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