The Tor Browser: gfx/skia/trunk/src/images/SkStreamHelpers.cpp@6474c204b198

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /*

     2  * Copyright 2013 Google Inc.

     3  *

     4  * Use of this source code is governed by a BSD-style license that can be

     5  * found in the LICENSE file.

     6  */

     8 #include "SkStream.h"

     9 #include "SkStreamHelpers.h"

    10 #include "SkTypes.h"

    12 size_t CopyStreamToStorage(SkAutoMalloc* storage, SkStream* stream) {

    13     SkASSERT(storage != NULL);

    14     SkASSERT(stream != NULL);

    16     if (stream->hasLength()) {

    17         const size_t length = stream->getLength();

    18         void* dst = storage->reset(length);

    19         if (stream->read(dst, length) != length) {

    20             return 0;

    21         }

    22         return length;

    23     }

    25     SkDynamicMemoryWStream tempStream;

    26     // Arbitrary buffer size.

    27     const size_t bufferSize = 256 * 1024; // 256KB

    28     char buffer[bufferSize];

    29     SkDEBUGCODE(size_t debugLength = 0;)

    30     do {

    31         size_t bytesRead = stream->read(buffer, bufferSize);

    32         tempStream.write(buffer, bytesRead);

    33         SkDEBUGCODE(debugLength += bytesRead);

    34         SkASSERT(tempStream.bytesWritten() == debugLength);

    35     } while (!stream->isAtEnd());

    36     const size_t length = tempStream.bytesWritten();

    37     void* dst = storage->reset(length);

    38     tempStream.copyTo(dst);

    39     return length;

    40 }

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