| /* |
| ****************************************************************************** |
| * |
| * Copyright (C) 1999-2008, International Business Machines |
| * Corporation and others. All Rights Reserved. |
| * |
| ****************************************************************************** |
| * |
| * |
| * ucnv_io.c: |
| * initializes global variables and defines functions pertaining to converter |
| * name resolution aspect of the conversion code. |
| * |
| * new implementation: |
| * |
| * created on: 1999nov22 |
| * created by: Markus W. Scherer |
| * |
| * Use the binary cnvalias.icu (created from convrtrs.txt) to work |
| * with aliases for converter names. |
| * |
| * Date Name Description |
| * 11/22/1999 markus Created |
| * 06/28/2002 grhoten Major overhaul of the converter alias design. |
| * Now an alias can map to different converters |
| * depending on the specified standard. |
| ******************************************************************************* |
| */ |
| |
| #include "unicode/utypes.h" |
| |
| #if !UCONFIG_NO_CONVERSION |
| |
| #include "unicode/ucnv.h" |
| #include "unicode/udata.h" |
| |
| #include "umutex.h" |
| #include "uarrsort.h" |
| #include "udataswp.h" |
| #include "cstring.h" |
| #include "cmemory.h" |
| #include "ucnv_io.h" |
| #include "uenumimp.h" |
| #include "ucln_cmn.h" |
| |
| /* Format of cnvalias.icu ----------------------------------------------------- |
| * |
| * cnvalias.icu is a binary, memory-mappable form of convrtrs.txt. |
| * This binary form contains several tables. All indexes are to uint16_t |
| * units, and not to the bytes (uint8_t units). Addressing everything on |
| * 16-bit boundaries allows us to store more information with small index |
| * numbers, which are also 16-bit in size. The majority of the table (except |
| * the string table) are 16-bit numbers. |
| * |
| * First there is the size of the Table of Contents (TOC). The TOC |
| * entries contain the size of each section. In order to find the offset |
| * you just need to sum up the previous offsets. |
| * The TOC length and entries are an array of uint32_t values. |
| * The first section after the TOC starts immediately after the TOC. |
| * |
| * 1) This section contains a list of converters. This list contains indexes |
| * into the string table for the converter name. The index of this list is |
| * also used by other sections, which are mentioned later on. |
| * This list is not sorted. |
| * |
| * 2) This section contains a list of tags. This list contains indexes |
| * into the string table for the tag name. The index of this list is |
| * also used by other sections, which are mentioned later on. |
| * This list is in priority order of standards. |
| * |
| * 3) This section contains a list of sorted unique aliases. This |
| * list contains indexes into the string table for the alias name. The |
| * index of this list is also used by other sections, like the 4th section. |
| * The index for the 3rd and 4th section is used to get the |
| * alias -> converter name mapping. Section 3 and 4 form a two column table. |
| * Some of the most significant bits of each index may contain other |
| * information (see findConverter for details). |
| * |
| * 4) This section contains a list of mapped converter names. Consider this |
| * as a table that maps the 3rd section to the 1st section. This list contains |
| * indexes into the 1st section. The index of this list is the same index in |
| * the 3rd section. There is also some extra information in the high bits of |
| * each converter index in this table. Currently it's only used to say that |
| * an alias mapped to this converter is ambiguous. See UCNV_CONVERTER_INDEX_MASK |
| * and UCNV_AMBIGUOUS_ALIAS_MAP_BIT for more information. This section is |
| * the predigested form of the 5th section so that an alias lookup can be fast. |
| * |
| * 5) This section contains a 2D array with indexes to the 6th section. This |
| * section is the full form of all alias mappings. The column index is the |
| * index into the converter list (column header). The row index is the index |
| * to tag list (row header). This 2D array is the top part a 3D array. The |
| * third dimension is in the 6th section. |
| * |
| * 6) This is blob of variable length arrays. Each array starts with a size, |
| * and is followed by indexes to alias names in the string table. This is |
| * the third dimension to the section 5. No other section should be referencing |
| * this section. |
| * |
| * 7) Starting in ICU 3.6, this can be a UConverterAliasOptions struct. Its |
| * presence indicates that a section 9 exists. UConverterAliasOptions specifies |
| * what type of string normalization is used among other potential things in the |
| * future. |
| * |
| * 8) This is the string table. All strings are indexed on an even address. |
| * There are two reasons for this. First many chip architectures locate strings |
| * faster on even address boundaries. Second, since all indexes are 16-bit |
| * numbers, this string table can be 128KB in size instead of 64KB when we |
| * only have strings starting on an even address. |
| * |
| * 9) When present this is a set of prenormalized strings from section 8. This |
| * table contains normalized strings with the dashes and spaces stripped out, |
| * and all strings lowercased. In the future, the options in section 7 may state |
| * other types of normalization. |
| * |
| * Here is the concept of section 5 and 6. It's a 3D cube. Each tag |
| * has a unique alias among all converters. That same alias can |
| * be mentioned in other standards on different converters, |
| * but only one alias per tag can be unique. |
| * |
| * |
| * Converter Names (Usually in TR22 form) |
| * -------------------------------------------. |
| * T / /| |
| * a / / | |
| * g / / | |
| * s / / | |
| * / / | |
| * ------------------------------------------/ | |
| * A | | | |
| * l | | | |
| * i | | / |
| * a | | / |
| * s | | / |
| * e | | / |
| * s | |/ |
| * ------------------------------------------- |
| * |
| * |
| * |
| * Here is what it really looks like. It's like swiss cheese. |
| * There are holes. Some converters aren't recognized by |
| * a standard, or they are really old converters that the |
| * standard doesn't recognize anymore. |
| * |
| * Converter Names (Usually in TR22 form) |
| * -------------------------------------------. |
| * T /##########################################/| |
| * a / # # /# |
| * g / # ## ## ### # ### ### ### #/ |
| * s / # ##### #### ## ## #/# |
| * / ### # # ## # # # ### # # #/## |
| * ------------------------------------------/# # |
| * A |### # # ## # # # ### # # #|# # |
| * l |# # # # # ## # #|# # |
| * i |# # # # # # #|# |
| * a |# #|# |
| * s | #|# |
| * e |
| * s |
| * |
| */ |
| |
| /** |
| * Used by the UEnumeration API |
| */ |
| typedef struct UAliasContext { |
| uint32_t listOffset; |
| uint32_t listIdx; |
| } UAliasContext; |
| |
| static const char DATA_NAME[] = "cnvalias"; |
| static const char DATA_TYPE[] = "icu"; |
| |
| static UDataMemory *gAliasData=NULL; |
| |
| enum { |
| tocLengthIndex=0, |
| converterListIndex=1, |
| tagListIndex=2, |
| aliasListIndex=3, |
| untaggedConvArrayIndex=4, |
| taggedAliasArrayIndex=5, |
| taggedAliasListsIndex=6, |
| tableOptionsIndex=7, |
| stringTableIndex=8, |
| normalizedStringTableIndex=9, |
| offsetsCount, /* length of the swapper's temporary offsets[] */ |
| minTocLength=8 /* min. tocLength in the file, does not count the tocLengthIndex! */ |
| }; |
| |
| static const UConverterAliasOptions defaultTableOptions = { |
| UCNV_IO_UNNORMALIZED, |
| 0 /* containsCnvOptionInfo */ |
| }; |
| static UConverterAlias gMainTable; |
| |
| #define GET_STRING(idx) (const char *)(gMainTable.stringTable + (idx)) |
| #define GET_NORMALIZED_STRING(idx) (const char *)(gMainTable.normalizedStringTable + (idx)) |
| |
| static UBool U_CALLCONV |
| isAcceptable(void *context, |
| const char *type, const char *name, |
| const UDataInfo *pInfo) { |
| return (UBool)( |
| pInfo->size>=20 && |
| pInfo->isBigEndian==U_IS_BIG_ENDIAN && |
| pInfo->charsetFamily==U_CHARSET_FAMILY && |
| pInfo->dataFormat[0]==0x43 && /* dataFormat="CvAl" */ |
| pInfo->dataFormat[1]==0x76 && |
| pInfo->dataFormat[2]==0x41 && |
| pInfo->dataFormat[3]==0x6c && |
| pInfo->formatVersion[0]==3); |
| } |
| |
| static UBool U_CALLCONV ucnv_io_cleanup(void) |
| { |
| if (gAliasData) { |
| udata_close(gAliasData); |
| gAliasData = NULL; |
| } |
| |
| uprv_memset(&gMainTable, 0, sizeof(gMainTable)); |
| |
| return TRUE; /* Everything was cleaned up */ |
| } |
| |
| static UBool |
| haveAliasData(UErrorCode *pErrorCode) { |
| int needInit; |
| |
| if(pErrorCode==NULL || U_FAILURE(*pErrorCode)) { |
| return FALSE; |
| } |
| |
| UMTX_CHECK(NULL, (gAliasData==NULL), needInit); |
| |
| /* load converter alias data from file if necessary */ |
| if (needInit) { |
| UDataMemory *data; |
| const uint16_t *table; |
| const uint32_t *sectionSizes; |
| uint32_t tableStart; |
| uint32_t currOffset; |
| |
| data = udata_openChoice(NULL, DATA_TYPE, DATA_NAME, isAcceptable, NULL, pErrorCode); |
| if(U_FAILURE(*pErrorCode)) { |
| return FALSE; |
| } |
| |
| sectionSizes = (const uint32_t *)udata_getMemory(data); |
| table = (const uint16_t *)sectionSizes; |
| |
| tableStart = sectionSizes[0]; |
| if (tableStart < minTocLength) { |
| *pErrorCode = U_INVALID_FORMAT_ERROR; |
| udata_close(data); |
| return FALSE; |
| } |
| |
| umtx_lock(NULL); |
| if(gAliasData==NULL) { |
| gMainTable.converterListSize = sectionSizes[1]; |
| gMainTable.tagListSize = sectionSizes[2]; |
| gMainTable.aliasListSize = sectionSizes[3]; |
| gMainTable.untaggedConvArraySize = sectionSizes[4]; |
| gMainTable.taggedAliasArraySize = sectionSizes[5]; |
| gMainTable.taggedAliasListsSize = sectionSizes[6]; |
| gMainTable.optionTableSize = sectionSizes[7]; |
| gMainTable.stringTableSize = sectionSizes[8]; |
| |
| if (tableStart > 8) { |
| gMainTable.normalizedStringTableSize = sectionSizes[9]; |
| } |
| |
| currOffset = tableStart * (sizeof(uint32_t)/sizeof(uint16_t)) + (sizeof(uint32_t)/sizeof(uint16_t)); |
| gMainTable.converterList = table + currOffset; |
| |
| currOffset += gMainTable.converterListSize; |
| gMainTable.tagList = table + currOffset; |
| |
| currOffset += gMainTable.tagListSize; |
| gMainTable.aliasList = table + currOffset; |
| |
| currOffset += gMainTable.aliasListSize; |
| gMainTable.untaggedConvArray = table + currOffset; |
| |
| currOffset += gMainTable.untaggedConvArraySize; |
| gMainTable.taggedAliasArray = table + currOffset; |
| |
| /* aliasLists is a 1's based array, but it has a padding character */ |
| currOffset += gMainTable.taggedAliasArraySize; |
| gMainTable.taggedAliasLists = table + currOffset; |
| |
| currOffset += gMainTable.taggedAliasListsSize; |
| if (gMainTable.optionTableSize > 0 |
| && ((const UConverterAliasOptions *)(table + currOffset))->stringNormalizationType < UCNV_IO_NORM_TYPE_COUNT) |
| { |
| /* Faster table */ |
| gMainTable.optionTable = (const UConverterAliasOptions *)(table + currOffset); |
| } |
| else { |
| /* Smaller table, or I can't handle this normalization mode! |
| Use the original slower table lookup. */ |
| gMainTable.optionTable = &defaultTableOptions; |
| } |
| |
| currOffset += gMainTable.optionTableSize; |
| gMainTable.stringTable = table + currOffset; |
| |
| currOffset += gMainTable.stringTableSize; |
| gMainTable.normalizedStringTable = ((gMainTable.optionTable->stringNormalizationType == UCNV_IO_UNNORMALIZED) |
| ? gMainTable.stringTable : (table + currOffset)); |
| |
| ucln_common_registerCleanup(UCLN_COMMON_UCNV_IO, ucnv_io_cleanup); |
| |
| gAliasData = data; |
| data=NULL; |
| } |
| umtx_unlock(NULL); |
| |
| /* if a different thread set it first, then close the extra data */ |
| if(data!=NULL) { |
| udata_close(data); /* NULL if it was set correctly */ |
| } |
| } |
| |
| return TRUE; |
| } |
| |
| static U_INLINE UBool |
| isAlias(const char *alias, UErrorCode *pErrorCode) { |
| if(alias==NULL) { |
| *pErrorCode=U_ILLEGAL_ARGUMENT_ERROR; |
| return FALSE; |
| } |
| return (UBool)(*alias!=0); |
| } |
| |
| static uint32_t getTagNumber(const char *tagname) { |
| if (gMainTable.tagList) { |
| uint32_t tagNum; |
| for (tagNum = 0; tagNum < gMainTable.tagListSize; tagNum++) { |
| if (!uprv_stricmp(GET_STRING(gMainTable.tagList[tagNum]), tagname)) { |
| return tagNum; |
| } |
| } |
| } |
| |
| return UINT32_MAX; |
| } |
| |
| /* character types relevant for ucnv_compareNames() */ |
| enum { |
| IGNORE, |
| ZERO, |
| NONZERO, |
| MINLETTER /* any values from here on are lowercase letter mappings */ |
| }; |
| |
| /* character types for ASCII 00..7F */ |
| static const uint8_t asciiTypes[128] = { |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| ZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, 0, 0, 0, 0, 0, 0, |
| 0, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, |
| 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0, 0, 0, 0, 0, |
| 0, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, |
| 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0, 0, 0, 0, 0 |
| }; |
| |
| #define GET_ASCII_TYPE(c) ((int8_t)(c) >= 0 ? asciiTypes[(uint8_t)c] : (uint8_t)IGNORE) |
| |
| /* character types for EBCDIC 80..FF */ |
| static const uint8_t ebcdicTypes[128] = { |
| 0, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0, 0, 0, 0, 0, 0, |
| 0, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, |
| 0, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89, 0, 0, 0, 0, 0, 0, |
| 0, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0, 0, 0, 0, 0, 0, |
| 0, 0, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0, 0, 0, 0, 0, 0, |
| ZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, NONZERO, 0, 0, 0, 0, 0, 0 |
| }; |
| |
| #define GET_EBCDIC_TYPE(c) ((int8_t)(c) < 0 ? ebcdicTypes[(c)&0x7f] : (uint8_t)IGNORE) |
| |
| #if U_CHARSET_FAMILY==U_ASCII_FAMILY |
| # define GET_CHAR_TYPE(c) GET_ASCII_TYPE(c) |
| #elif U_CHARSET_FAMILY==U_EBCDIC_FAMILY |
| # define GET_CHAR_TYPE(c) GET_EBCDIC_TYPE(c) |
| #else |
| # error U_CHARSET_FAMILY is not valid |
| #endif |
| |
| /* @see ucnv_compareNames */ |
| U_CFUNC char * U_EXPORT2 |
| ucnv_io_stripASCIIForCompare(char *dst, const char *name) { |
| char *dstItr = dst; |
| uint8_t type, nextType; |
| char c1; |
| UBool afterDigit = FALSE; |
| |
| while ((c1 = *name++) != 0) { |
| type = GET_ASCII_TYPE(c1); |
| switch (type) { |
| case IGNORE: |
| afterDigit = FALSE; |
| continue; /* ignore all but letters and digits */ |
| case ZERO: |
| if (!afterDigit) { |
| nextType = GET_ASCII_TYPE(*name); |
| if (nextType == ZERO || nextType == NONZERO) { |
| continue; /* ignore leading zero before another digit */ |
| } |
| } |
| break; |
| case NONZERO: |
| afterDigit = TRUE; |
| break; |
| default: |
| c1 = (char)type; /* lowercased letter */ |
| afterDigit = FALSE; |
| break; |
| } |
| *dstItr++ = c1; |
| } |
| *dstItr = 0; |
| return dst; |
| } |
| |
| U_CFUNC char * U_EXPORT2 |
| ucnv_io_stripEBCDICForCompare(char *dst, const char *name) { |
| char *dstItr = dst; |
| uint8_t type, nextType; |
| char c1; |
| UBool afterDigit = FALSE; |
| |
| while ((c1 = *name++) != 0) { |
| type = GET_EBCDIC_TYPE(c1); |
| switch (type) { |
| case IGNORE: |
| afterDigit = FALSE; |
| continue; /* ignore all but letters and digits */ |
| case ZERO: |
| if (!afterDigit) { |
| nextType = GET_EBCDIC_TYPE(*name); |
| if (nextType == ZERO || nextType == NONZERO) { |
| continue; /* ignore leading zero before another digit */ |
| } |
| } |
| break; |
| case NONZERO: |
| afterDigit = TRUE; |
| break; |
| default: |
| c1 = (char)type; /* lowercased letter */ |
| afterDigit = FALSE; |
| break; |
| } |
| *dstItr++ = c1; |
| } |
| *dstItr = 0; |
| return dst; |
| } |
| |
| /** |
| * Do a fuzzy compare of two converter/alias names. |
| * The comparison is case-insensitive, ignores leading zeroes if they are not |
| * followed by further digits, and ignores all but letters and digits. |
| * Thus the strings "UTF-8", "utf_8", "u*T@f08" and "Utf 8" are exactly equivalent. |
| * See section 1.4, Charset Alias Matching in Unicode Technical Standard #22 |
| * at http://www.unicode.org/reports/tr22/ |
| * |
| * This is a symmetrical (commutative) operation; order of arguments |
| * is insignificant. This is an important property for sorting the |
| * list (when the list is preprocessed into binary form) and for |
| * performing binary searches on it at run time. |
| * |
| * @param name1 a converter name or alias, zero-terminated |
| * @param name2 a converter name or alias, zero-terminated |
| * @return 0 if the names match, or a negative value if the name1 |
| * lexically precedes name2, or a positive value if the name1 |
| * lexically follows name2. |
| * |
| * @see ucnv_io_stripForCompare |
| */ |
| U_CAPI int U_EXPORT2 |
| ucnv_compareNames(const char *name1, const char *name2) { |
| int rc; |
| uint8_t type, nextType; |
| char c1, c2; |
| UBool afterDigit1 = FALSE, afterDigit2 = FALSE; |
| |
| for (;;) { |
| while ((c1 = *name1++) != 0) { |
| type = GET_CHAR_TYPE(c1); |
| switch (type) { |
| case IGNORE: |
| afterDigit1 = FALSE; |
| continue; /* ignore all but letters and digits */ |
| case ZERO: |
| if (!afterDigit1) { |
| nextType = GET_CHAR_TYPE(*name1); |
| if (nextType == ZERO || nextType == NONZERO) { |
| continue; /* ignore leading zero before another digit */ |
| } |
| } |
| break; |
| case NONZERO: |
| afterDigit1 = TRUE; |
| break; |
| default: |
| c1 = (char)type; /* lowercased letter */ |
| afterDigit1 = FALSE; |
| break; |
| } |
| break; /* deliver c1 */ |
| } |
| while ((c2 = *name2++) != 0) { |
| type = GET_CHAR_TYPE(c2); |
| switch (type) { |
| case IGNORE: |
| afterDigit2 = FALSE; |
| continue; /* ignore all but letters and digits */ |
| case ZERO: |
| if (!afterDigit2) { |
| nextType = GET_CHAR_TYPE(*name2); |
| if (nextType == ZERO || nextType == NONZERO) { |
| continue; /* ignore leading zero before another digit */ |
| } |
| } |
| break; |
| case NONZERO: |
| afterDigit2 = TRUE; |
| break; |
| default: |
| c2 = (char)type; /* lowercased letter */ |
| afterDigit2 = FALSE; |
| break; |
| } |
| break; /* deliver c2 */ |
| } |
| |
| /* If we reach the ends of both strings then they match */ |
| if ((c1|c2)==0) { |
| return 0; |
| } |
| |
| /* Case-insensitive comparison */ |
| rc = (int)(unsigned char)c1 - (int)(unsigned char)c2; |
| if (rc != 0) { |
| return rc; |
| } |
| } |
| } |
| |
| /* |
| * search for an alias |
| * return the converter number index for gConverterList |
| */ |
| static U_INLINE uint32_t |
| findConverter(const char *alias, UBool *containsOption, UErrorCode *pErrorCode) { |
| uint32_t mid, start, limit; |
| uint32_t lastMid; |
| int result; |
| int isUnnormalized = (gMainTable.optionTable->stringNormalizationType == UCNV_IO_UNNORMALIZED); |
| char strippedName[UCNV_MAX_CONVERTER_NAME_LENGTH]; |
| |
| if (!isUnnormalized) { |
| if (uprv_strlen(alias) >= UCNV_MAX_CONVERTER_NAME_LENGTH) { |
| *pErrorCode = U_BUFFER_OVERFLOW_ERROR; |
| return UINT32_MAX; |
| } |
| |
| /* Lower case and remove ignoreable characters. */ |
| ucnv_io_stripForCompare(strippedName, alias); |
| alias = strippedName; |
| } |
| |
| /* do a binary search for the alias */ |
| start = 0; |
| limit = gMainTable.untaggedConvArraySize; |
| mid = limit; |
| lastMid = UINT32_MAX; |
| |
| for (;;) { |
| mid = (uint32_t)((start + limit) / 2); |
| if (lastMid == mid) { /* Have we moved? */ |
| break; /* We haven't moved, and it wasn't found. */ |
| } |
| lastMid = mid; |
| if (isUnnormalized) { |
| result = ucnv_compareNames(alias, GET_STRING(gMainTable.aliasList[mid])); |
| } |
| else { |
| result = uprv_strcmp(alias, GET_NORMALIZED_STRING(gMainTable.aliasList[mid])); |
| } |
| |
| if (result < 0) { |
| limit = mid; |
| } else if (result > 0) { |
| start = mid; |
| } else { |
| /* Since the gencnval tool folds duplicates into one entry, |
| * this alias in gAliasList is unique, but different standards |
| * may map an alias to different converters. |
| */ |
| if (gMainTable.untaggedConvArray[mid] & UCNV_AMBIGUOUS_ALIAS_MAP_BIT) { |
| *pErrorCode = U_AMBIGUOUS_ALIAS_WARNING; |
| } |
| /* State whether the canonical converter name contains an option. |
| This information is contained in this list in order to maintain backward & forward compatibility. */ |
| if (containsOption) { |
| UBool containsCnvOptionInfo = (UBool)gMainTable.optionTable->containsCnvOptionInfo; |
| *containsOption = (UBool)((containsCnvOptionInfo |
| && ((gMainTable.untaggedConvArray[mid] & UCNV_CONTAINS_OPTION_BIT) != 0)) |
| || !containsCnvOptionInfo); |
| } |
| return gMainTable.untaggedConvArray[mid] & UCNV_CONVERTER_INDEX_MASK; |
| } |
| } |
| |
| return UINT32_MAX; |
| } |
| |
| /* |
| * Is this alias in this list? |
| * alias and listOffset should be non-NULL. |
| */ |
| static U_INLINE UBool |
| isAliasInList(const char *alias, uint32_t listOffset) { |
| if (listOffset) { |
| uint32_t currAlias; |
| uint32_t listCount = gMainTable.taggedAliasLists[listOffset]; |
| /* +1 to skip listCount */ |
| const uint16_t *currList = gMainTable.taggedAliasLists + listOffset + 1; |
| for (currAlias = 0; currAlias < listCount; currAlias++) { |
| if (currList[currAlias] |
| && ucnv_compareNames(alias, GET_STRING(currList[currAlias]))==0) |
| { |
| return TRUE; |
| } |
| } |
| } |
| return FALSE; |
| } |
| |
| /* |
| * Search for an standard name of an alias (what is the default name |
| * that this standard uses?) |
| * return the listOffset for gTaggedAliasLists. If it's 0, |
| * the it couldn't be found, but the parameters are valid. |
| */ |
| static uint32_t |
| findTaggedAliasListsOffset(const char *alias, const char *standard, UErrorCode *pErrorCode) { |
| uint32_t idx; |
| uint32_t listOffset; |
| uint32_t convNum; |
| UErrorCode myErr = U_ZERO_ERROR; |
| uint32_t tagNum = getTagNumber(standard); |
| |
| /* Make a quick guess. Hopefully they used a TR22 canonical alias. */ |
| convNum = findConverter(alias, NULL, &myErr); |
| if (myErr != U_ZERO_ERROR) { |
| *pErrorCode = myErr; |
| } |
| |
| if (tagNum < (gMainTable.tagListSize - UCNV_NUM_HIDDEN_TAGS) && convNum < gMainTable.converterListSize) { |
| listOffset = gMainTable.taggedAliasArray[tagNum*gMainTable.converterListSize + convNum]; |
| if (listOffset && gMainTable.taggedAliasLists[listOffset + 1]) { |
| return listOffset; |
| } |
| if (myErr == U_AMBIGUOUS_ALIAS_WARNING) { |
| /* Uh Oh! They used an ambiguous alias. |
| We have to search the whole swiss cheese starting |
| at the highest standard affinity. |
| This may take a while. |
| */ |
| for (idx = 0; idx < gMainTable.taggedAliasArraySize; idx++) { |
| listOffset = gMainTable.taggedAliasArray[idx]; |
| if (listOffset && isAliasInList(alias, listOffset)) { |
| uint32_t currTagNum = idx/gMainTable.converterListSize; |
| uint32_t currConvNum = (idx - currTagNum*gMainTable.converterListSize); |
| uint32_t tempListOffset = gMainTable.taggedAliasArray[tagNum*gMainTable.converterListSize + currConvNum]; |
| if (tempListOffset && gMainTable.taggedAliasLists[tempListOffset + 1]) { |
| return tempListOffset; |
| } |
| /* else keep on looking */ |
| /* We could speed this up by starting on the next row |
| because an alias is unique per row, right now. |
| This would change if alias versioning appears. */ |
| } |
| } |
| /* The standard doesn't know about the alias */ |
| } |
| /* else no default name */ |
| return 0; |
| } |
| /* else converter or tag not found */ |
| |
| return UINT32_MAX; |
| } |
| |
| /* Return the canonical name */ |
| static uint32_t |
| findTaggedConverterNum(const char *alias, const char *standard, UErrorCode *pErrorCode) { |
| uint32_t idx; |
| uint32_t listOffset; |
| uint32_t convNum; |
| UErrorCode myErr = U_ZERO_ERROR; |
| uint32_t tagNum = getTagNumber(standard); |
| |
| /* Make a quick guess. Hopefully they used a TR22 canonical alias. */ |
| convNum = findConverter(alias, NULL, &myErr); |
| if (myErr != U_ZERO_ERROR) { |
| *pErrorCode = myErr; |
| } |
| |
| if (tagNum < (gMainTable.tagListSize - UCNV_NUM_HIDDEN_TAGS) && convNum < gMainTable.converterListSize) { |
| listOffset = gMainTable.taggedAliasArray[tagNum*gMainTable.converterListSize + convNum]; |
| if (listOffset && isAliasInList(alias, listOffset)) { |
| return convNum; |
| } |
| if (myErr == U_AMBIGUOUS_ALIAS_WARNING) { |
| /* Uh Oh! They used an ambiguous alias. |
| We have to search one slice of the swiss cheese. |
| We search only in the requested tag, not the whole thing. |
| This may take a while. |
| */ |
| uint32_t convStart = (tagNum)*gMainTable.converterListSize; |
| uint32_t convLimit = (tagNum+1)*gMainTable.converterListSize; |
| for (idx = convStart; idx < convLimit; idx++) { |
| listOffset = gMainTable.taggedAliasArray[idx]; |
| if (listOffset && isAliasInList(alias, listOffset)) { |
| return idx-convStart; |
| } |
| } |
| /* The standard doesn't know about the alias */ |
| } |
| /* else no canonical name */ |
| } |
| /* else converter or tag not found */ |
| |
| return UINT32_MAX; |
| } |
| |
| |
| |
| U_CFUNC const char * |
| ucnv_io_getConverterName(const char *alias, UBool *containsOption, UErrorCode *pErrorCode) { |
| if(haveAliasData(pErrorCode) && isAlias(alias, pErrorCode)) { |
| uint32_t convNum = findConverter(alias, containsOption, pErrorCode); |
| if (convNum < gMainTable.converterListSize) { |
| return GET_STRING(gMainTable.converterList[convNum]); |
| } |
| /* else converter not found */ |
| } |
| return NULL; |
| } |
| |
| static int32_t U_CALLCONV |
| ucnv_io_countStandardAliases(UEnumeration *enumerator, UErrorCode *pErrorCode) { |
| int32_t value = 0; |
| UAliasContext *myContext = (UAliasContext *)(enumerator->context); |
| uint32_t listOffset = myContext->listOffset; |
| |
| if (listOffset) { |
| value = gMainTable.taggedAliasLists[listOffset]; |
| } |
| return value; |
| } |
| |
| static const char* U_CALLCONV |
| ucnv_io_nextStandardAliases(UEnumeration *enumerator, |
| int32_t* resultLength, |
| UErrorCode *pErrorCode) |
| { |
| UAliasContext *myContext = (UAliasContext *)(enumerator->context); |
| uint32_t listOffset = myContext->listOffset; |
| |
| if (listOffset) { |
| uint32_t listCount = gMainTable.taggedAliasLists[listOffset]; |
| const uint16_t *currList = gMainTable.taggedAliasLists + listOffset + 1; |
| |
| if (myContext->listIdx < listCount) { |
| const char *myStr = GET_STRING(currList[myContext->listIdx++]); |
| if (resultLength) { |
| *resultLength = (int32_t)uprv_strlen(myStr); |
| } |
| return myStr; |
| } |
| } |
| /* Either we accessed a zero length list, or we enumerated too far. */ |
| if (resultLength) { |
| *resultLength = 0; |
| } |
| return NULL; |
| } |
| |
| static void U_CALLCONV |
| ucnv_io_resetStandardAliases(UEnumeration *enumerator, UErrorCode *pErrorCode) { |
| ((UAliasContext *)(enumerator->context))->listIdx = 0; |
| } |
| |
| static void U_CALLCONV |
| ucnv_io_closeUEnumeration(UEnumeration *enumerator) { |
| uprv_free(enumerator->context); |
| uprv_free(enumerator); |
| } |
| |
| /* Enumerate the aliases for the specified converter and standard tag */ |
| static const UEnumeration gEnumAliases = { |
| NULL, |
| NULL, |
| ucnv_io_closeUEnumeration, |
| ucnv_io_countStandardAliases, |
| uenum_unextDefault, |
| ucnv_io_nextStandardAliases, |
| ucnv_io_resetStandardAliases |
| }; |
| |
| U_CAPI UEnumeration * U_EXPORT2 |
| ucnv_openStandardNames(const char *convName, |
| const char *standard, |
| UErrorCode *pErrorCode) |
| { |
| UEnumeration *myEnum = NULL; |
| if (haveAliasData(pErrorCode) && isAlias(convName, pErrorCode)) { |
| uint32_t listOffset = findTaggedAliasListsOffset(convName, standard, pErrorCode); |
| |
| /* When listOffset == 0, we want to acknowledge that the |
| converter name and standard are okay, but there |
| is nothing to enumerate. */ |
| if (listOffset < gMainTable.taggedAliasListsSize) { |
| UAliasContext *myContext; |
| |
| myEnum = uprv_malloc(sizeof(UEnumeration)); |
| if (myEnum == NULL) { |
| *pErrorCode = U_MEMORY_ALLOCATION_ERROR; |
| return NULL; |
| } |
| uprv_memcpy(myEnum, &gEnumAliases, sizeof(UEnumeration)); |
| myContext = uprv_malloc(sizeof(UAliasContext)); |
| if (myContext == NULL) { |
| *pErrorCode = U_MEMORY_ALLOCATION_ERROR; |
| uprv_free(myEnum); |
| return NULL; |
| } |
| myContext->listOffset = listOffset; |
| myContext->listIdx = 0; |
| myEnum->context = myContext; |
| } |
| /* else converter or tag not found */ |
| } |
| return myEnum; |
| } |
| |
| static uint16_t |
| ucnv_io_countAliases(const char *alias, UErrorCode *pErrorCode) { |
| if(haveAliasData(pErrorCode) && isAlias(alias, pErrorCode)) { |
| uint32_t convNum = findConverter(alias, NULL, pErrorCode); |
| if (convNum < gMainTable.converterListSize) { |
| /* tagListNum - 1 is the ALL tag */ |
| int32_t listOffset = gMainTable.taggedAliasArray[(gMainTable.tagListSize - 1)*gMainTable.converterListSize + convNum]; |
| |
| if (listOffset) { |
| return gMainTable.taggedAliasLists[listOffset]; |
| } |
| /* else this shouldn't happen. internal program error */ |
| } |
| /* else converter not found */ |
| } |
| return 0; |
| } |
| |
| static uint16_t |
| ucnv_io_getAliases(const char *alias, uint16_t start, const char **aliases, UErrorCode *pErrorCode) { |
| if(haveAliasData(pErrorCode) && isAlias(alias, pErrorCode)) { |
| uint32_t currAlias; |
| uint32_t convNum = findConverter(alias, NULL, pErrorCode); |
| if (convNum < gMainTable.converterListSize) { |
| /* tagListNum - 1 is the ALL tag */ |
| int32_t listOffset = gMainTable.taggedAliasArray[(gMainTable.tagListSize - 1)*gMainTable.converterListSize + convNum]; |
| |
| if (listOffset) { |
| uint32_t listCount = gMainTable.taggedAliasLists[listOffset]; |
| /* +1 to skip listCount */ |
| const uint16_t *currList = gMainTable.taggedAliasLists + listOffset + 1; |
| |
| for (currAlias = start; currAlias < listCount; currAlias++) { |
| aliases[currAlias] = GET_STRING(currList[currAlias]); |
| } |
| } |
| /* else this shouldn't happen. internal program error */ |
| } |
| /* else converter not found */ |
| } |
| return 0; |
| } |
| |
| static const char * |
| ucnv_io_getAlias(const char *alias, uint16_t n, UErrorCode *pErrorCode) { |
| if(haveAliasData(pErrorCode) && isAlias(alias, pErrorCode)) { |
| uint32_t convNum = findConverter(alias, NULL, pErrorCode); |
| if (convNum < gMainTable.converterListSize) { |
| /* tagListNum - 1 is the ALL tag */ |
| int32_t listOffset = gMainTable.taggedAliasArray[(gMainTable.tagListSize - 1)*gMainTable.converterListSize + convNum]; |
| |
| if (listOffset) { |
| uint32_t listCount = gMainTable.taggedAliasLists[listOffset]; |
| /* +1 to skip listCount */ |
| const uint16_t *currList = gMainTable.taggedAliasLists + listOffset + 1; |
| |
| if (n < listCount) { |
| return GET_STRING(currList[n]); |
| } |
| *pErrorCode = U_INDEX_OUTOFBOUNDS_ERROR; |
| } |
| /* else this shouldn't happen. internal program error */ |
| } |
| /* else converter not found */ |
| } |
| return NULL; |
| } |
| |
| static uint16_t |
| ucnv_io_countStandards(UErrorCode *pErrorCode) { |
| if (haveAliasData(pErrorCode)) { |
| /* Don't include the empty list */ |
| return (uint16_t)(gMainTable.tagListSize - UCNV_NUM_HIDDEN_TAGS); |
| } |
| |
| return 0; |
| } |
| |
| U_CAPI const char * U_EXPORT2 |
| ucnv_getStandard(uint16_t n, UErrorCode *pErrorCode) { |
| if (haveAliasData(pErrorCode)) { |
| if (n < gMainTable.tagListSize - UCNV_NUM_HIDDEN_TAGS) { |
| return GET_STRING(gMainTable.tagList[n]); |
| } |
| *pErrorCode = U_INDEX_OUTOFBOUNDS_ERROR; |
| } |
| |
| return NULL; |
| } |
| |
| U_CAPI const char * U_EXPORT2 |
| ucnv_getStandardName(const char *alias, const char *standard, UErrorCode *pErrorCode) { |
| if (haveAliasData(pErrorCode) && isAlias(alias, pErrorCode)) { |
| uint32_t listOffset = findTaggedAliasListsOffset(alias, standard, pErrorCode); |
| |
| if (0 < listOffset && listOffset < gMainTable.taggedAliasListsSize) { |
| const uint16_t *currList = gMainTable.taggedAliasLists + listOffset + 1; |
| |
| /* Get the preferred name from this list */ |
| if (currList[0]) { |
| return GET_STRING(currList[0]); |
| } |
| /* else someone screwed up the alias table. */ |
| /* *pErrorCode = U_INVALID_FORMAT_ERROR */ |
| } |
| } |
| |
| return NULL; |
| } |
| |
| U_CAPI uint16_t U_EXPORT2 |
| ucnv_countAliases(const char *alias, UErrorCode *pErrorCode) |
| { |
| return ucnv_io_countAliases(alias, pErrorCode); |
| } |
| |
| |
| U_CAPI const char* U_EXPORT2 |
| ucnv_getAlias(const char *alias, uint16_t n, UErrorCode *pErrorCode) |
| { |
| return ucnv_io_getAlias(alias, n, pErrorCode); |
| } |
| |
| U_CAPI void U_EXPORT2 |
| ucnv_getAliases(const char *alias, const char **aliases, UErrorCode *pErrorCode) |
| { |
| ucnv_io_getAliases(alias, 0, aliases, pErrorCode); |
| } |
| |
| U_CAPI uint16_t U_EXPORT2 |
| ucnv_countStandards(void) |
| { |
| UErrorCode err = U_ZERO_ERROR; |
| return ucnv_io_countStandards(&err); |
| } |
| |
| U_CAPI const char * U_EXPORT2 |
| ucnv_getCanonicalName(const char *alias, const char *standard, UErrorCode *pErrorCode) { |
| if (haveAliasData(pErrorCode) && isAlias(alias, pErrorCode)) { |
| uint32_t convNum = findTaggedConverterNum(alias, standard, pErrorCode); |
| |
| if (convNum < gMainTable.converterListSize) { |
| return GET_STRING(gMainTable.converterList[convNum]); |
| } |
| } |
| |
| return NULL; |
| } |
| |
| static int32_t U_CALLCONV |
| ucnv_io_countAllConverters(UEnumeration *enumerator, UErrorCode *pErrorCode) { |
| return gMainTable.converterListSize; |
| } |
| |
| static const char* U_CALLCONV |
| ucnv_io_nextAllConverters(UEnumeration *enumerator, |
| int32_t* resultLength, |
| UErrorCode *pErrorCode) |
| { |
| uint16_t *myContext = (uint16_t *)(enumerator->context); |
| |
| if (*myContext < gMainTable.converterListSize) { |
| const char *myStr = GET_STRING(gMainTable.converterList[(*myContext)++]); |
| if (resultLength) { |
| *resultLength = (int32_t)uprv_strlen(myStr); |
| } |
| return myStr; |
| } |
| /* Either we accessed a zero length list, or we enumerated too far. */ |
| if (resultLength) { |
| *resultLength = 0; |
| } |
| return NULL; |
| } |
| |
| static void U_CALLCONV |
| ucnv_io_resetAllConverters(UEnumeration *enumerator, UErrorCode *pErrorCode) { |
| *((uint16_t *)(enumerator->context)) = 0; |
| } |
| |
| static const UEnumeration gEnumAllConverters = { |
| NULL, |
| NULL, |
| ucnv_io_closeUEnumeration, |
| ucnv_io_countAllConverters, |
| uenum_unextDefault, |
| ucnv_io_nextAllConverters, |
| ucnv_io_resetAllConverters |
| }; |
| |
| U_CAPI UEnumeration * U_EXPORT2 |
| ucnv_openAllNames(UErrorCode *pErrorCode) { |
| UEnumeration *myEnum = NULL; |
| if (haveAliasData(pErrorCode)) { |
| uint16_t *myContext; |
| |
| myEnum = uprv_malloc(sizeof(UEnumeration)); |
| if (myEnum == NULL) { |
| *pErrorCode = U_MEMORY_ALLOCATION_ERROR; |
| return NULL; |
| } |
| uprv_memcpy(myEnum, &gEnumAllConverters, sizeof(UEnumeration)); |
| myContext = uprv_malloc(sizeof(uint16_t)); |
| if (myContext == NULL) { |
| *pErrorCode = U_MEMORY_ALLOCATION_ERROR; |
| uprv_free(myEnum); |
| return NULL; |
| } |
| *myContext = 0; |
| myEnum->context = myContext; |
| } |
| return myEnum; |
| } |
| |
| U_CFUNC uint16_t |
| ucnv_io_countKnownConverters(UErrorCode *pErrorCode) { |
| if (haveAliasData(pErrorCode)) { |
| return (uint16_t)gMainTable.converterListSize; |
| } |
| return 0; |
| } |
| |
| /* alias table swapping ----------------------------------------------------- */ |
| |
| typedef char * U_CALLCONV StripForCompareFn(char *dst, const char *name); |
| |
| /* |
| * row of a temporary array |
| * |
| * gets platform-endian charset string indexes and sorting indexes; |
| * after sorting this array by strings, the actual arrays are permutated |
| * according to the sorting indexes |
| */ |
| typedef struct TempRow { |
| uint16_t strIndex, sortIndex; |
| } TempRow; |
| |
| typedef struct TempAliasTable { |
| const char *chars; |
| TempRow *rows; |
| uint16_t *resort; |
| StripForCompareFn *stripForCompare; |
| } TempAliasTable; |
| |
| enum { |
| STACK_ROW_CAPACITY=500 |
| }; |
| |
| static int32_t |
| io_compareRows(const void *context, const void *left, const void *right) { |
| char strippedLeft[UCNV_MAX_CONVERTER_NAME_LENGTH], |
| strippedRight[UCNV_MAX_CONVERTER_NAME_LENGTH]; |
| |
| TempAliasTable *tempTable=(TempAliasTable *)context; |
| const char *chars=tempTable->chars; |
| |
| return (int32_t)uprv_strcmp(tempTable->stripForCompare(strippedLeft, chars+2*((const TempRow *)left)->strIndex), |
| tempTable->stripForCompare(strippedRight, chars+2*((const TempRow *)right)->strIndex)); |
| } |
| |
| U_CAPI int32_t U_EXPORT2 |
| ucnv_swapAliases(const UDataSwapper *ds, |
| const void *inData, int32_t length, void *outData, |
| UErrorCode *pErrorCode) { |
| const UDataInfo *pInfo; |
| int32_t headerSize; |
| |
| const uint16_t *inTable; |
| const uint32_t *inSectionSizes; |
| uint32_t toc[offsetsCount]; |
| uint32_t offsets[offsetsCount]; /* 16-bit-addressed offsets from inTable/outTable */ |
| uint32_t i, count, tocLength, topOffset; |
| |
| TempRow rows[STACK_ROW_CAPACITY]; |
| uint16_t resort[STACK_ROW_CAPACITY]; |
| TempAliasTable tempTable; |
| |
| /* 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]==0x43 && /* dataFormat="CvAl" */ |
| pInfo->dataFormat[1]==0x76 && |
| pInfo->dataFormat[2]==0x41 && |
| pInfo->dataFormat[3]==0x6c && |
| pInfo->formatVersion[0]==3 |
| )) { |
| udata_printError(ds, "ucnv_swapAliases(): data format %02x.%02x.%02x.%02x (format version %02x) is not an alias table\n", |
| pInfo->dataFormat[0], pInfo->dataFormat[1], |
| pInfo->dataFormat[2], pInfo->dataFormat[3], |
| pInfo->formatVersion[0]); |
| *pErrorCode=U_UNSUPPORTED_ERROR; |
| return 0; |
| } |
| |
| /* an alias table must contain at least the table of contents array */ |
| if(length>=0 && (length-headerSize)<4*(1+minTocLength)) { |
| udata_printError(ds, "ucnv_swapAliases(): too few bytes (%d after header) for an alias table\n", |
| length-headerSize); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| inSectionSizes=(const uint32_t *)((const char *)inData+headerSize); |
| inTable=(const uint16_t *)inSectionSizes; |
| uprv_memset(toc, 0, sizeof(toc)); |
| toc[tocLengthIndex]=tocLength=ds->readUInt32(inSectionSizes[tocLengthIndex]); |
| if(tocLength<minTocLength || offsetsCount<=tocLength) { |
| udata_printError(ds, "ucnv_swapAliases(): table of contents contains unsupported number of sections (%u sections)\n", tocLength); |
| *pErrorCode=U_INVALID_FORMAT_ERROR; |
| return 0; |
| } |
| |
| /* read the known part of the table of contents */ |
| for(i=converterListIndex; i<=tocLength; ++i) { |
| toc[i]=ds->readUInt32(inSectionSizes[i]); |
| } |
| |
| /* compute offsets */ |
| uprv_memset(offsets, 0, sizeof(offsets)); |
| offsets[converterListIndex]=2*(1+tocLength); /* count two 16-bit units per toc entry */ |
| for(i=tagListIndex; i<=tocLength; ++i) { |
| offsets[i]=offsets[i-1]+toc[i-1]; |
| } |
| |
| /* compute the overall size of the after-header data, in numbers of 16-bit units */ |
| topOffset=offsets[i-1]+toc[i-1]; |
| |
| if(length>=0) { |
| uint16_t *outTable; |
| const uint16_t *p, *p2; |
| uint16_t *q, *q2; |
| uint16_t oldIndex; |
| |
| if((length-headerSize)<(2*(int32_t)topOffset)) { |
| udata_printError(ds, "ucnv_swapAliases(): too few bytes (%d after header) for an alias table\n", |
| length-headerSize); |
| *pErrorCode=U_INDEX_OUTOFBOUNDS_ERROR; |
| return 0; |
| } |
| |
| outTable=(uint16_t *)((char *)outData+headerSize); |
| |
| /* swap the entire table of contents */ |
| ds->swapArray32(ds, inTable, 4*(1+tocLength), outTable, pErrorCode); |
| |
| /* swap unormalized strings & normalized strings */ |
| ds->swapInvChars(ds, inTable+offsets[stringTableIndex], 2*(int32_t)(toc[stringTableIndex]+toc[normalizedStringTableIndex]), |
| outTable+offsets[stringTableIndex], pErrorCode); |
| if(U_FAILURE(*pErrorCode)) { |
| udata_printError(ds, "ucnv_swapAliases().swapInvChars(charset names) failed\n"); |
| return 0; |
| } |
| |
| if(ds->inCharset==ds->outCharset) { |
| /* no need to sort, just swap all 16-bit values together */ |
| ds->swapArray16(ds, |
| inTable+offsets[converterListIndex], |
| 2*(int32_t)(offsets[stringTableIndex]-offsets[converterListIndex]), |
| outTable+offsets[converterListIndex], |
| pErrorCode); |
| } else { |
| /* allocate the temporary table for sorting */ |
| count=toc[aliasListIndex]; |
| |
| tempTable.chars=(const char *)(outTable+offsets[stringTableIndex]); /* sort by outCharset */ |
| |
| if(count<=STACK_ROW_CAPACITY) { |
| tempTable.rows=rows; |
| tempTable.resort=resort; |
| } else { |
| tempTable.rows=(TempRow *)uprv_malloc(count*sizeof(TempRow)+count*2); |
| if(tempTable.rows==NULL) { |
| udata_printError(ds, "ucnv_swapAliases(): unable to allocate memory for sorting tables (max length: %u)\n", |
| count); |
| *pErrorCode=U_MEMORY_ALLOCATION_ERROR; |
| return 0; |
| } |
| tempTable.resort=(uint16_t *)(tempTable.rows+count); |
| } |
| |
| if(ds->outCharset==U_ASCII_FAMILY) { |
| tempTable.stripForCompare=ucnv_io_stripASCIIForCompare; |
| } else /* U_EBCDIC_FAMILY */ { |
| tempTable.stripForCompare=ucnv_io_stripEBCDICForCompare; |
| } |
| |
| /* |
| * Sort unique aliases+mapped names. |
| * |
| * We need to sort the list again by outCharset strings because they |
| * sort differently for different charset families. |
| * First we set up a temporary table with the string indexes and |
| * sorting indexes and sort that. |
| * Then we permutate and copy/swap the actual values. |
| */ |
| p=inTable+offsets[aliasListIndex]; |
| q=outTable+offsets[aliasListIndex]; |
| |
| p2=inTable+offsets[untaggedConvArrayIndex]; |
| q2=outTable+offsets[untaggedConvArrayIndex]; |
| |
| for(i=0; i<count; ++i) { |
| tempTable.rows[i].strIndex=ds->readUInt16(p[i]); |
| tempTable.rows[i].sortIndex=(uint16_t)i; |
| } |
| |
| uprv_sortArray(tempTable.rows, (int32_t)count, sizeof(TempRow), |
| io_compareRows, &tempTable, |
| FALSE, pErrorCode); |
| |
| if(U_SUCCESS(*pErrorCode)) { |
| /* copy/swap/permutate items */ |
| if(p!=q) { |
| for(i=0; i<count; ++i) { |
| oldIndex=tempTable.rows[i].sortIndex; |
| ds->swapArray16(ds, p+oldIndex, 2, q+i, pErrorCode); |
| ds->swapArray16(ds, p2+oldIndex, 2, q2+i, pErrorCode); |
| } |
| } else { |
| /* |
| * If we swap in-place, then the permutation must use another |
| * temporary array (tempTable.resort) |
| * before the results are copied to the outBundle. |
| */ |
| uint16_t *r=tempTable.resort; |
| |
| for(i=0; i<count; ++i) { |
| oldIndex=tempTable.rows[i].sortIndex; |
| ds->swapArray16(ds, p+oldIndex, 2, r+i, pErrorCode); |
| } |
| uprv_memcpy(q, r, 2*count); |
| |
| for(i=0; i<count; ++i) { |
| oldIndex=tempTable.rows[i].sortIndex; |
| ds->swapArray16(ds, p2+oldIndex, 2, r+i, pErrorCode); |
| } |
| uprv_memcpy(q2, r, 2*count); |
| } |
| } |
| |
| if(tempTable.rows!=rows) { |
| uprv_free(tempTable.rows); |
| } |
| |
| if(U_FAILURE(*pErrorCode)) { |
| udata_printError(ds, "ucnv_swapAliases().uprv_sortArray(%u items) failed\n", |
| count); |
| return 0; |
| } |
| |
| /* swap remaining 16-bit values */ |
| ds->swapArray16(ds, |
| inTable+offsets[converterListIndex], |
| 2*(int32_t)(offsets[aliasListIndex]-offsets[converterListIndex]), |
| outTable+offsets[converterListIndex], |
| pErrorCode); |
| ds->swapArray16(ds, |
| inTable+offsets[taggedAliasArrayIndex], |
| 2*(int32_t)(offsets[stringTableIndex]-offsets[taggedAliasArrayIndex]), |
| outTable+offsets[taggedAliasArrayIndex], |
| pErrorCode); |
| } |
| } |
| |
| return headerSize+2*(int32_t)topOffset; |
| } |
| |
| #endif |
| |
| /* |
| * Hey, Emacs, please set the following: |
| * |
| * Local Variables: |
| * indent-tabs-mode: nil |
| * End: |
| * |
| */ |
