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ICU 77.1: icu::FilteredNormalizer2 Class Reference

Normalization filtered by a UnicodeSet. More...

#include <normalizer2.h>

Normalization filtered by a UnicodeSet.

Normalizes portions of the text contained in the filter set and leaves portions not contained in the filter set unchanged. Filtering is done via UnicodeSet::span(..., USET_SPAN_SIMPLE). Not-in-the-filter text is treated as "is normalized" and "quick check yes". This class implements all of (and only) the Normalizer2 API. An instance of this class is unmodifiable/immutable but is constructed and must be destructed by the owner.

Stable:

ICU 4.4

Definition at line 519 of file normalizer2.h.

Constructs a filtered normalizer wrapping any Normalizer2 instance and a filter set.

Both are aliased and must not be modified or deleted while this object is used. The filter set should be frozen; otherwise the performance will suffer greatly.

Parameters

Stable:

ICU 4.4

Definition at line 531 of file normalizer2.h.

Appends the second string to the first string (merging them at the boundary) and returns the first string.

The result is normalized if both the strings were normalized. The first and second strings must be different objects.

Parameters

first string, should be normalized second string, should be normalized errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

first

Stable:

ICU 4.4

Implements icu::Normalizer2.

Performs pairwise composition of a & b and returns the composite if there is one.

For details see the base class documentation.

This function is independent of the mode of the Normalizer2.

Parameters

a A (normalization starter) code point. b Another code point.

Returns

The non-negative composite code point if there is one; otherwise a negative value.

Stable:

ICU 49

Reimplemented from icu::Normalizer2.

Gets the combining class of c.

The default implementation returns 0 but all standard implementations return the Unicode Canonical_Combining_Class value.

Parameters

Returns

c's combining class

Stable:

ICU 49

Reimplemented from icu::Normalizer2.

Gets the decomposition mapping of c.

For details see the base class documentation.

This function is independent of the mode of the Normalizer2.

Parameters

c code point decomposition String object which will be set to c's decomposition mapping, if there is one.

Returns

true if c has a decomposition, otherwise false

Stable:

ICU 4.6

Implements icu::Normalizer2.

Gets the raw decomposition mapping of c.

For details see the base class documentation.

This function is independent of the mode of the Normalizer2.

Parameters

c code point decomposition String object which will be set to c's raw decomposition mapping, if there is one.

Returns

true if c has a decomposition, otherwise false

Stable:

ICU 49

Reimplemented from icu::Normalizer2.

Tests if the character always has a normalization boundary after it, regardless of context.

For details see the Normalizer2 base class documentation.

Parameters

Returns

true if c has a normalization boundary after it

Stable:

ICU 4.4

Implements icu::Normalizer2.

Tests if the character always has a normalization boundary before it, regardless of context.

For details see the Normalizer2 base class documentation.

Parameters

Returns

true if c has a normalization boundary before it

Stable:

ICU 4.4

Implements icu::Normalizer2.

Tests if the character is normalization-inert.

For details see the Normalizer2 base class documentation.

Parameters

Returns

true if c is normalization-inert

Stable:

ICU 4.4

Implements icu::Normalizer2.

Tests if the string is normalized.

For details see the Normalizer2 base class documentation.

Parameters

s input string errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

true if s is normalized

Stable:

ICU 4.4

Implements icu::Normalizer2.

Tests if the UTF-8 string is normalized.

Internally, in cases where the quickCheck() method would return "maybe" (which is only possible for the two COMPOSE modes) this method resolves to "yes" or "no" to provide a definitive result, at the cost of doing more work in those cases.

This works for all normalization modes. It is optimized for UTF-8 for all built-in modes except for FCD. The base class implementation converts to UTF-16 and calls isNormalized().

Parameters

s UTF-8 input string errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

true if s is normalized

Stable:

ICU 60

Reimplemented from icu::Normalizer2.

Writes the normalized form of the source string to the destination string (replacing its contents) and returns the destination string.

The source and destination strings must be different objects.

Parameters

src source string dest destination string; its contents is replaced with normalized src errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

dest

Stable:

ICU 4.4

Implements icu::Normalizer2.

Appends the normalized form of the second string to the first string (merging them at the boundary) and returns the first string.

The result is normalized if the first string was normalized. The first and second strings must be different objects.

Parameters

first string, should be normalized second string, will be normalized errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

first

Stable:

ICU 4.4

Implements icu::Normalizer2.

Normalizes a UTF-8 string and optionally records how source substrings relate to changed and unchanged result substrings.

Implemented completely for most built-in modes except for FCD. The base class implementation converts to & from UTF-16 and does not support edits.

Parameters

options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET. src Source UTF-8 string. sink A ByteSink to which the normalized UTF-8 result string is written. sink.Flush() is called at the end. edits Records edits for index mapping, working with styled text, and getting only changes (if any). The Edits contents is undefined if any error occurs. This function calls edits->reset() first unless options includes U_EDITS_NO_RESET. edits can be nullptr. errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Stable:

ICU 60

Reimplemented from icu::Normalizer2.

Tests if the string is normalized.

For details see the Normalizer2 base class documentation.

Parameters

s input string errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

UNormalizationCheckResult

Stable:

ICU 4.4

Implements icu::Normalizer2.

Returns the end of the normalized substring of the input string.

For details see the Normalizer2 base class documentation.

Parameters

s input string errorCode Standard ICU error code. Its input value must pass the U_SUCCESS() test, or else the function returns immediately. Check for U_FAILURE() on output or use with function chaining. (See User Guide for details.)

Returns

"yes" span end index

Stable:

ICU 4.4

Implements icu::Normalizer2.

The documentation for this class was generated from the following file:

• common/unicode/normalizer2.h

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