[英]Boost FileSystems, need help understanding what I'm doing
I wrote a program using boost filesystems almost a year ago, and I am now trying to go back and use that for a reference, but I'm not sure exactly what is going on with the code, and if there might be a better way to do it. 我差不多一年前使用boost文件系统编写了一个程序,现在我想回去使用它作为参考,但我不确定代码究竟发生了什么,如果有更好的方法去做吧。
Here is what I had done to iterate through a directory. 这是我在迭代目录时所做的工作。
vector <directory_entry> entry;
copy(directory_iterator("path"), directory_iterator(), back_inserter(entry));
This gets me a vector with directory entries for all of the files and directories inside the directory at "path" 这给我一个带有目录条目的向量,用于“path”目录中的所有文件和目录
Then I would sort them into two vectors of paths, one for files, one for directories, using is_regular_file. 然后我将它们分为两个路径向量,一个用于文件,一个用于目录,使用is_regular_file。
I was working with openAL, and I would have to do this type of conversion to get things working. 我正在使用openAL,我必须进行这种类型的转换才能使事情正常进行。
path fp = file[0]; //file a vector of directory_entry
string fps = fp.string();
buffer[0] = AlutCreateBufferFromFile(fps.c_str());
And this worked, but I am thinking this all must not be very correct how I'm using it. 这有效,但我认为这一切都不能正确我如何使用它。 Anyways, I just wanted to see if anyone could give me a little advice.
无论如何,我只是想看看是否有人可以给我一些建议。
Your code looks correct. 您的代码看起来正确。
You can avoid a couple variable declarations like so: 你可以避免像这样的几个变量声明:
buffer[0] = AlutCreateBufferFromFile(file[0].string().c_str());
You can also avoid copying the directory entries into a vector
and iterate over the directory entries directly: 您还可以避免将目录条目复制到
vector
并直接遍历目录条目:
directory_iterator cur("path");
directory_iterator end;
while (cur != end)
{
path p = *cur;
... // use p
++cur;
}
In C++11, you can improve on the loop further with lambdas: 在C ++ 11中,您可以使用lambdas进一步改进循环:
for_each(directory_iterator("path"), directory_iterator(), [](const path& p)
{
// use p
});
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