ICU 76.1: common/unicode/ulocbuilder.h File Reference

ICU 76.1 76.1

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ulocbuilder.h File Reference

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

`#include "unicode/localpointer.h"`
`#include "unicode/ulocale.h"`
`#include "unicode/utypes.h"`

Go to the source code of this file.

## Namespaces
namespace | icu
| File coll.h.

## Typedefs
typedef struct ULocaleBuilder | ULocaleBuilder
| C typedef for struct ULocaleBuilder.

## Functions
U_CAPI ULocaleBuilder * | ulocbld_open (void)
| `ULocaleBuilder` is used to build valid `locale` id string or IETF BCP 47 language tag from values configured by the setters.
U_CAPI void | ulocbld_close (ULocaleBuilder *builder)
| Close the builder and destroy it's internal states.
U_CAPI void | ulocbld_setLocale (ULocaleBuilder *builder, const char *locale, int32_t length)
| Resets the `ULocaleBuilder` to match the provided `locale`.
U_CAPI void | ulocbld_adoptULocale (ULocaleBuilder *builder, ULocale *locale)
| Resets the `ULocaleBuilder` to match the provided `ULocale`.
U_CAPI void | ulocbld_setLanguageTag (ULocaleBuilder *builder, const char *tag, int32_t length)
| Resets the ULocaleBuilder to match the provided IETF BCP 47 language tag.
U_CAPI void | ulocbld_setLanguage (ULocaleBuilder *builder, const char *language, int32_t length)
| Sets the language.
U_CAPI void | ulocbld_setScript (ULocaleBuilder *builder, const char *script, int32_t length)
| Sets the script.
U_CAPI void | ulocbld_setRegion (ULocaleBuilder *builder, const char *region, int32_t length)
| Sets the region.
U_CAPI void | ulocbld_setVariant (ULocaleBuilder *builder, const char *variant, int32_t length)
| Sets the variant.
U_CAPI void | ulocbld_setExtension (ULocaleBuilder *builder, char key, const char *value, int32_t length)
| Sets the extension for the given key.
U_CAPI void | ulocbld_setUnicodeLocaleKeyword (ULocaleBuilder *builder, const char *key, int32_t keyLength, const char *type, int32_t typeLength)
| Sets the Unicode locale keyword type for the given key.
U_CAPI void | ulocbld_addUnicodeLocaleAttribute (ULocaleBuilder *builder, const char *attribute, int32_t length)
| Adds a unicode locale attribute, if not already present, otherwise has no effect.
U_CAPI void | ulocbld_removeUnicodeLocaleAttribute (ULocaleBuilder *builder, const char *attribute, int32_t length)
| Removes a unicode locale attribute, if present, otherwise has no effect.
U_CAPI void | ulocbld_clear (ULocaleBuilder *builder)
| Resets the builder to its initial, empty state.
U_CAPI void | ulocbld_clearExtensions (ULocaleBuilder *builder)
| Resets the extensions to their initial, empty state.
U_CAPI int32_t | ulocbld_buildLocaleID (ULocaleBuilder *builder, char *locale, int32_t localeCapacity, UErrorCode *err)
| Build the LocaleID string from the fields set on this builder.
U_CAPI ULocale * | ulocbld_buildULocale (ULocaleBuilder *builder, UErrorCode *err)
| Build the ULocale object from the fields set on this builder.
U_CAPI int32_t | ulocbld_buildLanguageTag (ULocaleBuilder *builder, char *language, int32_t languageCapacity, UErrorCode *err)
| Build the IETF BCP 47 language tag string from the fields set on this builder.
U_CAPI UBool | ulocbld_copyErrorTo (const ULocaleBuilder *builder, UErrorCode *outErrorCode)
| Sets the UErrorCode if an error occurred while recording sets.

## Detailed Description

C API: Builder API for Locale.

Definition in file ulocbuilder.h.

## Typedef Documentation

## ◆ ULocaleBuilder

typedef struct ULocaleBuilder ULocaleBuilder

C typedef for struct ULocaleBuilder.

Stable
  ICU 74

Definition at line 25 of file ulocbuilder.h.

## Function Documentation

## ◆ ulocbld_addUnicodeLocaleAttribute()

U_CAPI void ulocbld_addUnicodeLocaleAttribute | ( | ULocaleBuilder * | builder,
|  | const char * | attribute,
|  | int32_t | length )

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

## ◆ ulocbld_adoptULocale()

U_CAPI void ulocbld_adoptULocale | ( | ULocaleBuilder * | builder,
|  | ULocale * | locale )

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

## ◆ ulocbld_buildLanguageTag()

U_CAPI int32_t ulocbld_buildLanguageTag | ( | ULocaleBuilder * | builder,
|  | char * | language,
|  | int32_t | languageCapacity,
|  | UErrorCode * | err )

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

## ◆ ulocbld_buildLocaleID()

U_CAPI int32_t ulocbld_buildLocaleID | ( | ULocaleBuilder * | builder,
|  | char * | locale,
|  | int32_t | localeCapacity,
|  | UErrorCode * | err )

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

## ◆ ulocbld_buildULocale()

U_CAPI ULocale * ulocbld_buildULocale | ( | ULocaleBuilder * | builder,
|  | UErrorCode * | err )

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

## ◆ ulocbld_clear()

U_CAPI void ulocbld_clear | ( | ULocaleBuilder * | builder | ) |

Resets the builder to its initial, empty state.

This method clears the internal UErrorCode.

Parameters

  builder | the builder

Stable
  ICU 74

## ◆ ulocbld_clearExtensions()

U_CAPI void ulocbld_clearExtensions | ( | ULocaleBuilder * | builder | ) |

Resets the extensions to their initial, empty state.

Language, script, region and variant are unchanged.

Parameters

  builder | the builder

Stable
  ICU 74

## ◆ ulocbld_close()

U_CAPI void ulocbld_close | ( | ULocaleBuilder * | builder | ) |

Close the builder and destroy it's internal states.

Parameters

  builder | the builder

Stable
  ICU 74

## ◆ ulocbld_copyErrorTo()

U_CAPI UBool ulocbld_copyErrorTo | ( | const ULocaleBuilder * | builder,
|  | UErrorCode * | outErrorCode )

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

## ◆ ulocbld_open()

U_CAPI ULocaleBuilder * ulocbld_open | ( | void |  | ) |

`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

## ◆ ulocbld_removeUnicodeLocaleAttribute()

U_CAPI void ulocbld_removeUnicodeLocaleAttribute | ( | ULocaleBuilder * | builder,
|  | const char * | attribute,
|  | int32_t | length )

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

## ◆ ulocbld_setExtension()

U_CAPI void ulocbld_setExtension | ( | ULocaleBuilder * | builder,
|  | char | key,
|  | const char * | value,
|  | int32_t | length )

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

## ◆ ulocbld_setLanguage()

U_CAPI void ulocbld_setLanguage | ( | ULocaleBuilder * | builder,
|  | const char * | language,
|  | int32_t | length )

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

## ◆ ulocbld_setLanguageTag()

U_CAPI void ulocbld_setLanguageTag | ( | ULocaleBuilder * | builder,
|  | const char * | tag,
|  | int32_t | length )

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

## ◆ ulocbld_setLocale()

U_CAPI void ulocbld_setLocale | ( | ULocaleBuilder * | builder,
|  | const char * | locale,
|  | int32_t | length )

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

## ◆ ulocbld_setRegion()

U_CAPI void ulocbld_setRegion | ( | ULocaleBuilder * | builder,
|  | const char * | region,
|  | int32_t | length )

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

## ◆ ulocbld_setScript()

U_CAPI void ulocbld_setScript | ( | ULocaleBuilder * | builder,
|  | const char * | script,
|  | int32_t | length )

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

## ◆ ulocbld_setUnicodeLocaleKeyword()

U_CAPI void ulocbld_setUnicodeLocaleKeyword | ( | ULocaleBuilder * | builder,
|  | const char * | key,
|  | int32_t | keyLength,
|  | const char * | type,
|  | int32_t | typeLength )

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

## ◆ ulocbld_setVariant()

U_CAPI void ulocbld_setVariant | ( | ULocaleBuilder * | builder,
|  | const char * | variant,
|  | int32_t | length )

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