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#include "WordCollection.h"
#include "cstring"
#include <iostream>
/* Private */
void WordCollection::free() {
delete[] words;
delete[] sortMap;
}
void WordCollection::copyFrom(const WordCollection& other) {
sortMapCount = other.sortMapCount;
wordsCount = other.wordsCount;
length = other.length;
words = new DynStr[length];
sortMap = new int[length];
for (int i = 0; i < length; i++) { // Must be < length, since we can have valid items outside the count range in words
words[i] = other.words[i];
sortMap[i] = other.sortMap[i];
}
}
void WordCollection::resize() {
int oldLength = length;
if (length == 0) length = 8;
else length <<= 1;
DynStr* newWords = new DynStr[length];
int* newSortMap = new int[length];
for (int i = 0; i < oldLength; i++) {
newWords[i] = words[i];
newSortMap[i] = sortMap[i];
}
delete[] words;
delete[] sortMap;
words = newWords;
sortMap = newSortMap;
}
void WordCollection::insertSortMapIndex(int position, int value) {
if (position == -1)
position = sortMapCount;
for (int i = sortMapCount; i > position; i--)
sortMap[i] = sortMap[i - 1];
sortMap[position] = value;
}
void WordCollection::removeSortMapIndex(int position) {
for (int i = position; i <= sortMapCount - 2; i++)
sortMap[i] = sortMap[i + 1];
sortMap[sortMapCount - 1] = 0;
}
int WordCollection::findSortMapIndexWhen(int condition, const char* str) {
if (condition < -1) condition = -1;
else if (condition > 1) condition = 1;
// TODO: replace with binary search
for (int i = 0; i < sortMapCount; i++) {
int cmp = strcmp(words[sortMap[i]].get_str(), str);
if (cmp > 1) cmp = 1;
else if (cmp < -1) cmp = -1;
if (cmp == condition)
return i;
}
return -1;
}
/* Public */
WordCollection::WordCollection() {
words = nullptr;
sortMap = nullptr;
sortMapCount = wordsCount = length = 0;
}
WordCollection::WordCollection(const WordCollection& other) {
copyFrom(other);
}
WordCollection& WordCollection::operator=(const WordCollection& other) {
if (this != &other) {
free();
copyFrom(other);
}
return *this;
}
WordCollection::~WordCollection() {
free();
}
WordCollection& WordCollection::operator+=(const WordCollection& other) {
for (int i = 0; i < other.sortMapCount; i++) {
(*this) *= other.words[other.sortMap[i]].get_str();
}
return *this;
}
WordCollection& WordCollection::operator-=(const WordCollection& other) {
if (this != &other) {
for (int i = 0; i < other.sortMapCount; i++) {
(*this) /= other.words[other.sortMap[i]].get_str();
}
}
else {
*this = WordCollection();
}
return *this;
}
WordCollection& WordCollection::operator*=(const char* str) {
if (!(*this)[str]) {
if (sortMapCount == length || wordsCount == length) resize();
words[wordsCount] = DynStr(str);
insertSortMapIndex(findSortMapIndexWhen(1, str), wordsCount);
sortMapCount++;
wordsCount++;
}
return *this;
}
WordCollection& WordCollection::operator/=(const char* str) {
int ind = findSortMapIndexWhen(0, str);
if (ind > -1) {
words[sortMap[ind]] = DynStr();
removeSortMapIndex(ind);
sortMapCount--;
}
return *this;
}
std::ostream& operator<<(std::ostream& ostrm, const WordCollection& collection) {
ostrm << "{";
if (collection.sortMapCount > 0) {
for (int i = 0; i <= collection.sortMapCount - 2; i++)
ostrm << collection.words[collection.sortMap[i]].get_str() << ", ";
ostrm << collection.words[collection.sortMap[collection.sortMapCount - 1]].get_str();
}
ostrm << "}";
return ostrm;
}
std::istream& operator>>(std::istream& istrm, WordCollection& collection) {
char buffer[1024];
istrm.getline(buffer, 1024);
collection *= buffer;
return istrm;
}
bool WordCollection::operator[](const char* str) {
return findSortMapIndexWhen(0, str) > -1;
}
const WordCollection operator+(const WordCollection& lhs, const WordCollection& rhs) {
WordCollection res(lhs);
res += rhs;
return res;
}
const WordCollection operator-(const WordCollection& lhs, const WordCollection& rhs) {
WordCollection res(lhs);
res -= rhs;
return res;
}
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