Method indexOf

classpath/java/util/regex/TrivialPattern.java:95–111

(CharSequence haystack, CharSequence needle, int start)

  }

  static int indexOf(CharSequence haystack, CharSequence needle, int start) {
    if (needle.length() == 0) return start;

    for (int i = start; i < haystack.length() - needle.length() + 1; ++i) {
      int j = 0;
      for (; j < needle.length(); ++j) {
        if (haystack.charAt(i + j) != needle.charAt(j)) {
          break;
        }
      }
      if (j == needle.length()) {
        return i;
      }
    }

    return -1;
  }
}