#ifndef SASS_UTF8_STRING_H

#define SASS_UTF8_STRING_H

#include <string>

#include "utf8.h"

namespace Sass {

  namespace UTF_8 {

    // naming conventions:

    // offset: raw byte offset (0 based)

    // position: code point offset (0 based)

    // index: code point offset (1 based or negative)

    // function that will count the number of code points (utf-8 characters) from the beginning to the given end

    size_t code_point_count(const std::string& str, size_t start, size_t end);

    size_t code_point_count(const std::string& str);

    // function that will return the byte offset of a code point in a

    size_t offset_at_position(const std::string& str, size_t position);

    // function that returns number of bytes in a character in a string

    size_t code_point_size_at_offset(const std::string& str, size_t offset);

    // function that will return a normalized index, given a crazy one

    size_t normalize_index(int index, size_t len);

    #ifdef _WIN32

    // functions to handle unicode paths on windows

    std::string convert_from_utf16(const std::wstring& wstr);

    std::wstring convert_to_utf16(const std::string& str);

    #endif

  }

}

#endif