整理

include/boost/process/v2/detail/environment_posix.hpp

@@ -0,0 +1,90 @@
+//
+// process/environment/detail/environment_posix.hpp
+// ~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2021 Klemens D. Morgenstern (klemens dot morgenstern at gmx dot net)
+//
+// Distributed under the Boost Software License, Version 1.0. (See accompanying
+// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+//
+
+#ifndef BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_POSIX_HPP
+#define BOOST_PROCESS_V2_DETAIL_ENVIRONMENT_POSIX_HPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/cstring_ref.hpp>
+
+#if defined(__APPLE__)
+# include <crt_externs.h>
+# if !defined(environ)
+#  define environ (*_NSGetEnviron())
+# endif
+#elif defined(__MACH__) || defined(__FreeBSD__) || defined(__DragonFly__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__sun)
+ extern "C" { extern char **environ; }
+#endif
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+
+namespace environment
+{
+
+using char_type = char;
+
+template<typename Char>
+using key_char_traits = std::char_traits<Char>;
+
+template<typename Char>
+using value_char_traits = std::char_traits<Char>;
+
+
+constexpr char_type equality_sign = '=';
+constexpr char_type delimiter = ':';
+
+namespace detail
+{
+
+BOOST_PROCESS_V2_DECL
+basic_cstring_ref<char_type, value_char_traits<char>>
+get(basic_cstring_ref<char_type, key_char_traits<char_type>> key, error_code & ec);
+
+BOOST_PROCESS_V2_DECL
+void set(basic_cstring_ref<char_type, key_char_traits<char_type>> key,
+         basic_cstring_ref<char_type, value_char_traits<char_type>> value,
+         error_code & ec);
+
+BOOST_PROCESS_V2_DECL
+void unset(basic_cstring_ref<char_type, key_char_traits<char_type>> key,
+           error_code & ec);
+}
+
+
+using native_handle_type   = const char * const *;
+using native_iterator = native_handle_type;
+
+namespace detail
+{
+
+BOOST_PROCESS_V2_DECL native_handle_type load_native_handle();
+struct native_handle_deleter
+{
+    void operator()(native_handle_type) const {}
+};
+
+BOOST_PROCESS_V2_DECL native_iterator next(native_handle_type nh);
+BOOST_PROCESS_V2_DECL native_iterator find_end(native_handle_type nh);
+inline const char_type * dereference(native_iterator iterator) {return *iterator;}
+
+BOOST_PROCESS_V2_DECL bool has_x_access(const char * pth);
+
+inline bool is_executable(const filesystem::path & pth, error_code & ec)
+{
+  return filesystem::is_regular_file(pth, ec) && has_x_access(pth.c_str());
+}
+
+}
+
+}
+
+BOOST_PROCESS_V2_END_NAMESPACE
+
+#endif