/** * Unicode Properties Vectors associated with code point ranges. * * Rows of uint32_t integers in a contiguous array store * the range limits and the properties vectors. * * Logically, each row has a certain number of uint32_t values, * which is set via the upvec_open() "columns" parameter. * * Internally, two additional columns are stored. * In each internal row, * row[0] contains the start code point and * row[1] contains the limit code point, * which is the start of the next range. * * Initially, there is only one "normal" row for * range [0..0x110000[ with values 0. * There are additional rows for special purposes, see UPVEC_FIRST_SPECIAL_CP. * * It would be possible to store only one range boundary per row, * but self-contained rows allow to later sort them by contents.
*/ struct UPropsVectors; typedefstruct UPropsVectors UPropsVectors;
/* * Special pseudo code points for storing the initialValue and the errorValue, * which are used to initialize a UTrie2 or similar.
*/ #define UPVEC_FIRST_SPECIAL_CP 0x110000 #define UPVEC_INITIAL_VALUE_CP 0x110000 #define UPVEC_ERROR_VALUE_CP 0x110001 #define UPVEC_MAX_CP 0x110001
/* * Special pseudo code point used in upvec_compact() signalling the end of * delivering special values and the beginning of delivering real ones. * Stable value, unlike UPVEC_MAX_CP which might grow over time.
*/ #define UPVEC_START_REAL_VALUES_CP 0x200000
/* * Open a UPropsVectors object. * @param columns Number of value integers (uint32_t) per row.
*/
U_CAPI UPropsVectors * U_EXPORT2
upvec_open(int32_t columns, UErrorCode *pErrorCode);
/* * In rows for code points [start..end], select the column, * reset the mask bits and set the value bits (ANDed with the mask). * * Will set U_NO_WRITE_PERMISSION if called after upvec_compact().
*/
U_CAPI void U_EXPORT2
upvec_setValue(UPropsVectors *pv,
UChar32 start, UChar32 end,
int32_t column,
uint32_t value, uint32_t mask,
UErrorCode *pErrorCode);
/* * Logically const but must not be used on the same pv concurrently! * Always returns 0 if called after upvec_compact().
*/
U_CAPI uint32_t U_EXPORT2
upvec_getValue(const UPropsVectors *pv, UChar32 c, int32_t column);
/* * pRangeStart and pRangeEnd can be NULL. * @return NULL if rowIndex out of range and for illegal arguments, * or if called after upvec_compact()
*/
U_CAPI uint32_t * U_EXPORT2
upvec_getRow(const UPropsVectors *pv, int32_t rowIndex,
UChar32 *pRangeStart, UChar32 *pRangeEnd);
/* * Compact the vectors: * - modify the memory * - keep only unique vectors * - store them contiguously from the beginning of the memory * - for each (non-unique) row, call the handler function * * The handler's rowIndex is the index of the row in the compacted * memory block. * (Therefore, it starts at 0 increases in increments of the columns value.) * * In a first phase, only special values are delivered (each exactly once), * with start==end both equalling a special pseudo code point. * Then the handler is called once more with start==end==UPVEC_START_REAL_VALUES_CP * where rowIndex is the length of the compacted array, * and the row is arbitrary (but not NULL). * Then, in the second phase, the handler is called for each row of real values.
*/ typedefvoid U_CALLCONV
UPVecCompactHandler(void *context,
UChar32 start, UChar32 end,
int32_t rowIndex, uint32_t *row, int32_t columns,
UErrorCode *pErrorCode);
/* * Get the vectors array after calling upvec_compact(). * The caller must not modify nor release the returned array. * Returns NULL if called before upvec_compact().
*/
U_CAPI const uint32_t * U_EXPORT2
upvec_getArray(const UPropsVectors *pv, int32_t *pRows, int32_t *pColumns);
/* * Get a clone of the vectors array after calling upvec_compact(). * The caller owns the returned array and must uprv_free() it. * Returns NULL if called before upvec_compact().
*/
U_CAPI uint32_t * U_EXPORT2
upvec_cloneArray(const UPropsVectors *pv,
int32_t *pRows, int32_t *pColumns, UErrorCode *pErrorCode);
/* * Call upvec_compact(), create a 16-bit UTrie2 with indexes into the compacted * vectors array, and freeze the trie.
*/
U_CAPI UTrie2 * U_EXPORT2
upvec_compactToUTrie2WithRowIndexes(UPropsVectors *pv, UErrorCode *pErrorCode);
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