string.h

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// Copyright (c) 2019 The Bitcoin Core developers
// Distributed under the MIT software license, see the accompanying
// file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
#ifndef PIVX_UTIL_STRING_H
#define PIVX_UTIL_STRING_H
 
#include "attributes.h"
 
#include <algorithm>
#include <array>
#include <cstdint>
#include <cstring>
#include <functional>
#include <string>
#include <vector>
 
template <typename T, typename UnaryOp>
std::string Join(const std::vector<T>& list, const std::string& separator, UnaryOp unary_op)
{
    std::string ret;
    for (size_t i = 0; i < list.size(); ++i) {
        if (i > 0) ret += separator;
        ret += unary_op(list.at(i));
    }
    return ret;
}
 
inline std::string Join(const std::vector<std::string>& list, const std::string& separator)
{
    return Join(list, separator, [](const std::string& i) { return i; });
}
 
inline bool ValidAsCString(const std::string& str) noexcept
{
    return str.size() == strlen(str.c_str());
}
 
template <typename T1, size_t PREFIX_LEN>
NODISCARD inline bool HasPrefix(const T1& obj,
                                const std::array<uint8_t, PREFIX_LEN>& prefix)
{
    return obj.size() >= PREFIX_LEN &&
           std::equal(std::begin(prefix), std::end(prefix), std::begin(obj));
}
 
#endif // PIVX_UTIL_STRING_H