| /* |
| ******************************************************************************* |
| * |
| * Copyright (C) 2005-2008, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ******************************************************************************* |
| * file name: swapimpl.cpp |
| * encoding: US-ASCII |
| * tab size: 8 (not used) |
| * indentation:4 |
| * |
| * created on: 2005may05 |
| * created by: Markus W. Scherer |
| * |
| * Data file swapping functions moved here from the common library |
| * because some data is hardcoded in ICU4C and needs not be swapped any more. |
| * Moving the functions here simplifies testing (for code coverage) because |
| * we need not jump through hoops (like adding snapshots of these files |
| * to testdata). |
| * |
| * The declarations for these functions remain in the internal header files |
| * in icu/source/common/ |
| */ |
| |
| #include "unicode/utypes.h" |
| #include "unicode/putil.h" |
| #include "unicode/udata.h" |
| #include "cmemory.h" |
| #include "cstring.h" |
| #include "uinvchar.h" |
| #include "uassert.h" |
| #include "uarrsort.h" |
| #include "ucmndata.h" |
| #include "udataswp.h" |
| |
| /* swapping implementations in common */ |
| |
| #include "uresdata.h" |
| #include "ucnv_io.h" |
| #include "uprops.h" |
| #include "ucase.h" |
| #include "ubidi_props.h" |
| #include "ucol_swp.h" |
| #include "ucnv_bld.h" |
| #include "unormimp.h" |
| #include "sprpimpl.h" |
| #include "propname.h" |
| #include "rbbidata.h" |
| #include "triedict.h" |
| |
| /* swapping implementations in i18n */ |
| |
| /* definitions */ |
| |
| #define LENGTHOF(array) (int32_t)(sizeof(array)/sizeof((array)[0])) |
| |
| /* Unicode properties data swapping ----------------------------------------- */ |
| |
| U_CAPI int32_t U_EXPORT2 |
| uprops_swap(const UDataSwapper *ds, |
| const void *inData, int32_t length, void *outData, |
| UErrorCode *pErrorCode) { |
| const UDataInfo *pInfo; |
| int32_t headerSize, i; |
| |
| int32_t dataIndexes[UPROPS_INDEX_COUNT]; |
| const int32_t *inData32; |
| |
| /* udata_swapDataHeader checks the arguments */ |
| headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| /* check data format and format version */ |
| pInfo=(const UDataInfo *)((const char *)inData+4); |
| if(!( |
| pInfo->dataFormat[0]==0x55 && /* dataFormat="UPro" */ |
| pInfo->dataFormat[1]==0x50 && |
| pInfo->dataFormat[2]==0x72 && |
| pInfo->dataFormat[3]==0x6f && |
| (pInfo->formatVersion[0]==3 || pInfo->formatVersion[0]==4 || pInfo->formatVersion[0]==5) && |
| pInfo->formatVersion[2]==UTRIE_SHIFT && |
| pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT |
| )) { |
| udata_printError(ds, "uprops_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not a Unicode properties file\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| pInfo->formatVersion[0]); |
| *pErrorCode=U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| /* the properties file must contain at least the indexes array */ |
| if(length>=0 && (length-headerSize)<(int32_t)sizeof(dataIndexes)) { |
| udata_printError(ds, "uprops_swap(): too few bytes (%d after header) for a Unicode properties file\n", |
| length-headerSize); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| /* read the indexes */ |
| inData32=(const int32_t *)((const char *)inData+headerSize); |
| for(i=0; i<UPROPS_INDEX_COUNT; ++i) { |
| dataIndexes[i]=udata_readInt32(ds, inData32[i]); |
| } |
| |
| /* |
| * comments are copied from the data format description in genprops/store.c |
| * indexes[] constants are in uprops.h |
| */ |
| if(length>=0) { |
| int32_t *outData32; |
| |
| if((length-headerSize)<(4*dataIndexes[UPROPS_RESERVED_INDEX])) { |
| udata_printError(ds, "uprops_swap(): too few bytes (%d after header) for a Unicode properties file\n", |
| length-headerSize); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| outData32=(int32_t *)((char *)outData+headerSize); |
| |
| /* copy everything for inaccessible data (padding) */ |
| if(inData32!=outData32) { |
| uprv_memcpy(outData32, inData32, 4*dataIndexes[UPROPS_RESERVED_INDEX]); |
| } |
| |
| /* swap the indexes[16] */ |
| ds->swapArray32(ds, inData32, 4*UPROPS_INDEX_COUNT, outData32, pErrorCode); |
| |
| /* |
| * swap the main properties UTrie |
| * PT serialized properties trie, see utrie.h (byte size: 4*(i0-16)) |
| */ |
| utrie_swap(ds, |
| inData32+UPROPS_INDEX_COUNT, |
| 4*(dataIndexes[UPROPS_PROPS32_INDEX]-UPROPS_INDEX_COUNT), |
| outData32+UPROPS_INDEX_COUNT, |
| pErrorCode); |
| |
| /* |
| * swap the properties and exceptions words |
| * P const uint32_t props32[i1-i0]; |
| * E const uint32_t exceptions[i2-i1]; |
| */ |
| ds->swapArray32(ds, |
| inData32+dataIndexes[UPROPS_PROPS32_INDEX], |
| 4*(dataIndexes[UPROPS_EXCEPTIONS_TOP_INDEX]-dataIndexes[UPROPS_PROPS32_INDEX]), |
| outData32+dataIndexes[UPROPS_PROPS32_INDEX], |
| pErrorCode); |
| |
| /* |
| * swap the UChars |
| * U const UChar uchars[2*(i3-i2)]; |
| */ |
| ds->swapArray16(ds, |
| inData32+dataIndexes[UPROPS_EXCEPTIONS_TOP_INDEX], |
| 4*(dataIndexes[UPROPS_ADDITIONAL_TRIE_INDEX]-dataIndexes[UPROPS_EXCEPTIONS_TOP_INDEX]), |
| outData32+dataIndexes[UPROPS_EXCEPTIONS_TOP_INDEX], |
| pErrorCode); |
| |
| /* |
| * swap the additional UTrie |
| * i3 additionalTrieIndex; -- 32-bit unit index to the additional trie for more properties |
| */ |
| utrie_swap(ds, |
| inData32+dataIndexes[UPROPS_ADDITIONAL_TRIE_INDEX], |
| 4*(dataIndexes[UPROPS_ADDITIONAL_VECTORS_INDEX]-dataIndexes[UPROPS_ADDITIONAL_TRIE_INDEX]), |
| outData32+dataIndexes[UPROPS_ADDITIONAL_TRIE_INDEX], |
| pErrorCode); |
| |
| /* |
| * swap the properties vectors |
| * PV const uint32_t propsVectors[(i6-i4)/i5][i5]==uint32_t propsVectors[i6-i4]; |
| */ |
| ds->swapArray32(ds, |
| inData32+dataIndexes[UPROPS_ADDITIONAL_VECTORS_INDEX], |
| 4*(dataIndexes[UPROPS_RESERVED_INDEX]-dataIndexes[UPROPS_ADDITIONAL_VECTORS_INDEX]), |
| outData32+dataIndexes[UPROPS_ADDITIONAL_VECTORS_INDEX], |
| pErrorCode); |
| } |
| |
| /* i6 reservedItemIndex; -- 32-bit unit index to the top of the properties vectors table */ |
| return headerSize+4*dataIndexes[UPROPS_RESERVED_INDEX]; |
| } |
| |
| /* Unicode case mapping data swapping --------------------------------------- */ |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucase_swap(const UDataSwapper *ds, |
| const void *inData, int32_t length, void *outData, |
| UErrorCode *pErrorCode) { |
| const UDataInfo *pInfo; |
| int32_t headerSize; |
| |
| const uint8_t *inBytes; |
| uint8_t *outBytes; |
| |
| const int32_t *inIndexes; |
| int32_t indexes[16]; |
| |
| int32_t i, offset, count, size; |
| |
| /* udata_swapDataHeader checks the arguments */ |
| headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| /* check data format and format version */ |
| pInfo=(const UDataInfo *)((const char *)inData+4); |
| if(!( |
| pInfo->dataFormat[0]==UCASE_FMT_0 && /* dataFormat="cAsE" */ |
| pInfo->dataFormat[1]==UCASE_FMT_1 && |
| pInfo->dataFormat[2]==UCASE_FMT_2 && |
| pInfo->dataFormat[3]==UCASE_FMT_3 && |
| pInfo->formatVersion[0]==1 && |
| pInfo->formatVersion[2]==UTRIE_SHIFT && |
| pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT |
| )) { |
| udata_printError(ds, "ucase_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as case mapping data\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| pInfo->formatVersion[0]); |
| *pErrorCode=U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| inBytes=(const uint8_t *)inData+headerSize; |
| outBytes=(uint8_t *)outData+headerSize; |
| |
| inIndexes=(const int32_t *)inBytes; |
| |
| if(length>=0) { |
| length-=headerSize; |
| if(length<16*4) { |
| udata_printError(ds, "ucase_swap(): too few bytes (%d after header) for case mapping data\n", |
| length); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| } |
| |
| /* read the first 16 indexes (ICU 3.2/format version 1: UCASE_IX_TOP==16, might grow) */ |
| for(i=0; i<16; ++i) { |
| indexes[i]=udata_readInt32(ds, inIndexes[i]); |
| } |
| |
| /* get the total length of the data */ |
| size=indexes[UCASE_IX_LENGTH]; |
| |
| if(length>=0) { |
| if(length<size) { |
| udata_printError(ds, "ucase_swap(): too few bytes (%d after header) for all of case mapping data\n", |
| length); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| /* copy the data for inaccessible bytes */ |
| if(inBytes!=outBytes) { |
| uprv_memcpy(outBytes, inBytes, size); |
| } |
| |
| offset=0; |
| |
| /* swap the int32_t indexes[] */ |
| count=indexes[UCASE_IX_INDEX_TOP]*4; |
| ds->swapArray32(ds, inBytes, count, outBytes, pErrorCode); |
| offset+=count; |
| |
| /* swap the UTrie */ |
| count=indexes[UCASE_IX_TRIE_SIZE]; |
| utrie_swap(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| |
| /* swap the uint16_t exceptions[] and unfold[] */ |
| count=(indexes[UCASE_IX_EXC_LENGTH]+indexes[UCASE_IX_UNFOLD_LENGTH])*2; |
| ds->swapArray16(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| |
| U_ASSERT(offset==size); |
| } |
| |
| return headerSize+size; |
| } |
| |
| /* Unicode bidi/shaping data swapping --------------------------------------- */ |
| |
| U_CAPI int32_t U_EXPORT2 |
| ubidi_swap(const UDataSwapper *ds, |
| const void *inData, int32_t length, void *outData, |
| UErrorCode *pErrorCode) { |
| const UDataInfo *pInfo; |
| int32_t headerSize; |
| |
| const uint8_t *inBytes; |
| uint8_t *outBytes; |
| |
| const int32_t *inIndexes; |
| int32_t indexes[16]; |
| |
| int32_t i, offset, count, size; |
| |
| /* udata_swapDataHeader checks the arguments */ |
| headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| /* check data format and format version */ |
| pInfo=(const UDataInfo *)((const char *)inData+4); |
| if(!( |
| pInfo->dataFormat[0]==UBIDI_FMT_0 && /* dataFormat="BiDi" */ |
| pInfo->dataFormat[1]==UBIDI_FMT_1 && |
| pInfo->dataFormat[2]==UBIDI_FMT_2 && |
| pInfo->dataFormat[3]==UBIDI_FMT_3 && |
| pInfo->formatVersion[0]==1 && |
| pInfo->formatVersion[2]==UTRIE_SHIFT && |
| pInfo->formatVersion[3]==UTRIE_INDEX_SHIFT |
| )) { |
| udata_printError(ds, "ubidi_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as bidi/shaping data\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| pInfo->formatVersion[0]); |
| *pErrorCode=U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| inBytes=(const uint8_t *)inData+headerSize; |
| outBytes=(uint8_t *)outData+headerSize; |
| |
| inIndexes=(const int32_t *)inBytes; |
| |
| if(length>=0) { |
| length-=headerSize; |
| if(length<16*4) { |
| udata_printError(ds, "ubidi_swap(): too few bytes (%d after header) for bidi/shaping data\n", |
| length); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| } |
| |
| /* read the first 16 indexes (ICU 3.4/format version 1: UBIDI_IX_TOP==16, might grow) */ |
| for(i=0; i<16; ++i) { |
| indexes[i]=udata_readInt32(ds, inIndexes[i]); |
| } |
| |
| /* get the total length of the data */ |
| size=indexes[UBIDI_IX_LENGTH]; |
| |
| if(length>=0) { |
| if(length<size) { |
| udata_printError(ds, "ubidi_swap(): too few bytes (%d after header) for all of bidi/shaping data\n", |
| length); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| /* copy the data for inaccessible bytes */ |
| if(inBytes!=outBytes) { |
| uprv_memcpy(outBytes, inBytes, size); |
| } |
| |
| offset=0; |
| |
| /* swap the int32_t indexes[] */ |
| count=indexes[UBIDI_IX_INDEX_TOP]*4; |
| ds->swapArray32(ds, inBytes, count, outBytes, pErrorCode); |
| offset+=count; |
| |
| /* swap the UTrie */ |
| count=indexes[UBIDI_IX_TRIE_SIZE]; |
| utrie_swap(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| |
| /* swap the uint32_t mirrors[] */ |
| count=indexes[UBIDI_IX_MIRROR_LENGTH]*4; |
| ds->swapArray32(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| |
| /* just skip the uint8_t jgArray[] */ |
| count=indexes[UBIDI_IX_JG_LIMIT]-indexes[UBIDI_IX_JG_START]; |
| offset+=count; |
| |
| U_ASSERT(offset==size); |
| } |
| |
| return headerSize+size; |
| } |
| |
| /* Unicode normalization data swapping -------------------------------------- */ |
| |
| #if !UCONFIG_NO_NORMALIZATION |
| |
| U_CAPI int32_t U_EXPORT2 |
| unorm_swap(const UDataSwapper *ds, |
| const void *inData, int32_t length, void *outData, |
| UErrorCode *pErrorCode) { |
| const UDataInfo *pInfo; |
| int32_t headerSize; |
| |
| const uint8_t *inBytes; |
| uint8_t *outBytes; |
| |
| const int32_t *inIndexes; |
| int32_t indexes[32]; |
| |
| int32_t i, offset, count, size; |
| |
| /* udata_swapDataHeader checks the arguments */ |
| headerSize=udata_swapDataHeader(ds, inData, length, outData, pErrorCode); |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| /* check data format and format version */ |
| pInfo=(const UDataInfo *)((const char *)inData+4); |
| if(!( |
| pInfo->dataFormat[0]==0x4e && /* dataFormat="Norm" */ |
| pInfo->dataFormat[1]==0x6f && |
| pInfo->dataFormat[2]==0x72 && |
| pInfo->dataFormat[3]==0x6d && |
| pInfo->formatVersion[0]==2 |
| )) { |
| udata_printError(ds, "unorm_swap(): data format %02x.%02x.%02x.%02x (format version %02x) is not recognized as unorm.icu\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| pInfo->formatVersion[0]); |
| *pErrorCode=U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| inBytes=(const uint8_t *)inData+headerSize; |
| outBytes=(uint8_t *)outData+headerSize; |
| |
| inIndexes=(const int32_t *)inBytes; |
| |
| if(length>=0) { |
| length-=headerSize; |
| if(length<32*4) { |
| udata_printError(ds, "unorm_swap(): too few bytes (%d after header) for unorm.icu\n", |
| length); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| } |
| |
| /* read the first 32 indexes (ICU 2.8/format version 2.2: _NORM_INDEX_TOP==32, might grow) */ |
| for(i=0; i<32; ++i) { |
| indexes[i]=udata_readInt32(ds, inIndexes[i]); |
| } |
| |
| /* calculate the total length of the data */ |
| size= |
| 32*4+ /* size of indexes[] */ |
| indexes[_NORM_INDEX_TRIE_SIZE]+ |
| indexes[_NORM_INDEX_UCHAR_COUNT]*2+ |
| indexes[_NORM_INDEX_COMBINE_DATA_COUNT]*2+ |
| indexes[_NORM_INDEX_FCD_TRIE_SIZE]+ |
| indexes[_NORM_INDEX_AUX_TRIE_SIZE]+ |
| indexes[_NORM_INDEX_CANON_SET_COUNT]*2; |
| |
| if(length>=0) { |
| if(length<size) { |
| udata_printError(ds, "unorm_swap(): too few bytes (%d after header) for all of unorm.icu\n", |
| length); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| /* copy the data for inaccessible bytes */ |
| if(inBytes!=outBytes) { |
| uprv_memcpy(outBytes, inBytes, size); |
| } |
| |
| offset=0; |
| |
| /* swap the indexes[] */ |
| count=32*4; |
| ds->swapArray32(ds, inBytes, count, outBytes, pErrorCode); |
| offset+=count; |
| |
| /* swap the main UTrie */ |
| count=indexes[_NORM_INDEX_TRIE_SIZE]; |
| utrie_swap(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| |
| /* swap the uint16_t extraData[] and the uint16_t combiningTable[] */ |
| count=(indexes[_NORM_INDEX_UCHAR_COUNT]+indexes[_NORM_INDEX_COMBINE_DATA_COUNT])*2; |
| ds->swapArray16(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| |
| /* swap the FCD UTrie */ |
| count=indexes[_NORM_INDEX_FCD_TRIE_SIZE]; |
| if(count!=0) { |
| utrie_swap(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| } |
| |
| /* swap the aux UTrie */ |
| count=indexes[_NORM_INDEX_AUX_TRIE_SIZE]; |
| if(count!=0) { |
| utrie_swap(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| } |
| |
| /* swap the uint16_t combiningTable[] */ |
| count=indexes[_NORM_INDEX_CANON_SET_COUNT]*2; |
| ds->swapArray16(ds, inBytes+offset, count, outBytes+offset, pErrorCode); |
| offset+=count; |
| } |
| |
| return headerSize+size; |
| } |
| |
| #endif |
| |
| /* swap any data (except a .dat package) ------------------------------------ */ |
| |
| static const struct { |
| uint8_t dataFormat[4]; |
| UDataSwapFn *swapFn; |
| } swapFns[]={ |
| { { 0x52, 0x65, 0x73, 0x42 }, ures_swap }, /* dataFormat="ResB" */ |
| #if !UCONFIG_NO_LEGACY_CONVERSION |
| { { 0x63, 0x6e, 0x76, 0x74 }, ucnv_swap }, /* dataFormat="cnvt" */ |
| #endif |
| #if !UCONFIG_NO_CONVERSION |
| { { 0x43, 0x76, 0x41, 0x6c }, ucnv_swapAliases }, /* dataFormat="CvAl" */ |
| #endif |
| #if !UCONFIG_NO_IDNA |
| { { 0x53, 0x50, 0x52, 0x50 }, usprep_swap }, /* dataFormat="SPRP" */ |
| #endif |
| /* insert data formats here, descending by expected frequency of occurrence */ |
| { { 0x55, 0x50, 0x72, 0x6f }, uprops_swap }, /* dataFormat="UPro" */ |
| |
| { { UCASE_FMT_0, UCASE_FMT_1, UCASE_FMT_2, UCASE_FMT_3 }, |
| ucase_swap }, /* dataFormat="cAsE" */ |
| |
| { { UBIDI_FMT_0, UBIDI_FMT_1, UBIDI_FMT_2, UBIDI_FMT_3 }, |
| ubidi_swap }, /* dataFormat="BiDi" */ |
| |
| #if !UCONFIG_NO_NORMALIZATION |
| { { 0x4e, 0x6f, 0x72, 0x6d }, unorm_swap }, /* dataFormat="Norm" */ |
| #endif |
| #if !UCONFIG_NO_COLLATION |
| { { 0x55, 0x43, 0x6f, 0x6c }, ucol_swap }, /* dataFormat="UCol" */ |
| { { 0x49, 0x6e, 0x76, 0x43 }, ucol_swapInverseUCA },/* dataFormat="InvC" */ |
| #endif |
| #if !UCONFIG_NO_BREAK_ITERATION |
| { { 0x42, 0x72, 0x6b, 0x20 }, ubrk_swap }, /* dataFormat="Brk " */ |
| { { 0x54, 0x72, 0x44, 0x63 }, triedict_swap }, /* dataFormat="TrDc " */ |
| #endif |
| { { 0x70, 0x6e, 0x61, 0x6d }, upname_swap }, /* dataFormat="pnam" */ |
| { { 0x75, 0x6e, 0x61, 0x6d }, uchar_swapNames } /* dataFormat="unam" */ |
| }; |
| |
| U_CAPI int32_t U_EXPORT2 |
| udata_swap(const UDataSwapper *ds, |
| const void *inData, int32_t length, void *outData, |
| UErrorCode *pErrorCode) { |
| char dataFormatChars[4]; |
| const UDataInfo *pInfo; |
| int32_t headerSize, i, swappedLength; |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return 0; |
| } |
| |
| /* |
| * Preflight the header first; checks for illegal arguments, too. |
| * Do not swap the header right away because the format-specific swapper |
| * will swap it, get the headerSize again, and also use the header |
| * information. Otherwise we would have to pass some of the information |
| * and not be able to use the UDataSwapFn signature. |
| */ |
| headerSize=udata_swapDataHeader(ds, inData, -1, NULL, pErrorCode); |
| |
| /* |
| * If we wanted udata_swap() to also handle non-loadable data like a UTrie, |
| * then we could check here for further known magic values and structures. |
| */ |
| if(U_FAILURE(*pErrorCode)) { |
| return 0; /* the data format was not recognized */ |
| } |
| |
| pInfo=(const UDataInfo *)((const char *)inData+4); |
| |
| { |
| /* convert the data format from ASCII to Unicode to the system charset */ |
| UChar u[4]={ |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3] |
| }; |
| |
| if(uprv_isInvariantUString(u, 4)) { |
| u_UCharsToChars(u, dataFormatChars, 4); |
| } else { |
| dataFormatChars[0]=dataFormatChars[1]=dataFormatChars[2]=dataFormatChars[3]='?'; |
| } |
| } |
| |
| /* dispatch to the swap function for the dataFormat */ |
| for(i=0; i<LENGTHOF(swapFns); ++i) { |
| if(0==memcmp(swapFns[i].dataFormat, pInfo->dataFormat, 4)) { |
| swappedLength=swapFns[i].swapFn(ds, inData, length, outData, pErrorCode); |
| |
| if(U_FAILURE(*pErrorCode)) { |
| udata_printError(ds, "udata_swap(): failure swapping data format %02x.%02x.%02x.%02x (\"%c%c%c%c\") - %s\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| dataFormatChars[0], dataFormatChars[1], |
| dataFormatChars[2], dataFormatChars[3], |
| u_errorName(*pErrorCode)); |
| } else if(swappedLength<(length-15)) { |
| /* swapped less than expected */ |
| udata_printError(ds, "udata_swap() warning: swapped only %d out of %d bytes - data format %02x.%02x.%02x.%02x (\"%c%c%c%c\")\n", |
| swappedLength, length, |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| dataFormatChars[0], dataFormatChars[1], |
| dataFormatChars[2], dataFormatChars[3], |
| u_errorName(*pErrorCode)); |
| } |
| |
| return swappedLength; |
| } |
| } |
| |
| /* the dataFormat was not recognized */ |
| udata_printError(ds, "udata_swap(): unknown data format %02x.%02x.%02x.%02x (\"%c%c%c%c\")\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| dataFormatChars[0], dataFormatChars[1], |
| dataFormatChars[2], dataFormatChars[3]); |
| |
| *pErrorCode=U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
