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#ifndef VARIANT_PARSER_H
#define VARIANT_PARSER_H
#include "variant.h"
#include "os/file_access.h"
#include "resource.h"
class VariantParser {
public:
struct Stream {
virtual CharType get_char()=0;
virtual bool is_utf8() const=0;
virtual bool is_eof() const=0;
CharType saved;
Stream() { saved=0; }
virtual ~Stream() {}
};
struct StreamFile : public Stream {
FileAccess *f;
virtual CharType get_char();
virtual bool is_utf8() const;
virtual bool is_eof() const;
StreamFile() { f=NULL; }
};
struct StreamString : public Stream {
String s;
int pos;
virtual CharType get_char();
virtual bool is_utf8() const;
virtual bool is_eof() const;
StreamString() { pos=0; }
};
typedef Error (*ParseResourceFunc)(void* p_self, Stream* p_stream,Ref<Resource>& r_res,int &line,String &r_err_str);
struct ResourceParser {
void *userdata;
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_NUMBER,
TK_COLOR,
TK_COLON,
TK_COMMA,
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=NULL);
static Error _parse_array(Array &array, Stream *p_stream, int &line, String &r_err_str,ResourceParser *p_res_parser=NULL);
static Error _parse_tag(Token& token,Stream *p_stream, int &line, String &r_err_str,Tag& r_tag,ResourceParser *p_res_parser=NULL);
public:
static Error parse_tag(Stream *p_stream, int &line, String &r_err_str,Tag& r_tag,ResourceParser *p_res_parser=NULL);
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=NULL);
static Error parse_value(Token& token,Variant &value, Stream *p_stream, int &line, String &r_err_str,ResourceParser *p_res_parser=NULL);
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=NULL);
};
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=NULL,void* p_encode_res_ud=NULL);
};
#endif // VARIANT_PARSER_H
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