update boost

linx64/include/boost/process/v2/windows/impl/default_launcher.ipp

@@ -0,0 +1,80 @@
+//
+// boost/process/v2/windows/impl/default_launcher.ipp
+// ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+//
+// Copyright (c) 2022 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_WINDOWS_IMPL_DEFAULT_LAUNCHER_IPP
+#define BOOST_PROCESS_V2_WINDOWS_IMPL_DEFAULT_LAUNCHER_IPP
+
+#include <boost/process/v2/detail/config.hpp>
+#include <boost/process/v2/windows/default_launcher.hpp>
+
+BOOST_PROCESS_V2_BEGIN_NAMESPACE
+namespace windows
+{
+
+  std::size_t default_launcher::escaped_argv_length(basic_string_view<wchar_t> ws)
+  {
+    if (ws.empty())
+      return 2u; // just quotes
+
+    constexpr static auto space = L' ';
+    constexpr static auto quote = L'"';
+
+    const auto has_space = ws.find(space) != basic_string_view<wchar_t>::npos;
+    const auto quoted = (ws.front() == quote) && (ws.back() == quote);
+    const auto needs_escape = has_space && !quoted ;
+
+    if (!needs_escape)
+      return ws.size();
+    else
+      return ws.size() + std::count(ws.begin(), ws.end(), quote) + 2u;
+  }
+
+
+  std::size_t default_launcher::escape_argv_string(wchar_t * itr, std::size_t max_size, 
+                                        basic_string_view<wchar_t> ws)
+  { 
+    const auto sz = escaped_argv_length(ws);
+    if (sz > max_size)
+      return 0u;
+    if (ws.empty())      
+    {
+      itr[0] = L'"';
+      itr[1] = L'"';
+      return 2u;
+    }
+
+    const auto has_space = ws.find(L' ') != basic_string_view<wchar_t>::npos;
+    const auto quoted = (ws.front() == L'"') && (ws.back() ==  L'"');
+    const auto needs_escape = has_space && !quoted;
+
+    if (!needs_escape)
+      return std::copy(ws.begin(), ws.end(), itr) - itr;
+
+    if (sz < (2u + ws.size()))
+      return 0u;
+      
+    const auto end = itr + sz; 
+    const auto begin = itr;
+    *(itr ++) = L'"';
+    for (auto wc : ws)
+    {
+      if (wc == L'"')
+        *(itr++) = L'\\';
+      *(itr++) = wc;
+    }
+
+    *(itr ++) = L'"';
+    return itr - begin;
+  }
+
+}
+BOOST_PROCESS_V2_END_NAMESPACE
+
+
+#endif //BOOST_PROCESS_V2_WINDOWS_IMPL_DEFAULT_LAUNCHER_IPP