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ubidi.h
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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
*
* Copyright (C) 1999-2013, International Business Machines
* Corporation and others. All Rights Reserved.
*
******************************************************************************
* file name: ubidi.h
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 1999jul27
* created by: Markus W. Scherer, updated by Matitiahu Allouche
*/
#ifndef UBIDI_H
#define UBIDI_H
#include "unicode/utypes.h"
#include "unicode/uchar.h"
#if U_SHOW_CPLUSPLUS_API
#include "unicode/localpointer.h"
#endif // U_SHOW_CPLUSPLUS_API
/*DOCXX_TAG*/
typedef uint8_t UBiDiLevel;
#define UBIDI_DEFAULT_LTR 0xfe
#define UBIDI_DEFAULT_RTL 0xff
#define UBIDI_MAX_EXPLICIT_LEVEL 125
#define UBIDI_LEVEL_OVERRIDE 0x80
#define UBIDI_MAP_NOWHERE (-1)
enum UBiDiDirection {
UBIDI_LTR,
UBIDI_RTL,
UBIDI_MIXED,
UBIDI_NEUTRAL
};
typedef enum UBiDiDirection UBiDiDirection;
struct UBiDi;
typedef struct UBiDi UBiDi;
U_CAPI UBiDi * U_EXPORT2
ubidi_open(void);
U_CAPI UBiDi * U_EXPORT2
ubidi_openSized(int32_t maxLength, int32_t maxRunCount, UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_close(UBiDi *pBiDi);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
U_DEFINE_LOCAL_OPEN_POINTER(LocalUBiDiPointer, UBiDi, ubidi_close);
U_NAMESPACE_END
#endif
U_CAPI void U_EXPORT2
ubidi_setInverse(UBiDi *pBiDi, UBool isInverse);
U_CAPI UBool U_EXPORT2
ubidi_isInverse(UBiDi *pBiDi);
U_CAPI void U_EXPORT2
ubidi_orderParagraphsLTR(UBiDi *pBiDi, UBool orderParagraphsLTR);
U_CAPI UBool U_EXPORT2
ubidi_isOrderParagraphsLTR(UBiDi *pBiDi);
typedef enum UBiDiReorderingMode {
UBIDI_REORDER_DEFAULT = 0,
UBIDI_REORDER_NUMBERS_SPECIAL,
UBIDI_REORDER_GROUP_NUMBERS_WITH_R,
UBIDI_REORDER_RUNS_ONLY,
UBIDI_REORDER_INVERSE_NUMBERS_AS_L,
UBIDI_REORDER_INVERSE_LIKE_DIRECT,
UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL,
#ifndef U_HIDE_DEPRECATED_API
UBIDI_REORDER_COUNT
#endif // U_HIDE_DEPRECATED_API
} UBiDiReorderingMode;
U_CAPI void U_EXPORT2
ubidi_setReorderingMode(UBiDi *pBiDi, UBiDiReorderingMode reorderingMode);
U_CAPI UBiDiReorderingMode U_EXPORT2
ubidi_getReorderingMode(UBiDi *pBiDi);
typedef enum UBiDiReorderingOption {
UBIDI_OPTION_DEFAULT = 0,
UBIDI_OPTION_INSERT_MARKS = 1,
UBIDI_OPTION_REMOVE_CONTROLS = 2,
UBIDI_OPTION_STREAMING = 4
} UBiDiReorderingOption;
U_CAPI void U_EXPORT2
ubidi_setReorderingOptions(UBiDi *pBiDi, uint32_t reorderingOptions);
U_CAPI uint32_t U_EXPORT2
ubidi_getReorderingOptions(UBiDi *pBiDi);
U_CAPI void U_EXPORT2
ubidi_setContext(UBiDi *pBiDi,
const UChar *prologue, int32_t proLength,
const UChar *epilogue, int32_t epiLength,
UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_setPara(UBiDi *pBiDi, const UChar *text, int32_t length,
UBiDiLevel paraLevel, UBiDiLevel *embeddingLevels,
UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_setLine(const UBiDi *pParaBiDi,
int32_t start, int32_t limit,
UBiDi *pLineBiDi,
UErrorCode *pErrorCode);
U_CAPI UBiDiDirection U_EXPORT2
ubidi_getDirection(const UBiDi *pBiDi);
U_CAPI UBiDiDirection U_EXPORT2
ubidi_getBaseDirection(const UChar *text, int32_t length );
U_CAPI const UChar * U_EXPORT2
ubidi_getText(const UBiDi *pBiDi);
U_CAPI int32_t U_EXPORT2
ubidi_getLength(const UBiDi *pBiDi);
U_CAPI UBiDiLevel U_EXPORT2
ubidi_getParaLevel(const UBiDi *pBiDi);
U_CAPI int32_t U_EXPORT2
ubidi_countParagraphs(UBiDi *pBiDi);
U_CAPI int32_t U_EXPORT2
ubidi_getParagraph(const UBiDi *pBiDi, int32_t charIndex, int32_t *pParaStart,
int32_t *pParaLimit, UBiDiLevel *pParaLevel,
UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_getParagraphByIndex(const UBiDi *pBiDi, int32_t paraIndex,
int32_t *pParaStart, int32_t *pParaLimit,
UBiDiLevel *pParaLevel, UErrorCode *pErrorCode);
U_CAPI UBiDiLevel U_EXPORT2
ubidi_getLevelAt(const UBiDi *pBiDi, int32_t charIndex);
U_CAPI const UBiDiLevel * U_EXPORT2
ubidi_getLevels(UBiDi *pBiDi, UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_getLogicalRun(const UBiDi *pBiDi, int32_t logicalPosition,
int32_t *pLogicalLimit, UBiDiLevel *pLevel);
U_CAPI int32_t U_EXPORT2
ubidi_countRuns(UBiDi *pBiDi, UErrorCode *pErrorCode);
U_CAPI UBiDiDirection U_EXPORT2
ubidi_getVisualRun(UBiDi *pBiDi, int32_t runIndex,
int32_t *pLogicalStart, int32_t *pLength);
U_CAPI int32_t U_EXPORT2
ubidi_getVisualIndex(UBiDi *pBiDi, int32_t logicalIndex, UErrorCode *pErrorCode);
U_CAPI int32_t U_EXPORT2
ubidi_getLogicalIndex(UBiDi *pBiDi, int32_t visualIndex, UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_getLogicalMap(UBiDi *pBiDi, int32_t *indexMap, UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_getVisualMap(UBiDi *pBiDi, int32_t *indexMap, UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_reorderLogical(const UBiDiLevel *levels, int32_t length, int32_t *indexMap);
U_CAPI void U_EXPORT2
ubidi_reorderVisual(const UBiDiLevel *levels, int32_t length, int32_t *indexMap);
U_CAPI void U_EXPORT2
ubidi_invertMap(const int32_t *srcMap, int32_t *destMap, int32_t length);
#define UBIDI_KEEP_BASE_COMBINING 1
#define UBIDI_DO_MIRRORING 2
#define UBIDI_INSERT_LRM_FOR_NUMERIC 4
#define UBIDI_REMOVE_BIDI_CONTROLS 8
#define UBIDI_OUTPUT_REVERSE 16
U_CAPI int32_t U_EXPORT2
ubidi_getProcessedLength(const UBiDi *pBiDi);
U_CAPI int32_t U_EXPORT2
ubidi_getResultLength(const UBiDi *pBiDi);
U_CDECL_BEGIN
#ifndef U_HIDE_DEPRECATED_API
#define U_BIDI_CLASS_DEFAULT U_CHAR_DIRECTION_COUNT
#endif // U_HIDE_DEPRECATED_API
typedef UCharDirection U_CALLCONV
UBiDiClassCallback(const void *context, UChar32 c);
U_CDECL_END
U_CAPI UCharDirection U_EXPORT2
ubidi_getCustomizedClass(UBiDi *pBiDi, UChar32 c);
U_CAPI void U_EXPORT2
ubidi_setClassCallback(UBiDi *pBiDi, UBiDiClassCallback *newFn,
const void *newContext, UBiDiClassCallback **oldFn,
const void **oldContext, UErrorCode *pErrorCode);
U_CAPI void U_EXPORT2
ubidi_getClassCallback(UBiDi *pBiDi, UBiDiClassCallback **fn, const void **context);
U_CAPI int32_t U_EXPORT2
ubidi_writeReordered(UBiDi *pBiDi,
UChar *dest, int32_t destSize,
uint16_t options,
UErrorCode *pErrorCode);
U_CAPI int32_t U_EXPORT2
ubidi_writeReverse(const UChar *src, int32_t srcLength,
UChar *dest, int32_t destSize,
uint16_t options,
UErrorCode *pErrorCode);
/*#define BIDI_SAMPLE_CODE*/
#endif
LocalUBiDiPointer
"Smart pointer" class, closes a UBiDi via ubidi_close().
localpointer.h
C++ API: "Smart pointers" for use with and in ICU4C C++ code.
U_DEFINE_LOCAL_OPEN_POINTER
#define U_DEFINE_LOCAL_OPEN_POINTER(LocalPointerClassName, Type, closeFunction)
"Smart pointer" definition macro, deletes objects via the closeFunction.
Definition localpointer.h:548
U_CALLCONV
#define U_CALLCONV
Similar to U_CDECL_BEGIN/U_CDECL_END, this qualifier is necessary in callback function typedefs to ma...
Definition platform.h:836
ubidi_getLogicalRun
U_CAPI void ubidi_getLogicalRun(const UBiDi *pBiDi, int32_t logicalPosition, int32_t *pLogicalLimit, UBiDiLevel *pLevel)
Get a logical run.
ubidi_countParagraphs
U_CAPI int32_t ubidi_countParagraphs(UBiDi *pBiDi)
Get the number of paragraphs.
ubidi_countRuns
U_CAPI int32_t ubidi_countRuns(UBiDi *pBiDi, UErrorCode *pErrorCode)
Get the number of runs.
ubidi_reorderVisual
U_CAPI void ubidi_reorderVisual(const UBiDiLevel *levels, int32_t length, int32_t *indexMap)
This is a convenience function that does not use a UBiDi object.
ubidi_getLength
U_CAPI int32_t ubidi_getLength(const UBiDi *pBiDi)
Get the length of the text.
ubidi_getText
U_CAPI const UChar * ubidi_getText(const UBiDi *pBiDi)
Get the pointer to the text.
ubidi_getCustomizedClass
U_CAPI UCharDirection ubidi_getCustomizedClass(UBiDi *pBiDi, UChar32 c)
Retrieve the Bidi class for a given code point.
UBiDiReorderingOption
UBiDiReorderingOption
UBiDiReorderingOption values indicate which options are specified to affect the Bidi algorithm.
Definition ubidi.h:914
UBIDI_OPTION_INSERT_MARKS
@ UBIDI_OPTION_INSERT_MARKS
option bit for ubidi_setReorderingOptions: insert Bidi marks (LRM or RLM) when needed to ensure corre...
Definition ubidi.h:967
UBIDI_OPTION_STREAMING
@ UBIDI_OPTION_STREAMING
option bit for ubidi_setReorderingOptions: process the output as part of a stream to be continued
Definition ubidi.h:1033
UBIDI_OPTION_DEFAULT
@ UBIDI_OPTION_DEFAULT
option value for ubidi_setReorderingOptions: disable all the options which can be set with this funct...
Definition ubidi.h:921
UBIDI_OPTION_REMOVE_CONTROLS
@ UBIDI_OPTION_REMOVE_CONTROLS
option bit for ubidi_setReorderingOptions: remove Bidi control characters
Definition ubidi.h:985
ubidi_getProcessedLength
U_CAPI int32_t ubidi_getProcessedLength(const UBiDi *pBiDi)
Get the length of the source text processed by the last call to ubidi_setPara().
ubidi_getBaseDirection
U_CAPI UBiDiDirection ubidi_getBaseDirection(const UChar *text, int32_t length)
Gets the base direction of the text provided according to the Unicode Bidirectional Algorithm.
ubidi_setLine
U_CAPI void ubidi_setLine(const UBiDi *pParaBiDi, int32_t start, int32_t limit, UBiDi *pLineBiDi, UErrorCode *pErrorCode)
ubidi_setLine() sets a UBiDi to contain the reordering information, especially the resolved levels,...
ubidi_close
U_CAPI void ubidi_close(UBiDi *pBiDi)
ubidi_close() must be called to free the memory associated with a UBiDi object.
UBiDiDirection
UBiDiDirection
UBiDiDirection values indicate the text direction.
Definition ubidi.h:429
UBIDI_LTR
@ UBIDI_LTR
Left-to-right text.
Definition ubidi.h:441
UBIDI_NEUTRAL
@ UBIDI_NEUTRAL
No strongly directional text.
Definition ubidi.h:467
UBIDI_MIXED
@ UBIDI_MIXED
Mixed-directional text.
Definition ubidi.h:460
UBIDI_RTL
@ UBIDI_RTL
Right-to-left text.
Definition ubidi.h:453
ubidi_setClassCallback
U_CAPI void ubidi_setClassCallback(UBiDi *pBiDi, UBiDiClassCallback *newFn, const void *newContext, UBiDiClassCallback **oldFn, const void **oldContext, UErrorCode *pErrorCode)
Set the callback function and callback data used by the UBA implementation for Bidi class determinati...
ubidi_setReorderingOptions
U_CAPI void ubidi_setReorderingOptions(UBiDi *pBiDi, uint32_t reorderingOptions)
Specify which of the reordering options should be applied during Bidi transformations.
ubidi_writeReordered
U_CAPI int32_t ubidi_writeReordered(UBiDi *pBiDi, UChar *dest, int32_t destSize, uint16_t options, UErrorCode *pErrorCode)
Take a UBiDi object containing the reordering information for a piece of text (one or more paragraphs...
ubidi_writeReverse
U_CAPI int32_t ubidi_writeReverse(const UChar *src, int32_t srcLength, UChar *dest, int32_t destSize, uint16_t options, UErrorCode *pErrorCode)
Reverse a Right-To-Left run of Unicode text.
UBiDiClassCallback
UCharDirection UBiDiClassCallback(const void *context, UChar32 c)
Callback type declaration for overriding default Bidi class values with custom ones.
Definition ubidi.h:2016
ubidi_getParagraphByIndex
U_CAPI void ubidi_getParagraphByIndex(const UBiDi *pBiDi, int32_t paraIndex, int32_t *pParaStart, int32_t *pParaLimit, UBiDiLevel *pParaLevel, UErrorCode *pErrorCode)
Get a paragraph, given the index of this paragraph.
UBiDiReorderingMode
UBiDiReorderingMode
UBiDiReorderingMode values indicate which variant of the Bidi algorithm to use.
Definition ubidi.h:699
UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL
@ UBIDI_REORDER_INVERSE_FOR_NUMBERS_SPECIAL
Inverse Bidi (Visual to Logical) algorithm for the UBIDI_REORDER_NUMBERS_SPECIAL Bidi algorithm.
Definition ubidi.h:732
UBIDI_REORDER_GROUP_NUMBERS_WITH_R
@ UBIDI_REORDER_GROUP_NUMBERS_WITH_R
Logical to Visual algorithm grouping numbers with adjacent R characters (reversible algorithm).
Definition ubidi.h:711
UBIDI_REORDER_RUNS_ONLY
@ UBIDI_REORDER_RUNS_ONLY
Reorder runs only to transform a Logical LTR string to the Logical RTL string with the same display,...
Definition ubidi.h:719
UBIDI_REORDER_NUMBERS_SPECIAL
@ UBIDI_REORDER_NUMBERS_SPECIAL
Logical to Visual algorithm which handles numbers in a way which mimics the behavior of Windows XP.
Definition ubidi.h:707
UBIDI_REORDER_INVERSE_NUMBERS_AS_L
@ UBIDI_REORDER_INVERSE_NUMBERS_AS_L
Visual to Logical algorithm which handles numbers like L (same algorithm as selected by ubidi_setInve...
Definition ubidi.h:724
UBIDI_REORDER_INVERSE_LIKE_DIRECT
@ UBIDI_REORDER_INVERSE_LIKE_DIRECT
Visual to Logical algorithm equivalent to the regular Logical to Visual algorithm.
Definition ubidi.h:728
UBIDI_REORDER_DEFAULT
@ UBIDI_REORDER_DEFAULT
Regular Logical to Visual Bidi algorithm according to Unicode.
Definition ubidi.h:703
UBIDI_REORDER_COUNT
@ UBIDI_REORDER_COUNT
Number of values for reordering mode.
Definition ubidi.h:738
ubidi_openSized
U_CAPI UBiDi * ubidi_openSized(int32_t maxLength, int32_t maxRunCount, UErrorCode *pErrorCode)
Allocate a UBiDi structure with preallocated memory for internal structures.
ubidi_isInverse
U_CAPI UBool ubidi_isInverse(UBiDi *pBiDi)
Is this Bidi object set to perform the inverse Bidi algorithm?
ubidi_reorderLogical
U_CAPI void ubidi_reorderLogical(const UBiDiLevel *levels, int32_t length, int32_t *indexMap)
This is a convenience function that does not use a UBiDi object.
ubidi_setPara
U_CAPI void ubidi_setPara(UBiDi *pBiDi, const UChar *text, int32_t length, UBiDiLevel paraLevel, UBiDiLevel *embeddingLevels, UErrorCode *pErrorCode)
Perform the Unicode Bidi algorithm.
ubidi_getVisualMap
U_CAPI void ubidi_getVisualMap(UBiDi *pBiDi, int32_t *indexMap, UErrorCode *pErrorCode)
Get a visual-to-logical index map (array) for the characters in the UBiDi (paragraph or line) object.
ubidi_getParagraph
U_CAPI int32_t ubidi_getParagraph(const UBiDi *pBiDi, int32_t charIndex, int32_t *pParaStart, int32_t *pParaLimit, UBiDiLevel *pParaLevel, UErrorCode *pErrorCode)
Get a paragraph, given a position within the text.
ubidi_getReorderingOptions
U_CAPI uint32_t ubidi_getReorderingOptions(UBiDi *pBiDi)
What are the reordering options applied to a given Bidi object?
ubidi_getLevels
U_CAPI const UBiDiLevel * ubidi_getLevels(UBiDi *pBiDi, UErrorCode *pErrorCode)
Get an array of levels for each character.
ubidi_open
U_CAPI UBiDi * ubidi_open(void)
Allocate a UBiDi structure.
ubidi_getDirection
U_CAPI UBiDiDirection ubidi_getDirection(const UBiDi *pBiDi)
Get the directionality of the text.
ubidi_getClassCallback
U_CAPI void ubidi_getClassCallback(UBiDi *pBiDi, UBiDiClassCallback **fn, const void **context)
Get the current callback function used for Bidi class determination.
UBiDiLevel
uint8_t UBiDiLevel
UBiDiLevel is the type of the level values in this Bidi implementation.
Definition ubidi.h:340
ubidi_orderParagraphsLTR
U_CAPI void ubidi_orderParagraphsLTR(UBiDi *pBiDi, UBool orderParagraphsLTR)
Specify whether block separators must be allocated level zero, so that successive paragraphs will pro...
ubidi_getResultLength
U_CAPI int32_t ubidi_getResultLength(const UBiDi *pBiDi)
Get the length of the reordered text resulting from the last call to ubidi_setPara().
ubidi_setContext
U_CAPI void ubidi_setContext(UBiDi *pBiDi, const UChar *prologue, int32_t proLength, const UChar *epilogue, int32_t epiLength, UErrorCode *pErrorCode)
Set the context before a call to ubidi_setPara().
ubidi_getVisualIndex
U_CAPI int32_t ubidi_getVisualIndex(UBiDi *pBiDi, int32_t logicalIndex, UErrorCode *pErrorCode)
Get the visual position from a logical text position.
ubidi_getParaLevel
U_CAPI UBiDiLevel ubidi_getParaLevel(const UBiDi *pBiDi)
Get the paragraph level of the text.
ubidi_getLevelAt
U_CAPI UBiDiLevel ubidi_getLevelAt(const UBiDi *pBiDi, int32_t charIndex)
Get the level for one character.
ubidi_isOrderParagraphsLTR
U_CAPI UBool ubidi_isOrderParagraphsLTR(UBiDi *pBiDi)
Is this Bidi object set to allocate level 0 to block separators so that successive paragraphs progres...
ubidi_getLogicalIndex
U_CAPI int32_t ubidi_getLogicalIndex(UBiDi *pBiDi, int32_t visualIndex, UErrorCode *pErrorCode)
Get the logical text position from a visual position.
ubidi_invertMap
U_CAPI void ubidi_invertMap(const int32_t *srcMap, int32_t *destMap, int32_t length)
Invert an index map.
ubidi_setInverse
U_CAPI void ubidi_setInverse(UBiDi *pBiDi, UBool isInverse)
Modify the operation of the Bidi algorithm such that it approximates an "inverse Bidi" algorithm.
ubidi_getVisualRun
U_CAPI UBiDiDirection ubidi_getVisualRun(UBiDi *pBiDi, int32_t runIndex, int32_t *pLogicalStart, int32_t *pLength)
Get one run's logical start, length, and directionality, which can be 0 for LTR or 1 for RTL.
ubidi_getLogicalMap
U_CAPI void ubidi_getLogicalMap(UBiDi *pBiDi, int32_t *indexMap, UErrorCode *pErrorCode)
Get a logical-to-visual index map (array) for the characters in the UBiDi (paragraph or line) object.
UBiDi
struct UBiDi UBiDi
Definition ubidi.h:486
ubidi_getReorderingMode
U_CAPI UBiDiReorderingMode ubidi_getReorderingMode(UBiDi *pBiDi)
What is the requested reordering mode for a given Bidi object?
ubidi_setReorderingMode
U_CAPI void ubidi_setReorderingMode(UBiDi *pBiDi, UBiDiReorderingMode reorderingMode)
Modify the operation of the Bidi algorithm such that it implements some variant to the basic Bidi alg...
uchar.h
C API: Unicode Properties.
UCharDirection
UCharDirection
This specifies the language directional property of a character set.
Definition uchar.h:1023
UChar
char16_t UChar
The base type for UTF-16 code units and pointers.
Definition umachine.h:400
UChar32
int32_t UChar32
Define UChar32 as a type for single Unicode code points.
Definition umachine.h:449
U_CDECL_END
#define U_CDECL_END
This is used to end a declaration of a library private ICU C API.
Definition umachine.h:86
UBool
int8_t UBool
The ICU boolean type, a signed-byte integer.
Definition umachine.h:269
U_CAPI
#define U_CAPI
This is used to declare a function as a public ICU C API.
Definition umachine.h:110
U_CDECL_BEGIN
#define U_CDECL_BEGIN
This is used to begin a declaration of a library private ICU C API.
Definition umachine.h:85
utypes.h
Basic definitions for ICU, for both C and C++ APIs.
UErrorCode
UErrorCode
Standard ICU4C error code type, a substitute for exceptions.
Definition utypes.h:509