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
~ForwardCharacterIterator()14 ForwardCharacterIterator::~ForwardCharacterIterator() {}
ForwardCharacterIterator()15 ForwardCharacterIterator::ForwardCharacterIterator()
16 : UObject()
17 {}
ForwardCharacterIterator(const ForwardCharacterIterator & other)18 ForwardCharacterIterator::ForwardCharacterIterator(const ForwardCharacterIterator &other)
19 : UObject(other)
20 {}
21
22
CharacterIterator()23 CharacterIterator::CharacterIterator()
24 : textLength(0), pos(0), begin(0), end(0) {
25 }
26
CharacterIterator(int32_t length)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
CharacterIterator(int32_t length,int32_t position)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
CharacterIterator(int32_t length,int32_t textBegin,int32_t textEnd,int32_t position)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
~CharacterIterator()68 CharacterIterator::~CharacterIterator() {}
69
CharacterIterator(const CharacterIterator & that)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 &
operator =(const CharacterIterator & that)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
firstPostInc(void)89 CharacterIterator::firstPostInc(void) {
90 setToStart();
91 return nextPostInc();
92 }
93
94 UChar32
first32PostInc(void)95 CharacterIterator::first32PostInc(void) {
96 setToStart();
97 return next32PostInc();
98 }
99
100 U_NAMESPACE_END
101