566 lines
16 KiB
C++
566 lines
16 KiB
C++
/*
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******************************************************************************
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* Copyright (C) 1999-2013, International Business Machines Corporation and
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* others. All Rights Reserved.
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******************************************************************************
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* Date Name Description
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* 10/22/99 alan Creation.
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**********************************************************************
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*/
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#include "uvector.h"
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#include "cmemory.h"
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#include "uarrsort.h"
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#include "uelement.h"
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U_NAMESPACE_BEGIN
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#define DEFAULT_CAPACITY 8
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/*
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* Constants for hinting whether a key is an integer
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* or a pointer. If a hint bit is zero, then the associated
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* token is assumed to be an integer. This is needed for iSeries
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*/
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#define HINT_KEY_POINTER (1)
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#define HINT_KEY_INTEGER (0)
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UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UVector)
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UVector::UVector(UErrorCode &status) :
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count(0),
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capacity(0),
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elements(0),
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deleter(0),
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comparer(0)
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{
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_init(DEFAULT_CAPACITY, status);
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}
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UVector::UVector(int32_t initialCapacity, UErrorCode &status) :
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count(0),
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capacity(0),
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elements(0),
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deleter(0),
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comparer(0)
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{
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_init(initialCapacity, status);
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}
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UVector::UVector(UObjectDeleter *d, UElementsAreEqual *c, UErrorCode &status) :
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count(0),
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capacity(0),
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elements(0),
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deleter(d),
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comparer(c)
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{
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_init(DEFAULT_CAPACITY, status);
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}
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UVector::UVector(UObjectDeleter *d, UElementsAreEqual *c, int32_t initialCapacity, UErrorCode &status) :
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count(0),
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capacity(0),
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elements(0),
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deleter(d),
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comparer(c)
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{
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_init(initialCapacity, status);
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}
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void UVector::_init(int32_t initialCapacity, UErrorCode &status) {
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if (U_FAILURE(status)) {
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return;
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}
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// Fix bogus initialCapacity values; avoid malloc(0) and integer overflow
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if ((initialCapacity < 1) || (initialCapacity > (int32_t)(INT32_MAX / sizeof(UElement)))) {
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initialCapacity = DEFAULT_CAPACITY;
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}
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elements = (UElement *)uprv_malloc(sizeof(UElement)*initialCapacity);
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if (elements == 0) {
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status = U_MEMORY_ALLOCATION_ERROR;
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} else {
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capacity = initialCapacity;
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}
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}
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UVector::~UVector() {
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removeAllElements();
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uprv_free(elements);
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elements = 0;
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}
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/**
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* Assign this object to another (make this a copy of 'other').
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* Use the 'assign' function to assign each element.
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*/
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void UVector::assign(const UVector& other, UElementAssigner *assign, UErrorCode &ec) {
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if (ensureCapacity(other.count, ec)) {
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setSize(other.count, ec);
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if (U_SUCCESS(ec)) {
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for (int32_t i=0; i<other.count; ++i) {
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if (elements[i].pointer != 0 && deleter != 0) {
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(*deleter)(elements[i].pointer);
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}
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(*assign)(&elements[i], &other.elements[i]);
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}
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}
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}
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}
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// This only does something sensible if this object has a non-null comparer
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UBool UVector::operator==(const UVector& other) {
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int32_t i;
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if (count != other.count) return FALSE;
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if (comparer != NULL) {
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// Compare using this object's comparer
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for (i=0; i<count; ++i) {
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if (!(*comparer)(elements[i], other.elements[i])) {
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return FALSE;
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}
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}
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}
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return TRUE;
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}
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void UVector::addElement(void* obj, UErrorCode &status) {
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if (ensureCapacity(count + 1, status)) {
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elements[count++].pointer = obj;
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}
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}
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void UVector::addElement(int32_t elem, UErrorCode &status) {
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if (ensureCapacity(count + 1, status)) {
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elements[count].pointer = NULL; // Pointers may be bigger than ints.
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elements[count].integer = elem;
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count++;
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}
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}
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void UVector::setElementAt(void* obj, int32_t index) {
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if (0 <= index && index < count) {
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if (elements[index].pointer != 0 && deleter != 0) {
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(*deleter)(elements[index].pointer);
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}
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elements[index].pointer = obj;
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}
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/* else index out of range */
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}
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void UVector::setElementAt(int32_t elem, int32_t index) {
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if (0 <= index && index < count) {
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if (elements[index].pointer != 0 && deleter != 0) {
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// TODO: this should be an error. mixing up ints and pointers.
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(*deleter)(elements[index].pointer);
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}
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elements[index].pointer = NULL;
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elements[index].integer = elem;
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}
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/* else index out of range */
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}
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void UVector::insertElementAt(void* obj, int32_t index, UErrorCode &status) {
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// must have 0 <= index <= count
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if (0 <= index && index <= count && ensureCapacity(count + 1, status)) {
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for (int32_t i=count; i>index; --i) {
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elements[i] = elements[i-1];
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}
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elements[index].pointer = obj;
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++count;
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}
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/* else index out of range */
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}
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void UVector::insertElementAt(int32_t elem, int32_t index, UErrorCode &status) {
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// must have 0 <= index <= count
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if (0 <= index && index <= count && ensureCapacity(count + 1, status)) {
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for (int32_t i=count; i>index; --i) {
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elements[i] = elements[i-1];
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}
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elements[index].pointer = NULL;
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elements[index].integer = elem;
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++count;
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}
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/* else index out of range */
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}
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void* UVector::elementAt(int32_t index) const {
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return (0 <= index && index < count) ? elements[index].pointer : 0;
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}
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int32_t UVector::elementAti(int32_t index) const {
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return (0 <= index && index < count) ? elements[index].integer : 0;
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}
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UBool UVector::containsAll(const UVector& other) const {
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for (int32_t i=0; i<other.size(); ++i) {
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if (indexOf(other.elements[i]) < 0) {
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return FALSE;
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}
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}
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return TRUE;
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}
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UBool UVector::containsNone(const UVector& other) const {
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for (int32_t i=0; i<other.size(); ++i) {
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if (indexOf(other.elements[i]) >= 0) {
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return FALSE;
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}
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}
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return TRUE;
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}
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UBool UVector::removeAll(const UVector& other) {
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UBool changed = FALSE;
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for (int32_t i=0; i<other.size(); ++i) {
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int32_t j = indexOf(other.elements[i]);
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if (j >= 0) {
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removeElementAt(j);
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changed = TRUE;
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}
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}
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return changed;
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}
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UBool UVector::retainAll(const UVector& other) {
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UBool changed = FALSE;
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for (int32_t j=size()-1; j>=0; --j) {
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int32_t i = other.indexOf(elements[j]);
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if (i < 0) {
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removeElementAt(j);
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changed = TRUE;
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}
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}
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return changed;
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}
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void UVector::removeElementAt(int32_t index) {
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void* e = orphanElementAt(index);
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if (e != 0 && deleter != 0) {
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(*deleter)(e);
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}
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}
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UBool UVector::removeElement(void* obj) {
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int32_t i = indexOf(obj);
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if (i >= 0) {
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removeElementAt(i);
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return TRUE;
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}
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return FALSE;
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}
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void UVector::removeAllElements(void) {
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if (deleter != 0) {
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for (int32_t i=0; i<count; ++i) {
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if (elements[i].pointer != 0) {
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(*deleter)(elements[i].pointer);
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}
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}
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}
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count = 0;
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}
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UBool UVector::equals(const UVector &other) const {
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int i;
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if (this->count != other.count) {
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return FALSE;
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}
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if (comparer == 0) {
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for (i=0; i<count; i++) {
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if (elements[i].pointer != other.elements[i].pointer) {
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return FALSE;
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}
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}
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} else {
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UElement key;
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for (i=0; i<count; i++) {
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key.pointer = &other.elements[i];
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if (!(*comparer)(key, elements[i])) {
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return FALSE;
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}
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}
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}
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return TRUE;
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}
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int32_t UVector::indexOf(void* obj, int32_t startIndex) const {
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UElement key;
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key.pointer = obj;
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return indexOf(key, startIndex, HINT_KEY_POINTER);
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}
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int32_t UVector::indexOf(int32_t obj, int32_t startIndex) const {
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UElement key;
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key.integer = obj;
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return indexOf(key, startIndex, HINT_KEY_INTEGER);
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}
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// This only works if this object has a non-null comparer
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int32_t UVector::indexOf(UElement key, int32_t startIndex, int8_t hint) const {
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int32_t i;
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if (comparer != 0) {
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for (i=startIndex; i<count; ++i) {
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if ((*comparer)(key, elements[i])) {
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return i;
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}
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}
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} else {
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for (i=startIndex; i<count; ++i) {
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/* Pointers are not always the same size as ints so to perform
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* a valid comparision we need to know whether we are being
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* provided an int or a pointer. */
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if (hint & HINT_KEY_POINTER) {
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if (key.pointer == elements[i].pointer) {
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return i;
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}
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} else {
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if (key.integer == elements[i].integer) {
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return i;
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}
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}
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}
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}
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return -1;
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}
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UBool UVector::ensureCapacity(int32_t minimumCapacity, UErrorCode &status) {
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if (minimumCapacity < 0) {
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return FALSE;
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}
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if (capacity < minimumCapacity) {
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if (capacity > (INT32_MAX - 1) / 2) { // integer overflow check
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return FALSE;
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}
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int32_t newCap = capacity * 2;
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if (newCap < minimumCapacity) {
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newCap = minimumCapacity;
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}
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if (newCap > (int32_t)(INT32_MAX / sizeof(UElement))) { // integer overflow check
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// We keep the original memory contents on bad minimumCapacity.
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status = U_ILLEGAL_ARGUMENT_ERROR;
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return FALSE;
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}
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UElement* newElems = (UElement *)uprv_realloc(elements, sizeof(UElement)*newCap);
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if (newElems == NULL) {
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// We keep the original contents on the memory failure on realloc or bad minimumCapacity.
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status = U_MEMORY_ALLOCATION_ERROR;
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return FALSE;
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}
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elements = newElems;
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capacity = newCap;
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}
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return TRUE;
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}
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/**
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* Change the size of this vector as follows: If newSize is smaller,
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* then truncate the array, possibly deleting held elements for i >=
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* newSize. If newSize is larger, grow the array, filling in new
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* slots with NULL.
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*/
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void UVector::setSize(int32_t newSize, UErrorCode &status) {
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int32_t i;
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if (newSize < 0) {
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return;
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}
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if (newSize > count) {
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if (!ensureCapacity(newSize, status)) {
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return;
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}
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UElement empty;
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empty.pointer = NULL;
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empty.integer = 0;
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for (i=count; i<newSize; ++i) {
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elements[i] = empty;
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}
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} else {
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/* Most efficient to count down */
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for (i=count-1; i>=newSize; --i) {
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removeElementAt(i);
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}
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}
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count = newSize;
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}
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/**
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* Fill in the given array with all elements of this vector.
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*/
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void** UVector::toArray(void** result) const {
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void** a = result;
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for (int i=0; i<count; ++i) {
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*a++ = elements[i].pointer;
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}
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return result;
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}
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UObjectDeleter *UVector::setDeleter(UObjectDeleter *d) {
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UObjectDeleter *old = deleter;
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deleter = d;
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return old;
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}
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UElementsAreEqual *UVector::setComparer(UElementsAreEqual *d) {
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UElementsAreEqual *old = comparer;
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comparer = d;
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return old;
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}
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/**
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* Removes the element at the given index from this vector and
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* transfer ownership of it to the caller. After this call, the
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* caller owns the result and must delete it and the vector entry
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* at 'index' is removed, shifting all subsequent entries back by
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* one index and shortening the size of the vector by one. If the
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* index is out of range or if there is no item at the given index
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* then 0 is returned and the vector is unchanged.
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*/
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void* UVector::orphanElementAt(int32_t index) {
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void* e = 0;
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if (0 <= index && index < count) {
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e = elements[index].pointer;
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for (int32_t i=index; i<count-1; ++i) {
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elements[i] = elements[i+1];
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}
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--count;
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}
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/* else index out of range */
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return e;
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}
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/**
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* Insert the given object into this vector at its sorted position
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* as defined by 'compare'. The current elements are assumed to
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* be sorted already.
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*/
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void UVector::sortedInsert(void* obj, UElementComparator *compare, UErrorCode& ec) {
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UElement e;
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e.pointer = obj;
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sortedInsert(e, compare, ec);
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}
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/**
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* Insert the given integer into this vector at its sorted position
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* as defined by 'compare'. The current elements are assumed to
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* be sorted already.
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*/
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void UVector::sortedInsert(int32_t obj, UElementComparator *compare, UErrorCode& ec) {
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UElement e;
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e.integer = obj;
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sortedInsert(e, compare, ec);
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}
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// ASSUME elements[] IS CURRENTLY SORTED
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void UVector::sortedInsert(UElement e, UElementComparator *compare, UErrorCode& ec) {
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// Perform a binary search for the location to insert tok at. Tok
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// will be inserted between two elements a and b such that a <=
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// tok && tok < b, where there is a 'virtual' elements[-1] always
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// less than tok and a 'virtual' elements[count] always greater
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// than tok.
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int32_t min = 0, max = count;
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while (min != max) {
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int32_t probe = (min + max) / 2;
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int8_t c = (*compare)(elements[probe], e);
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if (c > 0) {
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max = probe;
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} else {
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// assert(c <= 0);
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min = probe + 1;
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}
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}
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if (ensureCapacity(count + 1, ec)) {
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for (int32_t i=count; i>min; --i) {
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elements[i] = elements[i-1];
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}
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elements[min] = e;
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++count;
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}
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}
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/**
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* Array sort comparator function.
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* Used from UVector::sort()
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* Conforms to function signature required for uprv_sortArray().
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* This function is essentially just a wrapper, to make a
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* UVector style comparator function usable with uprv_sortArray().
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*
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* The context pointer to this function is a pointer back
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* (with some extra indirection) to the user supplied comparator.
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*
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*/
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static int32_t U_CALLCONV
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sortComparator(const void *context, const void *left, const void *right) {
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UElementComparator *compare = *static_cast<UElementComparator * const *>(context);
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UElement e1 = *static_cast<const UElement *>(left);
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UElement e2 = *static_cast<const UElement *>(right);
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int32_t result = (*compare)(e1, e2);
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return result;
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}
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/**
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* Array sort comparison function for use from UVector::sorti()
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* Compares int32_t vector elements.
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*/
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static int32_t U_CALLCONV
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sortiComparator(const void * /*context */, const void *left, const void *right) {
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const UElement *e1 = static_cast<const UElement *>(left);
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const UElement *e2 = static_cast<const UElement *>(right);
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int32_t result = e1->integer < e2->integer? -1 :
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e1->integer == e2->integer? 0 : 1;
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return result;
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}
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/**
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* Sort the vector, assuming it constains ints.
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* (A more general sort would take a comparison function, but it's
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* not clear whether UVector's UElementComparator or
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* UComparator from uprv_sortAray would be more appropriate.)
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*/
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void UVector::sorti(UErrorCode &ec) {
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if (U_SUCCESS(ec)) {
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uprv_sortArray(elements, count, sizeof(UElement),
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sortiComparator, NULL, FALSE, &ec);
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}
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}
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/**
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* Sort with a user supplied comparator.
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*
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* The comparator function handling is confusing because the function type
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* for UVector (as defined for sortedInsert()) is different from the signature
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* required by uprv_sortArray(). This is handled by passing the
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* the UVector sort function pointer via the context pointer to a
|
|
* sortArray() comparator function, which can then call back to
|
|
* the original user functtion.
|
|
*
|
|
* 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, const void *context, UErrorCode &ec) {
|
|
if (U_SUCCESS(ec)) {
|
|
uprv_sortArray(elements, count, sizeof(UElement),
|
|
compare, context, TRUE, &ec);
|
|
}
|
|
}
|
|
|
|
U_NAMESPACE_END
|
|
|