string>(categories.begin(), categories.end()));
// thread_specific_ptr automatically deletes the set when the thread ends.
}
const set<string>& setCategories = *ptrCategory.get();
// if not debugging everything and not debugging specific category, LogPrint does nothing.
if (setCategories.count(string("")) == 0 &&
setCategories.count(string(category)) == 0)
return false;
}
return true;
}
int LogPrintStr(const std::string &str)
{
int ret = 0; // Returns total number of characters written
if (fPrintToConsole)
{
// print to console
ret = fwrite(str.data(), 1, str.size(), stdout);
}
else if (fPrintToDebugLog)
{
static bool fStartedNewLine = true;
boost::call_once(&DebugPrintInit, debugPrintInitFlag);
if (fileout == NULL)
return ret;
boost::mutex::scoped_lock scoped_lock(*mutexDebugLog);
// reopen the log file, if requested
if (fReopenDebugLog) {
fReopenDebugLog = false;
boost::filesystem::path pathDebug = GetDataDir() / "debug.log";
if (freopen(pathDebug.string().c_str(),"a",fileout) != NULL)
setbuf(fileout, NULL); // unbuffered
}
// Debug print useful for profiling
if (fLogTimestamps && fStartedNewLine)
ret += fprintf(fileout, "%s ", DateTimeStrFormat("%Y-%m-%d %H:%M:%S", GetTime()).c_str());
if (!str.empty() && str[str.size()-1] == '\n')
fStartedNewLine = true;
else
fStartedNewLine = false;
ret = fwrite(str.data(), 1, str.size(), fileout);
}
return ret;
}
string FormatMoney(int64_t n, bool fPlus)
{
// Note: not using straight sprintf here because we do NOT want
// localized number formatting.
int64_t n_abs = (n > 0 ? n : -n);
int64_t quotient = n_abs/COIN;
int64_t remainder = n_abs%COIN;
string str = strprintf("%d.%08d", quotient, remainder);
// Right-trim excess zeros before the decimal point:
int nTrim = 0;
for (int i = str.size()-1; (str[i] == '0' && isdigit(str[i-2])); --i)
++nTrim;
if (nTrim)
str.erase(str.size()-nTrim, nTrim);
if (n < 0)
str.insert((unsigned int)0, 1, '-');
else if (fPlus && n > 0)
str.insert((unsigned int)0, 1, '+');
return str;
}
bool ParseMoney(const string& str, int64_t& nRet)
{
return ParseMoney(str.c_str(), nRet);
}
bool ParseMoney(const char* pszIn, int64_t& nRet)
{
string strWhole;
int64_t nUnits = 0;
const char* p = pszIn;
while (isspace(*p))
p++;
for (; *p; p++)
{
if (*p == '.')
{
p++;
int64_t nMult = CENT*10;
while (isdigit(*p) && (nMult > 0))
{
nUnits += nMult * (*p++ - '0');
nMult /= 10;
}
break;
}
if (isspace(*p))
break;
if (!isdigit(*p))
return false;
strWhole.insert(strWhole.end(), *p);
}
for (; *p; p++)
if (!isspace(*p))
return false;
if (strWhole.size() > 10) // guard against 63 bit overflow
return false;
if (nUnits < 0 || nUnits > COIN)
return false;
int64_t nWhole = atoi64(strWhole);
int64_t nValue = nWhole*COIN + nUnits;
nRet = nValue;
return true;
}
// safeChars chosen to allow simple messages/URLs/email addresses, but avoid anything
// even possibly remotely dangerous like & or >
static string safeChars("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ01234567890 .,;_/:?@");
string SanitizeString(const string& str)
{
string strResult;
for (std::string::size_type i = 0; i < str.size(); i++)
{
if (safeChars.find(str[i]) != std::string::npos)
strResult.push_back(str[i]);
}
return strResult;
}
const signed char p_util_hexdigit[256] =
{ -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
0,1,2,3,4,5,6,7,8,9,-1,-1,-1,-1,-1,-1,
-1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,0xa,0xb,0xc,0xd,0xe,0xf,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1, };
bool IsHex(const string& str)
{
BOOST_FOREACH(char c, str)
{
if (HexDigit(c) < 0)
return false;
}
return (str.size() > 0) && (str.size()%2 == 0);
}
vector<unsigned char> ParseHex(const char* psz)
{
// convert hex dump to vector
vector<unsigned char> vch;
while (true)
{
while (isspace(*psz))
psz++;
signed char c = HexDigit(*psz++);
if (c == (signed char)-1)
break;
unsigned char n = (c << 4);
c = HexDigit(*psz++);
if (c == (signed char)-1)
break;
n |= c;
vch.push_back(n);
}
return vch;
}
vector<unsigned char> ParseHex(const string& str)
{
return ParseHex(str.c_str());
}
static void InterpretNegativeSetting(string name, map<string, string>& mapSettingsRet)
{
// interpret -nofoo as -foo=0 (and -nofoo=0 as -foo=1) as long as -foo not set
if (name.find("-no") == 0)
{
std::string positive("-");
positive.append(name.begin()+3, name.end());
if (mapSettingsRet.count(positive) == 0)
{
bool value = !GetBoolArg(name, false);
mapSettingsRet[positive] = (value ? "1" : "0");
}
}
}
void ParseParameters(int argc, const char* const argv[])
{
mapArgs.clear();
mapMultiArgs.clear();
for (int i = 1; i < argc; i++)
{
std::string str(argv[i]);
std::string strValue;
size_t is_index = str.find('=');
if (is_index != std::string::npos)
{
strValue = str.substr(is_index+1);
str = str.substr(0, is_index);
}
#ifdef WIN32
boost::to_lower(str);
if (boost::algorithm::starts_with(str, "/"))
str = "-" + str.substr(1);
#endif
if (str[0] != '-')
break;
mapArgs[str] = strValue;
mapMultiArgs[str].push_back(strValue);
}
// New 0.6 features:
BOOST_FOREACH(const PAIRTYPE(string,string)& entry, mapArgs)
{
string name = entry.first;
// interpret --foo as -foo (as long as both are not set)
if (name.find("--") == 0)
{
std::string singleDash(name.begin()+1, name.end());
if (mapArgs.count(singleDash) == 0)
mapArgs[singleDash] = entry.second;
name = singleDash;
}
// interpret -nofoo as -foo=0 (and -nofoo=0 as -foo=1) as long as -foo not set
InterpretNegativeSetting(name, mapArgs);
}
}
std::string GetArg(const std::string& strArg, const std::string& strDefault)
{
if (mapArgs.count(strArg))
return mapArgs[strArg];
return strDefault;
}
int64_t GetArg(const std::string& strArg, int64_t nDefault)
{
if (mapArgs.count(strArg))
return atoi64(mapArgs[strArg]);
return nDefault;
}
bool GetBoolArg(const std::string& strArg, bool fDefault)
{
if (mapArgs.count(strArg))
{
if (mapArgs[strArg].empty())
return true;
return (atoi(mapArgs[strArg]) != 0);
}
return fDefault;
}
bool SoftSetArg(const std::string& strArg, const std::string& strValue)
{
if (mapArgs.count(strArg))
return false;
mapArgs[strArg] = strValue;
return true;
}
bool SoftSetBoolArg(const std::string& strArg, bool fValue)
{
if (fValue)
return SoftSetArg(strArg, std::string("1"));
else
return SoftSetArg(strArg, std::string("0"));
}
string EncodeBase64(const unsigned char* pch, size_t len)
{
static const char *pbase64 = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
string strRet="";
strRet.reserve((len+2)/3*4);
int mode=0, left=0;
const unsigned char *pchEnd = pch+len;
while (pch<pchEnd)
{
int enc = *(pch++);
switch (mode)
{
case 0: // we have no bits
strRet += pbase64[enc >> 2];
left = (enc & 3) << 4;
mode = 1;
break;
case 1: // we have two bits
strRet += pbase64[left | (enc >> 4)];
left = (enc & 15) << 2;
mode = 2;
break;
case 2: // we have four bits
strRet += pbase64[left | (enc >> 6)];
strRet += pbase64[enc & 63];
mode = 0;
break;
}
}
if (mode)
{
strRet += pbase64[left];
strRet += '=';
if (mode == 1)
strRet += '=';
}
return strRet;
}
string EncodeBase64(const string& str)
{
return EncodeBase64((const unsigned char*)str.c_str(), str.size());
}
vector<unsigned char> DecodeBase64(const char* p, bool* pfInvalid)
{
static const int decode64_table[256] =
{
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, 62, -1, -1, -1, 63, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1,
-1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28,
29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48,
49, 50, 51, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
if (pfInvalid)
*pfInvalid = false;
vector<unsigned char> vchRet;
vchRet.reserve(strlen(p)*3/4);
int mode = 0;
int left = 0;
while (1)
{
int dec = decode64_table[(unsigned char)*p];
if (dec == -1) break;
p++;
switch (mode)
{
case 0: // we have no bits and get 6
left = dec;
mode = 1;
break;
case 1: // we have 6 bits and keep 4
vchRet.push_back((left<<2) | (dec>>4));
left = dec & 15;
mode = 2;
break;
case 2: // we have 4 bits and get 6, we keep 2
vchRet.push_back((left<<4) | (dec>>2));
left = dec & 3;
mode = 3;
break;
case 3: // we have 2 bits and get 6
vchRet.push_back((left<<6) | dec);
mode = 0;
break;
}
}
if (pfInvalid)
switch (mode)
{
case 0: // 4n base64 characters processed: ok
break;
case 1: // 4n+1 base64 character processed: impossible
*pfInvalid = true;
break;
case 2: // 4n+2 base64 characters processed: require '=='
if (left || p[0] != '=' || p[1] != '=' || decode64_table[(unsigned char)p[2]] != -1)
*pfInvalid = true;
break;
case 3: // 4n+3 base64 characters processed: require '='
if (left || p[0] != '=' || decode64_table[(unsigned char)p[1]] != -1)
*pfInvalid = true;
break;
}
return vchRet;
}
string DecodeBase64(const string& str)
{
vector<unsigned char> vchRet = DecodeBase64(str.c_str());
return string((const char*)&vchRet[0], vchRet.size());
}
string EncodeBase32(const unsigned char* pch, size_t len)
{
static const char *pbase32 = "abcdefghijklmnopqrstuvwxyz234567";
string strRet="";
strRet.reserve((len+4)/5*8);
int mode=0, left=0;
const unsigned char *pchEnd = pch+len;
while (pch<pchEnd)
{
int enc = *(pch++);
switch (mode)
{
case 0: // we have no bits
strRet += pbase32[enc >> 3];
left = (enc & 7) << 2;
mode = 1;
break;
case 1: // we have three bits
strRet += pbase32[left | (enc >> 6)];
strRet += pbase32[(enc >> 1) & 31];
left = (enc & 1) << 4;
mode = 2;
break;
case 2: // we have one bit
strRet += pbase32[left | (enc >> 4)];
left = (enc & 15) << 1;
mode = 3;
break;
case 3: // we have four bits
strRet += pbase32[left | (enc >> 7)];
strRet += pbase32[(enc >> 2) & 31];
left = (enc & 3) << 3;
mode = 4;
break;
case 4: // we have two bits
strRet += pbase32[left | (enc >> 5)];
strRet += pbase32[enc & 31];
mode = 0;
}
}
static const int nPadding[5] = {0, 6, 4, 3, 1};
if (mode)
{
strRet += pbase32[left];
for (int n=0; n<nPadding[mode]; n++)
strRet += '=';
}
return strRet;
}
string EncodeBase32(const string& str)
{
return EncodeBase32((const unsigned char*)str.c_str(), str.size());
}
vector<unsigned char> DecodeBase32(const char* p, bool* pfInvalid)
{
static const int decode32_table[256] =
{
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, -1, -1, -1, -1,
-1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 0, 1, 2,
3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
23, 24, 25, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1
};
if (pfInvalid)
*pfInvalid = false;
vector<unsigned char> vchRet;
vchRet.reserve((strlen(p))*5/8);
int mode = 0;
int left = 0;
while (1)
{
int dec = decode32_table[(unsigned char)*p];
if (dec == -1) break;
p++;
switch (mode)
{
case 0: // we have no bits and get 5
left = dec;
mode = 1;
break;
case 1: // we have 5 bits and keep 2
vchRet.push_back((left<<3) | (dec>>2));
left = dec & 3;
mode = 2;
break;
case 2: // we have 2 bits and keep 7
left = left << 5 | dec;
mode = 3;
break;
case 3: // we have 7 bits and keep 4
vchRet.push_back((left<<1) | (dec>>4));
left = dec & 15;
mode = 4;
break;
case 4: // we have 4 bits, and keep 1
vchRet.push_back((left<<4) | (dec>>1));
left = dec & 1;
mode = 5;
break;
case 5: // we have 1 bit, and keep 6
left = left << 5 | dec;
mode = 6;
break;
case 6: // we have 6 bits, and keep 3
vchRet.push_back((left<<2) | (dec>>3));
left = dec & 7;
mode = 7;
break;
case 7: // we have 3 bits, and keep 0
vchRet.push_back((left<<5) | dec);
mode = 0;
break;
}
}
if (pfInvalid)
switch (mode)
{
case 0: // 8n base32 characters processed: ok
break;
case 1: // 8n+1 base32 characters processed: impossible
case 3: // +3
case 6: // +6
*pfInvalid = true;
break;
case 2: // 8n+2 base32 characters processed: require '======'
if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || p[3] != '=' || p[4] != '=' || p[5] != '=' || decode32_table[(unsigned char)p[6]] != -1)
*pfInvalid = true;
break;
case 4: // 8n+4 base32 characters processed: require '===='
if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || p[3] != '=' || decode32_table[(unsigned char)p[4]] != -1)
*pfInvalid = true;
break;
case 5: // 8n+5 base32 characters processed: require '==='
if (left || p[0] != '=' || p[1] != '=' || p[2] != '=' || decode32_table[(unsigned char)p[3]] != -1)
*pfInvalid = true;
break;
case 7: // 8n+7 base32 characters processed: require '='
if (left || p[0] != '=' || decode32_table[(unsigned char)p[1]] != -1)
*pfInvalid = true;
break;
}
return vchRet;
}
string DecodeBase32(const string& str)
{
vector<unsigned char> vchRet = DecodeBase32(str.c_str());
return string((const char*)&vchRet[0], vchRet.size());
}
static std::string FormatException(std::exception* pex, const char* pszThread)
{
#ifdef WIN32
char pszModule[MAX_PATH] = "";
GetModuleFileNameA(NULL, pszModule, sizeof(pszModule));
#else
const char* pszModule = "bitcoin";
#endif
if (pex)
return strprintf(
"EXCEPTION: %s \n%s \n%s in %s \n", typeid(*pex).name(), pex->what(), pszModule, pszThread);
else
return strprintf(
"UNKNOWN EXCEPTION \n%s in %s \n", pszModule, pszThread);
}
void PrintExceptionContinue(std::exception* pex, const char* pszThread)
{
std::string message = FormatException(pex, pszThread);
LogPrintf("\n\n************************\n%s\n", message);
fprintf(stderr, "\n\n************************\n%s\n", message.c_str());
strMiscWarning = message;
}
boost::filesystem::path GetDefaultDataDir()
{
namespace fs = boost::filesystem;
// Windows < Vista: C:\Documents and Settings\Username\Application Data\Bitcoin
// Windows >= Vista: C:\Users\Username\AppData\Roaming\Bitcoin
// Mac: ~/Library/Application Support/Bitcoin
// Unix: ~/.bitcoin
#ifdef WIN32
// Windows
return GetSpecialFolderPath(CSIDL_APPDATA) / "Bitcoin";
#else
fs::path pathRet;
char* pszHome = getenv("HOME");
if (pszHome == NULL || strlen(pszHome) == 0)
pathRet = fs::path("/");
else
pathRet = fs::path(pszHome);
#ifdef MAC_OSX
// Mac
pathRet /= "Library/Application Support";
TryCreateDirectory(pathRet);
return pathRet / "Bitcoin";
#else
// Unix
return pathRet / ".bitcoin";
#endif
#endif
}
static boost::filesystem::path pathCached[CChainParams::MAX_NETWORK_TYPES+1];
static CCriticalSection csPathCached;
const boost::filesystem::path &GetDataDir(bool fNetSpecific)
{
namespace fs = boost::filesystem;
LOCK(csPathCached);
int nNet = CChainParams::MAX_NETWORK_TYPES;
if (fNetSpecific) nNet = Params().NetworkID();
fs::path &path = pathCached[nNet];
// This can be called during exceptions by LogPrintf(), so we cache the
// value so we don't have to do memory allocations after that.
if (!path.empty())
return path;
if (mapArgs.count("-datadir")) {
path = fs::system_complete(mapArgs["-datadir"]);
if (!fs::is_directory(path)) {
path = "";
return path;
}
} else {
path = GetDefaultDataDir();
}
if (fNetSpecific)
path /= Params().DataDir();
fs::create_directories(path);
return path;
}
void ClearDatadirCache()
{
std::fill(&pathCached[0], &pathCached[CChainParams::MAX_NETWORK_TYPES+1],
boost::filesystem::path());
}
boost::filesystem::path GetConfigFile()
{
boost::filesystem::path pathConfigFile(GetArg("-conf", "bitcoin.conf"));
if (!pathConfigFile.is_complete())
pathConfigFile = GetDataDir(false) / pathConfigFile;
return pathConfigFile;
}
void ReadConfigFile(map<string, string>& mapSettingsRet,
map<string, vector<string> >& mapMultiSettingsRet)
{
boost::filesystem::ifstream streamConfig(GetConfigFile());
if (!streamConfig.good())
return; // No bitcoin.conf file is OK
set<string> setOptions;
setOptions.insert("*");
for (boost::program_options::detail::config_file_iterator it(streamConfig, setOptions), end; it != end; ++it)
{
// Don't overwrite existing settings so command line settings override bitcoin.conf
string strKey = string("-") + it->string_key;
if (mapSettingsRet.count(strKey) == 0)
{
mapSettingsRet[strKey] = it->value[0];
// interpret nofoo=1 as foo=0 (and nofoo=0 as foo=1) as long as foo not set)
InterpretNegativeSetting(strKey, mapSettingsRet);
}
mapMultiSettingsRet[strKey].push_back(it->value[0]);
}
// If datadir is changed in .conf file:
ClearDatadirCache();
}
boost::filesystem::path GetPidFile()
{
boost::filesystem::path pathPidFile(GetArg("-pid", "bitcoind.pid"));
if (!pathPidFile.is_complete()) pathPidFile = GetDataDir() / pathPidFile;
return pathPidFile;
}
#ifndef WIN32
void CreatePidFile(const boost::filesystem::path &path, pid_t pid)
{
FILE* file = fopen(path.string().c_str(), "w");
if (file)
{
fprintf(file, "%d\n", pid);
fclose(file);
}
}
#endif
bool RenameOver(boost::filesystem::path src, boost::filesystem::path dest)
{
#ifdef WIN32
return MoveFileExA(src.string().c_str(), dest.string().c_str(),
MOVEFILE_REPLACE_EXISTING);
#else
int rc = std::rename(src.string().c_str(), dest.string().c_str());
return (rc == 0);
#endif /* WIN32 */
}
// Ignores exceptions thrown by Boost's create_directory if the requested directory exists.
// Specifically handles case where path p exists, but it wasn't possible for the user to
// write to the parent directory.
bool TryCreateDirectory(const boost::filesystem::path& p)
{
try
{
return boost::filesystem::create_directory(p);
} catch (boost::filesystem::filesystem_error) {
if (!boost::filesystem::exists(p) || !boost::filesystem::is_directory(p))
throw;
}
// create_directory didn't create the directory, it had to have existed already
return false;
}
void FileCommit(FILE *fileout)
{
fflush(fileout); // harmless if redundantly called
#ifdef WIN32
HANDLE hFile = (HANDLE)_get_osfhandle(_fileno(fileout));
FlushFileBuffers(hFile);
#else
#if defined(__linux__) || defined(__NetBSD__)
fdatasync(fileno(fileout));
#elif defined(__APPLE__) && defined(F_FULLFSYNC)
fcntl(fileno(fileout), F_FULLFSYNC, 0);
#else
fsync(fileno(fileout));
#endif
#endif
}
bool TruncateFile(FILE *file, unsigned int length) {
#if defined(WIN32)
return _chsize(_fileno(file), length) == 0;
#else
return ftruncate(fileno(file), length) == 0;
#endif
}
// this function tries to raise the file descriptor limit to the requested number.
// It returns the actual file descriptor limit (which may be more or less than nMinFD)
int RaiseFileDescriptorLimit(int nMinFD) {
#if defined(WIN32)
return 2048;
#else
struct rlimit limitFD;
if (getrlimit(RLIMIT_NOFILE, &limitFD) != -1) {
if (limitFD.rlim_cur < (rlim_t)nMinFD) {
limitFD.rlim_cur = nMinFD;
if (limitFD.rlim_cur > limitFD.rlim_max)
limitFD.rlim_cur = limitFD.rlim_max;
setrlimit(RLIMIT_NOFILE, &limitFD);
getrlimit(RLIMIT_NOFILE, &limitFD);
}
return limitFD.rlim_cur;
}
return nMinFD; // getrlimit failed, assume it's fine
#endif
}
// this function tries to make a particular range of a file allocated (corresponding to disk space)
// it is advisory, and the range specified in the arguments will never contain live data
void AllocateFileRange(FILE *file, unsigned int offset, unsigned int length) {
#if defined(WIN32)
// Windows-specific version
HANDLE hFile = (HANDLE)_get_osfhandle(_fileno(file));
LARGE_INTEGER nFileSize;
int64_t nEndPos = (int64_t)offset + length;
nFileSize.u.LowPart = nEndPos & 0xFFFFFFFF;
nFileSize.u.HighPart = nEndPos >> 32;
SetFilePointerEx(hFile, nFileSize, 0, FILE_BEGIN);
SetEndOfFile(hFile);
#elif defined(MAC_OSX)
// OSX specific version
fstore_t fst;
fst.fst_flags = F_ALLOCATECONTIG;
fst.fst_posmode = F_PEOFPOSMODE;
fst.fst_offset = 0;
fst.fst_length = (off_t)offset + length;
fst.fst_bytesalloc = 0;
if (fcntl(fileno(file), F_PREALLOCATE, &fst) == -1) {
fst.fst_flags = F_ALLOCATEALL;
fcntl(fileno(file), F_PREALLOCATE, &fst);
}
ftruncate(fileno(file), fst.fst_length);
#elif defined(__linux__)
// Version using posix_fallocate
off_t nEndPos = (off_t)offset + length;
posix_fallocate(fileno(file), 0, nEndPos);
#else
// Fallback version
// TODO: just write one byte per block
static const char buf[65536] = {};
fseek(file, offset, SEEK_SET);
while (length > 0) {
unsigned int now = 65536;
if (length < now)
now = length;
fwrite(buf, 1, now, file); // allowed to fail; this function is advisory anyway
length -= now;
}
#endif
}
void ShrinkDebugFile()
{
// Scroll debug.log if it's getting too big
boost::filesystem::path pathLog = GetDataDir() / "debug.log";
FILE* file = fopen(pathLog.string().c_str(), "r");
if (file && boost::filesystem::file_size(pathLog) > 10 * 1000000)
{
// Restart the file with some of the end
char pch[200000];
fseek(file, -sizeof(pch), SEEK_END);
int nBytes = fread(pch, 1, sizeof(pch), file);
fclose(file);
file = fopen(pathLog.string().c_str(), "w");
if (file)
{
fwrite(pch, 1, nBytes, file);
fclose(file);
}
}
else if (file != NULL)
fclose(file);
}
//
// "Never go to sea with two chronometers; take one or three."
// Our three time sources are:
// - System clock
// - Median of other nodes clocks
// - The user (asking the user to fix the system clock if the first two disagree)
//
static int64_t nMockTime = 0; // For unit testing
int64_t GetTime()
{
if (nMockTime) return nMockTime;
return time(NULL);
}
void SetMockTime(int64_t nMockTimeIn)
{
nMockTime = nMockTimeIn;
}
static CCriticalSection cs_nTimeOffset;
static int64_t nTimeOffset = 0;
int64_t GetTimeOffset()
{
LOCK(cs_nTimeOffset);
return nTimeOffset;
}
int64_t GetAdjustedTime()
{
return GetTime() + GetTimeOffset();
}
void AddTimeData(const CNetAddr& ip, int64_t nTime)
{
int64_t nOffsetSample = nTime - GetTime();
LOCK(cs_nTimeOffset);
// Ignore duplicates
static set<CNetAddr> setKnown;
if (!setKnown.insert(ip).second)
return;
// Add data
static CMedianFilter<int64_t> vTimeOffsets(200,0);
vTimeOffsets.input(nOffsetSample);
LogPrintf("Added time data, samples %d, offset %+d (%+d minutes)\n", vTimeOffsets.size(), nOffsetSample, nOffsetSample/60);
if (vTimeOffsets.size() >= 5 && vTimeOffsets.size() % 2 == 1)
{
int64_t nMedian = vTimeOffsets.median();
std::vector<int64_t> vSorted = vTimeOffsets.sorted();
// Only let other nodes change our time by so much
if (abs64(nMedian) < 70 * 60)
{
nTimeOffset = nMedian;
}
else
{
nTimeOffset = 0;
static bool fDone;
if (!fDone)
{
// If nobody has a time different than ours but within 5 minutes of ours, give a warning
bool fMatch = false;
BOOST_FOREACH(int64_t nOffset, vSorted)
if (nOffset != 0 && abs64(nOffset) < 5 * 60)
fMatch = true;
if (!fMatch)
{
fDone = true;
string strMessage = _("Warning: Please check that your computer's date and time are correct! If your clock is wrong Bitcoin will not work properly.");
strMiscWarning = strMessage;
LogPrintf("*** %s\n", strMessage);
uiInterface.ThreadSafeMessageBox(strMessage, "", CClientUIInterface::MSG_WARNING);
}
}
}
if (fDebug) {
BOOST_FOREACH(int64_t n, vSorted)
LogPrintf("%+d ", n);
LogPrintf("| ");
}
LogPrintf("nTimeOffset = %+d (%+d minutes)\n", nTimeOffset, nTimeOffset/60);
}
}
uint32_t insecure_rand_Rz = 11;
uint32_t insecure_rand_Rw = 11;
void seed_insecure_rand(bool fDeterministic)
{
//The seed values have some unlikely fixed points which we avoid.
if(fDeterministic)
{
insecure_rand_Rz = insecure_rand_Rw = 11;
} else {
uint32_t tmp;
do {
RAND_bytes((unsigned char*)&tmp, 4);
} while(tmp == 0 || tmp == 0x9068ffffU);
insecure_rand_Rz = tmp;
do {
RAND_bytes((unsigned char*)&tmp, 4);
} while(tmp == 0 || tmp == 0x464fffffU);
insecure_rand_Rw = tmp;
}
}
string FormatVersion(int nVersion)
{
if (nVersion%100 == 0)
return strprintf("%d.%d.%d", nVersion/1000000, (nVersion/10000)%100, (nVersion/100)%100);
else
return strprintf("%d.%d.%d.%d", nVersion/1000000, (nVersion/10000)%100, (nVersion/100)%100, nVersion%100);
}
string FormatFullVersion()
{
return CLIENT_BUILD;
}
// Format the subversion field according to BIP 14 spec (https://en.bitcoin.it/wiki/BIP_0014)
std::string FormatSubVersion(const std::string& name, int nClientVersion, const std::vector<std::string>& comments)
{
std::ostringstream ss;
ss << "/";
ss << name << ":" << FormatVersion(nClientVersion);
if (!comments.empty())
ss << "(" << boost::algorithm::join(comments, "; ") << ")";
ss << "/";
return ss.str();
}
#ifdef WIN32
boost::filesystem::path GetSpecialFolderPath(int nFolder, bool fCreate)
{
namespace fs = boost::filesystem;
char pszPath[MAX_PATH] = "";
if(SHGetSpecialFolderPathA(NULL, pszPath, nFolder, fCreate))
{
return fs::path(pszPath);
}
LogPrintf("SHGetSpecialFolderPathA() failed, could not obtain requested path.\n");
return fs::path("");
}
#endif
boost::filesystem::path GetTempPath() {
#if BOOST_FILESYSTEM_VERSION == 3
return boost::filesystem::temp_directory_path();
#else
// TODO: remove when we don't support filesystem v2 anymore
boost::filesystem::path path;
#ifdef WIN32
char pszPath[MAX_PATH] = "";
if (GetTempPathA(MAX_PATH, pszPath))
path = boost::filesystem::path(pszPath);
#else
path = boost::filesystem::path("/tmp");
#endif
if (path.empty() || !boost::filesystem::is_directory(path)) {
LogPrintf("GetTempPath(): failed to find temp path\n");
return boost::filesystem::path("");
}
return path;
#endif
}
void runCommand(std::string strCommand)
{
int nErr = ::system(strCommand.c_str());
if (nErr)
LogPrintf("runCommand error: system(%s) returned %d\n", strCommand, nErr);
}
void RenameThread(const char* name)
{
#if defined(PR_SET_NAME)
// Only the first 15 characters are used (16 - NUL terminator)
::prctl(PR_SET_NAME, name, 0, 0, 0);
#elif 0 && (defined(__FreeBSD__) || defined(__OpenBSD__))
// TODO: This is currently disabled because it needs to be verified to work
// on FreeBSD or OpenBSD first. When verified the '0 &&' part can be
// removed.
pthread_set_name_np(pthread_self(), name);
#elif defined(MAC_OSX) && defined(__MAC_OS_X_VERSION_MAX_ALLOWED)
// pthread_setname_np is XCode 10.6-and-later
#if __MAC_OS_X_VERSION_MAX_ALLOWED >= 1060
pthread_setname_np(name);
#endif
#else
// Prevent warnings for unused parameters...
(void)name;
#endif
}
bool ParseInt32(const std::string& str, int32_t *out)
{
char *endp = NULL;
errno = 0; // strtol will not set errno if valid
long int n = strtol(str.c_str(), &endp, 10);
if(out) *out = (int)n;
// Note that strtol returns a *long int*, so even if strtol doesn't report a over/underflow
// we still have to check that the returned value is within the range of an *int32_t*. On 64-bit
// platforms the size of these types may be different.
return endp && *endp == 0 && !errno &&
n >= std::numeric_limits<int32_t>::min() &&
n <= std::numeric_limits<int32_t>::max();
}
void SetupEnvironment()
{
#ifndef WIN32
try
{
#if BOOST_FILESYSTEM_VERSION == 3
boost::filesystem::path::codecvt(); // Raises runtime error if current locale is invalid
#else // boost filesystem v2
std::locale(); // Raises runtime error if current locale is invalid
#endif
} catch(std::runtime_error &e)
{
setenv("LC_ALL", "C", 1); // Force C locale
}
#endif
}
std::string DateTimeStrFormat(const char* pszFormat, int64_t nTime)
{
// std::locale takes ownership of the pointer
std::locale loc(std::locale::classic(), new boost::posix_time::time_facet(pszFormat));
std::stringstream ss;
ss.imbue(loc);
ss << boost::posix_time::from_time_t(nTime);
return ss.str();
}
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