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

#define TOKEN_SPLIT ','

char * mystrtok(char * string, char token)
{
    static char * lastp;

    if (string!=NULL)
    {
	lastp=string;
    }
    else
    {
	if (lastp==NULL)
	    return NULL;	
	lastp++;
    }
    char *holdp=lastp;
    char *nptr = lastp;
    while (*nptr!=token && *nptr!='\0')
    {
	nptr++;
    }
    if (*nptr=='\0')
    {
	lastp=NULL;
    }
    else
    {
	lastp=nptr;
	*nptr='\0';
    }
    return holdp;
}

int main(void)
{
  char string[50] ="Test,string1,Test,string2:Test:string3";
  char *p;
  printf ("String  \"%s\" is split into tokens using a single char in \"%c\":\n",string, TOKEN_SPLIT);
  p = mystrtok (string,TOKEN_SPLIT); // get first token
  printf ("%s\n",p);
  while (NULL != (p = mystrtok (NULL, TOKEN_SPLIT)))  // get subsequent tokens  -- NOTE USE OF NULL -- cannot split two string at same time
  {
      printf ("%s\n",p);
  }
}