strtok的实现

char *
strtok_t(char *src, const char *split)
{
    static char *static_src;
    char *tmp_src, *tmp;
    int find;

    if(src != NULL)
        static_src = src;

    tmp_src = tmp = static_src;

    if(*static_src == '\0')
        return NULL;

    if(split == NULL)
        return tmp_src;

    while(*tmp != '\0')
    {
        find = 0;

        if(*tmp == *split)
        {
            find = 1;
            break;
        }

        tmp++;
    }

    if(find == 1)
    {
        static_src = tmp + 1;
        *tmp = '\0';
    }
    else
    {
        static_src = tmp;
    }

    return tmp_src;
}





int
main(void)
{
    char test1[] = "mao,ying,chun";
    char *test2 = "mao,ying,chun";

    char *p;

    p = strtok(test1, ",");
    while(p)
    {
        printf("%s  ", p);
        p = strtok(NULL, ",");
    }

    printf("\n");

    char test3[] = ",jonas,mao,ni,tshto,sthoista,sthoihattttt, , ,sfi";

    p = strtok_t(test3, ",");
    while(p)
    {
        printf("%s ", p);
        p = strtok_t(NULL, ",");
    }

#if 0 // as strtok need change the const string test2, so the following code perform error.
    p = strtok(test2, ",");
    while(p)
    {
        printf("%s, ", p);
        p = strtok(NULL, ",");
    }
#endif
    printf("\n");
    return 0;
}