utils.h

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*                                                                           *
* Copyright (C) 2024 Intel Corporation                                      *
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#pragma once 

#include <iterator>
#include <algorithm>
#include <string.h>

namespace set_operations {
    // to = to \/ from      (in place set union)
    template <typename T1, typename T2>
    void combine(T1 &to, T2 &from) {
        copy(from.begin(), from.end(), inserter(to, to.end()));
    }
    // from = from \ what   (in place set difference)
    template <typename T1, typename T2>
    void exclude(T1 &from, T2 &what) {
        for (typename T2::iterator what_it = what.begin();
             what_it != what.end(); ++what_it) {
            do {
                typename T1::iterator it = find(from.begin(), from.end(), *what_it);
                if (it != from.end())
                    from.erase(it);
                else 
                    break;
            } while (true);
        }
    }
    // result = one \ two    (set difference)
    template <typename T1, typename T2, typename T3>
    void diff(T1 &one, T2 &two, T3 &result) {
        set_difference(one.begin(), one.end(), two.begin(), two.end(), inserter(result, result.end()));
    }
    static inline const std::string to_lower(const std::string &in) {
        std::string out = in;
        transform(in.begin(), in.end(), out.begin(), ::tolower);
        return out;
    }
    template <typename T>
    void preprocess_list(T &list) {
        T tmp;
        transform(list.begin(), list.end(), inserter(tmp, tmp.end()), to_lower);
        list = tmp;
    }
    struct case_insens_cmp : public std::binary_function<std::string, std::string, bool> {
        bool operator()(const std::string &lhs, const std::string &rhs) const {
#ifdef WIN_IMB
            return stricmp(lhs.c_str(), rhs.c_str()) < 0;
#else
            return ::strcasecmp(lhs.c_str(), rhs.c_str()) < 0 ;
#endif
        }
    };
}