intl/icu/source/common/ucnvhz.c

Wed, 31 Dec 2014 07:22:50 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Wed, 31 Dec 2014 07:22:50 +0100
branch
TOR_BUG_3246
changeset 4
fc2d59ddac77
permissions
-rw-r--r--

Correct previous dual key logic pending first delivery installment.

     1 /*  
     2 **********************************************************************
     3 *   Copyright (C) 2000-2011, International Business Machines
     4 *   Corporation and others.  All Rights Reserved.
     5 **********************************************************************
     6 *   file name:  ucnvhz.c
     7 *   encoding:   US-ASCII
     8 *   tab size:   8 (not used)
     9 *   indentation:4
    10 *
    11 *   created on: 2000oct16
    12 *   created by: Ram Viswanadha
    13 *   10/31/2000  Ram     Implemented offsets logic function
    14 *   
    15 */
    17 #include "unicode/utypes.h"
    19 #if !UCONFIG_NO_CONVERSION && !UCONFIG_NO_LEGACY_CONVERSION
    21 #include "cmemory.h"
    22 #include "unicode/ucnv.h"
    23 #include "unicode/ucnv_cb.h"
    24 #include "unicode/uset.h"
    25 #include "unicode/utf16.h"
    26 #include "ucnv_bld.h"
    27 #include "ucnv_cnv.h"
    28 #include "ucnv_imp.h"
    30 #define UCNV_TILDE 0x7E          /* ~ */
    31 #define UCNV_OPEN_BRACE 0x7B     /* { */
    32 #define UCNV_CLOSE_BRACE 0x7D   /* } */
    33 #define SB_ESCAPE    "\x7E\x7D"
    34 #define DB_ESCAPE    "\x7E\x7B"
    35 #define TILDE_ESCAPE "\x7E\x7E"
    36 #define ESC_LEN       2
    39 #define CONCAT_ESCAPE_MACRO( args, targetIndex,targetLength,strToAppend, err, len,sourceIndex){                             \
    40     while(len-->0){                                                                                                         \
    41         if(targetIndex < targetLength){                                                                                     \
    42             args->target[targetIndex] = (unsigned char) *strToAppend;                                                       \
    43             if(args->offsets!=NULL){                                                                                        \
    44                 *(offsets++) = sourceIndex-1;                                                                               \
    45             }                                                                                                               \
    46             targetIndex++;                                                                                                  \
    47         }                                                                                                                   \
    48         else{                                                                                                               \
    49             args->converter->charErrorBuffer[(int)args->converter->charErrorBufferLength++] = (unsigned char) *strToAppend; \
    50             *err =U_BUFFER_OVERFLOW_ERROR;                                                                                  \
    51         }                                                                                                                   \
    52         strToAppend++;                                                                                                      \
    53     }                                                                                                                       \
    54 }
    57 typedef struct{
    58     UConverter* gbConverter;
    59     int32_t targetIndex;
    60     int32_t sourceIndex;
    61     UBool isEscapeAppended;
    62     UBool isStateDBCS;
    63     UBool isTargetUCharDBCS;
    64     UBool isEmptySegment;
    65 }UConverterDataHZ;
    69 static void 
    70 _HZOpen(UConverter *cnv, UConverterLoadArgs *pArgs, UErrorCode *errorCode){
    71     UConverter *gbConverter;
    72     if(pArgs->onlyTestIsLoadable) {
    73         ucnv_canCreateConverter("GBK", errorCode);  /* errorCode carries result */
    74         return;
    75     }
    76     gbConverter = ucnv_open("GBK", errorCode);
    77     if(U_FAILURE(*errorCode)) {
    78         return;
    79     }
    80     cnv->toUnicodeStatus = 0;
    81     cnv->fromUnicodeStatus= 0;
    82     cnv->mode=0;
    83     cnv->fromUChar32=0x0000;
    84     cnv->extraInfo = uprv_calloc(1, sizeof(UConverterDataHZ));
    85     if(cnv->extraInfo != NULL){
    86         ((UConverterDataHZ*)cnv->extraInfo)->gbConverter = gbConverter;
    87     }
    88     else {
    89         ucnv_close(gbConverter);
    90         *errorCode = U_MEMORY_ALLOCATION_ERROR;
    91         return;
    92     }
    93 }
    95 static void 
    96 _HZClose(UConverter *cnv){
    97     if(cnv->extraInfo != NULL) {
    98         ucnv_close (((UConverterDataHZ *) (cnv->extraInfo))->gbConverter);
    99         if(!cnv->isExtraLocal) {
   100             uprv_free(cnv->extraInfo);
   101         }
   102         cnv->extraInfo = NULL;
   103     }
   104 }
   106 static void 
   107 _HZReset(UConverter *cnv, UConverterResetChoice choice){
   108     if(choice<=UCNV_RESET_TO_UNICODE) {
   109         cnv->toUnicodeStatus = 0;
   110         cnv->mode=0;
   111         if(cnv->extraInfo != NULL){
   112             ((UConverterDataHZ*)cnv->extraInfo)->isStateDBCS = FALSE;
   113             ((UConverterDataHZ*)cnv->extraInfo)->isEmptySegment = FALSE;
   114         }
   115     }
   116     if(choice!=UCNV_RESET_TO_UNICODE) {
   117         cnv->fromUnicodeStatus= 0;
   118         cnv->fromUChar32=0x0000; 
   119         if(cnv->extraInfo != NULL){
   120             ((UConverterDataHZ*)cnv->extraInfo)->isEscapeAppended = FALSE;
   121             ((UConverterDataHZ*)cnv->extraInfo)->targetIndex = 0;
   122             ((UConverterDataHZ*)cnv->extraInfo)->sourceIndex = 0;
   123             ((UConverterDataHZ*)cnv->extraInfo)->isTargetUCharDBCS = FALSE;
   124         }
   125     }
   126 }
   128 /**************************************HZ Encoding*************************************************
   129 * Rules for HZ encoding
   130 * 
   131 *   In ASCII mode, a byte is interpreted as an ASCII character, unless a
   132 *   '~' is encountered. The character '~' is an escape character. By
   133 *   convention, it must be immediately followed ONLY by '~', '{' or '\n'
   134 *   (<LF>), with the following special meaning.
   136 *   1. The escape sequence '~~' is interpreted as a '~'.
   137 *   2. The escape-to-GB sequence '~{' switches the mode from ASCII to GB.
   138 *   3. The escape sequence '~\n' is a line-continuation marker to be
   139 *     consumed with no output produced.
   140 *   In GB mode, characters are interpreted two bytes at a time as (pure)
   141 *   GB codes until the escape-from-GB code '~}' is read. This code
   142 *   switches the mode from GB back to ASCII.  (Note that the escape-
   143 *   from-GB code '~}' ($7E7D) is outside the defined GB range.)
   144 *
   145 *   Source: RFC 1842
   146 *
   147 *   Note that the formal syntax in RFC 1842 is invalid. I assume that the
   148 *   intended definition of single-byte-segment is as follows (pedberg):
   149 *   single-byte-segment = single-byte-seq 1*single-byte-char
   150 */
   153 static void 
   154 UConverter_toUnicode_HZ_OFFSETS_LOGIC(UConverterToUnicodeArgs *args,
   155                                                             UErrorCode* err){
   156     char tempBuf[2];
   157     const char *mySource = ( char *) args->source;
   158     UChar *myTarget = args->target;
   159     const char *mySourceLimit = args->sourceLimit;
   160     UChar32 targetUniChar = 0x0000;
   161     int32_t mySourceChar = 0x0000;
   162     UConverterDataHZ* myData=(UConverterDataHZ*)(args->converter->extraInfo);
   163     tempBuf[0]=0; 
   164     tempBuf[1]=0;
   166     /* Calling code already handles this situation. */
   167     /*if ((args->converter == NULL) || (args->targetLimit < args->target) || (mySourceLimit < args->source)){
   168         *err = U_ILLEGAL_ARGUMENT_ERROR;
   169         return;
   170     }*/
   172     while(mySource< mySourceLimit){
   174         if(myTarget < args->targetLimit){
   176             mySourceChar= (unsigned char) *mySource++;
   178             if(args->converter->mode == UCNV_TILDE) {
   179                 /* second byte after ~ */
   180                 args->converter->mode=0;
   181                 switch(mySourceChar) {
   182                 case 0x0A:
   183                     /* no output for ~\n (line-continuation marker) */
   184                     continue;
   185                 case UCNV_TILDE:
   186                     if(args->offsets) {
   187                         args->offsets[myTarget - args->target]=(int32_t)(mySource - args->source - 2);
   188                     }
   189                     *(myTarget++)=(UChar)mySourceChar;
   190                     myData->isEmptySegment = FALSE;
   191                     continue;
   192                 case UCNV_OPEN_BRACE:
   193                 case UCNV_CLOSE_BRACE:
   194                     myData->isStateDBCS = (mySourceChar == UCNV_OPEN_BRACE);
   195                     if (myData->isEmptySegment) {
   196                         myData->isEmptySegment = FALSE; /* we are handling it, reset to avoid future spurious errors */
   197                         *err = U_ILLEGAL_ESCAPE_SEQUENCE;
   198                         args->converter->toUCallbackReason = UCNV_IRREGULAR;
   199                         args->converter->toUBytes[0] = UCNV_TILDE;
   200                         args->converter->toUBytes[1] = mySourceChar;
   201                         args->converter->toULength = 2;
   202                         args->target = myTarget;
   203                         args->source = mySource;
   204                         return;
   205                     }
   206                     myData->isEmptySegment = TRUE;
   207                     continue;
   208                 default:
   209                      /* if the first byte is equal to TILDE and the trail byte
   210                      * is not a valid byte then it is an error condition
   211                      */
   212                     /*
   213                      * Ticket 5691: consistent illegal sequences:
   214                      * - We include at least the first byte in the illegal sequence.
   215                      * - If any of the non-initial bytes could be the start of a character,
   216                      *   we stop the illegal sequence before the first one of those.
   217                      */
   218                     myData->isEmptySegment = FALSE; /* different error here, reset this to avoid spurious future error */
   219                     *err = U_ILLEGAL_ESCAPE_SEQUENCE;
   220                     args->converter->toUBytes[0] = UCNV_TILDE;
   221                     if( myData->isStateDBCS ?
   222                             (0x21 <= mySourceChar && mySourceChar <= 0x7e) :
   223                             mySourceChar <= 0x7f
   224                     ) {
   225                         /* The current byte could be the start of a character: Back it out. */
   226                         args->converter->toULength = 1;
   227                         --mySource;
   228                     } else {
   229                         /* Include the current byte in the illegal sequence. */
   230                         args->converter->toUBytes[1] = mySourceChar;
   231                         args->converter->toULength = 2;
   232                     }
   233                     args->target = myTarget;
   234                     args->source = mySource;
   235                     return;
   236                 }
   237             } else if(myData->isStateDBCS) {
   238                 if(args->converter->toUnicodeStatus == 0x00){
   239                     /* lead byte */
   240                     if(mySourceChar == UCNV_TILDE) {
   241                         args->converter->mode = UCNV_TILDE;
   242                     } else {
   243                         /* add another bit to distinguish a 0 byte from not having seen a lead byte */
   244                         args->converter->toUnicodeStatus = (uint32_t) (mySourceChar | 0x100);
   245                         myData->isEmptySegment = FALSE; /* the segment has something, either valid or will produce a different error, so reset this */
   246                     }
   247                     continue;
   248                 }
   249                 else{
   250                     /* trail byte */
   251                     int leadIsOk, trailIsOk;
   252                     uint32_t leadByte = args->converter->toUnicodeStatus & 0xff;
   253                     targetUniChar = 0xffff;
   254                     /*
   255                      * Ticket 5691: consistent illegal sequences:
   256                      * - We include at least the first byte in the illegal sequence.
   257                      * - If any of the non-initial bytes could be the start of a character,
   258                      *   we stop the illegal sequence before the first one of those.
   259                      *
   260                      * In HZ DBCS, if the second byte is in the 21..7e range,
   261                      * we report only the first byte as the illegal sequence.
   262                      * Otherwise we convert or report the pair of bytes.
   263                      */
   264                     leadIsOk = (uint8_t)(leadByte - 0x21) <= (0x7d - 0x21);
   265                     trailIsOk = (uint8_t)(mySourceChar - 0x21) <= (0x7e - 0x21);
   266                     if (leadIsOk && trailIsOk) {
   267                         tempBuf[0] = (char) (leadByte+0x80) ;
   268                         tempBuf[1] = (char) (mySourceChar+0x80);
   269                         targetUniChar = ucnv_MBCSSimpleGetNextUChar(myData->gbConverter->sharedData,
   270                             tempBuf, 2, args->converter->useFallback);
   271                         mySourceChar= (leadByte << 8) | mySourceChar;
   272                     } else if (trailIsOk) {
   273                         /* report a single illegal byte and continue with the following DBCS starter byte */
   274                         --mySource;
   275                         mySourceChar = (int32_t)leadByte;
   276                     } else {
   277                         /* report a pair of illegal bytes if the second byte is not a DBCS starter */
   278                         /* add another bit so that the code below writes 2 bytes in case of error */
   279                         mySourceChar= 0x10000 | (leadByte << 8) | mySourceChar;
   280                     }
   281                     args->converter->toUnicodeStatus =0x00;
   282                 }
   283             }
   284             else{
   285                 if(mySourceChar == UCNV_TILDE) {
   286                     args->converter->mode = UCNV_TILDE;
   287                     continue;
   288                 } else if(mySourceChar <= 0x7f) {
   289                     targetUniChar = (UChar)mySourceChar;  /* ASCII */
   290                     myData->isEmptySegment = FALSE; /* the segment has something valid */
   291                 } else {
   292                     targetUniChar = 0xffff;
   293                     myData->isEmptySegment = FALSE; /* different error here, reset this to avoid spurious future error */
   294                 }
   295             }
   296             if(targetUniChar < 0xfffe){
   297                 if(args->offsets) {
   298                     args->offsets[myTarget - args->target]=(int32_t)(mySource - args->source - 1-(myData->isStateDBCS));
   299                 }
   301                 *(myTarget++)=(UChar)targetUniChar;
   302             }
   303             else /* targetUniChar>=0xfffe */ {
   304                 if(targetUniChar == 0xfffe){
   305                     *err = U_INVALID_CHAR_FOUND;
   306                 }
   307                 else{
   308                     *err = U_ILLEGAL_CHAR_FOUND;
   309                 }
   310                 if(mySourceChar > 0xff){
   311                     args->converter->toUBytes[0] = (uint8_t)(mySourceChar >> 8);
   312                     args->converter->toUBytes[1] = (uint8_t)mySourceChar;
   313                     args->converter->toULength=2;
   314                 }
   315                 else{
   316                     args->converter->toUBytes[0] = (uint8_t)mySourceChar;
   317                     args->converter->toULength=1;
   318                 }
   319                 break;
   320             }
   321         }
   322         else{
   323             *err =U_BUFFER_OVERFLOW_ERROR;
   324             break;
   325         }
   326     }
   328     args->target = myTarget;
   329     args->source = mySource;
   330 }
   333 static void 
   334 UConverter_fromUnicode_HZ_OFFSETS_LOGIC (UConverterFromUnicodeArgs * args,
   335                                                       UErrorCode * err){
   336     const UChar *mySource = args->source;
   337     char *myTarget = args->target;
   338     int32_t* offsets = args->offsets;
   339     int32_t mySourceIndex = 0;
   340     int32_t myTargetIndex = 0;
   341     int32_t targetLength = (int32_t)(args->targetLimit - myTarget);
   342     int32_t mySourceLength = (int32_t)(args->sourceLimit - args->source);
   343     int32_t length=0;
   344     uint32_t targetUniChar = 0x0000;
   345     UChar32 mySourceChar = 0x0000;
   346     UConverterDataHZ *myConverterData=(UConverterDataHZ*)args->converter->extraInfo;
   347     UBool isTargetUCharDBCS = (UBool) myConverterData->isTargetUCharDBCS;
   348     UBool oldIsTargetUCharDBCS = isTargetUCharDBCS;
   349     int len =0;
   350     const char* escSeq=NULL;
   352     /* Calling code already handles this situation. */
   353     /*if ((args->converter == NULL) || (args->targetLimit < myTarget) || (args->sourceLimit < args->source)){
   354         *err = U_ILLEGAL_ARGUMENT_ERROR;
   355         return;
   356     }*/
   357     if(args->converter->fromUChar32!=0 && myTargetIndex < targetLength) {
   358         goto getTrail;
   359     }
   360     /*writing the char to the output stream */
   361     while (mySourceIndex < mySourceLength){
   362         targetUniChar = missingCharMarker;
   363         if (myTargetIndex < targetLength){
   365             mySourceChar = (UChar) mySource[mySourceIndex++];
   368             oldIsTargetUCharDBCS = isTargetUCharDBCS;
   369             if(mySourceChar ==UCNV_TILDE){
   370                 /*concatEscape(args, &myTargetIndex, &targetLength,"\x7E\x7E",err,2,&mySourceIndex);*/
   371                 len = ESC_LEN;
   372                 escSeq = TILDE_ESCAPE;
   373                 CONCAT_ESCAPE_MACRO(args, myTargetIndex, targetLength, escSeq,err,len,mySourceIndex);
   374                 continue;
   375             } else if(mySourceChar <= 0x7f) {
   376                 length = 1;
   377                 targetUniChar = mySourceChar;
   378             } else {
   379                 length= ucnv_MBCSFromUChar32(myConverterData->gbConverter->sharedData,
   380                     mySourceChar,&targetUniChar,args->converter->useFallback);
   381                 /* we can only use lead bytes 21..7D and trail bytes 21..7E */
   382                 if( length == 2 &&
   383                     (uint16_t)(targetUniChar - 0xa1a1) <= (0xfdfe - 0xa1a1) &&
   384                     (uint8_t)(targetUniChar - 0xa1) <= (0xfe - 0xa1)
   385                 ) {
   386                     targetUniChar -= 0x8080;
   387                 } else {
   388                     targetUniChar = missingCharMarker;
   389                 }
   390             }
   391             if (targetUniChar != missingCharMarker){
   392                myConverterData->isTargetUCharDBCS = isTargetUCharDBCS = (UBool)(targetUniChar>0x00FF);     
   393                  if(oldIsTargetUCharDBCS != isTargetUCharDBCS || !myConverterData->isEscapeAppended ){
   394                     /*Shifting from a double byte to single byte mode*/
   395                     if(!isTargetUCharDBCS){
   396                         len =ESC_LEN;
   397                         escSeq = SB_ESCAPE;
   398                         CONCAT_ESCAPE_MACRO(args, myTargetIndex, targetLength, escSeq,err,len,mySourceIndex);
   399                         myConverterData->isEscapeAppended = TRUE;
   400                     }
   401                     else{ /* Shifting from a single byte to double byte mode*/
   402                         len =ESC_LEN;
   403                         escSeq = DB_ESCAPE;
   404                         CONCAT_ESCAPE_MACRO(args, myTargetIndex, targetLength, escSeq,err,len,mySourceIndex);
   405                         myConverterData->isEscapeAppended = TRUE;
   407                     }
   408                 }
   410                 if(isTargetUCharDBCS){
   411                     if( myTargetIndex <targetLength){
   412                         myTarget[myTargetIndex++] =(char) (targetUniChar >> 8);
   413                         if(offsets){
   414                             *(offsets++) = mySourceIndex-1;
   415                         }
   416                         if(myTargetIndex < targetLength){
   417                             myTarget[myTargetIndex++] =(char) targetUniChar;
   418                             if(offsets){
   419                                 *(offsets++) = mySourceIndex-1;
   420                             }
   421                         }else{
   422                             args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = (char) targetUniChar;
   423                             *err = U_BUFFER_OVERFLOW_ERROR;
   424                         } 
   425                     }else{
   426                         args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] =(char) (targetUniChar >> 8);
   427                         args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = (char) targetUniChar;
   428                         *err = U_BUFFER_OVERFLOW_ERROR;
   429                     }
   431                 }else{
   432                     if( myTargetIndex <targetLength){
   433                         myTarget[myTargetIndex++] = (char) (targetUniChar );
   434                         if(offsets){
   435                             *(offsets++) = mySourceIndex-1;
   436                         }
   438                     }else{
   439                         args->converter->charErrorBuffer[args->converter->charErrorBufferLength++] = (char) targetUniChar;
   440                         *err = U_BUFFER_OVERFLOW_ERROR;
   441                     }
   442                 }
   444             }
   445             else{
   446                 /* oops.. the code point is unassigned */
   447                 /*Handle surrogates */
   448                 /*check if the char is a First surrogate*/
   449                 if(U16_IS_SURROGATE(mySourceChar)) {
   450                     if(U16_IS_SURROGATE_LEAD(mySourceChar)) {
   451                         args->converter->fromUChar32=mySourceChar;
   452 getTrail:
   453                         /*look ahead to find the trail surrogate*/
   454                         if(mySourceIndex <  mySourceLength) {
   455                             /* test the following code unit */
   456                             UChar trail=(UChar) args->source[mySourceIndex];
   457                             if(U16_IS_TRAIL(trail)) {
   458                                 ++mySourceIndex;
   459                                 mySourceChar=U16_GET_SUPPLEMENTARY(args->converter->fromUChar32, trail);
   460                                 args->converter->fromUChar32=0x00;
   461                                 /* there are no surrogates in GB2312*/
   462                                 *err = U_INVALID_CHAR_FOUND;
   463                                 /* exit this condition tree */
   464                             } else {
   465                                 /* this is an unmatched lead code unit (1st surrogate) */
   466                                 /* callback(illegal) */
   467                                 *err=U_ILLEGAL_CHAR_FOUND;
   468                             }
   469                         } else {
   470                             /* no more input */
   471                             *err = U_ZERO_ERROR;
   472                         }
   473                     } else {
   474                         /* this is an unmatched trail code unit (2nd surrogate) */
   475                         /* callback(illegal) */
   476                         *err=U_ILLEGAL_CHAR_FOUND;
   477                     }
   478                 } else {
   479                     /* callback(unassigned) for a BMP code point */
   480                     *err = U_INVALID_CHAR_FOUND;
   481                 }
   483                 args->converter->fromUChar32=mySourceChar;
   484                 break;
   485             }
   486         }
   487         else{
   488             *err = U_BUFFER_OVERFLOW_ERROR;
   489             break;
   490         }
   491         targetUniChar=missingCharMarker;
   492     }
   494     args->target += myTargetIndex;
   495     args->source += mySourceIndex;
   496     myConverterData->isTargetUCharDBCS = isTargetUCharDBCS;
   497 }
   499 static void
   500 _HZ_WriteSub(UConverterFromUnicodeArgs *args, int32_t offsetIndex, UErrorCode *err) {
   501     UConverter *cnv = args->converter;
   502     UConverterDataHZ *convData=(UConverterDataHZ *) cnv->extraInfo;
   503     char *p;
   504     char buffer[4];
   505     p = buffer;
   507     if( convData->isTargetUCharDBCS){
   508         *p++= UCNV_TILDE;
   509         *p++= UCNV_CLOSE_BRACE;
   510         convData->isTargetUCharDBCS=FALSE;
   511     }
   512     *p++= (char)cnv->subChars[0];
   514     ucnv_cbFromUWriteBytes(args,
   515                            buffer, (int32_t)(p - buffer),
   516                            offsetIndex, err);
   517 }
   519 /*
   520  * Structure for cloning an HZ converter into a single memory block.
   521  * ucnv_safeClone() of the HZ converter will align the entire cloneHZStruct,
   522  * and then ucnv_safeClone() of the sub-converter may additionally align
   523  * subCnv inside the cloneHZStruct, for which we need the deadSpace after
   524  * subCnv. This is because UAlignedMemory may be larger than the actually
   525  * necessary alignment size for the platform.
   526  * The other cloneHZStruct fields will not be moved around,
   527  * and are aligned properly with cloneHZStruct's alignment.
   528  */
   529 struct cloneHZStruct
   530 {
   531     UConverter cnv;
   532     UConverter subCnv;
   533     UAlignedMemory deadSpace;
   534     UConverterDataHZ mydata;
   535 };
   538 static UConverter * 
   539 _HZ_SafeClone(const UConverter *cnv, 
   540               void *stackBuffer, 
   541               int32_t *pBufferSize, 
   542               UErrorCode *status)
   543 {
   544     struct cloneHZStruct * localClone;
   545     int32_t size, bufferSizeNeeded = sizeof(struct cloneHZStruct);
   547     if (U_FAILURE(*status)){
   548         return 0;
   549     }
   551     if (*pBufferSize == 0){ /* 'preflighting' request - set needed size into *pBufferSize */
   552         *pBufferSize = bufferSizeNeeded;
   553         return 0;
   554     }
   556     localClone = (struct cloneHZStruct *)stackBuffer;
   557     /* ucnv.c/ucnv_safeClone() copied the main UConverter already */
   559     uprv_memcpy(&localClone->mydata, cnv->extraInfo, sizeof(UConverterDataHZ));
   560     localClone->cnv.extraInfo = &localClone->mydata;
   561     localClone->cnv.isExtraLocal = TRUE;
   563     /* deep-clone the sub-converter */
   564     size = (int32_t)(sizeof(UConverter) + sizeof(UAlignedMemory)); /* include size of padding */
   565     ((UConverterDataHZ*)localClone->cnv.extraInfo)->gbConverter =
   566         ucnv_safeClone(((UConverterDataHZ*)cnv->extraInfo)->gbConverter, &localClone->subCnv, &size, status);
   568     return &localClone->cnv;
   569 }
   571 static void
   572 _HZ_GetUnicodeSet(const UConverter *cnv,
   573                   const USetAdder *sa,
   574                   UConverterUnicodeSet which,
   575                   UErrorCode *pErrorCode) {
   576     /* HZ converts all of ASCII */
   577     sa->addRange(sa->set, 0, 0x7f);
   579     /* add all of the code points that the sub-converter handles */
   580     ucnv_MBCSGetFilteredUnicodeSetForUnicode(
   581         ((UConverterDataHZ*)cnv->extraInfo)->gbConverter->sharedData,
   582         sa, which, UCNV_SET_FILTER_HZ,
   583         pErrorCode);
   584 }
   586 static const UConverterImpl _HZImpl={
   588     UCNV_HZ,
   590     NULL,
   591     NULL,
   593     _HZOpen,
   594     _HZClose,
   595     _HZReset,
   597     UConverter_toUnicode_HZ_OFFSETS_LOGIC,
   598     UConverter_toUnicode_HZ_OFFSETS_LOGIC,
   599     UConverter_fromUnicode_HZ_OFFSETS_LOGIC,
   600     UConverter_fromUnicode_HZ_OFFSETS_LOGIC,
   601     NULL,
   603     NULL,
   604     NULL,
   605     _HZ_WriteSub,
   606     _HZ_SafeClone,
   607     _HZ_GetUnicodeSet
   608 };
   610 static const UConverterStaticData _HZStaticData={
   611     sizeof(UConverterStaticData),
   612         "HZ",
   613          0, 
   614          UCNV_IBM, 
   615          UCNV_HZ, 
   616          1, 
   617          4,
   618         { 0x1a, 0, 0, 0 },
   619         1,
   620         FALSE, 
   621         FALSE,
   622         0,
   623         0,
   624         { 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0 }, /* reserved */
   626 };
   629 const UConverterSharedData _HZData={
   630     sizeof(UConverterSharedData),
   631         ~((uint32_t) 0),
   632         NULL, 
   633         NULL, 
   634         &_HZStaticData, 
   635         FALSE, 
   636         &_HZImpl, 
   637         0
   638 };
   640 #endif /* #if !UCONFIG_NO_LEGACY_CONVERSION */

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