What is the fastest way to copy a portion of a string

Projects Programming
1

So Im am recieving this data from a client. I have already got the important part and saved it into a string.

GET /favicon.ico HTTP/1.1

I would like to parse this string by white spaces, I am not sure if my method is most effecient.

String textToParse = "GET /favicon.ico HTTP/1.1"

char * duplicate = strdup(requestData.c_str());   //have to covert the string to a char* so that i can use strok
char * pch;
Serial.print("\nSplitting string to tokens:");
Serial.println(requestData);

pch = strtok (duplicate," ");
Serial.println (pch);
pch = strtok (NULL, " ");
Serial.println (pch);
pch = strtok (NULL, " ");
Serial.println (pch);

Splitting string to tokens:GET /favicon.ico HTTP/1.1

GET
/favicon.ico
HTTP/1.1

Can this be further be optimized?

I do it this way because from what i have read HTTP request (GET,POST,DELETE, Etc.) do not have sapces in then and for the second part, URLs also cannot conatiain spaces in them. So i assume it is safe to use the 'space' character as an indicator to split

2

not sure what you want to do with the sub-strings.
consider the following

        int   N;
        char *t = s;
        char *toks [MAX_TOK];

        for (N = 0; NULL != (toks [N] = strtok (t, " ")); N++)  {
            t        = NULL;
        }
3

Does it NEED to be further optimized? strtok() is pretty fast (much faster than Serial.println(), for example.)

4

one optimization I see is to use a char* for a reading buffer instead of the String.
at least this would spare the line to convert the String to a char* duplicate ...
but strtok() is ok.

5

I would like to save it into a variable (either a string or char* [])for it to be compared later on

That is the thing i dont knnow if the code is already on the effecient side of the spectrum. if strok() is already on efficient side of things then im fine with it.

6

that's what the code i posted does