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-rw-r--r--src/core/SkValidatingReadBuffer.cpp306
1 files changed, 0 insertions, 306 deletions
diff --git a/src/core/SkValidatingReadBuffer.cpp b/src/core/SkValidatingReadBuffer.cpp
deleted file mode 100644
index e13cde5da6..0000000000
--- a/src/core/SkValidatingReadBuffer.cpp
+++ /dev/null
@@ -1,306 +0,0 @@
-/*
- * Copyright 2013 Google Inc.
- *
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-#include "SkBitmap.h"
-#include "SkMatrixPriv.h"
-#include "SkValidatingReadBuffer.h"
-#include "SkStream.h"
-#include "SkTypeface.h"
-
-SkValidatingReadBuffer::SkValidatingReadBuffer(const void* data, size_t size) :
- fError(false) {
- this->setMemory(data, size);
- this->setFlags(SkReadBuffer::kValidation_Flag);
-}
-
-SkValidatingReadBuffer::~SkValidatingReadBuffer() {
-}
-
-bool SkValidatingReadBuffer::validate(bool isValid) {
- if (!fError && !isValid) {
- // When an error is found, send the read cursor to the end of the stream
- fReader.skip(fReader.available());
- fError = true;
- }
- return !fError;
-}
-
-bool SkValidatingReadBuffer::isValid() const {
- return !fError;
-}
-
-void SkValidatingReadBuffer::setMemory(const void* data, size_t size) {
- this->validate(IsPtrAlign4(data) && (SkAlign4(size) == size));
- if (!fError) {
- fReader.setMemory(data, size);
- }
-}
-
-const void* SkValidatingReadBuffer::skip(size_t size) {
- size_t inc = SkAlign4(size);
- this->validate(inc >= size);
- const void* addr = fReader.peek();
- this->validate(IsPtrAlign4(addr) && fReader.isAvailable(inc));
- if (fError) {
- return nullptr;
- }
-
- fReader.skip(size);
- return addr;
-}
-
-// All the methods in this file funnel down into either readInt(), readScalar() or skip(),
-// followed by a memcpy. So we've got all our validation in readInt(), readScalar() and skip();
-// if they fail they'll return a zero value or skip nothing, respectively, and set fError to
-// true, which the caller should check to see if an error occurred during the read operation.
-
-bool SkValidatingReadBuffer::readBool() {
- uint32_t value = this->readInt();
- // Boolean value should be either 0 or 1
- this->validate(!(value & ~1));
- return value != 0;
-}
-
-SkColor SkValidatingReadBuffer::readColor() {
- return this->readInt();
-}
-
-int32_t SkValidatingReadBuffer::readInt() {
- const size_t inc = sizeof(int32_t);
- this->validate(IsPtrAlign4(fReader.peek()) && fReader.isAvailable(inc));
- return fError ? 0 : fReader.readInt();
-}
-
-SkScalar SkValidatingReadBuffer::readScalar() {
- const size_t inc = sizeof(SkScalar);
- this->validate(IsPtrAlign4(fReader.peek()) && fReader.isAvailable(inc));
- return fError ? 0 : fReader.readScalar();
-}
-
-uint32_t SkValidatingReadBuffer::readUInt() {
- return this->readInt();
-}
-
-int32_t SkValidatingReadBuffer::read32() {
- return this->readInt();
-}
-
-uint8_t SkValidatingReadBuffer::peekByte() {
- if (fReader.available() <= 0) {
- fError = true;
- return 0;
- }
- return *((uint8_t*) fReader.peek());
-}
-
-void SkValidatingReadBuffer::readString(SkString* string) {
- const size_t len = this->readUInt();
- const void* ptr = fReader.peek();
- const char* cptr = (const char*)ptr;
-
- // skip over the string + '\0' and then pad to a multiple of 4
- const size_t alignedSize = SkAlign4(len + 1);
- this->skip(alignedSize);
- if (!fError) {
- this->validate(cptr[len] == '\0');
- }
- if (!fError) {
- string->set(cptr, len);
- }
-}
-
-void SkValidatingReadBuffer::readColor4f(SkColor4f* color) {
- const void* ptr = this->skip(sizeof(SkColor4f));
- if (!fError) {
- memcpy(color, ptr, sizeof(SkColor4f));
- } else {
- *color = SkColor4f::FromColor(SK_ColorBLACK);
- }
-}
-
-void SkValidatingReadBuffer::readPoint(SkPoint* point) {
- point->fX = this->readScalar();
- point->fY = this->readScalar();
-}
-
-void SkValidatingReadBuffer::readPoint3(SkPoint3* point) {
- point->fX = this->readScalar();
- point->fY = this->readScalar();
- point->fZ = this->readScalar();
-}
-
-void SkValidatingReadBuffer::readMatrix(SkMatrix* matrix) {
- size_t size = 0;
- if (!fError) {
- size = SkMatrixPriv::ReadFromMemory(matrix, fReader.peek(), fReader.available());
- this->validate((SkAlign4(size) == size) && (0 != size));
- }
- if (!fError) {
- (void)this->skip(size);
- }
-}
-
-void SkValidatingReadBuffer::readIRect(SkIRect* rect) {
- const void* ptr = this->skip(sizeof(SkIRect));
- if (!fError) {
- memcpy(rect, ptr, sizeof(SkIRect));
- } else {
- rect->setEmpty();
- }
-}
-
-void SkValidatingReadBuffer::readRect(SkRect* rect) {
- const void* ptr = this->skip(sizeof(SkRect));
- if (!fError) {
- memcpy(rect, ptr, sizeof(SkRect));
- } else {
- rect->setEmpty();
- }
-}
-
-void SkValidatingReadBuffer::readRRect(SkRRect* rrect) {
- const void* ptr = this->skip(sizeof(SkRRect));
- if (!fError) {
- memcpy(rrect, ptr, sizeof(SkRRect));
- this->validate(rrect->isValid());
- }
-
- if (fError) {
- rrect->setEmpty();
- }
-}
-
-void SkValidatingReadBuffer::readRegion(SkRegion* region) {
- size_t size = 0;
- if (!fError) {
- size = region->readFromMemory(fReader.peek(), fReader.available());
- this->validate((SkAlign4(size) == size) && (0 != size));
- }
- if (!fError) {
- (void)this->skip(size);
- }
-}
-
-void SkValidatingReadBuffer::readPath(SkPath* path) {
- size_t size = 0;
- if (!fError) {
- size = path->readFromMemory(fReader.peek(), fReader.available());
- this->validate((SkAlign4(size) == size) && (0 != size));
- }
- if (!fError) {
- (void)this->skip(size);
- }
-}
-
-bool SkValidatingReadBuffer::readArray(void* value, size_t size, size_t elementSize) {
- const uint32_t count = this->getArrayCount();
- this->validate(size == count);
- (void)this->skip(sizeof(uint32_t)); // Skip array count
- const uint64_t byteLength64 = sk_64_mul(count, elementSize);
- const size_t byteLength = count * elementSize;
- this->validate(byteLength == byteLength64);
- const void* ptr = this->skip(SkAlign4(byteLength));
- if (!fError) {
- memcpy(value, ptr, byteLength);
- return true;
- }
- return false;
-}
-
-bool SkValidatingReadBuffer::readByteArray(void* value, size_t size) {
- return this->readArray(static_cast<unsigned char*>(value), size, sizeof(unsigned char));
-}
-
-bool SkValidatingReadBuffer::readColorArray(SkColor* colors, size_t size) {
- return this->readArray(colors, size, sizeof(SkColor));
-}
-
-bool SkValidatingReadBuffer::readColor4fArray(SkColor4f* colors, size_t size) {
- return this->readArray(colors, size, sizeof(SkColor4f));
-}
-
-bool SkValidatingReadBuffer::readIntArray(int32_t* values, size_t size) {
- return this->readArray(values, size, sizeof(int32_t));
-}
-
-bool SkValidatingReadBuffer::readPointArray(SkPoint* points, size_t size) {
- return this->readArray(points, size, sizeof(SkPoint));
-}
-
-bool SkValidatingReadBuffer::readScalarArray(SkScalar* values, size_t size) {
- return this->readArray(values, size, sizeof(SkScalar));
-}
-
-uint32_t SkValidatingReadBuffer::getArrayCount() {
- const size_t inc = sizeof(uint32_t);
- fError = fError || !IsPtrAlign4(fReader.peek()) || !fReader.isAvailable(inc);
- return fError ? 0 : *(uint32_t*)fReader.peek();
-}
-
-SkFlattenable* SkValidatingReadBuffer::readFlattenable(SkFlattenable::Type type) {
- // The validating read buffer always uses strings and string-indices for unflattening.
- SkASSERT(0 == this->factoryCount());
-
- uint8_t firstByte = this->peekByte();
- if (fError) {
- return nullptr;
- }
-
- SkString name;
- if (firstByte) {
- // If the first byte is non-zero, the flattenable is specified by a string.
- this->readString(&name);
- if (fError) {
- return nullptr;
- }
-
- // Add the string to the dictionary.
- fFlattenableDict.set(fFlattenableDict.count() + 1, name);
- } else {
- // Read the index. We are guaranteed that the first byte
- // is zeroed, so we must shift down a byte.
- uint32_t index = this->readUInt() >> 8;
- if (0 == index) {
- return nullptr; // writer failed to give us the flattenable
- }
-
- SkString* namePtr = fFlattenableDict.find(index);
- if (!namePtr) {
- return nullptr;
- }
- name = *namePtr;
- }
-
- // Is this the type we wanted ?
- const char* cname = name.c_str();
- SkFlattenable::Type baseType;
- if (!SkFlattenable::NameToType(cname, &baseType) || (baseType != type)) {
- return nullptr;
- }
-
- // Get the factory for this flattenable.
- SkFlattenable::Factory factory = this->getCustomFactory(name);
- if (!factory) {
- factory = SkFlattenable::NameToFactory(cname);
- if (!factory) {
- return nullptr; // writer failed to give us the flattenable
- }
- }
-
- // If we get here, the factory is non-null.
- sk_sp<SkFlattenable> obj;
- uint32_t sizeRecorded = this->readUInt();
- size_t offset = fReader.offset();
- obj = (*factory)(*this);
- // check that we read the amount we expected
- size_t sizeRead = fReader.offset() - offset;
- this->validate(sizeRecorded == sizeRead);
- if (fError) {
- obj = nullptr;
- }
- return obj.release();
-}
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