我正在尝试在visual studio 2008中编译log4cpp，但是我遇到了一些错误：
Error 26 error C2664: 'ReportEventW' : cannot convert parameter 8 from 'const char *[1]' to 'LPCWSTR *' ...\testlog4cppdll\log4cpp\src\nteventlogappender.cpp 64
Error 19 error C2676: binary '+' : 'std::basic_string<_Elem,_Traits,_Ax>' does not define this operator or a conversion to a type acceptable to the predefined operator ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 11 error C2782: 'std::basic_string<_Elem,_Traits,_Alloc> std::operator +(const std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem *)' : template parameter '_Elem' is ambiguous ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 10 error C2782: 'std::basic_string<_Elem,_Traits,_Alloc> std::operator +(const std::basic_string<_Elem,_Traits,_Alloc> &,const _Elem)' : template parameter '_Elem' is ambiguous ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 18 error C2784: 'std::_Revranit<_RanIt,_Base> std::operator +(_Diff,const std::_Revranit<_RanIt,_Base> &)' : could not deduce template argument for 'const std::_Revranit<_RanIt,_Base> &' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 16 error C2784: 'std::_String_const_iterator<_Elem,_Traits,_Alloc> std::operator +(_String_const_iterator<_Elem,_Traits,_Alloc>::difference_type,std::_String_const_iterator<_Elem,_Traits,_Alloc>)' : could not deduce template argument for 'std::_String_const_iterator<_Elem,_Traits,_Alloc>' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 15 error C2784: 'std::_String_iterator<_Elem,_Traits,_Alloc> std::operator +(_String_iterator<_Elem,_Traits,_Alloc>::difference_type,std::_String_iterator<_Elem,_Traits,_Alloc>)' : could not deduce template argument for 'std::_String_iterator<_Elem,_Traits,_Alloc>' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 7 error C2784: 'std::_Vb_const_iterator<_Sizet,_Difft,_MycontTy> std::operator +(_Difft,std::_Vb_const_iterator<_Sizet,_Difft,_MycontTy>)' : could not deduce template argument for 'std::_Vb_const_iterator<_Sizet,_Difft,_MycontTy>' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 6 error C2784: 'std::_Vb_iterator<_Sizet,_Difft,_MycontTy> std::operator +(_Difft,std::_Vb_iterator<_Sizet,_Difft,_MycontTy>)' : could not deduce template argument for 'std::_Vb_iterator<_Sizet,_Difft,_MycontTy>' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 9 error C2784: 'std::_Vector_const_iterator<_Ty,_Alloc> std::operator +(_Vector_const_iterator<_Ty,_Alloc>::difference_type,std::_Vector_const_iterator<_Ty,_Alloc>)' : could not deduce template argument for 'std::_Vector_const_iterator<_Ty,_Alloc>' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 8 error C2784: 'std::_Vector_iterator<_Ty,_Alloc> std::operator +(_Vector_iterator<_Ty,_Alloc>::difference_type,std::_Vector_iterator<_Ty,_Alloc>)' : could not deduce template argument for 'std::_Vector_iterator<_Ty,_Alloc>' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 13 error C2784: 'std::basic_string<_Elem,_Traits,_Alloc> std::operator +(const _Elem *,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'const _Elem *' from 'std::basic_string<_Elem,_Traits,_Ax>' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 12 error C2784: 'std::basic_string<_Elem,_Traits,_Alloc> std::operator +(const _Elem,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'const std::basic_string<_Elem,_Traits,_Alloc> &' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 14 error C2784: 'std::basic_string<_Elem,_Traits,_Alloc> std::operator +(const std::basic_string<_Elem,_Traits,_Alloc> &,const std::basic_string<_Elem,_Traits,_Alloc> &)' : could not deduce template argument for 'const std::basic_string<_Elem,_Traits,_Alloc> &' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
Error 17 error C2784: 'std::reverse_iterator<_RanIt> std::operator +(_Diff,const std::reverse_iterator<_RanIt> &)' : could not deduce template argument for 'const std::reverse_iterator<_RanIt> &' from 'WCHAR [260]' ...\testlog4cppdll\log4cpp\src\dailyrollingfileappender.cpp 127
以下是代码：
hFind = FindFirstFile(LPTSTR(pattern.c_str()), &ffd); //Ahrost
if (hFind != INVALID_HANDLE_VALUE) {
do {
struct stat statBuf;
const std::string fullfilename = dirname + PATHDELIMITER + ffd.cFileName;
int res = ::stat(fullfilename.c_str(), &statBuf);
if (res != -1 && statBuf.st_mtime < oldest && !(ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
std::cout << "Deleting " << fullfilename << "\n";
::unlink(fullfilename.c_str());
}
} while (FindNextFile(hFind, &ffd) != 0);
if (GetLastError() != ERROR_NO_MORE_FILES) {
// [XXX] some kind of error happened
}
FindClose(hFind);
hFind = INVALID_HANDLE_VALUE;
}
整个文件来源是：
#include "PortabilityImpl.hh"
#ifdef LOG4CPP_HAVE_IO_H
# include <io.h>
#endif
#ifdef LOG4CPP_HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <log4cpp/DailyRollingFileAppender.hh>
#include <log4cpp/Category.hh>
#include <log4cpp/FactoryParams.hh>
#include <memory>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <iostream>
#include <time.h> //Ahrost
#ifdef LOG4CPP_HAVE_SSTREAM
#include <sstream>
#include <iomanip>
#endif
#ifndef WIN32 // only available on Win32
#include <dirent.h>
#endif
namespace log4cpp {
unsigned int DailyRollingFileAppender::maxDaysToKeepDefault = 30;
DailyRollingFileAppender::DailyRollingFileAppender(const std::string& name,
const std::string& fileName,
unsigned int maxDaysToKeep,
bool append,
mode_t mode) :
FileAppender(name, fileName, append, mode),
_maxDaysToKeep(maxDaysToKeep != 0 ? maxDaysToKeep : maxDaysToKeepDefault) {
struct stat statBuf;
int res;
time_t t;
// obtain last modification time
res = ::stat(fileName.c_str(), &statBuf);
if (res < 0) {
t = time(NULL);
} else {
t = statBuf.st_mtime;
}
#ifndef WIN32 // only available on Win32
localtime_r(&t, &_logsTime);
#else
localtime_s(&_logsTime, &t);
#endif
}
void DailyRollingFileAppender::setMaxDaysToKeep(unsigned int maxDaysToKeep) {
_maxDaysToKeep = maxDaysToKeep;
}
unsigned int DailyRollingFileAppender::getMaxDaysToKeep() const {
return _maxDaysToKeep;
}
void DailyRollingFileAppender::rollOver()
{
std::ostringstream filename_s;
::close(_fd);
filename_s << _fileName << "." << _logsTime.tm_year + 1900 << "-"
<< std::setfill('0') << std::setw(2) << _logsTime.tm_mon + 1 << "-"
<< std::setw(2) << _logsTime.tm_mday << std::ends;
const std::string lastFn = filename_s.str();
::rename(_fileName.c_str(), lastFn.c_str());
_fd = ::open(_fileName.c_str(), _flags, _mode);
const time_t oldest = time(NULL) - _maxDaysToKeep * 60 * 60 * 24;
#ifndef WIN32
#define PATHDELIMITER "/"
#else
#define PATHDELIMITER "\\"
#endif
// iterate over files around log file and delete older with same prefix
const std::string::size_type last_delimiter = _fileName.rfind(PATHDELIMITER);
const std::string dirname((last_delimiter == std::string::npos)? "." : _fileName.substr(0, last_delimiter));
const std::string filname((last_delimiter == std::string::npos)? _fileName : _fileName.substr(last_delimiter+1, _fileName.size()-last_delimiter-1));
#ifndef WIN32 // only available on Win32
struct dirent **entries;
int nentries = scandir(dirname.c_str(), &entries, 0, alphasort);
if (nentries < 0)
return;
for (int i = 0; i < nentries; i++) {
struct stat statBuf;
int res = ::stat(entries[i]->d_name, &statBuf);
if ((res == -1) || (!S_ISREG(statBuf.st_mode))) {
free(entries[i]);
continue;
}
if (statBuf.st_mtime < oldest && strstr(entries[i]->d_name, filname.c_str())) {
const std::string fullfilename = dirname + PATHDELIMITER + entries[i]->d_name;
::unlink(fullfilename.c_str());
std::cout << " Deleting " << fullfilename.c_str() << std::endl;
}
free(entries[i]);
}
free(entries);
#else
HANDLE hFind = INVALID_HANDLE_VALUE;
WIN32_FIND_DATA ffd;
const std::string pattern = _fileName + "*";
hFind = FindFirstFile(LPTSTR(pattern.c_str()), &ffd); //Ahrost
if (hFind != INVALID_HANDLE_VALUE) {
do {
struct stat statBuf;
const std::string fullfilename = dirname + PATHDELIMITER + ffd.cFileName;
int res = ::stat(fullfilename.c_str(), &statBuf);
if (res != -1 && statBuf.st_mtime < oldest && !(ffd.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)) {
std::cout << "Deleting " << fullfilename << "\n";
::unlink(fullfilename.c_str());
}
} while (FindNextFile(hFind, &ffd) != 0);
if (GetLastError() != ERROR_NO_MORE_FILES) {
// [XXX] some kind of error happened
}
FindClose(hFind);
hFind = INVALID_HANDLE_VALUE;
}
#endif
}
void DailyRollingFileAppender::_append(const log4cpp::LoggingEvent &event)
{
struct tm now;
time_t t = time(NULL);
#ifndef WIN32 // only available on Win32
bool timeok = localtime_r(&t, &now) != NULL;
#else
bool timeok = localtime_s(&now, &t) == 0;
#endif
if (timeok) {
if ((now.tm_mday != _logsTime.tm_mday) ||
(now.tm_mon != _logsTime.tm_mon) ||
(now.tm_year != _logsTime.tm_year)) {
rollOver();
_logsTime = now;
}
}
log4cpp::FileAppender::_append(event);
}
std::auto_ptr<Appender> create_daily_roll_file_appender(const FactoryParams& params)
{
std::string name, filename;
bool append = true;
mode_t mode = 664;
unsigned int max_days_keep = 0;
params.get_for("daily roll file appender").required("name", name)("filename", filename)("max_days_keep", max_days_keep)
.optional("append", append)("mode", mode);
return std::auto_ptr<Appender>(new DailyRollingFileAppender(name, filename, max_days_keep, append, mode));
}
}
上面的源代码属于DailyRollingFileAppender.cpp文件，它是log4cpp文件之一。
答案 0 :(得分：0)
你的问题是窄弦和宽弦的混淆。
使用名称中带字母T的字符类型（如LPTSTR）意味着代码可以使用窄字符或宽字符，具体取决于_UNICODE设置。但是，你也使用std :: string类型，它们显然是狭义的，并且使用没有宽字符说明符L的文字。
如果您的代码应该同时适用于窄版和宽版，请确保使用TEXT（）或_T（）宏来形成相应的字符串。