ICU 59.1  59.1
Macros | Functions
ushape.h File Reference

C API: Arabic shaping. More...

#include "unicode/utypes.h"

Go to the source code of this file.

Macros

#define U_SHAPE_LENGTH_GROW_SHRINK   0
 Memory option: allow the result to have a different length than the source. More...
 
#define U_SHAPE_LAMALEF_RESIZE   0
 Memory option: allow the result to have a different length than the source. More...
 
#define U_SHAPE_LENGTH_FIXED_SPACES_NEAR   1
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LAMALEF_NEAR   1
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LENGTH_FIXED_SPACES_AT_END   2
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LAMALEF_END   2
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LENGTH_FIXED_SPACES_AT_BEGINNING   3
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LAMALEF_BEGIN   3
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LAMALEF_AUTO   0x10000
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_LENGTH_MASK   0x10003 /* Changed old value 3 */
 Bit mask for memory options. More...
 
#define U_SHAPE_LAMALEF_MASK   0x10003 /* updated */
 Bit mask for LamAlef memory options. More...
 
#define U_SHAPE_TEXT_DIRECTION_LOGICAL   0
 Direction indicator: the source is in logical (keyboard) order. More...
 
#define U_SHAPE_TEXT_DIRECTION_VISUAL_RTL   0
 Direction indicator: the source is in visual RTL order, the rightmost displayed character stored first. More...
 
#define U_SHAPE_TEXT_DIRECTION_VISUAL_LTR   4
 Direction indicator: the source is in visual LTR order, the leftmost displayed character stored first. More...
 
#define U_SHAPE_TEXT_DIRECTION_MASK   4
 Bit mask for direction indicators. More...
 
#define U_SHAPE_LETTERS_NOOP   0
 Letter shaping option: do not perform letter shaping. More...
 
#define U_SHAPE_LETTERS_SHAPE   8
 Letter shaping option: replace abstract letter characters by "shaped" ones. More...
 
#define U_SHAPE_LETTERS_UNSHAPE   0x10
 Letter shaping option: replace "shaped" letter characters by abstract ones. More...
 
#define U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED   0x18
 Letter shaping option: replace abstract letter characters by "shaped" ones. More...
 
#define U_SHAPE_LETTERS_MASK   0x18
 Bit mask for letter shaping options. More...
 
#define U_SHAPE_DIGITS_NOOP   0
 Digit shaping option: do not perform digit shaping. More...
 
#define U_SHAPE_DIGITS_EN2AN   0x20
 Digit shaping option: Replace European digits (U+0030...) by Arabic-Indic digits. More...
 
#define U_SHAPE_DIGITS_AN2EN   0x40
 Digit shaping option: Replace Arabic-Indic digits by European digits (U+0030...). More...
 
#define U_SHAPE_DIGITS_ALEN2AN_INIT_LR   0x60
 Digit shaping option: Replace European digits (U+0030...) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (u_charDirection() result U_RIGHT_TO_LEFT_ARABIC [AL]). More...
 
#define U_SHAPE_DIGITS_ALEN2AN_INIT_AL   0x80
 Digit shaping option: Replace European digits (U+0030...) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (u_charDirection() result U_RIGHT_TO_LEFT_ARABIC [AL]). More...
 
#define U_SHAPE_DIGITS_RESERVED   0xa0
 Not a valid option value. More...
 
#define U_SHAPE_DIGITS_MASK   0xe0
 Bit mask for digit shaping options. More...
 
#define U_SHAPE_DIGIT_TYPE_AN   0
 Digit type option: Use Arabic-Indic digits (U+0660...U+0669). More...
 
#define U_SHAPE_DIGIT_TYPE_AN_EXTENDED   0x100
 Digit type option: Use Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9). More...
 
#define U_SHAPE_DIGIT_TYPE_RESERVED   0x200
 Not a valid option value. More...
 
#define U_SHAPE_DIGIT_TYPE_MASK   0x300 /* I need to change this from 0x3f00 to 0x300 */
 Bit mask for digit type options. More...
 
#define U_SHAPE_AGGREGATE_TASHKEEL   0x4000
 Tashkeel aggregation option: Replaces any combination of U+0651 with one of U+064C, U+064D, U+064E, U+064F, U+0650 with U+FC5E, U+FC5F, U+FC60, U+FC61, U+FC62 consecutively. More...
 
#define U_SHAPE_AGGREGATE_TASHKEEL_NOOP   0
 Tashkeel aggregation option: do not aggregate tashkeels. More...
 
#define U_SHAPE_AGGREGATE_TASHKEEL_MASK   0x4000
 Bit mask for tashkeel aggregation. More...
 
#define U_SHAPE_PRESERVE_PRESENTATION   0x8000
 Presentation form option: Don't replace Arabic Presentation Forms-A and Arabic Presentation Forms-B characters with 0+06xx characters, before shaping. More...
 
#define U_SHAPE_PRESERVE_PRESENTATION_NOOP   0
 Presentation form option: Replace Arabic Presentation Forms-A and Arabic Presentationo Forms-B with their unshaped correspondants in range 0+06xx, before shaping. More...
 
#define U_SHAPE_PRESERVE_PRESENTATION_MASK   0x8000
 Bit mask for preserve presentation form. More...
 
#define U_SHAPE_SEEN_TWOCELL_NEAR   0x200000
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_SEEN_MASK   0x700000
 Bit mask for Seen memory options. More...
 
#define U_SHAPE_YEHHAMZA_TWOCELL_NEAR   0x1000000
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_YEHHAMZA_MASK   0x3800000
 Bit mask for YehHamza memory options. More...
 
#define U_SHAPE_TASHKEEL_BEGIN   0x40000
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_TASHKEEL_END   0x60000
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_TASHKEEL_RESIZE   0x80000
 Memory option: allow the result to have a different length than the source. More...
 
#define U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL   0xC0000
 Memory option: the result must have the same length as the source. More...
 
#define U_SHAPE_TASHKEEL_MASK   0xE0000
 Bit mask for Tashkeel replacement with Space or Tatweel memory options. More...
 
#define U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END   0x4000000
 This option affect the meaning of BEGIN and END options. More...
 
#define U_SHAPE_SPACES_RELATIVE_TO_TEXT_MASK   0x4000000
 Bit mask for swapping BEGIN and END for Visual LTR text. More...
 
#define U_SHAPE_TAIL_NEW_UNICODE   0x8000000
 If this option is used, shaping will use the new Unicode code point for TAIL (i.e. More...
 
#define U_SHAPE_TAIL_TYPE_MASK   0x8000000
 Bit mask for new Unicode Tail option. More...
 

Functions

int32_t u_shapeArabic (const UChar *source, int32_t sourceLength, UChar *dest, int32_t destSize, uint32_t options, UErrorCode *pErrorCode)
 Shape Arabic text on a character basis. More...
 

Detailed Description

C API: Arabic shaping.

Definition in file ushape.h.

Macro Definition Documentation

§ U_SHAPE_AGGREGATE_TASHKEEL

#define U_SHAPE_AGGREGATE_TASHKEEL   0x4000

Tashkeel aggregation option: Replaces any combination of U+0651 with one of U+064C, U+064D, U+064E, U+064F, U+0650 with U+FC5E, U+FC5F, U+FC60, U+FC61, U+FC62 consecutively.

Stable:
ICU 3.6

Definition at line 311 of file ushape.h.

§ U_SHAPE_AGGREGATE_TASHKEEL_MASK

#define U_SHAPE_AGGREGATE_TASHKEEL_MASK   0x4000

Bit mask for tashkeel aggregation.

Stable:
ICU 3.6

Definition at line 315 of file ushape.h.

§ U_SHAPE_AGGREGATE_TASHKEEL_NOOP

#define U_SHAPE_AGGREGATE_TASHKEEL_NOOP   0

Tashkeel aggregation option: do not aggregate tashkeels.

Stable:
ICU 3.6

Definition at line 313 of file ushape.h.

§ U_SHAPE_DIGIT_TYPE_AN

#define U_SHAPE_DIGIT_TYPE_AN   0

Digit type option: Use Arabic-Indic digits (U+0660...U+0669).

Stable:
ICU 2.0

Definition at line 293 of file ushape.h.

§ U_SHAPE_DIGIT_TYPE_AN_EXTENDED

#define U_SHAPE_DIGIT_TYPE_AN_EXTENDED   0x100

Digit type option: Use Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9).

Stable:
ICU 2.0

Definition at line 296 of file ushape.h.

§ U_SHAPE_DIGIT_TYPE_MASK

#define U_SHAPE_DIGIT_TYPE_MASK   0x300 /* I need to change this from 0x3f00 to 0x300 */

Bit mask for digit type options.

Stable:
ICU 2.0

Definition at line 302 of file ushape.h.

§ U_SHAPE_DIGIT_TYPE_RESERVED

#define U_SHAPE_DIGIT_TYPE_RESERVED   0x200

Not a valid option value.

May be replaced by a new option.

Stable:
ICU 2.0

Definition at line 299 of file ushape.h.

§ U_SHAPE_DIGITS_ALEN2AN_INIT_AL

#define U_SHAPE_DIGITS_ALEN2AN_INIT_AL   0x80

Digit shaping option: Replace European digits (U+0030...) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (u_charDirection() result U_RIGHT_TO_LEFT_ARABIC [AL]).


The direction of "preceding" depends on the direction indicator option. For the first characters, the preceding strongly directional character (initial state) is assumed to be an Arabic letter.

Stable:
ICU 2.0

Definition at line 283 of file ushape.h.

§ U_SHAPE_DIGITS_ALEN2AN_INIT_LR

#define U_SHAPE_DIGITS_ALEN2AN_INIT_LR   0x60

Digit shaping option: Replace European digits (U+0030...) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (u_charDirection() result U_RIGHT_TO_LEFT_ARABIC [AL]).


The direction of "preceding" depends on the direction indicator option. For the first characters, the preceding strongly directional character (initial state) is assumed to be not an Arabic letter (it is U_LEFT_TO_RIGHT [L] or U_RIGHT_TO_LEFT [R]).

Stable:
ICU 2.0

Definition at line 271 of file ushape.h.

§ U_SHAPE_DIGITS_AN2EN

#define U_SHAPE_DIGITS_AN2EN   0x40

Digit shaping option: Replace Arabic-Indic digits by European digits (U+0030...).

Stable:
ICU 2.0

Definition at line 258 of file ushape.h.

§ U_SHAPE_DIGITS_EN2AN

#define U_SHAPE_DIGITS_EN2AN   0x20

Digit shaping option: Replace European digits (U+0030...) by Arabic-Indic digits.

Stable:
ICU 2.0

Definition at line 251 of file ushape.h.

§ U_SHAPE_DIGITS_MASK

#define U_SHAPE_DIGITS_MASK   0xe0

Bit mask for digit shaping options.

Stable:
ICU 2.0

Definition at line 289 of file ushape.h.

§ U_SHAPE_DIGITS_NOOP

#define U_SHAPE_DIGITS_NOOP   0

Digit shaping option: do not perform digit shaping.

Stable:
ICU 2.0

Definition at line 244 of file ushape.h.

§ U_SHAPE_DIGITS_RESERVED

#define U_SHAPE_DIGITS_RESERVED   0xa0

Not a valid option value.

May be replaced by a new option.

Stable:
ICU 2.0

Definition at line 286 of file ushape.h.

§ U_SHAPE_LAMALEF_AUTO

#define U_SHAPE_LAMALEF_AUTO   0x10000

Memory option: the result must have the same length as the source.

Shaping Mode: For each LAMALEF character found, expand LAMALEF using space at end. If there is no space at end, use spaces at beginning of the buffer. If there is no space at beginning of the buffer, use spaces at the near (i.e. the space after the LAMALEF character). If there are no spaces found, an error U_NO_SPACE_AVAILABLE (as defined in utypes.h) will be set in pErrorCode

Deshaping Mode: Perform the same function as the flag equals U_SHAPE_LAMALEF_END. Affects: LamAlef options

Stable:
ICU 4.2

Definition at line 184 of file ushape.h.

§ U_SHAPE_LAMALEF_BEGIN

#define U_SHAPE_LAMALEF_BEGIN   3

Memory option: the result must have the same length as the source.

If more room is necessary, then try to consume spaces at the beginning of the text. Affects: LamAlef options This option is an alias to U_SHAPE_LENGTH_FIXED_SPACES_AT_BEGINNING

Stable:
ICU 4.2

Definition at line 168 of file ushape.h.

§ U_SHAPE_LAMALEF_END

#define U_SHAPE_LAMALEF_END   2

Memory option: the result must have the same length as the source.

If more room is necessary, then try to consume spaces at the end of the text. Affects: LamAlef options This option is an alias to U_SHAPE_LENGTH_FIXED_SPACES_AT_END

Stable:
ICU 4.2

Definition at line 152 of file ushape.h.

§ U_SHAPE_LAMALEF_MASK

#define U_SHAPE_LAMALEF_MASK   0x10003 /* updated */

Bit mask for LamAlef memory options.

Stable:
ICU 4.2

Definition at line 194 of file ushape.h.

§ U_SHAPE_LAMALEF_NEAR

#define U_SHAPE_LAMALEF_NEAR   1

Memory option: the result must have the same length as the source.

If more room is necessary, then try to consume spaces next to modified characters. Affects: LamAlef options This option is an alias to U_SHAPE_LENGTH_FIXED_SPACES_NEAR

Stable:
ICU 4.2

Definition at line 136 of file ushape.h.

§ U_SHAPE_LAMALEF_RESIZE

#define U_SHAPE_LAMALEF_RESIZE   0

Memory option: allow the result to have a different length than the source.

Affects: LamAlef options This option is an alias to U_SHAPE_LENGTH_GROW_SHRINK

Stable:
ICU 4.2

Definition at line 120 of file ushape.h.

§ U_SHAPE_LENGTH_FIXED_SPACES_AT_BEGINNING

#define U_SHAPE_LENGTH_FIXED_SPACES_AT_BEGINNING   3

Memory option: the result must have the same length as the source.

If more room is necessary, then try to consume spaces at the beginning of the text.

Stable:
ICU 2.0

Definition at line 159 of file ushape.h.

§ U_SHAPE_LENGTH_FIXED_SPACES_AT_END

#define U_SHAPE_LENGTH_FIXED_SPACES_AT_END   2

Memory option: the result must have the same length as the source.

If more room is necessary, then try to consume spaces at the end of the text.

Stable:
ICU 2.0

Definition at line 143 of file ushape.h.

§ U_SHAPE_LENGTH_FIXED_SPACES_NEAR

#define U_SHAPE_LENGTH_FIXED_SPACES_NEAR   1

Memory option: the result must have the same length as the source.

If more room is necessary, then try to consume spaces next to modified characters.

Stable:
ICU 2.0

Definition at line 127 of file ushape.h.

§ U_SHAPE_LENGTH_GROW_SHRINK

#define U_SHAPE_LENGTH_GROW_SHRINK   0

Memory option: allow the result to have a different length than the source.

Affects: LamAlef options

Stable:
ICU 2.0

Definition at line 112 of file ushape.h.

§ U_SHAPE_LENGTH_MASK

#define U_SHAPE_LENGTH_MASK   0x10003 /* Changed old value 3 */

Bit mask for memory options.

Stable:
ICU 2.0

Definition at line 187 of file ushape.h.

§ U_SHAPE_LETTERS_MASK

#define U_SHAPE_LETTERS_MASK   0x18

Bit mask for letter shaping options.

Stable:
ICU 2.0

Definition at line 240 of file ushape.h.

§ U_SHAPE_LETTERS_NOOP

#define U_SHAPE_LETTERS_NOOP   0

Letter shaping option: do not perform letter shaping.

Stable:
ICU 2.0

Definition at line 221 of file ushape.h.

§ U_SHAPE_LETTERS_SHAPE

#define U_SHAPE_LETTERS_SHAPE   8

Letter shaping option: replace abstract letter characters by "shaped" ones.

Stable:
ICU 2.0

Definition at line 224 of file ushape.h.

§ U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED

#define U_SHAPE_LETTERS_SHAPE_TASHKEEL_ISOLATED   0x18

Letter shaping option: replace abstract letter characters by "shaped" ones.

The only difference with U_SHAPE_LETTERS_SHAPE is that Tashkeel letters are always "shaped" into the isolated form instead of the medial form (selecting code points from the Arabic Presentation Forms-B block).

Stable:
ICU 2.0

Definition at line 236 of file ushape.h.

§ U_SHAPE_LETTERS_UNSHAPE

#define U_SHAPE_LETTERS_UNSHAPE   0x10

Letter shaping option: replace "shaped" letter characters by abstract ones.

Stable:
ICU 2.0

Definition at line 227 of file ushape.h.

§ U_SHAPE_PRESERVE_PRESENTATION

#define U_SHAPE_PRESERVE_PRESENTATION   0x8000

Presentation form option: Don't replace Arabic Presentation Forms-A and Arabic Presentation Forms-B characters with 0+06xx characters, before shaping.

Stable:
ICU 3.6

Definition at line 323 of file ushape.h.

§ U_SHAPE_PRESERVE_PRESENTATION_MASK

#define U_SHAPE_PRESERVE_PRESENTATION_MASK   0x8000

Bit mask for preserve presentation form.

Stable:
ICU 3.6

Definition at line 331 of file ushape.h.

§ U_SHAPE_PRESERVE_PRESENTATION_NOOP

#define U_SHAPE_PRESERVE_PRESENTATION_NOOP   0

Presentation form option: Replace Arabic Presentation Forms-A and Arabic Presentationo Forms-B with their unshaped correspondants in range 0+06xx, before shaping.

Stable:
ICU 3.6

Definition at line 329 of file ushape.h.

§ U_SHAPE_SEEN_MASK

#define U_SHAPE_SEEN_MASK   0x700000

Bit mask for Seen memory options.

Stable:
ICU 4.2

Definition at line 352 of file ushape.h.

§ U_SHAPE_SEEN_TWOCELL_NEAR

#define U_SHAPE_SEEN_TWOCELL_NEAR   0x200000

Memory option: the result must have the same length as the source.

Shaping mode: The SEEN family character will expand into two characters using space near the SEEN family character(i.e. the space after the character). If there are no spaces found, an error U_NO_SPACE_AVAILABLE (as defined in utypes.h) will be set in pErrorCode

De-shaping mode: Any Seen character followed by Tail character will be replaced by one cell Seen and a space will replace the Tail. Affects: Seen options

Stable:
ICU 4.2

Definition at line 346 of file ushape.h.

§ U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END

#define U_SHAPE_SPACES_RELATIVE_TO_TEXT_BEGIN_END   0x4000000

This option affect the meaning of BEGIN and END options.

if this option is not used the default for BEGIN and END will be as following: The Default (for both Visual LTR, Visual RTL and Logical Text)

  1. BEGIN always refers to the start address of physical memory.
  2. END always refers to the end address of physical memory.

If this option is used it will swap the meaning of BEGIN and END only for Visual LTR text.

The effect on BEGIN and END Memory Options will be as following: A. BEGIN For Visual LTR text: This will be the beginning (right side) of the visual text( corresponding to the physical memory address end for Visual LTR text, Same as END in default behavior) B. BEGIN For Logical text: Same as BEGIN in default behavior. C. END For Visual LTR text: This will be the end (left side) of the visual text (corresponding to the physical memory address beginning for Visual LTR text, Same as BEGIN in default behavior. D. END For Logical text: Same as END in default behavior). Affects: All LamAlef BEGIN, END and AUTO options.

Stable:
ICU 4.2

Definition at line 448 of file ushape.h.

§ U_SHAPE_SPACES_RELATIVE_TO_TEXT_MASK

#define U_SHAPE_SPACES_RELATIVE_TO_TEXT_MASK   0x4000000

Bit mask for swapping BEGIN and END for Visual LTR text.

Stable:
ICU 4.2

Definition at line 454 of file ushape.h.

§ U_SHAPE_TAIL_NEW_UNICODE

#define U_SHAPE_TAIL_NEW_UNICODE   0x8000000

If this option is used, shaping will use the new Unicode code point for TAIL (i.e.

0xFE73). If this option is not specified (Default), old unofficial Unicode TAIL code point is used (i.e. 0x200B) De-shaping will not use this option as it will always search for both the new Unicode code point for the TAIL (i.e. 0xFE73) or the old unofficial Unicode TAIL code point (i.e. 0x200B) and de-shape the Seen-Family letter accordingly.

Shaping Mode: Only shaping. De-shaping Mode: N/A. Affects: All Seen options

Stable:
ICU 4.8

Definition at line 468 of file ushape.h.

§ U_SHAPE_TAIL_TYPE_MASK

#define U_SHAPE_TAIL_TYPE_MASK   0x8000000

Bit mask for new Unicode Tail option.

Stable:
ICU 4.8

Definition at line 474 of file ushape.h.

§ U_SHAPE_TASHKEEL_BEGIN

#define U_SHAPE_TASHKEEL_BEGIN   0x40000

Memory option: the result must have the same length as the source.

Shaping mode: Tashkeel characters will be replaced by spaces. Spaces will be placed at beginning of the buffer

De-shaping mode: N/A Affects: Tashkeel options

Stable:
ICU 4.2

Definition at line 386 of file ushape.h.

§ U_SHAPE_TASHKEEL_END

#define U_SHAPE_TASHKEEL_END   0x60000

Memory option: the result must have the same length as the source.

Shaping mode: Tashkeel characters will be replaced by spaces. Spaces will be placed at end of the buffer

De-shaping mode: N/A Affects: Tashkeel options

Stable:
ICU 4.2

Definition at line 397 of file ushape.h.

§ U_SHAPE_TASHKEEL_MASK

#define U_SHAPE_TASHKEEL_MASK   0xE0000

Bit mask for Tashkeel replacement with Space or Tatweel memory options.

Stable:
ICU 4.2

Definition at line 424 of file ushape.h.

§ U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL

#define U_SHAPE_TASHKEEL_REPLACE_BY_TATWEEL   0xC0000

Memory option: the result must have the same length as the source.

Shaping mode: Tashkeel characters will be replaced by Tatweel if it is connected to adjacent characters (i.e. shaped on Tatweel) or replaced by space if it is not connected.

De-shaping mode: N/A Affects: YehHamza options

Stable:
ICU 4.2

Definition at line 418 of file ushape.h.

§ U_SHAPE_TASHKEEL_RESIZE

#define U_SHAPE_TASHKEEL_RESIZE   0x80000

Memory option: allow the result to have a different length than the source.

Shaping mode: Tashkeel characters will be removed, buffer length will shrink. De-shaping mode: N/A

Affect: Tashkeel options

Stable:
ICU 4.2

Definition at line 407 of file ushape.h.

§ U_SHAPE_TEXT_DIRECTION_LOGICAL

#define U_SHAPE_TEXT_DIRECTION_LOGICAL   0

Direction indicator: the source is in logical (keyboard) order.

Stable:
ICU 2.0

Definition at line 197 of file ushape.h.

§ U_SHAPE_TEXT_DIRECTION_MASK

#define U_SHAPE_TEXT_DIRECTION_MASK   4

Bit mask for direction indicators.

Stable:
ICU 2.0

Definition at line 217 of file ushape.h.

§ U_SHAPE_TEXT_DIRECTION_VISUAL_LTR

#define U_SHAPE_TEXT_DIRECTION_VISUAL_LTR   4

Direction indicator: the source is in visual LTR order, the leftmost displayed character stored first.

Stable:
ICU 2.0

Definition at line 214 of file ushape.h.

§ U_SHAPE_TEXT_DIRECTION_VISUAL_RTL

#define U_SHAPE_TEXT_DIRECTION_VISUAL_RTL   0

Direction indicator: the source is in visual RTL order, the rightmost displayed character stored first.

This option is an alias to U_SHAPE_TEXT_DIRECTION_LOGICAL

Stable:
ICU 4.2

Definition at line 206 of file ushape.h.

§ U_SHAPE_YEHHAMZA_MASK

#define U_SHAPE_YEHHAMZA_MASK   0x3800000

Bit mask for YehHamza memory options.

Stable:
ICU 4.2

Definition at line 374 of file ushape.h.

§ U_SHAPE_YEHHAMZA_TWOCELL_NEAR

#define U_SHAPE_YEHHAMZA_TWOCELL_NEAR   0x1000000

Memory option: the result must have the same length as the source.

Shaping mode: The YEHHAMZA character will expand into two characters using space near it (i.e. the space after the character If there are no spaces found, an error U_NO_SPACE_AVAILABLE (as defined in utypes.h) will be set in pErrorCode

De-shaping mode: Any Yeh (final or isolated) character followed by Hamza character will be replaced by one cell YehHamza and space will replace the Hamza. Affects: YehHamza options

Stable:
ICU 4.2

Definition at line 367 of file ushape.h.

Function Documentation

§ u_shapeArabic()

int32_t u_shapeArabic ( const UChar source,
int32_t  sourceLength,
UChar dest,
int32_t  destSize,
uint32_t  options,
UErrorCode pErrorCode 
)

Shape Arabic text on a character basis.

This function performs basic operations for "shaping" Arabic text. It is most useful for use with legacy data formats and legacy display technology (simple terminals). All operations are performed on Unicode characters.

Text-based shaping means that some character code points in the text are replaced by others depending on the context. It transforms one kind of text into another. In comparison, modern displays for Arabic text select appropriate, context-dependent font glyphs for each text element, which means that they transform text into a glyph vector.

Text transformations are necessary when modern display technology is not available or when text needs to be transformed to or from legacy formats that use "shaped" characters. Since the Arabic script is cursive, connecting adjacent letters to each other, computers select images for each letter based on the surrounding letters. This usually results in four images per Arabic letter: initial, middle, final, and isolated forms. In Unicode, on the other hand, letters are normally stored abstract, and a display system is expected to select the necessary glyphs. (This makes searching and other text processing easier because the same letter has only one code.) It is possible to mimic this with text transformations because there are characters in Unicode that are rendered as letters with a specific shape (or cursive connectivity). They were included for interoperability with legacy systems and codepages, and for unsophisticated display systems.

A second kind of text transformations is supported for Arabic digits: For compatibility with legacy codepages that only include European digits, it is possible to replace one set of digits by another, changing the character code points. These operations can be performed for either Arabic-Indic Digits (U+0660...U+0669) or Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9).

Some replacements may result in more or fewer characters (code points). By default, this means that the destination buffer may receive text with a length different from the source length. Some legacy systems rely on the length of the text to be constant. They expect extra spaces to be added or consumed either next to the affected character or at the end of the text.

For details about the available operations, see the description of the U_SHAPE_... options.

Parameters
sourceThe input text.
sourceLengthThe number of UChars in source.
destThe destination buffer that will receive the results of the requested operations. It may be NULL only if destSize is 0. The source and destination must not overlap.
destSizeThe size (capacity) of the destination buffer in UChars. If destSize is 0, then no output is produced, but the necessary buffer size is returned ("preflighting").
optionsThis is a 32-bit set of flags that specify the operations that are performed on the input text. If no error occurs, then the result will always be written to the destination buffer.
pErrorCodemust be a valid pointer to an error code value, which must not indicate a failure before the function call.
Returns
The number of UChars written to the destination buffer. If an error occured, then no output was written, or it may be incomplete. If U_BUFFER_OVERFLOW_ERROR is set, then the return value indicates the necessary destination buffer size.
Stable:
ICU 2.0