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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/********************************************************************
* COPYRIGHT:
* Copyright (c) 1997-2003, International Business Machines Corporation and
* others. All Rights Reserved.
********************************************************************/
/* file name: sfwdchit.cpp
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*/
#include "sfwdchit.h"
#include "unicode/ustring.h"
#include "unicode/unistr.h"
#include "uhash.h"
#include "cmemory.h"
// A hash code of kInvalidHashCode indicates that the has code needs
// to be computed. A hash code of kEmptyHashCode is used for empty keys
// and for any key whose computed hash code is kInvalidHashCode.
const int32_t SimpleFwdCharIterator::kInvalidHashCode = 0;
const int32_t SimpleFwdCharIterator::kEmptyHashCode = 1;
#if 0 // not used
SimpleFwdCharIterator::SimpleFwdCharIterator(const UnicodeString& s) {
fHashCode = kInvalidHashCode;
fLen = s.length();
fStart = new char16_t[fLen];
if(fStart == nullptr) {
fBogus = true;
} else {
fEnd = fStart+fLen;
fCurrent = fStart;
fBogus = false;
s.extract(0, fLen, fStart);
}
}
#endif
SimpleFwdCharIterator::SimpleFwdCharIterator(char16_t *s, int32_t len, UBool adopt) {
fHashCode = kInvalidHashCode;
fLen = len==-1 ? u_strlen(s) : len;
if(adopt == false) {
fStart = new char16_t[fLen];
if(fStart == nullptr) {
fBogus = true;
} else {
uprv_memcpy(fStart, s, fLen);
fEnd = fStart+fLen;
fCurrent = fStart;
fBogus = false;
}
} else { // adopt = true
fCurrent = fStart = s;
fEnd = fStart + fLen;
fBogus = false;
}
}
SimpleFwdCharIterator::~SimpleFwdCharIterator() {
delete[] fStart;
}
#if 0 // not used
bool SimpleFwdCharIterator::operator==(const ForwardCharacterIterator& that) const {
if(this == &that) {
return true;
}
/*
if(that->fHashCode != kInvalidHashCode && this->fHashCode = that->fHashCode) {
return true;
}
if(this->fStart == that->fStart) {
return true;
}
if(this->fLen == that->fLen && uprv_memcmp(this->fStart, that->fStart, this->fLen) {
return true;
}
*/
return false;
}
#endif
int32_t SimpleFwdCharIterator::hashCode() const {
if (fHashCode == kInvalidHashCode)
{
UHashTok key;
key.pointer = fStart;
const_cast<SimpleFwdCharIterator*>(this)->fHashCode = uhash_hashUChars(key);
}
return fHashCode;
}
UClassID SimpleFwdCharIterator::getDynamicClassID() const {
return nullptr;
}
char16_t SimpleFwdCharIterator::nextPostInc() {
if(fCurrent == fEnd) {
return ForwardCharacterIterator::DONE;
} else {
return *(fCurrent)++;
}
}
UChar32 SimpleFwdCharIterator::next32PostInc() {
return ForwardCharacterIterator::DONE;
}
UBool SimpleFwdCharIterator::hasNext() {
return fCurrent < fEnd;
}
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