static void
createNormalizedAliasStrings(char *normalizedStrings, const char *origStringBlock, int32_t stringBlockLength) {
int32_t currStrLen;
uprv_memcpy(normalizedStrings, origStringBlock, stringBlockLength);
while ((currStrLen = (int32_t)uprv_strlen(origStringBlock)) < stringBlockLength) {
int32_t currStrSize = currStrLen + 1;
if (currStrLen > 0) {
int32_t normStrLen;
ucnv_io_stripForCompare(normalizedStrings, origStringBlock);
normStrLen = uprv_strlen(normalizedStrings);
if (normStrLen > 0) {
uprv_memset(normalizedStrings + normStrLen, 0, currStrSize - normStrLen);
}
}
stringBlockLength -= currStrSize;
normalizedStrings += currStrSize;
origStringBlock += currStrSize;
}
}
/*returns a converter type from a string
*/
static const UConverterSharedData *
getAlgorithmicTypeFromName(const char *realName)
{
uint32_t mid, start, limit;
uint32_t lastMid;
int result;
char strippedName[UCNV_MAX_CONVERTER_NAME_LENGTH];
/* Lower case and remove ignoreable characters. */
ucnv_io_stripForCompare(strippedName, realName);
/* do a binary search for the alias */
start = 0;
limit = sizeof(cnvNameType)/sizeof(cnvNameType[0]);
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;
result = uprv_strcmp(strippedName, cnvNameType[mid].name);
if (result < 0) {
limit = mid;
} else if (result > 0) {
start = mid;
} else {
return converterData[cnvNameType[mid].type];
}
}
return NULL;
}
/*
* 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;
}
