/* * Constants for hinting whether a key is an integer * or a pointer. If a hint bit is zero, then the associated * token is assumed to be an integer. This is needed for iSeries
*/
constexpr int8_t HINT_KEY_POINTER = 1;
constexpr int8_t HINT_KEY_INTEGER = 0;
UVector::~UVector() {
removeAllElements();
uprv_free(elements);
elements = nullptr;
}
/** * Assign this object to another (make this a copy of 'other'). * Use the 'assign' function to assign each element.
*/ void UVector::assign(const UVector& other, UElementAssigner *assign, UErrorCode &ec) { if (ensureCapacity(other.count, ec)) {
setSize(other.count, ec); if (U_SUCCESS(ec)) { for (int32_t i=0; i<other.count; ++i) { if (elements[i].pointer != nullptr && deleter != nullptr) {
(*deleter)(elements[i].pointer);
}
(*assign)(&elements[i], &other.elements[i]);
}
}
}
}
// This only does something sensible if this object has a non-null comparer bool UVector::operator==(const UVector& other) const {
U_ASSERT(comparer != nullptr); if (count != other.count) returnfalse; if (comparer != nullptr) { // Compare using this object's comparer for (int32_t i=0; i<count; ++i) { if (!(*comparer)(elements[i], other.elements[i])) { returnfalse;
}
}
} returntrue;
}
void UVector::adoptElement(void* obj, UErrorCode &status) {
U_ASSERT(deleter != nullptr); if (ensureCapacity(count + 1, status)) {
elements[count++].pointer = obj;
} else {
(*deleter)(obj);
}
} void UVector::addElement(int32_t elem, UErrorCode &status) {
U_ASSERT(deleter == nullptr); // Usage error. Mixing up ints and pointers. if (ensureCapacity(count + 1, status)) {
elements[count].pointer = nullptr; // Pointers may be bigger than ints.
elements[count].integer = elem;
count++;
}
}
void UVector::setElementAt(void* obj, int32_t index) { if (0 <= index && index < count) { if (elements[index].pointer != nullptr && deleter != nullptr) {
(*deleter)(elements[index].pointer);
}
elements[index].pointer = obj;
} else { /* index out of range */ if (deleter != nullptr) {
(*deleter)(obj);
}
}
}
void UVector::setElementAt(int32_t elem, int32_t index) {
U_ASSERT(deleter == nullptr); // Usage error. Mixing up ints and pointers. if (0 <= index && index < count) {
elements[index].pointer = nullptr;
elements[index].integer = elem;
} /* else index out of range */
}
void UVector::insertElementAt(void* obj, int32_t index, UErrorCode &status) { if (ensureCapacity(count + 1, status)) { if (0 <= index && index <= count) { for (int32_t i=count; i>index; --i) {
elements[i] = elements[i-1];
}
elements[index].pointer = obj;
++count;
} else { /* index out of range */
status = U_ILLEGAL_ARGUMENT_ERROR;
}
} if (U_FAILURE(status) && deleter != nullptr) {
(*deleter)(obj);
}
}
void UVector::insertElementAt(int32_t elem, int32_t index, UErrorCode &status) {
U_ASSERT(deleter == nullptr); // Usage error. Mixing up ints and pointers. // must have 0 <= index <= count if (ensureCapacity(count + 1, status)) { if (0 <= index && index <= count) { for (int32_t i=count; i>index; --i) {
elements[i] = elements[i-1];
}
elements[index].pointer = nullptr;
elements[index].integer = elem;
++count;
} else { /* index out of range */
status = U_ILLEGAL_ARGUMENT_ERROR;
}
}
}
void* UVector::elementAt(int32_t index) const { return (0 <= index && index < count) ? elements[index].pointer : nullptr;
}
int32_t UVector::elementAti(int32_t index) const { return (0 <= index && index < count) ? elements[index].integer : 0;
}
int32_t UVector::indexOf(UElement key, int32_t startIndex, int8_t hint) const { if (comparer != nullptr) { for (int32_t i=startIndex; i<count; ++i) { if ((*comparer)(key, elements[i])) { return i;
}
}
} else { for (int32_t i=startIndex; i<count; ++i) { /* Pointers are not always the same size as ints so to perform * a valid comparison we need to know whether we are being
* provided an int or a pointer. */ if (hint & HINT_KEY_POINTER) { if (key.pointer == elements[i].pointer) { return i;
}
} else { if (key.integer == elements[i].integer) { return i;
}
}
}
} return -1;
}
UBool UVector::ensureCapacity(int32_t minimumCapacity, UErrorCode &status) { if (U_FAILURE(status)) { returnfalse;
} if (minimumCapacity < 0) {
status = U_ILLEGAL_ARGUMENT_ERROR; returnfalse;
} if (capacity < minimumCapacity) { if (capacity > (INT32_MAX - 1) / 2) { // integer overflow check
status = U_ILLEGAL_ARGUMENT_ERROR; returnfalse;
}
int32_t newCap = capacity * 2; if (newCap < minimumCapacity) {
newCap = minimumCapacity;
} if (newCap > static_cast<int32_t>(INT32_MAX / sizeof(UElement))) { // integer overflow check // We keep the original memory contents on bad minimumCapacity.
status = U_ILLEGAL_ARGUMENT_ERROR; returnfalse;
}
UElement* newElems = static_cast<UElement*>(uprv_realloc(elements, sizeof(UElement) * newCap)); if (newElems == nullptr) { // We keep the original contents on the memory failure on realloc or bad minimumCapacity.
status = U_MEMORY_ALLOCATION_ERROR; returnfalse;
}
elements = newElems;
capacity = newCap;
} returntrue;
}
/** * Change the size of this vector as follows: If newSize is smaller, * then truncate the array, possibly deleting held elements for i >= * newSize. If newSize is larger, grow the array, filling in new * slots with nullptr.
*/ void UVector::setSize(int32_t newSize, UErrorCode &status) { if (!ensureCapacity(newSize, status)) { return;
} if (newSize > count) {
UElement empty;
empty.pointer = nullptr;
empty.integer = 0; for (int32_t i=count; i<newSize; ++i) {
elements[i] = empty;
}
} else { /* Most efficient to count down */ for (int32_t i=count-1; i>=newSize; --i) {
removeElementAt(i);
}
}
count = newSize;
}
/** * Fill in the given array with all elements of this vector.
*/ void** UVector::toArray(void** result) const { void** a = result; for (int i=0; i<count; ++i) {
*a++ = elements[i].pointer;
} return result;
}
/** * Removes the element at the given index from this vector and * transfer ownership of it to the caller. After this call, the * caller owns the result and must delete it and the vector entry * at 'index' is removed, shifting all subsequent entries back by * one index and shortening the size of the vector by one. If the * index is out of range or if there is no item at the given index * then 0 is returned and the vector is unchanged.
*/ void* UVector::orphanElementAt(int32_t index) { void* e = nullptr; if (0 <= index && index < count) {
e = elements[index].pointer; for (int32_t i=index; i<count-1; ++i) {
elements[i] = elements[i+1];
}
--count;
} /* else index out of range */ return e;
}
/** * Insert the given object into this vector at its sorted position * as defined by 'compare'. The current elements are assumed to * be sorted already.
*/ void UVector::sortedInsert(void* obj, UElementComparator *compare, UErrorCode& ec) {
UElement e;
e.pointer = obj;
sortedInsert(e, compare, ec);
}
/** * Insert the given integer into this vector at its sorted position * as defined by 'compare'. The current elements are assumed to * be sorted already.
*/ void UVector::sortedInsert(int32_t obj, UElementComparator *compare, UErrorCode& ec) {
U_ASSERT(deleter == nullptr);
UElement e {};
e.integer = obj;
sortedInsert(e, compare, ec);
}
// ASSUME elements[] IS CURRENTLY SORTED void UVector::sortedInsert(UElement e, UElementComparator *compare, UErrorCode& ec) { // Perform a binary search for the location to insert tok at. Tok // will be inserted between two elements a and b such that a <= // tok && tok < b, where there is a 'virtual' elements[-1] always // less than tok and a 'virtual' elements[count] always greater // than tok. if (!ensureCapacity(count + 1, ec)) { if (deleter != nullptr) {
(*deleter)(e.pointer);
} return;
}
int32_t min = 0, max = count; while (min != max) {
int32_t probe = (min + max) / 2;
int32_t c = (*compare)(elements[probe], e); if (c > 0) {
max = probe;
} else { // assert(c <= 0);
min = probe + 1;
}
} for (int32_t i=count; i>min; --i) {
elements[i] = elements[i-1];
}
elements[min] = e;
++count;
}
/** * Array sort comparator function. * Used from UVector::sort() * Conforms to function signature required for uprv_sortArray(). * This function is essentially just a wrapper, to make a * UVector style comparator function usable with uprv_sortArray(). * * The context pointer to this function is a pointer back * (with some extra indirection) to the user supplied comparator. *
*/ static int32_t U_CALLCONV
sortComparator(constvoid *context, constvoid *left, constvoid *right) {
UElementComparator *compare = *static_cast<UElementComparator * const *>(context);
UElement e1 = *static_cast<const UElement *>(left);
UElement e2 = *static_cast<const UElement *>(right);
int32_t result = (*compare)(e1, e2); return result;
}
/** * Sort the vector, assuming it contains ints. * (A more general sort would take a comparison function, but it's * not clear whether UVector's UElementComparator or * UComparator from uprv_sortAray would be more appropriate.)
*/ void UVector::sorti(UErrorCode &ec) { if (U_SUCCESS(ec)) {
uprv_sortArray(elements, count, sizeof(UElement),
sortiComparator, nullptr, false, &ec);
}
}
/** * Sort with a user supplied comparator. * * The comparator function handling is confusing because the function type * for UVector (as defined for sortedInsert()) is different from the signature * required by uprv_sortArray(). This is handled by passing the * the UVector sort function pointer via the context pointer to a * sortArray() comparator function, which can then call back to * the original user function. * * An additional twist is that it's not safe to pass a pointer-to-function * as a (void *) data pointer, so instead we pass a (data) pointer to a * pointer-to-function variable.
*/ void UVector::sort(UElementComparator *compare, UErrorCode &ec) { if (U_SUCCESS(ec)) {
uprv_sortArray(elements, count, sizeof(UElement),
sortComparator, &compare, false, &ec);
}
}
/** * Stable sort with a user supplied comparator of type UComparator.
*/ void UVector::sortWithUComparator(UComparator *compare, constvoid *context, UErrorCode &ec) { if (U_SUCCESS(ec)) {
uprv_sortArray(elements, count, sizeof(UElement),
compare, context, true, &ec);
}
}
U_NAMESPACE_END
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