michael@0: /*
michael@0:  * Copyright 2013 Google Inc.
michael@0:  *
michael@0:  * Use of this source code is governed by a BSD-style license that can be
michael@0:  * found in the LICENSE file.
michael@0:  */
michael@0: 
michael@0: #ifndef SkValidatingReadBuffer_DEFINED
michael@0: #define SkValidatingReadBuffer_DEFINED
michael@0: 
michael@0: #include "SkRefCnt.h"
michael@0: #include "SkBitmapHeap.h"
michael@0: #include "SkReadBuffer.h"
michael@0: #include "SkWriteBuffer.h"
michael@0: #include "SkPath.h"
michael@0: #include "SkPicture.h"
michael@0: #include "SkReader32.h"
michael@0: 
michael@0: class SkBitmap;
michael@0: 
michael@0: class SkValidatingReadBuffer : public SkReadBuffer {
michael@0: public:
michael@0:     SkValidatingReadBuffer(const void* data, size_t size);
michael@0:     virtual ~SkValidatingReadBuffer();
michael@0: 
michael@0:     const void* skip(size_t size);
michael@0: 
michael@0:     // primitives
michael@0:     virtual bool readBool() SK_OVERRIDE;
michael@0:     virtual SkColor readColor() SK_OVERRIDE;
michael@0:     virtual SkFixed readFixed() SK_OVERRIDE;
michael@0:     virtual int32_t readInt() SK_OVERRIDE;
michael@0:     virtual SkScalar readScalar() SK_OVERRIDE;
michael@0:     virtual uint32_t readUInt() SK_OVERRIDE;
michael@0:     virtual int32_t read32() SK_OVERRIDE;
michael@0: 
michael@0:     // strings -- the caller is responsible for freeing the string contents
michael@0:     virtual void readString(SkString* string) SK_OVERRIDE;
michael@0:     virtual void* readEncodedString(size_t* length, SkPaint::TextEncoding encoding) SK_OVERRIDE;
michael@0: 
michael@0:     // common data structures
michael@0:     virtual SkFlattenable* readFlattenable(SkFlattenable::Type type) SK_OVERRIDE;
michael@0:     virtual void readPoint(SkPoint* point) SK_OVERRIDE;
michael@0:     virtual void readMatrix(SkMatrix* matrix) SK_OVERRIDE;
michael@0:     virtual void readIRect(SkIRect* rect) SK_OVERRIDE;
michael@0:     virtual void readRect(SkRect* rect) SK_OVERRIDE;
michael@0:     virtual void readRegion(SkRegion* region) SK_OVERRIDE;
michael@0:     virtual void readPath(SkPath* path) SK_OVERRIDE;
michael@0: 
michael@0:     // binary data and arrays
michael@0:     virtual bool readByteArray(void* value, size_t size) SK_OVERRIDE;
michael@0:     virtual bool readColorArray(SkColor* colors, size_t size) SK_OVERRIDE;
michael@0:     virtual bool readIntArray(int32_t* values, size_t size) SK_OVERRIDE;
michael@0:     virtual bool readPointArray(SkPoint* points, size_t size) SK_OVERRIDE;
michael@0:     virtual bool readScalarArray(SkScalar* values, size_t size) SK_OVERRIDE;
michael@0: 
michael@0:     // helpers to get info about arrays and binary data
michael@0:     virtual uint32_t getArrayCount() SK_OVERRIDE;
michael@0: 
michael@0:     virtual void readBitmap(SkBitmap* bitmap) SK_OVERRIDE;
michael@0:     // TODO: Implement this (securely) when needed
michael@0:     virtual SkTypeface* readTypeface() SK_OVERRIDE;
michael@0: 
michael@0:     virtual bool validate(bool isValid) SK_OVERRIDE;
michael@0:     virtual bool isValid() const SK_OVERRIDE;
michael@0: 
michael@0:     virtual bool validateAvailable(size_t size) SK_OVERRIDE;
michael@0: 
michael@0: private:
michael@0:     bool readArray(void* value, size_t size, size_t elementSize);
michael@0: 
michael@0:     void setMemory(const void* data, size_t size);
michael@0: 
michael@0:     static bool IsPtrAlign4(const void* ptr) {
michael@0:         return SkIsAlign4((uintptr_t)ptr);
michael@0:     }
michael@0: 
michael@0:     bool fError;
michael@0: 
michael@0:     typedef SkReadBuffer INHERITED;
michael@0: };
michael@0: 
michael@0: #endif // SkValidatingReadBuffer_DEFINED