Move char_buffer into a separate file

Signed-off-by: Damian Jarek <damian.jarek93@gmail.com>

CHANGELOG.md

@@ -7,6 +7,7 @@ Version 259:
 * Remove redundant instation of `static_string` in websocket
 * Remove redundant use of `asio::coroutine` in `flat_stream`
 * Remove unused includes from `test::stream`
+* Move `char_buffer` into a separate file
 
 --------------------------------------------------------------------------------
 

include/boost/beast/core/detail/char_buffer.hpp

@@ -0,0 +1,78 @@
+//
+// Copyright (c) 2019 Damian Jarek(damian.jarek93@gmail.com)
+//
+// 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)
+//
+// Official repository: https://github.com/boostorg/beast
+//
+
+#ifndef BOOST_BEAST_CORE_DETAIL_CHAR_BUFFER_HPP
+#define BOOST_BEAST_CORE_DETAIL_CHAR_BUFFER_HPP
+
+#include <boost/config.hpp>
+#include <cstddef>
+#include <cstring>
+#include <cstdint>
+
+namespace boost {
+namespace beast {
+namespace detail {
+
+template <std::size_t N>
+class char_buffer
+{
+public:
+    bool try_push_back(char c)
+    {
+        if (size_ == N)
+            return false;
+        buf_[size_++] = c;
+        return true;
+    }
+
+    bool try_append(char const* first, char const* last)
+    {
+        std::size_t const n = last - first;
+        if (n > N - size_)
+            return false;
+        std::memmove(&buf_[size_], first, n);
+        size_ += n;
+        return true;
+    }
+
+    void clear() noexcept
+    {
+        size_ = 0;
+    }
+
+    char* data() noexcept
+    {
+        return buf_;
+    }
+
+    char const* data() const noexcept
+    {
+        return buf_;
+    }
+
+    std::size_t size() const noexcept
+    {
+        return size_;
+    }
+
+    bool empty() const noexcept
+    {
+        return size_ == 0;
+    }
+
+private:
+    std::size_t size_= 0;
+    char buf_[N];
+};
+
+} // detail
+} // beast
+} // boost
+
+#endif

include/boost/beast/http/detail/basic_parser.hpp

@@ -11,6 +11,7 @@
 #define BOOST_BEAST_HTTP_DETAIL_BASIC_PARSER_HPP
 
 #include <boost/beast/core/string.hpp>
+#include <boost/beast/core/detail/char_buffer.hpp>
 #include <boost/beast/http/error.hpp>
 #include <boost/beast/http/detail/rfc7230.hpp>
 #include <boost/config.hpp>
@@ -23,59 +24,6 @@ namespace beast {
 namespace http {
 namespace detail {
 
-template <std::size_t N>
-class char_buffer
-{
-public:
-    bool try_push_back(char c)
-    {
-        if (size_ == N)
-            return false;
-        buf_[size_++] = c;
-        return true;
-    }
-
-    bool try_append(char const* first, char const* last)
-    {
-        std::size_t const n = last - first;
-        if (n > N - size_)
-            return false;
-        std::memmove(&buf_[size_], first, n);
-        size_ += n;
-        return true;
-    }
-
-    void clear() noexcept
-    {
-        size_ = 0;
-    }
-
-    char* data() noexcept
-    {
-        return buf_;
-    }
-
-    char const* data() const noexcept
-    {
-        return buf_;
-    }
-
-    std::size_t size() const noexcept
-    {
-        return size_;
-    }
-
-    bool empty() const noexcept
-    {
-        return size_ == 0;
-    }
-
-private:
-    std::size_t size_= 0;
-    char buf_[N];
-};
-
-
 struct basic_parser_base
 {
     // limit on the size of the obs-fold buffer
@@ -234,7 +182,7 @@ struct basic_parser_base
         char const* last,
         string_view& name,
         string_view& value,
-        char_buffer<max_obs_fold>& buf,
+        beast::detail::char_buffer<max_obs_fold>& buf,
         error_code& ec);
 
     BOOST_BEAST_DECL

include/boost/beast/http/detail/basic_parser.ipp

@@ -495,7 +495,7 @@ parse_field(
     char const* last,
     string_view& name,
     string_view& value,
-    char_buffer<max_obs_fold>& buf,
+    beast::detail::char_buffer<max_obs_fold>& buf,
     error_code& ec)
 {
 /*  header-field    = field-name ":" OWS field-value OWS

include/boost/beast/http/impl/basic_parser.ipp

@@ -404,7 +404,7 @@ parse_fields(char const*& in,
     string_view name;
     string_view value;
     // https://stackoverflow.com/questions/686217/maximum-on-http-header-values
-    detail::char_buffer<max_obs_fold> buf;
+    beast::detail::char_buffer<max_obs_fold> buf;
     auto p = in;
     for(;;)
     {