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**********************************************************************
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* Copyright (c) 2003-2004, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* Created: March 19 2003
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**********************************************************************
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#include "unicode/utypes.h"
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#include "unicode/ures.h"
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* \brief C API: Message Catalog Wrappers
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* This C API provides look-alike functions that deliberately resemble
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* the POSIX catopen, catclose, and catgets functions. The underlying
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* implementation is in terms of ICU resource bundles, rather than
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* POSIX message catalogs.
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* The ICU resource bundles obey standard ICU inheritance policies.
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* To facilitate this, sets and messages are flattened into one tier.
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* This is done by creating resource bundle keys of the form
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* <set_num>%<msg_num> where set_num is the set number and msg_num is
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* the message number, formatted as decimal strings.
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* Example: Consider a message catalog containing two sets:
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* Set 1: Message 4 = "Good morning."
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* Message 5 = "Good afternoon."
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* Message 7 = "Good evening."
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* Message 8 = "Good night."
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* Set 4: Message 14 = "Please "
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* Message 19 = "Thank you."
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* Message 20 = "Sincerely,"
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* The ICU resource bundle source file would, assuming it is named
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* "greet.txt", would look like this:
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* 1%4 { "Good morning." }
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* 1%5 { "Good afternoon." }
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* 1%7 { "Good evening." }
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* 1%8 { "Good night." }
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* 4%19 { "Thank you." }
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* 4%20 { "Sincerely," }
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* The catgets function is commonly used in combination with functions
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* like printf and strftime. ICU components like message format can
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* be used instead, although they use a different format syntax.
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* There is an ICU package, icuio, that provides some of
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* the POSIX-style formatting API.
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* An ICU message catalog descriptor, analogous to nl_catd.
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typedef UResourceBundle* u_nl_catd;
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* Open and return an ICU message catalog descriptor. The descriptor
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* may be passed to u_catgets() to retrieve localized strings.
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* @param name string containing the full path pointing to the
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* directory where the resources reside followed by the package name
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* e.g. "/usr/resource/my_app/resources/guimessages" on a Unix system.
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* If NULL, ICU default data files will be used.
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* Unlike POSIX, environment variables are not interpolated within the
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* @param locale the locale for which we want to open the resource. If
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* NULL, the default ICU locale will be used (see uloc_getDefault). If
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* strlen(locale) == 0, the root locale will be used.
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* @param ec input/output error code. Upon output,
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* U_USING_FALLBACK_WARNING indicates that a fallback locale was
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* used. For example, 'de_CH' was requested, but nothing was found
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* there, so 'de' was used. U_USING_DEFAULT_WARNING indicates that the
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* default locale data or root locale data was used; neither the
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* requested locale nor any of its fallback locales were found.
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* @return a message catalog descriptor that may be passed to
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* u_catgets(). If the ec parameter indicates success, then the caller
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* is responsible for calling u_catclose() to close the message
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* catalog. If the ec parameter indicates failure, then NULL will be
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U_STABLE u_nl_catd U_EXPORT2
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u_catopen(const char* name, const char* locale, UErrorCode* ec);
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* Close an ICU message catalog, given its descriptor.
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* @param catd a message catalog descriptor to be closed. May be NULL,
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* in which case no action is taken.
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U_STABLE void U_EXPORT2
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u_catclose(u_nl_catd catd);
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* Retrieve a localized string from an ICU message catalog.
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* @param catd a message catalog descriptor returned by u_catopen.
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* @param set_num the message catalog set number. Sets need not be
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* numbered consecutively.
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* @param msg_num the message catalog message number within the
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* set. Messages need not be numbered consecutively.
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* @param s the default string. This is returned if the string
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* specified by the set_num and msg_num is not found. It must be
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* @param len fill-in parameter to receive the length of the result.
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* May be NULL, in which case it is ignored.
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* @param ec input/output error code. May be U_USING_FALLBACK_WARNING
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* or U_USING_DEFAULT_WARNING. U_MISSING_RESOURCE_ERROR indicates that
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* the set_num/msg_num tuple does not specify a valid message string
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* @return a pointer to a zero-terminated UChar array which lives in
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* an internal buffer area, typically a memory mapped/DLL file. The
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* caller must NOT delete this pointer. If the call is unsuccessful
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* for any reason, then s is returned. This includes the situation in
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* which ec indicates a failing error code upon entry to this
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U_STABLE const UChar* U_EXPORT2
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u_catgets(u_nl_catd catd, int32_t set_num, int32_t msg_num,
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int32_t* len, UErrorCode* ec);