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

#include "stringex.h"

bool str_begin (const char *a, const char *b) {
  return strncmp(a, b, strlen(b)) == 0;
}

char* str_split (char *str) {
  char *res;
  char *pch;
  pch = strtok(str, " <>");
  while (pch != NULL) {
    if (str_begin(pch, "href=")) {
      char *pch2;
      pch2 = strtok(pch, "=\"'");

      while (pch2 != NULL) {
        if (pch2 != "href") {
          res = pch2;
        }
        pch2 = strtok(NULL, "=\"'");
      }
    }
    pch = strtok(NULL, " <>");
  }

  return(res);
}