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pandemonium_engine/modules/gdscript/gdscript_tokenizer.h
Relintai 09138d762c Ported: Use hash table for GDScript parsing 
GDScript now uses hash table for lookup of type lists / functions / keywords, instead of linear String comparisons.
- lawnjelly
19f2006ec0
2023-03-18 09:44:01 +01:00

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#ifndef GDSCRIPT_TOKENIZER_H
#define GDSCRIPT_TOKENIZER_H
/*************************************************************************/
/* gdscript_tokenizer.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* 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. */
/*************************************************************************/
#include "core/containers/oa_hash_map.h"
#include "core/containers/pair.h"
#include "core/containers/vmap.h"
#include "core/string/string_name.h"
#include "core/string/ustring.h"
#include "core/variant/variant.h"
#include "gdscript_functions.h"
class GDScriptTokenizer {
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_WHILE,
TK_CF_BREAK,
TK_CF_CONTINUE,
TK_CF_PASS,
TK_CF_RETURN,
TK_CF_MATCH,
TK_PR_FUNCTION,
TK_PR_CLASS,
TK_PR_CLASS_NAME,
TK_PR_EXTENDS,
TK_PR_IS,
TK_PR_ONREADY,
TK_PR_TOOL,
TK_PR_STATIC,
TK_PR_EXPORT,
TK_PR_SETGET,
TK_PR_CONST,
TK_PR_VAR,
TK_PR_AS,
TK_PR_VOID,
TK_PR_ENUM,
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_DOLLAR,
TK_FORWARD_ARROW,
TK_NEWLINE,
TK_CONST_PI,
TK_CONST_TAU,
TK_WILDCARD,
TK_CONST_INF,
TK_CONST_NAN,
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];
enum {
TOKEN_HASH_TABLE_TYPE_START = 3,
TOKEN_HASH_TABLE_BUILTIN_START = TOKEN_HASH_TABLE_TYPE_START + Variant::VARIANT_MAX,
TOKEN_HASH_TABLE_KEYWORD_START = TOKEN_HASH_TABLE_BUILTIN_START + GDScriptFunctions::FUNC_MAX,
};
static OAHashMap<String, int> *token_hashtable;
public:
static const char *get_token_name(Token p_token);
static void initialize();
static void terminate();
bool is_token_literal(int p_offset = 0, bool variable_safe = false) const;
StringName get_token_literal(int p_offset = 0) const;
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 GDScriptFunctions::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 int get_token_line_tab_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;
#ifdef DEBUG_ENABLED
virtual const Vector<Pair<int, String>> &get_warning_skips() const = 0;
virtual const RBSet<String> &get_warning_global_skips() const = 0;
virtual bool is_ignoring_warnings() const = 0;
#endif // DEBUG_ENABLED
virtual ~GDScriptTokenizer() {}
};
class GDScriptTokenizerText : public GDScriptTokenizer {
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
GDScriptFunctions::Function func; //function for built in functions
int warning_code; //for warning skip
};
int line, col;
TokenData() {
type = TK_EMPTY;
line = col = 0;
vtype = Variant::NIL;
}
};
void _make_token(Token p_type);
void _make_newline(int p_indentation = 0, int p_tabs = 0);
void _make_identifier(const StringName &p_identifier);
void _make_built_in_func(GDScriptFunctions::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;
#ifdef DEBUG_ENABLED
Vector<Pair<int, String>> warning_skips;
RBSet<String> warning_global_skips;
bool ignore_warnings;
#endif // DEBUG_ENABLED
void _advance();
bool _parse_identifier(const String &p_str);
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 GDScriptFunctions::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 int get_token_line_tab_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);
#ifdef DEBUG_ENABLED
virtual const Vector<Pair<int, String>> &get_warning_skips() const { return warning_skips; }
virtual const RBSet<String> &get_warning_global_skips() const { return warning_global_skips; }
virtual bool is_ignoring_warnings() const { return ignore_warnings; }
#endif // DEBUG_ENABLED
};
class GDScriptTokenizerBuffer : public GDScriptTokenizer {
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 GDScriptFunctions::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 int get_token_line_tab_indent(int p_offset = 0) const { return 0; }
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);
#ifdef DEBUG_ENABLED
virtual const Vector<Pair<int, String>> &get_warning_skips() const {
static Vector<Pair<int, String>> v;
return v;
}
virtual const RBSet<String> &get_warning_global_skips() const {
static RBSet<String> s;
return s;
}
virtual bool is_ignoring_warnings() const { return true; }
#endif // DEBUG_ENABLED
GDScriptTokenizerBuffer();
};
#endif // GDSCRIPT_TOKENIZER_H
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