/*
*******************************************************************************
*
* Copyright (C) 2004-2008, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: ubidi_props.h
* encoding: US-ASCII
* tab size: 8 (not used)
* indentation:4
*
* created on: 2004dec30
* created by: Markus W. Scherer
*
* Low-level Unicode bidi/shaping properties access.
*/
#ifndef __UBIDI_PROPS_H__
#define __UBIDI_PROPS_H__
#include "unicode/utypes.h"
#include "unicode/uset.h"
#include "uset_imp.h"
#include "udataswp.h"
#define UBIDI_HARDCODE_DATA 1
U_CDECL_BEGIN
/* library API -------------------------------------------------------------- */
struct UBiDiProps;
typedef struct UBiDiProps UBiDiProps;
U_CFUNC UBiDiProps *
ubidi_openProps(UErrorCode *pErrorCode);
U_CFUNC UBiDiProps *
ubidi_openBinary(const uint8_t *bin, int32_t length, UErrorCode *pErrorCode);
U_CFUNC void
ubidi_closeProps(UBiDiProps *bdp);
U_CFUNC const UBiDiProps *
ubidi_getSingleton(UErrorCode *pErrorCode);
#if !UBIDI_HARDCODE_DATA
/**
* Get a singleton dummy object, one that works with no real data.
* This can be used when the real data is not available.
* Using the dummy can reduce checks for available data after an initial failure.
*/
U_CAPI const UBiDiProps *
ubidi_getDummy(UErrorCode *pErrorCode);
#endif
U_CAPI int32_t
ubidi_swap(const UDataSwapper *ds,
const void *inData, int32_t length, void *outData,
UErrorCode *pErrorCode);
U_CFUNC void
ubidi_addPropertyStarts(const UBiDiProps *bdp, const USetAdder *sa, UErrorCode *pErrorCode);
/* property access functions */
U_CFUNC int32_t
ubidi_getMaxValue(const UBiDiProps *bdp, UProperty which);
U_CAPI UCharDirection
ubidi_getClass(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBool
ubidi_isMirrored(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UChar32
ubidi_getMirror(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBool
ubidi_isBidiControl(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UBool
ubidi_isJoinControl(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UJoiningType
ubidi_getJoiningType(const UBiDiProps *bdp, UChar32 c);
U_CFUNC UJoiningGroup
ubidi_getJoiningGroup(const UBiDiProps *bdp, UChar32 c);
/* file definitions --------------------------------------------------------- */
#define UBIDI_DATA_NAME "ubidi"
#define UBIDI_DATA_TYPE "icu"
/* format "BiDi" */
#define UBIDI_FMT_0 0x42
#define UBIDI_FMT_1 0x69
#define UBIDI_FMT_2 0x44
#define UBIDI_FMT_3 0x69
/* indexes into indexes[] */
enum {
UBIDI_IX_INDEX_TOP,
UBIDI_IX_LENGTH,
UBIDI_IX_TRIE_SIZE,
UBIDI_IX_MIRROR_LENGTH,
UBIDI_IX_JG_START,
UBIDI_IX_JG_LIMIT,
UBIDI_MAX_VALUES_INDEX=15,
UBIDI_IX_TOP=16
};
/* definitions for 16-bit bidi/shaping properties word ---------------------- */
enum {
/* UBIDI_CLASS_SHIFT=0, */ /* bidi class: 5 bits (4..0) */
UBIDI_JT_SHIFT=5, /* joining type: 3 bits (7..5) */
/* UBIDI__SHIFT=8, reserved: 2 bits (9..8) */
UBIDI_JOIN_CONTROL_SHIFT=10,
UBIDI_BIDI_CONTROL_SHIFT=11,
UBIDI_IS_MIRRORED_SHIFT=12, /* 'is mirrored' */
UBIDI_MIRROR_DELTA_SHIFT=13, /* bidi mirroring delta: 3 bits (15..13) */
UBIDI_MAX_JG_SHIFT=16 /* max JG value in indexes[UBIDI_MAX_VALUES_INDEX] bits 23..16 */
};
#define UBIDI_CLASS_MASK 0x0000001f
#define UBIDI_JT_MASK 0x000000e0
#define UBIDI_MAX_JG_MASK 0x00ff0000
#define UBIDI_GET_CLASS(props) ((props)&UBIDI_CLASS_MASK)
#define UBIDI_GET_FLAG(props, shift) (((props)>>(shift))&1)
enum {
UBIDI_ESC_MIRROR_DELTA=-4,
UBIDI_MIN_MIRROR_DELTA=-3,
UBIDI_MAX_MIRROR_DELTA=3
};
/* definitions for 32-bit mirror table entry -------------------------------- */
enum {
/* the source Unicode code point takes 21 bits (20..0) */
UBIDI_MIRROR_INDEX_SHIFT=21,
UBIDI_MAX_MIRROR_INDEX=0x7ff
};
#define UBIDI_GET_MIRROR_CODE_POINT(m) (UChar32)((m)&0x1fffff)
#define UBIDI_GET_MIRROR_INDEX(m) ((m)>>UBIDI_MIRROR_INDEX_SHIFT)
U_CDECL_END
#endif