edits.h

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
 
// edits.h
// created: 2016dec30 Markus W. Scherer
 
#ifndef __EDITS_H__
#define __EDITS_H__
 
#include "unicode/utypes.h"
 
#if U_SHOW_CPLUSPLUS_API
 
#include "unicode/uobject.h"
 
U_NAMESPACE_BEGIN
 
class UnicodeString;
 
class U_COMMON_API Edits final : public UMemory {
public:
    Edits() :
            array(stackArray), capacity(STACK_CAPACITY), length(0), delta(0), numChanges(0),
            errorCode_(U_ZERO_ERROR) {}
    Edits(const Edits &other) :
            array(stackArray), capacity(STACK_CAPACITY), length(other.length),
            delta(other.delta), numChanges(other.numChanges),
            errorCode_(other.errorCode_) {
        copyArray(other);
    }
    Edits(Edits &&src) noexcept :
            array(stackArray), capacity(STACK_CAPACITY), length(src.length),
            delta(src.delta), numChanges(src.numChanges),
            errorCode_(src.errorCode_) {
        moveArray(src);
    }
 
    ~Edits();
 
    Edits &operator=(const Edits &other);
 
    Edits &operator=(Edits &&src) noexcept;
 
    void reset() noexcept;
 
    void addUnchanged(int32_t unchangedLength);
    void addReplace(int32_t oldLength, int32_t newLength);
    UBool copyErrorTo(UErrorCode &outErrorCode) const;
 
    int32_t lengthDelta() const { return delta; }
    UBool hasChanges() const { return numChanges != 0; }
 
    int32_t numberOfChanges() const { return numChanges; }
 
    struct U_COMMON_API Iterator final : public UMemory {
        Iterator() :
                array(nullptr), index(0), length(0),
                remaining(0), onlyChanges_(false), coarse(false),
                dir(0), changed(false), oldLength_(0), newLength_(0),
                srcIndex(0), replIndex(0), destIndex(0) {}
        Iterator(const Iterator &other) = default;
        Iterator &operator=(const Iterator &other) = default;