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

/**
 * Demonstration of how to use strtok_r
 */
void
split(char *str)
{
  char *s, *outerptr;

  for (s = str; ; s = NULL) {
    char *next = strtok_r(s, "&", &outerptr);
    if (next == NULL)
      break;

    char *innerptr;
    char *key = strtok_r(next, "=", &innerptr);
    char *value = strtok_r(NULL, "=", &innerptr);
    printf("Key: %-20s Value: %-20s\n", key, value);
  }
}

int main()
{
  char a[] = "a=b&callback=jsonp1258749550540&c=d";
  split(a);
  return 0;
}