forked from mirrors/gecko-dev
756 lines
22 KiB
C++
756 lines
22 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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/*
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**********************************************************************
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* Copyright (C) 2000-2015, International Business Machines
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* Corporation and others. All Rights Reserved.
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**********************************************************************
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* file name: ucnvlat1.cpp
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* encoding: UTF-8
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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: 2000feb07
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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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#if !UCONFIG_NO_CONVERSION
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#include "unicode/ucnv.h"
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#include "unicode/uset.h"
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#include "unicode/utf8.h"
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#include "ucnv_bld.h"
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#include "ucnv_cnv.h"
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#include "ustr_imp.h"
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/* control optimizations according to the platform */
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#define LATIN1_UNROLL_FROM_UNICODE 1
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/* ISO 8859-1 --------------------------------------------------------------- */
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/* This is a table-less and callback-less version of ucnv_MBCSSingleToBMPWithOffsets(). */
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U_CDECL_BEGIN
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static void U_CALLCONV
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_Latin1ToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
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UErrorCode *pErrorCode) {
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const uint8_t *source;
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UChar *target;
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int32_t targetCapacity, length;
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int32_t *offsets;
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int32_t sourceIndex;
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/* set up the local pointers */
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source=(const uint8_t *)pArgs->source;
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target=pArgs->target;
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targetCapacity=(int32_t)(pArgs->targetLimit-pArgs->target);
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offsets=pArgs->offsets;
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sourceIndex=0;
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/*
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* since the conversion here is 1:1 UChar:uint8_t, we need only one counter
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* for the minimum of the sourceLength and targetCapacity
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*/
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length=(int32_t)((const uint8_t *)pArgs->sourceLimit-source);
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if(length<=targetCapacity) {
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targetCapacity=length;
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} else {
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/* target will be full */
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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length=targetCapacity;
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}
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if(targetCapacity>=8) {
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/* This loop is unrolled for speed and improved pipelining. */
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int32_t count, loops;
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loops=count=targetCapacity>>3;
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length=targetCapacity&=0x7;
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do {
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target[0]=source[0];
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target[1]=source[1];
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target[2]=source[2];
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target[3]=source[3];
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target[4]=source[4];
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target[5]=source[5];
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target[6]=source[6];
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target[7]=source[7];
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target+=8;
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source+=8;
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} while(--count>0);
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if(offsets!=NULL) {
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do {
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offsets[0]=sourceIndex++;
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offsets[1]=sourceIndex++;
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offsets[2]=sourceIndex++;
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offsets[3]=sourceIndex++;
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offsets[4]=sourceIndex++;
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offsets[5]=sourceIndex++;
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offsets[6]=sourceIndex++;
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offsets[7]=sourceIndex++;
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offsets+=8;
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} while(--loops>0);
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}
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}
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/* conversion loop */
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while(targetCapacity>0) {
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*target++=*source++;
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--targetCapacity;
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}
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/* write back the updated pointers */
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pArgs->source=(const char *)source;
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pArgs->target=target;
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/* set offsets */
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if(offsets!=NULL) {
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while(length>0) {
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*offsets++=sourceIndex++;
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--length;
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}
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pArgs->offsets=offsets;
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}
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}
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/* This is a table-less and callback-less version of ucnv_MBCSSingleGetNextUChar(). */
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static UChar32 U_CALLCONV
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_Latin1GetNextUChar(UConverterToUnicodeArgs *pArgs,
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UErrorCode *pErrorCode) {
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const uint8_t *source=(const uint8_t *)pArgs->source;
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if(source<(const uint8_t *)pArgs->sourceLimit) {
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pArgs->source=(const char *)(source+1);
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return *source;
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}
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/* no output because of empty input */
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*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
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return 0xffff;
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}
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/* This is a table-less version of ucnv_MBCSSingleFromBMPWithOffsets(). */
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static void U_CALLCONV
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_Latin1FromUnicodeWithOffsets(UConverterFromUnicodeArgs *pArgs,
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UErrorCode *pErrorCode) {
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UConverter *cnv;
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const UChar *source, *sourceLimit;
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uint8_t *target, *oldTarget;
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int32_t targetCapacity, length;
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int32_t *offsets;
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UChar32 cp;
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UChar c, max;
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int32_t sourceIndex;
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/* set up the local pointers */
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cnv=pArgs->converter;
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source=pArgs->source;
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sourceLimit=pArgs->sourceLimit;
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target=oldTarget=(uint8_t *)pArgs->target;
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targetCapacity=(int32_t)(pArgs->targetLimit-pArgs->target);
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offsets=pArgs->offsets;
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if(cnv->sharedData==&_Latin1Data) {
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max=0xff; /* Latin-1 */
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} else {
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max=0x7f; /* US-ASCII */
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}
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/* get the converter state from UConverter */
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cp=cnv->fromUChar32;
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/* sourceIndex=-1 if the current character began in the previous buffer */
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sourceIndex= cp==0 ? 0 : -1;
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/*
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* since the conversion here is 1:1 UChar:uint8_t, we need only one counter
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* for the minimum of the sourceLength and targetCapacity
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*/
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length=(int32_t)(sourceLimit-source);
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if(length<targetCapacity) {
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targetCapacity=length;
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}
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/* conversion loop */
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if(cp!=0 && targetCapacity>0) {
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goto getTrail;
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}
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#if LATIN1_UNROLL_FROM_UNICODE
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/* unroll the loop with the most common case */
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if(targetCapacity>=16) {
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int32_t count, loops;
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UChar u, oredChars;
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loops=count=targetCapacity>>4;
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do {
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oredChars=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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oredChars|=u=*source++;
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*target++=(uint8_t)u;
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/* were all 16 entries really valid? */
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if(oredChars>max) {
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/* no, return to the first of these 16 */
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source-=16;
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target-=16;
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break;
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}
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} while(--count>0);
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count=loops-count;
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targetCapacity-=16*count;
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if(offsets!=NULL) {
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oldTarget+=16*count;
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while(count>0) {
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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*offsets++=sourceIndex++;
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--count;
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}
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}
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}
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#endif
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/* conversion loop */
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c=0;
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while(targetCapacity>0 && (c=*source++)<=max) {
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/* convert the Unicode code point */
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*target++=(uint8_t)c;
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--targetCapacity;
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}
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if(c>max) {
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cp=c;
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if(!U_IS_SURROGATE(cp)) {
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/* callback(unassigned) */
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} else if(U_IS_SURROGATE_LEAD(cp)) {
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getTrail:
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if(source<sourceLimit) {
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/* test the following code unit */
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UChar trail=*source;
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if(U16_IS_TRAIL(trail)) {
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++source;
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cp=U16_GET_SUPPLEMENTARY(cp, trail);
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/* this codepage does not map supplementary code points */
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/* callback(unassigned) */
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} else {
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/* this is an unmatched lead code unit (1st surrogate) */
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/* callback(illegal) */
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}
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} else {
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/* no more input */
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cnv->fromUChar32=cp;
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goto noMoreInput;
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}
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} else {
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/* this is an unmatched trail code unit (2nd surrogate) */
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/* callback(illegal) */
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}
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*pErrorCode= U_IS_SURROGATE(cp) ? U_ILLEGAL_CHAR_FOUND : U_INVALID_CHAR_FOUND;
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cnv->fromUChar32=cp;
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}
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noMoreInput:
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/* set offsets since the start */
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if(offsets!=NULL) {
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size_t count=target-oldTarget;
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while(count>0) {
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*offsets++=sourceIndex++;
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--count;
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}
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}
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if(U_SUCCESS(*pErrorCode) && source<sourceLimit && target>=(uint8_t *)pArgs->targetLimit) {
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/* target is full */
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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}
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/* write back the updated pointers */
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pArgs->source=source;
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pArgs->target=(char *)target;
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pArgs->offsets=offsets;
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}
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/* Convert UTF-8 to Latin-1. Adapted from ucnv_SBCSFromUTF8(). */
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static void U_CALLCONV
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ucnv_Latin1FromUTF8(UConverterFromUnicodeArgs *pFromUArgs,
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UConverterToUnicodeArgs *pToUArgs,
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UErrorCode *pErrorCode) {
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UConverter *utf8;
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const uint8_t *source, *sourceLimit;
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uint8_t *target;
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int32_t targetCapacity;
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UChar32 c;
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uint8_t b, t1;
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/* set up the local pointers */
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utf8=pToUArgs->converter;
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source=(uint8_t *)pToUArgs->source;
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sourceLimit=(uint8_t *)pToUArgs->sourceLimit;
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target=(uint8_t *)pFromUArgs->target;
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targetCapacity=(int32_t)(pFromUArgs->targetLimit-pFromUArgs->target);
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/* get the converter state from the UTF-8 UConverter */
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if (utf8->toULength > 0) {
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c=(UChar32)utf8->toUnicodeStatus;
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} else {
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c = 0;
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}
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if(c!=0 && source<sourceLimit) {
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if(targetCapacity==0) {
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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return;
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} else if(c>=0xc2 && c<=0xc3 && (t1=(uint8_t)(*source-0x80)) <= 0x3f) {
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++source;
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*target++=(uint8_t)(((c&3)<<6)|t1);
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--targetCapacity;
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utf8->toUnicodeStatus=0;
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utf8->toULength=0;
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} else {
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/* complicated, illegal or unmappable input: fall back to the pivoting implementation */
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*pErrorCode=U_USING_DEFAULT_WARNING;
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return;
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}
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}
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/*
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* Make sure that the last byte sequence before sourceLimit is complete
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* or runs into a lead byte.
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* In the conversion loop compare source with sourceLimit only once
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* per multi-byte character.
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* For Latin-1, adjust sourceLimit only for 1 trail byte because
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* the conversion loop handles at most 2-byte sequences.
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*/
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if(source<sourceLimit && U8_IS_LEAD(*(sourceLimit-1))) {
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--sourceLimit;
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}
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/* conversion loop */
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while(source<sourceLimit) {
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if(targetCapacity>0) {
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b=*source++;
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if(U8_IS_SINGLE(b)) {
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/* convert ASCII */
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*target++=(uint8_t)b;
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--targetCapacity;
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} else if( /* handle U+0080..U+00FF inline */
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b>=0xc2 && b<=0xc3 &&
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(t1=(uint8_t)(*source-0x80)) <= 0x3f
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) {
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++source;
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*target++=(uint8_t)(((b&3)<<6)|t1);
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--targetCapacity;
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} else {
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/* complicated, illegal or unmappable input: fall back to the pivoting implementation */
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pToUArgs->source=(char *)(source-1);
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pFromUArgs->target=(char *)target;
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*pErrorCode=U_USING_DEFAULT_WARNING;
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return;
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}
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} else {
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/* target is full */
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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break;
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}
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}
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/*
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* The sourceLimit may have been adjusted before the conversion loop
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* to stop before a truncated sequence.
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* If so, then collect the truncated sequence now.
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* For Latin-1, there is at most exactly one lead byte because of the
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* smaller sourceLimit adjustment logic.
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*/
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if(U_SUCCESS(*pErrorCode) && source<(sourceLimit=(uint8_t *)pToUArgs->sourceLimit)) {
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utf8->toUnicodeStatus=utf8->toUBytes[0]=b=*source++;
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utf8->toULength=1;
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utf8->mode=U8_COUNT_BYTES(b);
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}
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/* write back the updated pointers */
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pToUArgs->source=(char *)source;
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pFromUArgs->target=(char *)target;
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}
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static void U_CALLCONV
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_Latin1GetUnicodeSet(const UConverter *cnv,
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const USetAdder *sa,
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UConverterUnicodeSet which,
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UErrorCode *pErrorCode) {
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(void)cnv;
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(void)which;
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(void)pErrorCode;
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sa->addRange(sa->set, 0, 0xff);
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}
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U_CDECL_END
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static const UConverterImpl _Latin1Impl={
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UCNV_LATIN_1,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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_Latin1ToUnicodeWithOffsets,
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_Latin1ToUnicodeWithOffsets,
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_Latin1FromUnicodeWithOffsets,
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_Latin1FromUnicodeWithOffsets,
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_Latin1GetNextUChar,
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NULL,
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NULL,
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NULL,
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NULL,
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_Latin1GetUnicodeSet,
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NULL,
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ucnv_Latin1FromUTF8
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};
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static const UConverterStaticData _Latin1StaticData={
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sizeof(UConverterStaticData),
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"ISO-8859-1",
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819, UCNV_IBM, UCNV_LATIN_1, 1, 1,
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{ 0x1a, 0, 0, 0 }, 1, FALSE, FALSE,
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0,
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0,
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{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
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};
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const UConverterSharedData _Latin1Data=
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UCNV_IMMUTABLE_SHARED_DATA_INITIALIZER(&_Latin1StaticData, &_Latin1Impl);
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/* US-ASCII ----------------------------------------------------------------- */
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U_CDECL_BEGIN
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/* This is a table-less version of ucnv_MBCSSingleToBMPWithOffsets(). */
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static void U_CALLCONV
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_ASCIIToUnicodeWithOffsets(UConverterToUnicodeArgs *pArgs,
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UErrorCode *pErrorCode) {
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const uint8_t *source, *sourceLimit;
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UChar *target, *oldTarget;
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int32_t targetCapacity, length;
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int32_t *offsets;
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int32_t sourceIndex;
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uint8_t c;
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/* set up the local pointers */
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source=(const uint8_t *)pArgs->source;
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sourceLimit=(const uint8_t *)pArgs->sourceLimit;
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target=oldTarget=pArgs->target;
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targetCapacity=(int32_t)(pArgs->targetLimit-pArgs->target);
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offsets=pArgs->offsets;
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/* sourceIndex=-1 if the current character began in the previous buffer */
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sourceIndex=0;
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/*
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* since the conversion here is 1:1 UChar:uint8_t, we need only one counter
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* for the minimum of the sourceLength and targetCapacity
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*/
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length=(int32_t)(sourceLimit-source);
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if(length<targetCapacity) {
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targetCapacity=length;
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}
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if(targetCapacity>=8) {
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/* This loop is unrolled for speed and improved pipelining. */
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int32_t count, loops;
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UChar oredChars;
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loops=count=targetCapacity>>3;
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do {
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oredChars=target[0]=source[0];
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oredChars|=target[1]=source[1];
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oredChars|=target[2]=source[2];
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oredChars|=target[3]=source[3];
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oredChars|=target[4]=source[4];
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oredChars|=target[5]=source[5];
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oredChars|=target[6]=source[6];
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oredChars|=target[7]=source[7];
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/* were all 16 entries really valid? */
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if(oredChars>0x7f) {
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/* no, return to the first of these 16 */
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|
break;
|
|
}
|
|
source+=8;
|
|
target+=8;
|
|
} while(--count>0);
|
|
count=loops-count;
|
|
targetCapacity-=count*8;
|
|
|
|
if(offsets!=NULL) {
|
|
oldTarget+=count*8;
|
|
while(count>0) {
|
|
offsets[0]=sourceIndex++;
|
|
offsets[1]=sourceIndex++;
|
|
offsets[2]=sourceIndex++;
|
|
offsets[3]=sourceIndex++;
|
|
offsets[4]=sourceIndex++;
|
|
offsets[5]=sourceIndex++;
|
|
offsets[6]=sourceIndex++;
|
|
offsets[7]=sourceIndex++;
|
|
offsets+=8;
|
|
--count;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* conversion loop */
|
|
c=0;
|
|
while(targetCapacity>0 && (c=*source++)<=0x7f) {
|
|
*target++=c;
|
|
--targetCapacity;
|
|
}
|
|
|
|
if(c>0x7f) {
|
|
/* callback(illegal); copy the current bytes to toUBytes[] */
|
|
UConverter *cnv=pArgs->converter;
|
|
cnv->toUBytes[0]=c;
|
|
cnv->toULength=1;
|
|
*pErrorCode=U_ILLEGAL_CHAR_FOUND;
|
|
} else if(source<sourceLimit && target>=pArgs->targetLimit) {
|
|
/* target is full */
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
|
/* set offsets since the start */
|
|
if(offsets!=NULL) {
|
|
size_t count=target-oldTarget;
|
|
while(count>0) {
|
|
*offsets++=sourceIndex++;
|
|
--count;
|
|
}
|
|
}
|
|
|
|
/* write back the updated pointers */
|
|
pArgs->source=(const char *)source;
|
|
pArgs->target=target;
|
|
pArgs->offsets=offsets;
|
|
}
|
|
|
|
/* This is a table-less version of ucnv_MBCSSingleGetNextUChar(). */
|
|
static UChar32 U_CALLCONV
|
|
_ASCIIGetNextUChar(UConverterToUnicodeArgs *pArgs,
|
|
UErrorCode *pErrorCode) {
|
|
const uint8_t *source;
|
|
uint8_t b;
|
|
|
|
source=(const uint8_t *)pArgs->source;
|
|
if(source<(const uint8_t *)pArgs->sourceLimit) {
|
|
b=*source++;
|
|
pArgs->source=(const char *)source;
|
|
if(b<=0x7f) {
|
|
return b;
|
|
} else {
|
|
UConverter *cnv=pArgs->converter;
|
|
cnv->toUBytes[0]=b;
|
|
cnv->toULength=1;
|
|
*pErrorCode=U_ILLEGAL_CHAR_FOUND;
|
|
return 0xffff;
|
|
}
|
|
}
|
|
|
|
/* no output because of empty input */
|
|
*pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR;
|
|
return 0xffff;
|
|
}
|
|
|
|
/* "Convert" UTF-8 to US-ASCII: Validate and copy. */
|
|
static void U_CALLCONV
|
|
ucnv_ASCIIFromUTF8(UConverterFromUnicodeArgs *pFromUArgs,
|
|
UConverterToUnicodeArgs *pToUArgs,
|
|
UErrorCode *pErrorCode) {
|
|
const uint8_t *source, *sourceLimit;
|
|
uint8_t *target;
|
|
int32_t targetCapacity, length;
|
|
|
|
uint8_t c;
|
|
|
|
if(pToUArgs->converter->toULength > 0) {
|
|
/* no handling of partial UTF-8 characters here, fall back to pivoting */
|
|
*pErrorCode=U_USING_DEFAULT_WARNING;
|
|
return;
|
|
}
|
|
|
|
/* set up the local pointers */
|
|
source=(const uint8_t *)pToUArgs->source;
|
|
sourceLimit=(const uint8_t *)pToUArgs->sourceLimit;
|
|
target=(uint8_t *)pFromUArgs->target;
|
|
targetCapacity=(int32_t)(pFromUArgs->targetLimit-pFromUArgs->target);
|
|
|
|
/*
|
|
* since the conversion here is 1:1 uint8_t:uint8_t, we need only one counter
|
|
* for the minimum of the sourceLength and targetCapacity
|
|
*/
|
|
length=(int32_t)(sourceLimit-source);
|
|
if(length<targetCapacity) {
|
|
targetCapacity=length;
|
|
}
|
|
|
|
/* unroll the loop with the most common case */
|
|
if(targetCapacity>=16) {
|
|
int32_t count, loops;
|
|
uint8_t oredChars;
|
|
|
|
loops=count=targetCapacity>>4;
|
|
do {
|
|
oredChars=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
oredChars|=*target++=*source++;
|
|
|
|
/* were all 16 entries really valid? */
|
|
if(oredChars>0x7f) {
|
|
/* no, return to the first of these 16 */
|
|
source-=16;
|
|
target-=16;
|
|
break;
|
|
}
|
|
} while(--count>0);
|
|
count=loops-count;
|
|
targetCapacity-=16*count;
|
|
}
|
|
|
|
/* conversion loop */
|
|
c=0;
|
|
while(targetCapacity>0 && (c=*source)<=0x7f) {
|
|
++source;
|
|
*target++=c;
|
|
--targetCapacity;
|
|
}
|
|
|
|
if(c>0x7f) {
|
|
/* non-ASCII character, handle in standard converter */
|
|
*pErrorCode=U_USING_DEFAULT_WARNING;
|
|
} else if(source<sourceLimit && target>=(const uint8_t *)pFromUArgs->targetLimit) {
|
|
/* target is full */
|
|
*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
|
|
}
|
|
|
|
/* write back the updated pointers */
|
|
pToUArgs->source=(const char *)source;
|
|
pFromUArgs->target=(char *)target;
|
|
}
|
|
|
|
static void U_CALLCONV
|
|
_ASCIIGetUnicodeSet(const UConverter *cnv,
|
|
const USetAdder *sa,
|
|
UConverterUnicodeSet which,
|
|
UErrorCode *pErrorCode) {
|
|
(void)cnv;
|
|
(void)which;
|
|
(void)pErrorCode;
|
|
sa->addRange(sa->set, 0, 0x7f);
|
|
}
|
|
U_CDECL_END
|
|
|
|
static const UConverterImpl _ASCIIImpl={
|
|
UCNV_US_ASCII,
|
|
|
|
NULL,
|
|
NULL,
|
|
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
|
|
_ASCIIToUnicodeWithOffsets,
|
|
_ASCIIToUnicodeWithOffsets,
|
|
_Latin1FromUnicodeWithOffsets,
|
|
_Latin1FromUnicodeWithOffsets,
|
|
_ASCIIGetNextUChar,
|
|
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
NULL,
|
|
_ASCIIGetUnicodeSet,
|
|
|
|
NULL,
|
|
ucnv_ASCIIFromUTF8
|
|
};
|
|
|
|
static const UConverterStaticData _ASCIIStaticData={
|
|
sizeof(UConverterStaticData),
|
|
"US-ASCII",
|
|
367, UCNV_IBM, UCNV_US_ASCII, 1, 1,
|
|
{ 0x1a, 0, 0, 0 }, 1, FALSE, FALSE,
|
|
0,
|
|
0,
|
|
{ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 } /* reserved */
|
|
};
|
|
|
|
const UConverterSharedData _ASCIIData=
|
|
UCNV_IMMUTABLE_SHARED_DATA_INITIALIZER(&_ASCIIStaticData, &_ASCIIImpl);
|
|
|
|
#endif
|