正则表达式

获取字符串中的参数：

方法一：strtok（）

#include<stdio.h>
#include<string.h>


int main(void)
{    
    char url[]="rtsp://223.99.188.13/TVOD/88888888/224/3221226214/102553956_0.smil?timeshift=1&startpos=20190129T053201Z";
    char  *mpath = url;
    char *temp = strtok(mpath,"?&");
    static int i = 0,n =0,m=0;
    char *split[i];
    char *tshift[n];
    char *spos[m];
    
    char *mURL;
    int timeshift;
    char *startpos; 
    while(temp)
    {
        split[i] = temp;
        temp = strtok(NULL,"?&");
        i++;
    }
    mURL = split[0];
    
    temp = strtok(split[1],"=");
    while(temp)
    {
        tshift[n] = temp;
        temp= strtok(NULL,"=");
        n++;
    }
    if(strcmp(tshift[0],"timeshift")==0)
        timeshift = atoi(tshift[1]);
    
    temp = strtok(split[2],"=");
    while(temp)
    {
        spos[m] = temp;
        temp= strtok(NULL,"=");
        m++;
    }
    if(strcmp(spos[0],"startpos")==0)
        startpos = spos[1];
    printf("%s
%d
%s
",mURL,timeshift,startpos);
    
    int y;
    int mon;
    int d;
    int h;
    int min;
    int s;
    sscanf(startpos, "%4d%02d%2dT%2d%2d%2dZ", &y, &mon, &d, &h, &min, &s);
    printf("%d年%d月%d日 %d:%d:%d
",y,mon,d,h,min,s);
    
    printf("url = %s 
",mpath);
    return 0;
}

方法二：sscanf（）

#include<stdio.h>
#include<string.h>


int main(void)
{    
    char url[]="rtsp://223.99.188.13/TVOD/88888888/224/3221226214/102553956_0.smil?timeshift=1&startpos=20190129T053201Z";
    char  *mpath = url;
    int ret;
    char flag[32];
    char path[1024];
    char pos[32];
    ret = sscanf(url, "%[^?]?timeshift=%[^&]&startpos=%[^Z]", path, flag, pos);
    printf("path=%s, flag=%s, pos=%s
", path, flag, pos);
    
    strtok(mpath,"?");
    printf("url = %s 
",url);
    printf("mpath = %s 
",mpath);
}