1 // © 2016 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 /*
4 **********************************************************************
5 *   Copyright (C) 1999-2011, International Business Machines
6 *   Corporation and others.  All Rights Reserved.
7 **********************************************************************
8 */
9 
10 #include "unicode/chariter.h"
11 
12 U_NAMESPACE_BEGIN
13 
14 ForwardCharacterIterator::~ForwardCharacterIterator() {}
15 ForwardCharacterIterator::ForwardCharacterIterator()
16 : UObject()
17 {}
18 ForwardCharacterIterator::ForwardCharacterIterator(const ForwardCharacterIterator &other)
19 : UObject(other)
20 {}
21 
22 
23 CharacterIterator::CharacterIterator()
24 : textLength(0), pos(0), begin(0), end(0) {
25 }
26 
27 CharacterIterator::CharacterIterator(int32_t length)
28 : textLength(length), pos(0), begin(0), end(length) {
29     if(textLength < 0) {
30         textLength = end = 0;
31     }
32 }
33 
34 CharacterIterator::CharacterIterator(int32_t length, int32_t position)
35 : textLength(length), pos(position), begin(0), end(length) {
36     if(textLength < 0) {
37         textLength = end = 0;
38     }
39     if(pos < 0) {
40         pos = 0;
41     } else if(pos > end) {
42         pos = end;
43     }
44 }
45 
46 CharacterIterator::CharacterIterator(int32_t length, int32_t textBegin, int32_t textEnd, int32_t position)
47 : textLength(length), pos(position), begin(textBegin), end(textEnd) {
48     if(textLength < 0) {
49         textLength = 0;
50     }
51     if(begin < 0) {
52         begin = 0;
53     } else if(begin > textLength) {
54         begin = textLength;
55     }
56     if(end < begin) {
57         end = begin;
58     } else if(end > textLength) {
59         end = textLength;
60     }
61     if(pos < begin) {
62         pos = begin;
63     } else if(pos > end) {
64         pos = end;
65     }
66 }
67 
68 CharacterIterator::~CharacterIterator() {}
69 
70 CharacterIterator::CharacterIterator(const CharacterIterator &that) :
71 ForwardCharacterIterator(that),
72 textLength(that.textLength), pos(that.pos), begin(that.begin), end(that.end)
73 {
74 }
75 
76 CharacterIterator &
77 CharacterIterator::operator=(const CharacterIterator &that) {
78     ForwardCharacterIterator::operator=(that);
79     textLength = that.textLength;
80     pos = that.pos;
81     begin = that.begin;
82     end = that.end;
83     return *this;
84 }
85 
86 // implementing first[32]PostInc() directly in a subclass should be faster
87 // but these implementations make subclassing a little easier
88 UChar
89 CharacterIterator::firstPostInc(void) {
90     setToStart();
91     return nextPostInc();
92 }
93 
94 UChar32
95 CharacterIterator::first32PostInc(void) {
96     setToStart();
97     return next32PostInc();
98 }
99 
100 U_NAMESPACE_END
101