C: Parse empty tokens from a string with strtok

Question

My application produces strings like the one below. I need to parse values between the separator into individual values.

2342|2sd45|dswer|2342||5523|||3654|         


        

Answer 1

Inspired by Patrick Schlüter answer I made this function, it is supposed to be thread safe and support empty tokens and doesn't change the original string

char* strTok(char** newString, char* delimiter)
{
    char* string = *newString;
    char* delimiterFound = (char*) 0;
    int tokLenght = 0;
    char* tok = (char*) 0;

    if(!string) return (char*) 0;

    delimiterFound = strstr(string, delimiter);

    if(delimiterFound){
        tokLenght = delimiterFound-string;
    }else{
        tokLenght = strlen(string);
    }

    tok = malloc(tokLenght + 1);
    memcpy(tok, string, tokLenght);
    tok[tokLenght] = '\0';

    *newString = delimiterFound ? delimiterFound + strlen(delimiter) : (char*)0;

    return tok;
}

you can use it like

char* input = "1,2,3,,5,";
char** inputP = &input;
char* tok;
while( (tok=strTok(inputP, ",")) ){
    printf("%s\n", tok);
}

This suppose to output

1
2
3

5

I tested it for simple strings but didn't use it in production yet, and posted it on code review too, so you can see what do others think about it