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godot/modules/gdscript/gd_tokenizer.h
Juan Linietsky 48f1d02da4 added ability to define signals in script 
closes #2175
2015-06-24 13:29:45 -03:00

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/*************************************************************************/
/* gd_tokenizer.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2015 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#ifndef GD_TOKENIZER_H
#define GD_TOKENIZER_H
#include "ustring.h"
#include "variant.h"
#include "string_db.h"
#include "gd_functions.h"
#include "vmap.h"
class GDTokenizer {
public:
enum Token {
TK_EMPTY,
TK_IDENTIFIER,
TK_CONSTANT,
TK_SELF,
TK_BUILT_IN_TYPE,
TK_BUILT_IN_FUNC,
TK_OP_IN,
TK_OP_EQUAL,
TK_OP_NOT_EQUAL,
TK_OP_LESS,
TK_OP_LESS_EQUAL,
TK_OP_GREATER,
TK_OP_GREATER_EQUAL,
TK_OP_AND,
TK_OP_OR,
TK_OP_NOT,
TK_OP_ADD,
TK_OP_SUB,
TK_OP_MUL,
TK_OP_DIV,
TK_OP_MOD,
TK_OP_SHIFT_LEFT,
TK_OP_SHIFT_RIGHT,
TK_OP_ASSIGN,
TK_OP_ASSIGN_ADD,
TK_OP_ASSIGN_SUB,
TK_OP_ASSIGN_MUL,
TK_OP_ASSIGN_DIV,
TK_OP_ASSIGN_MOD,
TK_OP_ASSIGN_SHIFT_LEFT,
TK_OP_ASSIGN_SHIFT_RIGHT,
TK_OP_ASSIGN_BIT_AND,
TK_OP_ASSIGN_BIT_OR,
TK_OP_ASSIGN_BIT_XOR,
TK_OP_BIT_AND,
TK_OP_BIT_OR,
TK_OP_BIT_XOR,
TK_OP_BIT_INVERT,
//TK_OP_PLUS_PLUS,
//TK_OP_MINUS_MINUS,
TK_CF_IF,
TK_CF_ELIF,
TK_CF_ELSE,
TK_CF_FOR,
TK_CF_DO,
TK_CF_WHILE,
TK_CF_SWITCH,
TK_CF_CASE,
TK_CF_BREAK,
TK_CF_CONTINUE,
TK_CF_PASS,
TK_CF_RETURN,
TK_PR_FUNCTION,
TK_PR_CLASS,
TK_PR_EXTENDS,
TK_PR_TOOL,
TK_PR_STATIC,
TK_PR_EXPORT,
TK_PR_SETGET,
TK_PR_CONST,
TK_PR_VAR,
TK_PR_PRELOAD,
TK_PR_ASSERT,
TK_PR_YIELD,
TK_PR_SIGNAL,
TK_BRACKET_OPEN,
TK_BRACKET_CLOSE,
TK_CURLY_BRACKET_OPEN,
TK_CURLY_BRACKET_CLOSE,
TK_PARENTHESIS_OPEN,
TK_PARENTHESIS_CLOSE,
TK_COMMA,
TK_SEMICOLON,
TK_PERIOD,
TK_QUESTION_MARK,
TK_COLON,
TK_NEWLINE,
TK_ERROR,
TK_EOF,
TK_CURSOR, //used for code completion
TK_MAX
};
protected:
enum StringMode {
STRING_SINGLE_QUOTE,
STRING_DOUBLE_QUOTE,
STRING_MULTILINE
};
static const char* token_names[TK_MAX];
public:
static const char *get_token_name(Token p_token);
virtual const Variant& get_token_constant(int p_offset=0) const=0;
virtual Token get_token(int p_offset=0) const=0;
virtual StringName get_token_identifier(int p_offset=0) const=0;
virtual GDFunctions::Function get_token_built_in_func(int p_offset=0) const=0;
virtual Variant::Type get_token_type(int p_offset=0) const=0;
virtual int get_token_line(int p_offset=0) const=0;
virtual int get_token_column(int p_offset=0) const=0;
virtual int get_token_line_indent(int p_offset=0) const=0;
virtual String get_token_error(int p_offset=0) const=0;
virtual void advance(int p_amount=1)=0;
virtual ~GDTokenizer(){};
};
class GDTokenizerText : public GDTokenizer {
enum {
MAX_LOOKAHEAD=4,
TK_RB_SIZE=MAX_LOOKAHEAD*2+1
};
struct TokenData {
Token type;
StringName identifier; //for identifier types
Variant constant; //for constant types
union {
Variant::Type vtype; //for type types
GDFunctions::Function func; //function for built in functions
};
int line,col;
TokenData() { type = TK_EMPTY; line=col=0; vtype=Variant::NIL; }
};
void _make_token(Token p_type);
void _make_newline(int p_spaces=0);
void _make_identifier(const StringName& p_identifier);
void _make_built_in_func(GDFunctions::Function p_func);
void _make_constant(const Variant& p_constant);
void _make_type(const Variant::Type& p_type);
void _make_error(const String& p_error);
String code;
int len;
int code_pos;
const CharType *_code;
int line;
int column;
TokenData tk_rb[TK_RB_SIZE*2+1];
int tk_rb_pos;
String last_error;
bool error_flag;
void _advance();
public:
void set_code(const String& p_code);
virtual Token get_token(int p_offset=0) const;
virtual StringName get_token_identifier(int p_offset=0) const;
virtual GDFunctions::Function get_token_built_in_func(int p_offset=0) const;
virtual Variant::Type get_token_type(int p_offset=0) const;
virtual int get_token_line(int p_offset=0) const;
virtual int get_token_column(int p_offset=0) const;
virtual int get_token_line_indent(int p_offset=0) const;
virtual const Variant& get_token_constant(int p_offset=0) const;
virtual String get_token_error(int p_offset=0) const;
virtual void advance(int p_amount=1);
};
class GDTokenizerBuffer : public GDTokenizer {
enum {
TOKEN_BYTE_MASK=0x80,
TOKEN_BITS=8,
TOKEN_MASK=(1<<TOKEN_BITS)-1,
TOKEN_LINE_BITS=24,
TOKEN_LINE_MASK=(1<<TOKEN_LINE_BITS)-1,
};
Vector<StringName> identifiers;
Vector<Variant> constants;
VMap<uint32_t,uint32_t> lines;
Vector<uint32_t> tokens;
Variant nil;
int token;
public:
Error set_code_buffer(const Vector<uint8_t> & p_buffer);
static Vector<uint8_t> parse_code_string(const String& p_code);
virtual Token get_token(int p_offset=0) const;
virtual StringName get_token_identifier(int p_offset=0) const;
virtual GDFunctions::Function get_token_built_in_func(int p_offset=0) const;
virtual Variant::Type get_token_type(int p_offset=0) const;
virtual int get_token_line(int p_offset=0) const;
virtual int get_token_column(int p_offset=0) const;
virtual int get_token_line_indent(int p_offset=0) const;
virtual const Variant& get_token_constant(int p_offset=0) const;
virtual String get_token_error(int p_offset=0) const;
virtual void advance(int p_amount=1);
GDTokenizerBuffer();
};
#endif // TOKENIZER_H
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