ubrk.h

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      * hard separator (CR, LF, PS, etc.)
      */
    UBRK_SENTENCE_TERM       = 0,
    /** Upper bound for tags for sentences ended by sentence terminators.    */
    UBRK_SENTENCE_TERM_LIMIT = 100,
    /** Tag value for for sentences that do not contain an ending
      * sentence terminator ('.', '?', '!', etc.) character, but 
      * are ended only by a hard separator (CR, LF, PS, etc.) or end of input.
      */
    UBRK_SENTENCE_SEP        = 100,
    /** Upper bound for tags for sentences ended by a separator.              */
    UBRK_SENTENCE_SEP_LIMIT  = 200
    /** Tag value for a hard, or mandatory line break  */
} USentenceBreakTag;


/**
 * Open a new UBreakIterator for locating text boundaries for a specified locale.
 * A UBreakIterator may be used for detecting character, line, word,
 * and sentence breaks in text.
 * @param type The type of UBreakIterator to open: one of UBRK_CHARACTER, UBRK_WORD,
 * UBRK_LINE, UBRK_SENTENCE
 * @param locale The locale specifying the text-breaking conventions.
 * @param text The text to be iterated over.
 * @param textLength The number of characters in text, or -1 if null-terminated.
 * @param status A UErrorCode to receive any errors.
 * @return A UBreakIterator for the specified locale.
 * @see ubrk_openRules
 * @stable ICU 2.0
 */
U_STABLE UBreakIterator* U_EXPORT2
ubrk_open(UBreakIteratorType type,
      const char *locale,
      const UChar *text,
      int32_t textLength,
      UErrorCode *status);

/**
 * Open a new UBreakIterator for locating text boundaries using specified breaking rules.
 * The rule syntax is ... (TBD)
 * @param rules A set of rules specifying the text breaking conventions.
 * @param rulesLength The number of characters in rules, or -1 if null-terminated.
 * @param text The text to be iterated over.  May be null, in which case ubrk_setText() is
 *        used to specify the text to be iterated.
 * @param textLength The number of characters in text, or -1 if null-terminated.
 * @param parseErr   Receives position and context information for any syntax errors
 *                   detected while parsing the rules.
 * @param status A UErrorCode to receive any errors.
 * @return A UBreakIterator for the specified rules.
 * @see ubrk_open
 * @stable ICU 2.2
 */
U_STABLE UBreakIterator* U_EXPORT2
ubrk_openRules(const UChar     *rules,
               int32_t         rulesLength,
               const UChar     *text,
               int32_t          textLength,
               UParseError     *parseErr,
               UErrorCode      *status);

/**
 * Thread safe cloning operation
 * @param bi iterator to be cloned
 * @param stackBuffer user allocated space for the new clone. If NULL new memory will be allocated.
 *  If buffer is not large enough, new memory will be allocated.
 *  Clients can use the U_BRK_SAFECLONE_BUFFERSIZE. This will probably be enough to avoid memory allocations.
 * @param pBufferSize pointer to size of allocated space.
 *  If *pBufferSize == 0, a sufficient size for use in cloning will
 *  be returned ('pre-flighting')
 *  If *pBufferSize is not enough for a stack-based safe clone,
 *  new memory will be allocated.
 * @param status to indicate whether the operation went on smoothly or there were errors
 *  An informational status value, U_SAFECLONE_ALLOCATED_ERROR, is used if any allocations were necessary.
 * @return pointer to the new clone
 * @stable ICU 2.0
 */
U_STABLE UBreakIterator * U_EXPORT2
ubrk_safeClone(
          const UBreakIterator *bi,
          void *stackBuffer,
          int32_t *pBufferSize,
          UErrorCode *status);

/**
  * A recommended size (in bytes) for the memory buffer to be passed to ubrk_saveClone().
  * @stable ICU 2.0
  */
#define U_BRK_SAFECLONE_BUFFERSIZE 512

/**
* Close a UBreakIterator.
* Once closed, a UBreakIterator may no longer be used.
* @param bi The break iterator to close.
 * @stable ICU 2.0
*/
U_STABLE void U_EXPORT2
ubrk_close(UBreakIterator *bi);

/**
 * Sets an existing iterator to point to a new piece of text
 * @param bi The iterator to use
 * @param text The text to be set
 * @param textLength The length of the text
 * @param status The error code
 * @stable ICU 2.0
 */
U_STABLE void U_EXPORT2
ubrk_setText(UBreakIterator* bi,
             const UChar*    text,
             int32_t         textLength,
             UErrorCode*     status);

/**
 * Determine the most recently-returned text boundary.
 *
 * @param bi The break iterator to use.
 * @return The character index most recently returned by \ref ubrk_next, \ref ubrk_previous,
 * \ref ubrk_first, or \ref ubrk_last.
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_current(const UBreakIterator *bi);

/**
 * Determine the text boundary following the current text boundary.
 *
 * @param bi The break iterator to use.
 * @return The character index of the next text boundary, or UBRK_DONE
 * if all text boundaries have been returned.
 * @see ubrk_previous
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_next(UBreakIterator *bi);

/**
 * Determine the text boundary preceding the current text boundary.
 *
 * @param bi The break iterator to use.
 * @return The character index of the preceding text boundary, or UBRK_DONE
 * if all text boundaries have been returned.
 * @see ubrk_next
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_previous(UBreakIterator *bi);

/**
 * Determine the index of the first character in the text being scanned.
 * This is not always the same as index 0 of the text.
 * @param bi The break iterator to use.
 * @return The character index of the first character in the text being scanned.
 * @see ubrk_last
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_first(UBreakIterator *bi);

/**
 * Determine the index immediately <EM>beyond</EM> the last character in the text being
 * scanned.
 * This is not the same as the last character.
 * @param bi The break iterator to use.
 * @return The character offset immediately <EM>beyond</EM> the last character in the
 * text being scanned.
 * @see ubrk_first
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_last(UBreakIterator *bi);

/**
 * Determine the text boundary preceding the specified offset.
 * The value returned is always smaller than offset, or UBRK_DONE.
 * @param bi The break iterator to use.
 * @param offset The offset to begin scanning.
 * @return The text boundary preceding offset, or UBRK_DONE.
 * @see ubrk_following
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_preceding(UBreakIterator *bi,
           int32_t offset);

/**
 * Determine the text boundary following the specified offset.
 * The value returned is always greater than offset, or UBRK_DONE.
 * @param bi The break iterator to use.
 * @param offset The offset to begin scanning.
 * @return The text boundary following offset, or UBRK_DONE.
 * @see ubrk_preceding
 * @stable ICU 2.0
 */
U_STABLE int32_t U_EXPORT2
ubrk_following(UBreakIterator *bi,
           int32_t offset);

/**
* Get a locale for which text breaking information is available.
* A UBreakIterator in a locale returned by this function will perform the correct
* text breaking for the locale.
* @param index The index of the desired locale.
* @return A locale for which number text breaking information is available, or 0 if none.
* @see ubrk_countAvailable
* @stable ICU 2.0
*/
U_STABLE const char* U_EXPORT2
ubrk_getAvailable(int32_t index);

/**
* Determine how many locales have text breaking information available.
* This function is most useful as determining the loop ending condition for
* calls to \ref ubrk_getAvailable.
* @return The number of locales for which text breaking information is available.
* @see ubrk_getAvailable
* @stable ICU 2.0
*/
U_STABLE int32_t U_EXPORT2
ubrk_countAvailable(void);


/**
* Returns true if the specfied position is a boundary position.  As a side
* effect, leaves the iterator pointing to the first boundary position at
* or after "offset".
* @param bi The break iterator to use.
* @param offset the offset to check.
* @return True if "offset" is a boundary position.
* @stable ICU 2.0
*/
U_STABLE  UBool U_EXPORT2
ubrk_isBoundary(UBreakIterator *bi, int32_t offset);

/**
 * Return the status from the break rule that determined the most recently
 * returned break position.  The values appear in the rule source
 * within brackets, {123}, for example.  For rules that do not specify a
 * status, a default value of 0 is returned.
 * <p>
 * For word break iterators, the possible values are defined in enum UWordBreak.
 * @stable ICU 2.2
 */
U_STABLE  int32_t U_EXPORT2
ubrk_getRuleStatus(UBreakIterator *bi);

/**
 * Get the statuses from the break rules that determined the most recently
 * returned break position.  The values appear in the rule source
 * within brackets, {123}, for example.  The default status value for rules
 * that do not explicitly provide one is zero.
 * <p>
 * For word break iterators, the possible values are defined in enum UWordBreak.
 * @param bi        The break iterator to use
 * @param fillInVec an array to be filled in with the status values.  
 * @param capacity  the length of the supplied vector.  A length of zero causes
 *                  the function to return the number of status values, in the
 *                  normal way, without attemtping to store any values.
 * @param status    receives error codes.  
 * @return          The number of rule status values from rules that determined 
 *                  the most recent boundary returned by the break iterator.
 * @draft ICU 3.0
 */
U_DRAFT  int32_t U_EXPORT2
ubrk_getRuleStatusVec(UBreakIterator *bi, int32_t *fillInVec, int32_t capacity, UErrorCode *status);

/**
 * Return the locale of the break iterator. You can choose between the valid and
 * the actual locale.
 * @param bi break iterator
 * @param type locale type (valid or actual)
 * @param status error code
 * @return locale string
 * @draft ICU 2.8 likely to change in ICU 3.0, based on feedback
 */
U_DRAFT const char* U_EXPORT2
ubrk_getLocaleByType(const UBreakIterator *bi, ULocDataLocaleType type, UErrorCode* status);


#endif /* #if !UCONFIG_NO_BREAK_ITERATION */

#endif