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// © 2023 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
#ifndef __ULOCBUILDER_H__
#define __ULOCBUILDER_H__
#include "unicode/localpointer.h"
#include "unicode/ulocale.h"
#include "unicode/utypes.h"
/**
* \file
* \brief C API: Builder API for Locale
*/
#ifndef U_HIDE_DRAFT_API
/**
* Opaque C service object type for the locale builder API
* @draft ICU 74
*/
struct ULocaleBuilder;
/**
* C typedef for struct ULocaleBuilder.
* @draft ICU 74
*/
typedef struct ULocaleBuilder ULocaleBuilder;
/**
* <code>ULocaleBuilder</code> is used to build valid <code>locale</code> id
* string or IETF BCP 47 language tag from values configured by the setters.
* The <code>ULocaleBuilder</code> checks if a value configured by a
* setter satisfies the syntax requirements defined by the <code>Locale</code>
* class. A string of Locale created by a <code>ULocaleBuilder</code> is
* well-formed and can be transformed to a well-formed IETF BCP 47 language tag
* without losing information.
*
* <p>The following example shows how to create a <code>locale</code> string
* with the <code>ULocaleBuilder</code>.
* <blockquote>
* <pre>
* 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);
* </pre>
* </blockquote>
*
* <p>ULocaleBuilders can be reused; <code>ulocbld_clear()</code> resets all
* fields to their default values.
*
* <p>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.
*
* @draft 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();
*
* @draft ICU 74
*/
U_CAPI ULocaleBuilder* U_EXPORT2
ulocbld_open();
/**
* Close the builder and destroy it's internal states.
* @param builder the builder
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_close(ULocaleBuilder* builder);
/**
* Resets the <code>ULocaleBuilder</code> to match the provided
* <code>locale</code>. Existing state is discarded.
*
* <p>All fields of the locale must be well-formed.
* <p>This method clears the internal UErrorCode.
*
* @param builder the builder
* @param locale the locale, a const char * pointer (need not be terminated when
* the length is non-negative)
* @param length the length of the locale; if negative, then the locale need to be
* null terminated,
*
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setLocale(ULocaleBuilder* builder, const char* locale, int32_t length);
/**
* Resets the <code>ULocaleBuilder</code> to match the provided
* <code>ULocale</code>. Existing state is discarded.
*
* <p>The locale must be not bogus.
* <p>This method clears the internal UErrorCode.
*
* @param builder the builder.
* @param locale the locale, a ULocale* pointer. The builder adopts the locale
* after the call and the client must not delete it.
*
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_adoptULocale(ULocaleBuilder* builder, ULocale* locale);
/**
* 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 {@link #ulocbld_clear}.
* Legacy language tags (marked as “Type: grandfathered” in BCP 47)
* are converted to their canonical form before being processed.
* Otherwise, the <code>language tag</code> must be well-formed,
* or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods
* will later report an U_ILLEGAL_ARGUMENT_ERROR.
*
* <p>This method clears the internal UErrorCode.
*
* @param builder the builder
* @param 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)
* @param length the length of the tag; if negative, then the tag need to be
* null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setLanguageTag(ULocaleBuilder* builder, const char* tag, int32_t length);
/**
* Sets the language. If <code>language</code> is the empty string, the
* language in this <code>ULocaleBuilder</code> is removed. Otherwise, the
* <code>language</code> must be well-formed, or else the ulocbld_buildLocaleID()
* and ulocbld_buildLanguageTag() methods will
* later report an U_ILLEGAL_ARGUMENT_ERROR.
*
* <p>The syntax of language value is defined as
* [unicode_language_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_language_subtag).
*
* @param builder the builder
* @param language the language, a const char * pointer (need not be terminated when
* the length is non-negative)
* @param length the length of the language; if negative, then the language need to be
* null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setLanguage(ULocaleBuilder* builder, const char* language, int32_t length);
/**
* Sets the script. If <code>script</code> is the empty string, the script in
* this <code>ULocaleBuilder</code> is removed.
* Otherwise, the <code>script</code> must be well-formed, or else the
* ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later
* report an U_ILLEGAL_ARGUMENT_ERROR.
*
* <p>The script value is a four-letter script code as
* [unicode_script_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_script_subtag)
* defined by ISO 15924
*
* @param builder the builder
* @param script the script, a const char * pointer (need not be terminated when
* the length is non-negative)
* @param length the length of the script; if negative, then the script need to be
* null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setScript(ULocaleBuilder* builder, const char* script, int32_t length);
/**
* Sets the region. If region is the empty string, the region in this
* <code>ULocaleBuilder</code> is removed. Otherwise, the <code>region</code>
* must be well-formed, or else the ulocbld_buildLocaleID() and
* ulocbld_buildLanguageTag() methods will later report an
* U_ILLEGAL_ARGUMENT_ERROR.
*
* <p>The region value is defined by
* [unicode_region_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_region_subtag)
* as a two-letter ISO 3166 code or a three-digit UN M.49 area code.
*
* <p>The region value in the <code>Locale</code> created by the
* <code>ULocaleBuilder</code> is always normalized to upper case.
*
* @param builder the builder
* @param region the region, a const char * pointer (need not be terminated when
* the length is non-negative)
* @param length the length of the region; if negative, then the region need to be
* null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setRegion(ULocaleBuilder* builder, const char* region, int32_t length);
/**
* Sets the variant. If variant is the empty string, the variant in this
* <code>ULocaleBuilder</code> is removed. Otherwise, the <code>variant</code>
* must be well-formed, or else the ulocbld_buildLocaleID() and
* ulocbld_buildLanguageTag() methods will later report an
* U_ILLEGAL_ARGUMENT_ERROR.
*
* <p><b>Note:</b> This method checks if <code>variant</code>
* satisfies the
* [unicode_variant_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_variant_subtag)
* syntax requirements, and normalizes the value to lowercase letters. However,
* the <code>Locale</code> 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").
*
* @param builder the builder
* @param variant the variant, a const char * pointer (need not be terminated when
* the length is non-negative)
* @param length the length of the variant; if negative, then the variant need to be
* null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setVariant(ULocaleBuilder* builder, const char* variant, int32_t length);
/**
* Sets the extension for the given key. If the value is the empty string,
* the extension is removed. Otherwise, the <code>key</code> and
* <code>value</code> must be well-formed, or else the ulocbld_buildLocaleID()
* and ulocbld_buildLanguageTag() methods will
* later report an U_ILLEGAL_ARGUMENT_ERROR.
*
* <p><b>Note:</b> 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.
*
* <p><b>Note:</b> 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.
*
* @param builder the builder
* @param key the extension key
* @param value the value, a const char * pointer (need not be terminated when
* the length is non-negative)
* @param length the length of the value; if negative, then the value need to be
* null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setExtension(ULocaleBuilder* builder, char key, const char* value, int32_t length);
/**
* 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.
*
* <p>Keys and types are converted to lower case.
*
* <p><b>Note</b>:Setting the 'u' extension via {@link #ulocbld_setExtension}
* replaces all Unicode locale keywords with those defined in the
* extension.
*
* @param builder the builder
* @param key the Unicode locale key, a const char * pointer (need not be
* terminated when the length is non-negative)
* @param keyLength the length of the key; if negative, then the key need to be
* null terminated,
* @param type the Unicode locale type, a const char * pointer (need not be
* terminated when the length is non-negative)
* @param typeLength the length of the type; if negative, then the type need to
* be null terminated,
* @return This builder.
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_setUnicodeLocaleKeyword(ULocaleBuilder* builder,
const char* key, int32_t keyLength, const char* type, int32_t typeLength);
/**
* 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.
*
* @param builder the builder
* @param attribute the attribute, a const char * pointer (need not be
* terminated when the length is non-negative)
* @param length the length of the attribute; if negative, then the attribute
* need to be null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_addUnicodeLocaleAttribute(
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.
*
* <p>Attribute comparison for removal is case-insensitive.
*
* @param builder the builder
* @param attribute the attribute, a const char * pointer (need not be
* terminated when the length is non-negative)
* @param length the length of the attribute; if negative, then the attribute
* need to be null terminated,
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_removeUnicodeLocaleAttribute(
ULocaleBuilder* builder, const char* attribute, int32_t length);
/**
* Resets the builder to its initial, empty state.
* <p>This method clears the internal UErrorCode.
*
* @param builder the builder
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_clear(ULocaleBuilder* builder);
/**
* Resets the extensions to their initial, empty state.
* Language, script, region and variant are unchanged.
*
* @param builder the builder
* @draft ICU 74
*/
U_CAPI void U_EXPORT2
ulocbld_clearExtensions(ULocaleBuilder* builder);
/**
* 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.
*
* @param builder the builder
* @param locale the locale id
* @param localeCapacity the size of the locale buffer to store the locale id
* @param err the error code
* @return the length of the locale id in buffer
* @draft ICU 74
*/
U_CAPI int32_t U_EXPORT2
ulocbld_buildLocaleID(ULocaleBuilder* builder, char* locale,
int32_t localeCapacity, 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.
*
* @param builder the builder.
* @param err the error code.
* @return the locale, a ULocale* pointer. The created ULocale must be
* destroyed by calling {@link ulocale_close}.
* @draft ICU 74
*/
U_CAPI ULocale* U_EXPORT2
ulocbld_buildULocale(ULocaleBuilder* builder, 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.
*
* @param builder the builder
* @param language the language tag
* @param languageCapacity the size of the language buffer to store the language
* tag
* @param err the error code
* @return the length of the language tag in buffer
* @draft ICU 74
*/
U_CAPI int32_t U_EXPORT2
ulocbld_buildLanguageTag(ULocaleBuilder* builder, char* language,
int32_t languageCapacity, UErrorCode* err);
/**
* Sets the UErrorCode if an error occurred while recording sets.
* Preserves older error codes in the outErrorCode.
*
* @param builder the builder
* @param 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.
* @return true if U_FAILURE(*outErrorCode)
* @draft ICU 74
*/
U_CAPI UBool U_EXPORT2
ulocbld_copyErrorTo(const ULocaleBuilder* builder, UErrorCode *outErrorCode);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalULocaleBuilderPointer
* "Smart pointer" class, closes a ULocaleBuilder via ulocbld_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @draft ICU 74
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalULocaleBuilderPointer, ULocaleBuilder, ulocbld_close);
U_NAMESPACE_END
#endif /* U_SHOW_CPLUSPLUS_API */
#endif /* U_HIDE_DRAFT_API */
#endif // __ULOCBUILDER_H__
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