532 lines
21 KiB
C++
532 lines
21 KiB
C++
|
// © 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"
|
||
|
|
|
||
|
|
/**
|
||
|
|
* \file
|
||
|
|
* \brief C++ API: C++ class Edits for low-level string transformations on styled text.
|
||
|
|
*/
|
||
|
|
|
||
|
|
U_NAMESPACE_BEGIN
|
||
|
|
|
||
|
|
class UnicodeString;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Records lengths of string edits but not replacement text. Supports replacements, insertions, deletions
|
||
|
|
* in linear progression. Does not support moving/reordering of text.
|
||
|
|
*
|
||
|
|
* There are two types of edits: <em>change edits</em> and <em>no-change edits</em>. Add edits to
|
||
|
|
* instances of this class using {@link #addReplace(int32_t, int32_t)} (for change edits) and
|
||
|
|
* {@link #addUnchanged(int32_t)} (for no-change edits). Change edits are retained with full granularity,
|
||
|
|
* whereas adjacent no-change edits are always merged together. In no-change edits, there is a one-to-one
|
||
|
|
* mapping between code points in the source and destination strings.
|
||
|
|
*
|
||
|
|
* After all edits have been added, instances of this class should be considered immutable, and an
|
||
|
|
* {@link Edits::Iterator} can be used for queries.
|
||
|
|
*
|
||
|
|
* There are four flavors of Edits::Iterator:
|
||
|
|
*
|
||
|
|
* <ul>
|
||
|
|
* <li>{@link #getFineIterator()} retains full granularity of change edits.
|
||
|
|
* <li>{@link #getFineChangesIterator()} retains full granularity of change edits, and when calling
|
||
|
|
* next() on the iterator, skips over no-change edits (unchanged regions).
|
||
|
|
* <li>{@link #getCoarseIterator()} treats adjacent change edits as a single edit. (Adjacent no-change
|
||
|
|
* edits are automatically merged during the construction phase.)
|
||
|
|
* <li>{@link #getCoarseChangesIterator()} treats adjacent change edits as a single edit, and when
|
||
|
|
* calling next() on the iterator, skips over no-change edits (unchanged regions).
|
||
|
|
* </ul>
|
||
|
|
*
|
||
|
|
* For example, consider the string "abcßDeF", which case-folds to "abcssdef". This string has the
|
||
|
|
* following fine edits:
|
||
|
|
* <ul>
|
||
|
|
* <li>abc ⇨ abc (no-change)
|
||
|
|
* <li>ß ⇨ ss (change)
|
||
|
|
* <li>D ⇨ d (change)
|
||
|
|
* <li>e ⇨ e (no-change)
|
||
|
|
* <li>F ⇨ f (change)
|
||
|
|
* </ul>
|
||
|
|
* and the following coarse edits (note how adjacent change edits get merged together):
|
||
|
|
* <ul>
|
||
|
|
* <li>abc ⇨ abc (no-change)
|
||
|
|
* <li>ßD ⇨ ssd (change)
|
||
|
|
* <li>e ⇨ e (no-change)
|
||
|
|
* <li>F ⇨ f (change)
|
||
|
|
* </ul>
|
||
|
|
*
|
||
|
|
* The "fine changes" and "coarse changes" iterators will step through only the change edits when their
|
||
|
|
* `Edits::Iterator::next()` methods are called. They are identical to the non-change iterators when
|
||
|
|
* their `Edits::Iterator::findSourceIndex()` or `Edits::Iterator::findDestinationIndex()`
|
||
|
|
* methods are used to walk through the string.
|
||
|
|
*
|
||
|
|
* For examples of how to use this class, see the test `TestCaseMapEditsIteratorDocs` in
|
||
|
|
* UCharacterCaseTest.java.
|
||
|
|
*
|
||
|
|
* An Edits object tracks a separate UErrorCode, but ICU string transformation functions
|
||
|
|
* (e.g., case mapping functions) merge any such errors into their API's UErrorCode.
|
||
|
|
*
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
class U_COMMON_API Edits U_FINAL : public UMemory {
|
||
|
|
public:
|
||
|
|
/**
|
||
|
|
* Constructs an empty object.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Edits() :
|
||
|
|
array(stackArray), capacity(STACK_CAPACITY), length(0), delta(0), numChanges(0),
|
||
|
|
errorCode_(U_ZERO_ERROR) {}
|
||
|
|
/**
|
||
|
|
* Copy constructor.
|
||
|
|
* @param other source edits
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
Edits(const Edits &other) :
|
||
|
|
array(stackArray), capacity(STACK_CAPACITY), length(other.length),
|
||
|
|
delta(other.delta), numChanges(other.numChanges),
|
||
|
|
errorCode_(other.errorCode_) {
|
||
|
|
copyArray(other);
|
||
|
|
}
|
||
|
|
/**
|
||
|
|
* Move constructor, might leave src empty.
|
||
|
|
* This object will have the same contents that the source object had.
|
||
|
|
* @param src source edits
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
Edits(Edits &&src) U_NOEXCEPT :
|
||
|
|
array(stackArray), capacity(STACK_CAPACITY), length(src.length),
|
||
|
|
delta(src.delta), numChanges(src.numChanges),
|
||
|
|
errorCode_(src.errorCode_) {
|
||
|
|
moveArray(src);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Destructor.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
~Edits();
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Assignment operator.
|
||
|
|
* @param other source edits
|
||
|
|
* @return *this
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
Edits &operator=(const Edits &other);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Move assignment operator, might leave src empty.
|
||
|
|
* This object will have the same contents that the source object had.
|
||
|
|
* The behavior is undefined if *this and src are the same object.
|
||
|
|
* @param src source edits
|
||
|
|
* @return *this
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
Edits &operator=(Edits &&src) U_NOEXCEPT;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Resets the data but may not release memory.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
void reset() U_NOEXCEPT;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Adds a no-change edit: a record for an unchanged segment of text.
|
||
|
|
* Normally called from inside ICU string transformation functions, not user code.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
void addUnchanged(int32_t unchangedLength);
|
||
|
|
/**
|
||
|
|
* Adds a change edit: a record for a text replacement/insertion/deletion.
|
||
|
|
* Normally called from inside ICU string transformation functions, not user code.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
void addReplace(int32_t oldLength, int32_t newLength);
|
||
|
|
/**
|
||
|
|
* Sets the UErrorCode if an error occurred while recording edits.
|
||
|
|
* Preserves older error codes in the outErrorCode.
|
||
|
|
* Normally called from inside ICU string transformation functions, not user code.
|
||
|
|
* @param outErrorCode Set to an error code if it does not contain one already
|
||
|
|
* and an error occurred while recording edits.
|
||
|
|
* Otherwise unchanged.
|
||
|
|
* @return true if U_FAILURE(outErrorCode)
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
UBool copyErrorTo(UErrorCode &outErrorCode) const;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* How much longer is the new text compared with the old text?
|
||
|
|
* @return new length minus old length
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
int32_t lengthDelta() const { return delta; }
|
||
|
|
/**
|
||
|
|
* @return true if there are any change edits
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
UBool hasChanges() const { return numChanges != 0; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @return the number of change edits
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
int32_t numberOfChanges() const { return numChanges; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Access to the list of edits.
|
||
|
|
*
|
||
|
|
* At any moment in time, an instance of this class points to a single edit: a "window" into a span
|
||
|
|
* of the source string and the corresponding span of the destination string. The source string span
|
||
|
|
* starts at {@link #sourceIndex()} and runs for {@link #oldLength()} chars; the destination string
|
||
|
|
* span starts at {@link #destinationIndex()} and runs for {@link #newLength()} chars.
|
||
|
|
*
|
||
|
|
* The iterator can be moved between edits using the `next()`, `findSourceIndex(int32_t, UErrorCode &)`,
|
||
|
|
* and `findDestinationIndex(int32_t, UErrorCode &)` methods.
|
||
|
|
* Calling any of these methods mutates the iterator to make it point to the corresponding edit.
|
||
|
|
*
|
||
|
|
* For more information, see the documentation for {@link Edits}.
|
||
|
|
*
|
||
|
|
* @see getCoarseIterator
|
||
|
|
* @see getFineIterator
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
struct U_COMMON_API Iterator U_FINAL : public UMemory {
|
||
|
|
/**
|
||
|
|
* Default constructor, empty iterator.
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
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) {}
|
||
|
|
/**
|
||
|
|
* Copy constructor.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Iterator(const Iterator &other) = default;
|
||
|
|
/**
|
||
|
|
* Assignment operator.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Iterator &operator=(const Iterator &other) = default;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Advances the iterator to the next edit.
|
||
|
|
* @param errorCode ICU error code. Its input value must pass the U_SUCCESS() test,
|
||
|
|
* or else the function returns immediately. Check for U_FAILURE()
|
||
|
|
* on output or use with function chaining. (See User Guide for details.)
|
||
|
|
* @return true if there is another edit
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
UBool next(UErrorCode &errorCode) { return next(onlyChanges_, errorCode); }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Moves the iterator to the edit that contains the source index.
|
||
|
|
* The source index may be found in a no-change edit
|
||
|
|
* even if normal iteration would skip no-change edits.
|
||
|
|
* Normal iteration can continue from a found edit.
|
||
|
|
*
|
||
|
|
* The iterator state before this search logically does not matter.
|
||
|
|
* (It may affect the performance of the search.)
|
||
|
|
*
|
||
|
|
* The iterator state after this search is undefined
|
||
|
|
* if the source index is out of bounds for the source string.
|
||
|
|
*
|
||
|
|
* @param i source index
|
||
|
|
* @param errorCode ICU error code. Its input value must pass the U_SUCCESS() test,
|
||
|
|
* or else the function returns immediately. Check for U_FAILURE()
|
||
|
|
* on output or use with function chaining. (See User Guide for details.)
|
||
|
|
* @return true if the edit for the source index was found
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
UBool findSourceIndex(int32_t i, UErrorCode &errorCode) {
|
||
|
|
return findIndex(i, true, errorCode) == 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Moves the iterator to the edit that contains the destination index.
|
||
|
|
* The destination index may be found in a no-change edit
|
||
|
|
* even if normal iteration would skip no-change edits.
|
||
|
|
* Normal iteration can continue from a found edit.
|
||
|
|
*
|
||
|
|
* The iterator state before this search logically does not matter.
|
||
|
|
* (It may affect the performance of the search.)
|
||
|
|
*
|
||
|
|
* The iterator state after this search is undefined
|
||
|
|
* if the source index is out of bounds for the source string.
|
||
|
|
*
|
||
|
|
* @param i destination index
|
||
|
|
* @param errorCode ICU error code. Its input value must pass the U_SUCCESS() test,
|
||
|
|
* or else the function returns immediately. Check for U_FAILURE()
|
||
|
|
* on output or use with function chaining. (See User Guide for details.)
|
||
|
|
* @return true if the edit for the destination index was found
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
UBool findDestinationIndex(int32_t i, UErrorCode &errorCode) {
|
||
|
|
return findIndex(i, false, errorCode) == 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the destination index corresponding to the given source index.
|
||
|
|
* If the source index is inside a change edit (not at its start),
|
||
|
|
* then the destination index at the end of that edit is returned,
|
||
|
|
* since there is no information about index mapping inside a change edit.
|
||
|
|
*
|
||
|
|
* (This means that indexes to the start and middle of an edit,
|
||
|
|
* for example around a grapheme cluster, are mapped to indexes
|
||
|
|
* encompassing the entire edit.
|
||
|
|
* The alternative, mapping an interior index to the start,
|
||
|
|
* would map such an interval to an empty one.)
|
||
|
|
*
|
||
|
|
* This operation will usually but not always modify this object.
|
||
|
|
* The iterator state after this search is undefined.
|
||
|
|
*
|
||
|
|
* @param i source index
|
||
|
|
* @param errorCode ICU error code. Its input value must pass the U_SUCCESS() test,
|
||
|
|
* or else the function returns immediately. Check for U_FAILURE()
|
||
|
|
* on output or use with function chaining. (See User Guide for details.)
|
||
|
|
* @return destination index; undefined if i is not 0..string length
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
int32_t destinationIndexFromSourceIndex(int32_t i, UErrorCode &errorCode);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the source index corresponding to the given destination index.
|
||
|
|
* If the destination index is inside a change edit (not at its start),
|
||
|
|
* then the source index at the end of that edit is returned,
|
||
|
|
* since there is no information about index mapping inside a change edit.
|
||
|
|
*
|
||
|
|
* (This means that indexes to the start and middle of an edit,
|
||
|
|
* for example around a grapheme cluster, are mapped to indexes
|
||
|
|
* encompassing the entire edit.
|
||
|
|
* The alternative, mapping an interior index to the start,
|
||
|
|
* would map such an interval to an empty one.)
|
||
|
|
*
|
||
|
|
* This operation will usually but not always modify this object.
|
||
|
|
* The iterator state after this search is undefined.
|
||
|
|
*
|
||
|
|
* @param i destination index
|
||
|
|
* @param errorCode ICU error code. Its input value must pass the U_SUCCESS() test,
|
||
|
|
* or else the function returns immediately. Check for U_FAILURE()
|
||
|
|
* on output or use with function chaining. (See User Guide for details.)
|
||
|
|
* @return source index; undefined if i is not 0..string length
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
int32_t sourceIndexFromDestinationIndex(int32_t i, UErrorCode &errorCode);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns whether the edit currently represented by the iterator is a change edit.
|
||
|
|
*
|
||
|
|
* @return true if this edit replaces oldLength() units with newLength() different ones.
|
||
|
|
* false if oldLength units remain unchanged.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
UBool hasChange() const { return changed; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The length of the current span in the source string, which starts at {@link #sourceIndex}.
|
||
|
|
*
|
||
|
|
* @return the number of units in the original string which are replaced or remain unchanged.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
int32_t oldLength() const { return oldLength_; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The length of the current span in the destination string, which starts at
|
||
|
|
* {@link #destinationIndex}, or in the replacement string, which starts at
|
||
|
|
* {@link #replacementIndex}.
|
||
|
|
*
|
||
|
|
* @return the number of units in the modified string, if hasChange() is true.
|
||
|
|
* Same as oldLength if hasChange() is false.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
int32_t newLength() const { return newLength_; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The start index of the current span in the source string; the span has length
|
||
|
|
* {@link #oldLength}.
|
||
|
|
*
|
||
|
|
* @return the current index into the source string
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
int32_t sourceIndex() const { return srcIndex; }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The start index of the current span in the replacement string; the span has length
|
||
|
|
* {@link #newLength}. Well-defined only if the current edit is a change edit.
|
||
|
|
*
|
||
|
|
* The *replacement string* is the concatenation of all substrings of the destination
|
||
|
|
* string corresponding to change edits.
|
||
|
|
*
|
||
|
|
* This method is intended to be used together with operations that write only replacement
|
||
|
|
* characters (e.g. operations specifying the \ref U_OMIT_UNCHANGED_TEXT option).
|
||
|
|
* The source string can then be modified in-place.
|
||
|
|
*
|
||
|
|
* @return the current index into the replacement-characters-only string,
|
||
|
|
* not counting unchanged spans
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
int32_t replacementIndex() const {
|
||
|
|
// TODO: Throw an exception if we aren't in a change edit?
|
||
|
|
return replIndex;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The start index of the current span in the destination string; the span has length
|
||
|
|
* {@link #newLength}.
|
||
|
|
*
|
||
|
|
* @return the current index into the full destination string
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
int32_t destinationIndex() const { return destIndex; }
|
||
|
|
|
||
|
|
#ifndef U_HIDE_INTERNAL_API
|
||
|
|
/**
|
||
|
|
* A string representation of the current edit represented by the iterator for debugging. You
|
||
|
|
* should not depend on the contents of the return string.
|
||
|
|
* @internal
|
||
|
|
*/
|
||
|
|
UnicodeString& toString(UnicodeString& appendTo) const;
|
||
|
|
#endif // U_HIDE_INTERNAL_API
|
||
|
|
|
||
|
|
private:
|
||
|
|
friend class Edits;
|
||
|
|
|
||
|
|
Iterator(const uint16_t *a, int32_t len, UBool oc, UBool crs);
|
||
|
|
|
||
|
|
int32_t readLength(int32_t head);
|
||
|
|
void updateNextIndexes();
|
||
|
|
void updatePreviousIndexes();
|
||
|
|
UBool noNext();
|
||
|
|
UBool next(UBool onlyChanges, UErrorCode &errorCode);
|
||
|
|
UBool previous(UErrorCode &errorCode);
|
||
|
|
/** @return -1: error or i<0; 0: found; 1: i>=string length */
|
||
|
|
int32_t findIndex(int32_t i, UBool findSource, UErrorCode &errorCode);
|
||
|
|
|
||
|
|
const uint16_t *array;
|
||
|
|
int32_t index, length;
|
||
|
|
// 0 if we are not within compressed equal-length changes.
|
||
|
|
// Otherwise the number of remaining changes, including the current one.
|
||
|
|
int32_t remaining;
|
||
|
|
UBool onlyChanges_, coarse;
|
||
|
|
|
||
|
|
int8_t dir; // iteration direction: back(<0), initial(0), forward(>0)
|
||
|
|
UBool changed;
|
||
|
|
int32_t oldLength_, newLength_;
|
||
|
|
int32_t srcIndex, replIndex, destIndex;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an Iterator for coarse-grained change edits
|
||
|
|
* (adjacent change edits are treated as one).
|
||
|
|
* Can be used to perform simple string updates.
|
||
|
|
* Skips no-change edits.
|
||
|
|
* @return an Iterator that merges adjacent changes.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Iterator getCoarseChangesIterator() const {
|
||
|
|
return Iterator(array, length, true, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an Iterator for coarse-grained change and no-change edits
|
||
|
|
* (adjacent change edits are treated as one).
|
||
|
|
* Can be used to perform simple string updates.
|
||
|
|
* Adjacent change edits are treated as one edit.
|
||
|
|
* @return an Iterator that merges adjacent changes.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Iterator getCoarseIterator() const {
|
||
|
|
return Iterator(array, length, false, true);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an Iterator for fine-grained change edits
|
||
|
|
* (full granularity of change edits is retained).
|
||
|
|
* Can be used for modifying styled text.
|
||
|
|
* Skips no-change edits.
|
||
|
|
* @return an Iterator that separates adjacent changes.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Iterator getFineChangesIterator() const {
|
||
|
|
return Iterator(array, length, true, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Returns an Iterator for fine-grained change and no-change edits
|
||
|
|
* (full granularity of change edits is retained).
|
||
|
|
* Can be used for modifying styled text.
|
||
|
|
* @return an Iterator that separates adjacent changes.
|
||
|
|
* @stable ICU 59
|
||
|
|
*/
|
||
|
|
Iterator getFineIterator() const {
|
||
|
|
return Iterator(array, length, false, false);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Merges the two input Edits and appends the result to this object.
|
||
|
|
*
|
||
|
|
* Consider two string transformations (for example, normalization and case mapping)
|
||
|
|
* where each records Edits in addition to writing an output string.<br>
|
||
|
|
* Edits ab reflect how substrings of input string a
|
||
|
|
* map to substrings of intermediate string b.<br>
|
||
|
|
* Edits bc reflect how substrings of intermediate string b
|
||
|
|
* map to substrings of output string c.<br>
|
||
|
|
* This function merges ab and bc such that the additional edits
|
||
|
|
* recorded in this object reflect how substrings of input string a
|
||
|
|
* map to substrings of output string c.
|
||
|
|
*
|
||
|
|
* If unrelated Edits are passed in where the output string of the first
|
||
|
|
* has a different length than the input string of the second,
|
||
|
|
* then a U_ILLEGAL_ARGUMENT_ERROR is reported.
|
||
|
|
*
|
||
|
|
* @param ab reflects how substrings of input string a
|
||
|
|
* map to substrings of intermediate string b.
|
||
|
|
* @param bc reflects how substrings of intermediate string b
|
||
|
|
* map to substrings of output string c.
|
||
|
|
* @param errorCode ICU error code. Its input value must pass the U_SUCCESS() test,
|
||
|
|
* or else the function returns immediately. Check for U_FAILURE()
|
||
|
|
* on output or use with function chaining. (See User Guide for details.)
|
||
|
|
* @return *this, with the merged edits appended
|
||
|
|
* @stable ICU 60
|
||
|
|
*/
|
||
|
|
Edits &mergeAndAppend(const Edits &ab, const Edits &bc, UErrorCode &errorCode);
|
||
|
|
|
||
|
|
private:
|
||
|
|
void releaseArray() U_NOEXCEPT;
|
||
|
|
Edits ©Array(const Edits &other);
|
||
|
|
Edits &moveArray(Edits &src) U_NOEXCEPT;
|
||
|
|
|
||
|
|
void setLastUnit(int32_t last) { array[length - 1] = (uint16_t)last; }
|
||
|
|
int32_t lastUnit() const { return length > 0 ? array[length - 1] : 0xffff; }
|
||
|
|
|
||
|
|
void append(int32_t r);
|
||
|
|
UBool growArray();
|
||
|
|
|
||
|
|
static const int32_t STACK_CAPACITY = 100;
|
||
|
|
uint16_t *array;
|
||
|
|
int32_t capacity;
|
||
|
|
int32_t length;
|
||
|
|
int32_t delta;
|
||
|
|
int32_t numChanges;
|
||
|
|
UErrorCode errorCode_;
|
||
|
|
uint16_t stackArray[STACK_CAPACITY];
|
||
|
|
};
|
||
|
|
|
||
|
|
U_NAMESPACE_END
|
||
|
|
|
||
|
|
#endif /* U_SHOW_CPLUSPLUS_API */
|
||
|
|
|
||
|
|
#endif // __EDITS_H__
|