Question

我有一个关键字需要循环以匹配wchar_t字符串。

字符串是

5698 @＃$％notepad ^＆amp; 343235 / chrome $ 56＆amp; 6556firefox $％＃$ 23

，关键字为

记事本，chrome，firefox

我尝试循环它总是返回FALSE并且当我看到cpu使用时。它如此广泛，约占50％。

这个代码。

            unsigned int i;

            wchar_t * keyword[] = {L"chrome", L"notepad", L"firefox");

            for (i = 0; i < 3; i++)
            {
                wchar_t * s = L"5698@#$%notepad^&343235/ chrome $56&6556firefox$%#$23";

                wcmatch m;

                wchar_t regex[MAX_PATH];

                swprintf(regex, MAX_PATH, L"%s%s", L".+", keyword[i]);

                wregex r(regex);

                if (regex_search(s, m, r))
                {
                    cout << "It's found" << endl;
                }

                else
                {
                    cout << "It's not found" << endl;
                }

我的真实项目代码。枚举进程并匹配进程并返回bool值。

#include "stdafx.h"
#include <iostream>
#include <Windows.h>
#include <Psapi.h>
#include <string>
#include <regex>

using namespace std;

int main()
{
    FILE *pFile;
    wchar_t *file = L"d:\\a.txt";
    wchar_t line[100][MAX_PATH];
    unsigned int a = 0;
    if (_wfopen_s(&pFile, file, L"r, ccs = UNICODE") == 0)
    {
        while (fgetws(line[a], 100, pFile))
        {
            a++;
        }
    }

    DWORD aProcesses[1024], cbNeeded, cProcesses;
    unsigned int i;

    if (!EnumProcesses(aProcesses, sizeof(aProcesses), &cbNeeded))
    {
        return 1;
    }

    cProcesses = cbNeeded / sizeof(DWORD);

    wchar_t jszProcessName[4096] = { 0 };

    for (i = 0; i < cProcesses; i++)
    {
        if (aProcesses[i] != 0)
        {
            wchar_t szProcessName[MAX_PATH] = TEXT("Unknown");
            DWORD processID = aProcesses[i];

            HANDLE hProcess = OpenProcess(PROCESS_QUERY_INFORMATION | 
                                        PROCESS_VM_READ,
                                        FALSE, processID);

            if (NULL != hProcess)
            {
                HMODULE hMod;
                DWORD cbNeeded;

                if (EnumProcessModules(hProcess, &hMod, sizeof(hMod),
                    &cbNeeded))
                {
                    GetModuleBaseName(hProcess, hMod, szProcessName,
                        sizeof(szProcessName) / sizeof(TCHAR));

                    wcsncat_s(jszProcessName,szProcessName , 1000);


                }
            }
        }
    }


    unsigned int c;

        for (c = 0; c < a; c++)
        {
            wchar_t * s = jszProcessName;

            wcmatch m;

            wchar_t regex[MAX_PATH];

            swprintf(regex, MAX_PATH, L"%s%s", L".+", line[c]);

            wregex r(regex);

            if (regex_search(s, m, r))
            {
                cout << "It's found" << endl;
            }

            else
            {
                cout << "It's not found" << endl;
            }

        }




    return 0;
}

Answer 1

将您的正则表达式关键字用|个字符分隔：

(notepad|chrome|firefox)

https://regex101.com/r/PAZBbx/1

循环wregex总是返回false和高CPU使用率约50％

1 个答案: