497 lines
18 KiB
C++
497 lines
18 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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*****************************************************************************
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*
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* Copyright (C) 1998-2016, 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.c
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* Implements error behaviour functions called by T_UConverter_{from,to}Unicode
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*
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*
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* Change history:
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*
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* 06/29/2000 helena Major rewrite of the callback APIs.
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_CONVERSION
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#include "unicode/ucnv_err.h"
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#include "unicode/ucnv_cb.h"
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#include "ucnv_cnv.h"
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#include "cmemory.h"
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#include "unicode/ucnv.h"
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#include "ustrfmt.h"
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#define VALUE_STRING_LENGTH 48
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/*Magic # 32 = 4(number of char in value string) * 8(max number of bytes per char for any converter) */
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#define UNICODE_PERCENT_SIGN_CODEPOINT 0x0025
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#define UNICODE_U_CODEPOINT 0x0055
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#define UNICODE_X_CODEPOINT 0x0058
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#define UNICODE_RS_CODEPOINT 0x005C
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#define UNICODE_U_LOW_CODEPOINT 0x0075
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#define UNICODE_X_LOW_CODEPOINT 0x0078
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#define UNICODE_AMP_CODEPOINT 0x0026
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#define UNICODE_HASH_CODEPOINT 0x0023
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#define UNICODE_SEMICOLON_CODEPOINT 0x003B
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#define UNICODE_PLUS_CODEPOINT 0x002B
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#define UNICODE_LEFT_CURLY_CODEPOINT 0x007B
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#define UNICODE_RIGHT_CURLY_CODEPOINT 0x007D
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#define UNICODE_SPACE_CODEPOINT 0x0020
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#define UCNV_PRV_ESCAPE_ICU 0
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#define UCNV_PRV_ESCAPE_C 'C'
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#define UCNV_PRV_ESCAPE_XML_DEC 'D'
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#define UCNV_PRV_ESCAPE_XML_HEX 'X'
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#define UCNV_PRV_ESCAPE_JAVA 'J'
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#define UCNV_PRV_ESCAPE_UNICODE 'U'
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#define UCNV_PRV_ESCAPE_CSS2 'S'
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#define UCNV_PRV_STOP_ON_ILLEGAL 'i'
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/*
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* IS_DEFAULT_IGNORABLE_CODE_POINT
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* This is to check if a code point has the default ignorable unicode property.
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* As such, this list needs to be updated if the ignorable code point list ever
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* changes.
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* To avoid dependency on other code, this list is hard coded here.
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* When an ignorable code point is found and is unmappable, the default callbacks
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* will ignore them.
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* For a list of the default ignorable code points, use this link: http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[%3ADI%3A]&g=
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*
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* This list should be sync with the one in CharsetCallback.java
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*/
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#define IS_DEFAULT_IGNORABLE_CODE_POINT(c) (\
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(c == 0x00AD) || \
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(c == 0x034F) || \
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(c == 0x061C) || \
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(c == 0x115F) || \
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(c == 0x1160) || \
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(0x17B4 <= c && c <= 0x17B5) || \
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(0x180B <= c && c <= 0x180E) || \
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(0x200B <= c && c <= 0x200F) || \
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(0x202A <= c && c <= 0x202E) || \
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(c == 0x2060) || \
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(0x2066 <= c && c <= 0x2069) || \
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(0x2061 <= c && c <= 0x2064) || \
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(0x206A <= c && c <= 0x206F) || \
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(c == 0x3164) || \
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(0x0FE00 <= c && c <= 0x0FE0F) || \
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(c == 0x0FEFF) || \
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(c == 0x0FFA0) || \
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(0x01BCA0 <= c && c <= 0x01BCA3) || \
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(0x01D173 <= c && c <= 0x01D17A) || \
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(c == 0x0E0001) || \
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(0x0E0020 <= c && c <= 0x0E007F) || \
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(0x0E0100 <= c && c <= 0x0E01EF) || \
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(c == 0x2065) || \
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(0x0FFF0 <= c && c <= 0x0FFF8) || \
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(c == 0x0E0000) || \
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(0x0E0002 <= c && c <= 0x0E001F) || \
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(0x0E0080 <= c && c <= 0x0E00FF) || \
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(0x0E01F0 <= c && c <= 0x0E0FFF) \
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)
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/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
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U_CAPI void U_EXPORT2
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UCNV_FROM_U_CALLBACK_STOP (
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const 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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(void)context;
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(void)fromUArgs;
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(void)codeUnits;
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(void)length;
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if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
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{
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/*
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* Skip if the codepoint has unicode property of default ignorable.
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*/
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*err = U_ZERO_ERROR;
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}
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/* the caller must have set the error code accordingly */
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return;
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}
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/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
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U_CAPI void U_EXPORT2
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UCNV_TO_U_CALLBACK_STOP (
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const void *context,
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UConverterToUnicodeArgs *toUArgs,
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const char* codePoints,
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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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/* the caller must have set the error code accordingly */
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(void)context; (void)toUArgs; (void)codePoints; (void)length; (void)reason; (void)err;
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return;
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}
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U_CAPI void U_EXPORT2
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UCNV_FROM_U_CALLBACK_SKIP (
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const 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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(void)fromUArgs;
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(void)codeUnits;
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(void)length;
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if (reason <= UCNV_IRREGULAR)
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{
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if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
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{
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/*
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* Skip if the codepoint has unicode property of default ignorable.
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*/
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*err = U_ZERO_ERROR;
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}
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else if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
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{
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*err = U_ZERO_ERROR;
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}
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/* else the caller must have set the error code accordingly. */
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}
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/* else ignore the reset, close and clone calls. */
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}
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U_CAPI void U_EXPORT2
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UCNV_FROM_U_CALLBACK_SUBSTITUTE (
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const void *context,
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UConverterFromUnicodeArgs *fromArgs,
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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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(void)codeUnits;
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(void)length;
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if (reason <= UCNV_IRREGULAR)
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{
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if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
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{
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/*
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* Skip if the codepoint has unicode property of default ignorable.
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*/
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*err = U_ZERO_ERROR;
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}
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else if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
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{
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*err = U_ZERO_ERROR;
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ucnv_cbFromUWriteSub(fromArgs, 0, err);
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}
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/* else the caller must have set the error code accordingly. */
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}
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/* else ignore the reset, close and clone calls. */
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}
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/*uses uprv_itou to get a unicode escape sequence of the offensive sequence,
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*uses a clean copy (resetted) of the converter, to convert that unicode
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*escape sequence to the target codepage (if conversion failure happens then
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*we revert to substituting with subchar)
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*/
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U_CAPI void U_EXPORT2
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UCNV_FROM_U_CALLBACK_ESCAPE (
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const void *context,
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UConverterFromUnicodeArgs *fromArgs,
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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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UChar valueString[VALUE_STRING_LENGTH];
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int32_t valueStringLength = 0;
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int32_t i = 0;
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const UChar *myValueSource = NULL;
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UErrorCode err2 = U_ZERO_ERROR;
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UConverterFromUCallback original = NULL;
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const void *originalContext;
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UConverterFromUCallback ignoredCallback = NULL;
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const void *ignoredContext;
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if (reason > UCNV_IRREGULAR)
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{
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return;
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}
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else if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
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{
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/*
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* Skip if the codepoint has unicode property of default ignorable.
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*/
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*err = U_ZERO_ERROR;
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return;
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}
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ucnv_setFromUCallBack (fromArgs->converter,
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(UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE,
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NULL,
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&original,
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&originalContext,
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&err2);
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if (U_FAILURE (err2))
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{
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*err = err2;
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return;
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}
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if(context==NULL)
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{
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while (i < length)
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{
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valueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
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valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[i++], 16, 4);
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}
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}
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else
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{
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switch(*((char*)context))
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{
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case UCNV_PRV_ESCAPE_JAVA:
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while (i < length)
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{
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valueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
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valueString[valueStringLength++] = (UChar) UNICODE_U_LOW_CODEPOINT; /* adding u */
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[i++], 16, 4);
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}
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break;
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case UCNV_PRV_ESCAPE_C:
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valueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
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if(length==2){
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valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 8);
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}
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else{
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valueString[valueStringLength++] = (UChar) UNICODE_U_LOW_CODEPOINT; /* adding u */
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 16, 4);
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}
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break;
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case UCNV_PRV_ESCAPE_XML_DEC:
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valueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
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valueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
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if(length==2){
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 10, 0);
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}
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else{
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 10, 0);
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}
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valueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
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break;
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case UCNV_PRV_ESCAPE_XML_HEX:
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valueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
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valueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
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valueString[valueStringLength++] = (UChar) UNICODE_X_LOW_CODEPOINT; /* adding x */
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if(length==2){
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 0);
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}
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else{
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 16, 0);
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}
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valueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
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break;
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case UCNV_PRV_ESCAPE_UNICODE:
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valueString[valueStringLength++] = (UChar) UNICODE_LEFT_CURLY_CODEPOINT; /* adding { */
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valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
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valueString[valueStringLength++] = (UChar) UNICODE_PLUS_CODEPOINT; /* adding + */
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if (length == 2) {
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 4);
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} else {
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 16, 4);
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}
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valueString[valueStringLength++] = (UChar) UNICODE_RIGHT_CURLY_CODEPOINT; /* adding } */
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break;
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case UCNV_PRV_ESCAPE_CSS2:
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valueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 0);
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/* Always add space character, becase the next character might be whitespace,
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which would erroneously be considered the termination of the escape sequence. */
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valueString[valueStringLength++] = (UChar) UNICODE_SPACE_CODEPOINT;
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break;
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default:
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while (i < length)
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{
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valueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
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valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
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valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[i++], 16, 4);
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}
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}
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}
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myValueSource = valueString;
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/* reset the error */
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*err = U_ZERO_ERROR;
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ucnv_cbFromUWriteUChars(fromArgs, &myValueSource, myValueSource+valueStringLength, 0, err);
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ucnv_setFromUCallBack (fromArgs->converter,
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original,
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originalContext,
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&ignoredCallback,
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&ignoredContext,
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&err2);
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if (U_FAILURE (err2))
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{
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*err = err2;
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return;
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}
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return;
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}
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U_CAPI void U_EXPORT2
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UCNV_TO_U_CALLBACK_SKIP (
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const void *context,
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UConverterToUnicodeArgs *toArgs,
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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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(void)toArgs;
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(void)codeUnits;
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(void)length;
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if (reason <= UCNV_IRREGULAR)
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{
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if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
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{
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*err = U_ZERO_ERROR;
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}
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/* else the caller must have set the error code accordingly. */
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}
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/* else ignore the reset, close and clone calls. */
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}
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U_CAPI void U_EXPORT2
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UCNV_TO_U_CALLBACK_SUBSTITUTE (
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const void *context,
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UConverterToUnicodeArgs *toArgs,
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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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(void)codeUnits;
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(void)length;
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if (reason <= UCNV_IRREGULAR)
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{
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if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
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{
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*err = U_ZERO_ERROR;
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ucnv_cbToUWriteSub(toArgs,0,err);
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}
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/* else the caller must have set the error code accordingly. */
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}
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/* else ignore the reset, close and clone calls. */
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}
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/*uses uprv_itou to get a unicode escape sequence of the offensive sequence,
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*and uses that as the substitution sequence
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*/
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U_CAPI void U_EXPORT2
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UCNV_TO_U_CALLBACK_ESCAPE (
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const void *context,
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UConverterToUnicodeArgs *toArgs,
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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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UChar uniValueString[VALUE_STRING_LENGTH];
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int32_t valueStringLength = 0;
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int32_t i = 0;
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if (reason > UCNV_IRREGULAR)
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{
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return;
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}
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if(context==NULL)
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{
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while (i < length)
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{
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uniValueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
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uniValueString[valueStringLength++] = (UChar) UNICODE_X_CODEPOINT; /* adding X */
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valueStringLength += uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t) codeUnits[i++], 16, 2);
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}
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}
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else
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{
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switch(*((char*)context))
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{
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case UCNV_PRV_ESCAPE_XML_DEC:
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while (i < length)
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{
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uniValueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
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uniValueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
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valueStringLength += uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t)codeUnits[i++], 10, 0);
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uniValueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
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}
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break;
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case UCNV_PRV_ESCAPE_XML_HEX:
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while (i < length)
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{
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uniValueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_X_LOW_CODEPOINT; /* adding x */
|
|
valueStringLength += uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t)codeUnits[i++], 16, 0);
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
|
|
}
|
|
break;
|
|
case UCNV_PRV_ESCAPE_C:
|
|
while (i < length)
|
|
{
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_X_LOW_CODEPOINT; /* adding x */
|
|
valueStringLength += uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t)codeUnits[i++], 16, 2);
|
|
}
|
|
break;
|
|
default:
|
|
while (i < length)
|
|
{
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
|
|
uniValueString[valueStringLength++] = (UChar) UNICODE_X_CODEPOINT; /* adding X */
|
|
uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t) codeUnits[i++], 16, 2);
|
|
valueStringLength += 2;
|
|
}
|
|
}
|
|
}
|
|
/* reset the error */
|
|
*err = U_ZERO_ERROR;
|
|
|
|
ucnv_cbToUWriteUChars(toArgs, uniValueString, valueStringLength, 0, err);
|
|
}
|
|
|
|
#endif
|