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src/subversion/subversion/bindings/cxxhl/src/exception.cpp  view on Meta::CPAN

/**
 * @copyright
 * ====================================================================
 *    Licensed to the Apache Software Foundation (ASF) under one
 *    or more contributor license agreements.  See the NOTICE file
 *    distributed with this work for additional information
 *    regarding copyright ownership.  The ASF licenses this file
 *    to you under the Apache License, Version 2.0 (the
 *    "License"); you may not use this file except in compliance
 *    with the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 *    Unless required by applicable law or agreed to in writing,
 *    software distributed under the License is distributed on an
 *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 *    KIND, either express or implied.  See the License for the
 *    specific language governing permissions and limitations
 *    under the License.
 * ====================================================================
 * @endcopyright
 */

#include <algorithm>
#include <cstddef>
#include <cstring>
#include <new>
#include <sstream>

#include "svncxxhl/exception.hpp"

#include "svn_error.h"
#include "svn_utf.h"
#include "private/svn_atomic.h"
#include "private/svn_error_private.h"
#include "svn_private_config.h"
#undef TRUE
#undef FALSE

namespace subversion {
namespace cxxhl {

namespace detail {

class error_description
{
public:
  static error_description* create(const char* message,
                                   const char *loc_file, long loc_line,
                                   bool trace_link)
    {
      bool empty_message = (message == NULL);
      const std::size_t length = (empty_message ? 0 : std::strlen(message));
      void *memblock = ::operator new(length + sizeof(error_description));

      error_description* description = new(memblock) error_description(
          loc_file, loc_line, trace_link, empty_message);
      if (length)
        std::memcpy(description->m_message, message, length);
      description->m_message[length] = 0;
      return description;
    }

  static error_description* create(const char* message)
    {
      return create(message, NULL, 0, false);
    }

  error_description* reference() throw()
    {
      if (this)
        svn_atomic_inc(&m_refcount);
      return this;
    }

  error_description* dereference() throw()
    {
      if (this && 0 == svn_atomic_dec(&m_refcount))
        {
          this->~error_description();
          ::operator delete(this, std::nothrow);
          return NULL;
        }
      return this;
    }

  const char* what() const throw() { return (m_empty ? NULL : m_message); }
  const char* file() const throw() { return m_loc_file; }
  long line() const throw() { return m_loc_line; }
  bool trace() const throw() { return m_trace; }

private:
  error_description(const char *loc_file, long loc_line,
                    bool trace_link, bool empty_message) throw()
    : m_loc_file(loc_file),
      m_loc_line(loc_line),
      m_trace(trace_link),
      m_empty(empty_message),
      m_refcount(0)
    {}

  ~error_description() throw() {}

  const char* m_loc_file;
  long m_loc_line;
  bool m_trace;
  bool m_empty;