/*
*****************************************************************************
*
* Copyright (C) 1998-2014, International Business Machines
* Corporation and others. All Rights Reserved.
*
*****************************************************************************
*
* ucnv_err.c
* Implements error behaviour functions called by T_UConverter_{from,to}Unicode
*
*
* Change history:
*
* 06/29/2000 helena Major rewrite of the callback APIs.
*/
#include "unicode/utypes.h"
#if !UCONFIG_NO_CONVERSION
#include "unicode/ucnv_err.h"
#include "unicode/ucnv_cb.h"
#include "ucnv_cnv.h"
#include "cmemory.h"
#include "unicode/ucnv.h"
#include "ustrfmt.h"
#define VALUE_STRING_LENGTH 32
/*Magic # 32 = 4(number of char in value string) * 8(max number of bytes per char for any converter) */
#define UNICODE_PERCENT_SIGN_CODEPOINT 0x0025
#define UNICODE_U_CODEPOINT 0x0055
#define UNICODE_X_CODEPOINT 0x0058
#define UNICODE_RS_CODEPOINT 0x005C
#define UNICODE_U_LOW_CODEPOINT 0x0075
#define UNICODE_X_LOW_CODEPOINT 0x0078
#define UNICODE_AMP_CODEPOINT 0x0026
#define UNICODE_HASH_CODEPOINT 0x0023
#define UNICODE_SEMICOLON_CODEPOINT 0x003B
#define UNICODE_PLUS_CODEPOINT 0x002B
#define UNICODE_LEFT_CURLY_CODEPOINT 0x007B
#define UNICODE_RIGHT_CURLY_CODEPOINT 0x007D
#define UNICODE_SPACE_CODEPOINT 0x0020
#define UCNV_PRV_ESCAPE_ICU 0
#define UCNV_PRV_ESCAPE_C 'C'
#define UCNV_PRV_ESCAPE_XML_DEC 'D'
#define UCNV_PRV_ESCAPE_XML_HEX 'X'
#define UCNV_PRV_ESCAPE_JAVA 'J'
#define UCNV_PRV_ESCAPE_UNICODE 'U'
#define UCNV_PRV_ESCAPE_CSS2 'S'
#define UCNV_PRV_STOP_ON_ILLEGAL 'i'
/*
* IS_DEFAULT_IGNORABLE_CODE_POINT
* This is to check if a code point has the default ignorable unicode property.
* As such, this list needs to be updated if the ignorable code point list ever
* changes.
* To avoid dependency on other code, this list is hard coded here.
* When an ignorable code point is found and is unmappable, the default callbacks
* will ignore them.
* For a list of the default ignorable code points, use this link: http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[%3ADI%3A]&g=
*
* This list should be sync with the one in CharsetCallback.java
*/
#define IS_DEFAULT_IGNORABLE_CODE_POINT(c) (\
(c == 0x00AD) || \
(c == 0x034F) || \
(c == 0x061C) || \
(c == 0x115F) || \
(c == 0x1160) || \
(0x17B4 <= c && c <= 0x17B5) || \
(0x180B <= c && c <= 0x180E) || \
(0x200B <= c && c <= 0x200F) || \
(0x202A <= c && c <= 0x202E) || \
(c == 0x2060) || \
(0x2066 <= c && c <= 0x2069) || \
(0x2061 <= c && c <= 0x2064) || \
(0x206A <= c && c <= 0x206F) || \
(c == 0x3164) || \
(0x0FE00 <= c && c <= 0x0FE0F) || \
(c == 0x0FEFF) || \
(c == 0x0FFA0) || \
(0x01BCA0 <= c && c <= 0x01BCA3) || \
(0x01D173 <= c && c <= 0x01D17A) || \
(c == 0x0E0001) || \
(0x0E0020 <= c && c <= 0x0E007F) || \
(0x0E0100 <= c && c <= 0x0E01EF) || \
(c == 0x2065) || \
(0x0FFF0 <= c && c <= 0x0FFF8) || \
(c == 0x0E0000) || \
(0x0E0002 <= c && c <= 0x0E001F) || \
(0x0E0080 <= c && c <= 0x0E00FF) || \
(0x0E01F0 <= c && c <= 0x0E0FFF) \
)
/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
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)
{
if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
{
/*
* Skip if the codepoint has unicode property of default ignorable.
*/
*err = U_ZERO_ERROR;
}
/* the caller must have set the error code accordingly */
return;
}
/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
U_CAPI void U_EXPORT2
UCNV_TO_U_CALLBACK_STOP (
const void *context,
UConverterToUnicodeArgs *toUArgs,
const char* codePoints,
int32_t length,
UConverterCallbackReason reason,
UErrorCode * err)
{
/* the caller must have set the error code accordingly */
return;
}
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)
{
if (reason <= UCNV_IRREGULAR)
{
if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
{
/*
* Skip if the codepoint has unicode property of default ignorable.
*/
*err = U_ZERO_ERROR;
}
else if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
{
*err = U_ZERO_ERROR;
}
/* else the caller must have set the error code accordingly. */
}
/* else ignore the reset, close and clone calls. */
}
U_CAPI void U_EXPORT2
UCNV_FROM_U_CALLBACK_SUBSTITUTE (
const void *context,
UConverterFromUnicodeArgs *fromArgs,
const UChar* codeUnits,
int32_t length,
UChar32 codePoint,
UConverterCallbackReason reason,
UErrorCode * err)
{
if (reason <= UCNV_IRREGULAR)
{
if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
{
/*
* Skip if the codepoint has unicode property of default ignorable.
*/
*err = U_ZERO_ERROR;
}
else if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
{
*err = U_ZERO_ERROR;
ucnv_cbFromUWriteSub(fromArgs, 0, err);
}
/* else the caller must have set the error code accordingly. */
}
/* else ignore the reset, close and clone calls. */
}
/*uses uprv_itou to get a unicode escape sequence of the offensive sequence,
*uses a clean copy (resetted) of the converter, to convert that unicode
*escape sequence to the target codepage (if conversion failure happens then
*we revert to substituting with subchar)
*/
U_CAPI void U_EXPORT2
UCNV_FROM_U_CALLBACK_ESCAPE (
const void *context,
UConverterFromUnicodeArgs *fromArgs,
const UChar *codeUnits,
int32_t length,
UChar32 codePoint,
UConverterCallbackReason reason,
UErrorCode * err)
{
UChar valueString[VALUE_STRING_LENGTH];
int32_t valueStringLength = 0;
int32_t i = 0;
const UChar *myValueSource = NULL;
UErrorCode err2 = U_ZERO_ERROR;
UConverterFromUCallback original = NULL;
const void *originalContext;
UConverterFromUCallback ignoredCallback = NULL;
const void *ignoredContext;
if (reason > UCNV_IRREGULAR)
{
return;
}
else if (reason == UCNV_UNASSIGNED && IS_DEFAULT_IGNORABLE_CODE_POINT(codePoint))
{
/*
* Skip if the codepoint has unicode property of default ignorable.
*/
*err = U_ZERO_ERROR;
return;
}
ucnv_setFromUCallBack (fromArgs->converter,
(UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE,
NULL,
&original,
&originalContext,
&err2);
if (U_FAILURE (err2))
{
*err = err2;
return;
}
if(context==NULL)
{
while (i < length)
{
valueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[i++], 16, 4);
}
}
else
{
switch(*((char*)context))
{
case UCNV_PRV_ESCAPE_JAVA:
while (i < length)
{
valueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
valueString[valueStringLength++] = (UChar) UNICODE_U_LOW_CODEPOINT; /* adding u */
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[i++], 16, 4);
}
break;
case UCNV_PRV_ESCAPE_C:
valueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
if(length==2){
valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 8);
}
else{
valueString[valueStringLength++] = (UChar) UNICODE_U_LOW_CODEPOINT; /* adding u */
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 16, 4);
}
break;
case UCNV_PRV_ESCAPE_XML_DEC:
valueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
valueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
if(length==2){
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 10, 0);
}
else{
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 10, 0);
}
valueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
break;
case UCNV_PRV_ESCAPE_XML_HEX:
valueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
valueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
valueString[valueStringLength++] = (UChar) UNICODE_X_LOW_CODEPOINT; /* adding x */
if(length==2){
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 0);
}
else{
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 16, 0);
}
valueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
break;
case UCNV_PRV_ESCAPE_UNICODE:
valueString[valueStringLength++] = (UChar) UNICODE_LEFT_CURLY_CODEPOINT; /* adding { */
valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
valueString[valueStringLength++] = (UChar) UNICODE_PLUS_CODEPOINT; /* adding + */
if (length == 2) {
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 4);
} else {
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[0], 16, 4);
}
valueString[valueStringLength++] = (UChar) UNICODE_RIGHT_CURLY_CODEPOINT; /* adding } */
break;
case UCNV_PRV_ESCAPE_CSS2:
valueString[valueStringLength++] = (UChar) UNICODE_RS_CODEPOINT; /* adding \ */
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, codePoint, 16, 0);
/* Always add space character, becase the next character might be whitespace,
which would erroneously be considered the termination of the escape sequence. */
valueString[valueStringLength++] = (UChar) UNICODE_SPACE_CODEPOINT;
break;
default:
while (i < length)
{
valueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
valueStringLength += uprv_itou (valueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint16_t)codeUnits[i++], 16, 4);
}
}
}
myValueSource = valueString;
/* reset the error */
*err = U_ZERO_ERROR;
ucnv_cbFromUWriteUChars(fromArgs, &myValueSource, myValueSource+valueStringLength, 0, err);
ucnv_setFromUCallBack (fromArgs->converter,
original,
originalContext,
&ignoredCallback,
&ignoredContext,
&err2);
if (U_FAILURE (err2))
{
*err = err2;
return;
}
return;
}
U_CAPI void U_EXPORT2
UCNV_TO_U_CALLBACK_SKIP (
const void *context,
UConverterToUnicodeArgs *toArgs,
const char* codeUnits,
int32_t length,
UConverterCallbackReason reason,
UErrorCode * err)
{
if (reason <= UCNV_IRREGULAR)
{
if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
{
*err = U_ZERO_ERROR;
}
/* else the caller must have set the error code accordingly. */
}
/* else ignore the reset, close and clone calls. */
}
U_CAPI void U_EXPORT2
UCNV_TO_U_CALLBACK_SUBSTITUTE (
const void *context,
UConverterToUnicodeArgs *toArgs,
const char* codeUnits,
int32_t length,
UConverterCallbackReason reason,
UErrorCode * err)
{
if (reason <= UCNV_IRREGULAR)
{
if (context == NULL || (*((char*)context) == UCNV_PRV_STOP_ON_ILLEGAL && reason == UCNV_UNASSIGNED))
{
*err = U_ZERO_ERROR;
ucnv_cbToUWriteSub(toArgs,0,err);
}
/* else the caller must have set the error code accordingly. */
}
/* else ignore the reset, close and clone calls. */
}
/*uses uprv_itou to get a unicode escape sequence of the offensive sequence,
*and uses that as the substitution sequence
*/
U_CAPI void U_EXPORT2
UCNV_TO_U_CALLBACK_ESCAPE (
const void *context,
UConverterToUnicodeArgs *toArgs,
const char* codeUnits,
int32_t length,
UConverterCallbackReason reason,
UErrorCode * err)
{
UChar uniValueString[VALUE_STRING_LENGTH];
int32_t valueStringLength = 0;
int32_t i = 0;
if (reason > UCNV_IRREGULAR)
{
return;
}
if(context==NULL)
{
while (i < length)
{
uniValueString[valueStringLength++] = (UChar) UNICODE_PERCENT_SIGN_CODEPOINT; /* adding % */
uniValueString[valueStringLength++] = (UChar) UNICODE_X_CODEPOINT; /* adding X */
valueStringLength += uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t) codeUnits[i++], 16, 2);
}
}
else
{
switch(*((char*)context))
{
case UCNV_PRV_ESCAPE_XML_DEC:
while (i < length)
{
uniValueString[valueStringLength++] = (UChar) UNICODE_AMP_CODEPOINT; /* adding & */
uniValueString[valueStringLength++] = (UChar) UNICODE_HASH_CODEPOINT; /* adding # */
valueStringLength += uprv_itou (uniValueString + valueStringLength, VALUE_STRING_LENGTH - valueStringLength, (uint8_t)codeUnits[i++], 10, 0);
uniValueString[valueStringLength++] = (UChar) UNICODE_SEMICOLON_CODEPOINT; /* adding ; */
}
break;
case UCNV_PRV_ESCAPE_XML_HEX:
while (i < length)
{
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