diff options
Diffstat (limited to 'core/variant/variant_parser.h')
| -rw-r--r-- | core/variant/variant_parser.h | 148 |
1 files changed, 148 insertions, 0 deletions
diff --git a/core/variant/variant_parser.h b/core/variant/variant_parser.h new file mode 100644 index 0000000000..59d18a8b9f --- /dev/null +++ b/core/variant/variant_parser.h @@ -0,0 +1,148 @@ +/*************************************************************************/ +/* variant_parser.h */ +/*************************************************************************/ +/* This file is part of: */ +/* GODOT ENGINE */ +/* https://godotengine.org */ +/*************************************************************************/ +/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */ +/* Copyright (c) 2014-2020 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. */ +/*************************************************************************/ + +#ifndef VARIANT_PARSER_H +#define VARIANT_PARSER_H + +#include "core/io/resource.h" +#include "core/os/file_access.h" +#include "core/variant/variant.h" + +class VariantParser { +public: + struct Stream { + virtual char32_t get_char() = 0; + virtual bool is_utf8() const = 0; + virtual bool is_eof() const = 0; + + char32_t saved = 0; + + Stream() {} + virtual ~Stream() {} + }; + + struct StreamFile : public Stream { + FileAccess *f = nullptr; + + virtual char32_t get_char(); + virtual bool is_utf8() const; + virtual bool is_eof() const; + + StreamFile() {} + }; + + struct StreamString : public Stream { + String s; + int pos = 0; + + virtual char32_t get_char(); + virtual bool is_utf8() const; + virtual bool is_eof() const; + + StreamString() {} + }; + + typedef Error (*ParseResourceFunc)(void *p_self, Stream *p_stream, Ref<Resource> &r_res, int &line, String &r_err_str); + + struct ResourceParser { + void *userdata = nullptr; + ParseResourceFunc func; + ParseResourceFunc ext_func; + ParseResourceFunc sub_func; + }; + + enum TokenType { + TK_CURLY_BRACKET_OPEN, + TK_CURLY_BRACKET_CLOSE, + TK_BRACKET_OPEN, + TK_BRACKET_CLOSE, + TK_PARENTHESIS_OPEN, + TK_PARENTHESIS_CLOSE, + TK_IDENTIFIER, + TK_STRING, + TK_STRING_NAME, + TK_NUMBER, + TK_COLOR, + TK_COLON, + TK_COMMA, + TK_PERIOD, + TK_EQUAL, + TK_EOF, + TK_ERROR, + TK_MAX + }; + + enum Expecting { + + EXPECT_OBJECT, + EXPECT_OBJECT_KEY, + EXPECT_COLON, + EXPECT_OBJECT_VALUE, + }; + + struct Token { + TokenType type; + Variant value; + }; + + struct Tag { + String name; + Map<String, Variant> fields; + }; + +private: + static const char *tk_name[TK_MAX]; + + template <class T> + static Error _parse_construct(Stream *p_stream, Vector<T> &r_construct, int &line, String &r_err_str); + static Error _parse_enginecfg(Stream *p_stream, Vector<String> &strings, int &line, String &r_err_str); + static Error _parse_dictionary(Dictionary &object, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser = nullptr); + static Error _parse_array(Array &array, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser = nullptr); + static Error _parse_tag(Token &token, Stream *p_stream, int &line, String &r_err_str, Tag &r_tag, ResourceParser *p_res_parser = nullptr, bool p_simple_tag = false); + +public: + static Error parse_tag(Stream *p_stream, int &line, String &r_err_str, Tag &r_tag, ResourceParser *p_res_parser = nullptr, bool p_simple_tag = false); + static Error parse_tag_assign_eof(Stream *p_stream, int &line, String &r_err_str, Tag &r_tag, String &r_assign, Variant &r_value, ResourceParser *p_res_parser = nullptr, bool p_simple_tag = false); + + static Error parse_value(Token &token, Variant &value, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser = nullptr); + static Error get_token(Stream *p_stream, Token &r_token, int &line, String &r_err_str); + static Error parse(Stream *p_stream, Variant &r_ret, String &r_err_str, int &r_err_line, ResourceParser *p_res_parser = nullptr); +}; + +class VariantWriter { +public: + typedef Error (*StoreStringFunc)(void *ud, const String &p_string); + typedef String (*EncodeResourceFunc)(void *ud, const RES &p_resource); + + static Error write(const Variant &p_variant, StoreStringFunc p_store_string_func, void *p_store_string_ud, EncodeResourceFunc p_encode_res_func, void *p_encode_res_ud); + static Error write_to_string(const Variant &p_variant, String &r_string, EncodeResourceFunc p_encode_res_func = nullptr, void *p_encode_res_ud = nullptr); +}; + +#endif // VARIANT_PARSER_H |