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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
******************************************************************************
* Copyright (C) 1998-2012, International Business Machines Corporation and
* others. All Rights Reserved.
******************************************************************************
*/
#include "utypeinfo.h" // for 'typeid' to work
#include "unicode/uchriter.h"
#include "unicode/ustring.h"
#include "unicode/utf16.h"
#include "ustr_imp.h"
U_NAMESPACE_BEGIN
UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UCharCharacterIterator)
UCharCharacterIterator::UCharCharacterIterator()
: CharacterIterator(),
text(nullptr)
{
// never default construct!
}
UCharCharacterIterator::UCharCharacterIterator(ConstChar16Ptr textPtr,
int32_t length)
: CharacterIterator(textPtr != nullptr ? (length >= 0 ? length : u_strlen(textPtr)) : 0),
text(textPtr)
{
}
UCharCharacterIterator::UCharCharacterIterator(ConstChar16Ptr textPtr,
int32_t length,
int32_t position)
: CharacterIterator(textPtr != nullptr ? (length >= 0 ? length : u_strlen(textPtr)) : 0, position),
text(textPtr)
{
}
UCharCharacterIterator::UCharCharacterIterator(ConstChar16Ptr textPtr,
int32_t length,
int32_t textBegin,
int32_t textEnd,
int32_t position)
: CharacterIterator(textPtr != nullptr ? (length >= 0 ? length : u_strlen(textPtr)) : 0,
textBegin, textEnd, position),
text(textPtr)
{
}
UCharCharacterIterator::UCharCharacterIterator(const UCharCharacterIterator& that)
: CharacterIterator(that),
text(that.text)
{
}
UCharCharacterIterator&
UCharCharacterIterator::operator=(const UCharCharacterIterator& that) {
CharacterIterator::operator=(that);
text = that.text;
return *this;
}
UCharCharacterIterator::~UCharCharacterIterator() {
}
bool
UCharCharacterIterator::operator==(const ForwardCharacterIterator& that) const {
if (this == &that) {
return true;
}
if (typeid(*this) != typeid(that)) {
return false;
}
const UCharCharacterIterator& realThat = static_cast<const UCharCharacterIterator&>(that);
return text == realThat.text
&& textLength == realThat.textLength
&& pos == realThat.pos
&& begin == realThat.begin
&& end == realThat.end;
}
int32_t
UCharCharacterIterator::hashCode() const {
return ustr_hashUCharsN(text, textLength) ^ pos ^ begin ^ end;
}
UCharCharacterIterator*
UCharCharacterIterator::clone() const {
return new UCharCharacterIterator(*this);
}
char16_t
UCharCharacterIterator::first() {
pos = begin;
if(pos < end) {
return text[pos];
} else {
return DONE;
}
}
char16_t
UCharCharacterIterator::firstPostInc() {
pos = begin;
if(pos < end) {
return text[pos++];
} else {
return DONE;
}
}
char16_t
UCharCharacterIterator::last() {
pos = end;
if(pos > begin) {
return text[--pos];
} else {
return DONE;
}
}
char16_t
UCharCharacterIterator::setIndex(int32_t position) {
if(position < begin) {
pos = begin;
} else if(position > end) {
pos = end;
} else {
pos = position;
}
if(pos < end) {
return text[pos];
} else {
return DONE;
}
}
char16_t
UCharCharacterIterator::current() const {
if (pos >= begin && pos < end) {
return text[pos];
} else {
return DONE;
}
}
char16_t
UCharCharacterIterator::next() {
if (pos + 1 < end) {
return text[++pos];
} else {
/* make current() return DONE */
pos = end;
return DONE;
}
}
char16_t
UCharCharacterIterator::nextPostInc() {
if (pos < end) {
return text[pos++];
} else {
return DONE;
}
}
UBool
UCharCharacterIterator::hasNext() {
return pos < end;
}
char16_t
UCharCharacterIterator::previous() {
if (pos > begin) {
return text[--pos];
} else {
return DONE;
}
}
UBool
UCharCharacterIterator::hasPrevious() {
return pos > begin;
}
UChar32
UCharCharacterIterator::first32() {
pos = begin;
if(pos < end) {
int32_t i = pos;
UChar32 c;
U16_NEXT(text, i, end, c);
return c;
} else {
return DONE;
}
}
UChar32
UCharCharacterIterator::first32PostInc() {
pos = begin;
if(pos < end) {
UChar32 c;
U16_NEXT(text, pos, end, c);
return c;
} else {
return DONE;
}
}
UChar32
UCharCharacterIterator::last32() {
pos = end;
if(pos > begin) {
UChar32 c;
U16_PREV(text, begin, pos, c);
return c;
} else {
return DONE;
}
}
UChar32
UCharCharacterIterator::setIndex32(int32_t position) {
if(position < begin) {
position = begin;
} else if(position > end) {
position = end;
}
if(position < end) {
U16_SET_CP_START(text, begin, position);
int32_t i = this->pos = position;
UChar32 c;
U16_NEXT(text, i, end, c);
return c;
} else {
this->pos = position;
return DONE;
}
}
UChar32
UCharCharacterIterator::current32() const {
if (pos >= begin && pos < end) {
UChar32 c;
U16_GET(text, begin, pos, end, c);
return c;
} else {
return DONE;
}
}
UChar32
UCharCharacterIterator::next32() {
if (pos < end) {
U16_FWD_1(text, pos, end);
if(pos < end) {
int32_t i = pos;
UChar32 c;
U16_NEXT(text, i, end, c);
return c;
}
}
/* make current() return DONE */
pos = end;
return DONE;
}
UChar32
UCharCharacterIterator::next32PostInc() {
if (pos < end) {
UChar32 c;
U16_NEXT(text, pos, end, c);
return c;
} else {
return DONE;
}
}
UChar32
UCharCharacterIterator::previous32() {
if (pos > begin) {
UChar32 c;
U16_PREV(text, begin, pos, c);
return c;
} else {
return DONE;
}
}
int32_t
UCharCharacterIterator::move(int32_t delta, CharacterIterator::EOrigin origin) {
switch(origin) {
case kStart:
pos = begin + delta;
break;
case kCurrent:
pos += delta;
break;
case kEnd:
pos = end + delta;
break;
default:
break;
}
if(pos < begin) {
pos = begin;
} else if(pos > end) {
pos = end;
}
return pos;
}
int32_t
UCharCharacterIterator::move32(int32_t delta, CharacterIterator::EOrigin origin) {
// this implementation relies on the "safe" version of the UTF macros
// (or the trustworthiness of the caller)
switch(origin) {
case kStart:
pos = begin;
if(delta > 0) {
U16_FWD_N(text, pos, end, delta);
}
break;
case kCurrent:
if(delta > 0) {
U16_FWD_N(text, pos, end, delta);
} else {
U16_BACK_N(text, begin, pos, -delta);
}
break;
case kEnd:
pos = end;
if(delta < 0) {
U16_BACK_N(text, begin, pos, -delta);
}
break;
default:
break;
}
return pos;
}
void UCharCharacterIterator::setText(ConstChar16Ptr newText,
int32_t newTextLength) {
text = newText;
if (newText == nullptr || newTextLength < 0) {
newTextLength = 0;
}
end = textLength = newTextLength;
pos = begin = 0;
}
void
UCharCharacterIterator::getText(UnicodeString& result) {
result = UnicodeString(text, textLength);
}
U_NAMESPACE_END
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