ProcessString.h

//Linux & C++11

#pragma once

//包含系统头文件
#include <string>
#include <sstream>
#include <vector>

//宏定义:参数流向
#define IN
#define OUT
#define INOUT

//使用命名
using std::string;
using std::istringstream;
using std::vector;

namespace sinicheveen
{
    class ProcessString
    {
    public:
    //group 1:判断型函数

        //判断一个字符串是不是数字字符串
        //e.g. "023456789" --> true; "12A56" --> false
        static bool isNumString(IN const string& strIn);

        //判断一个字符串是不是以逗号分隔的数字字符串,且字符串最后一个字符不能是逗号,中间不能有空格
        //e.g. "1,2,3,4" --> true; "1,3.14,9" --> true; "1,2,3,4," --> false; "1,A,5" --> false
        static bool isNumStringWithComma(IN const string& strIn);

        //判断一个字符串是不是以某种分隔符分隔的数字字符串,且字符串最后一个字符不能是分隔符,中间不能有空格
        //e.g. "1,2,3,4" --> true; "1,3.14,9" --> true; "1,2,3,4," --> false; "1,A,5" --> false
        static bool isNumStringWithSeparator(IN const string& strIn, IN const char cSeparator = ',');

    //group 2:字符串转数字

        /*
         *Name:stringToNumber
         *Description:字符串转数字
         *Input:IN const string& strIn,一个字符串
         *Return:T:转换后的数字
         *Caution:
         */
        template<typename T>
        T stringToNumber(IN const string& strIn)
        {
            istringstream iss(strIn);
            T num;
            iss >> num;
            return num;
        }   //stringToNumber()

        /*
         *Name:extractNumFromString
         *Description:从数字字符串中提取出数字
         *Input:IN const string& strIn,以分隔符分隔的一个数字字符串
         *          OUT vector<T>& vExtractedNums,提取出的数字
         *          IN const char cSeparator = ',',数字之间的分隔符,默认是英文逗号
         *Return:bool,成功返回 true,失败返回 false
         *Caution:
         */
        template <typename T>
        bool extractNumFromString(IN const string& strIn, OUT vector<T>& vExtractedNums, IN const char cSeparator = ',')
        {
            //判断是不是数字字符串
            for (const auto& iChar : strIn)
            {
                if ((iChar >= '0' && iChar <= '9') || iChar == '.' || iChar == cSeparator)
                {
                    continue;
                }
                else
                {
                    return false;
                }
            }

            //提取数字
            size_t startPos = 0;
            do
            {
                size_t endPos = strIn.find(cSeparator, startPos);
                if (endPos != string::npos)
                {
                    string strNum;
                    strNum.assign(strIn, startPos, endPos - startPos);
                    T num;
                    num = stringToNumber<T>(strNum);
                    vExtractedNums.push_back(num);
                    startPos = endPos + 1;
                    if (startPos > (strIn.size() - 1))
                    {
                        break;
                    }
                }
                else
                {
                    string strNum;
                    strNum.assign(strIn, startPos, strIn.size() - startPos);
                    T num;
                    num = stringToNumber<T>(strNum);
                    vExtractedNums.push_back(num);
                    break;
                }
            } while (1);

            return true;
        }   //extractNumFromString()

    //group 3:格式处理函数

        //移除行首和行尾的空白字符
        static void rmSpaceInBegAndEnd(INOUT string& strIn);

    //gruop 4:从键盘读取

        //从键盘读取一行字符串,直到遇到 \n 为止,中间遇到其它空白字符,仍继续
        static void readStringEndByEnter(OUT string& strWhatRead);

        //从键盘读取一行字符串,直到遇到多个 \n 为止(由用户定义个数),中间遇到其它空白字符,仍继续
        static void readStringEndByMultiEnter(OUT string& strWhatRead, IN const int32_t numOfEnter = 2);

    //group 5:字符串分隔

        //分隔 C 风格字符串
        static void spliceString(IN char* pcStrIn, OUT vector<string>& vSubStrings, IN const char* pcSepartor);

    };  //ProcessString

}   //sinicheveen


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05-11 17:23