gtest.js

var readline = require('readline');
var fs = require('fs');
var os = require('os');

var fReadName = './test.cpp';
var fWriteName = './test.deal.cpp';
var fRead = fs.createReadStream(fReadName);
var fWrite = fs.createWriteStream(fWriteName);

var objReadline = readline.createInterface({
    input: fRead,
});

var func = []

var retType = (func) => {
    var ftype = "unknowRetType";
    for(let val of func){
        if (val.includes("output =")) {
            ftype = val.trim().split("output")[0].trim();
            break;
        }
    }

    return ftype;
}

var funcName = (func) => {
    let fname = "unknowFuncName";
    for(let val of func){
        if (val.includes("void")) {
            
            let arr = val.trim().split(" ");
            let name = arr[1];
            
            let start = name.indexOf("_");
            let end = name.indexOf("(");
            fname = name.substring(start + 1, end);
            if (fname.charAt(fname.length -1) >= '0' && fname.charAt(fname.length -1) <= '9') {
                fname = fname.substring(0, fname.length -1);
            }
            // console.log(name, fname, start + 1, end);
            break;
        }
    }
    
    return fname;
}

var inType = (func) => {
    let ret = {
        a: "unknowA",
        b: "unknowB",
        name: "",
    };
    
    for(let val of func){
        if (val.includes("a =")) {
            ret.a = val.trim().split("=")[0].trim();
        }

        if (val.includes("b =")) {
            ret.b = val.trim().split("=")[0].trim();
            break;
        }
    }

    let temp = ret.a.split(" ");
    ret.name += "_";
    ret.name += (temp.length === 3) ? ("u" + temp[1]) : (temp[0]);

    temp = ret.b.split(" ");
    ret.name += "_";
    ret.name += (temp.length === 3) ? ("u" + temp[1]) : (temp[0]);

    return ret;
}


var flag = true;
objReadline.on('line', (line) => {
    if (line.startsWith('//')) {
        func = [];
    }
    func.push(line);

    if(line === "}" && flag){
        for(let val of func){
            let name = "lcq";
            // 函数声明
            if (val.includes("void ")) {
                val = retType(func) + " " + funcName(func) + inType(func).name + "(" + inType(func).a + ", " + inType(func).b + ")";
            }

            if (val.includes("CIOV i2;")) {
                val = "    CIOV i1, i2;";
            }

            if (val.includes("}")) {
                fWrite.write("    return output;" + os.EOL);
            }

            // 过滤不打印的
            if (val.includes("cout") || val.includes("a =") || val.includes("b =") || val.includes("CIOV i1;") || val === "") {
                continue;
            }
 
            fWrite.write(val + os.EOL); // 下一行
        }
        fWrite.write(os.EOL); // 下一行
        flag = true;
    }
});

objReadline.on('close', () => {
    
});