247 lines
7.8 KiB
C
247 lines
7.8 KiB
C
/*
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**********************************************************************
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* Copyright (C) 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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*
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* ucnv_err.h:
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*/
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/**
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* \file
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* \brief C UConverter predefined error callbacks
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*
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* <h2> Error Behaviour Fnctions </h2>
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* Defines some error behaviour functions called by ucnv_{from,to}Unicode
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* These are provided as part of ICU and many are stable, but they
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* can also be considered only as an example of what can be done with
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* callbacks. You may of course write your own.
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*
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* These Functions, although public, should NEVER be called directly, they should be used as parameters to
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* the ucnv_setFromUCallback and ucnv_setToUCallback functions, to
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* set the behaviour of a converter
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* when it encounters ILLEGAL/UNMAPPED/INVALID sequences.
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*
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* usage example: 'STOP' doesn't need any context, but newContext
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* could be set to something other than 'NULL' if needed.
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*
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* \code
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* UErrorCode err = U_ZERO_ERROR;
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* UConverter* myConverter = ucnv_open("ibm-949", &err);
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* void *newContext = NULL;
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* void *oldContext;
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* UConverterFromUCallback oldAction;
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*
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*
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* if (U_SUCCESS(err))
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* {
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* ucnv_setFromUCallBack(myConverter,
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* UCNV_FROM_U_CALLBACK_STOP,
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* newContext,
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* &oldAction,
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* &oldContext,
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* &status);
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* }
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* \endcode
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*
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* The code above tells "myConverter" to stop when it encounters a ILLEGAL/TRUNCATED/INVALID sequences when it is used to
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* convert from Unicode -> Codepage.
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* The behavior from Codepage to Unicode is not changed.
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*/
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/* This file isn't designed to be included all by itself. */
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#ifndef UCNV_H
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# include "unicode/ucnv.h"
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/* and the rest of this file will be ignored. */
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#endif
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#ifndef UCNV_ERR_H
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#define UCNV_ERR_H
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#include "unicode/utypes.h"
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/**
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* The process condition code to be used with the callbacks.
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*/
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typedef enum {
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UCNV_UNASSIGNED = 0, /* The code point is unassigned */
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UCNV_ILLEGAL = 1, /* The code point is illegal, for example,
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\x81\x2E is illegal in SJIS because \x2E
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is not a valid trail byte for the \x81
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lead byte. */
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UCNV_IRREGULAR = 2, /* The codepoint is not a regular sequence in
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the encoding. For example, \xC0\xE1 would
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be irregular in UTF-8 because \x61 represents
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the same character. */
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UCNV_RESET = 3, /* The callback is called with this reason when a
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'reset' has occured. Callback should reset all
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state. */
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UCNV_CLOSE = 4 /* Called when the converter is closed. The
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callback should release any allocated memory.*/
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} UConverterCallbackReason;
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/**
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* The structure for the fromUnicode callback function parameter.
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*/
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typedef struct {
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uint16_t size;
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UBool flush;
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UConverter *converter;
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const UChar *source;
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const UChar *sourceLimit;
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char *target;
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const char *targetLimit;
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int32_t *offsets; /* *offset = blah ; offset++; */
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} UConverterFromUnicodeArgs;
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/**
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* The structure for the toUnicode callback function parameter.
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*/
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typedef struct {
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uint16_t size;
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UBool flush;
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UConverter *converter;
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const char *source;
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const char *sourceLimit;
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UChar *target;
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const UChar *targetLimit;
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int32_t *offsets;
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} UConverterToUnicodeArgs;
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This From Unicode callback STOPS at the ILLEGAL_SEQUENCE,
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* returning the error code back to the caller immediately.
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_STOP (
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void *context,
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UConverterFromUnicodeArgs *fromUArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This To Unicode callback STOPS at the ILLEGAL_SEQUENCE,
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* returning the error code back to the caller immediately.
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_STOP (
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void *context,
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UConverterToUnicodeArgs *fromUArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This From Unicode callback skips any illegal sequence,
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* simply ignoring those characters.
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_SKIP (
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void *context,
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UConverterFromUnicodeArgs *fromUArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This From Unicode callback will Substitute the ILLEGAL SEQUENCE with the
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* current substitution string for the converter. This is the default
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* callback.
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* @see ucnv_setSubstChars
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_SUBSTITUTE (
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void *context,
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UConverterFromUnicodeArgs *fromUArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This From Unicode callback will Substitute the ILLEGAL SEQUENCE with the
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* hexadecimal representation of the illegal codepoints
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* (in the format %UXXXX, e.g. "%uFFFE%u00AC%uC8FE"). In the Event the
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* converter doesn't support the characters {u,%}[A-F][0-9], it will
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* substitute the illegal sequence with the substitution characters.
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* Note that percent (%) was chosen because backslash (\) does not exist
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* on many converters.
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_ESCAPE (
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void *context,
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UConverterFromUnicodeArgs *fromUArgs,
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const UChar* codeUnits,
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int32_t length,
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UChar32 codePoint,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This To Unicode callback skips any illegal sequence,
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* simply ignoring those characters.
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_SKIP (
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void *context,
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UConverterToUnicodeArgs *fromUArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This To Unicode callback will Substitute the ILLEGAL SEQUENCE with the
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* Unicode substitution character, U+FFFD.
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_SUBSTITUTE (
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void *context,
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UConverterToUnicodeArgs *fromUArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err);
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/**
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* DO NOT CALL THIS FUNCTION DIRECTLY!
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* This To Unicode callback will Substitute the ILLEGAL SEQUENCE with the
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* hexadecimal representation of the illegal bytes
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* (in the format %XNN, e.g. "%XFF%X0A%XC8%X03").
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* @stable
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*/
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U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_ESCAPE (
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void *context,
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UConverterToUnicodeArgs *fromUArgs,
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const char* codeUnits,
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int32_t length,
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UConverterCallbackReason reason,
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UErrorCode * err);
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#endif
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/*UCNV_ERR_H*/
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