1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/intl/icu/source/common/uchriter.cpp Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,365 @@
1.4 +/*
1.5 +******************************************************************************
1.6 +* Copyright (C) 1998-2012, International Business Machines Corporation and
1.7 +* others. All Rights Reserved.
1.8 +******************************************************************************
1.9 +*/
1.10 +
1.11 +#include "utypeinfo.h" // for 'typeid' to work
1.12 +
1.13 +#include "unicode/uchriter.h"
1.14 +#include "unicode/ustring.h"
1.15 +#include "unicode/utf16.h"
1.16 +#include "ustr_imp.h"
1.17 +
1.18 +U_NAMESPACE_BEGIN
1.19 +
1.20 +UOBJECT_DEFINE_RTTI_IMPLEMENTATION(UCharCharacterIterator)
1.21 +
1.22 +UCharCharacterIterator::UCharCharacterIterator()
1.23 + : CharacterIterator(),
1.24 + text(0)
1.25 +{
1.26 + // never default construct!
1.27 +}
1.28 +
1.29 +UCharCharacterIterator::UCharCharacterIterator(const UChar* textPtr,
1.30 + int32_t length)
1.31 + : CharacterIterator(textPtr != 0 ? (length>=0 ? length : u_strlen(textPtr)) : 0),
1.32 + text(textPtr)
1.33 +{
1.34 +}
1.35 +
1.36 +UCharCharacterIterator::UCharCharacterIterator(const UChar* textPtr,
1.37 + int32_t length,
1.38 + int32_t position)
1.39 + : CharacterIterator(textPtr != 0 ? (length>=0 ? length : u_strlen(textPtr)) : 0, position),
1.40 + text(textPtr)
1.41 +{
1.42 +}
1.43 +
1.44 +UCharCharacterIterator::UCharCharacterIterator(const UChar* textPtr,
1.45 + int32_t length,
1.46 + int32_t textBegin,
1.47 + int32_t textEnd,
1.48 + int32_t position)
1.49 + : CharacterIterator(textPtr != 0 ? (length>=0 ? length : u_strlen(textPtr)) : 0, textBegin, textEnd, position),
1.50 + text(textPtr)
1.51 +{
1.52 +}
1.53 +
1.54 +UCharCharacterIterator::UCharCharacterIterator(const UCharCharacterIterator& that)
1.55 +: CharacterIterator(that),
1.56 + text(that.text)
1.57 +{
1.58 +}
1.59 +
1.60 +UCharCharacterIterator&
1.61 +UCharCharacterIterator::operator=(const UCharCharacterIterator& that) {
1.62 + CharacterIterator::operator=(that);
1.63 + text = that.text;
1.64 + return *this;
1.65 +}
1.66 +
1.67 +UCharCharacterIterator::~UCharCharacterIterator() {
1.68 +}
1.69 +
1.70 +UBool
1.71 +UCharCharacterIterator::operator==(const ForwardCharacterIterator& that) const {
1.72 + if (this == &that) {
1.73 + return TRUE;
1.74 + }
1.75 + if (typeid(*this) != typeid(that)) {
1.76 + return FALSE;
1.77 + }
1.78 +
1.79 + UCharCharacterIterator& realThat = (UCharCharacterIterator&)that;
1.80 +
1.81 + return text == realThat.text
1.82 + && textLength == realThat.textLength
1.83 + && pos == realThat.pos
1.84 + && begin == realThat.begin
1.85 + && end == realThat.end;
1.86 +}
1.87 +
1.88 +int32_t
1.89 +UCharCharacterIterator::hashCode() const {
1.90 + return ustr_hashUCharsN(text, textLength) ^ pos ^ begin ^ end;
1.91 +}
1.92 +
1.93 +CharacterIterator*
1.94 +UCharCharacterIterator::clone() const {
1.95 + return new UCharCharacterIterator(*this);
1.96 +}
1.97 +
1.98 +UChar
1.99 +UCharCharacterIterator::first() {
1.100 + pos = begin;
1.101 + if(pos < end) {
1.102 + return text[pos];
1.103 + } else {
1.104 + return DONE;
1.105 + }
1.106 +}
1.107 +
1.108 +UChar
1.109 +UCharCharacterIterator::firstPostInc() {
1.110 + pos = begin;
1.111 + if(pos < end) {
1.112 + return text[pos++];
1.113 + } else {
1.114 + return DONE;
1.115 + }
1.116 +}
1.117 +
1.118 +UChar
1.119 +UCharCharacterIterator::last() {
1.120 + pos = end;
1.121 + if(pos > begin) {
1.122 + return text[--pos];
1.123 + } else {
1.124 + return DONE;
1.125 + }
1.126 +}
1.127 +
1.128 +UChar
1.129 +UCharCharacterIterator::setIndex(int32_t position) {
1.130 + if(position < begin) {
1.131 + pos = begin;
1.132 + } else if(position > end) {
1.133 + pos = end;
1.134 + } else {
1.135 + pos = position;
1.136 + }
1.137 + if(pos < end) {
1.138 + return text[pos];
1.139 + } else {
1.140 + return DONE;
1.141 + }
1.142 +}
1.143 +
1.144 +UChar
1.145 +UCharCharacterIterator::current() const {
1.146 + if (pos >= begin && pos < end) {
1.147 + return text[pos];
1.148 + } else {
1.149 + return DONE;
1.150 + }
1.151 +}
1.152 +
1.153 +UChar
1.154 +UCharCharacterIterator::next() {
1.155 + if (pos + 1 < end) {
1.156 + return text[++pos];
1.157 + } else {
1.158 + /* make current() return DONE */
1.159 + pos = end;
1.160 + return DONE;
1.161 + }
1.162 +}
1.163 +
1.164 +UChar
1.165 +UCharCharacterIterator::nextPostInc() {
1.166 + if (pos < end) {
1.167 + return text[pos++];
1.168 + } else {
1.169 + return DONE;
1.170 + }
1.171 +}
1.172 +
1.173 +UBool
1.174 +UCharCharacterIterator::hasNext() {
1.175 + return (UBool)(pos < end ? TRUE : FALSE);
1.176 +}
1.177 +
1.178 +UChar
1.179 +UCharCharacterIterator::previous() {
1.180 + if (pos > begin) {
1.181 + return text[--pos];
1.182 + } else {
1.183 + return DONE;
1.184 + }
1.185 +}
1.186 +
1.187 +UBool
1.188 +UCharCharacterIterator::hasPrevious() {
1.189 + return (UBool)(pos > begin ? TRUE : FALSE);
1.190 +}
1.191 +
1.192 +UChar32
1.193 +UCharCharacterIterator::first32() {
1.194 + pos = begin;
1.195 + if(pos < end) {
1.196 + int32_t i = pos;
1.197 + UChar32 c;
1.198 + U16_NEXT(text, i, end, c);
1.199 + return c;
1.200 + } else {
1.201 + return DONE;
1.202 + }
1.203 +}
1.204 +
1.205 +UChar32
1.206 +UCharCharacterIterator::first32PostInc() {
1.207 + pos = begin;
1.208 + if(pos < end) {
1.209 + UChar32 c;
1.210 + U16_NEXT(text, pos, end, c);
1.211 + return c;
1.212 + } else {
1.213 + return DONE;
1.214 + }
1.215 +}
1.216 +
1.217 +UChar32
1.218 +UCharCharacterIterator::last32() {
1.219 + pos = end;
1.220 + if(pos > begin) {
1.221 + UChar32 c;
1.222 + U16_PREV(text, begin, pos, c);
1.223 + return c;
1.224 + } else {
1.225 + return DONE;
1.226 + }
1.227 +}
1.228 +
1.229 +UChar32
1.230 +UCharCharacterIterator::setIndex32(int32_t position) {
1.231 + if(position < begin) {
1.232 + position = begin;
1.233 + } else if(position > end) {
1.234 + position = end;
1.235 + }
1.236 + if(position < end) {
1.237 + U16_SET_CP_START(text, begin, position);
1.238 + int32_t i = this->pos = position;
1.239 + UChar32 c;
1.240 + U16_NEXT(text, i, end, c);
1.241 + return c;
1.242 + } else {
1.243 + this->pos = position;
1.244 + return DONE;
1.245 + }
1.246 +}
1.247 +
1.248 +UChar32
1.249 +UCharCharacterIterator::current32() const {
1.250 + if (pos >= begin && pos < end) {
1.251 + UChar32 c;
1.252 + U16_GET(text, begin, pos, end, c);
1.253 + return c;
1.254 + } else {
1.255 + return DONE;
1.256 + }
1.257 +}
1.258 +
1.259 +UChar32
1.260 +UCharCharacterIterator::next32() {
1.261 + if (pos < end) {
1.262 + U16_FWD_1(text, pos, end);
1.263 + if(pos < end) {
1.264 + int32_t i = pos;
1.265 + UChar32 c;
1.266 + U16_NEXT(text, i, end, c);
1.267 + return c;
1.268 + }
1.269 + }
1.270 + /* make current() return DONE */
1.271 + pos = end;
1.272 + return DONE;
1.273 +}
1.274 +
1.275 +UChar32
1.276 +UCharCharacterIterator::next32PostInc() {
1.277 + if (pos < end) {
1.278 + UChar32 c;
1.279 + U16_NEXT(text, pos, end, c);
1.280 + return c;
1.281 + } else {
1.282 + return DONE;
1.283 + }
1.284 +}
1.285 +
1.286 +UChar32
1.287 +UCharCharacterIterator::previous32() {
1.288 + if (pos > begin) {
1.289 + UChar32 c;
1.290 + U16_PREV(text, begin, pos, c);
1.291 + return c;
1.292 + } else {
1.293 + return DONE;
1.294 + }
1.295 +}
1.296 +
1.297 +int32_t
1.298 +UCharCharacterIterator::move(int32_t delta, CharacterIterator::EOrigin origin) {
1.299 + switch(origin) {
1.300 + case kStart:
1.301 + pos = begin + delta;
1.302 + break;
1.303 + case kCurrent:
1.304 + pos += delta;
1.305 + break;
1.306 + case kEnd:
1.307 + pos = end + delta;
1.308 + break;
1.309 + default:
1.310 + break;
1.311 + }
1.312 +
1.313 + if(pos < begin) {
1.314 + pos = begin;
1.315 + } else if(pos > end) {
1.316 + pos = end;
1.317 + }
1.318 +
1.319 + return pos;
1.320 +}
1.321 +
1.322 +int32_t
1.323 +UCharCharacterIterator::move32(int32_t delta, CharacterIterator::EOrigin origin) {
1.324 + // this implementation relies on the "safe" version of the UTF macros
1.325 + // (or the trustworthiness of the caller)
1.326 + switch(origin) {
1.327 + case kStart:
1.328 + pos = begin;
1.329 + if(delta > 0) {
1.330 + U16_FWD_N(text, pos, end, delta);
1.331 + }
1.332 + break;
1.333 + case kCurrent:
1.334 + if(delta > 0) {
1.335 + U16_FWD_N(text, pos, end, delta);
1.336 + } else {
1.337 + U16_BACK_N(text, begin, pos, -delta);
1.338 + }
1.339 + break;
1.340 + case kEnd:
1.341 + pos = end;
1.342 + if(delta < 0) {
1.343 + U16_BACK_N(text, begin, pos, -delta);
1.344 + }
1.345 + break;
1.346 + default:
1.347 + break;
1.348 + }
1.349 +
1.350 + return pos;
1.351 +}
1.352 +
1.353 +void UCharCharacterIterator::setText(const UChar* newText,
1.354 + int32_t newTextLength) {
1.355 + text = newText;
1.356 + if(newText == 0 || newTextLength < 0) {
1.357 + newTextLength = 0;
1.358 + }
1.359 + end = textLength = newTextLength;
1.360 + pos = begin = 0;
1.361 +}
1.362 +
1.363 +void
1.364 +UCharCharacterIterator::getText(UnicodeString& result) {
1.365 + result = UnicodeString(text, textLength);
1.366 +}
1.367 +
1.368 +U_NAMESPACE_END
