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