icuSources/common/chariter.cpp

   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
  10 U_NAMESPACE_BEGIN
  11
  12 ForwardCharacterIterator::~ForwardCharacterIterator() {}
  13 ForwardCharacterIterator::ForwardCharacterIterator()
  14 : UObject()
  15 {}
  16 ForwardCharacterIterator::ForwardCharacterIterator(const ForwardCharacterIterator &other)
  17 : UObject(other)
  18 {}
  19
  20
  21 CharacterIterator::CharacterIterator()
  22 : textLength(0), pos(0), begin(0), end(0) {
  23 }
  24
  25 CharacterIterator::CharacterIterator(int32_t length)
  26 : textLength(length), pos(0), begin(0), end(length) {
  27     if(textLength < 0) {
  28         textLength = end = 0;
  29     }
  30 }
  31
  32 CharacterIterator::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
  44 CharacterIterator::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
  66 CharacterIterator::~CharacterIterator() {}
  67
  68 CharacterIterator::CharacterIterator(const CharacterIterator &that) :
  69 ForwardCharacterIterator(that),
  70 textLength(that.textLength), pos(that.pos), begin(that.begin), end(that.end)
  71 {
  72 }
  73
  74 CharacterIterator &
  75 CharacterIterator::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
  86 UChar
  87 CharacterIterator::firstPostInc(void) {
  88     setToStart();
  89     return nextPostInc();
  90 }
  91
  92 UChar32
  93 CharacterIterator::first32PostInc(void) {
  94     setToStart();
  95     return next32PostInc();
  96 }
  97
  98 U_NAMESPACE_END