Consolidate SkStream copying methods

src/core/SkStream.cpp

 
 /*
  * Copyright 2006 The Android Open Source Project
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "SkStream.h"
@@ skipping 872 matching lines @@
 
 // Declared in SkStreamPriv.h:
 SkData* SkCopyStreamToData(SkStream* stream) {
     SkASSERT(stream != nullptr);
 
     if (stream->hasLength()) {
         return SkData::NewFromStream(stream, stream->getLength());
     }
 
     SkDynamicMemoryWStream tempStream;
-    const size_t bufferSize = 4096;
-    char buffer[bufferSize];
-    do {
-        size_t bytesRead = stream->read(buffer, bufferSize);
-        tempStream.write(buffer, bytesRead);
-    } while (!stream->isAtEnd());
+    if (!SkStreamCopy(&tempStream, stream)) {
+        return nullptr;
+    }
     return tempStream.copyToData();
 }
 
 bool SkStreamCopy(SkWStream* out, SkStream* input) {
     const char* base = static_cast<const char*>(input->getMemoryBase());
     if (base && input->hasPosition() && input->hasLength()) {
         // Shortcut that avoids the while loop.
         size_t position = input->getPosition();
         size_t length = input->getLength();
         SkASSERT(length >= position);
         return out->write(&base[position], length - position);
     }
     char scratch[4096];
     size_t count;
     while (true) {
         count = input->read(scratch, sizeof(scratch));
         if (0 == count) {
             return true;
         }
         if (!out->write(scratch, count)) {
             return false;
         }
     }
 }