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include/boost/process/v2/detail/environment_win.hpp
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include/boost/process/v2/detail/environment_win.hpp
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//
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// process/environment/detail/environment_win.hpp
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// ~~~~~~~~~~~~~~~~~~~~~~~~
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//
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// Copyright (c) 2021 Klemens D. Morgenstern (klemens dot morgenstern at gmx dot net)
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//
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// Distributed under the Boost Software License, Version 1.0. (See accompanying
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// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
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//
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#ifndef BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_WIN_HPP
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#define BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_WIN_HPP
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#include <boost/process/v2/detail/config.hpp>
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#include <boost/process/v2/cstring_ref.hpp>
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#include <cwctype>
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BOOST_PROCESS_V2_BEGIN_NAMESPACE
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namespace environment
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{
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using char_type = wchar_t;
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template<typename Char>
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struct key_char_traits
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{
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typedef Char char_type;
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typedef typename std::char_traits<char_type>::int_type int_type;
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typedef typename std::char_traits<char_type>::off_type off_type;
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typedef typename std::char_traits<char_type>::pos_type pos_type;
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typedef typename std::char_traits<char_type>::state_type state_type;
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BOOST_CONSTEXPR static char to_lower(char c) {return std::tolower(to_int_type(c));}
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BOOST_CONSTEXPR static wchar_t to_lower(wchar_t c) {return std::towlower(to_int_type(c));}
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BOOST_CONSTEXPR static int_type to_lower(int_type i, char ) {return std::tolower(i);}
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BOOST_CONSTEXPR static int_type to_lower(int_type i, wchar_t) {return std::towlower(i);}
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BOOST_CONSTEXPR static
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void assign(char_type& c1, const char_type& c2) BOOST_NOEXCEPT
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{
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c1 = c2;
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}
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BOOST_CONSTEXPR static
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bool eq(char_type c1, char_type c2) BOOST_NOEXCEPT
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{
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return to_lower(c1) == to_lower(c2);
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}
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BOOST_CONSTEXPR static
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bool lt(char_type c1, char_type c2) BOOST_NOEXCEPT
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{
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return to_lower(c1) < to_lower(c2);
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}
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BOOST_CXX14_CONSTEXPR static
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int compare(const char_type* s1, const char_type* s2, size_t n) BOOST_NOEXCEPT
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{
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auto itrs = std::mismatch(s1, s1 + n, s2, &eq);
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if (itrs.first == (s1 + n))
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return 0;
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auto c1 = to_lower(*itrs.first);
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auto c2 = to_lower(*itrs.second);
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return (c1 < c2 ) ? -1 : 1;
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}
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static size_t length(const char* s) BOOST_NOEXCEPT { return std::strlen(s); }
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static size_t length(const wchar_t* s) BOOST_NOEXCEPT { return std::wcslen(s); }
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BOOST_CXX14_CONSTEXPR static
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const char_type* find(const char_type* s, size_t n, const char_type& a) BOOST_NOEXCEPT
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{
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const char_type u = to_lower(a);
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return std::find_if(s, s + n, [u](char_type c){return to_lower(c) == u;});
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}
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BOOST_CXX14_CONSTEXPR static
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char_type* move(char_type* s1, const char_type* s2, size_t n) BOOST_NOEXCEPT
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{
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if (s1 < s2)
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return std::move(s2, s2 + n, s1);
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else
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return std::move_backward(s2, s2 + n, s1 + n);
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}
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BOOST_CONSTEXPR static
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char_type* copy(char_type* s1, const char_type* s2, size_t n) BOOST_NOEXCEPT
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{
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return std::copy(s2, s2 + n, s1);
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}
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BOOST_CXX14_CONSTEXPR static
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char_type* assign(char_type* s, size_t n, char_type a) BOOST_NOEXCEPT
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{
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std::fill(s, s + n, a);
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return s +n;
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}
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BOOST_CONSTEXPR static
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int_type not_eof(int_type c) BOOST_NOEXCEPT
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{
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return eq_int_type(c, eof()) ? ~eof() : c;
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}
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BOOST_CONSTEXPR static
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char_type to_char_type(int_type c) BOOST_NOEXCEPT
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{
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return char_type(c);
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}
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BOOST_CONSTEXPR static
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int_type to_int_type(char c) BOOST_NOEXCEPT
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{
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return int_type((unsigned char)c);
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}
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BOOST_CONSTEXPR static
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int_type to_int_type(wchar_t c) BOOST_NOEXCEPT
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{
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return int_type((wchar_t)c);
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}
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BOOST_CONSTEXPR static
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bool eq_int_type(int_type c1, int_type c2) BOOST_NOEXCEPT
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{
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return to_lower(c1, char_type()) == to_lower(c2, char_type());
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}
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BOOST_CONSTEXPR static inline int_type eof() BOOST_NOEXCEPT
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{
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return int_type(EOF);
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}
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};
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namespace detail
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{
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template<typename Char>
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std::size_t hash_step(std::size_t prev, Char c, key_char_traits<Char>)
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{
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return prev ^ (key_char_traits<Char>::to_lower(c) << 1);
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}
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}
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template<typename Char>
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using value_char_traits = std::char_traits<Char>;
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BOOST_CONSTEXPR static char_type equality_sign = L'=';
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BOOST_CONSTEXPR static char_type delimiter = L';';
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using native_handle_type = wchar_t*;
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using native_iterator = const wchar_t*;
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namespace detail
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{
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BOOST_PROCESS_V2_DECL
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std::basic_string<wchar_t, value_char_traits<wchar_t>> get(
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basic_cstring_ref<wchar_t, key_char_traits<wchar_t>> key,
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error_code & ec);
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BOOST_PROCESS_V2_DECL
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void set(basic_cstring_ref<wchar_t, key_char_traits<wchar_t>> key,
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basic_cstring_ref<wchar_t, value_char_traits<wchar_t>> value,
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error_code & ec);
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BOOST_PROCESS_V2_DECL
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void unset(basic_cstring_ref<wchar_t, key_char_traits<wchar_t>> key,
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error_code & ec);
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BOOST_PROCESS_V2_DECL
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std::basic_string<char, value_char_traits<char>> get(
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basic_cstring_ref<char, key_char_traits<char>> key,
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error_code & ec);
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BOOST_PROCESS_V2_DECL
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void set(basic_cstring_ref<char, key_char_traits<char>> key,
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basic_cstring_ref<char, value_char_traits<char>> value,
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error_code & ec);
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BOOST_PROCESS_V2_DECL
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void unset(basic_cstring_ref<char, key_char_traits<char>> key,
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error_code & ec);
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BOOST_PROCESS_V2_DECL native_handle_type load_native_handle();
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struct native_handle_deleter
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{
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native_handle_deleter() = default;
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native_handle_deleter(const native_handle_deleter& ) = default;
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BOOST_PROCESS_V2_DECL void operator()(native_handle_type nh) const;
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};
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inline const char_type * dereference(native_iterator iterator) {return iterator;}
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BOOST_PROCESS_V2_DECL native_iterator next(native_iterator nh);
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BOOST_PROCESS_V2_DECL native_iterator find_end(native_handle_type nh);
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BOOST_PROCESS_V2_DECL bool is_exec_type(const wchar_t * pth);
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inline bool is_executable(const filesystem::path & pth, error_code & ec)
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{
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return filesystem::is_regular_file(pth, ec) && is_exec_type(pth.c_str());
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}
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}
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}
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BOOST_PROCESS_V2_END_NAMESPACE
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#endif //BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_WIN_HPP
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