CODEWITHSUNDEEP
c++stringparsingarduino
fwouxicd
fwouxicd

Reputation: 33

Split string by delimiter strtok weird behaviour

I am trying to split string ,but unfortunately strtok behaves weirdly

I have following string get|user=password|23|info|hello I have tried widely used method using strtok, but unfortunately it treats = as delimiter and I cannot parse my string. So get parsed correctly than parsed only user, but not user=password.

Please help to find the problem or suggest any other way to split the string. I am programming for Arduino.

Thanks

Code 

  const char delimeter = '|';
  char *token;
  token = strtok(requestString, &delimeter);
  // Handle parsed  
  token = strtok(NULL, &delimeter);

Upvotes: 3

Views: 518

Answers (2)

Anon Mail
Anon Mail

Reputation: 4770

Change this:

  const char delimeter = '|';

to this:

  const char * delimeter = "|";  // note the double quotes

Upvotes: 2

Rostislav
Rostislav

Reputation: 3977

From cppreference,

delim - pointer to the null-terminated byte string identifying delimiters

The requirement that your approach doesn't fit is null terminated. You take the address of a single char, but clearly you cannot access anything past this one symbol. strtok, however, searches for \0 character which terminates the string. Thus you're entering undefined behaviour land.

Instead, use

const char* delimiter = "|";

Upvotes: 4

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