553 lines
18 KiB
C
553 lines
18 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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#include "unicode/utypes.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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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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bool_t 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;
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UChar targetUniChar = 0x0000;
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UChar mySourceChar = 0x0000;
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bool_t *myStarters = NULL;
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myToUnicode = _this->sharedData->table->mbcs.toUnicode;
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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
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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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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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bool_t 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;
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UChar targetUniChar = 0x0000;
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UChar mySourceChar = 0x0000;
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UChar oldMySourceChar;
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bool_t *myStarters = NULL;
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int32_t* originalOffsets = offsets;
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myToUnicode = _this->sharedData->table->mbcs.toUnicode;
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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
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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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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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bool_t 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;
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UChar targetUniChar = 0x0000;
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int8_t targetUniCharByteNum = 0;
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UChar mySourceChar = 0x0000;
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myFromUnicode = _this->sharedData->table->mbcs.fromUnicode;
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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
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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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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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bool_t 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;
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UChar targetUniChar = 0x0000;
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int8_t targetUniCharByteNum = 0;
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UChar mySourceChar = 0x0000;
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int32_t* originalOffsets = offsets;
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myFromUnicode = _this->sharedData->table->mbcs.fromUnicode;
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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
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{
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int32_t currentOffset = mySourceIndex -1;
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int32_t* offsetsAnchor = offsets;
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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_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->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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UChar T_UConverter_getNextUChar_MBCS(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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char const *sourceInitial = *source;
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/*safe keeps a ptr to the beginning in case we need to step back*/
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/*Input boundary check*/
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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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/*Checks to see if the byte is a lead*/
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if (converter->sharedData->table->mbcs.starters[(uint8_t)**source] == FALSE)
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{
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/*Not lead byte: we update the source ptr and get the codepoint*/
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myUChar = ucmp16_getu(converter->sharedData->table->mbcs.toUnicode,
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(UChar)(**source));
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(*source)++;
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}
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else
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{
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/*Lead byte: we Build the codepoint and get the corresponding character
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* and update the source ptr*/
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if ((*source + 2) > sourceLimit)
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{
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*err = U_TRUNCATED_CHAR_FOUND;
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return 0xFFFD;
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}
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myUChar = ucmp16_getu(converter->sharedData->table->mbcs.toUnicode,
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(uint16_t)(((UChar)((**source)) << 8) |((uint8_t)*((*source)+1))));
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(*source) += 2;
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}
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if (myUChar != 0xFFFD) return myUChar;
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else
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{
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/*rewinds source*/
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const char* sourceFinal = *source;
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UChar* myUCharPtr = &myUChar;
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*err = U_INVALID_CHAR_FOUND;
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*source = sourceInitial;
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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 UConverterImpl _MBCSImpl={
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UCNV_MBCS,
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T_UConverter_toUnicode_MBCS,
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T_UConverter_toUnicode_MBCS_OFFSETS_LOGIC,
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T_UConverter_fromUnicode_MBCS,
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T_UConverter_fromUnicode_MBCS_OFFSETS_LOGIC,
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T_UConverter_getNextUChar_MBCS
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};
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extern UConverterSharedData _MBCSData={
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sizeof(UConverterSharedData), 1,
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NULL, NULL, &_MBCSImpl, "MBCS",
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0, UCNV_IBM, UCNV_MBCS, 1, 1,
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{ 0, 1, 0, 0, 0, 0 }
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};
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