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The Tor Browser
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appendable.cpp (1938B)

      1 // © 2016 and later: Unicode, Inc. and others.
      2 // License & terms of use: http://www.unicode.org/copyright.html
      3 /*
      4 *******************************************************************************
      5 *   Copyright (C) 2011-2012, International Business Machines
      6 *   Corporation and others.  All Rights Reserved.
      7 *******************************************************************************
      8 *   file name:  appendable.cpp
      9 *   encoding:   UTF-8
     10 *   tab size:   8 (not used)
     11 *   indentation:4
     12 *
     13 *   created on: 2010dec07
     14 *   created by: Markus W. Scherer
     15 */
     16 
     17 #include "unicode/utypes.h"
     18 #include "unicode/appendable.h"
     19 #include "unicode/utf16.h"
     20 
     21 U_NAMESPACE_BEGIN
     22 
     23 Appendable::~Appendable() {}
     24 
     25 UBool
     26 Appendable::appendCodePoint(UChar32 c) {
     27    if(c<=0xffff) {
     28        return appendCodeUnit(static_cast<char16_t>(c));
     29    } else {
     30        return appendCodeUnit(U16_LEAD(c)) && appendCodeUnit(U16_TRAIL(c));
     31    }
     32 }
     33 
     34 UBool
     35 Appendable::appendString(const char16_t *s, int32_t length) {
     36    if(length<0) {
     37        char16_t c;
     38        while((c=*s++)!=0) {
     39            if(!appendCodeUnit(c)) {
     40                return false;
     41            }
     42        }
     43    } else if(length>0) {
     44        const char16_t *limit=s+length;
     45        do {
     46            if(!appendCodeUnit(*s++)) {
     47                return false;
     48            }
     49        } while(s<limit);
     50    }
     51    return true;
     52 }
     53 
     54 UBool
     55 Appendable::reserveAppendCapacity(int32_t /*appendCapacity*/) {
     56    return true;
     57 }
     58 
     59 char16_t *
     60 Appendable::getAppendBuffer(int32_t minCapacity,
     61                            int32_t /*desiredCapacityHint*/,
     62                            char16_t *scratch, int32_t scratchCapacity,
     63                            int32_t *resultCapacity) {
     64    if(minCapacity<1 || scratchCapacity<minCapacity) {
     65        *resultCapacity=0;
     66        return nullptr;
     67    }
     68    *resultCapacity=scratchCapacity;
     69    return scratch;
     70 }
     71 
     72 // UnicodeStringAppendable is implemented in unistr.cpp.
     73 
     74 U_NAMESPACE_END