// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ********************************************************************** * Copyright (C) 1999-2014, International Business Machines * Corporation and others. All Rights Reserved. ********************************************************************** */ // // UVector64 is a class implementing a vector of 64 bit integers. // It is similar to UVector32, but holds int64_t values rather than int32_t. // Most of the code is unchanged from UVector. // #ifndef UVECTOR64_H #define UVECTOR64_H #include "unicode/utypes.h" #include "unicode/uobject.h" #include "uhash.h" #include "uassert.h" U_NAMESPACE_BEGIN /** * <p>Ultralightweight C++ implementation of an <tt>int64_t</tt> vector * that has a subset of methods from UVector32 * * <p>This is a very simple implementation, written to satisfy an * immediate porting need. As such, it is not completely fleshed out, * and it aims for simplicity and conformity. Nonetheless, it serves * its purpose (porting code from java that uses java.util.Vector) * well, and it could be easily made into a more robust vector class. * * <p><b>Design notes</b> * * <p>There is index bounds checking, but little is done about it. If * indices are out of bounds, either nothing happens, or zero is * returned. We <em>do</em> avoid indexing off into the weeds. * * <p>There is detection of out of memory, but the handling is very * coarse-grained -- similar to UnicodeString's protocol, but even * coarser. The class contains <em>one static flag</em> that is set * when any call to <tt>new</tt> returns zero. This allows the caller * to use several vectors and make just one check at the end to see if * a memory failure occurred. This is more efficient than making a * check after each call on each vector when doing many operations on * multiple vectors. The single static flag works best when memory * failures are infrequent, and when recovery options are limited or * nonexistent. * * <p><b>To do</b> * * <p>Improve the handling of index out of bounds errors. * */ class U_COMMON_API UVector64 : public UObject { private: int32_t count; int32_t capacity; int32_t maxCapacity; // Limit beyond which capacity is not permitted to grow. int64_t* elements; public: UVector64(UErrorCode &status); UVector64(int32_t initialCapacity, UErrorCode &status); virtual ~UVector64(); /** * Assign this object to another (make this a copy of 'other'). * Use the 'assign' function to assign each element. */ void assign(const UVector64& other, UErrorCode &ec); /** * Compare this vector with another. They will be considered * equal if they are of the same size and all elements are equal, * as compared using this object's comparer. */ UBool operator==(const UVector64& other); /** * Equivalent to !operator==() */ inline UBool operator!=(const UVector64& other); //------------------------------------------------------------ // subset of java.util.Vector API //------------------------------------------------------------ inline void addElement(int64_t elem, UErrorCode &status); void setElementAt(int64_t elem, int32_t index); void insertElementAt(int64_t elem, int32_t index, UErrorCode &status); inline int64_t elementAti(int32_t index) const; //UBool equals(const UVector64 &other) const; inline int64_t lastElementi(void) const; //int32_t indexOf(int64_t elem, int32_t startIndex = 0) const; //UBool contains(int64_t elem) const; //UBool containsAll(const UVector64& other) const; //UBool removeAll(const UVector64& other); //UBool retainAll(const UVector64& other); //void removeElementAt(int32_t index); void removeAllElements(); inline int32_t size(void) const; inline UBool isEmpty(void) const { return count == 0; } // Inline. Use this one for speedy size check. inline UBool ensureCapacity(int32_t minimumCapacity, UErrorCode &status); // Out-of-line, handles actual growth. Called by ensureCapacity() when necessary. UBool expandCapacity(int32_t minimumCapacity, UErrorCode &status); /** * 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 slows with zero. */ void setSize(int32_t newSize); //------------------------------------------------------------ // New API //------------------------------------------------------------ //UBool containsNone(const UVector64& other) const; //void sortedInsert(int64_t elem, UErrorCode& ec); /** * Returns a pointer to the internal array holding the vector. */ inline int64_t *getBuffer() const; /** * Set the maximum allowed buffer capacity for this vector/stack. * Default with no limit set is unlimited, go until malloc() fails. * A Limit of zero means unlimited capacity. * Units are vector elements (64 bits each), not bytes. */ void setMaxCapacity(int32_t limit); /** * ICU "poor man's RTTI", returns a UClassID for this class. */ static UClassID U_EXPORT2 getStaticClassID(); /** * ICU "poor man's RTTI", returns a UClassID for the actual class. */ virtual UClassID getDynamicClassID() const; private: void _init(int32_t initialCapacity, UErrorCode &status); // Disallow UVector64(const UVector64&); // Disallow UVector64& operator=(const UVector64&); // API Functions for Stack operations. // In the original UVector, these were in a separate derived class, UStack. // Here in UVector64, they are all together. public: //UBool empty(void) const; // TODO: redundant, same as empty(). Remove it? //int64_t peeki(void) const; inline int64_t popi(void); inline int64_t push(int64_t i, UErrorCode &status); inline int64_t *reserveBlock(int32_t size, UErrorCode &status); inline int64_t *popFrame(int32_t size); }; // UVector64 inlines inline UBool UVector64::ensureCapacity(int32_t minimumCapacity, UErrorCode &status) { if ((minimumCapacity >= 0) && (capacity >= minimumCapacity)) { return true; } else { return expandCapacity(minimumCapacity, status); } } inline int64_t UVector64::elementAti(int32_t index) const { return (0 <= index && index < count) ? elements[index] : 0; } inline void UVector64::addElement(int64_t elem, UErrorCode &status) { if (ensureCapacity(count + 1, status)) { elements[count] = elem; count++; } } inline int64_t *UVector64::reserveBlock(int32_t size, UErrorCode &status) { if (ensureCapacity(count+size, status) == false) { return NULL; } int64_t *rp = elements+count; count += size; return rp; } inline int64_t *UVector64::popFrame(int32_t size) { U_ASSERT(count >= size); count -= size; if (count < 0) { count = 0; } return elements+count-size; } inline int32_t UVector64::size(void) const { return count; } inline int64_t UVector64::lastElementi(void) const { return elementAti(count-1); } inline UBool UVector64::operator!=(const UVector64& other) { return !operator==(other); } inline int64_t *UVector64::getBuffer() const { return elements; } // UStack inlines inline int64_t UVector64::push(int64_t i, UErrorCode &status) { addElement(i, status); return i; } inline int64_t UVector64::popi(void) { int64_t result = 0; if (count > 0) { count--; result = elements[count]; } return result; } U_NAMESPACE_END #endif