main.cpp

来自「开放源码的编译器open watcom 1.6.0版的源代码」· C++ 代码 · 共 60 行

//Revision 1.1  1994/04/08  15:27:59  peter
//Initial revision
//

#include <fstream.h>
#include <stdlib.h>
#include <fcntl.h>
#include <unistd.h>

#include "globals.h"
#include "parser.h"
#include "dfa.h"

char *fileName;
bool sFlag = false;
bool bFlag = false;

int main(unsigned argc, char *argv[]){
    fileName = NULL;
    if(argc == 1)
	goto usage;
    while(--argc > 1){
	char *p = *++argv;
	while(*++p != '\0'){
	    switch(*p){
	    case 'e':
		xlat = asc2ebc;
		talx = ebc2asc;
		break;
	    case 's':
		sFlag = true;
		break;
	    case 'b':
		sFlag = true;
		bFlag = true;
		break;
	    default:
		goto usage;
	    }
	}
    }
    fileName = *++argv;
    int fd;
    if(fileName[0] == '-' && fileName[1] == '\0'){
	fileName = "<stdin>";
	fd = 0;
    } else {
	if((fd = open(fileName, O_RDONLY)) < 0){
	    cerr << "can't open " << fileName << "\n";
	    return 1;
	}
    }
    parse(fd, cout);
    return 0;
usage:
    cerr << "usage: re2c [-esb] name\n";
    return 2;
}