/*! \file picodeparser.h
 * \ingroup Code
 * \~\brief
 * \~english C++ code parser
 * \~russian Разбор C++ кода
 */
/*
    PIP - Platform Independent Primitives
    C++ code parser
    Ivan Pelipenko peri4ko@yandex.ru

    This program is free software: you can redistribute it and/or modify
    it under the terms of the GNU Lesser General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef PICODEPARSER_H
#define PICODEPARSER_H

#include "pievaluator.h"
#include "pifile.h"

inline bool _isCChar(const PIChar & c) {
	return (c.isAlpha() || (c.toAscii() == '_'));
}
inline bool _isCChar(const PIString & c) {
	if (c.isEmpty()) return false;
	return _isCChar(c[0]);
}

class PIP_EXPORT PICodeParser {
public:
	PICodeParser();

	enum Visibility {
		Global,
		Public,
		Protected,
		Private
	};
	enum Attribute {
		NoAttributes = 0x0,
		Const        = 0x01,
		Static       = 0x02,
		Mutable      = 0x04,
		Volatile     = 0x08,
		Inline       = 0x10,
		Virtual      = 0x20,
		Extern       = 0x40
	};

	typedef PIFlags<Attribute> Attributes;
	typedef PIPair<PIString, PIString> Define;
	typedef PIPair<PIString, PIString> Typedef;
	typedef PIMap<PIString, PIString> MetaMap;

	struct PIP_EXPORT Macro {
		Macro(const PIString & n = PIString(), const PIString & v = PIString(), const PIStringList & a = PIStringList()) {
			name  = n;
			value = v;
			args  = a;
		}
		PIString expand(PIString args_, bool * ok = 0) const;
		PIString name;
		PIString value;
		PIStringList args;
	};

	struct PIP_EXPORT Member {
		Member() {
			visibility  = Global;
			size        = 0;
			bits        = -1;
			is_type_ptr = false;
			attributes  = NoAttributes;
		}
		bool isBitfield() const { return bits > 0; }
		MetaMap meta;
		PIString type;
		PIString name;
		PIStringList arguments_full;
		PIStringList arguments_type;
		PIStringList dims;
		Visibility visibility;
		Attributes attributes;
		bool is_type_ptr;
		int size;
		int bits;
	};

	struct PIP_EXPORT Entity {
		Entity() {
			visibility   = Global;
			is_anonymous = false;
			size         = 0;
			parent_scope = 0;
		}
		MetaMap meta;
		PIString type;
		PIString name;
		PIString file;
		Visibility visibility;
		int size;
		bool is_anonymous;
		Entity * parent_scope;
		PIVector<Entity *> parents;
		PIVector<Member> functions;
		PIVector<Member> members;
		PIVector<Typedef> typedefs;
	};

	struct PIP_EXPORT EnumeratorInfo {
		EnumeratorInfo(const PIString & n = PIString(), int v = 0, const MetaMap & m = MetaMap()) {
			name  = n;
			value = v;
			meta  = m;
		}
		MetaMap meta;
		PIString name;
		int value;
	};

	struct PIP_EXPORT Enum {
		Enum(const PIString & n = PIString()) { name = n; }
		MetaMap meta;
		PIString name;
		PIVector<EnumeratorInfo> members;
	};

	void parseFile(const PIString & file, bool follow_includes = true);
	void parseFiles(const PIStringList & files, bool follow_includes = true);
	void parseFileContent(PIString fc);

	void includeDirectory(const PIString & dir) { includes << dir; }
	void addDefine(const PIString & def_name, const PIString & def_value) { custom_defines << Define(def_name, def_value); }
	bool isEnum(const PIString & name);
	Entity * findEntityByName(const PIString & en);
	PIStringList parsedFiles() const { return PIStringList(proc_files.toVector()); }
	PIString mainFile() const { return main_file; }
	const PICodeParser::Entity * global() const { return &root_; }

	int macrosSubstitutionMaxIterations() const { return macros_iter; }
	void setMacrosSubstitutionMaxIterations(int value) { macros_iter = value; }

	PIVector<Define> defines, custom_defines;
	PIVector<Macro> macros;
	PIVector<Enum> enums;
	PIVector<Typedef> typedefs;
	PIVector<Entity *> entities;

private:
	void clear();
	bool parseFileInternal(const PIString & file, bool follow_includes);
	bool parseFileContent(PIString & fc, bool main);
	bool parseDirective(PIString d);
	Entity * parseClassDeclaration(const PIString & fc);
	Entity * parseClass(Entity * parent, PIString & fc, bool is_namespace);
	MetaMap parseMeta(PIString & fc);
	bool parseEnum(Entity * parent, const PIString & name, PIString fc, const MetaMap & meta);
	Typedef parseTypedef(PIString fc);
	bool parseMember(Entity * parent, PIString & fc);
	int extractMemberBits(PIString & fc);
	void restoreTmpTemp(Member * e);
	void restoreTmpMeta(Member * e);
	MetaMap maybeMeta(PIString & fc);
	bool macroCondition(const PIString & mif, PIString mifcond);
	bool isDefineExists(const PIString & dn);
	double defineValue(const PIString & dn);
	void replaceMeta(PIString & dn);
	PIString procMacros(PIString fc);
	double procMacrosCond(PIString fc);
	bool isDeclaration(const PIString & fc, int start, int * end);
	bool isMainFile(const PIString & fc);
	void normalizeEntityNamespace(PIString & n);

	int macros_iter, anon_num;
	bool with_includes;
	PIEvaluator evaluator;
	PISet<PIString> proc_files;
	PIString cur_file, main_file;
	PIStringList includes;
	Entity root_;
	Visibility cur_def_vis;
	PIString cur_namespace;
	PIMap<PIString, PIString> tmp_temp;
	PIMap<PIString, MetaMap> tmp_meta;
};

#endif // PICODEPARSER_H