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