strtok c multiple chars as one delimiter

Question

Is it possible to use multiple chars as one delimiter?

I would like a string as separator for another string.

char * input = "inputvalue1SEPARATORSTRINGinputvalue2SEPARATORSTRINGinputvalue2";
char * output = malloc(sizeof(char*));
char * delim = "SEPARATORSTRING";

char * example()
{
    char * ptr = strtok(input, delim);

    while (ptr != NULL)
    {
      output = strcat(output, ptrvar);
      output = strcat(output, "\n");
      ptr = strtok(NULL, delim);
    }

    return output;
}

Return value printed with printf:

inputvalue1
inputvalue2
inputvalue3

Answer 1

No, according to the manual page for strtok():

The delim argument specifies a set of bytes that delimit the tokens in the parsed string.

If you want to use a multi-byte string as delimiter, there is no built-in function that behaves like strtok(). You would have to use strstr() instead to find occurrences of the delimiter string in the input, and advance manually.

Here's an example from this answer:

char *multi_tok(char *input, char *delimiter) {
    static char *string;
    if (input != NULL)
        string = input;

    if (string == NULL)
        return string;

    char *end = strstr(string, delimiter);
    if (end == NULL) {
        char *temp = string;
        string = NULL;
        return temp;
    }

    char *temp = string;

    *end = '\0';
    string = end + strlen(delimiter);
    return temp;
}