golang 分页

//通过页码尺寸和当前页码以及总数据条数，获取limit，offset
//20,2,34
func ToLimitOffset(sizeIn string, indexIn string, count int) (limit int, offset int) {
    size, _ := strconv.Atoi(sizeIn)
    index, _ := strconv.Atoi(indexIn)
    //1
    if count == 0 {
        return size, 0
    }
    var pageMax int
    //1%10
    if count%size == 0 {
        pageMax = count / size
    } else {
        //1
        pageMax = count/size + 1
    }

    if pageMax <= index {
        index = pageMax
    }
    offset = size * (index - 1)

    if offset == -10 {
        offset = 0
    }
    return size, offset
}