442 lines
17 KiB
C++
442 lines
17 KiB
C++
// © 2023 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#ifndef __ULOCBUILDER_H__
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#define __ULOCBUILDER_H__
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#include "unicode/localpointer.h"
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#include "unicode/ulocale.h"
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#include "unicode/utypes.h"
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/**
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* \file
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* \brief C API: Builder API for Locale
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*/
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#ifndef U_HIDE_DRAFT_API
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/**
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* Opaque C service object type for the locale builder API
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* @draft ICU 74
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*/
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struct ULocaleBuilder;
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/**
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* C typedef for struct ULocaleBuilder.
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* @draft ICU 74
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*/
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typedef struct ULocaleBuilder ULocaleBuilder;
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/**
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* <code>ULocaleBuilder</code> is used to build valid <code>locale</code> id
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* string or IETF BCP 47 language tag from values configured by the setters.
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* The <code>ULocaleBuilder</code> checks if a value configured by a
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* setter satisfies the syntax requirements defined by the <code>Locale</code>
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* class. A string of Locale created by a <code>ULocaleBuilder</code> is
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* well-formed and can be transformed to a well-formed IETF BCP 47 language tag
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* without losing information.
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*
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* <p>The following example shows how to create a <code>locale</code> string
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* with the <code>ULocaleBuilder</code>.
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* <blockquote>
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* <pre>
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* UErrorCode err = U_ZERO_ERROR;
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* char buffer[ULOC_FULLNAME_CAPACITY];
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* ULocaleBuilder* builder = ulocbld_open();
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* ulocbld_setLanguage(builder, "sr", -1);
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* ulocbld_setScript(builder, "Latn", -1);
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* ulocbld_setRegion(builder, "RS", -1);
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* int32_t length = ulocbld_buildLocaleID(
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* builder, buffer, ULOC_FULLNAME_CAPACITY, &error);
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* ulocbld_close(builder);
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* </pre>
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* </blockquote>
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*
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* <p>ULocaleBuilders can be reused; <code>ulocbld_clear()</code> resets all
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* fields to their default values.
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*
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* <p>ULocaleBuilder tracks errors in an internal UErrorCode. For all setters,
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* except ulocbld_setLanguageTag and ulocbld_setLocale, ULocaleBuilder will return immediately
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* if the internal UErrorCode is in error state.
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* To reset internal state and error code, call clear method.
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* The ulocbld_setLanguageTag and setLocale method will first clear the internal
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* UErrorCode, then track the error of the validation of the input parameter
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* into the internal UErrorCode.
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*
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* @draft ICU 74
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*/
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/**
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* Constructs an empty ULocaleBuilder. The default value of all
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* fields, extensions, and private use information is the
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* empty string. The created builder should be destroyed by calling
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* ulocbld_close();
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*
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* @draft ICU 74
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*/
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U_CAPI ULocaleBuilder* U_EXPORT2
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ulocbld_open();
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/**
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* Close the builder and destroy it's internal states.
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* @param builder the builder
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_close(ULocaleBuilder* builder);
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/**
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* Resets the <code>ULocaleBuilder</code> to match the provided
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* <code>locale</code>. Existing state is discarded.
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*
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* <p>All fields of the locale must be well-formed.
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* <p>This method clears the internal UErrorCode.
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*
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* @param builder the builder
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* @param locale the locale, a const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the locale; if negative, then the locale need to be
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* null terminated,
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*
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setLocale(ULocaleBuilder* builder, const char* locale, int32_t length);
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/**
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* Resets the <code>ULocaleBuilder</code> to match the provided
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* <code>ULocale</code>. Existing state is discarded.
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*
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* <p>The locale must be not bogus.
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* <p>This method clears the internal UErrorCode.
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*
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* @param builder the builder.
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* @param locale the locale, a ULocale* pointer. The builder adopts the locale
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* after the call and the client must not delete it.
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*
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_adoptULocale(ULocaleBuilder* builder, ULocale* locale);
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/**
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* Resets the ULocaleBuilder to match the provided IETF BCP 47 language tag.
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* Discards the existing state.
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* The empty string causes the builder to be reset, like {@link #ulocbld_clear}.
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* Legacy language tags (marked as “Type: grandfathered” in BCP 47)
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* are converted to their canonical form before being processed.
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* Otherwise, the <code>language tag</code> must be well-formed,
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* or else the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods
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* will later report an U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p>This method clears the internal UErrorCode.
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*
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* @param builder the builder
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* @param tag the language tag, defined as IETF BCP 47 language tag, a
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* const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the tag; if negative, then the tag need to be
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* null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setLanguageTag(ULocaleBuilder* builder, const char* tag, int32_t length);
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/**
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* Sets the language. If <code>language</code> is the empty string, the
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* language in this <code>ULocaleBuilder</code> is removed. Otherwise, the
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* <code>language</code> must be well-formed, or else the ulocbld_buildLocaleID()
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* and ulocbld_buildLanguageTag() methods will
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* later report an U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p>The syntax of language value is defined as
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* [unicode_language_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_language_subtag).
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*
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* @param builder the builder
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* @param language the language, a const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the language; if negative, then the language need to be
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* null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setLanguage(ULocaleBuilder* builder, const char* language, int32_t length);
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/**
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* Sets the script. If <code>script</code> is the empty string, the script in
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* this <code>ULocaleBuilder</code> is removed.
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* Otherwise, the <code>script</code> must be well-formed, or else the
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* ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later
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* report an U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p>The script value is a four-letter script code as
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* [unicode_script_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_script_subtag)
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* defined by ISO 15924
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*
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* @param builder the builder
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* @param script the script, a const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the script; if negative, then the script need to be
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* null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setScript(ULocaleBuilder* builder, const char* script, int32_t length);
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/**
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* Sets the region. If region is the empty string, the region in this
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* <code>ULocaleBuilder</code> is removed. Otherwise, the <code>region</code>
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* must be well-formed, or else the ulocbld_buildLocaleID() and
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* ulocbld_buildLanguageTag() methods will later report an
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* U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p>The region value is defined by
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* [unicode_region_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_region_subtag)
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* as a two-letter ISO 3166 code or a three-digit UN M.49 area code.
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*
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* <p>The region value in the <code>Locale</code> created by the
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* <code>ULocaleBuilder</code> is always normalized to upper case.
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*
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* @param builder the builder
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* @param region the region, a const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the region; if negative, then the region need to be
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* null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setRegion(ULocaleBuilder* builder, const char* region, int32_t length);
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/**
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* Sets the variant. If variant is the empty string, the variant in this
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* <code>ULocaleBuilder</code> is removed. Otherwise, the <code>variant</code>
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* must be well-formed, or else the ulocbld_buildLocaleID() and
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* ulocbld_buildLanguageTag() methods will later report an
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* U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p><b>Note:</b> This method checks if <code>variant</code>
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* satisfies the
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* [unicode_variant_subtag](http://www.unicode.org/reports/tr35/tr35.html#unicode_variant_subtag)
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* syntax requirements, and normalizes the value to lowercase letters. However,
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* the <code>Locale</code> class does not impose any syntactic
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* restriction on variant. To set an ill-formed variant, use a Locale constructor.
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* If there are multiple unicode_variant_subtag, the caller must concatenate
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* them with '-' as separator (ex: "foobar-fibar").
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*
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* @param builder the builder
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* @param variant the variant, a const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the variant; if negative, then the variant need to be
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* null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setVariant(ULocaleBuilder* builder, const char* variant, int32_t length);
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/**
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* Sets the extension for the given key. If the value is the empty string,
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* the extension is removed. Otherwise, the <code>key</code> and
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* <code>value</code> must be well-formed, or else the ulocbld_buildLocaleID()
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* and ulocbld_buildLanguageTag() methods will
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* later report an U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p><b>Note:</b> The key ('u') is used for the Unicode locale extension.
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* Setting a value for this key replaces any existing Unicode locale key/type
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* pairs with those defined in the extension.
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*
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* <p><b>Note:</b> The key ('x') is used for the private use code. To be
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* well-formed, the value for this key needs only to have subtags of one to
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* eight alphanumeric characters, not two to eight as in the general case.
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*
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* @param builder the builder
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* @param key the extension key
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* @param value the value, a const char * pointer (need not be terminated when
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* the length is non-negative)
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* @param length the length of the value; if negative, then the value need to be
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* null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setExtension(ULocaleBuilder* builder, char key, const char* value, int32_t length);
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/**
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* Sets the Unicode locale keyword type for the given key. If the type
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* StringPiece is constructed with a nullptr, the keyword is removed.
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* If the type is the empty string, the keyword is set without type subtags.
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* Otherwise, the key and type must be well-formed, or else the
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* ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() methods will later
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* report an U_ILLEGAL_ARGUMENT_ERROR.
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*
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* <p>Keys and types are converted to lower case.
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*
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* <p><b>Note</b>:Setting the 'u' extension via {@link #ulocbld_setExtension}
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* replaces all Unicode locale keywords with those defined in the
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* extension.
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*
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* @param builder the builder
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* @param key the Unicode locale key, a const char * pointer (need not be
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* terminated when the length is non-negative)
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* @param keyLength the length of the key; if negative, then the key need to be
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* null terminated,
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* @param type the Unicode locale type, a const char * pointer (need not be
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* terminated when the length is non-negative)
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* @param typeLength the length of the type; if negative, then the type need to
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* be null terminated,
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* @return This builder.
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_setUnicodeLocaleKeyword(ULocaleBuilder* builder,
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const char* key, int32_t keyLength, const char* type, int32_t typeLength);
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/**
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* Adds a unicode locale attribute, if not already present, otherwise
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* has no effect. The attribute must not be empty string and must be
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* well-formed or U_ILLEGAL_ARGUMENT_ERROR will be set to status
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* during the ulocbld_buildLocaleID() and ulocbld_buildLanguageTag() calls.
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*
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* @param builder the builder
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* @param attribute the attribute, a const char * pointer (need not be
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* terminated when the length is non-negative)
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* @param length the length of the attribute; if negative, then the attribute
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* need to be null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_addUnicodeLocaleAttribute(
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ULocaleBuilder* builder, const char* attribute, int32_t length);
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/**
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* Removes a unicode locale attribute, if present, otherwise has no
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* effect. The attribute must not be empty string and must be well-formed
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* or U_ILLEGAL_ARGUMENT_ERROR will be set to status during the ulocbld_buildLocaleID()
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* and ulocbld_buildLanguageTag() calls.
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*
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* <p>Attribute comparison for removal is case-insensitive.
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*
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* @param builder the builder
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* @param attribute the attribute, a const char * pointer (need not be
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* terminated when the length is non-negative)
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* @param length the length of the attribute; if negative, then the attribute
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* need to be null terminated,
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_removeUnicodeLocaleAttribute(
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ULocaleBuilder* builder, const char* attribute, int32_t length);
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/**
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* Resets the builder to its initial, empty state.
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* <p>This method clears the internal UErrorCode.
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*
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* @param builder the builder
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_clear(ULocaleBuilder* builder);
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/**
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* Resets the extensions to their initial, empty state.
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* Language, script, region and variant are unchanged.
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*
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* @param builder the builder
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* @draft ICU 74
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*/
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U_CAPI void U_EXPORT2
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ulocbld_clearExtensions(ULocaleBuilder* builder);
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/**
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* Build the LocaleID string from the fields set on this builder.
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* If any set methods or during the ulocbld_buildLocaleID() call require memory
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* allocation but fail U_MEMORY_ALLOCATION_ERROR will be set to status.
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* If any of the fields set by the setters are not well-formed, the status
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* will be set to U_ILLEGAL_ARGUMENT_ERROR. The state of the builder will
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* not change after the ulocbld_buildLocaleID() call and the caller is
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* free to keep using the same builder to build more locales.
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*
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* @param builder the builder
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* @param locale the locale id
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* @param localeCapacity the size of the locale buffer to store the locale id
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* @param err the error code
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* @return the length of the locale id in buffer
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* @draft ICU 74
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*/
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U_CAPI int32_t U_EXPORT2
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ulocbld_buildLocaleID(ULocaleBuilder* builder, char* locale,
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int32_t localeCapacity, UErrorCode* err);
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/**
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* Build the ULocale object from the fields set on this builder.
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* If any set methods or during the ulocbld_buildULocale() call require memory
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* allocation but fail U_MEMORY_ALLOCATION_ERROR will be set to status.
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* If any of the fields set by the setters are not well-formed, the status
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* will be set to U_ILLEGAL_ARGUMENT_ERROR. The state of the builder will
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* not change after the ulocbld_buildULocale() call and the caller is
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* free to keep using the same builder to build more locales.
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*
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* @param builder the builder.
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* @param err the error code.
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* @return the locale, a ULocale* pointer. The created ULocale must be
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* destroyed by calling {@link ulocale_close}.
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* @draft ICU 74
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*/
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U_CAPI ULocale* U_EXPORT2
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ulocbld_buildULocale(ULocaleBuilder* builder, UErrorCode* err);
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/**
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* Build the IETF BCP 47 language tag string from the fields set on this builder.
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* If any set methods or during the ulocbld_buildLanguageTag() call require memory
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* allocation but fail U_MEMORY_ALLOCATION_ERROR will be set to status.
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* If any of the fields set by the setters are not well-formed, the status
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* will be set to U_ILLEGAL_ARGUMENT_ERROR. The state of the builder will
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* not change after the ulocbld_buildLanguageTag() call and the caller is free
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* to keep using the same builder to build more locales.
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*
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* @param builder the builder
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* @param language the language tag
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* @param languageCapacity the size of the language buffer to store the language
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* tag
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* @param err the error code
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* @return the length of the language tag in buffer
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* @draft ICU 74
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*/
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U_CAPI int32_t U_EXPORT2
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ulocbld_buildLanguageTag(ULocaleBuilder* builder, char* language,
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int32_t languageCapacity, UErrorCode* err);
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/**
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* Sets the UErrorCode if an error occurred while recording sets.
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* Preserves older error codes in the outErrorCode.
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*
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* @param builder the builder
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* @param outErrorCode Set to an error code that occurred while setting subtags.
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* Unchanged if there is no such error or if outErrorCode
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* already contained an error.
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* @return true if U_FAILURE(*outErrorCode)
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* @draft ICU 74
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*/
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U_CAPI UBool U_EXPORT2
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ulocbld_copyErrorTo(const ULocaleBuilder* builder, UErrorCode *outErrorCode);
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#if U_SHOW_CPLUSPLUS_API
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U_NAMESPACE_BEGIN
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/**
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* \class LocalULocaleBuilderPointer
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* "Smart pointer" class, closes a ULocaleBuilder via ulocbld_close().
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* For most methods see the LocalPointerBase base class.
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*
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* @see LocalPointerBase
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* @see LocalPointer
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* @draft ICU 74
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*/
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U_DEFINE_LOCAL_OPEN_POINTER(LocalULocaleBuilderPointer, ULocaleBuilder, ulocbld_close);
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U_NAMESPACE_END
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#endif /* U_SHOW_CPLUSPLUS_API */
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#endif /* U_HIDE_DRAFT_API */
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#endif // __ULOCBUILDER_H__
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