--- /dev/null
+/*
+******************************************************************************
+*
+* Copyright (C) 1999-2011, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+******************************************************************************
+*
+*
+* ucnv_io.cpp:
+* 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 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 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 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) {
+ const char *aliasTmp = alias;
+ int32_t i = 0;
+ for (i = 0; i < 2; i++) {
+ if (i == 1) {
+ /*
+ * After the first unsuccess converter lookup, check to see if
+ * the name begins with 'x-'. If it does, strip it off and try
+ * again. This behaviour is similar to how ICU4J does it.
+ */
+ if (aliasTmp[0] == 'x' || aliasTmp[1] == '-') {
+ aliasTmp = aliasTmp+2;
+ } else {
+ break;
+ }
+ }
+ if(haveAliasData(pErrorCode) && isAlias(aliasTmp, pErrorCode)) {
+ uint32_t convNum = findConverter(aliasTmp, containsOption, pErrorCode);
+ if (convNum < gMainTable.converterListSize) {
+ return GET_STRING(gMainTable.converterList[convNum]);
+ }
+ /* else converter not found */
+ } else {
+ break;
+ }
+ }
+
+ 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 = reinterpret_cast<UEnumeration *>(uprv_malloc(sizeof(UEnumeration)));
+ if (myEnum == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return NULL;
+ }
+ uprv_memcpy(myEnum, &gEnumAliases, sizeof(UEnumeration));
+ myContext = reinterpret_cast<UAliasContext *>(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 = reinterpret_cast<UEnumeration *>(uprv_malloc(sizeof(UEnumeration)));
+ if (myEnum == NULL) {
+ *pErrorCode = U_MEMORY_ALLOCATION_ERROR;
+ return NULL;
+ }
+ uprv_memcpy(myEnum, &gEnumAllConverters, sizeof(UEnumeration));
+ myContext = reinterpret_cast<uint16_t *>(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:
+ *
+ */
projects / apple / icu.git / blobdiff