396 lines
17 KiB
C
396 lines
17 KiB
C
/*
|
|
**********************************************************************
|
|
* Copyright (C) 1999-2001, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
**********************************************************************
|
|
*
|
|
*
|
|
* ucnv_err.h:
|
|
*/
|
|
|
|
/**
|
|
* \file
|
|
* \brief C UConverter predefined error callbacks
|
|
*
|
|
* <h2> Error Behaviour Fnctions </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.
|
|
*/
|
|
|
|
/* This file isn't designed to be included all by itself. */
|
|
#ifndef UCNV_H
|
|
# include "unicode/ucnv.h"
|
|
/* and the rest of this file will be ignored. */
|
|
#endif
|
|
|
|
#ifndef UCNV_ERR_H
|
|
#define UCNV_ERR_H
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
|
|
/**
|
|
* 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 accoding to C (\xXXXX)
|
|
* @stable ICU 2.0
|
|
*/
|
|
#define UCNV_ESCAPE_C "C"
|
|
/**
|
|
* FROM_U_CALLBACK_ESCAPE context option to escape the code unit according to XML Decimal escape (&#DDDD)
|
|
* TO_U_CALLBACK_ESCAPE context option to escape the character value accoding to XML Decimal escape (&#DDDD)
|
|
* @stable ICU 2.0
|
|
*/
|
|
#define UCNV_ESCAPE_XML_DEC "D"
|
|
/**
|
|
* FROM_U_CALLBACK_ESCAPE context option to escape the code unit according to XML Hex escape (&#xXXXX)
|
|
* TO_U_CALLBACK_ESCAPE context option to escape the character value accoding to XML Hex escape (&#xXXXX)
|
|
* @stable ICU 2.0
|
|
*/
|
|
#define UCNV_ESCAPE_XML_HEX "X"
|
|
/**
|
|
* FROM_U_CALLBACK_ESCAPE context option to escape teh code unit according to Unicode (U+XXXXX)
|
|
* @stable ICU 2.0
|
|
*/
|
|
#define UCNV_ESCAPE_UNICODE "U"
|
|
|
|
/**
|
|
* The process condition code to be used with the callbacks.
|
|
* Codes which are greater than UCNV_IRREGULAR should be
|
|
* passed on to any chained callbacks.
|
|
* @stable ICU 2.0
|
|
*/
|
|
typedef enum {
|
|
UCNV_UNASSIGNED = 0, /**< The code point is unassigned.
|
|
The error code U_INVALID_CHAR_FOUND will be set. */
|
|
UCNV_ILLEGAL = 1, /**< The code point is illegal. For example,
|
|
\x81\x2E is illegal in SJIS because \x2E
|
|
is not a valid trail byte for the \x81
|
|
lead byte.
|
|
Also, starting with Unicode 3.0.1, non-shortest byte sequences
|
|
in UTF-8 (like \xC1\xA1 instead of \x61 for U+0061)
|
|
are also illegal, not just irregular.
|
|
The error code U_ILLEGAL_CHAR_FOUND will be set. */
|
|
UCNV_IRREGULAR = 2, /**< The codepoint is not a regular sequence in
|
|
the encoding. For example, \xED\xA0\x80..\xED\xBF\xBF
|
|
are irregular UTF-8 byte sequences for single surrogate
|
|
code points.
|
|
The error code U_INVALID_CHAR_FOUND will be set. */
|
|
UCNV_RESET = 3, /**< The callback is called with this reason when a
|
|
'reset' has occured. Callback should reset all
|
|
state. */
|
|
UCNV_CLOSE = 4, /**< Called when the converter is closed. The
|
|
callback should release any allocated memory.*/
|
|
UCNV_CLONE = 5 /**< Called when ucnv_safeClone() is called on the
|
|
converter. the pointer available as the
|
|
'context' is an alias to the original converters'
|
|
context pointer. If the context must be owned
|
|
by the new converter, the callback must clone
|
|
the data and call ucnv_setFromUCallback
|
|
(or setToUCallback) with the correct pointer.
|
|
@draft ICU 2.2
|
|
*/
|
|
} UConverterCallbackReason;
|
|
|
|
|
|
/**
|
|
* The structure for the fromUnicode callback function parameter.
|
|
* @stable ICU 2.0
|
|
*/
|
|
typedef struct {
|
|
uint16_t size; /**< The size of this struct. @stable ICU 2.0 */
|
|
UBool flush; /**< The internal state of converter will be reset and data flushed if set to TRUE. @stable ICU 2.0 */
|
|
UConverter *converter; /**< Pointer to the converter that is opened and to which this struct is passed as an argument. @stable ICU 2.0 */
|
|
const UChar *source; /**< Pointer to the source source buffer. @stable ICU 2.0 */
|
|
const UChar *sourceLimit; /**< Pointer to the limit (end + 1) of source buffer. @stable ICU 2.0 */
|
|
char *target; /**< Pointer to the target buffer. @stable ICU 2.0 */
|
|
const char *targetLimit; /**< Pointer to the limit (end + 1) of target buffer. @stable ICU 2.0 */
|
|
int32_t *offsets; /**< Pointer to the buffer that recieves the offsets. *offset = blah ; offset++;. @stable ICU 2.0 */
|
|
} UConverterFromUnicodeArgs;
|
|
|
|
|
|
/**
|
|
* The structure for the toUnicode callback function parameter.
|
|
* @stable ICU 2.0
|
|
*/
|
|
typedef struct {
|
|
uint16_t size; /**< The size of this struct @stable ICU 2.0 */
|
|
UBool flush; /**< The internal state of converter will be reset and data flushed if set to TRUE. @stable ICU 2.0 */
|
|
UConverter *converter; /**< Pointer to the converter that is opened and to which this struct is passed as an argument. @stable ICU 2.0 */
|
|
const char *source; /**< Pointer to the source source buffer. @stable ICU 2.0 */
|
|
const char *sourceLimit; /**< Pointer to the limit (end + 1) of source buffer. @stable ICU 2.0 */
|
|
UChar *target; /**< Pointer to the target buffer. @stable ICU 2.0 */
|
|
const UChar *targetLimit; /**< Pointer to the limit (end + 1) of target buffer. @stable ICU 2.0 */
|
|
int32_t *offsets; /**< Pointer to the buffer that recieves the offsets. *offset = blah ; offset++;. @stable ICU 2.0 */
|
|
} UConverterToUnicodeArgs;
|
|
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This From Unicode callback STOPS at the ILLEGAL_SEQUENCE,
|
|
* returning the error code back to the caller immediately.
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_STOP (
|
|
const void *context,
|
|
UConverterFromUnicodeArgs *fromUArgs,
|
|
const UChar* codeUnits,
|
|
int32_t length,
|
|
UChar32 codePoint,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This To Unicode callback STOPS at the ILLEGAL_SEQUENCE,
|
|
* returning the error code back to the caller immediately.
|
|
*
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_STOP (
|
|
const void *context,
|
|
UConverterToUnicodeArgs *fromUArgs,
|
|
const char* codeUnits,
|
|
int32_t length,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This From Unicode callback skips any ILLEGAL_SEQUENCE, or
|
|
* skips only UNASSINGED_SEQUENCE depending on the context parameter
|
|
* simply ignoring those characters.
|
|
* @param context: the function currently recognizes the callback options:
|
|
* UCNV_SKIP_STOP_ON_ILLEGAL: STOPS at the ILLEGAL_SEQUENCE,
|
|
* returning the error code back to the caller immediately.
|
|
* NULL: Skips any ILLEGAL_SEQUENCE
|
|
*
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_SKIP (
|
|
const void *context,
|
|
UConverterFromUnicodeArgs *fromUArgs,
|
|
const UChar* codeUnits,
|
|
int32_t length,
|
|
UChar32 codePoint,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This From Unicode callback will Substitute the ILLEGAL SEQUENCE, or
|
|
* UNASSIGNED_SEQUENCE depending on context parameter, with the
|
|
* current substitution string for the converter. This is the default
|
|
* callback.
|
|
* @param context: the function currently recognizes the callback options:
|
|
* UCNV_SUB_STOP_ON_ILLEGAL: STOPS at the ILLEGAL_SEQUENCE,
|
|
* returning the error code back to the caller immediately.
|
|
* NULL: Substitutes any ILLEGAL_SEQUENCE
|
|
* @see ucnv_setSubstChars
|
|
* @stable ICU 2.0
|
|
*/
|
|
|
|
U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_SUBSTITUTE (
|
|
const void *context,
|
|
UConverterFromUnicodeArgs *fromUArgs,
|
|
const UChar* codeUnits,
|
|
int32_t length,
|
|
UChar32 codePoint,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This From Unicode callback will Substitute the ILLEGAL SEQUENCE with the
|
|
* hexadecimal representation of the illegal codepoints
|
|
*
|
|
* @param context: the function currently recognizes the callback options:
|
|
*
|
|
* UCNV_ESCAPE_ICU: Substitues the ILLEGAL SEQUENCE with the hexadecimal
|
|
* representation in the format %UXXXX, e.g. "%uFFFE%u00AC%uC8FE").
|
|
* In the Event the converter doesn't support the characters {%,U}[A-F][0-9],
|
|
* it will substitute the illegal sequence with the substitution characters.
|
|
* Note that codeUnit(32bit int eg: unit of a surrogate pair) is represented as
|
|
* %UD84D%UDC56
|
|
* UCNV_ESCAPE_JAVA: Substitues the ILLEGAL SEQUENCE with the hexadecimal
|
|
* representation in the format \uXXXX, e.g. "\uFFFE\u00AC\uC8FE").
|
|
* In the Event the converter doesn't support the characters {\,u}[A-F][0-9],
|
|
* it will substitute the illegal sequence with the substitution characters.
|
|
* Note that codeUnit(32bit int eg: unit of a surrogate pair) is represented as
|
|
* \uD84D\uDC56
|
|
* UCNV_ESCAPE_C: Substitues the ILLEGAL SEQUENCE with the hexadecimal
|
|
* representation in the format \uXXXX, e.g. "\uFFFE\u00AC\uC8FE").
|
|
* In the Event the converter doesn't support the characters {\,u,U}[A-F][0-9],
|
|
* it will substitute the illegal sequence with the substitution characters.
|
|
* Note that codeUnit(32bit int eg: unit of a surrogate pair) is represented as
|
|
* \U00023456
|
|
* UCNV_ESCAPE_XML_DEC: Substitues the ILLEGAL SEQUENCE with the decimal
|
|
* representation in the format &#DDDDDDDD, e.g. "¬죾").
|
|
* In the Event the converter doesn't support the characters {&,#}[0-9],
|
|
* it will substitute the illegal sequence with the substitution characters.
|
|
* Note that codeUnit(32bit int eg: unit of a surrogate pair) is represented as
|
|
* 𣑖 and Zero padding is ignored.
|
|
* UCNV_ESCAPE_XML_HEX:Substitues the ILLEGAL SEQUENCE with the decimal
|
|
* representation in the format &#xXXXX, e.g. "¬죾").
|
|
* In the Event the converter doesn't support the characters {&,#,x}[0-9],
|
|
* it will substitute the illegal sequence with the substitution characters.
|
|
* Note that codeUnit(32bit int eg: unit of a surrogate pair) is represented as
|
|
* 𣑖
|
|
* @stable ICU 2.0
|
|
*/
|
|
|
|
U_CAPI void U_EXPORT2 UCNV_FROM_U_CALLBACK_ESCAPE (
|
|
const void *context,
|
|
UConverterFromUnicodeArgs *fromUArgs,
|
|
const UChar* codeUnits,
|
|
int32_t length,
|
|
UChar32 codePoint,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This To Unicode callback skips any ILLEGAL_SEQUENCE, or
|
|
* skips only UNASSINGED_SEQUENCE depending on the context parameter
|
|
* simply ignoring those characters.
|
|
* @param context: the function currently recognizes the callback options:
|
|
* UCNV_SKIP_STOP_ON_ILLEGAL: STOPS at the ILLEGAL_SEQUENCE,
|
|
* returning the error code back to the caller immediately.
|
|
* NULL: Skips any ILLEGAL_SEQUENCE
|
|
*
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_SKIP (
|
|
const void *context,
|
|
UConverterToUnicodeArgs *fromUArgs,
|
|
const char* codeUnits,
|
|
int32_t length,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This To Unicode callback will Substitute the ILLEGAL SEQUENCE,or
|
|
* UNASSIGNED_SEQUENCE depending on context parameter, with the
|
|
* Unicode substitution character, U+FFFD.
|
|
* @param context: the function currently recognizes the callback options:
|
|
* UCNV_SUB_STOP_ON_ILLEGAL: STOPS at the ILLEGAL_SEQUENCE,
|
|
* returning the error code back to the caller immediately.
|
|
* NULL: Substitutes any ILLEGAL_SEQUENCE
|
|
* @stable ICU 2.0
|
|
*/
|
|
U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_SUBSTITUTE (
|
|
const void *context,
|
|
UConverterToUnicodeArgs *fromUArgs,
|
|
const char* codeUnits,
|
|
int32_t length,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
/**
|
|
* DO NOT CALL THIS FUNCTION DIRECTLY!
|
|
* This To Unicode callback will Substitute the ILLEGAL SEQUENCE with the
|
|
* hexadecimal representation of the illegal bytes
|
|
* (in the format %XNN, e.g. "%XFF%X0A%XC8%X03").
|
|
* @stable ICU 2.0
|
|
*/
|
|
|
|
U_CAPI void U_EXPORT2 UCNV_TO_U_CALLBACK_ESCAPE (
|
|
const void *context,
|
|
UConverterToUnicodeArgs *fromUArgs,
|
|
const char* codeUnits,
|
|
int32_t length,
|
|
UConverterCallbackReason reason,
|
|
UErrorCode * err);
|
|
|
|
#endif
|
|
|
|
/*UCNV_ERR_H*/
|