Is there a built in function to get the back half of a strsep()?

Question

In short, currently the code below outputs: The substring is AES . Unfortunately, I'm looking to get the result The substring is 100 . This is due to the fact that strsep() keeps only the first portion of the split, and not the second. Is there a way to make the 2nd portion the one that's kept instead?

#include <stdio.h>
#include <string.h>

int main () {
   const char haystack[50] = "SHA1 = 99\nAES = 100";
   const char needle[10] = "Point";
   char *ret;
   char *bonus;
   ret = strstr(haystack, "AES");

   bonus = strsep(&ret, "=");

   printf("The substring is: %s\n", bonus);

   return(0);
}

Answer 1

From strsep function's documentation :

 char *strsep(char **stringp, const char *delim);

If *stringp is NULL, the strsep() function returns NULL and does nothing else. Otherwise, this function finds the first token in the string *stringp , that is delimited by one of the bytes in the string delim . This token is terminated by overwriting the delimiter with a null byte ( '\0' ), and *stringp is updated to point past the token . In case no delimiter was found, the token is taken to be the entire string *stringp , and *stringp is made NULL .

So in your program's case you should print ret instead of bonus :

bonus = strsep(&ret, "=");

printf("The substring is: %s\n", ret);

Since ret will point past the token "=" .