708 lines
25 KiB
C
708 lines
25 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: ucnvmbcs.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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/* MBCS --------------------------------------------------------------------- */
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static void
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_MBCSLoad(UConverterSharedData *sharedData, const uint8_t *raw, UErrorCode *pErrorCode) {
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const uint8_t *oldraw;
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sharedData->table->mbcs.starters = (UBool*)raw;
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oldraw = raw += sizeof(UBool)*256;
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ucmp16_initFromData(&sharedData->table->mbcs.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->mbcs.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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oldraw = raw;
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ucmp16_initFromData(&sharedData->table->mbcs.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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ucmp16_initFromData(&sharedData->table->mbcs.toUnicodeFallback, &raw, pErrorCode);
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}
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}
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static void
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_MBCSUnload(UConverterSharedData *sharedData) {
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ucmp16_close (&sharedData->table->mbcs.fromUnicode);
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ucmp16_close (&sharedData->table->mbcs.toUnicode);
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if (sharedData->staticData->hasFromUnicodeFallback == TRUE)
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ucmp16_close (&sharedData->table->mbcs.fromUnicodeFallback);
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if (sharedData->staticData->hasToUnicodeFallback == TRUE)
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ucmp16_close (&sharedData->table->mbcs.toUnicodeFallback);
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uprv_free (sharedData->table);
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}
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static void T_UConverter_toUnicode_MBCS (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 = *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 - 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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UBool *myStarters = NULL;
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myToUnicode = &_this->sharedData->table->mbcs.toUnicode;
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myToUnicodeFallback = &_this->sharedData->table->mbcs.toUnicodeFallback;
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myStarters = _this->sharedData->table->mbcs.starters;
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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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if (myStarters[(uint8_t) mySourceChar] &&
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(_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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/*In case there is a state, we update the source char
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*by concatenating the previous char with the current
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*one
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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);
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_this->toUnicodeStatus = 0x00;
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}
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/*gets the corresponding Unicode codepoint */
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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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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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if (mySourceChar > 0xff)
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{
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_this->invalidCharLength = 2;
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_this->invalidCharBuffer[0] = (char) (mySourceChar >> 8);
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_this->invalidCharBuffer[1] = (char) mySourceChar;
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}
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else
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{
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_this->invalidCharLength = 1;
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_this->invalidCharBuffer[0] = (char) mySourceChar;
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}
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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 (_this->toUnicodeStatus
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&& (mySourceIndex == sourceLength)
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&& (flush == TRUE))
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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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static void T_UConverter_toUnicode_MBCS_OFFSETS_LOGIC (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 = *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 - 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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UChar oldMySourceChar = 0x0000;
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UBool *myStarters = NULL;
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myToUnicode = &_this->sharedData->table->mbcs.toUnicode;
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myToUnicodeFallback = &_this->sharedData->table->mbcs.toUnicodeFallback;
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myStarters = _this->sharedData->table->mbcs.starters;
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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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if (myStarters[(uint8_t) mySourceChar] &&
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(_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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/*In case there is a state, we update the source char
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*by concatenating the previous char with the current
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*one
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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);
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_this->toUnicodeStatus = 0x00;
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}
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/*gets the corresponding Unicode codepoint */
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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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{
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if (targetUniChar > 0x00FF)
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offsets[myTargetIndex] = mySourceIndex -2; /* double byte character - make the offset point to the first char */
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else
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offsets[myTargetIndex] = mySourceIndex -1 ; /* single byte char. Offset is OK */
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}
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myTarget[myTargetIndex++] = targetUniChar;
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oldMySourceChar = mySourceChar;
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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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/*writes the UniChar to the output stream */
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{
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if (targetUniChar > 0x00FF)
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offsets[myTargetIndex] = mySourceIndex -2; /* double byte character - make the offset point to the first char */
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else
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offsets[myTargetIndex] = mySourceIndex -1 ; /* single byte char. Offset is OK */
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}
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myTarget[myTargetIndex++] = targetUniChar;
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oldMySourceChar = mySourceChar;
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}
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if (targetUniChar == missingUCharMarker)
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{
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int32_t currentOffset = offsets[myTargetIndex-1] + ((oldMySourceChar>0x00FF)?2:1);
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*err = U_INVALID_CHAR_FOUND;
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if (mySourceChar > 0xff)
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{
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_this->invalidCharLength = 2;
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_this->invalidCharBuffer[0] = (char) (mySourceChar >> 8);
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_this->invalidCharBuffer[1] = (char) mySourceChar;
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}
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else
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{
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_this->invalidCharLength = 1;
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_this->invalidCharBuffer[0] = (char) mySourceChar;
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}
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ToU_CALLBACK_OFFSETS_LOGIC_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 (_this->toUnicodeStatus
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&& (mySourceIndex == sourceLength)
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&& (flush == TRUE))
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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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static void T_UConverter_fromUnicode_MBCS (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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char *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 - 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->mbcs.fromUnicode;
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myFromUnicodeFallback = &_this->sharedData->table->mbcs.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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targetUniChar = (UChar) ucmp16_getu (myFromUnicode, mySourceChar);
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if (targetUniChar != missingCharMarker)
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{
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if (targetUniChar <= 0x00FF)
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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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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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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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if (targetUniChar <= 0x00FF)
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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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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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}
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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;
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_this->invalidUCharLength = 1;
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FromU_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->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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static void T_UConverter_fromUnicode_MBCS_OFFSETS_LOGIC (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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char *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 - 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->mbcs.fromUnicode;
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myFromUnicodeFallback = &_this->sharedData->table->mbcs.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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targetUniChar = (UChar) ucmp16_getu (myFromUnicode, mySourceChar);
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if (targetUniChar != missingCharMarker)
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{
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if (targetUniChar <= 0x00FF)
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{
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offsets[myTargetIndex] = mySourceIndex-1;
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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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offsets[myTargetIndex] = mySourceIndex-1;
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myTarget[myTargetIndex++] = (char) (targetUniChar >> 8);
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if (myTargetIndex < targetLength)
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{
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offsets[myTargetIndex] = mySourceIndex-1;
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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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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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if (targetUniChar <= 0x00FF)
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{
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offsets[myTargetIndex] = mySourceIndex-1;
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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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offsets[myTargetIndex] = mySourceIndex-1;
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myTarget[myTargetIndex++] = (char) (targetUniChar >> 8);
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if (myTargetIndex < targetLength)
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{
|
|
offsets[myTargetIndex] = mySourceIndex-1;
|
|
myTarget[myTargetIndex++] = (char) targetUniChar;
|
|
}
|
|
else
|
|
{
|
|
_this->charErrorBuffer[0] = (char) targetUniChar;
|
|
_this->charErrorBufferLength = 1;
|
|
*err = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (targetUniChar == missingCharMarker)
|
|
{
|
|
int32_t currentOffset = mySourceIndex -1;
|
|
|
|
*err = U_INVALID_CHAR_FOUND;
|
|
_this->invalidUCharBuffer[0] = (UChar) mySourceChar;
|
|
_this->invalidUCharLength = 1;
|
|
|
|
FromU_CALLBACK_OFFSETS_LOGIC_MACRO(_this,
|
|
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;
|
|
}
|
|
|
|
static UChar32 T_UConverter_getNextUChar_MBCS(UConverter* converter,
|
|
const char** source,
|
|
const char* sourceLimit,
|
|
UErrorCode* err)
|
|
{
|
|
UChar myUChar;
|
|
char const *sourceInitial = *source;
|
|
/*safe keeps a ptr to the beginning in case we need to step back*/
|
|
|
|
/*Input boundary check*/
|
|
if ((*source)+1 > sourceLimit)
|
|
{
|
|
*err = U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return 0xFFFD;
|
|
}
|
|
|
|
/*Checks to see if the byte is a lead*/
|
|
if (converter->sharedData->table->mbcs.starters[(uint8_t)**source] == FALSE)
|
|
{
|
|
/*Not lead byte: we update the source ptr and get the codepoint*/
|
|
myUChar = ucmp16_getu((&converter->sharedData->table->mbcs.toUnicode),
|
|
(UChar)(**source));
|
|
if ((converter->useFallback == TRUE) &&
|
|
(converter->sharedData->staticData->hasToUnicodeFallback == TRUE) &&
|
|
(myUChar == 0xFFFD))
|
|
{
|
|
myUChar = ucmp16_getu((&converter->sharedData->table->mbcs.toUnicodeFallback),
|
|
(UChar)(**source));
|
|
}
|
|
(*source)++;
|
|
}
|
|
else
|
|
{
|
|
/*Lead byte: we Build the codepoint and get the corresponding character
|
|
* and update the source ptr*/
|
|
if ((*source + 2) > sourceLimit)
|
|
{
|
|
*err = U_TRUNCATED_CHAR_FOUND;
|
|
return 0xFFFD;
|
|
}
|
|
|
|
myUChar = ucmp16_getu((&converter->sharedData->table->mbcs.toUnicode),
|
|
(uint16_t)(((UChar)((**source)) << 8) |((uint8_t)*((*source)+1))));
|
|
|
|
if ((converter->useFallback == TRUE) &&
|
|
(converter->sharedData->staticData->hasToUnicodeFallback == TRUE) &&
|
|
(myUChar == 0xFFFD))
|
|
{
|
|
myUChar = ucmp16_getu((&converter->sharedData->table->mbcs.toUnicodeFallback),
|
|
(uint16_t)(((UChar)((**source)) << 8) |((uint8_t)*((*source)+1))));
|
|
}
|
|
(*source) += 2;
|
|
}
|
|
|
|
if (myUChar != 0xFFFD) return myUChar;
|
|
else
|
|
{
|
|
/*rewinds source*/
|
|
const char* sourceFinal = *source;
|
|
UChar* myUCharPtr = &myUChar;
|
|
|
|
*err = U_INVALID_CHAR_FOUND;
|
|
*source = sourceInitial;
|
|
|
|
/*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 void
|
|
_MBCSGetStarters(const UConverter* converter, UBool starters[256], UErrorCode *pErrorCode) {
|
|
/* fills in the starters boolean array */
|
|
uprv_memcpy(starters, converter->sharedData->table->mbcs.starters, 256*sizeof(UBool));
|
|
}
|
|
|
|
static const UConverterImpl _MBCSImpl={
|
|
UCNV_MBCS,
|
|
|
|
_MBCSLoad,
|
|
_MBCSUnload,
|
|
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
|
|
T_UConverter_toUnicode_MBCS,
|
|
T_UConverter_toUnicode_MBCS_OFFSETS_LOGIC,
|
|
T_UConverter_fromUnicode_MBCS,
|
|
T_UConverter_fromUnicode_MBCS_OFFSETS_LOGIC,
|
|
T_UConverter_getNextUChar_MBCS,
|
|
|
|
_MBCSGetStarters
|
|
};
|
|
|
|
|
|
/* Static data is in tools/makeconv/ucnvstat.c for data-based
|
|
* converters. Be sure to update it as well.
|
|
*/
|
|
|
|
const UConverterSharedData _MBCSData={
|
|
sizeof(UConverterSharedData), 1,
|
|
NULL, NULL, NULL, FALSE, &_MBCSImpl,
|
|
0
|
|
};
|