662 lines
22 KiB
C
662 lines
22 KiB
C
/*
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**********************************************************************
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* Copyright (C) 2000, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* file name: ucnvsbcs.cpp
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2000feb03
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* created by: Markus W. Scherer
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*
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* Change history:
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*
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* 05/09/00 helena Added implementation to handle fallback mappings.
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*/
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#include "unicode/utypes.h"
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#include "cmemory.h"
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#include "ucmp16.h"
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#include "ucmp8.h"
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#include "unicode/ucnv_bld.h"
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#include "unicode/ucnv.h"
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#include "ucnv_cnv.h"
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/* SBCS --------------------------------------------------------------------- */
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static void
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_SBCSLoad(UConverterSharedData *sharedData, const uint8_t *raw, UErrorCode *pErrorCode) {
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const uint8_t *oldraw = raw;
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sharedData->table->sbcs.toUnicode = (uint16_t*)raw;
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raw += sizeof(uint16_t)*256; oldraw = raw;
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ucmp8_initFromData(&sharedData->table->sbcs.fromUnicode, &raw, pErrorCode);
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if (sharedData->staticData->hasFromUnicodeFallback == TRUE)
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{
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if(((raw-oldraw)&3)!=0) {
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raw+=4-((raw-oldraw)&3); /* pad to 4 */
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}
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ucmp8_initFromData(&sharedData->table->sbcs.fromUnicodeFallback, &raw, pErrorCode);
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}
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if (sharedData->staticData->hasToUnicodeFallback == TRUE)
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{
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if(((raw-oldraw)&3)!=0) {
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raw+=4-((raw-oldraw)&3); /* pad to 4 */
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}
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sharedData->table->sbcs.toUnicodeFallback = (uint16_t*)raw;
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}
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}
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static void
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_SBCSUnload(UConverterSharedData *sharedData) {
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ucmp8_close (&sharedData->table->sbcs.fromUnicode);
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if (sharedData->staticData->hasFromUnicodeFallback == TRUE)
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ucmp8_close (&sharedData->table->sbcs.fromUnicodeFallback);
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uprv_free (sharedData->table);
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}
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void T_UConverter_toUnicode_SBCS (UConverter * _this,
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UChar ** target,
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const UChar * targetLimit,
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const char **source,
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const char *sourceLimit,
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int32_t *offsets,
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UBool flush,
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UErrorCode * err)
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{
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char *mySource = (char *) *source;
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UChar *myTarget = *target;
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int32_t mySourceIndex = 0;
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int32_t myTargetIndex = 0;
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int32_t targetLength = targetLimit - myTarget;
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int32_t sourceLength = sourceLimit - (char *) mySource;
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UChar *myToUnicode = NULL, *myToUnicodeFallback = NULL;
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UChar targetUniChar = 0x0000;
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myToUnicode = _this->sharedData->table->sbcs.toUnicode;
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myToUnicodeFallback = _this->sharedData->table->sbcs.toUnicodeFallback;
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while (mySourceIndex < sourceLength)
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{
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/*writing the UniChar to the output stream */
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if (myTargetIndex < targetLength)
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{
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/*gets the corresponding UniChar */
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targetUniChar = myToUnicode[(unsigned char) mySource[mySourceIndex++]];
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if (targetUniChar != missingUCharMarker)
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{
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/* writes the UniChar to the output stream */
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myTarget[myTargetIndex++] = targetUniChar;
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}
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else
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{
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if ((_this->useFallback == TRUE) &&
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(_this->sharedData->staticData->hasToUnicodeFallback == TRUE))
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{
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/* Look up in the fallback table first */
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targetUniChar = myToUnicodeFallback[(unsigned char) mySource[mySourceIndex-1]];
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if (targetUniChar != missingUCharMarker)
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{
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myTarget[myTargetIndex++] = targetUniChar;
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}
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}
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if (targetUniChar == missingUCharMarker)
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{
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*err = U_INVALID_CHAR_FOUND;
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_this->invalidCharBuffer[0] = (char) mySource[mySourceIndex - 1];
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_this->invalidCharLength = 1;
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ToU_CALLBACK_MACRO(_this,
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myTarget,
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myTargetIndex,
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targetLimit,
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mySource,
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mySourceIndex,
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sourceLimit,
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offsets,
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flush,
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err);
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if (U_FAILURE (*err)) break;
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_this->invalidCharLength = 0;
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}
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}
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}
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else
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{
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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break;
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}
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}
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*target += myTargetIndex;
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*source += mySourceIndex;
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return;
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}
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void T_UConverter_fromUnicode_SBCS (UConverter * _this,
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char **target,
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const char *targetLimit,
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const UChar ** source,
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const UChar * sourceLimit,
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int32_t *offsets,
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UBool flush,
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UErrorCode * err)
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{
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const UChar *mySource = *source;
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unsigned char *myTarget = (unsigned char *) *target;
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int32_t mySourceIndex = 0;
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int32_t myTargetIndex = 0;
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int32_t targetLength = targetLimit - (char *) myTarget;
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int32_t sourceLength = sourceLimit - mySource;
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CompactByteArray *myFromUnicode = NULL, *myFromUnicodeFallback = NULL;
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unsigned char targetChar = 0x00;
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myFromUnicode = &_this->sharedData->table->sbcs.fromUnicode;
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myFromUnicodeFallback = &_this->sharedData->table->sbcs.fromUnicodeFallback;
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/*writing the char to the output stream */
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while (mySourceIndex < sourceLength)
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{
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targetChar = ucmp8_getu (myFromUnicode, mySource[mySourceIndex]);
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if (myTargetIndex < targetLength)
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{
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mySourceIndex++;
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if (targetChar != 0 || !mySource[mySourceIndex - 1])
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{
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/*writes the char to the output stream */
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myTarget[myTargetIndex++] = targetChar;
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}
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else if ((_this->useFallback == TRUE) &&
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(_this->sharedData->staticData->hasFromUnicodeFallback == TRUE))
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{
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/* Look up in the fallback table first */
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targetChar = ucmp8_getu (myFromUnicodeFallback, mySource[mySourceIndex-1]);
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if (targetChar != 0 || !mySource[mySourceIndex - 1])
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{
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/*writes the char to the output stream */
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myTarget[myTargetIndex++] = targetChar;
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}
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}
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if (targetChar == 0 && mySource[mySourceIndex-1] != 0)
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{
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*err = U_INVALID_CHAR_FOUND;
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_this->invalidUCharBuffer[0] = (UChar)mySource[mySourceIndex - 1];
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_this->invalidUCharLength = 1;
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/* Needed explicit cast for myTarget on MVS to make compiler happy - JJD */
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FromU_CALLBACK_MACRO(_this,
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(char *)myTarget,
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myTargetIndex,
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targetLimit,
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mySource,
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mySourceIndex,
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sourceLimit,
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offsets,
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flush,
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err);
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if (U_FAILURE (*err))
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{
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break;
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}
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_this->invalidUCharLength = 0;
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}
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}
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else
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{
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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break;
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}
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}
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*target += myTargetIndex;
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*source += mySourceIndex;
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return;
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}
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UChar32 T_UConverter_getNextUChar_SBCS(UConverter* converter,
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const char** source,
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const char* sourceLimit,
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UErrorCode* err)
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{
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UChar myUChar;
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if ((*source)+1 > sourceLimit)
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{
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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return 0xFFFD;
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}
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/*Gets the corresponding codepoint*/
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myUChar = converter->sharedData->table->sbcs.toUnicode[(unsigned char)*((*source)++)];
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if (myUChar != 0xFFFD) return myUChar;
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else
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{
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UChar* myUCharPtr = &myUChar;
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const char* sourceFinal = *source;
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/* Do the fallback stuff */
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if ((converter->useFallback == TRUE)&&
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(converter->sharedData->staticData->hasToUnicodeFallback == TRUE))
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{
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myUChar = converter->sharedData->table->sbcs.toUnicodeFallback[ (unsigned char)*((*source)-1)];
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if (myUChar != 0xFFFD) return myUChar;
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}
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*err = U_INVALID_CHAR_FOUND;
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/*Calls the ErrorFunctor after rewinding the input buffer*/
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(*source)--;
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/*It's is very likely that the ErrorFunctor will write to the
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*internal buffers */
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converter->fromCharErrorBehaviour(converter,
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&myUCharPtr,
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myUCharPtr + 1,
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&sourceFinal,
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sourceLimit,
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NULL,
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TRUE,
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err);
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/*makes the internal caching transparent to the user*/
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if (*err == U_INDEX_OUTOFBOUNDS_ERROR) *err = U_ZERO_ERROR;
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return myUChar;
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}
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}
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static const UConverterImpl _SBCSImpl={
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UCNV_SBCS,
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_SBCSLoad,
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_SBCSUnload,
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NULL,
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NULL,
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NULL,
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T_UConverter_toUnicode_SBCS,
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NULL,
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T_UConverter_fromUnicode_SBCS,
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NULL,
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T_UConverter_getNextUChar_SBCS,
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NULL
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};
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/* Static data is in tools/makeconv/ucnvstat.c for data-based
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* converters. Be sure to update it as well.
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*/
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const UConverterSharedData _SBCSData={
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sizeof(UConverterSharedData), 1,
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NULL, NULL, NULL, FALSE, &_SBCSImpl,
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0
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};
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/* DBCS --------------------------------------------------------------------- */
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U_CFUNC void
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_DBCSLoad(UConverterSharedData *sharedData, const uint8_t *raw, UErrorCode *pErrorCode) {
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const uint8_t *oldraw = raw;
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ucmp16_initFromData(&sharedData->table->dbcs.toUnicode,&raw, pErrorCode);
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if(((raw-oldraw)&3)!=0) {
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raw+=4-((raw-oldraw)&3); /* pad to 4 */
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}
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oldraw = raw;
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ucmp16_initFromData(&sharedData->table->dbcs.fromUnicode, &raw, pErrorCode);
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if (sharedData->staticData->hasFromUnicodeFallback == TRUE)
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{
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if(((raw-oldraw)&3)!=0) {
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raw+=4-((raw-oldraw)&3); /* pad to 4 */
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}
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ucmp16_initFromData(&sharedData->table->dbcs.fromUnicodeFallback, &raw, pErrorCode);
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oldraw = raw;
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}
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if (sharedData->staticData->hasToUnicodeFallback == TRUE)
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{
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if(((raw-oldraw)&3)!=0) {
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raw+=4-((raw-oldraw)&3); /* pad to 4 */
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}
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ucmp16_initFromData(&sharedData->table->dbcs.toUnicodeFallback, &raw, pErrorCode);
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}
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}
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U_CFUNC void
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_DBCSUnload(UConverterSharedData *sharedData) {
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ucmp16_close (&sharedData->table->dbcs.fromUnicode);
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ucmp16_close (&sharedData->table->dbcs.toUnicode);
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if (sharedData->staticData->hasFromUnicodeFallback == TRUE)
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ucmp16_close (&sharedData->table->dbcs.fromUnicodeFallback);
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if (sharedData->staticData->hasToUnicodeFallback == TRUE)
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ucmp16_close (&sharedData->table->dbcs.toUnicodeFallback);
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uprv_free (sharedData->table);
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}
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void T_UConverter_toUnicode_DBCS (UConverter * _this,
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UChar ** target,
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const UChar * targetLimit,
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const char **source,
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const char *sourceLimit,
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int32_t *offsets,
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UBool flush,
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UErrorCode * err)
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{
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const char *mySource = ( char *) *source;
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UChar *myTarget = *target;
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int32_t mySourceIndex = 0;
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int32_t myTargetIndex = 0;
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int32_t targetLength = targetLimit - myTarget;
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int32_t sourceLength = sourceLimit - (char *) mySource;
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CompactShortArray *myToUnicode = NULL, *myToUnicodeFallback = NULL;
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UChar targetUniChar = 0x0000;
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UChar mySourceChar = 0x0000;
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myToUnicode = &_this->sharedData->table->dbcs.toUnicode;
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myToUnicodeFallback = &_this->sharedData->table->dbcs.toUnicodeFallback;
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while (mySourceIndex < sourceLength)
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{
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if (myTargetIndex < targetLength)
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{
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/*gets the corresponding UniChar */
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mySourceChar = (unsigned char) mySource[mySourceIndex++];
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/*We have no internal state, we should */
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if (_this->toUnicodeStatus == 0x00)
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{
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_this->toUnicodeStatus = (unsigned char) mySourceChar;
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}
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else
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{
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if (_this->toUnicodeStatus != 0x00)
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{
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mySourceChar = (UChar) ((_this->toUnicodeStatus << 8) | (mySourceChar & 0x00FF));
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_this->toUnicodeStatus = 0x00;
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}
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targetUniChar = (UChar) ucmp16_getu (myToUnicode, mySourceChar);
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/*writing the UniChar to the output stream */
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if (targetUniChar != missingUCharMarker)
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{
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/*writes the UniChar to the output stream */
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myTarget[myTargetIndex++] = targetUniChar;
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}
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else if ((_this->useFallback == TRUE) &&
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(_this->sharedData->staticData->hasToUnicodeFallback == TRUE))
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{
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targetUniChar = (UChar) ucmp16_getu(myToUnicodeFallback, mySourceChar);
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if (targetUniChar != missingUCharMarker)
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{
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myTarget[myTargetIndex++] = targetUniChar;
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}
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}
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if (targetUniChar == missingUCharMarker)
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{
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*err = U_INVALID_CHAR_FOUND;
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_this->invalidCharBuffer[0] = (char) (mySourceChar >> 8);
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_this->invalidCharBuffer[1] = (char) mySourceChar;
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_this->invalidCharLength = 2;
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ToU_CALLBACK_MACRO(_this,
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myTarget,
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myTargetIndex,
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targetLimit,
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mySource,
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mySourceIndex,
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sourceLimit,
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offsets,
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flush,
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err);
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if (U_FAILURE (*err)) break;
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_this->invalidCharLength = 0;
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}
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}
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}
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else
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{
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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break;
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}
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}
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/*If at the end of conversion we are still carrying state information
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*flush is TRUE, we can deduce that the input stream is truncated
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*/
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if ((flush == TRUE)
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&& (mySourceIndex == sourceLength)
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&& (_this->toUnicodeStatus != 0x00))
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{
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if (U_SUCCESS(*err))
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{
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*err = U_TRUNCATED_CHAR_FOUND;
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_this->toUnicodeStatus = 0x00;
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}
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}
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*target += myTargetIndex;
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*source += mySourceIndex;
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return;
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}
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void T_UConverter_fromUnicode_DBCS (UConverter * _this,
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char **target,
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const char *targetLimit,
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const UChar ** source,
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const UChar * sourceLimit,
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int32_t *offsets,
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UBool flush,
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UErrorCode * err)
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{
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const UChar *mySource = *source;
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unsigned char *myTarget = (unsigned char *) *target;
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int32_t mySourceIndex = 0;
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int32_t myTargetIndex = 0;
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int32_t targetLength = targetLimit - (char *) myTarget;
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int32_t sourceLength = sourceLimit - mySource;
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CompactShortArray *myFromUnicode = NULL, *myFromUnicodeFallback = NULL;
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UChar targetUniChar = 0x0000;
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UChar mySourceChar = 0x0000;
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myFromUnicode = &_this->sharedData->table->dbcs.fromUnicode;
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myFromUnicodeFallback = &_this->sharedData->table->dbcs.fromUnicodeFallback;
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/*writing the char to the output stream */
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while (mySourceIndex < sourceLength)
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{
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if (myTargetIndex < targetLength)
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{
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mySourceChar = (UChar) mySource[mySourceIndex++];
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/*Gets the corresponding codepoint */
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targetUniChar = (UChar) ucmp16_getu (myFromUnicode, mySourceChar);
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if (targetUniChar != missingCharMarker)
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{
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/*writes the char to the output stream */
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myTarget[myTargetIndex++] = (char) (targetUniChar >> 8);
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if (myTargetIndex < targetLength)
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{
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myTarget[myTargetIndex++] = (char) targetUniChar;
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}
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else
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{
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_this->charErrorBuffer[0] = (char) targetUniChar;
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_this->charErrorBufferLength = 1;
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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}
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else if ((_this->useFallback == TRUE) &&
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(_this->sharedData->staticData->hasFromUnicodeFallback == TRUE))
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{
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targetUniChar = (UChar) ucmp16_getu (myFromUnicodeFallback, mySourceChar);
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if (targetUniChar != missingCharMarker)
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{
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/*writes the char to the output stream */
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myTarget[myTargetIndex++] = (char) (targetUniChar >> 8);
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if (myTargetIndex < targetLength)
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{
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myTarget[myTargetIndex++] = (char) targetUniChar;
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}
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else
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{
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_this->charErrorBuffer[0] = (char) targetUniChar;
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_this->charErrorBufferLength = 1;
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*err = U_INDEX_OUTOFBOUNDS_ERROR;
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}
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}
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}
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if (targetUniChar == missingCharMarker)
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{
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*err = U_INVALID_CHAR_FOUND;
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|
_this->invalidUCharBuffer[0] = (UChar) mySourceChar;
|
|
_this->invalidUCharLength = 1;
|
|
|
|
|
|
/* Needed explicit cast for myTarget on MVS to make compiler happy - JJD */
|
|
FromU_CALLBACK_MACRO(_this,
|
|
(char *)myTarget,
|
|
myTargetIndex,
|
|
targetLimit,
|
|
mySource,
|
|
mySourceIndex,
|
|
sourceLimit,
|
|
offsets,
|
|
flush,
|
|
err);
|
|
|
|
if (U_FAILURE (*err)) break;
|
|
_this->invalidUCharLength = 0;
|
|
}
|
|
}
|
|
else
|
|
{
|
|
*err = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
break;
|
|
}
|
|
}
|
|
|
|
*target += myTargetIndex;
|
|
*source += mySourceIndex;;
|
|
|
|
|
|
return;
|
|
}
|
|
|
|
UChar32 T_UConverter_getNextUChar_DBCS(UConverter* converter,
|
|
const char** source,
|
|
const char* sourceLimit,
|
|
UErrorCode* err)
|
|
{
|
|
UChar myUChar;
|
|
|
|
/*Checks boundaries and set appropriate error codes*/
|
|
if ((*source)+2 > sourceLimit)
|
|
{
|
|
if ((*source) >= sourceLimit)
|
|
{
|
|
/*Either caller has reached the end of the byte stream*/
|
|
*err = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
}
|
|
else if (((*source)+1) == sourceLimit)
|
|
{
|
|
/* a character was cut in half*/
|
|
*err = U_TRUNCATED_CHAR_FOUND;
|
|
}
|
|
|
|
return 0xFFFD;
|
|
}
|
|
|
|
/*Gets the corresponding codepoint*/
|
|
myUChar = ucmp16_getu((&converter->sharedData->table->dbcs.toUnicode),
|
|
(uint16_t)(((UChar)((**source)) << 8) |((uint8_t)*((*source)+1))));
|
|
|
|
/*update the input pointer*/
|
|
*source += 2;
|
|
if (myUChar != 0xFFFD) return myUChar;
|
|
else
|
|
{
|
|
UChar* myUCharPtr = &myUChar;
|
|
const char* sourceFinal = *source;
|
|
|
|
/* rewinding the input buffer*/
|
|
(*source) -= 2;
|
|
/* Do the fallback stuff */
|
|
if ((converter->useFallback == TRUE) &&
|
|
(converter->sharedData->staticData->hasToUnicodeFallback == TRUE))
|
|
{
|
|
myUChar = ucmp16_getu((&converter->sharedData->table->dbcs.toUnicodeFallback),
|
|
(uint16_t)(((UChar)((**source)) << 8) |((uint8_t)*((*source)-1))));
|
|
if (myUChar != 0xFFFD)
|
|
{
|
|
*source += 2;
|
|
return myUChar;
|
|
}
|
|
}
|
|
|
|
*err = U_INVALID_CHAR_FOUND;
|
|
|
|
/*It's is very likely that the ErrorFunctor will write to the
|
|
*internal buffers */
|
|
converter->fromCharErrorBehaviour(converter,
|
|
&myUCharPtr,
|
|
myUCharPtr + 1,
|
|
&sourceFinal,
|
|
sourceLimit,
|
|
NULL,
|
|
TRUE,
|
|
err);
|
|
/*makes the internal caching transparent to the user*/
|
|
if (*err == U_INDEX_OUTOFBOUNDS_ERROR) *err = U_ZERO_ERROR;
|
|
|
|
return myUChar;
|
|
}
|
|
}
|
|
|
|
static const UConverterImpl _DBCSImpl={
|
|
UCNV_DBCS,
|
|
|
|
_DBCSLoad,
|
|
_DBCSUnload,
|
|
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
|
|
T_UConverter_toUnicode_DBCS,
|
|
NULL,
|
|
T_UConverter_fromUnicode_DBCS,
|
|
NULL,
|
|
T_UConverter_getNextUChar_DBCS,
|
|
|
|
NULL
|
|
};
|
|
|
|
|
|
/* Static data is in tools/makeconv/ucnvstat.c for data-based
|
|
* converters. Be sure to update it as well.
|
|
*/
|
|
|
|
const UConverterSharedData _DBCSData={
|
|
sizeof(UConverterSharedData), 1,
|
|
NULL, NULL, NULL, FALSE, &_DBCSImpl,
|
|
0, /* tounicodestatus */
|
|
};
|