forked from krait-yxin/Woo
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Token.cpp
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Token.cpp
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//
// Created by TanGreen on 15/12/31.
//
#include "Token.h"
#include <fstream>
//TODO add '+' to regex engine is better
//TODO 正则引擎不是贪婪的
#define REX_NUMBER "(0|1|2|3|4|5|6|7|8|9)"
#define REX_CHAR "(A|B|C|D|E|F|G|H|I|J|K|L|M|N|O|P|Q|R|S|T|U|V|W|X|Y|Z|a|b|c|d|e|f|g|h|i|j|k|l|m|n|o|p|q|r|s|t|u|v|w|x|y|z)"
enum TokenSymbol {
T_DEF,
T_STRING,
T_INT,
T_IDENTIFIER,
T_IF,
T_WHILE,
T_NUMBER,
T_BRACE_SL,
T_BRACE_SR,
T_BRACE_ML,
T_BRACE_MR,
T_BRACE_LL,
T_BRACE_LR,
T_LTHAN,
T_GTHAN,
T_GEQUAL,
T_EQUAL,
T_EEQUAL,
T_LEQUAL,
T_NON,
T_ADD,
T_MIN,
T_MUL,
T_DIV,
T_COMMA,
T_END,
T_EXTERN,
T_RETURN,
T_SQUOTE,
T_DQUOTE,
T_ESCAPE,
T_BLANK
};
Token::Token() {
}
void Scan::getToken() {
string s = string(T_map[T_IDENTIFIER])
+ string("|") + string(T_map[T_NUMBER])
+ string("|") + string(T_map[T_BRACE_SL])
+ string("|") + string(T_map[T_BRACE_SR])
+ string("|") + string(T_map[T_BRACE_ML])
+ string("|") + string(T_map[T_BRACE_MR])
+ string("|") + string(T_map[T_BRACE_LL])
+ string("|") + string(T_map[T_BRACE_LR])
+ string("|") + string(T_map[T_NON])
+ string("|") + string(T_map[T_GTHAN])
+ string("|") + string(T_map[T_LTHAN])
+ string("|") + string(T_map[T_EQUAL])
+ string("|") + string(T_map[T_ADD])
+ string("|") + string(T_map[T_MIN])
+ string("|") + string(T_map[T_MUL])
+ string("|") + string(T_map[T_DIV])
+ string("|") + string(T_map[T_COMMA])
+ string("|") + string(T_map[T_SQUOTE])
+ string("|") + string(T_map[T_DQUOTE])
+ string("|") + string(T_map[T_ESCAPE])
+ string("|") + string(T_map[T_BLANK])
+ string("|") + string(T_map[-1]); //no use symnbol
RexHandle rh;
rh.setRextext(s);
rh.run();
fstream in;
ofstream out;
in.open(srcfile);
out.open(outfile, ios::trunc);
string ts;
int line = 0;
vector<pair<int, int> > tpair;
while (getline(in, ts)) {
line++;
tpair = rh.compareString(ts);
for (int i = 0; i < tpair.size(); ++i) {
if (tpair[i].first >= 0 && tpair[i].second >= 0) {
Token *ttoken = new Token;
ttoken->start = tpair[i].first;
ttoken->end = tpair[i].second;
string tmp = ts.substr((unsigned long) ttoken->start, (unsigned long) ttoken->end - ttoken->start + 1);
ttoken->token = getTokenId(tmp);
ttoken->value = tmp;
ttoken->lineIndex = line;
list_token.push_back(ttoken);
out << "Line:" << ttoken->lineIndex << " At:" << ttoken->start << " TokenType:" << ttoken->token <<
" Value= " << tmp << endl;
}
}
}
in.close();
out.close();
}
Scan::Scan() {
T_map.insert(pair<int, string>(T_IDENTIFIER, string(REX_CHAR) + string("*")));
T_map.insert(pair<int, string>(T_NUMBER, string(REX_NUMBER) + string("*")));
T_map.insert(pair<int, string>(T_BRACE_SL, string("\\(")));
T_map.insert(pair<int, string>(T_BRACE_SR, string("\\)")));
T_map.insert(pair<int, string>(T_BRACE_ML, string("\\[")));
T_map.insert(pair<int, string>(T_BRACE_MR, string("\\]")));
T_map.insert(pair<int, string>(T_BRACE_LL, string("\\{")));
T_map.insert(pair<int, string>(T_BRACE_LR, string("\\}")));
T_map.insert(pair<int, string>(T_LTHAN, string("\\<")));
T_map.insert(pair<int, string>(T_GTHAN, string("\\>")));
T_map.insert(pair<int, string>(T_EQUAL, string("\\=")));
T_map.insert(pair<int, string>(T_NON, string("\\!")));
T_map.insert(pair<int, string>(T_ADD, string("\\+")));
T_map.insert(pair<int, string>(T_MIN, string("\\-")));
T_map.insert(pair<int, string>(T_MUL, string("\\*")));
T_map.insert(pair<int, string>(T_DIV, string("\\/")));
T_map.insert(pair<int, string>(T_COMMA, string("\\,")));
T_map.insert(pair<int, string>(T_SQUOTE, string("\\'")));
T_map.insert(pair<int, string>(T_DQUOTE, string("\\\"")));
T_map.insert(pair<int, string>(T_ESCAPE, string("\\\\")));
T_map.insert(pair<int, string>(T_BLANK, string("\\ "))); //here blank don't need escape !!!! WTF
T_map.insert(pair<int, string>(-1, string("\\~|\\@|\\#|\\$|\\^|\\_|\\?")));
}
int Scan::getTokenId(string s) {
if (s[0] == '\32') return T_BLANK;
if (s == "string") return T_STRING;
if (s == "int") return T_INT;
if (s == "if") return T_IF;
if (s == "while") return T_WHILE;
if (s == "(") return T_BRACE_SL;
if (s == ")") return T_BRACE_SR;
if (s == "[") return T_BRACE_ML;
if (s == "]") return T_BRACE_MR;
if (s == "{") return T_BRACE_LL;
if (s == "}") return T_BRACE_LR;
if (s == ">") return T_GTHAN;
if (s == "<") return T_LTHAN;
if (s == "!") return T_NON;
if (s == "=") return T_EQUAL;
if (s == "+") return T_ADD;
if (s == "-") return T_MIN;
if (s == "*") return T_MUL;
if (s == "/") return T_DIV;
if (s == ",") return T_COMMA;
if (s == "'") return T_SQUOTE;
if (s == "\"") return T_DQUOTE;
if (s == "def") return T_DEF;
if (s == "extern") return T_EXTERN;
if (s == "end") return T_END;
if (s == "return") return T_RETURN;
if (s == " ") return T_BLANK;
if (s == "\\") return T_ESCAPE;
for (int i = 0; i < s.size(); ++i) {
if (!(s[i] >= '0' && s[i] <= '9'))
break;
if (i == s.size() - 1) return T_NUMBER;
}
return T_IDENTIFIER;
}