source/common/chariter.cpp

   1 // Copyright (C) 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