Switch SkPDFStream's internal storage from SkStream to SkData

src/images/SkStreamHelpers.cpp

-/*
- * 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 "SkData.h"
-#include "SkStream.h"
-#include "SkStreamHelpers.h"
-#include "SkTypes.h"
-
-size_t CopyStreamToStorage(SkAutoMalloc* storage, SkStream* stream) {
-    SkASSERT(storage != NULL);
-    SkASSERT(stream != NULL);
-
-    if (stream->hasLength()) {
-        const size_t length = stream->getLength();
-        void* dst = storage->reset(length);
-        if (stream->read(dst, length) != length) {
-            return 0;
-        }
-        return length;
-    }
-
-    SkDynamicMemoryWStream tempStream;
-    // Arbitrary buffer size.
-    const size_t bufferSize = 256 * 1024; // 256KB
-    char buffer[bufferSize];
-    SkDEBUGCODE(size_t debugLength = 0;)
-    do {
-        size_t bytesRead = stream->read(buffer, bufferSize);
-        tempStream.write(buffer, bytesRead);
-        SkDEBUGCODE(debugLength += bytesRead);
-        SkASSERT(tempStream.bytesWritten() == debugLength);
-    } while (!stream->isAtEnd());
-    const size_t length = tempStream.bytesWritten();
-    void* dst = storage->reset(length);
-    tempStream.copyTo(dst);
-    return length;
-}
-
-SkData *CopyStreamToData(SkStream* stream) {
-    SkASSERT(stream != NULL);
-
-    if (stream->hasLength()) {
-        const size_t length = stream->getLength();
-        void* dst = sk_malloc_throw(length);
-        if (stream->read(dst, length) != length) {
-            return 0;
-        }
-        return SkData::NewFromMalloc(dst, length);
-    }
-
-    SkDynamicMemoryWStream tempStream;
-    // Arbitrary buffer size.
-    const size_t bufferSize = 256 * 1024; // 256KB
-    char buffer[bufferSize];
-    SkDEBUGCODE(size_t debugLength = 0;)
-    do {
-        size_t bytesRead = stream->read(buffer, bufferSize);
-        tempStream.write(buffer, bytesRead);
-        SkDEBUGCODE(debugLength += bytesRead);
-        SkASSERT(tempStream.bytesWritten() == debugLength);
-    } while (!stream->isAtEnd());
-    return tempStream.copyToData();
-}