58 lines
1.6 KiB
C++
58 lines
1.6 KiB
C++
/*
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* Copyright 2014 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 <img_utils/Input.h>
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namespace android {
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namespace img_utils {
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Input::~Input() {}
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status_t Input::open() { return OK; }
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status_t Input::close() { return OK; }
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ssize_t Input::skip(size_t count) {
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const size_t SKIP_BUF_SIZE = 1024;
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uint8_t skipBuf[SKIP_BUF_SIZE];
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size_t remaining = count;
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while (remaining > 0) {
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size_t amt = (SKIP_BUF_SIZE > remaining) ? remaining : SKIP_BUF_SIZE;
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ssize_t ret = read(skipBuf, 0, amt);
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if (ret < 0) {
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if(ret == NOT_ENOUGH_DATA) {
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// End of file encountered
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if (remaining == count) {
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// Read no bytes, return EOF
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return NOT_ENOUGH_DATA;
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} else {
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// Return num bytes read
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return count - remaining;
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}
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}
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// Return error code.
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return ret;
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}
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remaining -= ret;
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}
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return count;
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}
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} /*namespace img_utils*/
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} /*namespace android*/
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