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/*
* Copyright 2019 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 <algorithm>
#include <string.h>
#include "MemInputStream.h"
namespace parselib {
int32_t MemInputStream::read(void *buff, int32_t numBytes) {
int32_t numAvail = mBufferLen - mPos;
numBytes = std::min(numBytes, numAvail);
peek(buff, numBytes);
mPos += numBytes;
return numBytes;
}
int32_t MemInputStream::peek(void *buff, int32_t numBytes) {
int32_t numAvail = mBufferLen - mPos;
numBytes = std::min(numBytes, numAvail);
memcpy(buff, mBuffer + mPos, numBytes);
return numBytes;
}
void MemInputStream::advance(int32_t numBytes) {
if (numBytes > 0) {
int32_t numAvail = mBufferLen - mPos;
mPos += std::min(numAvail, numBytes);
}
}
int32_t MemInputStream::getPos() {
return mPos;
}
void MemInputStream::setPos(int32_t pos) {
if (pos > 0) {
if (pos < mBufferLen) {
mPos = pos;
} else {
mPos = mBufferLen - 1;
}
}
}
} // namespace parselib
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