Menu
I have a const char* variable which may have a value like "OpenStack:OpenStack1". I want to tokenize this const char* using strtok where the delimiter(which is of a const char* type) is ":" . But the problem is strtok is of following type: char * strtok ( char * str, const char * delimiters );
Which means I can't use const char* for the first input as it has to be char*. Could you say me how I can convert this const char* into char*?
Thank you.
516
The strtok() function parses the string up to the first instance of the delimiter character, replaces the character in place with a null byte ( '\0' ), and returns the address of the first character in the token. Subsequent calls to strtok() begin parsing immediately after the most recently placed null character.
Return Value The first time the strtok() function is called, it returns a pointer to the first token in string1. In later calls with the same token string, the strtok() function returns a pointer to the next token in the string. A NULL pointer is returned when there are no more tokens. All tokens are null-ended.
strtok() returns a NULL pointer. The token ends with the first character contained in the string pointed to by string2. If such a character is not found, the token ends at the terminating NULL character.
Since strtok actually writes to your string, you need to make a writable copy of it to tokenize;
char* copy = strdup(myReadonlyString);
...tokenize copy...
free(copy);
Declare it as an array:
char tokenedStr[] = "OpenStack:OpenStack1";
if not possible, copy it to a char array.
43
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
