183 lines
4.6 KiB
C++
183 lines
4.6 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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*
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* Copyright (C) 1999-2004, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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******************************************************************************
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*
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* uconv_cnv.c:
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* Implements all the low level conversion functions
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* T_UnicodeConverter_{to,from}Unicode_$ConversionType
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*
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* Change history:
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*
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* 06/29/2000 helena Major rewrite of the callback APIs.
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_CONVERSION
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#include "unicode/ucnv_err.h"
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#include "unicode/ucnv.h"
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#include "unicode/uset.h"
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#include "ucnv_cnv.h"
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#include "ucnv_bld.h"
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#include "cmemory.h"
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U_CFUNC void
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ucnv_getCompleteUnicodeSet(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, 0x10ffff);
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}
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U_CFUNC void
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ucnv_getNonSurrogateUnicodeSet(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, 0xd7ff);
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sa->addRange(sa->set, 0xe000, 0x10ffff);
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}
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U_CFUNC void
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ucnv_fromUWriteBytes(UConverter *cnv,
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const char *bytes, int32_t length,
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char **target, const char *targetLimit,
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int32_t **offsets,
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int32_t sourceIndex,
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UErrorCode *pErrorCode) {
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char *t=*target;
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int32_t *o;
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/* write bytes */
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if(offsets==NULL || (o=*offsets)==NULL) {
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while(length>0 && t<targetLimit) {
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*t++=*bytes++;
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--length;
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}
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} else {
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/* output with offsets */
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while(length>0 && t<targetLimit) {
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*t++=*bytes++;
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*o++=sourceIndex;
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--length;
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}
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*offsets=o;
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}
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*target=t;
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/* write overflow */
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if(length>0) {
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if(cnv!=NULL) {
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t=(char *)cnv->charErrorBuffer;
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cnv->charErrorBufferLength=(int8_t)length;
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do {
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*t++=(uint8_t)*bytes++;
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} while(--length>0);
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}
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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}
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}
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U_CFUNC void
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ucnv_toUWriteUChars(UConverter *cnv,
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const UChar *uchars, int32_t length,
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UChar **target, const UChar *targetLimit,
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int32_t **offsets,
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int32_t sourceIndex,
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UErrorCode *pErrorCode) {
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UChar *t=*target;
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int32_t *o;
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/* write UChars */
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if(offsets==NULL || (o=*offsets)==NULL) {
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while(length>0 && t<targetLimit) {
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*t++=*uchars++;
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--length;
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}
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} else {
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/* output with offsets */
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while(length>0 && t<targetLimit) {
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*t++=*uchars++;
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*o++=sourceIndex;
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--length;
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}
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*offsets=o;
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}
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*target=t;
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/* write overflow */
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if(length>0) {
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if(cnv!=NULL) {
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t=cnv->UCharErrorBuffer;
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cnv->UCharErrorBufferLength=(int8_t)length;
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do {
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*t++=*uchars++;
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} while(--length>0);
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}
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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}
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}
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U_CFUNC void
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ucnv_toUWriteCodePoint(UConverter *cnv,
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UChar32 c,
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UChar **target, const UChar *targetLimit,
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int32_t **offsets,
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int32_t sourceIndex,
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UErrorCode *pErrorCode) {
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UChar *t;
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int32_t *o;
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t=*target;
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if(t<targetLimit) {
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if(c<=0xffff) {
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*t++=(UChar)c;
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c=U_SENTINEL;
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} else /* c is a supplementary code point */ {
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*t++=U16_LEAD(c);
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c=U16_TRAIL(c);
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if(t<targetLimit) {
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*t++=(UChar)c;
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c=U_SENTINEL;
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}
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}
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/* write offsets */
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if(offsets!=NULL && (o=*offsets)!=NULL) {
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*o++=sourceIndex;
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if((*target+1)<t) {
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*o++=sourceIndex;
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}
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*offsets=o;
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}
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}
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*target=t;
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/* write overflow from c */
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if(c>=0) {
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if(cnv!=NULL) {
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int8_t i=0;
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U16_APPEND_UNSAFE(cnv->UCharErrorBuffer, i, c);
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cnv->UCharErrorBufferLength=i;
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}
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*pErrorCode=U_BUFFER_OVERFLOW_ERROR;
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}
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}
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#endif
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