217 lines
7.4 KiB
C
217 lines
7.4 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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* defines error behaviour functions called by T_UConverter_{from,to}Unicode
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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 T_UConverter_setMissing{Char,Unicode}Action API, to 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:
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*
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* ...
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* UErrorCode err = U_ZERO_ERROR;
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* UConverter* myConverter = T_UConverter_create("ibm-949", &err);
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*
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* if (U_SUCCESS(err))
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* {
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* T_UConverter_setMissingUnicodeAction(myConverter, (MissingUnicodeAction)UCNV_FROM_U_CALLBACK_STOP, &err);
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* T_UConverter_setMissingCharAction(myConverter, (MissingCharAction)UCNV_TO_U_CALLBACK_SUBSTITUTE, &err);
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* }
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* ...
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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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* and to substitute with a codepage specific substitutions sequence when converting from Codepage -> Unicode
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*/
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/* This file isn't designed to be included 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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* UCNV_UNASSIGNED : the code point is unassigned.
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* UCNV_ILLEGAL : The code point is illegal. For example,\x81\x2E is illegal
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* because \x2E is not a valid trail byte for the \x81 lead byte in SJIS.
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* UCNV_IRREGULAR : The code point is not a regular sequence in the encoding.
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* For example,\xC0\E1 is irregular because the same character can be represented
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* as \x61.
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* UCNV_RESET : Whether the conversion operation has been reset.
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* UCNV_CLOSE : Whether the conversion operation has ended.
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*/
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typedef enum {
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UCNV_UNASSIGNED = 0,
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UCNV_ILLEGAL = 1,
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UCNV_IRREGULAR = 2,
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UCNV_RESET = 3,
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UCNV_CLOSE = 4
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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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* Functor STOPS at the ILLEGAL_SEQUENCE
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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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* Functor STOPS at the ILLEGAL_SEQUENCE
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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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* Functor SKIPs the ILLEGAL_SEQUENCE
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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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* Functor Substitute the ILLEGAL SEQUENCE with the current substitution string assiciated with _this,
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* in the event target buffer is too small, it will store the extra info in the UConverter, and err
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* will be set to U_BUFFER_OVERFLOW_ERROR. The next time T_UConverter_fromUnicode is called, it will
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* store the left over data in target, before transcoding the "source Stream"
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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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* Functor Substitute the ILLEGAL SEQUENCE with a sequence escaped codepoints corresponding to the ILLEGAL
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* SEQUENCE (format %UXXXX, e.g. "%uFFFE%u00AC%uC8FE"). In the Event the Converter doesn't support the
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* characters {u,%}[A-F][0-9], it will substitute the illegal sequence with the substitution characters
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* (it will behave like the above functor).
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* in the event target buffer is too small, it will store the extra info in the UConverter, and err
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* will be set to U_BUFFER_OVERFLOW_ERROR. The next time T_UConverter_fromUnicode is called, it will
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* store the left over data in target, before transcoding the "source Stream"
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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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* Functor SKIPs the ILLEGAL_SEQUENCE
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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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* Functor Substitute the ILLEGAL SEQUENCE with the current substitution string assiciated with _this,
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* in the event target buffer is too small, it will store the extra info in the UConverter, and err
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* will be set to U_BUFFER_OVERFLOW_ERROR. The next time T_UConverter_fromUnicode is called, it will
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* store the left over data in target, before transcoding the "source Stream"
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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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* Functor Substitute the ILLEGAL SEQUENCE with a sequence escaped codepoints corresponding to the
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* ILLEGAL SEQUENCE (format %XNN, e.g. "%XFF%X0A%XC8%X03").
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* in the event target buffer is too small, it will store the extra info in the UConverter, and err
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* will be set to U_BUFFER_OVERFLOW_ERROR. The next time T_UConverter_fromUnicode is called, it will
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* store the left over data in target, before transcoding the "source Stream"
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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/*UCNV_ERR_H*/
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