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blockchain/src/common/util.cpp
2019-09-24 17:49:04 +03:00

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// Copyright (c) 2014-2018 Zano Project
// Copyright (c) 2014-2018 The Louisdor Project
// Copyright (c) 2012-2013 The Cryptonote developers
// Distributed under the MIT/X11 software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
#include "include_base_utils.h"
#include "zlib_helper.h"
using namespace epee;
#include "util.h"
#include "currency_core/currency_config.h"
#include "version.h"
#ifdef WIN32
#include <windows.h>
#include <shlobj.h>
#include <strsafe.h>
#include <lm.h>
#pragma comment(lib, "netapi32.lib")
#else
#include <sys/utsname.h>
#endif
#include <boost/asio.hpp>
#include "string_coding.h"
namespace tools
{
std::function<void(void)> signal_handler::m_handler;
std::function<void(int, void*)> signal_handler::m_fatal_handler;
#ifdef WIN32
bool GetWinMajorMinorVersion(DWORD& major, DWORD& minor)
{
bool bRetCode = false;
LPBYTE pinfoRawData = 0;
if (NERR_Success == NetWkstaGetInfo(NULL, 100, &pinfoRawData))
{
WKSTA_INFO_100* pworkstationInfo = (WKSTA_INFO_100*)pinfoRawData;
major = pworkstationInfo->wki100_ver_major;
minor = pworkstationInfo->wki100_ver_minor;
::NetApiBufferFree(pinfoRawData);
bRetCode = true;
}
return bRetCode;
}
std::string get_windows_version_display_string()
{
std::string winver;
OSVERSIONINFOEX osver;
SYSTEM_INFO sysInfo;
typedef void(__stdcall *GETSYSTEMINFO) (LPSYSTEM_INFO);
#pragma warning (push)
#pragma warning (disable:4996)
memset(&osver, 0, sizeof(osver));
osver.dwOSVersionInfoSize = sizeof(osver);
GetVersionEx((LPOSVERSIONINFO)&osver);
#pragma warning (pop)
DWORD major = 0;
DWORD minor = 0;
if (GetWinMajorMinorVersion(major, minor))
{
osver.dwMajorVersion = major;
osver.dwMinorVersion = minor;
}
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 2)
{
OSVERSIONINFOEXW osvi;
ULONGLONG cm = 0;
cm = VerSetConditionMask(cm, VER_MINORVERSION, VER_EQUAL);
ZeroMemory(&osvi, sizeof(osvi));
osvi.dwOSVersionInfoSize = sizeof(osvi);
osvi.dwMinorVersion = 3;
if (VerifyVersionInfoW(&osvi, VER_MINORVERSION, cm))
{
osver.dwMinorVersion = 3;
}
}
GETSYSTEMINFO getSysInfo = (GETSYSTEMINFO)GetProcAddress(GetModuleHandleA("kernel32.dll"), "GetNativeSystemInfo");
if (getSysInfo == NULL) getSysInfo = ::GetSystemInfo;
getSysInfo(&sysInfo);
if (osver.dwMajorVersion == 10 && osver.dwMinorVersion >= 0 && osver.wProductType != VER_NT_WORKSTATION) winver = "Windows 10 Server";
else if (osver.dwMajorVersion == 10 && osver.dwMinorVersion >= 0 && osver.wProductType == VER_NT_WORKSTATION) winver = "Windows 10";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 3 && osver.wProductType != VER_NT_WORKSTATION) winver = "Windows Server 2012 R2";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 3 && osver.wProductType == VER_NT_WORKSTATION) winver = "Windows 8.1";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 2 && osver.wProductType != VER_NT_WORKSTATION) winver = "Windows Server 2012";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 2 && osver.wProductType == VER_NT_WORKSTATION) winver = "Windows 8";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 1 && osver.wProductType != VER_NT_WORKSTATION) winver = "Windows Server 2008 R2";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 1 && osver.wProductType == VER_NT_WORKSTATION) winver = "Windows 7";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 0 && osver.wProductType != VER_NT_WORKSTATION) winver = "Windows Server 2008";
else if (osver.dwMajorVersion == 6 && osver.dwMinorVersion == 0 && osver.wProductType == VER_NT_WORKSTATION) winver = "Windows Vista";
else if (osver.dwMajorVersion == 5 && osver.dwMinorVersion == 2 && osver.wProductType == VER_NT_WORKSTATION
&& sysInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
winver = "Windows XP x64";
else if (osver.dwMajorVersion == 5 && osver.dwMinorVersion == 2) winver = "Windows Server 2003";
else if (osver.dwMajorVersion == 5 && osver.dwMinorVersion == 1) winver = "Windows XP";
else if (osver.dwMajorVersion == 5 && osver.dwMinorVersion == 0) winver = "Windows 2000";
else winver = "unknown";
if (osver.wServicePackMajor != 0)
{
std::string sp;
char buf[128] = { 0 };
sp = " Service Pack ";
sprintf_s(buf, sizeof(buf), "%hd", osver.wServicePackMajor);
sp.append(buf);
winver += sp;
}
if (osver.dwMajorVersion >= 6)
{
if (sysInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_AMD64)
winver += ", 64-bit";
else if (sysInfo.wProcessorArchitecture == PROCESSOR_ARCHITECTURE_INTEL)
winver += ", 32-bit";
}
winver += "("
+ std::to_string(osver.dwMajorVersion) + ":"
+ std::to_string(osver.dwMinorVersion) + ":"
+ std::to_string(osver.dwBuildNumber) + ":"
+ std::to_string(osver.dwPlatformId) + ":"
+ std::to_string(osver.wServicePackMajor) + ":"
+ std::to_string(osver.wServicePackMinor) + ":"
+ std::to_string(osver.wSuiteMask) + ":"
+ std::to_string(osver.wProductType) + ")";
return winver;
}
std::string get_windows_version_display_string_()
{
typedef void (WINAPI *PGNSI)(LPSYSTEM_INFO);
typedef BOOL (WINAPI *PGPI)(DWORD, DWORD, DWORD, DWORD, PDWORD);
#define BUFSIZE 10000
char pszOS[BUFSIZE] = {0};
OSVERSIONINFOEX osvi;
SYSTEM_INFO si;
PGNSI pGNSI;
PGPI pGPI;
BOOL bOsVersionInfoEx;
DWORD dwType;
ZeroMemory(&si, sizeof(SYSTEM_INFO));
ZeroMemory(&osvi, sizeof(OSVERSIONINFOEX));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
bOsVersionInfoEx = GetVersionEx((OSVERSIONINFO*) &osvi);
if(!bOsVersionInfoEx) return pszOS;
// Call GetNativeSystemInfo if supported or GetSystemInfo otherwise.
pGNSI = (PGNSI) GetProcAddress(
GetModuleHandle(TEXT("kernel32.dll")),
"GetNativeSystemInfo");
if(NULL != pGNSI)
pGNSI(&si);
else GetSystemInfo(&si);
if ( VER_PLATFORM_WIN32_NT==osvi.dwPlatformId &&
osvi.dwMajorVersion > 4 )
{
StringCchCopy(pszOS, BUFSIZE, TEXT("Microsoft "));
// Test for the specific product.
if ( osvi.dwMajorVersion == 6 )
{
if( osvi.dwMinorVersion == 0 )
{
if( osvi.wProductType == VER_NT_WORKSTATION )
StringCchCat(pszOS, BUFSIZE, TEXT("Windows Vista "));
else StringCchCat(pszOS, BUFSIZE, TEXT("Windows Server 2008 " ));
}
if ( osvi.dwMinorVersion == 1 )
{
if( osvi.wProductType == VER_NT_WORKSTATION )
StringCchCat(pszOS, BUFSIZE, TEXT("Windows 7 "));
else StringCchCat(pszOS, BUFSIZE, TEXT("Windows Server 2008 R2 " ));
}
pGPI = (PGPI) GetProcAddress(
GetModuleHandle(TEXT("kernel32.dll")),
"GetProductInfo");
pGPI( osvi.dwMajorVersion, osvi.dwMinorVersion, 0, 0, &dwType);
switch( dwType )
{
case PRODUCT_ULTIMATE:
StringCchCat(pszOS, BUFSIZE, TEXT("Ultimate Edition" ));
break;
case PRODUCT_PROFESSIONAL:
StringCchCat(pszOS, BUFSIZE, TEXT("Professional" ));
break;
case PRODUCT_HOME_PREMIUM:
StringCchCat(pszOS, BUFSIZE, TEXT("Home Premium Edition" ));
break;
case PRODUCT_HOME_BASIC:
StringCchCat(pszOS, BUFSIZE, TEXT("Home Basic Edition" ));
break;
case PRODUCT_ENTERPRISE:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition" ));
break;
case PRODUCT_BUSINESS:
StringCchCat(pszOS, BUFSIZE, TEXT("Business Edition" ));
break;
case PRODUCT_STARTER:
StringCchCat(pszOS, BUFSIZE, TEXT("Starter Edition" ));
break;
case PRODUCT_CLUSTER_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Cluster Server Edition" ));
break;
case PRODUCT_DATACENTER_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Datacenter Edition" ));
break;
case PRODUCT_DATACENTER_SERVER_CORE:
StringCchCat(pszOS, BUFSIZE, TEXT("Datacenter Edition (core installation)" ));
break;
case PRODUCT_ENTERPRISE_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition" ));
break;
case PRODUCT_ENTERPRISE_SERVER_CORE:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition (core installation)" ));
break;
case PRODUCT_ENTERPRISE_SERVER_IA64:
StringCchCat(pszOS, BUFSIZE, TEXT("Enterprise Edition for Itanium-based Systems" ));
break;
case PRODUCT_SMALLBUSINESS_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Small Business Server" ));
break;
case PRODUCT_SMALLBUSINESS_SERVER_PREMIUM:
StringCchCat(pszOS, BUFSIZE, TEXT("Small Business Server Premium Edition" ));
break;
case PRODUCT_STANDARD_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Standard Edition" ));
break;
case PRODUCT_STANDARD_SERVER_CORE:
StringCchCat(pszOS, BUFSIZE, TEXT("Standard Edition (core installation)" ));
break;
case PRODUCT_WEB_SERVER:
StringCchCat(pszOS, BUFSIZE, TEXT("Web Server Edition" ));
break;
}
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 2 )
{
if( GetSystemMetrics(SM_SERVERR2) )
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows Server 2003 R2, "));
else if ( osvi.wSuiteMask & VER_SUITE_STORAGE_SERVER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows Storage Server 2003"));
else if ( osvi.wSuiteMask & VER_SUITE_WH_SERVER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows Home Server"));
else if( osvi.wProductType == VER_NT_WORKSTATION &&
si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64)
{
StringCchCat(pszOS, BUFSIZE, TEXT( "Windows XP Professional x64 Edition"));
}
else StringCchCat(pszOS, BUFSIZE, TEXT("Windows Server 2003, "));
// Test for the server type.
if ( osvi.wProductType != VER_NT_WORKSTATION )
{
if ( si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_IA64 )
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter Edition for Itanium-based Systems" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Enterprise Edition for Itanium-based Systems" ));
}
else if ( si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64 )
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter x64 Edition" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Enterprise x64 Edition" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Standard x64 Edition" ));
}
else
{
if ( osvi.wSuiteMask & VER_SUITE_COMPUTE_SERVER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Compute Cluster Edition" ));
else if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter Edition" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Enterprise Edition" ));
else if ( osvi.wSuiteMask & VER_SUITE_BLADE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Web Edition" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Standard Edition" ));
}
}
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1 )
{
StringCchCat(pszOS, BUFSIZE, TEXT("Windows XP "));
if( osvi.wSuiteMask & VER_SUITE_PERSONAL )
StringCchCat(pszOS, BUFSIZE, TEXT( "Home Edition" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Professional" ));
}
if ( osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0 )
{
StringCchCat(pszOS, BUFSIZE, TEXT("Windows 2000 "));
if ( osvi.wProductType == VER_NT_WORKSTATION )
{
StringCchCat(pszOS, BUFSIZE, TEXT( "Professional" ));
}
else
{
if( osvi.wSuiteMask & VER_SUITE_DATACENTER )
StringCchCat(pszOS, BUFSIZE, TEXT( "Datacenter Server" ));
else if( osvi.wSuiteMask & VER_SUITE_ENTERPRISE )
StringCchCat(pszOS, BUFSIZE, TEXT( "Advanced Server" ));
else StringCchCat(pszOS, BUFSIZE, TEXT( "Server" ));
}
}
// Include service pack (if any) and build number.
if( strlen(osvi.szCSDVersion) > 0 )
{
StringCchCat(pszOS, BUFSIZE, TEXT(" ") );
StringCchCat(pszOS, BUFSIZE, osvi.szCSDVersion);
}
TCHAR buf[80];
StringCchPrintf( buf, 80, TEXT(" (build %d)"), osvi.dwBuildNumber);
StringCchCat(pszOS, BUFSIZE, buf);
if ( osvi.dwMajorVersion >= 6 )
{
if ( si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_AMD64 )
StringCchCat(pszOS, BUFSIZE, TEXT( ", 64-bit" ));
else if (si.wProcessorArchitecture==PROCESSOR_ARCHITECTURE_INTEL )
StringCchCat(pszOS, BUFSIZE, TEXT(", 32-bit"));
}
return pszOS;
}
else
{
printf( "This sample does not support this version of Windows.\n");
return pszOS;
}
}
void signal_handler::GenerateCrashDump(EXCEPTION_POINTERS *pep /* = NULL*/)
{
SYSTEMTIME sysTime = { 0 };
GetSystemTime(&sysTime);
// get the computer name
char compName[MAX_COMPUTERNAME_LENGTH + 1] = { 0 };
DWORD compNameLen = ARRAYSIZE(compName);
GetComputerNameA(compName, &compNameLen);
// build the filename: APPNAME_COMPUTERNAME_DATE_TIME.DMP
char path[MAX_PATH*10] = { 0 };
std::string folder = epee::log_space::log_singletone::get_default_log_folder();
sprintf_s(path, ARRAYSIZE(path),"%s\\crashdump_" PROJECT_VERSION_LONG "_%s_%04u-%02u-%02u_%02u-%02u-%02u.dmp",
folder.c_str(), compName, sysTime.wYear, sysTime.wMonth, sysTime.wDay,
sysTime.wHour, sysTime.wMinute, sysTime.wSecond);
HANDLE hFile = CreateFileA(path, GENERIC_READ | GENERIC_WRITE,
0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
if ((hFile != NULL) && (hFile != INVALID_HANDLE_VALUE))
{
// Create the minidump
MINIDUMP_EXCEPTION_INFORMATION mdei;
mdei.ThreadId = GetCurrentThreadId();
mdei.ExceptionPointers = pep;
mdei.ClientPointers = FALSE;
MINIDUMP_CALLBACK_INFORMATION mci;
mci.CallbackRoutine = (MINIDUMP_CALLBACK_ROUTINE)MyMiniDumpCallback;
mci.CallbackParam = 0;
MINIDUMP_TYPE mdt = (MINIDUMP_TYPE)(MiniDumpWithPrivateReadWriteMemory |
MiniDumpWithDataSegs |
MiniDumpWithHandleData |
MiniDumpWithFullMemoryInfo |
MiniDumpWithThreadInfo |
MiniDumpWithUnloadedModules);
BOOL rv = MiniDumpWriteDump(GetCurrentProcess(), GetCurrentProcessId(),
hFile, mdt, (pep != 0) ? &mdei : 0, 0, &mci);
if (!rv)
{
LOG_ERROR("Minidump file create FAILED(error " << GetLastError() << ") on path: " << path);
}
else
{
LOG_PRINT_L0("Minidump file created on path: " << path);
}
// Close the file
CloseHandle(hFile);
}
else
{
LOG_ERROR("Minidump FAILED to create file (error " << GetLastError() << ") on path: " << path);
}
}
#else // ifdef WIN32
std::string get_nix_version_display_string()
{
utsname un;
if(uname(&un) < 0)
return std::string("*nix: failed to get os version");
return std::string() + un.sysname + " " + un.version + " " + un.release;
}
#endif
std::string get_os_version_string()
{
#ifdef WIN32
return get_windows_version_display_string();
#else
return get_nix_version_display_string();
#endif
}
#ifdef WIN32
std::wstring get_special_folder_path_w(int nfolder, bool iscreate)
{
wchar_t psz_path[MAX_PATH] = L"";
if (SHGetSpecialFolderPathW(NULL, psz_path, nfolder, iscreate))
{
return psz_path;
}
LOG_ERROR("SHGetSpecialFolderPathW(" << nfolder << ", " << iscreate << ") failed, could not obtain requested path.");
return L"";
}
std::string get_special_folder_path_utf8(int nfolder, bool iscreate)
{
return epee::string_encoding::wstring_to_utf8(get_special_folder_path_w(nfolder, iscreate));
}
#endif
std::string get_default_data_dir()
{
//namespace fs = boost::filesystem;
// Windows < Vista: C:\Documents and Settings\Username\Application Data\CURRENCY_NAME_SHORT
// Windows >= Vista: C:\Users\Username\AppData\Roaming\CURRENCY_NAME_SHORT
// Mac: ~/Library/Application Support/CURRENCY_NAME_SHORT
// Unix: ~/.CURRENCY_NAME_SHORT
std::string config_folder;
#ifdef WIN32
// Windows
#ifdef _M_X64
config_folder = get_special_folder_path_utf8(CSIDL_APPDATA, true) + "/" + CURRENCY_NAME_SHORT;
#else
config_folder = get_special_folder_path_utf8(CSIDL_APPDATA, true) + "/" + CURRENCY_NAME_SHORT + "-x86";
#endif
#else
std::string pathRet;
char* pszHome = getenv("HOME");
if (pszHome == NULL || strlen(pszHome) == 0)
pathRet = "/";
else
pathRet = pszHome;
#ifdef __APPLE__
// Mac
pathRet += "/Library/Application Support";
config_folder = (pathRet + "/" + CURRENCY_NAME_SHORT);
#else
// Unix
config_folder = (pathRet + "/." + CURRENCY_NAME_SHORT);
#endif
#endif
return config_folder;
}
std::string get_host_computer_name()
{
char szname[1024] = "";
gethostname(szname, sizeof(szname));
szname[sizeof(szname)-1] = 0; //just to be sure
return szname;
}
std::string get_default_user_dir()
{
//namespace fs = boost::filesystem;
// Windows < Vista: C:\Documents and Settings\Username
// Windows >= Vista: C:\Users\Username\AppData\Roaming\CURRENCY_NAME_SHORT
// Mac: ~/Library/Application Support/CURRENCY_NAME_SHORT
// Unix: ~/.CURRENCY_NAME_SHORT
std::string wallets_dir;
#ifdef WIN32
// Windows
wallets_dir = get_special_folder_path_utf8(CSIDL_PERSONAL, true) + "/" + CURRENCY_NAME_BASE;
#else
std::string pathRet;
char* pszHome = getenv("HOME");
if (pszHome == NULL || strlen(pszHome) == 0)
pathRet = "/";
else
pathRet = pszHome;
wallets_dir = (pathRet + "/" + CURRENCY_NAME_BASE);
#endif
return wallets_dir;
}
std::string get_current_username()
{
#ifdef WIN32
// Windows
const char* psz_username = getenv("USERNAME");
#else
const char* psz_username = getenv("USER");
#endif
if (psz_username == NULL || strlen(psz_username) == 0)
psz_username = "unknown_user";
return std::string(psz_username);
}
bool create_directories_if_necessary(const std::string& path)
{
namespace fs = boost::filesystem;
boost::system::error_code ec;
fs::path fs_path = epee::string_encoding::utf8_to_wstring(path);
if (fs::is_directory(fs_path, ec))
{
return true;
}
bool res = fs::create_directories(fs_path, ec);
if (res)
{
LOG_PRINT_L2("Created directory: " << path);
}
else
{
LOG_PRINT_L2("Can't create directory: " << path << ", err: "<< ec.message());
}
return res;
}
std::error_code replace_file(const std::string& replacement_name, const std::string& replaced_name)
{
int code;
#if defined(WIN32)
// Maximizing chances for success
DWORD attributes = ::GetFileAttributes(replaced_name.c_str());
if (INVALID_FILE_ATTRIBUTES != attributes)
{
::SetFileAttributes(replaced_name.c_str(), attributes & (~FILE_ATTRIBUTE_READONLY));
}
bool ok = 0 != ::MoveFileEx(replacement_name.c_str(), replaced_name.c_str(), MOVEFILE_REPLACE_EXISTING);
code = ok ? 0 : static_cast<int>(::GetLastError());
#else
bool ok = 0 == std::rename(replacement_name.c_str(), replaced_name.c_str());
code = ok ? 0 : errno;
#endif
return std::error_code(code, std::system_category());
}
#define REQUEST_LOG_CHUNK_SIZE_MAX (10 * 1024 * 1024)
bool get_log_chunk_gzipped(uint64_t offset, uint64_t size, std::string& output, std::string& error)
{
if (size > REQUEST_LOG_CHUNK_SIZE_MAX)
{
error = std::string("size is exceeding the limit = ") + epee::string_tools::num_to_string_fast(REQUEST_LOG_CHUNK_SIZE_MAX);
return false;
}
std::string log_filename = epee::log_space::log_singletone::get_actual_log_file_path();
if (std::ifstream log{ log_filename, std::ifstream::ate | std::ifstream::binary })
{
uint64_t file_size = log.tellg();
if (offset >= file_size)
{
error = "offset is out of bounds";
return false;
}
if (offset + size > file_size)
{
error = "offset + size if out of bounds";
return false;
}
if (size != 0)
{
log.seekg(offset);
output.resize(size);
log.read(&output.front(), size);
uint64_t read_bytes = log.gcount();
if (read_bytes != size)
{
error = std::string("read bytes: ") + epee::string_tools::num_to_string_fast(read_bytes);
return false;
}
if (!epee::zlib_helper::pack(output))
{
error = "zlib pack failed";
return false;
}
}
return true;
}
error = std::string("can't open ") + log_filename;
return false;
}
uint64_t get_log_file_size()
{
std::string log_filename = epee::log_space::log_singletone::get_actual_log_file_path();
std::ifstream in(log_filename, std::ifstream::ate | std::ifstream::binary);
return static_cast<uint64_t>(in.tellg());
}
} // namespace tools