ledehui-B/src/common/utils.ts

//加法函数，用来得到精确的加法结果 
export function accAdd(arg1: any,arg2: any){ 
var r1,r2,m; 
try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0} 
try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0} 
m=Math.pow(10,Math.max(r1,r2)) 
return (arg1*m+arg2*m)/m 
} 


//减法函数，用来得到精确的加法结果 
//说明：javascript的加法结果会有误差，在两个浮点数相加的时候会比较明显。这个函数返回较为精确的加法结果。 
//调用：accAdd(arg1,arg2) 
//返回值：arg1加上arg2的精确结果 
export function accSub(arg1: any,arg2: any){
    var r1,r2,m,n;
    try{r1=arg1.toString().split(".")[1].length}catch(e){r1=0}
    try{r2=arg2.toString().split(".")[1].length}catch(e){r2=0}
    m=Math.pow(10,Math.max(r1,r2));
    //动态控制精度长度
    n=(r1>=r2)?r1:r2;
    return ((arg1*m-arg2*m)/m).toFixed(n);
}

//乘法函数
export function accMul(arg1:any, arg2:any){
   var t1 = 0, t2 = 0,s1 = arg1.toString(), s2 = arg2.toString(),r1,r2;
    try {t1= s1.split(".")[1].length;}catch (e) {}
    try {t2= s2.split(".")[1].length;}catch (e) {}
	r1 = Number(s1.replace(".", ""));
	r2 = Number(s2.replace(".", ""));
    return r1 * r2 / Math.pow(10, t1+t2);
}

// 除法
export function accDiv(arg1:any, arg2:any) {
    var t1 = 0, t2 = 0, s1 = arg1.toString(), s2 = arg2.toString(),r1,r2;
    try {t1 = s1.split(".")[1].length;}catch (e) {}
    try {t2 = s2.split(".")[1].length;}catch (e) {}
	r1 = Number(s1.replace(".", ""));
	r2 = Number(s2.replace(".", ""));
	return (r1 / r2) * Math.pow(10, t2 - t1);
}
/**
 * 格式化数字
 * @param num 要格式化的数字
 * @param len 保留小数位数默认2
 * @param type 格式化方式0:四舍五入 1:进一  2:舍去 默认0
 * @return string
 */
 export function format_number(num:any,len:any,type:any) {
    len = len > 0 && len <= 20 ? len : 2;
    var result = parseFloat(num);
    num=isNaN(result)?0:result;
    var numpow=Math.pow(10,len);
    var numcheng=accMul(num,numpow);
    if(type==1){//ceil进一 
    	result = Math.ceil(numcheng);
    }else if(type==2){//floor舍去
    	result = Math.floor(numcheng);
    }else{//round四舍五入 
    	result = Math.round(numcheng);
    }
    result =accDiv(result,numpow);
    var s_x = result.toString();
    var pos_decimal = s_x.indexOf('.');
    if (pos_decimal < 0) {pos_decimal = s_x.length;s_x += '.';}
    while (s_x.length <= pos_decimal + len) {s_x += '0';}
    return s_x;
}

export function Arabia_To_SimplifiedChinese(Num: any): any {
  for (let i = Num.length - 1; i >= 0; i--) {
      Num = Num.replace(',', '');// 替换Num中的“,”
      Num = Num.replace(' ', '');// 替换Num中的空格
  }

  // 验证输入的字符是否为数字
  if (isNaN(Num)) {
      alert('请检查小写金额是否正确');
      return;
  }

  // 字符处理完毕后开始转换，采用前后两部分分别转换(小数点为界限)
 var part = String(Num).split('.');

  // 初始化一个字符串
  var newchar = '';

  // 小数点前进行转化
  for (let i = part[0].length - 1; i >= 0; i--) {
      // 若数量超过拾亿单位，提示
      if (part[0].length > 10) {
          // alert("位数过大，无法计算");
          return '';
      }

     let tmpnewchar:string = '';
     let perchar:any = part[0].charAt(i);

      switch (perchar) {
          case '0': tmpnewchar = '零' + tmpnewchar; break;
          case '1': tmpnewchar = '一' + tmpnewchar; break;
          case '2': tmpnewchar = '二' + tmpnewchar; break;
          case '3': tmpnewchar = '三' + tmpnewchar; break;
          case '4': tmpnewchar = '四' + tmpnewchar; break;
          case '5': tmpnewchar = '五' + tmpnewchar; break;
          case '6': tmpnewchar = '六' + tmpnewchar; break;
          case '7': tmpnewchar = '七' + tmpnewchar; break;
          case '8': tmpnewchar = '八' + tmpnewchar; break;
          case '9': tmpnewchar = '九' + tmpnewchar; break;
      }
      switch (part[0].length - i - 1) {
          case 0: tmpnewchar = tmpnewchar; break;
          case 1: if (perchar != 0) tmpnewchar = tmpnewchar + '十'; break;
          case 2: if (perchar != 0) tmpnewchar = tmpnewchar + '百'; break;
          case 3: if (perchar != 0) tmpnewchar = tmpnewchar + '千'; break;
          case 4: tmpnewchar = tmpnewchar + '万'; break;
          case 5: if (perchar != 0) tmpnewchar = tmpnewchar + '十'; break;
          case 6: if (perchar != 0) tmpnewchar = tmpnewchar + '百'; break;
          case 7: if (perchar != 0) tmpnewchar = tmpnewchar + '千'; break;
          case 8: tmpnewchar = tmpnewchar + '亿'; break;
          case 9: tmpnewchar = tmpnewchar + '十'; break;
      }
      newchar = tmpnewchar + newchar;
  }
  // 替换所有无用汉字，直到没有此类无用的数字为止
  while (newchar.search('零零') != -1 || newchar.search('零亿') != -1 || newchar.search('亿万') != -1 || newchar.search('零万') != -1) {
      newchar = newchar.replace('零亿', '亿');
      newchar = newchar.replace('亿万', '亿');
      newchar = newchar.replace('零万', '万');
      newchar = newchar.replace('零零', '零');
  }
  // 替换以“一十”开头的，为“十”
  if (newchar.indexOf('一十') == 0) {
      newchar = newchar.substr(1);
  }
  // 替换以“零”结尾的，为“”
  if (newchar.lastIndexOf('零') == newchar.length - 1) {
      newchar = newchar.substr(0, newchar.length - 1);
  }
  return newchar;
}