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      1 /*
      2 *******************************************************************************
      3 * Copyright (C) 2009-2010, International Business Machines Corporation and
      4 * others. All Rights Reserved.
      5 *******************************************************************************
      6 */
      7 
      8 #include "unicode/utypes.h"
      9 
     10 #if !UCONFIG_NO_FORMATTING
     11 
     12 #include "fphdlimp.h"
     13 #include "uvectr32.h"
     14 
     15 U_NAMESPACE_BEGIN
     16 
     17 // utility FieldPositionHandler
     18 // base class, null implementation
     19 
     20 FieldPositionHandler::~FieldPositionHandler() {
     21 }
     22 
     23 void
     24 FieldPositionHandler::addAttribute(int32_t, int32_t, int32_t) {
     25 }
     26 
     27 void
     28 FieldPositionHandler::shiftLast(int32_t) {
     29 }
     30 
     31 UBool
     32 FieldPositionHandler::isRecording(void) {
     33   return FALSE;
     34 }
     35 
     36 
     37 // utility subclass FieldPositionOnlyHandler
     38 
     39 FieldPositionOnlyHandler::FieldPositionOnlyHandler(FieldPosition& _pos)
     40   : pos(_pos) {
     41 }
     42 
     43 FieldPositionOnlyHandler::~FieldPositionOnlyHandler() {
     44 }
     45 
     46 void
     47 FieldPositionOnlyHandler::addAttribute(int32_t id, int32_t start, int32_t limit) {
     48   if (pos.getField() == id) {
     49     pos.setBeginIndex(start);
     50     pos.setEndIndex(limit);
     51   }
     52 }
     53 
     54 void
     55 FieldPositionOnlyHandler::shiftLast(int32_t delta) {
     56   if (delta != 0 && pos.getField() != FieldPosition::DONT_CARE && pos.getBeginIndex() != -1) {
     57     pos.setBeginIndex(delta + pos.getBeginIndex());
     58     pos.setEndIndex(delta + pos.getEndIndex());
     59   }
     60 }
     61 
     62 UBool
     63 FieldPositionOnlyHandler::isRecording(void) {
     64   return pos.getField() != FieldPosition::DONT_CARE;
     65 }
     66 
     67 
     68 // utility subclass FieldPositionIteratorHandler
     69 
     70 FieldPositionIteratorHandler::FieldPositionIteratorHandler(FieldPositionIterator* posIter,
     71                                                            UErrorCode& _status)
     72     : iter(posIter), vec(NULL), status(_status) {
     73   if (iter && U_SUCCESS(status)) {
     74     vec = new UVector32(status);
     75   }
     76 }
     77 
     78 FieldPositionIteratorHandler::~FieldPositionIteratorHandler() {
     79   // setData adopts the vec regardless of status, so it's safe to null it
     80   if (iter) {
     81     iter->setData(vec, status);
     82   }
     83   // if iter is null, we never allocated vec, so no need to free it
     84   vec = NULL;
     85 }
     86 
     87 void
     88 FieldPositionIteratorHandler::addAttribute(int32_t id, int32_t start, int32_t limit) {
     89   if (iter && U_SUCCESS(status) && start < limit) {
     90     int32_t size = vec->size();
     91     vec->addElement(id, status);
     92     vec->addElement(start, status);
     93     vec->addElement(limit, status);
     94     if (!U_SUCCESS(status)) {
     95       vec->setSize(size);
     96     }
     97   }
     98 }
     99 
    100 void
    101 FieldPositionIteratorHandler::shiftLast(int32_t delta) {
    102   if (U_SUCCESS(status) && delta != 0) {
    103     int32_t i = vec->size();
    104     if (i > 0) {
    105       --i;
    106       vec->setElementAt(delta + vec->elementAti(i), i);
    107       --i;
    108       vec->setElementAt(delta + vec->elementAti(i), i);
    109     }
    110   }
    111 }
    112 
    113 UBool
    114 FieldPositionIteratorHandler::isRecording(void) {
    115   return U_SUCCESS(status);
    116 }
    117 
    118 U_NAMESPACE_END
    119 
    120 #endif /* !UCONFIG_NO_FORMATTING */
    121