[C++知识库]c语言字符串处理函数

宽字符转char字符

字符串从wchar_t转换成char
#include <stdlib.h>
errno_t wcstombs_s( size_t *pReturnValue, char *mbstr, size_t sizeInBytes, const wchar_t *wcstr, size_t count );

字符串查找函数strstr

char* strstr(char*, const char*);

字符串以字符分割strtok_s

char* strtok_s(
char* str,
const char* delimiters,
char** context
);

wchar_t* wcstok_s(
wchar_t* str,
const wchar_t* delimiters,
wchar_t** context
);

unsigned char* _mbstok_s(
unsigned char* str,
const unsigned char* delimiters,
char** context
);

int IOCsInitialize(WCHAR* curPath)
{
    FILE* fr;
    char line[1000];
    char* str = NULL;
    if (fopen_s(&fr, ".\\iocs\\hash-APT-202101-06.txt", "r")) {
        printf("Open IOCs File failed,%d\n", GetLastError());
        return -1;
    }
    while (!feof(fr))
    {
        fgets(line, 1000, fr);
        char* p = strstr(line, ";");
        if (p != NULL)
        {
            if(strtok_s(line, ";" ,&str))
            {
                switch (strlen(line))
                {
                    case 32:
                        printf("md5");
                        break;
                    case 40:
                        printf("sha1");
                        break;
                    case 64:
                        printf("sha256");
                        break;
                    default:
                        break;
                }
            
            }
            
        }
     
    }
    printf("%s", line);
    fclose(fr);
    return 0;
}

https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/strtok-s-strtok-s-l-wcstok-s-wcstok-s-l-mbstok-s-mbstok-s-l?view=msvc-160