19393dff0c
Review URL: https://codereview.appspot.com/6374057 git-svn-id: http://skia.googlecode.com/svn/trunk@4548 2bbb7eff-a529-9590-31e7-b0007b416f81
86 lines
1.9 KiB
C++
86 lines
1.9 KiB
C++
/*
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* Copyright 2012 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef SkDataSet_DEFINED
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#define SkDataSet_DEFINED
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#include "SkRefCnt.h"
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#include "SkData.h"
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class SkStream;
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class SkWStream;
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class SkFlattenableReadBuffer;
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class SkFlattenableWriteBuffer;
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class SkDataSet : public SkRefCnt {
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public:
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/**
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* Returns a new empty dataset. Note: since SkDataSet is immutable, this
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* "new" set may be the same one that was returned before, but each
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* returned object must have its reference-count balanced regardles.
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*
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* SkDataSet* empty = SkDataSet::NewEmpty();
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* ...
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* empty->unref();
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*/
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static SkDataSet* NewEmpty();
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struct Pair {
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const char* fKey;
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SkData* fValue;
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};
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SkDataSet(const char key[], SkData* value);
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SkDataSet(const Pair[], int count);
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virtual ~SkDataSet();
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bool isEmpty() const { return 0 == fCount; }
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int count() const { return fCount; }
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SkData* find(const char name[]) const;
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class Iter {
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public:
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Iter(const SkDataSet& ds) {
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fPair = ds.fPairs;
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fStop = ds.fPairs + ds.fCount;
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}
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const char* key() const {
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SkASSERT(!this->done());
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return fPair->fKey;
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}
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SkData* value() const {
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SkASSERT(!this->done());
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return fPair->fValue;
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}
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bool done() const { return fPair >= fStop; }
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void next() {
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SkASSERT(!this->done());
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fPair += 1;
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}
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private:
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const SkDataSet::Pair* fPair;
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const SkDataSet::Pair* fStop;
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};
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explicit SkDataSet(SkStream*);
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void writeToStream(SkWStream*) const;
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explicit SkDataSet(SkFlattenableReadBuffer&);
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void flatten(SkFlattenableWriteBuffer&) const;
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private:
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int32_t fCount;
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uint32_t fKeySize;
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Pair* fPairs;
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};
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#endif
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