遍历对C ++的ini文件,可能是使用boost :: property_tree :: ptree中? [英] iterate over ini file on c++, probably using boost::property_tree::ptree?
问题描述
我的任务是微不足道的 - 我只是需要解析这样的文件:
My task is trivial - i just need to parse such file:
Apple = 1
Orange = 2
XYZ = 3950
但我不知道一组可用密钥。我是比较解析这个文件很容易使用C#,让我演示源$ C $ C:
But i do not know the set of available keys. I was parsing this file relatively easy using C#, let me demonstrate source code:
public static Dictionary<string, string> ReadParametersFromFile(string path)
{
string[] linesDirty = File.ReadAllLines(path);
string[] lines = linesDirty.Where(
str => !String.IsNullOrWhiteSpace(str) && !str.StartsWith("//")).ToArray();
var dict = lines.Select(s => s.Split(new char[] { '=' }))
.ToDictionary(s => s[0].Trim(), s => s[1].Trim());
return dict;
}
现在我只是需要用C ++做同样的事情。我想用的boost :: property_tree :: ptree中
不过似乎我只是不能超过ini文件迭代。这很容易读取ini文件:
Now I just need to do the same thing using c++. I was thinking to use boost::property_tree::ptree
however it seems I just can not iterate over ini file. It's easy to read ini file:
boost::property_tree::ptree pt;
boost::property_tree::ini_parser::read_ini(path, pt);
但它是不可能的遍历它,请参阅该问题<一href=\"http://stackoverflow.com/questions/11065938/boost-program-options-get-all-entries-in-section\">Boost方案选择 - 获得部分所有条目
现在的问题是 - 什么是写C#code的模拟上面C上的最简单的方法++
The question is - what is the easiest way to write analog of C# code above on C++ ?
推荐答案
要直接回答你的问题:当然的迭代一个属性树是可能的。事实上,它是微不足道的:
To answer your question directly: of course iterating a property tree is possible. In fact it's trivial:
#include <boost/property_tree/ptree.hpp>
#include <boost/property_tree/ini_parser.hpp>
int main()
{
using boost::property_tree::ptree;
ptree pt;
read_ini("input.txt", pt);
for (auto& section : pt)
{
std::cout << '[' << section.first << "]\n";
for (auto& key : section.second)
std::cout << key.first << "=" << key.second.get_value<std::string>() << "\n";
}
}
这导致像输出:
[Cat1]
name1=100 #skipped
name2=200 \#not \\skipped
name3=dhfj dhjgfd
[Cat_2]
UsagePage=9
Usage=19
Offset=0x1204
[Cat_3]
UsagePage=12
Usage=39
Offset=0x12304
我已经写了使用的升压精神前:
- Cross-platform的方式来获得,其中给定的选项被发现 INI文件的行号
- Cross-platform way to get line number of an INI file where given option was found
它支持意见(单线和块),报价逃脱等。
It supports comments (single line and block), quotes, escapes etc.
(作为奖金,它可选记录所有解析的元素,这是问题的主题的确切源位置)。
(as a bonus, it optionally records the exact source locations of all the parsed elements, which was the subject of that question).
有关你的目的,不过,我想我会电子书籍加速属性树。
For your purpose, though, I think I'd recomment Boost Property Tree.
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