C 常用代码片段整理
一丶文件 文件夹相关
1.1 递归删除文件
代码语言：javascript
复制wstring Utilstring2wstring(string str)
{
wstring result;
//获取缓冲区大小，并申请空间，缓冲区大小按字符计算
int len = MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), NULL, 0);
wchar_t* buffer = NULL;
buffer = new wchar_t[len 1];
//多字节编码转换成宽字节编码
MultiByteToWideChar(CP_ACP, 0, str.c_str(), str.size(), buffer, len);
buffer[len] = L' '; //添加字符串结尾
//删除缓冲区并返回值
result.append(buffer);
if (buffer != NULL)
{
delete[] buffer;
buffer = NULL;
}
return result;
}
//将wstring转换成string
string Utilwstring2string(wstring wstr)
{
string result;
//获取缓冲区大小，并申请空间，缓冲区大小事按字节计算的
int len = WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), NULL, 0, NULL, NULL);
char* buffer = new char[len 1];
//宽字节编码转换成多字节编码
WideCharToMultiByte(CP_ACP, 0, wstr.c_str(), wstr.size(), buffer, len, NULL, NULL);
buffer[len] = ' ';
//删除缓冲区并返回值
result.append(buffer);
delete[] buffer;
return result;
}
bool DeleteAllFileA(std::string FileName)
{
string RootFileName = FileName;
wstring wRootFileName = Utilstring2wstring(RootFileName);
RootFileName = endsWith(wRootFileName, L"\") ? RootFileName : RootFileName "\";
string RmFilter = RootFileName "*.*";
WIN32_FIND_DATAA windata = { 0 };
HANDLE hFileHandle = FindFirstFileA(RmFilter.c_str(), &windata);
do
{
if (windata.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
{
string compareDirName = windata.cFileName;
if (compareDirName.find(".") != compareDirName.npos
|| compareDirName.find("..") != compareDirName.npos)
{
continue;
}
//递归删除
string RmFileName = RootFileName compareDirName;
DeleteAllFileA(RmFileName);
RemoveDirectoryA(RmFileName.c_str()); //递归删除文件夹
continue;
}
//直接删除文件
string RmFileName = RootFileName windata.cFileName;
DeleteFileA(RmFileName.c_str());
} while (FindNextFileA(hFileHandle, &windata));
return true;
}
