438 lines
12 KiB
C
438 lines
12 KiB
C
/*
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*****************************************************************************
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*
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* Copyright (C) 1998-2001, 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/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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#define VALUE_STRING_LENGTH 32
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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 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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/*Takes a int32_t and fills in a UChar* string with that number "radix"-based
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* and padded with "pad" zeroes
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*/
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#define MAX_DIGITS 10
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static int32_t
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itou (UChar * buffer, uint32_t i, uint32_t radix, int32_t pad)
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{
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int32_t length = 0;
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int32_t num = 0;
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int digit;
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int32_t j;
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UChar temp;
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do{
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digit = (int)(i % radix);
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buffer[length++]=(UChar)(digit<=9?(0x0030+digit):(0x0030+digit+7));
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i=i/radix;
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} while(i);
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while (length < pad){
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buffer[length++] = (UChar) 0x0030;/*zero padding */
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}
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/* null terminate the buffer */
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if(length<MAX_DIGITS){
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buffer[length] = (UChar) 0x0000;
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}
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num= (pad>=length) ? pad :length;
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/* Reverses the string */
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for (j = 0; j < (num / 2); j++){
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temp = buffer[(length-1) - j];
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buffer[(length-1) - j] = buffer[j];
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buffer[j] = temp;
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}
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return length;
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}
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/*Function Pointer STOPS at the ILLEGAL_SEQUENCE */
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void 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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/* 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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void UCNV_TO_U_CALLBACK_STOP (
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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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return;
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}
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void 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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if(context==NULL)
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{
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if (reason <= UCNV_IRREGULAR)
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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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}
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else if(*(char*)context=='i')
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{
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if(reason != UCNV_UNASSIGNED)
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{
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/* the caller must have set
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* the error code accordingly
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*/
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return;
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}
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else
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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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}
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}
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void UCNV_FROM_U_CALLBACK_SUBSTITUTE (
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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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if(context == NULL)
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{
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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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*err = U_ZERO_ERROR;
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ucnv_cbFromUWriteSub(fromArgs, 0, err);
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return;
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}
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else if(*((char*)context)=='i')
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{
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if(reason != UCNV_UNASSIGNED)
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{
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/* the caller must have set
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* the error code accordingly
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*/
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return;
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}
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else
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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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return;
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}
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}
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}
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/*uses 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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void UCNV_FROM_U_CALLBACK_ESCAPE (
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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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void *originalContext;
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UConverterFromUCallback ignoredCallback = NULL;
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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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ucnv_setFromUCallBack (fromArgs->converter,
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(UConverterFromUCallback) UCNV_FROM_U_CALLBACK_SUBSTITUTE,
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NULL, /* To Do for HSYS: context is 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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itou (valueString + valueStringLength, codeUnits[i++], 16, 4);
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valueStringLength += 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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itou (valueString + valueStringLength, codeUnits[i++], 16, 4);
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valueStringLength += 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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UChar32 temp = UTF16_GET_PAIR_VALUE(codeUnits[0],codeUnits[1]);
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valueString[valueStringLength++] = (UChar) UNICODE_U_LOW_CODEPOINT; /* adding u */
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valueStringLength += itou (valueString + valueStringLength, temp, 16, 8);
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}
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else{
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valueString[valueStringLength++] = (UChar) UNICODE_U_CODEPOINT; /* adding U */
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valueStringLength += itou (valueString + valueStringLength, 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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UChar32 temp = UTF16_GET_PAIR_VALUE(codeUnits[0],codeUnits[1]);
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valueStringLength += itou (valueString + valueStringLength, temp, 10, 0);
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}
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else{
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valueStringLength += itou (valueString + valueStringLength, codeUnits[0], 10, 4);
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}
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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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UChar32 temp = UTF16_GET_PAIR_VALUE(codeUnits[0],codeUnits[1]);
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valueStringLength += itou (valueString + valueStringLength, temp, 16, 0);
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}
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else{
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valueStringLength += itou (valueString + valueStringLength, codeUnits[0], 16, 4);
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}
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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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itou (valueString + valueStringLength, codeUnits[i++], 16, 4);
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valueStringLength += 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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void UCNV_TO_U_CALLBACK_SKIP (
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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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if(context==NULL)
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{
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if (reason <= UCNV_IRREGULAR)
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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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}
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else if(*((char*)context)=='i')
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{
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if(reason != UCNV_UNASSIGNED)
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{
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/* the caller must have set
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* the error code accordingly
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*/
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return;
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}
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else
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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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}
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}
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void UCNV_TO_U_CALLBACK_SUBSTITUTE (
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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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if(context == NULL)
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{
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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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*err = U_ZERO_ERROR;
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ucnv_cbToUWriteSub(toArgs,0,err);
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return;
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}
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else if(*((char*)context)=='i')
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{
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if(reason != UCNV_UNASSIGNED)
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{
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/* the caller must have set
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* the error code accordingly
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*/
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return;
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}
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else
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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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return;
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}
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}
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}
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/*uses 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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void UCNV_TO_U_CALLBACK_ESCAPE (
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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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/* ### TODO:
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* This should use the new ucnv_cbWrite...() functions instead of doing
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* "tricks" as before we had a good callback API!
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* (Actually, this function is not all that bad.)
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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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itou (uniValueString + valueStringLength, (uint8_t) codeUnits[i++], 16, 2);
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valueStringLength += 2;
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}
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/* reset the error */
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*err = U_ZERO_ERROR;
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ucnv_cbToUWriteUChars(toArgs, uniValueString, valueStringLength, 0, err);
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}
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