Added thirdparty: boost library

thirdparty/include/boost/regex/v5/regex_raw_buffer.hpp

@@ -0,0 +1,213 @@
+/*
+ *
+ * Copyright (c) 1998-2002
+ * John Maddock
+ *
+ * Use, modification and distribution are subject to 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)
+ *
+ */
+
+ /*
+  *   LOCATION:    see http://www.boost.org for most recent version.
+  *   FILE         regex_raw_buffer.hpp
+  *   VERSION      see <boost/version.hpp>
+  *   DESCRIPTION: Raw character buffer for regex code.
+  *                Note this is an internal header file included
+  *                by regex.hpp, do not include on its own.
+  */
+
+#ifndef BOOST_REGEX_RAW_BUFFER_HPP
+#define BOOST_REGEX_RAW_BUFFER_HPP
+
+#ifndef BOOST_REGEX_CONFIG_HPP
+#include <boost/regex/config.hpp>
+#endif
+
+#include <algorithm>
+#include <cstddef>
+
+namespace boost{
+   namespace BOOST_REGEX_DETAIL_NS{
+
+struct empty_padding{};
+
+union padding
+{
+   void* p;
+   unsigned int i;
+};
+
+template <int N>
+struct padding3
+{
+   enum{
+      padding_size = 8,
+      padding_mask = 7
+   };
+};
+
+template<>
+struct padding3<2>
+{
+   enum{
+      padding_size = 2,
+      padding_mask = 1
+   };
+};
+
+template<>
+struct padding3<4>
+{
+   enum{
+      padding_size = 4,
+      padding_mask = 3
+   };
+};
+
+template<>
+struct padding3<8>
+{
+   enum{
+      padding_size = 8,
+      padding_mask = 7
+   };
+};
+
+template<>
+struct padding3<16>
+{
+   enum{
+      padding_size = 16,
+      padding_mask = 15
+   };
+};
+
+enum{
+   padding_size = padding3<sizeof(padding)>::padding_size,
+   padding_mask = padding3<sizeof(padding)>::padding_mask
+};
+
+//
+// class raw_storage
+// basically this is a simplified vector<unsigned char>
+// this is used by basic_regex for expression storage
+//
+
+class raw_storage
+{
+public:
+   typedef std::size_t           size_type;
+   typedef unsigned char*        pointer;
+private:
+   pointer last, start, end;
+public:
+
+   raw_storage();
+   raw_storage(size_type n);
+
+   ~raw_storage()
+   {
+      ::operator delete(start);
+   }
+
+   void  resize(size_type n)
+   {
+      size_type newsize = start ? last - start : 1024;
+      while (newsize < n)
+         newsize *= 2;
+      size_type datasize = end - start;
+      // extend newsize to WORD/DWORD boundary:
+      newsize = (newsize + padding_mask) & ~(padding_mask);
+
+      // allocate and copy data:
+      pointer ptr = static_cast<pointer>(::operator new(newsize));
+      BOOST_REGEX_NOEH_ASSERT(ptr)
+         if (start)
+            std::memcpy(ptr, start, datasize);
+
+      // get rid of old buffer:
+      ::operator delete(start);
+
+      // and set up pointers:
+      start = ptr;
+      end = ptr + datasize;
+      last = ptr + newsize;
+   }
+
+   void*  extend(size_type n)
+   {
+      if(size_type(last - end) < n)
+         resize(n + (end - start));
+      pointer result = end;
+      end += n;
+      return result;
+   }
+
+   void*  insert(size_type pos, size_type n)
+   {
+      BOOST_REGEX_ASSERT(pos <= size_type(end - start));
+      if (size_type(last - end) < n)
+         resize(n + (end - start));
+      void* result = start + pos;
+      std::memmove(start + pos + n, start + pos, (end - start) - pos);
+      end += n;
+      return result;
+   }
+
+   size_type  size()
+   {
+      return size_type(end - start);
+   }
+
+   size_type  capacity()
+   {
+      return size_type(last - start);
+   }
+
+   void*  data()const
+   {
+      return start;
+   }
+
+   size_type  index(void* ptr)
+   {
+      return size_type(static_cast<pointer>(ptr) - static_cast<pointer>(data()));
+   }
+
+   void  clear()
+   {
+      end = start;
+   }
+
+   void  align()
+   {
+      // move end up to a boundary:
+      end = start + (((end - start) + padding_mask) & ~padding_mask);
+   }
+   void swap(raw_storage& that)
+   {
+      std::swap(start, that.start);
+      std::swap(end, that.end);
+      std::swap(last, that.last);
+  }
+};
+
+inline raw_storage::raw_storage()
+{
+   last = start = end = 0;
+}
+
+inline raw_storage::raw_storage(size_type n)
+{
+   start = end = static_cast<pointer>(::operator new(n));
+   BOOST_REGEX_NOEH_ASSERT(start)
+   last = start + n;
+}
+
+} // namespace BOOST_REGEX_DETAIL_NS
+} // namespace boost
+
+#endif
+