/*
* 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;
}
static void
parseLine(const char *line) {
uint16_t pos=0, start, limit, length, cnv;
char *converter, *alias;
/* skip leading white space */
/* There is no whitespace at the beginning anymore */
/* while(line[pos]!=0 && isspace(line[pos])) {
++pos;
}
*/
/* is there nothing on this line? */
if(line[pos]==0) {
return;
}
/* get the converter name */
start=pos;
while(line[pos]!=0 && !isspace((int)line[pos])) {
++pos;
}
limit=pos;
/* store the converter name */
length=(uint16_t)(limit-start);
converter=allocString(&stringBlock, line+start, length);
/* add the converter to the converter table */
cnv=addConverter(converter);
/* The name itself may be tagged, so let's added it to the aliases list properly */
pos = start;
/* get all the real aliases */
for(;;) {
/* skip white space */
while(line[pos]!=0 && isspace((int)line[pos])) {
++pos;
}
/* is there no more alias name on this line? */
if(line[pos]==0) {
break;
}
/* get an alias name */
start=pos;
while(line[pos]!=0 && line[pos]!='{' && !isspace((int)line[pos])) {
++pos;
}
limit=pos;
/* store the alias name */
length=(uint16_t)(limit-start);
if (start == 0) {
/* add the converter as its own alias to the alias table */
alias = converter;
addAlias(alias, ALL_TAG_NUM, cnv, TRUE);
}
else {
alias=allocString(&stringBlock, line+start, length);
addAlias(alias, ALL_TAG_NUM, cnv, FALSE);
}
addToKnownAliases(alias);
/* add the alias/converter pair to the alias table */
/* addAlias(alias, 0, cnv, FALSE);*/
/* skip whitespace */
while (line[pos] && isspace((int)line[pos])) {
++pos;
}
/* handle tags if they are present */
if (line[pos] == '{') {
++pos;
do {
start = pos;
while (line[pos] && line[pos] != '}' && !isspace((int)line[pos])) {
++pos;
}
limit = pos;
if (start != limit) {
/* add the tag to the tag table */
uint16_t tag = getTagNumber(line + start, (uint16_t)(limit - start));
addAlias(alias, tag, cnv, (UBool)(line[limit-1] == '*'));
}
while (line[pos] && isspace((int)line[pos])) {
++pos;
}
} while (line[pos] && line[pos] != '}');
if (line[pos] == '}') {
++pos;
} else {
fprintf(stderr, "%s:%d: Unterminated tag list\n", path, lineNum);
exit(U_UNMATCHED_BRACES);
}
} else {
addAlias(alias, EMPTY_TAG_NUM, cnv, (UBool)(tags[0].aliasList[cnv].aliasCount == 0));
}
}
}
static void
parseFile(FileStream *in) {
char line[MAX_LINE_SIZE];
char lastLine[MAX_LINE_SIZE];
int32_t lineSize = 0;
int32_t lastLineSize = 0;
UBool validParse = TRUE;
lineNum = 0;
/* Add the empty tag, which is for untagged aliases */
getTagNumber("", 0);
getTagNumber(ALL_TAG_STR, 3);
allocString(&stringBlock, "", 0);
/* read the list of aliases */
while (validParse) {
validParse = FALSE;
/* Read non-empty lines that don't start with a space character. */
while (T_FileStream_readLine(in, lastLine, MAX_LINE_SIZE) != NULL) {
lastLineSize = chomp(lastLine);
if (lineSize == 0 || (lastLineSize > 0 && isspace((int)*lastLine))) {
uprv_strcpy(line + lineSize, lastLine);
lineSize += lastLineSize;
} else if (lineSize > 0) {
validParse = TRUE;
break;
}
lineNum++;
}
if (validParse || lineSize > 0) {
if (isspace((int)*line)) {
fprintf(stderr, "%s:%d: error: cannot start an alias with a space\n", path, lineNum-1);
exit(U_PARSE_ERROR);
} else if (line[0] == '{') {
if (!standardTagsUsed && line[lineSize - 1] != '}') {
fprintf(stderr, "%s:%d: error: alias needs to start with a converter name\n", path, lineNum);
exit(U_PARSE_ERROR);
}
addOfficialTaggedStandards(line, lineSize);
standardTagsUsed = TRUE;
} else {
if (standardTagsUsed) {
parseLine(line);
}
else {
fprintf(stderr, "%s:%d: error: alias table needs to start a list of standard tags\n", path, lineNum);
exit(U_PARSE_ERROR);
}
}
/* Was the last line consumed */
if (lastLineSize > 0) {
uprv_strcpy(line, lastLine);
lineSize = lastLineSize;
}
else {
lineSize = 0;
}
}
lineNum++;
}
}