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DuelScriptScanner.h
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320 lines (262 loc) · 10.4 KB
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#ifndef DUELSCRIPT_SCANNER_H
#define DUELSCRIPT_SCANNER_H
#include <iostream>
#include <string>
#include <vector>
#include <map>
#include <cctype>
enum class TokenType {
LEFT_PAREN, RIGHT_PAREN, LEFT_BRACE, RIGHT_BRACE,
COMMA, DOT, MINUS, PLUS, SEMICOLON, SLASH, STAR,
BANG, BANG_EQUAL,
EQUAL, EQUAL_EQUAL,
GREATER, GREATER_EQUAL,
LESS, LESS_EQUAL,
SUMMON_OP,
DRAW_OP,
IDENTIFIER, STRING, NUMBER,
KEYWORD_YUGI, KEYWORD_LORDOFD, KEYWORD_TOONWORLD, KEYWORD_RITUAL,
KEYWORD_SETFIELD, KEYWORD_KAIBA, KEYWORD_JOEY, KEYWORD_SUMMON,
KEYWORD_DRAW, KEYWORD_JUDGMENTOFANUBIS, KEYWORD_SOLEMNJUDGMENT,
KEYWORD_FAIRYBOX, KEYWORD_SWORDSOFREVEALINGLIGHT, KEYWORD_TRIBUTE,
KEYWORD_DARKMAGICIAN, KEYWORD_BLUEEYESWHITEDRAGON,
KEYWORD_REDEYESBLACKDRAGON, KEYWORD_TIMEWIZARD,
KEYWORD_TRUE, KEYWORD_FALSE,
TOKEN_EOF
};
inline std::string tokenTypeToString(TokenType type) {
switch (type) {
case TokenType::LEFT_PAREN: return "LEFT_PAREN";
case TokenType::RIGHT_PAREN: return "RIGHT_PAREN";
case TokenType::LEFT_BRACE: return "LEFT_BRACE";
case TokenType::RIGHT_BRACE: return "RIGHT_BRACE";
case TokenType::COMMA: return "COMMA";
case TokenType::DOT: return "DOT";
case TokenType::MINUS: return "MINUS";
case TokenType::PLUS: return "PLUS";
case TokenType::SEMICOLON: return "SEMICOLON";
case TokenType::SLASH: return "SLASH";
case TokenType::STAR: return "STAR";
case TokenType::BANG: return "BANG";
case TokenType::BANG_EQUAL: return "BANG_EQUAL";
case TokenType::EQUAL: return "EQUAL";
case TokenType::EQUAL_EQUAL: return "EQUAL_EQUAL";
case TokenType::GREATER: return "GREATER";
case TokenType::GREATER_EQUAL: return "GREATER_EQUAL";
case TokenType::LESS: return "LESS";
case TokenType::LESS_EQUAL: return "LESS_EQUAL";
case TokenType::SUMMON_OP: return "SUMMON_OP (<<)";
case TokenType::DRAW_OP: return "DRAW_OP (>>)";
case TokenType::IDENTIFIER: return "IDENTIFIER";
case TokenType::STRING: return "STRING";
case TokenType::NUMBER: return "NUMBER";
case TokenType::KEYWORD_YUGI: return "KEYWORD_YUGI";
case TokenType::KEYWORD_LORDOFD: return "KEYWORD_LORDOFD";
case TokenType::KEYWORD_TOONWORLD: return "KEYWORD_TOONWORLD";
case TokenType::KEYWORD_RITUAL: return "KEYWORD_RITUAL";
case TokenType::KEYWORD_SETFIELD: return "KEYWORD_SETFIELD";
case TokenType::KEYWORD_KAIBA: return "KEYWORD_KAIBA";
case TokenType::KEYWORD_JOEY: return "KEYWORD_JOEY";
case TokenType::KEYWORD_SUMMON: return "KEYWORD_SUMMON";
case TokenType::KEYWORD_DRAW: return "KEYWORD_DRAW";
case TokenType::KEYWORD_JUDGMENTOFANUBIS: return "KEYWORD_JUDGMENTOFANUBIS";
case TokenType::KEYWORD_SOLEMNJUDGMENT: return "KEYWORD_SOLEMNJUDGMENT";
case TokenType::KEYWORD_FAIRYBOX: return "KEYWORD_FAIRYBOX";
case TokenType::KEYWORD_SWORDSOFREVEALINGLIGHT: return "KEYWORD_SWORDSOFREVEALINGLIGHT";
case TokenType::KEYWORD_TRIBUTE: return "KEYWORD_TRIBUTE";
case TokenType::KEYWORD_DARKMAGICIAN: return "KEYWORD_DARKMAGICIAN";
case TokenType::KEYWORD_BLUEEYESWHITEDRAGON: return "KEYWORD_BLUEEYESWHITEDRAGON";
case TokenType::KEYWORD_REDEYESBLACKDRAGON: return "KEYWORD_REDEYESBLACKDRAGON";
case TokenType::KEYWORD_TIMEWIZARD: return "KEYWORD_TIMEWIZARD";
case TokenType::KEYWORD_TRUE: return "KEYWORD_TRUE";
case TokenType::KEYWORD_FALSE: return "KEYWORD_FALSE";
case TokenType::TOKEN_EOF: return "EOF";
default: return "UNKNOWN";
}
}
struct Token {
TokenType type;
std::string lexeme;
int line;
Token() : type(TokenType::TOKEN_EOF), lexeme(""), line(0) {}
Token(TokenType type, std::string lexeme, int line)
: type(type), lexeme(lexeme), line(line) {}
std::string toString() const {
return "Line " + std::to_string(line) + ": " +
tokenTypeToString(type) + " [" + lexeme + "]";
}
};
class Scanner {
public:
Scanner(const std::string& source)
: source(source), start(0), current(0), line(1) {
keywords["Yugi"] = TokenType::KEYWORD_YUGI;
keywords["LordOfD"] = TokenType::KEYWORD_LORDOFD;
keywords["ToonWorld"] = TokenType::KEYWORD_TOONWORLD;
keywords["Ritual"] = TokenType::KEYWORD_RITUAL;
keywords["Kaiba"] = TokenType::KEYWORD_KAIBA;
keywords["Joey"] = TokenType::KEYWORD_JOEY;
keywords["Summon"] = TokenType::KEYWORD_SUMMON;
keywords["Draw"] = TokenType::KEYWORD_DRAW;
keywords["JudgmentOfAnubis"] = TokenType::KEYWORD_JUDGMENTOFANUBIS;
keywords["SolemnJudgment"] = TokenType::KEYWORD_SOLEMNJUDGMENT;
keywords["FairyBox"] = TokenType::KEYWORD_FAIRYBOX;
keywords["SwordsOfRevealingLight"] = TokenType::KEYWORD_SWORDSOFREVEALINGLIGHT;
keywords["Tribute"] = TokenType::KEYWORD_TRIBUTE;
keywords["DarkMagician"] = TokenType::KEYWORD_DARKMAGICIAN;
keywords["BlueEyesWhiteDragon"] = TokenType::KEYWORD_BLUEEYESWHITEDRAGON;
keywords["RedEyesBlackDragon"] = TokenType::KEYWORD_REDEYESBLACKDRAGON;
keywords["TimeWizard"] = TokenType::KEYWORD_TIMEWIZARD;
keywords["true"] = TokenType::KEYWORD_TRUE;
keywords["false"] = TokenType::KEYWORD_FALSE;
}
std::vector<Token> scanTokens() {
while (!isAtEnd()) {
start = current;
scanToken();
}
tokens.push_back(Token(TokenType::TOKEN_EOF, "", line));
return tokens;
}
private:
std::string source;
std::vector<Token> tokens;
std::map<std::string, TokenType> keywords;
int start;
int current;
int line;
bool isAtEnd() {
return current >= source.length();
}
char advance() {
return source[current++];
}
Token previous() {
if (tokens.empty()) return Token();
return tokens.back();
}
void addToken(TokenType type) {
std::string text = source.substr(start, current - start);
tokens.push_back(Token(type, text, line));
}
char peek() {
if (isAtEnd()) return '\0';
return source[current];
}
char peekNext() {
if (current + 1 >= source.length()) return '\0';
return source[current + 1];
}
bool peekString(const std::string& str) {
if (current + str.length() > source.length()) {
return false;
}
return source.substr(current, str.length()) == str;
}
bool match(char expected) {
if (isAtEnd()) return false;
if (source[current] != expected) return false;
current++;
return true;
}
void stringLiteral() {
char quoteType = source[current-1];
while (peek() != quoteType && !isAtEnd()) {
if (peek() == '\n') line++;
advance();
}
if (isAtEnd()) {
std::cerr << "Line " << line << ": Error! Unterminated string." << std::endl;
return;
}
advance();
std::string value = source.substr(start + 1, (current - start) - 2);
tokens.push_back(Token(TokenType::STRING, value, line));
}
void numberLiteral() {
while (isdigit(peek())) advance();
if (peek() == '.' && isdigit(peekNext())) {
advance();
while (isdigit(peek())) advance();
}
addToken(TokenType::NUMBER);
}
void identifier() {
while (isalnum(peek()) || peek() == '_') advance();
std::string text = source.substr(start, current - start);
TokenType type;
if (keywords.count(text)) {
type = keywords[text];
} else {
type = TokenType::IDENTIFIER;
}
addToken(type);
}
void scanToken() {
if (peekString("MillenniumEye:")) {
current += 14;
while (peek() != '\n' && !isAtEnd()) {
advance();
}
return;
}
if (peekString("ShadowRealm{")) {
current += 12;
while (!peekString("}") && !isAtEnd()) {
if (peek() == '\n') line++;
advance();
}
if (isAtEnd()) {
std::cerr << "Line " << line << ": Error! Unterminated ShadowRealm block." << std::endl;
return;
}
advance();
return;
}
if (peekString("#SetField")) {
current += 9;
<
656D
div>
addToken(TokenType::KEYWORD_SETFIELD);
return;
}
char c = advance();
switch (c) {
case '(': addToken(TokenType::LEFT_PAREN); break;
case ')': addToken(TokenType::RIGHT_PAREN); break;
case '{': addToken(TokenType::LEFT_BRACE); break;
case '}': addToken(TokenType::RIGHT_BRACE); break;
case ',': addToken(TokenType::COMMA); break;
case '.': addToken(TokenType::DOT); break;
case '-': addToken(TokenType::MINUS); break;
case '+': addToken(TokenType::PLUS); break;
case ';': addToken(TokenType::SEMICOLON); break;
case '*': addToken(TokenType::STAR); break;
case '/': addToken(TokenType::SLASH); break;
case '!': addToken(match('=') ? TokenType::BANG_EQUAL : TokenType::BANG); break;
case '=': addToken(match('=') ? TokenType::EQUAL_EQUAL : TokenType::EQUAL); break;
case '<': addToken(match('<') ? TokenType::SUMMON_OP : (match('=') ? TokenType::LESS_EQUAL : TokenType::LESS)); break;
case '>': addToken(match('>') ? TokenType::DRAW_OP : (match('=') ? TokenType::GREATER_EQUAL : TokenType::GREATER)); break;
case ' ':
case '\r':
case '\t':
break;
case '\n':
line++;
break;
case '"': stringLiteral(); break;
default:
if (isdigit(c)) {
numberLiteral();
} else if (isalpha(c) || c == '_') {
identifier();
} else {
if ((unsigned char)c >= 128) {
// Ignore UTF-8 chars
} else {
std::cerr << "Line " << line << ": Error! Unexpected character '" << c << "'" << std::endl;
}
}
break;
}
}
};
#endif