507 lines
17 KiB
C
507 lines
17 KiB
C
/*
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**********************************************************************
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* Copyright (C) 1997-1999, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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*
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* File ULOC.H
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*
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* Modification History:
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*
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* Date Name Description
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* 04/01/97 aliu Creation.
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* 08/22/98 stephen JDK 1.2 sync.
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* 12/08/98 rtg New C API for Locale
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* 03/30/99 damiba overhaul
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* 03/31/99 helena Javadoc for uloc functions.
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* 04/15/99 Madhu Updated Javadoc
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********************************************************************************
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*/
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#ifndef ULOC_H
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#define ULOC_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: Locale
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*
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* <h2> ULoc C API for Locale </h2>
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* A <code>Locale</code> represents a specific geographical, political,
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* or cultural region. An operation that requires a <code>Locale</code> to perform
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* its task is called <em>locale-sensitive</em> and uses the <code>Locale</code>
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* to tailor information for the user. For example, displaying a number
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* is a locale-sensitive operation--the number should be formatted
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* according to the customs/conventions of the user's native country,
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* region, or culture. In the C APIs, a locales is simply a const char string.
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*
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* <P>
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* You create a <code>Locale</code> with one of the three options listed below.
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* Each of the component is separated by '_' in the locale string.
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* <blockquote>
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* <pre>
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* \code
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* newLanguage
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*
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* newLanguage + newCountry
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*
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* newLanguage + newCountry + newVariant
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* \endcode
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* </pre>
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* </blockquote>
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* The first option is a valid <STRONG>ISO
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* Language Code.</STRONG> These codes are the lower-case two-letter
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* codes as defined by ISO-639.
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* You can find a full list of these codes at a number of sites, such as:
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* <BR><a href ="http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt">
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* <code>http://www.ics.uci.edu/pub/ietf/http/related/iso639.txt</code></a>
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*
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* <P>
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* The second option includes an additonal <STRONG>ISO Country
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* Code.</STRONG> These codes are the upper-case two-letter codes
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* as defined by ISO-3166.
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* You can find a full list of these codes at a number of sites, such as:
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* <BR><a href="http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html">
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* <code>http://www.chemie.fu-berlin.de/diverse/doc/ISO_3166.html</code></a>
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*
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* <P>
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* The third option requires another additonal information--the
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* <STRONG>Variant.</STRONG>
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* The Variant codes are vendor and browser-specific.
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* For example, use WIN for Windows, MAC for Macintosh, and POSIX for POSIX.
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* Where there are two variants, separate them with an underscore, and
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* put the most important one first. For
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* example, a Traditional Spanish collation might be referenced, with
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* "ES", "ES", "Traditional_WIN".
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*
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* <P>
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* Because a <code>Locale</code> is just an identifier for a region,
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* no validity check is performed when you specify a <code>Locale</code>.
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* If you want to see whether particular resources are available for the
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* <code>Locale</code> you asked for, you must query those resources. For
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* example, ask the <code>UNumberFormat</code> for the locales it supports
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* using its <code>getAvailable</code> method.
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* <BR><STRONG>Note:</STRONG> When you ask for a resource for a particular
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* locale, you get back the best available match, not necessarily
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* precisely what you asked for. For more information, look at
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* <a href="ures.html"><code>UResourceBundle</code></a>.
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*
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* <P>
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* The <code>Locale</code> provides a number of convenient constants
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* that you can use to specify the commonly used
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* locales. For example, the following refers to a locale
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* for the United States:
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* <blockquote>
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* <pre>
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* \code
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* ULOC_US
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* \endcode
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* </pre>
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* </blockquote>
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*
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* <P>
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* Once you've specified a locale you can query it for information about
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* itself. Use <code>uloc_getCountry</code> to get the ISO Country Code and
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* <code>uloc_getLanguage</code> to get the ISO Language Code. You can
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* use <code>uloc_getDisplayCountry</code> to get the
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* name of the country suitable for displaying to the user. Similarly,
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* you can use <code>uloc_getDisplayLanguage</code> to get the name of
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* the language suitable for displaying to the user. Interestingly,
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* the <code>uloc_getDisplayXXX</code> methods are themselves locale-sensitive
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* and have two versions: one that uses the default locale and one
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* that takes a locale as an argument and displays the name or country in
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* a language appropriate to that locale.
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*
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* <P>
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* The ICU provides a number of services that perform locale-sensitive
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* operations. For example, the <code>unum_xxx</code> functions format
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* numbers, currency, or percentages in a locale-sensitive manner.
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* </P>
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* <blockquote>
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* <pre>
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* \code
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* UErrorCode success = U_ZERO_ERROR;
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* UNumberFormat *nf;
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* const char* myLocale = "fr_FR";
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*
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* nf = unum_open( UNUM_DEFAULT, NULL, success );
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* unum_close(nf);
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* nf = unum_open( UNUM_CURRENCY, NULL, success );
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* unum_close(nf);
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* nf = unum_open( UNUM_PERCENT, NULL, success );
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* unum_close(nf);
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* \endcode
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* </pre>
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* </blockquote>
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* Each of these methods has two variants; one with an explicit locale
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* and one without; the latter using the default locale.
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* <blockquote>
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* <pre>
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* \code
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*
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* nf = unum_open( UNUM_DEFAULT, myLocale, success );
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* unum_close(nf);
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* nf = unum_open( UNUM_CURRENCY, myLocale, success );
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* unum_close(nf);
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* nf = unum_open( UNUM_PERCENT, myLocale, success );
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* unum_close(nf);
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* \endcode
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* </pre>
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* </blockquote>
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* A <code>Locale</code> is the mechanism for identifying the kind of services
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* (<code>UNumberFormat</code>) that you would like to get. The locale is
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* <STRONG>just</STRONG> a mechanism for identifying these services.
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*
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* <P>
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* Each international serivce that performs locale-sensitive operations
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* allows you
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* to get all the available objects of that type. You can sift
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* through these objects by language, country, or variant,
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* and use the display names to present a menu to the user.
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* For example, you can create a menu of all the collation objects
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* suitable for a given language. Such classes implement these
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* three class methods:
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* <blockquote>
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* <pre>
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* \code
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* const char* uloc_getAvailable(int32_t index);
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* int32_t uloc_countAvailable();
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* int32_t
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* uloc_getDisplayName(const char* localeID,
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* const char* inLocaleID,
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* UChar* result,
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* int32_t maxResultSize,
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* UErrorCode* err);
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*
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* \endcode
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* </pre>
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* </blockquote>
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*/
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/*
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*
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* Useful constants for language.
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*/
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#define ULOC_CHINESE "zh"
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#define ULOC_ENGLISH "en"
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#define ULOC_FRENCH "fr"
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#define ULOC_GERMAN "de"
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#define ULOC_ITALIAN "it"
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#define ULOC_JAPANESE "ja"
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#define ULOC_KOREAN "ko"
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#define ULOC_SIMPLIFIED_CHINESE "zh_CN"
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#define ULOC_TRADITIONAL_CHINESE "zh_TW"
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/*
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*
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* Useful constants for country.
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*/
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#define ULOC_CANADA "en_CA"
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#define ULOC_CANADA_FRENCH "fr_CA"
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#define ULOC_CHINA "zh_CN"
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#define ULOC_PRC "zh_CN"
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#define ULOC_FRANCE "fr_FR"
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#define ULOC_GERMANY "de_DE"
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#define ULOC_ITALY "it_IT"
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#define ULOC_JAPAN "ja_JP"
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#define ULOC_KOREA "ko_KR"
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#define ULOC_TAIWAN "zh_TW"
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#define ULOC_UK "en_GB"
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#define ULOC_US "en_US"
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/**
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* Gets ICU's default locale. This pointer and/or the contents of the pointer may
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* become invalid if the uloc_setDefault() is called, so copy the contents of the
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* pointer before calling uloc_setDefault().
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*
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* @return the ICU default locale
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* @system
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* @stable
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*/
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U_CAPI const char* U_EXPORT2
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uloc_getDefault(void);
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/**
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* Sets ICU's default locale. Call this once during setup or program initialization.
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*
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* @param localeID the new ICU default locale. A value of NULL will try to get
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* the system's default locale.
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* @param status the error information if the setting of default locale fails
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* @system
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* @stable
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*/
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U_CAPI void U_EXPORT2
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uloc_setDefault(const char* localeID,
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UErrorCode* status);
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/**
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* Gets the language code for the specified locale.
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*
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* @param localeID the locale to get the ISO langauge code with
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* @param language the langauge code for localeID
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* @param languageCapacity the size of the language buffer to store the
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* language code with
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* @param err error information if retrieving the language code failed
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* @return the actual buffer size needed for the langauge code. If it's greater
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* than languageCapacity, the returned language code will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getLanguage(const char* localeID,
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char* language,
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int32_t languageCapacity,
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UErrorCode* err);
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/**
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* Gets the country code for the specified locale.
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*
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* @param localeID the locale to get the country code with
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* @param country the country code for localeID
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* @param languageCapacity the size of the coutry buffer to store the
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* country code with
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* @param err error information if retrieving the country code failed
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* @return the actual buffer size needed for the country code. If it's greater
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* than countryCapacity, the returned country code will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getCountry(const char* localeID,
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char* country,
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int32_t countryCapacity,
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UErrorCode* err);
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/**
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* Gets the variant code for the specified locale.
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*
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* @param localeID the locale to get the variant code with
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* @param variant the variant code for localeID
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* @param variantCapacity the size of the variant buffer to store the
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* variant code with
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* @param err error information if retrieving the variant code failed
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* @return the actual buffer size needed for the variant code. If it's greater
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* than variantCapacity, the returned variant code will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getVariant(const char* localeID,
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char* variant,
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int32_t variantCapacity,
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UErrorCode* err);
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/**
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* Gets the full name for the specified locale.
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*
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* @param localeID the locale to get the full name with
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* @param name the full name for localeID
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* @param nameCapacity the size of the name buffer to store the
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* full name with
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* @param err error information if retrieving the full name failed
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* @return the actual buffer size needed for the full name. If it's greater
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* than nameCapacity, the returned full name will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getName(const char* localeID,
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char* name,
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int32_t nameCapacity,
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UErrorCode* err);
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/**
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* Gets the ISO language code for the specified locale.
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*
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* @param localeID the locale to get the ISO langauge code with
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* @return language the ISO langauge code for localeID
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* @stable
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*/
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U_CAPI const char* U_EXPORT2
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uloc_getISO3Language(const char* localeID);
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/**
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* Gets the ISO country code for the specified locale.
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*
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* @param localeID the locale to get the ISO country code with
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* @return country the ISO country code for localeID
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* @stable
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*/
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U_CAPI const char* U_EXPORT2
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uloc_getISO3Country(const char* localeID);
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/**
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* Gets the Win32 LCID value for the specified locale.
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*
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* @param localeID the locale to get the Win32 LCID value with
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* @return country the Win32 LCID for localeID
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* @stable
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*/
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U_CAPI uint32_t U_EXPORT2
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uloc_getLCID(const char* localeID);
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/**
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* Gets the language name suitable for display for the specified locale.
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*
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* @param localeID the locale to get the ISO langauge code with
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* @param language the displayable langauge code for localeID
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* @param languageCapacity the size of the language buffer to store the
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* displayable language code with
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* @param err error information if retrieving the displayable language code failed
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* @return the actual buffer size needed for the displayable langauge code. If it's greater
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* than languageCapacity, the returned language code will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getDisplayLanguage(const char* locale,
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const char* inLocale,
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UChar* language,
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int32_t languageCapacity,
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UErrorCode* status);
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/**
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* Gets the country name suitable for display for the specified locale.
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*
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* @param localeID the locale to get the displayable country code with
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* @param country the displayable country code for localeID
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* @param languageCapacity the size of the coutry buffer to store the
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* displayable country code with
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* @param err error information if retrieving the displayable country code failed
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* @return the actual buffer size needed for the displayable country code. If it's greater
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* than countryCapacity, the returned displayable country code will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getDisplayCountry(const char* locale,
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const char* inLocale,
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UChar* country,
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int32_t countryCapacity,
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UErrorCode* status); /* NULL may be used to specify the default */
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/**
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* Gets the variant code suitable for display for the specified locale.
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*
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* @param localeID the locale to get the displayable variant code with
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* @param variant the displayable variant code for localeID
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* @param variantCapacity the size of the variant buffer to store the
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* displayable variant code with
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* @param err error information if retrieving the displayable variant code failed
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* @return the actual buffer size needed for the displayable variant code. If it's greater
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* than variantCapacity, the returned displayable variant code will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getDisplayVariant(const char* locale,
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const char* inLocale,
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UChar* variant,
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int32_t variantCapacity,
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UErrorCode* status); /* NULL may be used to specify the default */
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/**
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* Gets the full name suitable for display for the specified locale.
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*
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* @param localeID the locale to get the displayable name with
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* @param variant the displayable name for localeID
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* @param variantCapacity the size of the name buffer to store the
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* displayable full name with
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* @param err error information if retrieving the displayable name failed
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* @return the actual buffer size needed for the displayable name. If it's greater
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* than variantCapacity, the returned displayable name will be truncated.
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2
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uloc_getDisplayName(const char* localeID,
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const char* inLocaleID, /* NULL may be used to specify the default */
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UChar* result,
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int32_t maxResultSize,
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UErrorCode* err);
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/**
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*
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* Gets the specified locale from a list of all available locales.
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* The return value is a pointer to an item of
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* a locale name array. Both this array and the pointers
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* it contains are owned by ICU and should not be deleted or written through
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* by the caller. The locale name is terminated by a null pointer.
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* @param n the specific locale name index of the available locale list
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* @return a specified locale name of all available locales
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* @stable
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*/
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U_CAPI const char* U_EXPORT2
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uloc_getAvailable(int32_t n);
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/**
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* Gets the size of the all available locale list.
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*
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* @return the size of the locale list
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* @stable
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*/
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U_CAPI int32_t U_EXPORT2 uloc_countAvailable(void);
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/**
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*
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* Gets a list of all available language codes defined in ISO 639. This is a pointer
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* to an array of pointers to arrays of char. All of these pointers are owned
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* by ICU-- do not delete them, and do not write through them. The array is
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* terminated with a null pointer.
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* @return a list of all available language codes
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* @stable
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*/
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U_CAPI const char* const* U_EXPORT2
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uloc_getISOLanguages(void);
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/**
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*
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* Gets a list of all available 2-letter country codes defined in ISO 639. This is a
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* pointer to an array of pointers to arrays of char. All of these pointers are
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* owned by ICU-- do not delete them, and do not write through them. The array is
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* terminated with a null pointer.
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* @return a list of all available country codes
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* @stable
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*/
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U_CAPI const char* const* U_EXPORT2
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uloc_getISOCountries(void);
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/**
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* Deprecated 1999dec14 - Gets the directory containing the locale data files.
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*
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* @return the locale data file directory
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* @deprecated 1999dec14 - Remove after 2000dec14
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*/
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#define uloc_getDataDirectory u_getDataDirectory
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/**
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* Deprecated 1999dec14 - Sets the directory containing the locale data files.
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*
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* @return the new directory to fetch locale data from
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* @deprecated 1999dec14 - Remove after 2000dec14
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*/
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#define uloc_setDataDirectory u_setDataDirectory
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/*Internal function */
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int32_t U_EXPORT2
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uloc_getParent(const char* localeID,
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char* parent,
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int32_t parentCapacity,
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UErrorCode* err);
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/*eof*/
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#endif /*_ULOC*/
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