#include "unicode/utypes.h"
#include "unicode/putil.h"
#include "cstring.h"
#include "cmemory.h"
#include "unicode/ustring.h"
#include "unicode/unistr.h"
#include "uhash.h"
#include "ustr_imp.h"
#include "umutex.h"
#if 0
#if U_IOSTREAM_SOURCE >= 199711
#include <iostream>
using namespace std;
#elif U_IOSTREAM_SOURCE >= 198506
#include <iostream.h>
#endif
void
print(const UnicodeString& s,
const char *name)
{
UChar c;
cout << name << ":|";
for(int i = 0; i < s.length(); ++i) {
c = s[i];
if(c>= 0x007E || c < 0x0020)
cout << "[0x" << hex << s[i] << "]";
else
cout << (char) s[i];
}
cout << '|' << endl;
}
void
print(const UChar *s,
int32_t len,
const char *name)
{
UChar c;
cout << name << ":|";
for(int i = 0; i < len; ++i) {
c = s[i];
if(c>= 0x007E || c < 0x0020)
cout << "[0x" << hex << s[i] << "]";
else
cout << (char) s[i];
}
cout << '|' << endl;
}
#endif
static
inline void
us_arrayCopy(const UChar *src, int32_t srcStart,
UChar *dst, int32_t dstStart, int32_t count)
{
if(count>0) {
uprv_memmove(dst+dstStart, src+srcStart, (size_t)(count*sizeof(*src)));
}
}
U_CDECL_BEGIN
static UChar U_CALLCONV
UnicodeString_charAt(int32_t offset, void *context) {
return ((U_NAMESPACE_QUALIFIER UnicodeString*) context)->charAt(offset);
}
U_CDECL_END
U_NAMESPACE_BEGIN
Replaceable::~Replaceable() {}
Replaceable::Replaceable() {}
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UnicodeString)
UnicodeString U_EXPORT2
operator+ (const UnicodeString &s1, const UnicodeString &s2) {
return
UnicodeString(s1.length()+s2.length()+1, (UChar32)0, 0).
append(s1).
append(s2);
}
void
UnicodeString::addRef()
{ umtx_atomic_inc((int32_t *)fUnion.fFields.fArray - 1);}
int32_t
UnicodeString::removeRef()
{ return umtx_atomic_dec((int32_t *)fUnion.fFields.fArray - 1);}
int32_t
UnicodeString::refCount() const
{
umtx_lock(NULL);
int32_t count = *((int32_t *)fUnion.fFields.fArray - 1);
umtx_unlock(NULL);
return count;
}
void
UnicodeString::releaseArray() {
if((fFlags & kRefCounted) && removeRef() == 0) {
uprv_free((int32_t *)fUnion.fFields.fArray - 1);
}
}
UnicodeString::UnicodeString()
: fShortLength(0),
fFlags(kShortString)
{}
UnicodeString::UnicodeString(int32_t capacity, UChar32 c, int32_t count)
: fShortLength(0),
fFlags(0)
{
if(count <= 0 || (uint32_t)c > 0x10ffff) {
allocate(capacity);
} else {
int32_t unitCount = UTF_CHAR_LENGTH(c), length = count * unitCount;
if(capacity < length) {
capacity = length;
}
if(allocate(capacity)) {
UChar *array = getArrayStart();
int32_t i = 0;
if(unitCount == 1) {
while(i < length) {
array[i++] = (UChar)c;
}
} else {
UChar units[UTF_MAX_CHAR_LENGTH];
UTF_APPEND_CHAR_UNSAFE(units, i, c);
i = 0;
while(i < length) {
int32_t unitIdx = 0;
while(unitIdx < unitCount) {
array[i++]=units[unitIdx++];
}
}
}
}
setLength(length);
}
}
UnicodeString::UnicodeString(UChar ch)
: fShortLength(1),
fFlags(kShortString)
{
fUnion.fStackBuffer[0] = ch;
}
UnicodeString::UnicodeString(UChar32 ch)
: fShortLength(0),
fFlags(kShortString)
{
int32_t i = 0;
UBool isError = FALSE;
U16_APPEND(fUnion.fStackBuffer, i, US_STACKBUF_SIZE, ch, isError);
fShortLength = (int8_t)i;
}
UnicodeString::UnicodeString(const UChar *text)
: fShortLength(0),
fFlags(kShortString)
{
doReplace(0, 0, text, 0, -1);
}
UnicodeString::UnicodeString(const UChar *text,
int32_t textLength)
: fShortLength(0),
fFlags(kShortString)
{
doReplace(0, 0, text, 0, textLength);
}
UnicodeString::UnicodeString(UBool isTerminated,
const UChar *text,
int32_t textLength)
: fShortLength(0),
fFlags(kReadonlyAlias)
{
if(text == NULL) {
setToEmpty();
} else if(textLength < -1 ||
(textLength == -1 && !isTerminated) ||
(textLength >= 0 && isTerminated && text[textLength] != 0)
) {
setToBogus();
} else {
if(textLength == -1) {
textLength = u_strlen(text);
}
setArray((UChar *)text, textLength, isTerminated ? textLength + 1 : textLength);
}
}
UnicodeString::UnicodeString(UChar *buff,
int32_t buffLength,
int32_t buffCapacity)
: fShortLength(0),
fFlags(kWritableAlias)
{
if(buff == NULL) {
setToEmpty();
} else if(buffLength < -1 || buffCapacity < 0 || buffLength > buffCapacity) {
setToBogus();
} else {
if(buffLength == -1) {
const UChar *p = buff, *limit = buff + buffCapacity;
while(p != limit && *p != 0) {
++p;
}
buffLength = (int32_t)(p - buff);
}
setArray(buff, buffLength, buffCapacity);
}
}
UnicodeString::UnicodeString(const char *src, int32_t length, EInvariant)
: fShortLength(0),
fFlags(kShortString)
{
if(src==NULL) {
} else {
if(length<0) {
length=(int32_t)uprv_strlen(src);
}
if(cloneArrayIfNeeded(length, length, FALSE)) {
u_charsToUChars(src, getArrayStart(), length);
setLength(length);
} else {
setToBogus();
}
}
}
UnicodeString::UnicodeString(const UnicodeString& that)
: Replaceable(),
fShortLength(0),
fFlags(kShortString)
{
copyFrom(that);
}
UnicodeString::UnicodeString(const UnicodeString& that,
int32_t srcStart)
: Replaceable(),
fShortLength(0),
fFlags(kShortString)
{
setTo(that, srcStart);
}
UnicodeString::UnicodeString(const UnicodeString& that,
int32_t srcStart,
int32_t srcLength)
: Replaceable(),
fShortLength(0),
fFlags(kShortString)
{
setTo(that, srcStart, srcLength);
}
Replaceable *
Replaceable::clone() const {
return NULL;
}
Replaceable *
UnicodeString::clone() const {
return new UnicodeString(*this);
}
UBool
UnicodeString::allocate(int32_t capacity) {
if(capacity <= US_STACKBUF_SIZE) {
fFlags = kShortString;
} else {
int32_t words = (int32_t)(((sizeof(int32_t) + capacity * U_SIZEOF_UCHAR + 15) & ~15) >> 2);
int32_t *array = (int32_t*) uprv_malloc( sizeof(int32_t) * words );
if(array != 0) {
*array++ = 1;
fUnion.fFields.fArray = (UChar *)array;
fUnion.fFields.fCapacity = (int32_t)((words - 1) * (sizeof(int32_t) / U_SIZEOF_UCHAR));
fFlags = kLongString;
} else {
fShortLength = 0;
fUnion.fFields.fArray = 0;
fUnion.fFields.fCapacity = 0;
fFlags = kIsBogus;
return FALSE;
}
}
return TRUE;
}
UnicodeString::~UnicodeString()
{
releaseArray();
}
UnicodeString &
UnicodeString::operator=(const UnicodeString &src) {
return copyFrom(src);
}
UnicodeString &
UnicodeString::fastCopyFrom(const UnicodeString &src) {
return copyFrom(src, TRUE);
}
UnicodeString &
UnicodeString::copyFrom(const UnicodeString &src, UBool fastCopy) {
if(this == 0 || this == &src) {
return *this;
}
if(&src == 0 || src.isBogus()) {
setToBogus();
return *this;
}
releaseArray();
if(src.isEmpty()) {
setToEmpty();
return *this;
}
int32_t srcLength = src.length();
setLength(srcLength);
switch(src.fFlags) {
case kShortString:
fFlags = kShortString;
uprv_memcpy(fUnion.fStackBuffer, src.fUnion.fStackBuffer, fShortLength * U_SIZEOF_UCHAR);
break;
case kLongString:
((UnicodeString &)src).addRef();
fUnion.fFields.fArray = src.fUnion.fFields.fArray;
fUnion.fFields.fCapacity = src.fUnion.fFields.fCapacity;
fFlags = src.fFlags;
break;
case kReadonlyAlias:
if(fastCopy) {
fUnion.fFields.fArray = src.fUnion.fFields.fArray;
fUnion.fFields.fCapacity = src.fUnion.fFields.fCapacity;
fFlags = src.fFlags;
break;
}
case kWritableAlias:
if(allocate(srcLength)) {
uprv_memcpy(getArrayStart(), src.getArrayStart(), srcLength * U_SIZEOF_UCHAR);
break;
}
default:
fShortLength = 0;
fUnion.fFields.fArray = 0;
fUnion.fFields.fCapacity = 0;
fFlags = kIsBogus;
break;
}
return *this;
}
UnicodeString UnicodeString::unescape() const {
UnicodeString result(length(), (UChar32)0, (int32_t)0); const UChar *array = getBuffer();
int32_t len = length();
int32_t prev = 0;
for (int32_t i=0;;) {
if (i == len) {
result.append(array, prev, len - prev);
break;
}
if (array[i++] == 0x5C ) {
result.append(array, prev, (i - 1) - prev);
UChar32 c = unescapeAt(i); if (c < 0) {
result.remove(); break; }
result.append(c);
prev = i;
}
}
return result;
}
UChar32 UnicodeString::unescapeAt(int32_t &offset) const {
return u_unescapeAt(UnicodeString_charAt, &offset, length(), (void*)this);
}
int8_t
UnicodeString::doCompare( int32_t start,
int32_t length,
const UChar *srcChars,
int32_t srcStart,
int32_t srcLength) const
{
if(isBogus()) {
return -1;
}
pinIndices(start, length);
if(srcChars == NULL) {
srcStart = srcLength = 0;
}
const UChar *chars = getArrayStart();
chars += start;
srcChars += srcStart;
int32_t minLength;
int8_t lengthResult;
if(srcLength < 0) {
srcLength = u_strlen(srcChars + srcStart);
}
if(length != srcLength) {
if(length < srcLength) {
minLength = length;
lengthResult = -1;
} else {
minLength = srcLength;
lengthResult = 1;
}
} else {
minLength = length;
lengthResult = 0;
}
if(minLength > 0 && chars != srcChars) {
int32_t result;
# if U_IS_BIG_ENDIAN
result = uprv_memcmp(chars, srcChars, minLength * sizeof(UChar));
if(result != 0) {
return (int8_t)(result >> 15 | 1);
}
# else
do {
result = ((int32_t)*(chars++) - (int32_t)*(srcChars++));
if(result != 0) {
return (int8_t)(result >> 15 | 1);
}
} while(--minLength > 0);
# endif
}
return lengthResult;
}
int8_t
UnicodeString::doCompareCodePointOrder(int32_t start,
int32_t length,
const UChar *srcChars,
int32_t srcStart,
int32_t srcLength) const
{
if(isBogus()) {
return -1;
}
pinIndices(start, length);
if(srcChars == NULL) {
srcStart = srcLength = 0;
}
int32_t diff = uprv_strCompare(getArrayStart() + start, length, srcChars + srcStart, srcLength, FALSE, TRUE);
if(diff!=0) {
return (int8_t)(diff >> 15 | 1);
} else {
return 0;
}
}
int32_t
UnicodeString::getLength() const {
return length();
}
UChar
UnicodeString::getCharAt(int32_t offset) const {
return charAt(offset);
}
UChar32
UnicodeString::getChar32At(int32_t offset) const {
return char32At(offset);
}
int32_t
UnicodeString::countChar32(int32_t start, int32_t length) const {
pinIndices(start, length);
return u_countChar32(getArrayStart()+start, length);
}
UBool
UnicodeString::hasMoreChar32Than(int32_t start, int32_t length, int32_t number) const {
pinIndices(start, length);
return u_strHasMoreChar32Than(getArrayStart()+start, length, number);
}
int32_t
UnicodeString::moveIndex32(int32_t index, int32_t delta) const {
int32_t len = length();
if(index<0) {
index=0;
} else if(index>len) {
index=len;
}
const UChar *array = getArrayStart();
if(delta>0) {
UTF_FWD_N(array, index, len, delta);
} else {
UTF_BACK_N(array, 0, index, -delta);
}
return index;
}
void
UnicodeString::doExtract(int32_t start,
int32_t length,
UChar *dst,
int32_t dstStart) const
{
pinIndices(start, length);
const UChar *array = getArrayStart();
if(array + start != dst + dstStart) {
us_arrayCopy(array, start, dst, dstStart, length);
}
}
int32_t
UnicodeString::extract(UChar *dest, int32_t destCapacity,
UErrorCode &errorCode) const {
int32_t len = length();
if(U_SUCCESS(errorCode)) {
if(isBogus() || destCapacity<0 || (destCapacity>0 && dest==0)) {
errorCode=U_ILLEGAL_ARGUMENT_ERROR;
} else {
const UChar *array = getArrayStart();
if(len>0 && len<=destCapacity && array!=dest) {
uprv_memcpy(dest, array, len*U_SIZEOF_UCHAR);
}
return u_terminateUChars(dest, destCapacity, len, &errorCode);
}
}
return len;
}
int32_t
UnicodeString::extract(int32_t start,
int32_t length,
char *target,
int32_t targetCapacity,
enum EInvariant) const
{
if(targetCapacity < 0 || (targetCapacity > 0 && target == NULL)) {
return 0;
}
pinIndices(start, length);
if(length <= targetCapacity) {
u_UCharsToChars(getArrayStart() + start, target, length);
}
UErrorCode status = U_ZERO_ERROR;
return u_terminateChars(target, targetCapacity, length, &status);
}
void
UnicodeString::extractBetween(int32_t start,
int32_t limit,
UnicodeString& target) const {
pinIndex(start);
pinIndex(limit);
doExtract(start, limit - start, target);
}
int32_t
UnicodeString::indexOf(const UChar *srcChars,
int32_t srcStart,
int32_t srcLength,
int32_t start,
int32_t length) const
{
if(isBogus() || srcChars == 0 || srcStart < 0 || srcLength == 0) {
return -1;
}
if(srcLength < 0 && srcChars[srcStart] == 0) {
return -1;
}
pinIndices(start, length);
const UChar *array = getArrayStart();
const UChar *match = u_strFindFirst(array + start, length, srcChars + srcStart, srcLength);
if(match == NULL) {
return -1;
} else {
return (int32_t)(match - array);
}
}
int32_t
UnicodeString::doIndexOf(UChar c,
int32_t start,
int32_t length) const
{
pinIndices(start, length);
const UChar *array = getArrayStart();
const UChar *match = u_memchr(array + start, c, length);
if(match == NULL) {
return -1;
} else {
return (int32_t)(match - array);
}
}
int32_t
UnicodeString::doIndexOf(UChar32 c,
int32_t start,
int32_t length) const {
pinIndices(start, length);
const UChar *array = getArrayStart();
const UChar *match = u_memchr32(array + start, c, length);
if(match == NULL) {
return -1;
} else {
return (int32_t)(match - array);
}
}
int32_t
UnicodeString::lastIndexOf(const UChar *srcChars,
int32_t srcStart,
int32_t srcLength,
int32_t start,
int32_t length) const
{
if(isBogus() || srcChars == 0 || srcStart < 0 || srcLength == 0) {
return -1;
}
if(srcLength < 0 && srcChars[srcStart] == 0) {
return -1;
}
pinIndices(start, length);
const UChar *array = getArrayStart();
const UChar *match = u_strFindLast(array + start, length, srcChars + srcStart, srcLength);
if(match == NULL) {
return -1;
} else {
return (int32_t)(match - array);
}
}
int32_t
UnicodeString::doLastIndexOf(UChar c,
int32_t start,
int32_t length) const
{
if(isBogus()) {
return -1;
}
pinIndices(start, length);
const UChar *array = getArrayStart();
const UChar *match = u_memrchr(array + start, c, length);
if(match == NULL) {
return -1;
} else {
return (int32_t)(match - array);
}
}
int32_t
UnicodeString::doLastIndexOf(UChar32 c,
int32_t start,
int32_t length) const {
pinIndices(start, length);
const UChar *array = getArrayStart();
const UChar *match = u_memrchr32(array + start, c, length);
if(match == NULL) {
return -1;
} else {
return (int32_t)(match - array);
}
}
UnicodeString&
UnicodeString::findAndReplace(int32_t start,
int32_t length,
const UnicodeString& oldText,
int32_t oldStart,
int32_t oldLength,
const UnicodeString& newText,
int32_t newStart,
int32_t newLength)
{
if(isBogus() || oldText.isBogus() || newText.isBogus()) {
return *this;
}
pinIndices(start, length);
oldText.pinIndices(oldStart, oldLength);
newText.pinIndices(newStart, newLength);
if(oldLength == 0) {
return *this;
}
while(length > 0 && length >= oldLength) {
int32_t pos = indexOf(oldText, oldStart, oldLength, start, length);
if(pos < 0) {
break;
} else {
replace(pos, oldLength, newText, newStart, newLength);
length -= pos + oldLength - start;
start = pos + newLength;
}
}
return *this;
}
void
UnicodeString::setToBogus()
{
releaseArray();
fShortLength = 0;
fUnion.fFields.fArray = 0;
fUnion.fFields.fCapacity = 0;
fFlags = kIsBogus;
}
void
UnicodeString::unBogus() {
if(fFlags & kIsBogus) {
setToEmpty();
}
}
UnicodeString &
UnicodeString::setTo(UBool isTerminated,
const UChar *text,
int32_t textLength)
{
if(fFlags & kOpenGetBuffer) {
return *this;
}
if(text == NULL) {
releaseArray();
setToEmpty();
return *this;
}
if( textLength < -1 ||
(textLength == -1 && !isTerminated) ||
(textLength >= 0 && isTerminated && text[textLength] != 0)
) {
setToBogus();
return *this;
}
releaseArray();
if(textLength == -1) {
textLength = u_strlen(text);
}
setArray((UChar *)text, textLength, isTerminated ? textLength + 1 : textLength);
fFlags = kReadonlyAlias;
return *this;
}
UnicodeString &
UnicodeString::setTo(UChar *buffer,
int32_t buffLength,
int32_t buffCapacity) {
if(fFlags & kOpenGetBuffer) {
return *this;
}
if(buffer == NULL) {
releaseArray();
setToEmpty();
return *this;
}
if(buffLength < -1 || buffCapacity < 0 || buffLength > buffCapacity) {
setToBogus();
return *this;
} else if(buffLength == -1) {
const UChar *p = buffer, *limit = buffer + buffCapacity;
while(p != limit && *p != 0) {
++p;
}
buffLength = (int32_t)(p - buffer);
}
releaseArray();
setArray(buffer, buffLength, buffCapacity);
fFlags = kWritableAlias;
return *this;
}
UnicodeString&
UnicodeString::setCharAt(int32_t offset,
UChar c)
{
int32_t len = length();
if(cloneArrayIfNeeded() && len > 0) {
if(offset < 0) {
offset = 0;
} else if(offset >= len) {
offset = len - 1;
}
getArrayStart()[offset] = c;
}
return *this;
}
UnicodeString&
UnicodeString::doReplace( int32_t start,
int32_t length,
const UnicodeString& src,
int32_t srcStart,
int32_t srcLength)
{
if(!src.isBogus()) {
src.pinIndices(srcStart, srcLength);
return doReplace(start, length, src.getArrayStart(), srcStart, srcLength);
} else {
return doReplace(start, length, 0, 0, 0);
}
}
UnicodeString&
UnicodeString::doReplace(int32_t start,
int32_t length,
const UChar *srcChars,
int32_t srcStart,
int32_t srcLength)
{
if(!isWritable()) {
return *this;
}
if(srcChars == 0) {
srcStart = srcLength = 0;
} else if(srcLength < 0) {
srcLength = u_strlen(srcChars + srcStart);
}
int32_t oldLength = this->length();
int32_t newSize;
if(start >= oldLength) {
newSize = oldLength + srcLength;
if(newSize <= getCapacity() && isBufferWritable()) {
us_arrayCopy(srcChars, srcStart, getArrayStart(), oldLength, srcLength);
setLength(newSize);
return *this;
} else {
start = oldLength;
length = 0;
}
} else {
pinIndices(start, length);
newSize = oldLength - length + srcLength;
}
UChar oldStackBuffer[US_STACKBUF_SIZE];
UChar *oldArray;
if((fFlags&kUsingStackBuffer) && (newSize > US_STACKBUF_SIZE)) {
u_memcpy(oldStackBuffer, fUnion.fStackBuffer, oldLength);
oldArray = oldStackBuffer;
} else {
oldArray = getArrayStart();
}
int32_t *bufferToDelete = 0;
if(!cloneArrayIfNeeded(newSize, newSize + (newSize >> 2) + kGrowSize,
FALSE, &bufferToDelete)
) {
return *this;
}
UChar *newArray = getArrayStart();
if(newArray != oldArray) {
us_arrayCopy(oldArray, 0, newArray, 0, start);
us_arrayCopy(oldArray, start + length,
newArray, start + srcLength,
oldLength - (start + length));
} else if(length != srcLength) {
us_arrayCopy(oldArray, start + length,
newArray, start + srcLength,
oldLength - (start + length));
}
us_arrayCopy(srcChars, srcStart, newArray, start, srcLength);
setLength(newSize);
if (bufferToDelete) {
uprv_free(bufferToDelete);
}
return *this;
}
void
UnicodeString::handleReplaceBetween(int32_t start,
int32_t limit,
const UnicodeString& text) {
replaceBetween(start, limit, text);
}
void
UnicodeString::copy(int32_t start, int32_t limit, int32_t dest) {
if (limit <= start) {
return; }
UChar* text = (UChar*) uprv_malloc( sizeof(UChar) * (limit - start) );
if (text != NULL) {
extractBetween(start, limit, text, 0);
insert(dest, text, 0, limit - start);
uprv_free(text);
}
}
UBool Replaceable::hasMetaData() const {
return TRUE;
}
UBool UnicodeString::hasMetaData() const {
return FALSE;
}
UnicodeString&
UnicodeString::doReverse(int32_t start,
int32_t length)
{
if(this->length() <= 1 || !cloneArrayIfNeeded()) {
return *this;
}
pinIndices(start, length);
UChar *left = getArrayStart() + start;
UChar *right = left + length;
UChar swap;
UBool hasSupplementary = FALSE;
while(left < --right) {
hasSupplementary |= (UBool)UTF_IS_LEAD(swap = *left);
hasSupplementary |= (UBool)UTF_IS_LEAD(*left++ = *right);
*right = swap;
}
if(hasSupplementary) {
UChar swap2;
left = getArrayStart() + start;
right = left + length - 1; while(left < right) {
if(UTF_IS_TRAIL(swap = *left) && UTF_IS_LEAD(swap2 = *(left + 1))) {
*left++ = swap2;
*left++ = swap;
} else {
++left;
}
}
}
return *this;
}
UBool
UnicodeString::padLeading(int32_t targetLength,
UChar padChar)
{
int32_t oldLength = length();
if(oldLength >= targetLength || !cloneArrayIfNeeded(targetLength)) {
return FALSE;
} else {
UChar *array = getArrayStart();
int32_t start = targetLength - oldLength;
us_arrayCopy(array, 0, array, start, oldLength);
while(--start >= 0) {
array[start] = padChar;
}
setLength(targetLength);
return TRUE;
}
}
UBool
UnicodeString::padTrailing(int32_t targetLength,
UChar padChar)
{
int32_t oldLength = length();
if(oldLength >= targetLength || !cloneArrayIfNeeded(targetLength)) {
return FALSE;
} else {
UChar *array = getArrayStart();
int32_t length = targetLength;
while(--length >= oldLength) {
array[length] = padChar;
}
setLength(targetLength);
return TRUE;
}
}
int32_t
UnicodeString::doHashCode() const
{
int32_t hashCode = uhash_hashUCharsN(getArrayStart(), length());
if (hashCode == kInvalidHashCode) {
hashCode = kEmptyHashCode;
}
return hashCode;
}
UChar *
UnicodeString::getBuffer(int32_t minCapacity) {
if(minCapacity>=-1 && cloneArrayIfNeeded(minCapacity)) {
fFlags|=kOpenGetBuffer;
fShortLength=0;
return getArrayStart();
} else {
return 0;
}
}
void
UnicodeString::releaseBuffer(int32_t newLength) {
if(fFlags&kOpenGetBuffer && newLength>=-1) {
int32_t capacity=getCapacity();
if(newLength==-1) {
const UChar *array=getArrayStart(), *p=array, *limit=array+capacity;
while(p<limit && *p!=0) {
++p;
}
newLength=(int32_t)(p-array);
} else if(newLength>capacity) {
newLength=capacity;
}
setLength(newLength);
fFlags&=~kOpenGetBuffer;
}
}
UBool
UnicodeString::cloneArrayIfNeeded(int32_t newCapacity,
int32_t growCapacity,
UBool doCopyArray,
int32_t **pBufferToDelete,
UBool forceClone) {
if(newCapacity == -1) {
newCapacity = getCapacity();
}
if(!isWritable()) {
return FALSE;
}
if(forceClone ||
fFlags & kBufferIsReadonly ||
fFlags & kRefCounted && refCount() > 1 ||
newCapacity > getCapacity()
) {
if(growCapacity == -1) {
growCapacity = newCapacity;
} else if(newCapacity <= US_STACKBUF_SIZE && growCapacity > US_STACKBUF_SIZE) {
growCapacity = US_STACKBUF_SIZE;
}
UChar oldStackBuffer[US_STACKBUF_SIZE];
UChar *oldArray;
uint8_t flags = fFlags;
if(flags&kUsingStackBuffer) {
if(doCopyArray && growCapacity > US_STACKBUF_SIZE) {
us_arrayCopy(fUnion.fStackBuffer, 0, oldStackBuffer, 0, fShortLength);
oldArray = oldStackBuffer;
} else {
oldArray = 0; }
} else {
oldArray = fUnion.fFields.fArray;
}
if(allocate(growCapacity) ||
newCapacity < growCapacity && allocate(newCapacity)
) {
if(doCopyArray && oldArray != 0) {
int32_t minLength = length();
newCapacity = getCapacity();
if(newCapacity < minLength) {
minLength = newCapacity;
setLength(minLength);
}
us_arrayCopy(oldArray, 0, getArrayStart(), 0, minLength);
} else {
fShortLength = 0;
}
if(flags & kRefCounted) {
int32_t *pRefCount = ((int32_t *)oldArray - 1);
if(umtx_atomic_dec(pRefCount) == 0) {
if(pBufferToDelete == 0) {
uprv_free(pRefCount);
} else {
*pBufferToDelete = pRefCount;
}
}
}
} else {
if(!(flags&kUsingStackBuffer)) {
fUnion.fFields.fArray = oldArray;
}
fFlags = flags;
setToBogus();
return FALSE;
}
}
return TRUE;
}
U_NAMESPACE_END
#ifdef U_STATIC_IMPLEMENTATION
static void uprv_UnicodeStringDummy(void) {
U_NAMESPACE_USE
delete [] (new UnicodeString[2]);
}
#endif