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virtualx-engine/modules/gdscript/gd_tokenizer.h
Rémi Verschelde d8223ffa75 Welcome in 2017, dear changelog reader! 
That year should bring the long-awaited OpenGL ES 3.0 compatible renderer
with state-of-the-art rendering techniques tuned to work as low as middle
end handheld devices - without compromising with the possibilities given
for higher end desktop games of course. Great times ahead for the Godot
community and the gamers that will play our games!

(cherry picked from commit c7bc44d5ad)
2017-01-12 19:15:30 +01:00

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/*************************************************************************/
/* gd_tokenizer.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* http://www.godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2017 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_ONREADY,
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_PR_BREAKPOINT,
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_CONST_PI,
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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