U_NAMESPACE_BEGIN
U_CFUNC UChar U_CALLCONV
uregex_utext_unescape_charAt(int32_t offset, void *ct) {
struct URegexUTextUnescapeCharContext *context = (struct URegexUTextUnescapeCharContext *)ct;
UChar32 c;
if (offset == context->lastOffset + 1) {
c = UTEXT_NEXT32(context->text);
context->lastOffset++;
} else if (offset == context->lastOffset) {
c = UTEXT_PREVIOUS32(context->text);
UTEXT_NEXT32(context->text);
} else {
utext_moveIndex32(context->text, offset - context->lastOffset - 1);
c = UTEXT_NEXT32(context->text);
context->lastOffset = offset;
}
// !!!: Doesn't handle characters outside BMP
if (U_IS_BMP(c)) {
return (UChar)c;
} else {
return 0;
}
}
//-----------------------------------------------------------------------------------
//
// handlePrevious()
//
// Iterate backwards, according to the logic of the reverse rules.
// This version handles the exact style backwards rules.
//
// The logic of this function is very similar to handleNext(), above.
//
//-----------------------------------------------------------------------------------
int32_t BreakIterator::handlePrevious(const RBBIStateTable *statetable) {
int32_t state;
int16_t category = 0;
RBBIRunMode mode;
RBBIStateTableRow *row;
UChar32 c;
int32_t lookaheadStatus = 0;
int32_t result = 0;
int32_t initialPosition = 0;
int32_t lookaheadResult = 0;
UBool lookAheadHardBreak = (statetable->fFlags & RBBI_LOOKAHEAD_HARD_BREAK) != 0;
#ifdef RBBI_DEBUG
if (fTrace) {
RBBIDebugPuts("Handle Previous pos char state category");
}
#endif
// handlePrevious() never gets the rule status.
// Flag the status as invalid; if the user ever asks for status, we will need
// to back up, then re-find the break position using handleNext(), which does
// get the status value.
fLastStatusIndexValid = FALSE;
fLastRuleStatusIndex = 0;
// if we're already at the start of the text, return DONE.
if (fText == NULL || fData == NULL || UTEXT_GETNATIVEINDEX(fText)==0) {
return BreakIterator::DONE;
}
// Set up the starting char.
initialPosition = (int32_t)UTEXT_GETNATIVEINDEX(fText);
result = initialPosition;
c = UTEXT_PREVIOUS32(fText);
// Set the initial state for the state machine
state = START_STATE;
row = (RBBIStateTableRow *)
(statetable->fTableData + (statetable->fRowLen * state));
category = 3;
mode = RBBI_RUN;
if (statetable->fFlags & RBBI_BOF_REQUIRED) {
category = 2;
mode = RBBI_START;
}
// loop until we reach the start of the text or transition to state 0
//
for (;;) {
if (c == U_SENTINEL) {
// Reached end of input string.
if (mode == RBBI_END ||
*(int32_t *)fHeader->fFormatVersion == 1 ) {
// We have already run the loop one last time with the
// character set to the psueudo {eof} value. Now it is time
// to unconditionally bail out.
// (Or we have an old format binary rule file that does not support {eof}.)
if (lookaheadResult < result) {
// We ran off the end of the string with a pending look-ahead match.
// Treat this as if the look-ahead condition had been met, and return
// the match at the / position from the look-ahead rule.
result = lookaheadResult;
lookaheadStatus = 0;
} else if (result == initialPosition) {
// Ran off start, no match found.
// move one index one (towards the start, since we are doing a previous())
UTEXT_SETNATIVEINDEX(fText, initialPosition);
UTEXT_PREVIOUS32(fText); // TODO: shouldn't be necessary. We're already at beginning. Check.
}
break;
}
// Run the loop one last time with the fake end-of-input character category.
mode = RBBI_END;
category = 1;
}
//
// Get the char category. An incoming category of 1 or 2 means that
// we are preset for doing the beginning or end of input, and
// that we shouldn't get a category from an actual text input character.
//
if (mode == RBBI_RUN) {
// look up the current character's character category, which tells us
// which column in the state table to look at.
// Note: the 16 in UTRIE_GET16 refers to the size of the data being returned,
// not the size of the character going in, which is a UChar32.
//
UTRIE_GET16(&fTrie, c, category);
// Check the dictionary bit in the character's category.
// Counter is only used by dictionary based iterators (subclasses).
// Chars that need to be handled by a dictionary have a flag bit set
// in their category values.
//
if ((category & 0x4000) != 0) {
fDictionaryCharCount++;
// And off the dictionary flag bit.
category &= ~0x4000;
}
}
#ifdef RBBI_DEBUG
if (fTrace) {
RBBIDebugPrintf(" %4d ", (int32_t)utext_getNativeIndex(fText));
if (0x20<=c && c<0x7f) {
RBBIDebugPrintf("\"%c\" ", c);
} else {
RBBIDebugPrintf("%5x ", c);
}
RBBIDebugPrintf("%3d %3d\n", state, category);
}
#endif
// State Transition - move machine to its next state
//
state = row->fNextState[category];
row = (RBBIStateTableRow *)
(statetable->fTableData + (statetable->fRowLen * state));
if (row->fAccepting == -1) {
// Match found, common case.
result = (int32_t)UTEXT_GETNATIVEINDEX(fText);
}
if (row->fLookAhead != 0) {
if (lookaheadStatus != 0
&& row->fAccepting == lookaheadStatus) {
// Lookahead match is completed.
result = lookaheadResult;
lookaheadStatus = 0;
// TODO: make a standalone hard break in a rule work.
if (lookAheadHardBreak) {
UTEXT_SETNATIVEINDEX(fText, result);
return result;
}
// Look-ahead completed, but other rules may match further. Continue on
// TODO: junk this feature? I don't think it's used anywhwere.
goto continueOn;
}
int32_t r = (int32_t)UTEXT_GETNATIVEINDEX(fText);
lookaheadResult = r;
lookaheadStatus = row->fLookAhead;
goto continueOn;
}
if (row->fAccepting != 0) {
// Because this is an accepting state, any in-progress look-ahead match
// is no longer relavant. Clear out the pending lookahead status.
lookaheadStatus = 0;
}
continueOn:
if (state == STOP_STATE) {
// This is the normal exit from the lookup state machine.
// We have advanced through the string until it is certain that no
// longer match is possible, no matter what characters follow.
break;
}
// Move (backwards) to the next character to process.
// If this is a beginning-of-input loop iteration, don't advance
// the input position. The next iteration will be processing the
// first real input character.
if (mode == RBBI_RUN) {
c = UTEXT_PREVIOUS32(fText);
} else {
if (mode == RBBI_START) {
mode = RBBI_RUN;
}
}
}
// The state machine is done. Check whether it found a match...
// If the iterator failed to advance in the match engine, force it ahead by one.
// (This really indicates a defect in the break rules. They should always match
// at least one character.)
if (result == initialPosition) {
UTEXT_SETNATIVEINDEX(fText, initialPosition);
UTEXT_PREVIOUS32(fText);
result = (int32_t)UTEXT_GETNATIVEINDEX(fText);
}
// Leave the iterator at our result position.
UTEXT_SETNATIVEINDEX(fText, result);
#ifdef RBBI_DEBUG
if (fTrace) {
RBBIDebugPrintf("result = %d\n\n", result);
}
#endif
return result;
}
/**
* Sets the iterator to refer to the last boundary position before the
* specified position.
* @offset The position to begin searching for a break from.
* @return The position of the last boundary before the starting position.
*/
int32_t BreakIterator::preceding(int32_t offset) {
// if we have cached break positions and offset is in the range
// covered by them, use them
if (fCachedBreakPositions != NULL) {
// TODO: binary search?
// TODO: What if offset is outside range, but break is not?
if (offset > fCachedBreakPositions[0]
&& offset <= fCachedBreakPositions[fNumCachedBreakPositions - 1]) {
fPositionInCache = 0;
while (fPositionInCache < fNumCachedBreakPositions
&& offset > fCachedBreakPositions[fPositionInCache])
++fPositionInCache;
--fPositionInCache;
// If we're at the beginning of the cache, need to reevaluate the
// rule status
if (fPositionInCache <= 0) {
fLastStatusIndexValid = FALSE;
}
utext_setNativeIndex(fText, fCachedBreakPositions[fPositionInCache]);
return fCachedBreakPositions[fPositionInCache];
}
else {
reset();
}
}
// if the offset passed in is already past the end of the text,
// just return DONE; if it's before the beginning, return the
// text's starting offset
if (fText == NULL || offset > utext_nativeLength(fText)) {
// return BreakIterator::DONE;
return last();
}
else if (offset < 0) {
return first();
}
// if we start by updating the current iteration position to the
// position specified by the caller, we can just use previous()
// to carry out this operation
if (fSafeFwdTable != NULL) {
// new rule syntax
utext_setNativeIndex(fText, offset);
int32_t newOffset = (int32_t)UTEXT_GETNATIVEINDEX(fText);
if (newOffset != offset) {
// Will come here if specified offset was not a code point boundary AND
// the underlying implmentation is using UText, which snaps any non-code-point-boundary
// indices to the containing code point.
// For breakitereator::preceding only, these non-code-point indices need to be moved
// up to refer to the following codepoint.
UTEXT_NEXT32(fText);
offset = (int32_t)UTEXT_GETNATIVEINDEX(fText);
}
// TODO: (synwee) would it be better to just check for being in the middle of a surrogate pair,
// rather than adjusting the position unconditionally?
// (Change would interact with safe rules.)
// TODO: change RBBI behavior for off-boundary indices to match that of UText?
// affects only preceding(), seems cleaner, but is slightly different.
UTEXT_PREVIOUS32(fText);
handleNext(fSafeFwdTable);
int32_t result = (int32_t)UTEXT_GETNATIVEINDEX(fText);
while (result >= offset) {
result = previous();
}
return result;
}
if (fSafeRevTable != NULL) {
// backup plan if forward safe table is not available
// TODO: check whether this path can be discarded
// It's probably OK to say that rules must supply both safe tables
// if they use safe tables at all. We have certainly never described
// to anyone how to work with just one safe table.
utext_setNativeIndex(fText, offset);
UTEXT_NEXT32(fText);
// handle previous will give result <= offset
handlePrevious(fSafeRevTable);
// next will give result 0 or 1 boundary away from offset,
// most of the time
// we have to
int32_t oldresult = next();
while (oldresult < offset) {
int32_t result = next();
if (result >= offset) {
return oldresult;
}
oldresult = result;
}
int32_t result = previous();
if (result >= offset) {
return previous();
}
return result;
}
// old rule syntax
utext_setNativeIndex(fText, offset);
return previous();
}
/**
* Sets the iterator to refer to the first boundary position following
* the specified position.
* @offset The position from which to begin searching for a break position.
* @return The position of the first break after the current position.
*/
int32_t BreakIterator::following(int32_t offset) {
// if we have cached break positions and offset is in the range
// covered by them, use them
// TODO: could use binary search
// TODO: what if offset is outside range, but break is not?
if (fCachedBreakPositions != NULL) {
if (offset >= fCachedBreakPositions[0]
&& offset < fCachedBreakPositions[fNumCachedBreakPositions - 1]) {
fPositionInCache = 0;
// We are guaranteed not to leave the array due to range test above
while (offset >= fCachedBreakPositions[fPositionInCache]) {
++fPositionInCache;
}
int32_t pos = fCachedBreakPositions[fPositionInCache];
utext_setNativeIndex(fText, pos);
return pos;
}
else {
reset();
}
}
// if the offset passed in is already past the end of the text,
// just return DONE; if it's before the beginning, return the
// text's starting offset
fLastRuleStatusIndex = 0;
fLastStatusIndexValid = TRUE;
if (fText == NULL || offset >= utext_nativeLength(fText)) {
last();
return next();
}
else if (offset < 0) {
return first();
}
// otherwise, set our internal iteration position (temporarily)
// to the position passed in. If this is the _beginning_ position,
// then we can just use next() to get our return value
int32_t result = 0;
if (fSafeRevTable != NULL) {
// new rule syntax
utext_setNativeIndex(fText, offset);
// move forward one codepoint to prepare for moving back to a
// safe point.
// this handles offset being between a supplementary character
UTEXT_NEXT32(fText);
// handlePrevious will move most of the time to < 1 boundary away
handlePrevious(fSafeRevTable);
int32_t result = next();
while (result <= offset) {
result = next();
}
return result;
}
if (fSafeFwdTable != NULL) {
// backup plan if forward safe table is not available
utext_setNativeIndex(fText, offset);
UTEXT_PREVIOUS32(fText);
// handle next will give result >= offset
handleNext(fSafeFwdTable);
// previous will give result 0 or 1 boundary away from offset,
// most of the time
// we have to
int32_t oldresult = previous();
while (oldresult > offset) {
int32_t result = previous();
if (result <= offset) {
return oldresult;
}
oldresult = result;
}
int32_t result = next();
if (result <= offset) {
return next();
}
return result;
}
// otherwise, we have to sync up first. Use handlePrevious() to back
// up to a known break position before the specified position (if
// we can determine that the specified position is a break position,
// we don't back up at all). This may or may not be the last break
// position at or before our starting position. Advance forward
// from here until we've passed the starting position. The position
// we stop on will be the first break position after the specified one.
// old rule syntax
utext_setNativeIndex(fText, offset);
if (offset==0 ||
offset==1 && utext_getNativeIndex(fText)==0) {
return next();
}
result = previous();
while (result != BreakIterator::DONE && result <= offset) {
result = next();
}
return result;
}
/**
* Advances the iterator backwards, to the last boundary preceding this one.
* @return The position of the last boundary position preceding this one.
*/
int32_t BreakIterator::previous(void) {
int32_t result;
int32_t startPos;
// if we have cached break positions and we're still in the range
// covered by them, just move one step backward in the cache
if (fCachedBreakPositions != NULL) {
if (fPositionInCache > 0) {
--fPositionInCache;
// If we're at the beginning of the cache, need to reevaluate the
// rule status
if (fPositionInCache <= 0) {
fLastStatusIndexValid = FALSE;
}
int32_t pos = fCachedBreakPositions[fPositionInCache];
utext_setNativeIndex(fText, pos);
return pos;
}
else {
reset();
}
}
// if we're already sitting at the beginning of the text, return DONE
if (fText == NULL || (startPos = current()) == 0) {
fLastRuleStatusIndex = 0;
fLastStatusIndexValid = TRUE;
return BreakIterator::DONE;
}
if (fSafeRevTable != NULL || fSafeFwdTable != NULL) {
result = handlePrevious(fReverseTable);
if (fDictionaryCharCount > 0) {
result = checkDictionary(result, startPos, TRUE);
}
return result;
}
// old rule syntax
// set things up. handlePrevious() will back us up to some valid
// break position before the current position (we back our internal
// iterator up one step to prevent handlePrevious() from returning
// the current position), but not necessarily the last one before
// where we started
int32_t start = current();
UTEXT_PREVIOUS32(fText);
int32_t lastResult = handlePrevious(fReverseTable);
if (lastResult == UBRK_DONE) {
lastResult = 0;
utext_setNativeIndex(fText, 0);
}
result = lastResult;
int32_t lastTag = 0;
UBool breakTagValid = FALSE;
// iterate forward from the known break position until we pass our
// starting point. The last break position before the starting
// point is our return value
for (;;) {
result = next();
if (result == BreakIterator::DONE || result >= start) {
break;
}
lastResult = result;
lastTag = fLastRuleStatusIndex;
breakTagValid = TRUE;
}
// fLastBreakTag wants to have the value for section of text preceding
// the result position that we are to return (in lastResult.) If
// the backwards rules overshot and the above loop had to do two or more
// next()s to move up to the desired return position, we will have a valid
// tag value. But, if handlePrevious() took us to exactly the correct result positon,
// we wont have a tag value for that position, which is only set by handleNext().
// set the current iteration position to be the last break position
// before where we started, and then return that value
utext_setNativeIndex(fText, lastResult);
fLastRuleStatusIndex = lastTag; // for use by getRuleStatus()
fLastStatusIndexValid = breakTagValid;
// No need to check the dictionary; it will have been handled by
// next()
return lastResult;
}
//-------------------------------------------------------------------------------
//
// checkDictionary This function handles all processing of characters in
// the "dictionary" set. It will determine the appropriate
// course of action, and possibly set up a cache in the
// process.
//
//-------------------------------------------------------------------------------
int32_t BreakIterator::checkDictionary(int32_t startPos,
int32_t endPos,
UBool reverse) {
#if 1
return reverse ? startPos : endPos;
#else
// Reset the old break cache first.
uint32_t dictionaryCount = fDictionaryCharCount;
reset();
if (dictionaryCount <= 1 || (endPos - startPos) <= 1) {
return (reverse ? startPos : endPos);
}
// Starting from the starting point, scan towards the proposed result,
// looking for the first dictionary character (which may be the one
// we're on, if we're starting in the middle of a range).
utext_setNativeIndex(fText, reverse ? endPos : startPos);
if (reverse) {
UTEXT_PREVIOUS32(fText);
}
int32_t rangeStart = startPos;
int32_t rangeEnd = endPos;
uint16_t category;
int32_t current;
UErrorCode status = U_ZERO_ERROR;
UStack breaks(status);
int32_t foundBreakCount = 0;
UChar32 c = utext_current32(fText);
UTRIE_GET16(&fData->fTrie, c, category);
// Is the character we're starting on a dictionary character? If so, we
// need to back up to include the entire run; otherwise the results of
// the break algorithm will differ depending on where we start. Since
// the result is cached and there is typically a non-dictionary break
// within a small number of words, there should be little performance impact.
if (category & 0x4000) {
if (reverse) {
do {
utext_next32(fText); // TODO: recast to work directly with postincrement.
c = utext_current32(fText);
UTRIE_GET16(&fData->fTrie, c, category);
} while (c != U_SENTINEL && (category & 0x4000));
// Back up to the last dictionary character
rangeEnd = (int32_t)UTEXT_GETNATIVEINDEX(fText);
if (c == U_SENTINEL) {
// c = fText->last32();
// TODO: why was this if needed?
c = UTEXT_PREVIOUS32(fText);
}
else {
c = UTEXT_PREVIOUS32(fText);
}
}
else {
do {
c = UTEXT_PREVIOUS32(fText);
UTRIE_GET16(&fData->fTrie, c, category);
}
while (c != U_SENTINEL && (category & 0x4000));
// Back up to the last dictionary character
if (c == U_SENTINEL) {
// c = fText->first32();
c = utext_current32(fText);
}
else {
utext_next32(fText);
c = utext_current32(fText);
}
rangeStart = (int32_t)UTEXT_GETNATIVEINDEX(fText);;
}
UTRIE_GET16(&fData->fTrie, c, category);
}
// Loop through the text, looking for ranges of dictionary characters.
// For each span, find the appropriate break engine, and ask it to find
// any breaks within the span.
// Note: we always do this in the forward direction, so that the break
// cache is built in the right order.
if (reverse) {
utext_setNativeIndex(fText, rangeStart);
c = utext_current32(fText);
UTRIE_GET16(&fData->fTrie, c, category);
}
while(U_SUCCESS(status)) {
while((current = (int32_t)UTEXT_GETNATIVEINDEX(fText)) < rangeEnd && (category & 0x4000) == 0) {
utext_next32(fText); // TODO: tweak for post-increment operation
c = utext_current32(fText);
UTRIE_GET16(&fData->fTrie, c, category);
}
if (current >= rangeEnd) {
break;
}
// We now have a dictionary character. Get the appropriate language object
// to deal with it.
const LanguageBreakEngine *lbe = getLanguageBreakEngine(c);
// Ask the language object if there are any breaks. It will leave the text
// pointer on the other side of its range, ready to search for the next one.
if (lbe != NULL) {
foundBreakCount += lbe->findBreaks(fText, rangeStart, rangeEnd, FALSE, fBreakType, breaks);
}
// Reload the loop variables for the next go-round
c = utext_current32(fText);
UTRIE_GET16(&fData->fTrie, c, category);
}
// If we found breaks, build a new break cache. The first and last entries must
// be the original starting and ending position.
if (foundBreakCount > 0) {
int32_t totalBreaks = foundBreakCount;
if (startPos < breaks.elementAti(0)) {
totalBreaks += 1;
}
if (endPos > breaks.peeki()) {
totalBreaks += 1;
}
fCachedBreakPositions = (int32_t *)uprv_malloc(totalBreaks * sizeof(int32_t));
if (fCachedBreakPositions != NULL) {
int32_t out = 0;
fNumCachedBreakPositions = totalBreaks;
if (startPos < breaks.elementAti(0)) {
fCachedBreakPositions[out++] = startPos;
}
for (int32_t i = 0; i < foundBreakCount; ++i) {
fCachedBreakPositions[out++] = breaks.elementAti(i);
}
if (endPos > fCachedBreakPositions[out-1]) {
fCachedBreakPositions[out] = endPos;
}
// If there are breaks, then by definition, we are replacing the original
// proposed break by one of the breaks we found. Use following() and
// preceding() to do the work. They should never recurse in this case.
if (reverse) {
return preceding(endPos - 1);
}
else {
return following(startPos);
}
}
// If the allocation failed, just fall through to the "no breaks found" case.
}
// If we get here, there were no language-based breaks. Set the text pointer
// to the original proposed break.
utext_setNativeIndex(fText, reverse ? startPos : endPos);
return (reverse ? startPos : endPos);
#endif
}
static void TestAPI(void) {
UErrorCode status = U_ZERO_ERROR;
UBool gFailed = FALSE;
(void)gFailed; /* Suppress set but not used warning. */
/* Open */
{
UText utLoc = UTEXT_INITIALIZER;
const char * cString = "\x61\x62\x63\x64";
UChar uString[] = {0x41, 0x42, 0x43, 0};
UText *uta;
UText *utb;
UChar c;
uta = utext_openUChars(NULL, uString, -1, &status);
TEST_SUCCESS(status);
c = utext_next32(uta);
TEST_ASSERT(c == 0x41);
utb = utext_close(uta);
TEST_ASSERT(utb == NULL);
uta = utext_openUTF8(&utLoc, cString, -1, &status);
TEST_SUCCESS(status);
TEST_ASSERT(uta == &utLoc);
uta = utext_close(&utLoc);
TEST_ASSERT(uta == &utLoc);
}
/* utext_clone() */
{
UChar uString[] = {0x41, 0x42, 0x43, 0};
int64_t len;
UText *uta;
UText *utb;
status = U_ZERO_ERROR;
uta = utext_openUChars(NULL, uString, -1, &status);
TEST_SUCCESS(status);
utb = utext_clone(NULL, uta, FALSE, FALSE, &status);
TEST_SUCCESS(status);
TEST_ASSERT(utb != NULL);
TEST_ASSERT(utb != uta);
len = utext_nativeLength(uta);
TEST_ASSERT(len == u_strlen(uString));
utext_close(uta);
utext_close(utb);
}
/* basic access functions */
{
UChar uString[] = {0x41, 0x42, 0x43, 0};
UText *uta;
UChar32 c;
int64_t len;
UBool b;
int64_t i;
status = U_ZERO_ERROR;
uta = utext_openUChars(NULL, uString, -1, &status);
TEST_ASSERT(uta!=NULL);
TEST_SUCCESS(status);
b = utext_isLengthExpensive(uta);
TEST_ASSERT(b==TRUE);
len = utext_nativeLength(uta);
TEST_ASSERT(len == u_strlen(uString));
b = utext_isLengthExpensive(uta);
TEST_ASSERT(b==FALSE);
c = utext_char32At(uta, 0);
TEST_ASSERT(c==uString[0]);
c = utext_current32(uta);
TEST_ASSERT(c==uString[0]);
c = utext_next32(uta);
TEST_ASSERT(c==uString[0]);
c = utext_current32(uta);
TEST_ASSERT(c==uString[1]);
c = utext_previous32(uta);
TEST_ASSERT(c==uString[0]);
c = utext_current32(uta);
TEST_ASSERT(c==uString[0]);
c = utext_next32From(uta, 1);
TEST_ASSERT(c==uString[1]);
c = utext_next32From(uta, u_strlen(uString));
TEST_ASSERT(c==U_SENTINEL);
c = utext_previous32From(uta, 2);
TEST_ASSERT(c==uString[1]);
i = utext_getNativeIndex(uta);
TEST_ASSERT(i == 1);
utext_setNativeIndex(uta, 0);
b = utext_moveIndex32(uta, 1);
TEST_ASSERT(b==TRUE);
i = utext_getNativeIndex(uta);
TEST_ASSERT(i==1);
b = utext_moveIndex32(uta, u_strlen(uString)-1);
TEST_ASSERT(b==TRUE);
i = utext_getNativeIndex(uta);
TEST_ASSERT(i==u_strlen(uString));
b = utext_moveIndex32(uta, 1);
TEST_ASSERT(b==FALSE);
i = utext_getNativeIndex(uta);
TEST_ASSERT(i==u_strlen(uString));
utext_setNativeIndex(uta, 0);
c = UTEXT_NEXT32(uta);
TEST_ASSERT(c==uString[0]);
c = utext_current32(uta);
TEST_ASSERT(c==uString[1]);
c = UTEXT_PREVIOUS32(uta);
TEST_ASSERT(c==uString[0]);
c = UTEXT_PREVIOUS32(uta);
TEST_ASSERT(c==U_SENTINEL);
utext_close(uta);
}
{
/*
* UText opened on a NULL string with zero length
*/
UText *uta;
UChar32 c;
status = U_ZERO_ERROR;
uta = utext_openUChars(NULL, NULL, 0, &status);
TEST_SUCCESS(status);
c = UTEXT_NEXT32(uta);
TEST_ASSERT(c == U_SENTINEL);
utext_close(uta);
uta = utext_openUTF8(NULL, NULL, 0, &status);
TEST_SUCCESS(status);
c = UTEXT_NEXT32(uta);
TEST_ASSERT(c == U_SENTINEL);
utext_close(uta);
}
{
/*
* extract
*/
UText *uta;
UChar uString[] = {0x41, 0x42, 0x43, 0};
UChar buf[100];
int32_t i;
/* Test pinning of input bounds */
UChar uString2[] = {0x41, 0x42, 0x43, 0x44, 0x45,
0x46, 0x47, 0x48, 0x49, 0x4A, 0};
UChar * uString2Ptr = uString2 + 5;
status = U_ZERO_ERROR;
uta = utext_openUChars(NULL, uString, -1, &status);
TEST_SUCCESS(status);
status = U_ZERO_ERROR;
i = utext_extract(uta, 0, 100, NULL, 0, &status);
TEST_ASSERT(status==U_BUFFER_OVERFLOW_ERROR);
TEST_ASSERT(i == u_strlen(uString));
status = U_ZERO_ERROR;
memset(buf, 0, sizeof(buf));
i = utext_extract(uta, 0, 100, buf, 100, &status);
TEST_SUCCESS(status);
TEST_ASSERT(i == u_strlen(uString));
i = u_strcmp(uString, buf);
TEST_ASSERT(i == 0);
utext_close(uta);
/* Test pinning of input bounds */
status = U_ZERO_ERROR;
uta = utext_openUChars(NULL, uString2Ptr, -1, &status);
TEST_SUCCESS(status);
status = U_ZERO_ERROR;
memset(buf, 0, sizeof(buf));
i = utext_extract(uta, -3, 20, buf, 100, &status);
TEST_SUCCESS(status);
TEST_ASSERT(i == u_strlen(uString2Ptr));
i = u_strcmp(uString2Ptr, buf);
TEST_ASSERT(i == 0);
utext_close(uta);
}
{
/*
* Copy, Replace, isWritable
* Can't create an editable UText from plain C, so all we
* can easily do is check that errors returned.
*/
UText *uta;
UChar uString[] = {0x41, 0x42, 0x43, 0};
UBool b;
status = U_ZERO_ERROR;
uta = utext_openUChars(NULL, uString, -1, &status);
TEST_SUCCESS(status);
b = utext_isWritable(uta);
TEST_ASSERT(b == FALSE);
b = utext_hasMetaData(uta);
TEST_ASSERT(b == FALSE);
utext_replace(uta,
0, 1, /* start, limit */
uString, -1, /* replacement, replacement length */
&status);
TEST_ASSERT(status == U_NO_WRITE_PERMISSION);
utext_copy(uta,
0, 1, /* start, limit */
2, /* destination index */
FALSE, /* move flag */
&status);
TEST_ASSERT(status == U_NO_WRITE_PERMISSION);
utext_close(uta);
}
}