C: correct usage of strtok_r

Question

How can I use strtok_r instead of strtok to do this?

char *pchE = strtok(NULL, \" \");

Now I\'m trying to use strtok_r properl

Answer 1

Tested example:

#include 
#include 

int main(void)
{
    char str[] = "1,22,333,4444,55555";
    char *rest = NULL;
    char *token;

    for (token = strtok_r(str, ",", &rest);
         token != NULL;
         token = strtok_r(NULL, ",", &rest)) {   
        printf("token:%s\n", token);
    }

    return 0;
}

Result.

token:1
token:22
token:333
token:4444
token:55555

Test: http://codepad.org/6xRdIecI

From linux documentation where emphasis is mine:

char *strtok_r(char *str, const char *delim, char **saveptr);

The strtok_r() function is a reentrant version strtok(). The saveptr argument is a pointer to a char * variable that is used internally by strtok_r() in order to maintain context between successive calls that parse the same string.

On the first call to strtok_r(), str should point to the string to be parsed, and the value of saveptr is ignored. In subsequent calls, str should be NULL, and saveptr should be unchanged since the previous call.

Different strings may be parsed concurrently using sequences of calls to strtok_r() that specify different saveptr arguments.