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ICU 77.1: common/unicode/ulocbuilder.h File Reference

C API: Builder API for Locale. More...

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C API: Builder API for Locale.

Definition in file ulocbuilder.h.

Adds a unicode locale attribute, if not already present, otherwise has no effect.

The attribute must not be empty string and must be well-formed or U_ILLEGAL_ARGUMENT_ERROR will be set to status during the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() calls.

Parameters

builder the builder attribute the attribute, a const char * pointer (need not be terminated when the length is non-negative) length the length of the attribute; if negative, then the attribute need to be null terminated,

Stable:

ICU 74

Resets the ULocaleBuilder to match the provided ULocale.

Existing state is discarded.

The locale must be not bogus.

This method clears the internal UErrorCode.

Parameters

builder the builder. locale the locale, a ULocale* pointer. The builder adopts the locale after the call and the client must not delete it.

Stable:

ICU 74

Build the IETF BCP 47 language tag string from the fields set on this builder.

If any set methods or during the ulocbld_buildLanguageTag() call require memory allocation but fail U_MEMORY_ALLOCATION_ERROR will be set to status. If any of the fields set by the setters are not well-formed, the status will be set to U_ILLEGAL_ARGUMENT_ERROR. The state of the builder will not change after the ulocbld_buildLanguageTag() call and the caller is free to keep using the same builder to build more locales.

Parameters

builder the builder language the language tag languageCapacity the size of the language buffer to store the language tag err the error code

Returns

the length of the language tag in buffer

Stable:

ICU 74

Build the LocaleID string from the fields set on this builder.

If any set methods or during the ulocbld_buildLocaleID() call require memory allocation but fail U_MEMORY_ALLOCATION_ERROR will be set to status. If any of the fields set by the setters are not well-formed, the status will be set to U_ILLEGAL_ARGUMENT_ERROR. The state of the builder will not change after the ulocbld_buildLocaleID() call and the caller is free to keep using the same builder to build more locales.

Parameters

builder the builder locale the locale id localeCapacity the size of the locale buffer to store the locale id err the error code

Returns

the length of the locale id in buffer

Stable:

ICU 74

Build the ULocale object from the fields set on this builder.

If any set methods or during the ulocbld_buildULocale() call require memory allocation but fail U_MEMORY_ALLOCATION_ERROR will be set to status. If any of the fields set by the setters are not well-formed, the status will be set to U_ILLEGAL_ARGUMENT_ERROR. The state of the builder will not change after the ulocbld_buildULocale() call and the caller is free to keep using the same builder to build more locales.

Parameters

builder the builder. err the error code.

Returns

the locale, a ULocale* pointer. The created ULocale must be destroyed by calling ulocale_close.

Stable:

ICU 74

Resets the builder to its initial, empty state.

This method clears the internal UErrorCode.

Parameters

Stable:

ICU 74

Resets the extensions to their initial, empty state.

Language, script, region and variant are unchanged.

Parameters

Stable:

ICU 74

Close the builder and destroy it's internal states.

Parameters

Stable:

ICU 74

Sets the UErrorCode if an error occurred while recording sets.

Preserves older error codes in the outErrorCode.

Parameters

builder the builder outErrorCode Set to an error code that occurred while setting subtags. Unchanged if there is no such error or if outErrorCode already contained an error.

Returns

true if U_FAILURE(*outErrorCode)

Stable:

ICU 74

ULocaleBuilder is used to build valid locale id string or IETF BCP 47 language tag from values configured by the setters.

The ULocaleBuilder checks if a value configured by a setter satisfies the syntax requirements defined by the Locale class. A string of Locale created by a ULocaleBuilder is well-formed and can be transformed to a well-formed IETF BCP 47 language tag without losing information.

The following example shows how to create a locale string with the ULocaleBuilder.

    UErrorCode err = U_ZERO_ERROR;
    char buffer[ULOC_FULLNAME_CAPACITY];
    ULocaleBuilder* builder = ulocbld_open();
    ulocbld_setLanguage(builder, "sr", -1);
    ulocbld_setScript(builder, "Latn", -1);
    ulocbld_setRegion(builder, "RS", -1);
    int32_t length = ulocbld_buildLocaleID(
        builder, buffer, ULOC_FULLNAME_CAPACITY, &error);
    ulocbld_close(builder);

ULocaleBuilders can be reused; ulocbld_clear() resets all fields to their default values.

ULocaleBuilder tracks errors in an internal UErrorCode. For all setters, except ulocbld_setLanguageTag and ulocbld_setLocale, ULocaleBuilder will return immediately if the internal UErrorCode is in error state. To reset internal state and error code, call clear method. The ulocbld_setLanguageTag and setLocale method will first clear the internal UErrorCode, then track the error of the validation of the input parameter into the internal UErrorCode.

Stable:

ICU 74

Constructs an empty ULocaleBuilder. The default value of all fields, extensions, and private use information is the empty string. The created builder should be destroyed by calling ulocbld_close();

Stable:

ICU 74

Removes a unicode locale attribute, if present, otherwise has no effect.

The attribute must not be empty string and must be well-formed or U_ILLEGAL_ARGUMENT_ERROR will be set to status during the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() calls.

Attribute comparison for removal is case-insensitive.

Parameters

builder the builder attribute the attribute, a const char * pointer (need not be terminated when the length is non-negative) length the length of the attribute; if negative, then the attribute need to be null terminated,

Stable:

ICU 74

Sets the extension for the given key.

If the value is the empty string, the extension is removed. Otherwise, the key and value must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

Note: The key ('u') is used for the Unicode locale extension. Setting a value for this key replaces any existing Unicode locale key/type pairs with those defined in the extension.

Note: The key ('x') is used for the private use code. To be well-formed, the value for this key needs only to have subtags of one to eight alphanumeric characters, not two to eight as in the general case.

Parameters

builder the builder key the extension key value the value, a const char * pointer (need not be terminated when the length is non-negative) length the length of the value; if negative, then the value need to be null terminated,

Stable:

ICU 74

Sets the language.

If language is the empty string, the language in this ULocaleBuilder is removed. Otherwise, the language must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

The syntax of language value is defined as unicode_language_subtag.

Parameters

builder the builder language the language, a const char * pointer (need not be terminated when the length is non-negative) length the length of the language; if negative, then the language need to be null terminated,

Stable:

ICU 74

Resets the ULocaleBuilder to match the provided IETF BCP 47 language tag.

Discards the existing state. The empty string causes the builder to be reset, like ulocbld_clear. Legacy language tags (marked as “Type: grandfathered” in BCP 47) are converted to their canonical form before being processed. Otherwise, the language tag must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

This method clears the internal UErrorCode.

Parameters

builder the builder tag the language tag, defined as IETF BCP 47 language tag, a const char * pointer (need not be terminated when the length is non-negative) length the length of the tag; if negative, then the tag need to be null terminated,

Stable:

ICU 74

Resets the ULocaleBuilder to match the provided locale.

Existing state is discarded.

All fields of the locale must be well-formed.

This method clears the internal UErrorCode.

Parameters

builder the builder locale the locale, a const char * pointer (need not be terminated when the length is non-negative) length the length of the locale; if negative, then the locale need to be null terminated,

Stable:

ICU 74

Sets the region.

If region is the empty string, the region in this ULocaleBuilder is removed. Otherwise, the region must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

The region value is defined by unicode_region_subtag as a two-letter ISO 3166 code or a three-digit UN M.49 area code.

The region value in the Locale created by the ULocaleBuilder is always normalized to upper case.

Parameters

builder the builder region the region, a const char * pointer (need not be terminated when the length is non-negative) length the length of the region; if negative, then the region need to be null terminated,

Stable:

ICU 74

Sets the script.

If script is the empty string, the script in this ULocaleBuilder is removed. Otherwise, the script must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

The script value is a four-letter script code as unicode_script_subtag defined by ISO 15924

Parameters

builder the builder script the script, a const char * pointer (need not be terminated when the length is non-negative) length the length of the script; if negative, then the script need to be null terminated,

Stable:

ICU 74

Sets the Unicode locale keyword type for the given key.

If the type StringPiece is constructed with a nullptr, the keyword is removed. If the type is the empty string, the keyword is set without type subtags. Otherwise, the key and type must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

Keys and types are converted to lower case.

Note:Setting the 'u' extension via ulocbld_setExtension replaces all Unicode locale keywords with those defined in the extension.

Parameters

builder the builder key the Unicode locale key, a const char * pointer (need not be terminated when the length is non-negative) keyLength the length of the key; if negative, then the key need to be null terminated, type the Unicode locale type, a const char * pointer (need not be terminated when the length is non-negative) typeLength the length of the type; if negative, then the type need to be null terminated,

Returns

This builder.

Stable:

ICU 74

Sets the variant.

If variant is the empty string, the variant in this ULocaleBuilder is removed. Otherwise, the variant must be well-formed, or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later report an U_ILLEGAL_ARGUMENT_ERROR.

Note: This method checks if variant satisfies the unicode_variant_subtag syntax requirements, and normalizes the value to lowercase letters. However, the Locale class does not impose any syntactic restriction on variant. To set an ill-formed variant, use a Locale constructor. If there are multiple unicode_variant_subtag, the caller must concatenate them with '-' as separator (ex: "foobar-fibar").

Parameters

builder the builder variant the variant, a const char * pointer (need not be terminated when the length is non-negative) length the length of the variant; if negative, then the variant need to be null terminated,

Stable:

ICU 74

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