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  $   ˆl–äY>””†»€jà€¦-ÿÆ„Z|_ÃÀÈ ?÷     // Â© 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
**********************************************************************
*   Copyright (C) 1999-2009, International Business Machines
*   Corporation and others.  All Rights Reserved.
**********************************************************************
 *
 *
 *   ucnv_err.h:
 */

/**
 * \file
 * \brief C UConverter predefined error callbacks
 *
 *  <h2>Error Behaviour Functions</h2>
 *  Defines some error behaviour functions called by ucnv_{from,to}Unicode
 *  These are provided as part of ICU and many are stable, but they
 *  can also be considered only as an example of what can be done with
 *  callbacks.  You may of course write your own.
 *
 *  If you want to write your own, you may also find the functions from
 *  ucnv_cb.h useful when writing your own callbacks.
 *
 *  These functions, although public, should NEVER be called directly.
 *  They should be used as parameters to the ucnv_setFromUCallback
 *  and ucnv_setToUCallback functions, to set the behaviour of a converter
 *  when it encounters ILLEGAL/UNMAPPED/INVALID sequences.
 *
 *  usage example:  'STOP' doesn't need any context, but newContext
 *    could be set to something other than 'NULL' if needed. The available
 *    contexts in this header can modify the default behavior of the callback.
 *
 *  \code
 *  UErrorCode err = U_ZERO_ERROR;
 *  UConverter *myConverter = ucnv_open("ibm-949", &err);
 *  const void *oldContext;
 *  UConverterFromUCallback oldAction;
 *
 *
 *  if (U_SUCCESS(err))
 *  {
 *      ucnv_setFromUCallBack(myConverter,
 *                       UCNV_FROM_U_CALLBACK_STOP,
 *                       NULL,
 *                       &oldAction,
 *                       &oldContext,
 *                       &status);
 *  }
 *  \endcode
 *
 *  The code above tells "myConverter" to stop when it encounters an
 *  ILLEGAL/TRUNCATED/INVALID sequences when it is used to convert from
 *  Unicode -> Codepage. The behavior from Codepage to Unicode is not changed,
 *  and ucnv_setToUCallBack would need to be called in order to change
 *  that behavior too.
 *
 *  Here is an example with a context:
 *
 *  \code
 *  UErrorCode err = U_ZERO_ERROR;
 *  UConverter *myConverter = ucnv_open("ibm-949", &err);
 *  const void *oldContext;
 *  UConverterFromUCallback oldAction;
 *
 *
 *  if (U_SUCCESS(err))
 *  {
 *      ucnv_setToUCallBack(myConverter,
 *                       UCNV_TO_U_CALLBACK_SUBSTITUTE,
 *                       UCNV_SUB_STOP_ON_ILLEGAL,
 *                       &oldAction,
 *                       &oldContext,
 *                       &status);
 *  }
 *  \endcode
 *
 *  The code above tells "myConverter" to stop when it encounters an
 *  ILLEGAL/TRUNCATED/INVALID sequences when it is used to convert from
 *  Codepage -> Unicode. Any unmapped and legal characters will be
 *  substituted to be the default substitution character.
 */

#ifndef UCNV_ERR_H
#define UCNV_ERR_H

#include "unicode/utypes.h"

#if !UCONFIG_NO_CONVERSION

/** Forward declaring the UConverter structure. @stable ICU 2.0 */
struct UConverter;

/** @stable ICU 2.0 */
typedef struct UConverter UConverter;

/**
 * FROM_U, TO_U context options for sub callback
 * @stable ICU 2.0
 */
#define UCNV_SUB_STOP_ON_ILLEGAL "i"

/**
 * FROM_U, TO_U context options for skip callback
 * @stable ICU 2.0
 */
#define UCNV_SKIP_STOP_ON_ILLEGAL "i"

/**
 * FROM_U_CALLBACK_ESCAPE context option to escape the code unit according to ICU (%UXXXX) 
 * @stable ICU 2.0
 */
#define UCNV_ESCAPE_ICU       NULL
/**
 * FROM_U_CALLBACK_ESCAPE context option to escape the code unit according to JAVA (\\uXXXX)
 * @stable ICU 2.0
 */
#define UCNV_ESCAPE_JAVA      "J"
/**
 * FROM_U_CALLBACK_ESCAPE context option to escape the code unit according to C (\\uXXXX \\UXXXXXXXX)
 * TO_U_CALLBACK_ESCAPE option to escape the character value according to C (\\xXXXX)
 * @stable ICU 2.0
 */
#define UCNV_ESCAPE_C         "C"
/