1/*
2**********************************************************************
3*   Copyright (C) 1999-2011, International Business Machines
4*   Corporation and others.  All Rights Reserved.
5**********************************************************************
6*/
7
8#include "unicode/chariter.h"
9
10U_NAMESPACE_BEGIN
11
12ForwardCharacterIterator::~ForwardCharacterIterator() {}
13ForwardCharacterIterator::ForwardCharacterIterator()
14: UObject()
15{}
16ForwardCharacterIterator::ForwardCharacterIterator(const ForwardCharacterIterator &other)
17: UObject(other)
18{}
19
20
21CharacterIterator::CharacterIterator()
22: textLength(0), pos(0), begin(0), end(0) {
23}
24
25CharacterIterator::CharacterIterator(int32_t length)
26: textLength(length), pos(0), begin(0), end(length) {
27    if(textLength < 0) {
28        textLength = end = 0;
29    }
30}
31
32CharacterIterator::CharacterIterator(int32_t length, int32_t position)
33: textLength(length), pos(position), begin(0), end(length) {
34    if(textLength < 0) {
35        textLength = end = 0;
36    }
37    if(pos < 0) {
38        pos = 0;
39    } else if(pos > end) {
40        pos = end;
41    }
42}
43
44CharacterIterator::CharacterIterator(int32_t length, int32_t textBegin, int32_t textEnd, int32_t position)
45: textLength(length), pos(position), begin(textBegin), end(textEnd) {
46    if(textLength < 0) {
47        textLength = 0;
48    }
49    if(begin < 0) {
50        begin = 0;
51    } else if(begin > textLength) {
52        begin = textLength;
53    }
54    if(end < begin) {
55        end = begin;
56    } else if(end > textLength) {
57        end = textLength;
58    }
59    if(pos < begin) {
60        pos = begin;
61    } else if(pos > end) {
62        pos = end;
63    }
64}
65
66CharacterIterator::~CharacterIterator() {}
67
68CharacterIterator::CharacterIterator(const CharacterIterator &that) :
69ForwardCharacterIterator(that),
70textLength(that.textLength), pos(that.pos), begin(that.begin), end(that.end)
71{
72}
73
74CharacterIterator &
75CharacterIterator::operator=(const CharacterIterator &that) {
76    ForwardCharacterIterator::operator=(that);
77    textLength = that.textLength;
78    pos = that.pos;
79    begin = that.begin;
80    end = that.end;
81    return *this;
82}
83
84// implementing first[32]PostInc() directly in a subclass should be faster
85// but these implementations make subclassing a little easier
86UChar
87CharacterIterator::firstPostInc(void) {
88    setToStart();
89    return nextPostInc();
90}
91
92UChar32
93CharacterIterator::first32PostInc(void) {
94    setToStart();
95    return next32PostInc();
96}
97
98U_NAMESPACE_END
99