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