1 files changed, 70 insertions, 0 deletions
diff --git a/core/jni/android/graphics/Utils.cpp b/core/jni/android/graphics/Utils.cpp
new file mode 100644
index 0000000..b6ead19
--- /dev/null
+++ b/core/jni/android/graphics/Utils.cpp
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "Utils.h"
+#include "SkUtils.h"
+
+using namespace android;
+
+bool AssetStreamAdaptor::rewind() {
+    off_t pos = fAsset->seek(0, SEEK_SET);
+    if (pos == (off_t)-1) {
+        SkDebugf("----- fAsset->seek(rewind) failed\n");
+        return false;
+    }
+    return true;
+}
+
+size_t AssetStreamAdaptor::read(void* buffer, size_t size) {
+    ssize_t amount;
+
+    if (NULL == buffer) {
+        if (0 == size) {  // caller is asking us for our total length
+            return fAsset->getLength();
+        }
+        // asset->seek returns new total offset
+        // we want to return amount that was skipped
+
+        off_t oldOffset = fAsset->seek(0, SEEK_CUR);
+        if (-1 == oldOffset) {
+            SkDebugf("---- fAsset->seek(oldOffset) failed\n");
+            return 0;
+        }
+        off_t newOffset = fAsset->seek(size, SEEK_CUR);
+        if (-1 == newOffset) {
+            SkDebugf("---- fAsset->seek(%d) failed\n", size);
+            return 0;
+        }
+        amount = newOffset - oldOffset;
+    } else {
+        amount = fAsset->read(buffer, size);
+        if (amount <= 0) {
+            SkDebugf("---- fAsset->read(%d) returned %d\n", size, amount);
+        }
+    }
+
+    if (amount < 0) {
+        amount = 0;
+    }
+    return amount;
+}
+
+jobject android::nullObjectReturn(const char msg[]) {
+    if (msg) {
+        SkDebugf("--- %s\n", msg);
+    }
+    return NULL;
+}