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