/****************************************************************************
**
** Copyright (C) 1992-2009 Nokia. All rights reserved.
** Copyright 2005 Roberto Raggi <roberto@kdevelop.org>
**
** This file is part of Qt Jambi.
**
** Commercial Usage
Licensees holding valid Qt Commercial licenses may use this file in
accordance with the Qt Commercial License Agreement provided with the
Software or, alternatively, in accordance with the terms contained in
a written agreement between you and Nokia.

GNU Lesser General Public License Usage
Alternatively, this file may be used under the terms of the GNU Lesser
General Public License version 2.1 as published by the Free Software
Foundation and appearing in the file LICENSE.LGPL included in the
packaging of this file.  Please review the following information to
ensure the GNU Lesser General Public License version 2.1 requirements
will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

In addition, as a special exception, Nokia gives you certain
additional rights. These rights are described in the Nokia Qt LGPL
Exception version 1.0, included in the file LGPL_EXCEPTION.txt in this
package.

GNU General Public License Usage
Alternatively, this file may be used under the terms of the GNU
General Public License version 3.0 as published by the Free Software
Foundation and appearing in the file LICENSE.GPL included in the
packaging of this file.  Please review the following information to
ensure the GNU General Public License version 3.0 requirements will be
met: http://www.gnu.org/copyleft/gpl.html.

If you are unsure which license is appropriate for your use, please
contact the sales department at qt-sales@nokia.com.

**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
****************************************************************************/

#ifndef PP_ENGINE_H
#define PP_ENGINE_H

namespace rpp {

struct Value
{
  enum Kind {
    Kind_Long,
    Kind_ULong,
  };

  Kind kind;

  union {
    long l;
    unsigned long ul;
  };

  inline bool is_ulong () const { return kind == Kind_ULong; }

  inline void set_ulong (unsigned long v)
  {
    ul = v;
    kind = Kind_ULong;
  }

  inline void set_long (long v)
  {
    l = v;
    kind = Kind_Long;
  }

  inline bool is_zero () const { return l == 0; }

#define PP_DEFINE_BIN_OP(name, op) \
  inline Value &name (const Value &other) \
  { \
    if (is_ulong () || other.is_ulong ()) \
      set_ulong (ul op other.ul); \
    else \
      set_long (l op other.l); \
    return *this; \
  }

  PP_DEFINE_BIN_OP(op_add, +)
  PP_DEFINE_BIN_OP(op_sub, -)
  PP_DEFINE_BIN_OP(op_mult, *)
  PP_DEFINE_BIN_OP(op_div, /)
  PP_DEFINE_BIN_OP(op_mod, %)
  PP_DEFINE_BIN_OP(op_lhs, <<)
  PP_DEFINE_BIN_OP(op_rhs, >>)
  PP_DEFINE_BIN_OP(op_lt, <)
  PP_DEFINE_BIN_OP(op_gt, >)
  PP_DEFINE_BIN_OP(op_le, <=)
  PP_DEFINE_BIN_OP(op_ge, >=)
  PP_DEFINE_BIN_OP(op_eq, ==)
  PP_DEFINE_BIN_OP(op_ne, !=)
  PP_DEFINE_BIN_OP(op_bit_and, &)
  PP_DEFINE_BIN_OP(op_bit_or, |)
  PP_DEFINE_BIN_OP(op_bit_xor, ^)
  PP_DEFINE_BIN_OP(op_and, &&)
  PP_DEFINE_BIN_OP(op_or, ||)

#undef PP_DEFINE_BIN_OP
};

class pp
{
  pp_environment &env;
  pp_macro_expander expand;
  pp_skip_identifier skip_identifier;
  pp_skip_comment_or_divop skip_comment_or_divop;
  pp_skip_blanks skip_blanks;
  pp_skip_number skip_number;
  std::vector<std::string> include_paths;
  std::string _M_current_text;

  enum { MAX_LEVEL = 512 };
  int _M_skipping[MAX_LEVEL];
  int _M_true_test[MAX_LEVEL];
  int iflevel;

  union
  {
    long token_value;
    unsigned long token_uvalue;
    std::string *token_text;
  };

  enum INCLUDE_POLICY
  {
    INCLUDE_GLOBAL,
    INCLUDE_LOCAL
  };

  enum TOKEN_TYPE
  {
    TOKEN_NUMBER = 1000,
    TOKEN_UNUMBER,
    TOKEN_IDENTIFIER,
    TOKEN_DEFINED,
    TOKEN_LT_LT,
    TOKEN_LT_EQ,
    TOKEN_GT_GT,
    TOKEN_GT_EQ,
    TOKEN_EQ_EQ,
    TOKEN_NOT_EQ,
    TOKEN_OR_OR,
    TOKEN_AND_AND,
  };

  enum PP_DIRECTIVE_TYPE
  {
    PP_UNKNOWN_DIRECTIVE,
    PP_DEFINE,
    PP_INCLUDE,
    PP_INCLUDE_NEXT,
    PP_ELIF,
    PP_ELSE,
    PP_ENDIF,
    PP_IF,
    PP_IFDEF,
    PP_IFNDEF,
    PP_UNDEF,
    PP_PRAGMA,
    PP_ERROR,
    PP_WARNING
  };

public:
  pp (pp_environment &__env);

  inline std::back_insert_iterator<std::vector<std::string> > include_paths_inserter ();

  inline void push_include_path (std::string const &__path);

  inline std::vector<std::string>::iterator include_paths_begin ();
  inline std::vector<std::string>::iterator include_paths_end ();

  inline std::vector<std::string>::const_iterator include_paths_begin () const;
  inline std::vector<std::string>::const_iterator include_paths_end () const;

  template <typename _InputIterator>
  inline _InputIterator eval_expression (_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _OutputIterator>
  void file (std::string const &filename, _OutputIterator __result);

  template <typename _OutputIterator>
  void file (FILE *fp, _OutputIterator __result);

  template <typename _InputIterator, typename _OutputIterator>
  void operator () (_InputIterator __first, _InputIterator __last, _OutputIterator __result);

private:
  inline bool file_isdir (std::string const &__filename) const;
  inline bool file_exists (std::string const &__filename) const;
  FILE *find_include_file (std::string const &__filename, std::string *__filepath,
                           INCLUDE_POLICY __include_policy, bool __skip_current_path = false) const;

  inline int skipping() const;
  bool test_if_level();

  inline std::string fix_file_path (std::string const &filename) const;
  inline bool is_absolute (std::string const &filename) const;

  PP_DIRECTIVE_TYPE find_directive (char const *__directive, std::size_t __size) const;

  template <typename _InputIterator>
  bool find_header_protection (_InputIterator __first, _InputIterator __last, std::string *__prot);

  template <typename _InputIterator>
  _InputIterator skip (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator eval_primary(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_multiplicative(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_additive(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_shift(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_relational(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_equality(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_and(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_xor(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_or(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_logical_and(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_logical_or(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator>
  _InputIterator eval_constant_expression(_InputIterator __first, _InputIterator __last, Value *result);

  template <typename _InputIterator, typename _OutputIterator>
  _InputIterator handle_directive(char const *__directive, std::size_t __size,
          _InputIterator __first, _InputIterator __last, _OutputIterator __result);

  template <typename _InputIterator, typename _OutputIterator>
  _InputIterator handle_include(bool skip_current_path, _InputIterator __first, _InputIterator __last,
        _OutputIterator __result);

  template <typename _InputIterator>
  _InputIterator handle_define (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator handle_if (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator handle_else (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator handle_elif (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator handle_endif (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator handle_ifdef (bool check_undefined, _InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator handle_undef(_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  inline char peek_char (_InputIterator __first, _InputIterator __last);

  template <typename _InputIterator>
  _InputIterator next_token (_InputIterator __first, _InputIterator __last, int *kind);
};

} // namespace rpp

#endif // PP_ENGINE_H

// kate: space-indent on; indent-width 2; replace-tabs on;