config9.b.c

来自「a little DFA compiler.」· C语言 代码 · 共 185 行

/* Generated by re2c */
#line 1 "config9.b.re"
#include <cstring>
#include <iostream>

struct Scanner
{
	Scanner(char *txt)
		: cur(txt), lim(txt + strlen(txt))
	{
	}
	
	char    *cur;
	char    *lim;
	char	*ptr;
	char	*ctx;
	char    *tok;
};

enum What
{
	UNEXPECTED,
	KEYWORD,
	NUMBER,
	EOI
};

char * tokens[] = { "UNEXPECTED", "KEYWORD", "NUMBER", "EOI" };

void fill(int)
{
}

int scan(Scanner &s)
{
	char *cursor = s.cur;

	if(cursor == s.lim)
		return EOI;
	
std:
	s.tok = cursor;

{
	static const unsigned char yybm[] = {
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		128, 128, 128, 128, 128, 128, 128, 128, 
		128, 128,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
		  0,   0,   0,   0,   0,   0,   0,   0, 
	};

#line 81 "<stdout>"
	{
		unsigned char curr;

		if((s.lim - s.cur) < 3) fill(3);
		curr = (unsigned char)*s.cur;
		if(curr <= ' ') {
			if(curr <= 0x09) {
				if(curr <= 0x08) goto xx9;
				goto xx6;
			} else {
				if(curr <= 0x0A) goto xx8;
				if(curr <= 0x1F) goto xx9;
				goto xx6;
			}
		} else {
			if(curr <= '9') {
				if(curr <= '/') goto xx9;
				goto xx4;
			} else {
				if(curr <= '`') goto xx9;
				if(curr >= 'c') goto xx9;
			}
		}
		s.ctx = s.cur + 1;
		++s.cur;
		if((curr = (unsigned char)*s.cur) <= '/') goto xx3;
		if(curr == '1') goto xx15;
		if(curr <= '9') goto xx12;
xx3:
#line 68 "config9.b.re"
		{
		return UNEXPECTED;
	}
#line 115 "<stdout>"
xx4:
		++s.cur;
		curr = (unsigned char)*s.cur;
		goto xx11;
xx5:
#line 58 "config9.b.re"
		{ return NUMBER;  }
#line 123 "<stdout>"
xx6:
		++s.cur;
xx7:
#line 61 "config9.b.re"
		{
		if(s.cur == s.lim)
			return EOI;
		cursor = s.cur;
		goto std;
	}
#line 134 "<stdout>"
xx8:
		curr = (unsigned char)*++s.cur;
		goto xx7;
xx9:
		curr = (unsigned char)*++s.cur;
		goto xx3;
xx10:
		++s.cur;
		if(s.lim == s.cur) fill(1);
		curr = (unsigned char)*s.cur;
xx11:
		if(yybm[0+curr] & 128) {
			goto xx10;
		}
		goto xx5;
xx12:
		++s.cur;
		if(s.lim == s.cur) fill(1);
		curr = (unsigned char)*s.cur;
		if(curr <= '/') goto xx14;
		if(curr <= '9') goto xx12;
xx14:
		s.cur = s.ctx;
#line 57 "config9.b.re"
		{ return KEYWORD; }
#line 160 "<stdout>"
xx15:
		++s.cur;
		if((curr = (unsigned char)*s.cur) <= '/') goto xx16;
		if(curr <= '9') goto xx12;
xx16:
		s.cur = s.ctx;
#line 56 "config9.b.re"
		{ return KEYWORD; }
#line 169 "<stdout>"
	}
}
#line 71 "config9.b.re"

}

int main(int,char**)
{
	Scanner s("a77 a1 b8 b1");
	
	int t, n = 0;
	while ((t = scan(s)) != EOI)
	{
		std::cout << (++n) << ": " << tokens[t] << " = \""; std::cout.write(s.tok, s.cur-s.tok); std::cout << "\"" << std::endl;
	}
}